25 files changed, 2744 insertions, 0 deletions

diff --git a/frontend/.direnv/flake-profile b/frontend/.direnv/flake-profile
new file mode 120000
index 0000000..6e8a8e9
--- /dev/null
+++ b/frontend/.direnv/flake-profile
@@ -0,0 +1 @@
+/nix/store/m4z2i7h8x7xwac09q8gw4km9vhmi88ka-furby-env
\ No newline at end of file
diff --git a/frontend/.direnv/flake-profile.rc b/frontend/.direnv/flake-profile.rc
new file mode 100644
index 0000000..dff177f
--- /dev/null
+++ b/frontend/.direnv/flake-profile.rc
@@ -0,0 +1,1473 @@
+unset shellHook
+nix_saved_PATH="$PATH"
+AR=ar
+export AR
+AS=as
+export AS
+BASH=/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin/bash
+CC=gcc
+export CC
+CONFIG_SHELL=/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin/bash
+export CONFIG_SHELL
+CXX=g++
+export CXX
+DIRSTACK=()
+GROUPS=()
+HOSTTYPE=x86_64
+HOST_PATH=/nix/store/603kisq28l3prqr92z5hffh7fmwwsc9f-elm-0.19.1/bin:/nix/store/amj35xgl7bhifnih0mh39j8kbvsvg2xn-node__at_elm-tooling_slash_elm-language-server-1.6.3/bin:/nix/store/hzxpv4ha44w9pg8ynkfsgjhi3kb13h27-elm-format-0.8.3/bin:/nix/store/w3sh9aki5wrchcrq2wlg2xb394f8brh4-node_elm-oracle-1.1.1/bin:/nix/store/3yl8y2fkc1wsyqm008is2pdw5dja2icy-node_elm-test-0.19.1-revision2/bin:/nix/store/x0jla3hpxrwz76hy9yckg1iyc9hns81k-coreutils-8.31/bin:/nix/store/97vambzyvpvrd9wgrrw7i7svi0s8vny5-findutils-4.7.0/bin:/nix/store/dqq1bvpi3g0h4v05111b3i0ymqj4v5x1-diffutils-3.7/bin:/nix/store/p34p7ysy84579lndk7rbrz6zsfr03y71-gnused-4.8/bin:/nix/store/b0vjq4r4sp9z4l2gbkc5dyyw5qfgyi3r-gnugrep-3.4/bin:/nix/store/c8balm59sxfkw9ik1fqbkadsvjqhmbx4-gawk-5.0.1/bin:/nix/store/g7dr83wnkx4gxa5ykcljc5jg04416z60-gnutar-1.32/bin:/nix/store/kkvgr3avpp7yd5hzmc4syh43jqj03sgb-gzip-1.10/bin:/nix/store/rw96psqzgyqrcd12qr6ivk9yiskjm3ab-bzip2-1.0.6.0.1-bin/bin:/nix/store/dp6y0n9cba79wwc54n1brg7xbjsq5hka-gnumake-4.2.1/bin:/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin:/nix/store/xac1zfclx1xxgcd84vqb6hy3apl171n8-patch-2.7.6/bin:/nix/store/mm0w8jc58rn01c4kz2n9jvwd6bibcihs-xz-5.2.4-bin/bin
+export HOST_PATH
+IFS=$' \t\n'
+IN_NIX_SHELL=impure
+export IN_NIX_SHELL
+LD=ld
+export LD
+MACHTYPE=x86_64-unknown-linux-gnu
+NIX_BINTOOLS=/nix/store/n48b8n251dwwb04q7f3fwxdmirsakllz-binutils-wrapper-2.31.1
+export NIX_BINTOOLS
+NIX_BINTOOLS_WRAPPER_x86_64_unknown_linux_gnu_TARGET_HOST=1
+export NIX_BINTOOLS_WRAPPER_x86_64_unknown_linux_gnu_TARGET_HOST
+NIX_BUILD_CORES=8
+export NIX_BUILD_CORES
+NIX_CC=/nix/store/m6h7zh8w6s52clnyskffj5lbkakqgywn-gcc-wrapper-9.2.0
+export NIX_CC
+NIX_CC_WRAPPER_x86_64_unknown_linux_gnu_TARGET_HOST=1
+export NIX_CC_WRAPPER_x86_64_unknown_linux_gnu_TARGET_HOST
+NIX_ENFORCE_NO_NATIVE=1
+export NIX_ENFORCE_NO_NATIVE
+NIX_HARDENING_ENABLE='fortify stackprotector pic strictoverflow format relro bindnow'
+export NIX_HARDENING_ENABLE
+NIX_INDENT_MAKE=1
+export NIX_INDENT_MAKE
+NIX_LDFLAGS='-rpath /home/np/code/elmstuff/app-furby/outputs/out/lib64 -rpath /home/np/code/elmstuff/app-furby/outputs/out/lib '
+export NIX_LDFLAGS
+NIX_LIB64_IN_SELF_RPATH=1
+NIX_NO_SELF_RPATH=1
+NIX_STORE=/nix/store
+export NIX_STORE
+NM=nm
+export NM
+OBJCOPY=objcopy
+export OBJCOPY
+OBJDUMP=objdump
+export OBJDUMP
+OPTERR=1
+OPTIND=1
+OSTYPE=linux-gnu
+PATH=/nix/store/71n1xcigc00w3z7yc836jqcx9cb2dys8-patchelf-0.9/bin:/nix/store/m6h7zh8w6s52clnyskffj5lbkakqgywn-gcc-wrapper-9.2.0/bin:/nix/store/b3zsk4ihlpiimv3vff86bb5bxghgdzb9-gcc-9.2.0/bin:/nix/store/0k65d30z9xsixil10yw3bwajbdk4yskv-glibc-2.30-bin/bin:/nix/store/x0jla3hpxrwz76hy9yckg1iyc9hns81k-coreutils-8.31/bin:/nix/store/n48b8n251dwwb04q7f3fwxdmirsakllz-binutils-wrapper-2.31.1/bin:/nix/store/hrkc2sf2883l16d5yq3zg0y339kfw4xv-binutils-2.31.1/bin:/nix/store/0k65d30z9xsixil10yw3bwajbdk4yskv-glibc-2.30-bin/bin:/nix/store/x0jla3hpxrwz76hy9yckg1iyc9hns81k-coreutils-8.31/bin:/nix/store/603kisq28l3prqr92z5hffh7fmwwsc9f-elm-0.19.1/bin:/nix/store/amj35xgl7bhifnih0mh39j8kbvsvg2xn-node__at_elm-tooling_slash_elm-language-server-1.6.3/bin:/nix/store/hzxpv4ha44w9pg8ynkfsgjhi3kb13h27-elm-format-0.8.3/bin:/nix/store/w3sh9aki5wrchcrq2wlg2xb394f8brh4-node_elm-oracle-1.1.1/bin:/nix/store/3yl8y2fkc1wsyqm008is2pdw5dja2icy-node_elm-test-0.19.1-revision2/bin:/nix/store/x0jla3hpxrwz76hy9yckg1iyc9hns81k-coreutils-8.31/bin:/nix/store/97vambzyvpvrd9wgrrw7i7svi0s8vny5-findutils-4.7.0/bin:/nix/store/dqq1bvpi3g0h4v05111b3i0ymqj4v5x1-diffutils-3.7/bin:/nix/store/p34p7ysy84579lndk7rbrz6zsfr03y71-gnused-4.8/bin:/nix/store/b0vjq4r4sp9z4l2gbkc5dyyw5qfgyi3r-gnugrep-3.4/bin:/nix/store/c8balm59sxfkw9ik1fqbkadsvjqhmbx4-gawk-5.0.1/bin:/nix/store/g7dr83wnkx4gxa5ykcljc5jg04416z60-gnutar-1.32/bin:/nix/store/kkvgr3avpp7yd5hzmc4syh43jqj03sgb-gzip-1.10/bin:/nix/store/rw96psqzgyqrcd12qr6ivk9yiskjm3ab-bzip2-1.0.6.0.1-bin/bin:/nix/store/dp6y0n9cba79wwc54n1brg7xbjsq5hka-gnumake-4.2.1/bin:/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin:/nix/store/xac1zfclx1xxgcd84vqb6hy3apl171n8-patch-2.7.6/bin:/nix/store/mm0w8jc58rn01c4kz2n9jvwd6bibcihs-xz-5.2.4-bin/bin
+export PATH
+PIPESTATUS=([0]="0")
+PS4='+ '
+RANLIB=ranlib
+export RANLIB
+READELF=readelf
+export READELF
+SHELL=/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin/bash
+export SHELL
+SIZE=size
+export SIZE
+SOURCE_DATE_EPOCH=1
+export SOURCE_DATE_EPOCH
+STRINGS=strings
+export STRINGS
+STRIP=strip
+export STRIP
+_=export
+buildInputs='/nix/store/603kisq28l3prqr92z5hffh7fmwwsc9f-elm-0.19.1 /nix/store/amj35xgl7bhifnih0mh39j8kbvsvg2xn-node__at_elm-tooling_slash_elm-language-server-1.6.3 /nix/store/hzxpv4ha44w9pg8ynkfsgjhi3kb13h27-elm-format-0.8.3 /nix/store/w3sh9aki5wrchcrq2wlg2xb394f8brh4-node_elm-oracle-1.1.1 /nix/store/3yl8y2fkc1wsyqm008is2pdw5dja2icy-node_elm-test-0.19.1-revision2'
+export buildInputs
+builder=/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin/bash
+export builder
+commonStripFlags=--enable-deterministic-archives
+configureFlags=
+export configureFlags
+defaultBuildInputs=
+defaultNativeBuildInputs='/nix/store/71n1xcigc00w3z7yc836jqcx9cb2dys8-patchelf-0.9 /nix/store/mjjy30kxz775bhhi6j9phw81qh6dsbrf-move-docs.sh /nix/store/kxw6q8v6isaqjm702d71n2421cxamq68-make-symlinks-relative.sh /nix/store/rvg5a5nwa7cihpmbzlwzh931w3g4q108-compress-man-pages.sh /nix/store/4ygqr4w06zwcd2kcxa6w3441jijv0pvx-strip.sh /nix/store/g6hzqyjd3ricwbs0bbx4806fiwg15vnc-patch-shebangs.sh /nix/store/cickvswrvann041nqxb0rxilc46svw1n-prune-libtool-files.sh /nix/store/8zxndz5ag0p6s526c2xyllhk1nrn4c3i-audit-tmpdir.sh /nix/store/aknix5zw9cj7hd1m3h1d6nnmncl1vkvn-multiple-outputs.sh /nix/store/kd4xwxjpjxi71jkm6ka0np72if9rm3y0-move-sbin.sh /nix/store/fyaryjvghbkpfnsyw97hb3lyb37s1pd6-move-lib64.sh /nix/store/ngg1cv31c8c7bcm2n8ww4g06nq7s4zhm-set-source-date-epoch-to-latest.sh /nix/store/m6h7zh8w6s52clnyskffj5lbkakqgywn-gcc-wrapper-9.2.0'
+depsBuildBuild=
+export depsBuildBuild
+depsBuildBuildPropagated=
+export depsBuildBuildPropagated
+depsBuildTarget=
+export depsBuildTarget
+depsBuildTargetPropagated=
+export depsBuildTargetPropagated
+depsHostHost=
+export depsHostHost
+depsHostHostPropagated=
+export depsHostHostPropagated
+depsTargetTarget=
+export depsTargetTarget
+depsTargetTargetPropagated=
+export depsTargetTargetPropagated
+doCheck=
+export doCheck
+doInstallCheck=
+export doInstallCheck
+dontAddDisableDepTrack=1
+export dontAddDisableDepTrack
+envHostHostHooks=([0]="ccWrapper_addCVars" [1]="bintoolsWrapper_addLDVars")
+envHostTargetHooks=([0]="ccWrapper_addCVars" [1]="bintoolsWrapper_addLDVars")
+fixupOutputHooks=([0]="if [ -z \"\${dontPatchELF-}\" ]; then patchELF \"\$prefix\"; fi" [1]="_makeSymlinksRelative" [2]="if [ -z \"\${dontGzipMan-}\" ]; then compressManPages \"\$prefix\"; fi" [3]="_doStrip" [4]="patchShebangsAuto" [5]="_pruneLibtoolFiles" [6]="if [[ -z \"\${noAuditTmpdir-}\" && -e \"\$prefix\" ]]; then auditTmpdir \"\$prefix\"; fi" [7]="_moveSbin" [8]="_moveLib64")
+initialPath='/nix/store/x0jla3hpxrwz76hy9yckg1iyc9hns81k-coreutils-8.31 /nix/store/97vambzyvpvrd9wgrrw7i7svi0s8vny5-findutils-4.7.0 /nix/store/dqq1bvpi3g0h4v05111b3i0ymqj4v5x1-diffutils-3.7 /nix/store/p34p7ysy84579lndk7rbrz6zsfr03y71-gnused-4.8 /nix/store/b0vjq4r4sp9z4l2gbkc5dyyw5qfgyi3r-gnugrep-3.4 /nix/store/c8balm59sxfkw9ik1fqbkadsvjqhmbx4-gawk-5.0.1 /nix/store/g7dr83wnkx4gxa5ykcljc5jg04416z60-gnutar-1.32 /nix/store/kkvgr3avpp7yd5hzmc4syh43jqj03sgb-gzip-1.10 /nix/store/rw96psqzgyqrcd12qr6ivk9yiskjm3ab-bzip2-1.0.6.0.1-bin /nix/store/dp6y0n9cba79wwc54n1brg7xbjsq5hka-gnumake-4.2.1 /nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23 /nix/store/xac1zfclx1xxgcd84vqb6hy3apl171n8-patch-2.7.6 /nix/store/mm0w8jc58rn01c4kz2n9jvwd6bibcihs-xz-5.2.4-bin'
+name=furby
+export name
+nativeBuildInputs=
+export nativeBuildInputs
+out=/home/np/code/elmstuff/app-furby/outputs/out
+export out
+outputBin=out
+outputDev=out
+outputDevdoc=REMOVE
+outputDevman=out
+outputDoc=out
+outputInclude=out
+outputInfo=out
+outputLib=out
+outputMan=out
+outputs=out
+export outputs
+patches=
+export patches
+pkg=/nix/store/m6h7zh8w6s52clnyskffj5lbkakqgywn-gcc-wrapper-9.2.0
+pkgsBuildHost=([0]="/nix/store/71n1xcigc00w3z7yc836jqcx9cb2dys8-patchelf-0.9" [1]="/nix/store/mjjy30kxz775bhhi6j9phw81qh6dsbrf-move-docs.sh" [2]="/nix/store/kxw6q8v6isaqjm702d71n2421cxamq68-make-symlinks-relative.sh" [3]="/nix/store/rvg5a5nwa7cihpmbzlwzh931w3g4q108-compress-man-pages.sh" [4]="/nix/store/4ygqr4w06zwcd2kcxa6w3441jijv0pvx-strip.sh" [5]="/nix/store/g6hzqyjd3ricwbs0bbx4806fiwg15vnc-patch-shebangs.sh" [6]="/nix/store/cickvswrvann041nqxb0rxilc46svw1n-prune-libtool-files.sh" [7]="/nix/store/8zxndz5ag0p6s526c2xyllhk1nrn4c3i-audit-tmpdir.sh" [8]="/nix/store/aknix5zw9cj7hd1m3h1d6nnmncl1vkvn-multiple-outputs.sh" [9]="/nix/store/kd4xwxjpjxi71jkm6ka0np72if9rm3y0-move-sbin.sh" [10]="/nix/store/fyaryjvghbkpfnsyw97hb3lyb37s1pd6-move-lib64.sh" [11]="/nix/store/ngg1cv31c8c7bcm2n8ww4g06nq7s4zhm-set-source-date-epoch-to-latest.sh" [12]="/nix/store/m6h7zh8w6s52clnyskffj5lbkakqgywn-gcc-wrapper-9.2.0" [13]="/nix/store/n48b8n251dwwb04q7f3fwxdmirsakllz-binutils-wrapper-2.31.1")
+pkgsHostTarget=([0]="/nix/store/603kisq28l3prqr92z5hffh7fmwwsc9f-elm-0.19.1" [1]="/nix/store/amj35xgl7bhifnih0mh39j8kbvsvg2xn-node__at_elm-tooling_slash_elm-language-server-1.6.3" [2]="/nix/store/hzxpv4ha44w9pg8ynkfsgjhi3kb13h27-elm-format-0.8.3" [3]="/nix/store/w3sh9aki5wrchcrq2wlg2xb394f8brh4-node_elm-oracle-1.1.1" [4]="/nix/store/3yl8y2fkc1wsyqm008is2pdw5dja2icy-node_elm-test-0.19.1-revision2")
+postFixupHooks=([0]="_multioutPropagateDev")
+postUnpackHooks=([0]="_updateSourceDateEpochFromSourceRoot")
+preConfigureHooks=([0]="_multioutConfig")
+preFixupHooks=([0]="_moveToShare" [1]="_multioutDocs" [2]="_multioutDevs")
+prefix=/home/np/code/elmstuff/app-furby/outputs/out
+propagatedBuildDepFiles=([0]="propagated-build-build-deps" [1]="propagated-native-build-inputs" [2]="propagated-build-target-deps")
+propagatedBuildInputs=
+export propagatedBuildInputs
+propagatedHostDepFiles=([0]="propagated-host-host-deps" [1]="propagated-build-inputs")
+propagatedNativeBuildInputs=
+export propagatedNativeBuildInputs
+propagatedTargetDepFiles=([0]="propagated-target-target-deps")
+shell=/nix/store/hrpvwkjz04s9i4nmli843hyw9z4pwhww-bash-4.4-p23/bin/bash
+export shell
+src=./.
+export src
+stdenv=/nix/store/sm7kk5n84vaisqvhk1yfsjqls50j8s0m-stdenv-linux
+export stdenv
+strictDeps=
+export strictDeps
+system=x86_64-linux
+export system
+unpackCmdHooks=([0]="_defaultUnpack")
+PATH="$PATH:$nix_saved_PATH"
+_activatePkgs () 
+{ 
+    local -i hostOffset targetOffset;
+    local pkg;
+    for hostOffset in "${allPlatOffsets[@]}";
+    do
+        local pkgsVar="${pkgAccumVarVars[$hostOffset + 1]}";
+        for targetOffset in "${allPlatOffsets[@]}";
+        do
+            (( "$hostOffset" <= "$targetOffset" )) || continue;
+            local pkgsRef="${pkgsVar}[$targetOffset - $hostOffset]";
+            local pkgsSlice="${!pkgsRef}[@]";
+            for pkg in ${!pkgsSlice+"${!pkgsSlice}"};
+            do
+                activatePackage "$pkg" "$hostOffset" "$targetOffset";
+            done;
+        done;
+    done
+}
+_addRpathPrefix () 
+{ 
+    if [ "${NIX_NO_SELF_RPATH:-0}" != 1 ]; then
+        export NIX_LDFLAGS="-rpath $1/lib ${NIX_LDFLAGS-}";
+        if [ -n "${NIX_LIB64_IN_SELF_RPATH:-}" ]; then
+            export NIX_LDFLAGS="-rpath $1/lib64 ${NIX_LDFLAGS-}";
+        fi;
+        if [ -n "${NIX_LIB32_IN_SELF_RPATH:-}" ]; then
+            export NIX_LDFLAGS="-rpath $1/lib32 ${NIX_LDFLAGS-}";
+        fi;
+    fi
+}
+_addToEnv () 
+{ 
+    local -i depHostOffset depTargetOffset;
+    local pkg;
+    for depHostOffset in "${allPlatOffsets[@]}";
+    do
+        local hookVar="${pkgHookVarVars[$depHostOffset + 1]}";
+        local pkgsVar="${pkgAccumVarVars[$depHostOffset + 1]}";
+        for depTargetOffset in "${allPlatOffsets[@]}";
+        do
+            (( "$depHostOffset" <= "$depTargetOffset" )) || continue;
+            local hookRef="${hookVar}[$depTargetOffset - $depHostOffset]";
+            if [[ -z "${strictDeps-}" ]]; then
+                local visitedPkgs="";
+                for pkg in ${pkgsBuildBuild+"${pkgsBuildBuild[@]}"} ${pkgsBuildHost+"${pkgsBuildHost[@]}"} ${pkgsBuildTarget+"${pkgsBuildTarget[@]}"} ${pkgsHostHost+"${pkgsHostHost[@]}"} ${pkgsHostTarget+"${pkgsHostTarget[@]}"} ${pkgsTargetTarget+"${pkgsTargetTarget[@]}"};
+                do
+                    if [[ "$visitedPkgs" = *"$pkg"* ]]; then
+                        continue;
+                    fi;
+                    runHook "${!hookRef}" "$pkg";
+                    visitedPkgs+=" $pkg";
+                done;
+            else
+                local pkgsRef="${pkgsVar}[$depTargetOffset - $depHostOffset]";
+                local pkgsSlice="${!pkgsRef}[@]";
+                for pkg in ${!pkgsSlice+"${!pkgsSlice}"};
+                do
+                    runHook "${!hookRef}" "$pkg";
+                done;
+            fi;
+        done;
+    done
+}
+_allFlags () 
+{ 
+    for varName in $(awk 'BEGIN { for (v in ENVIRON) if (v ~ /^[a-z][a-zA-Z0-9_]*$/) print v }');
+    do
+        if (( "${NIX_DEBUG:-0}" >= 1 )); then
+            printf "@%s@ -> %q\n" "${varName}" "${!varName}";
+        fi;
+        args+=("--subst-var" "$varName");
+    done
+}
+_assignFirst () 
+{ 
+    local varName="$1";
+    local REMOVE=REMOVE;
+    shift;
+    while (( $# )); do
+        if [ -n "${!1-}" ]; then
+            eval "${varName}"="$1";
+            return;
+        fi;
+        shift;
+    done;
+    echo "Error: _assignFirst found no valid variant!";
+    return 1
+}
+_callImplicitHook () 
+{ 
+    local def="$1";
+    local hookName="$2";
+    if declare -F "$hookName" > /dev/null; then
+        "$hookName";
+    else
+        if type -p "$hookName" > /dev/null; then
+            source "$hookName";
+        else
+            if [ -n "${!hookName:-}" ]; then
+                eval "${!hookName}";
+            else
+                return "$def";
+            fi;
+        fi;
+    fi
+}
+_defaultUnpack () 
+{ 
+    local fn="$1";
+    if [ -d "$fn" ]; then
+        cp -pr --reflink=auto -- "$fn" "$(stripHash "$fn")";
+    else
+        case "$fn" in 
+            *.tar.xz | *.tar.lzma | *.txz)
+                xz -d < "$fn" | tar xf -
+            ;;
+            *.tar | *.tar.* | *.tgz | *.tbz2 | *.tbz)
+                tar xf "$fn"
+            ;;
+            *)
+                return 1
+            ;;
+        esac;
+    fi
+}
+_doStrip () 
+{ 
+    local -ra flags=(dontStripHost dontStripTarget);
+    local -ra stripCmds=(STRIP TARGET_STRIP);
+    if [[ "${STRIP-}" == "${TARGET_STRIP-}" ]]; then
+        dontStripTarget+=1;
+    fi;
+    local i;
+    for i in ${!stripCmds[@]};
+    do
+        local -n flag="${flags[$i]}";
+        local -n stripCmd="${stripCmds[$i]}";
+        if [[ -n "${dontStrip-}" || -n "${flag-}" ]] || ! type -f "${stripCmd-}" 2> /dev/null; then
+            continue;
+        fi;
+        stripDebugList=${stripDebugList:-lib lib32 lib64 libexec bin sbin};
+        if [ -n "$stripDebugList" ]; then
+            stripDirs "$stripCmd" "$stripDebugList" "${stripDebugFlags:--S}";
+        fi;
+        stripAllList=${stripAllList:-};
+        if [ -n "$stripAllList" ]; then
+            stripDirs "$stripCmd" "$stripAllList" "${stripAllFlags:--s}";
+        fi;
+    done
+}
+_eval () 
+{ 
+    if declare -F "$1" > /dev/null 2>&1; then
+        "$@";
+    else
+        eval "$1";
+    fi
+}
+_makeSymlinksRelative () 
+{ 
+    local symlinkTarget;
+    if [ -n "${dontRewriteSymlinks-}" ]; then
+        return 0;
+    fi;
+    while IFS= read -r -d '' f; do
+        symlinkTarget=$(readlink "$f");
+        if [[ "$symlinkTarget"/ != "$prefix"/* ]]; then
+            continue;
+        fi;
+        if [ ! -e "$symlinkTarget" ]; then
+            echo "the symlink $f is broken, it points to $symlinkTarget (which is missing)";
+        fi;
+        echo "rewriting symlink $f to be relative to $prefix";
+        ln -snrf "$symlinkTarget" "$f";
+    done < <(find $prefix -type l -print0)
+}
+_moveLib64 () 
+{ 
+    if [ "${dontMoveLib64-}" = 1 ]; then
+        return;
+    fi;
+    if [ ! -e "$prefix/lib64" -o -L "$prefix/lib64" ]; then
+        return;
+    fi;
+    echo "moving $prefix/lib64/* to $prefix/lib";
+    mkdir -p $prefix/lib;
+    shopt -s dotglob;
+    for i in $prefix/lib64/*;
+    do
+        mv --no-clobber "$i" $prefix/lib;
+    done;
+    shopt -u dotglob;
+    rmdir $prefix/lib64;
+    ln -s lib $prefix/lib64
+}
+_moveSbin () 
+{ 
+    if [ "${dontMoveSbin-}" = 1 ]; then
+        return;
+    fi;
+    if [ ! -e "$prefix/sbin" -o -L "$prefix/sbin" ]; then
+        return;
+    fi;
+    echo "moving $prefix/sbin/* to $prefix/bin";
+    mkdir -p $prefix/bin;
+    shopt -s dotglob;
+    for i in $prefix/sbin/*;
+    do
+        mv "$i" $prefix/bin;
+    done;
+    shopt -u dotglob;
+    rmdir $prefix/sbin;
+    ln -s bin $prefix/sbin
+}
+_moveToShare () 
+{ 
+    forceShare=${forceShare:=man doc info};
+    if [ -z "$forceShare" -o -z "$out" ]; then
+        return;
+    fi;
+    for d in $forceShare;
+    do
+        if [ -d "$out/$d" ]; then
+            if [ -d "$out/share/$d" ]; then
+                echo "both $d/ and share/$d/ exist!";
+            else
+                echo "moving $out/$d to $out/share/$d";
+                mkdir -p $out/share;
+                mv $out/$d $out/share/;
+            fi;
+        fi;
+    done
+}
+_multioutConfig () 
+{ 
+    if [ "$outputs" = "out" ] || [ -z "${setOutputFlags-1}" ]; then
+        return;
+    fi;
+    if [ -z "$shareDocName" ]; then
+        local confScript="$configureScript";
+        if [ -z "$confScript" ] && [ -x ./configure ]; then
+            confScript=./configure;
+        fi;
+        if [ -f "$confScript" ]; then
+            local shareDocName="$(sed -n "s/^PACKAGE_TARNAME='\(.*\)'$/\1/p" < "$confScript")";
+        fi;
+        if [ -n "$shareDocName" ] || echo "$shareDocName" | grep -q '[^a-zA-Z0-9_-]'; then
+            shareDocName="$(echo "$name" | sed 's/-[^a-zA-Z].*//')";
+        fi;
+    fi;
+    configureFlags="        --bindir=${!outputBin}/bin --sbindir=${!outputBin}/sbin         --includedir=${!outputInclude}/include --oldincludedir=${!outputInclude}/include         --mandir=${!outputMan}/share/man --infodir=${!outputInfo}/share/info         --docdir=${!outputDoc}/share/doc/${shareDocName}         --libdir=${!outputLib}/lib --libexecdir=${!outputLib}/libexec         --localedir=${!outputLib}/share/locale         $configureFlags";
+    installFlags="        pkgconfigdir=${!outputDev}/lib/pkgconfig         m4datadir=${!outputDev}/share/aclocal aclocaldir=${!outputDev}/share/aclocal         $installFlags"
+}
+_multioutDevs () 
+{ 
+    if [ "$outputs" = "out" ] || [ -z "${moveToDev-1}" ]; then
+        return;
+    fi;
+    moveToOutput include "${!outputInclude}";
+    moveToOutput lib/pkgconfig "${!outputDev}";
+    moveToOutput share/pkgconfig "${!outputDev}";
+    moveToOutput lib/cmake "${!outputDev}";
+    moveToOutput share/aclocal "${!outputDev}";
+    for f in "${!outputDev}"/{lib,share}/pkgconfig/*.pc;
+    do
+        echo "Patching '$f' includedir to output ${!outputInclude}";
+        sed -i "/^includedir=/s,=\${prefix},=${!outputInclude}," "$f";
+    done
+}
+_multioutDocs () 
+{ 
+    local REMOVE=REMOVE;
+    moveToOutput share/info "${!outputInfo}";
+    moveToOutput share/doc "${!outputDoc}";
+    moveToOutput share/gtk-doc "${!outputDevdoc}";
+    moveToOutput share/devhelp/books "${!outputDevdoc}";
+    moveToOutput share/man "${!outputMan}";
+    moveToOutput share/man/man3 "${!outputDevman}"
+}
+_multioutPropagateDev () 
+{ 
+    if [ "$outputs" = "out" ]; then
+        return;
+    fi;
+    local outputFirst;
+    for outputFirst in $outputs;
+    do
+        break;
+    done;
+    local propagaterOutput="$outputDev";
+    if [ -z "$propagaterOutput" ]; then
+        propagaterOutput="$outputFirst";
+    fi;
+    if [ -z "${propagatedBuildOutputs+1}" ]; then
+        local po_dirty="$outputBin $outputInclude $outputLib";
+        set +o pipefail;
+        propagatedBuildOutputs=`echo "$po_dirty"             | tr -s ' ' '\n' | grep -v -F "$propagaterOutput"             | sort -u | tr '\n' ' ' `;
+        set -o pipefail;
+    fi;
+    if [ -z "$propagatedBuildOutputs" ]; then
+        return;
+    fi;
+    mkdir -p "${!propagaterOutput}"/nix-support;
+    for output in $propagatedBuildOutputs;
+    do
+        echo -n " ${!output}" >> "${!propagaterOutput}"/nix-support/propagated-build-inputs;
+    done
+}
+_overrideFirst () 
+{ 
+    if [ -z "${!1-}" ]; then
+        _assignFirst "$@";
+    fi
+}
+_pruneLibtoolFiles () 
+{ 
+    if [ "${dontPruneLibtoolFiles-}" ] || [ ! -e "$prefix" ]; then
+        return;
+    fi;
+    find "$prefix" -type f -name '*.la' -exec grep -q '^# Generated by .*libtool' {} \; -exec grep -q "^old_library=''" {} \; -exec sed -i {} -e "/^dependency_libs='[^']/ c dependency_libs='' #pruned" \;
+}
+_updateSourceDateEpochFromSourceRoot () 
+{ 
+    if [ -n "$sourceRoot" ]; then
+        updateSourceDateEpoch "$sourceRoot";
+    fi
+}
+activatePackage () 
+{ 
+    local pkg="$1";
+    local -ri hostOffset="$2";
+    local -ri targetOffset="$3";
+    (( "$hostOffset" <= "$targetOffset" )) || exit -1;
+    if [ -f "$pkg" ]; then
+        source "$pkg";
+    fi;
+    if [[ ( -z "${strictDeps-}" || "$hostOffset" -le -1 ) && -d "$pkg/bin" ]]; then
+        addToSearchPath _PATH "$pkg/bin";
+    fi;
+    if [[ "$hostOffset" -eq 0 && -d "$pkg/bin" ]]; then
+        addToSearchPath _HOST_PATH "$pkg/bin";
+    fi;
+    if [[ -f "$pkg/nix-support/setup-hook" ]]; then
+        source "$pkg/nix-support/setup-hook";
+    fi
+}
+addEnvHooks () 
+{ 
+    local depHostOffset="$1";
+    shift;
+    local pkgHookVarsSlice="${pkgHookVarVars[$depHostOffset + 1]}[@]";
+    local pkgHookVar;
+    for pkgHookVar in "${!pkgHookVarsSlice}";
+    do
+        eval "${pkgHookVar}s"'+=("$@")';
+    done
+}
+addToSearchPath () 
+{ 
+    addToSearchPathWithCustomDelimiter ":" "$@"
+}
+addToSearchPathWithCustomDelimiter () 
+{ 
+    local delimiter="$1";
+    local varName="$2";
+    local dir="$3";
+    if [ -d "$dir" ]; then
+        export "${varName}=${!varName:+${!varName}${delimiter}}${dir}";
+    fi
+}
+auditTmpdir () 
+{ 
+    local dir="$1";
+    [ -e "$dir" ] || return 0;
+    header "checking for references to $TMPDIR/ in $dir...";
+    local i;
+    while IFS= read -r -d '' i; do
+        if [[ "$i" =~ .build-id ]]; then
+            continue;
+        fi;
+        if isELF "$i"; then
+            if { 
+                printf :;
+                patchelf --print-rpath "$i"
+            } | grep -q -F ":$TMPDIR/"; then
+                echo "RPATH of binary $i contains a forbidden reference to $TMPDIR/";
+                exit 1;
+            fi;
+        fi;
+        if isScript "$i"; then
+            if [ -e "$(dirname "$i")/.$(basename "$i")-wrapped" ]; then
+                if grep -q -F "$TMPDIR/" "$i"; then
+                    echo "wrapper script $i contains a forbidden reference to $TMPDIR/";
+                    exit 1;
+                fi;
+            fi;
+        fi;
+    done < <(find "$dir" -type f -print0);
+    stopNest
+}
+bintoolsWrapper_addLDVars () 
+{ 
+    local role_post role_pre;
+    getHostRoleEnvHook;
+    if [[ -d "$1/lib64" && ! -L "$1/lib64" ]]; then
+        export NIX_${role_pre}LDFLAGS+=" -L$1/lib64";
+    fi;
+    if [[ -d "$1/lib" ]]; then
+        local -a glob=($1/lib/lib*);
+        if [ "${#glob[*]}" -gt 0 ]; then
+            export NIX_${role_pre}LDFLAGS+=" -L$1/lib";
+        fi;
+    fi
+}
+buildPhase () 
+{ 
+    runHook preBuild;
+    : ${makeFlags=};
+    if [[ -z "$makeFlags" && -z "${makefile:-}" && ! ( -e Makefile || -e makefile || -e GNUmakefile ) ]]; then
+        echo "no Makefile, doing nothing";
+    else
+        foundMakefile=1;
+        local flagsArray=(${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} SHELL=$SHELL $makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"} $buildFlags ${buildFlagsArray+"${buildFlagsArray[@]}"});
+        echoCmd 'build flags' "${flagsArray[@]}";
+        make ${makefile:+-f $makefile} "${flagsArray[@]}";
+        unset flagsArray;
+    fi;
+    runHook postBuild
+}
+ccWrapper_addCVars () 
+{ 
+    local role_post role_pre;
+    getHostRoleEnvHook;
+    if [ -d "$1/include" ]; then
+        export NIX_${role_pre}CFLAGS_COMPILE+=" -isystem $1/include";
+    fi;
+    if [ -d "$1/Library/Frameworks" ]; then
+        export NIX_${role_pre}CFLAGS_COMPILE+=" -iframework $1/Library/Frameworks";
+    fi
+}
+checkPhase () 
+{ 
+    runHook preCheck;
+    if [[ -z "${foundMakefile:-}" ]]; then
+        echo "no Makefile or custom buildPhase, doing nothing";
+        runHook postCheck;
+        return;
+    fi;
+    if [[ -z "${checkTarget:-}" ]]; then
+        if make -n ${makefile:+-f $makefile} check > /dev/null 2>&1; then
+            checkTarget=check;
+        else
+            if make -n ${makefile:+-f $makefile} test > /dev/null 2>&1; then
+                checkTarget=test;
+            fi;
+        fi;
+    fi;
+    if [[ -z "${checkTarget:-}" ]]; then
+        echo "no check/test target in ${makefile:-Makefile}, doing nothing";
+    else
+        local flagsArray=(${enableParallelChecking:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} SHELL=$SHELL $makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"} ${checkFlags:-VERBOSE=y} ${checkFlagsArray+"${checkFlagsArray[@]}"} ${checkTarget});
+        echoCmd 'check flags' "${flagsArray[@]}";
+        make ${makefile:+-f $makefile} "${flagsArray[@]}";
+        unset flagsArray;
+    fi;
+    runHook postCheck
+}
+closeNest () 
+{ 
+    true
+}
+compressManPages () 
+{ 
+    local dir="$1";
+    if [ -L "$dir"/share ] || [ -L "$dir"/share/man ] || [ ! -d "$dir/share/man" ]; then
+        return;
+    fi;
+    echo "gzipping man pages under $dir/share/man/";
+    find "$dir"/share/man/ -type f -a '!' -regex '.*\.\(bz2\|gz\)$' -print0 | while IFS= read -r -d '' f; do
+        if gzip -c -n "$f" > "$f".gz; then
+            rm "$f";
+        else
+            rm "$f".gz;
+        fi;
+    done;
+    find "$dir"/share/man/ -type l -a '!' -regex '.*\.\(bz2\|gz\)$' -print0 | while IFS= read -r -d '' f; do
+        local target;
+        target="$(readlink -f "$f")";
+        if [ -f "$target".gz ]; then
+            ln -sf "$target".gz "$f".gz && rm "$f";
+        fi;
+    done
+}
+configurePhase () 
+{ 
+    runHook preConfigure;
+    : ${configureScript=};
+    : ${configureFlags=};
+    if [[ -z "$configureScript" && -x ./configure ]]; then
+        configureScript=./configure;
+    fi;
+    if [ -z "${dontFixLibtool:-}" ]; then
+        local i;
+        find . -iname "ltmain.sh" -print0 | while IFS='' read -r -d '' i; do
+            echo "fixing libtool script $i";
+            fixLibtool "$i";
+        done;
+    fi;
+    if [[ -z "${dontAddPrefix:-}" && -n "$prefix" ]]; then
+        configureFlags="${prefixKey:---prefix=}$prefix $configureFlags";
+    fi;
+    if [ -z "${dontAddDisableDepTrack:-}" ]; then
+        if [ -f "$configureScript" ] && grep -q dependency-tracking "$configureScript"; then
+            configureFlags="--disable-dependency-tracking $configureFlags";
+        fi;
+    fi;
+    if [ -z "${dontDisableStatic:-}" ]; then
+        if [ -f "$configureScript" ] && grep -q enable-static "$configureScript"; then
+            configureFlags="--disable-static $configureFlags";
+        fi;
+    fi;
+    if [ -n "$configureScript" ]; then
+        local flagsArray=($configureFlags ${configureFlagsArray+"${configureFlagsArray[@]}"});
+        echoCmd 'configure flags' "${flagsArray[@]}";
+        $configureScript "${flagsArray[@]}";
+        unset flagsArray;
+    else
+        echo "no configure script, doing nothing";
+    fi;
+    runHook postConfigure
+}
+consumeEntire () 
+{ 
+    if IFS='' read -r -N 0 $1; then
+        echo "consumeEntire(): ERROR: Input null bytes, won't process" 1>&2;
+        return 1;
+    fi
+}
+distPhase () 
+{ 
+    runHook preDist;
+    local flagsArray=($distFlags ${distFlagsArray+"${distFlagsArray[@]}"} ${distTarget:-dist});
+    echo 'dist flags: %q' "${flagsArray[@]}";
+    make ${makefile:+-f $makefile} "${flagsArray[@]}";
+    if [ "${dontCopyDist:-0}" != 1 ]; then
+        mkdir -p "$out/tarballs";
+        cp -pvd ${tarballs:-*.tar.gz} "$out/tarballs";
+    fi;
+    runHook postDist
+}
+dumpVars () 
+{ 
+    if [ "${noDumpEnvVars:-0}" != 1 ]; then
+        export > "$NIX_BUILD_TOP/env-vars" || true;
+    fi
+}
+echoCmd () 
+{ 
+    printf "%s:" "$1";
+    shift;
+    printf ' %q' "$@";
+    echo
+}
+exitHandler () 
+{ 
+    exitCode="$?";
+    set +e;
+    if [ -n "${showBuildStats:-}" ]; then
+        times > "$NIX_BUILD_TOP/.times";
+        local -a times=($(cat "$NIX_BUILD_TOP/.times"));
+        echo "build time elapsed: " "${times[@]}";
+    fi;
+    if (( "$exitCode" != 0 )); then
+        runHook failureHook;
+        if [ -n "${succeedOnFailure:-}" ]; then
+            echo "build failed with exit code $exitCode (ignored)";
+            mkdir -p "$out/nix-support";
+            printf "%s" "$exitCode" > "$out/nix-support/failed";
+            exit 0;
+        fi;
+    else
+        runHook exitHook;
+    fi;
+    exit "$exitCode"
+}
+findInputs () 
+{ 
+    local -r pkg="$1";
+    local -ri hostOffset="$2";
+    local -ri targetOffset="$3";
+    (( "$hostOffset" <= "$targetOffset" )) || exit -1;
+    local varVar="${pkgAccumVarVars[$hostOffset + 1]}";
+    local varRef="$varVar[\$targetOffset - \$hostOffset]";
+    local var="${!varRef}";
+    unset -v varVar varRef;
+    local varSlice="$var[*]";
+    case "${!varSlice-}" in 
+        *" $pkg "*)
+            return 0
+        ;;
+    esac;
+    unset -v varSlice;
+    eval "$var"'+=("$pkg")';
+    if ! [ -e "$pkg" ]; then
+        echo "build input $pkg does not exist" 1>&2;
+        exit 1;
+    fi;
+    local -i mapOffsetResult;
+    function mapOffset () 
+    { 
+        local -ri inputOffset="$1";
+        if (( "$inputOffset" <= 0 )); then
+            local -ri outputOffset="$inputOffset + $hostOffset";
+        else
+            local -ri outputOffset="$inputOffset - 1 + $targetOffset";
+        fi;
+        mapOffsetResult="$outputOffset"
+    };
+    local -i relHostOffset;
+    for relHostOffset in "${allPlatOffsets[@]}";
+    do
+        local files="${propagatedDepFilesVars[$relHostOffset + 1]}";
+        mapOffset relHostOffset;
+        local -i hostOffsetNext="$mapOffsetResult";
+        [[ "${allPlatOffsets[*]}" = *"$hostOffsetNext"* ]] || continue;
+        local -i relTargetOffset;
+        for relTargetOffset in "${allPlatOffsets[@]}";
+        do
+            (( "$relHostOffset" <= "$relTargetOffset" )) || continue;
+            local fileRef="${files}[$relTargetOffset - $relHostOffset]";
+            local file="${!fileRef}";
+            unset -v fileRef;
+            mapOffset relTargetOffset;
+            local -i targetOffsetNext="$mapOffsetResult";
+            [[ "${allPlatOffsets[*]}" = *"$targetOffsetNext"* ]] || continue;
+            [[ -f "$pkg/nix-support/$file" ]] || continue;
+            local pkgNext;
+            read -r -d '' pkgNext < "$pkg/nix-support/$file" || true;
+            for pkgNext in $pkgNext;
+            do
+                findInputs "$pkgNext" "$hostOffsetNext" "$targetOffsetNext";
+            done;
+        done;
+    done
+}
+fixLibtool () 
+{ 
+    sed -i -e 's^eval sys_lib_.*search_path=.*^^' "$1"
+}
+fixupPhase () 
+{ 
+    local output;
+    for output in $outputs;
+    do
+        if [ -e "${!output}" ]; then
+            chmod -R u+w "${!output}";
+        fi;
+    done;
+    runHook preFixup;
+    local output;
+    for output in $outputs;
+    do
+        prefix="${!output}" runHook fixupOutput;
+    done;
+    declare -ra flatVars=(depsBuildBuildPropagated propagatedNativeBuildInputs depsBuildTargetPropagated depsHostHostPropagated propagatedBuildInputs depsTargetTargetPropagated);
+    declare -ra flatFiles=("${propagatedBuildDepFiles[@]}" "${propagatedHostDepFiles[@]}" "${propagatedTargetDepFiles[@]}");
+    local propagatedInputsIndex;
+    for propagatedInputsIndex in "${!flatVars[@]}";
+    do
+        local propagatedInputsSlice="${flatVars[$propagatedInputsIndex]}[@]";
+        local propagatedInputsFile="${flatFiles[$propagatedInputsIndex]}";
+        [[ -n "${!propagatedInputsSlice}" ]] || continue;
+        mkdir -p "${!outputDev}/nix-support";
+        printWords ${!propagatedInputsSlice} > "${!outputDev}/nix-support/$propagatedInputsFile";
+    done;
+    if [ -n "${setupHook:-}" ]; then
+        mkdir -p "${!outputDev}/nix-support";
+        substituteAll "$setupHook" "${!outputDev}/nix-support/setup-hook";
+    fi;
+    if [ -n "${setupHooks:-}" ]; then
+        mkdir -p "${!outputDev}/nix-support";
+        local hook;
+        for hook in $setupHooks;
+        do
+            local content;
+            consumeEntire content < "$hook";
+            substituteAllStream content "file '$hook'" >> "${!outputDev}/nix-support/setup-hook";
+            unset -v content;
+        done;
+        unset -v hook;
+    fi;
+    if [ -n "${propagatedUserEnvPkgs:-}" ]; then
+        mkdir -p "${!outputBin}/nix-support";
+        printWords $propagatedUserEnvPkgs > "${!outputBin}/nix-support/propagated-user-env-packages";
+    fi;
+    runHook postFixup
+}
+genericBuild () 
+{ 
+    if [ -f "${buildCommandPath:-}" ]; then
+        source "$buildCommandPath";
+        return;
+    fi;
+    if [ -n "${buildCommand:-}" ]; then
+        eval "$buildCommand";
+        return;
+    fi;
+    if [ -z "${phases:-}" ]; then
+        phases="${prePhases:-} unpackPhase patchPhase ${preConfigurePhases:-}             configurePhase ${preBuildPhases:-} buildPhase checkPhase             ${preInstallPhases:-} installPhase ${preFixupPhases:-} fixupPhase installCheckPhase             ${preDistPhases:-} distPhase ${postPhases:-}";
+    fi;
+    for curPhase in $phases;
+    do
+        if [[ "$curPhase" = unpackPhase && -n "${dontUnpack:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = configurePhase && -n "${dontConfigure:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = buildPhase && -n "${dontBuild:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = checkPhase && -z "${doCheck:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = installPhase && -n "${dontInstall:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = fixupPhase && -n "${dontFixup:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = installCheckPhase && -z "${doInstallCheck:-}" ]]; then
+            continue;
+        fi;
+        if [[ "$curPhase" = distPhase && -z "${doDist:-}" ]]; then
+            continue;
+        fi;
+        if [[ -n $NIX_LOG_FD ]]; then
+            echo "@nix { \"action\": \"setPhase\", \"phase\": \"$curPhase\" }" 1>&$NIX_LOG_FD;
+        fi;
+        showPhaseHeader "$curPhase";
+        dumpVars;
+        eval "${!curPhase:-$curPhase}";
+        if [ "$curPhase" = unpackPhase ]; then
+            cd "${sourceRoot:-.}";
+        fi;
+    done
+}
+getHostRole () 
+{ 
+    getRole "$hostOffset"
+}
+getHostRoleEnvHook () 
+{ 
+    getRole "$depHostOffset"
+}
+getRole () 
+{ 
+    case $1 in 
+        -1)
+            role_pre='BUILD_';
+            role_post='_FOR_BUILD'
+        ;;
+        0)
+            role_pre='';
+            role_post=''
+        ;;
+        1)
+            role_pre='TARGET_';
+            role_post='_FOR_TARGET'
+        ;;
+        *)
+            echo "binutils-wrapper-2.31.1: used as improper sort of dependency" > 2;
+            return 1
+        ;;
+    esac
+}
+getTargetRole () 
+{ 
+    getRole "$targetOffset"
+}
+getTargetRoleEnvHook () 
+{ 
+    getRole "$depTargetOffset"
+}
+getTargetRoleWrapper () 
+{ 
+    case $targetOffset in 
+        -1)
+            export NIX_BINTOOLS_WRAPPER_x86_64_unknown_linux_gnu_TARGET_BUILD=1
+        ;;
+        0)
+            export NIX_BINTOOLS_WRAPPER_x86_64_unknown_linux_gnu_TARGET_HOST=1
+        ;;
+        1)
+            export NIX_BINTOOLS_WRAPPER_x86_64_unknown_linux_gnu_TARGET_TARGET=1
+        ;;
+        *)
+            echo "binutils-wrapper-2.31.1: used as improper sort of dependency" > 2;
+            return 1
+        ;;
+    esac
+}
+header () 
+{ 
+    echo "$1"
+}
+installCheckPhase () 
+{ 
+    runHook preInstallCheck;
+    if [[ -z "${foundMakefile:-}" ]]; then
+        echo "no Makefile or custom buildPhase, doing nothing";
+    else
+        if [[ -z "${installCheckTarget:-}" ]] && ! make -n ${makefile:+-f $makefile} ${installCheckTarget:-installcheck} > /dev/null 2>&1; then
+            echo "no installcheck target in ${makefile:-Makefile}, doing nothing";
+        else
+            local flagsArray=(${enableParallelChecking:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} SHELL=$SHELL $makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"} $installCheckFlags ${installCheckFlagsArray+"${installCheckFlagsArray[@]}"} ${installCheckTarget:-installcheck});
+            echoCmd 'installcheck flags' "${flagsArray[@]}";
+            make ${makefile:+-f $makefile} "${flagsArray[@]}";
+            unset flagsArray;
+        fi;
+    fi;
+    runHook postInstallCheck
+}
+installPhase () 
+{ 
+    runHook preInstall;
+    if [ -n "$prefix" ]; then
+        mkdir -p "$prefix";
+    fi;
+    local flagsArray=(SHELL=$SHELL $makeFlags ${makeFlagsArray+"${makeFlagsArray[@]}"} $installFlags ${installFlagsArray+"${installFlagsArray[@]}"} ${installTargets:-install});
+    echoCmd 'install flags' "${flagsArray[@]}";
+    make ${makefile:+-f $makefile} "${flagsArray[@]}";
+    unset flagsArray;
+    runHook postInstall
+}
+isELF () 
+{ 
+    local fn="$1";
+    local fd;
+    local magic;
+    exec {fd}< "$fn";
+    read -r -n 4 -u "$fd" magic;
+    exec {fd}>&-;
+    if [ "$magic" = 'ELF' ]; then
+        return 0;
+    else
+        return 1;
+    fi
+}
+isScript () 
+{ 
+    local fn="$1";
+    local fd;
+    local magic;
+    exec {fd}< "$fn";
+    read -r -n 2 -u "$fd" magic;
+    exec {fd}>&-;
+    if [[ "$magic" =~ \#! ]]; then
+        return 0;
+    else
+        return 1;
+    fi
+}
+mapOffset () 
+{ 
+    local -ri inputOffset="$1";
+    if (( "$inputOffset" <= 0 )); then
+        local -ri outputOffset="$inputOffset + $hostOffset";
+    else
+        local -ri outputOffset="$inputOffset - 1 + $targetOffset";
+    fi;
+    mapOffsetResult="$outputOffset"
+}
+moveToOutput () 
+{ 
+    local patt="$1";
+    local dstOut="$2";
+    local output;
+    for output in $outputs;
+    do
+        if [ "${!output}" = "$dstOut" ]; then
+            continue;
+        fi;
+        local srcPath;
+        for srcPath in "${!output}"/$patt;
+        do
+            if [ ! -e "$srcPath" ] && [ ! -L "$srcPath" ]; then
+                continue;
+            fi;
+            if [ "$dstOut" = REMOVE ]; then
+                echo "Removing $srcPath";
+                rm -r "$srcPath";
+            else
+                local dstPath="$dstOut${srcPath#${!output}}";
+                echo "Moving $srcPath to $dstPath";
+                if [ -d "$dstPath" ] && [ -d "$srcPath" ]; then
+                    rmdir "$srcPath" --ignore-fail-on-non-empty;
+                    if [ -d "$srcPath" ]; then
+                        mv -t "$dstPath" "$srcPath"/*;
+                        rmdir "$srcPath";
+                    fi;
+                else
+                    mkdir -p "$(readlink -m "$dstPath/..")";
+                    mv "$srcPath" "$dstPath";
+                fi;
+            fi;
+            local srcParent="$(readlink -m "$srcPath/..")";
+            if rmdir "$srcParent"; then
+                echo "Removing empty $srcParent/ and (possibly) its parents";
+                rmdir -p --ignore-fail-on-non-empty "$(readlink -m "$srcParent/..")" 2> /dev/null || true;
+            fi;
+        done;
+    done
+}
+patchELF () 
+{ 
+    local dir="$1";
+    [ -e "$dir" ] || return 0;
+    header "shrinking RPATHs of ELF executables and libraries in $dir";
+    local i;
+    while IFS= read -r -d '' i; do
+        if [[ "$i" =~ .build-id ]]; then
+            continue;
+        fi;
+        if ! isELF "$i"; then
+            continue;
+        fi;
+        echo "shrinking $i";
+        patchelf --shrink-rpath "$i" || true;
+    done < <(find "$dir" -type f -print0);
+    stopNest
+}
+patchPhase () 
+{ 
+    runHook prePatch;
+    for i in ${patches:-};
+    do
+        header "applying patch $i" 3;
+        local uncompress=cat;
+        case "$i" in 
+            *.gz)
+                uncompress="gzip -d"
+            ;;
+            *.bz2)
+                uncompress="bzip2 -d"
+            ;;
+            *.xz)
+                uncompress="xz -d"
+            ;;
+            *.lzma)
+                uncompress="lzma -d"
+            ;;
+        esac;
+        $uncompress < "$i" 2>&1 | patch ${patchFlags:--p1};
+    done;
+    runHook postPatch
+}
+patchShebangs () 
+{ 
+    local pathName;
+    if [ "$1" = "--host" ]; then
+        pathName=HOST_PATH;
+        shift;
+    else
+        if [ "$1" = "--build" ]; then
+            pathName=PATH;
+            shift;
+        fi;
+    fi;
+    echo "patching script interpreter paths in $@";
+    local f;
+    local oldPath;
+    local newPath;
+    local arg0;
+    local args;
+    local oldInterpreterLine;
+    local newInterpreterLine;
+    if [ $# -eq 0 ]; then
+        echo "No arguments supplied to patchShebangs" > 0;
+        return 0;
+    fi;
+    local f;
+    while IFS= read -r -d '' f; do
+        isScript "$f" || continue;
+        oldInterpreterLine=$(head -1 "$f" | tail -c+3);
+        read -r oldPath arg0 args <<< "$oldInterpreterLine";
+        if [ -z "$pathName" ]; then
+            if [ -n "$strictDeps" ] && [[ "$f" = "$NIX_STORE"* ]]; then
+                pathName=HOST_PATH;
+            else
+                pathName=PATH;
+            fi;
+        fi;
+        if $(echo "$oldPath" | grep -q "/bin/env$"); then
+            if $(echo "$arg0" | grep -q -- "^-.*\|.*=.*"); then
+                echo "$f: unsupported interpreter directive \"$oldInterpreterLine\" (set dontPatchShebangs=1 and handle shebang patching yourself)" > 0;
+                exit 1;
+            fi;
+            newPath="$(PATH="${!pathName}" command -v "$arg0" || true)";
+        else
+            if [ "$oldPath" = "" ]; then
+                oldPath="/bin/sh";
+            fi;
+            newPath="$(PATH="${!pathName}" command -v "$(basename "$oldPath")" || true)";
+            args="$arg0 $args";
+        fi;
+        newInterpreterLine="$(echo "$newPath $args" | sed 's/[[:space:]]*$//')";
+        if [ -n "$oldPath" -a "${oldPath:0:${#NIX_STORE}}" != "$NIX_STORE" ]; then
+            if [ -n "$newPath" -a "$newPath" != "$oldPath" ]; then
+                echo "$f: interpreter directive changed from \"$oldInterpreterLine\" to \"$newInterpreterLine\"";
+                escapedInterpreterLine=$(echo "$newInterpreterLine" | sed 's|\\|\\\\|g');
+                timestamp=$(mktemp);
+                touch -r "$f" "$timestamp";
+                sed -i -e "1 s|.*|#\!$escapedInterpreterLine|" "$f";
+                touch -r "$timestamp" "$f";
+                rm "$timestamp";
+            fi;
+        fi;
+    done < <(find "$@" -type f -perm -0100 -print0);
+    stopNest
+}
+patchShebangsAuto () 
+{ 
+    if [ -z "${dontPatchShebangs-}" -a -e "$prefix" ]; then
+        if [ "$output" != out ] && [ "$output" = "$outputDev" ]; then
+            patchShebangs --build "$prefix";
+        else
+            patchShebangs --host "$prefix";
+        fi;
+    fi
+}
+printLines () 
+{ 
+    (( "$#" > 0 )) || return 0;
+    printf '%s\n' "$@"
+}
+printWords () 
+{ 
+    (( "$#" > 0 )) || return 0;
+    printf '%s ' "$@"
+}
+runHook () 
+{ 
+    local hookName="$1";
+    shift;
+    local hooksSlice="${hookName%Hook}Hooks[@]";
+    local hook;
+    for hook in "_callImplicitHook 0 $hookName" ${!hooksSlice+"${!hooksSlice}"};
+    do
+        _eval "$hook" "$@";
+    done;
+    return 0
+}
+runOneHook () 
+{ 
+    local hookName="$1";
+    shift;
+    local hooksSlice="${hookName%Hook}Hooks[@]";
+    local hook ret=1;
+    for hook in "_callImplicitHook 1 $hookName" ${!hooksSlice+"${!hooksSlice}"};
+    do
+        if _eval "$hook" "$@"; then
+            ret=0;
+            break;
+        fi;
+    done;
+    return "$ret"
+}
+showPhaseHeader () 
+{ 
+    local phase="$1";
+    case "$phase" in 
+        unpackPhase)
+            header "unpacking sources"
+        ;;
+        patchPhase)
+            header "patching sources"
+        ;;
+        configurePhase)
+            header "configuring"
+        ;;
+        buildPhase)
+            header "building"
+        ;;
+        checkPhase)
+            header "running tests"
+        ;;
+        installPhase)
+            header "installing"
+        ;;
+        fixupPhase)
+            header "post-installation fixup"
+        ;;
+        installCheckPhase)
+            header "running install tests"
+        ;;
+        *)
+            header "$phase"
+        ;;
+    esac
+}
+stopNest () 
+{ 
+    true
+}
+stripDirs () 
+{ 
+    local cmd="$1";
+    local dirs="$2";
+    local stripFlags="$3";
+    local dirsNew=;
+    local d;
+    for d in ${dirs};
+    do
+        if [ -d "$prefix/$d" ]; then
+            dirsNew="${dirsNew} $prefix/$d ";
+        fi;
+    done;
+    dirs=${dirsNew};
+    if [ -n "${dirs}" ]; then
+        header "stripping (with command $cmd and flags $stripFlags) in$dirs";
+        find $dirs -type f -print0 | xargs -0 ${xargsFlags:--r} $cmd $commonStripFlags $stripFlags 2> /dev/null || true;
+        stopNest;
+    fi
+}
+stripHash () 
+{ 
+    local strippedName casematchOpt=0;
+    strippedName="$(basename -- "$1")";
+    shopt -q nocasematch && casematchOpt=1;
+    shopt -u nocasematch;
+    if [[ "$strippedName" =~ ^[a-z0-9]{32}- ]]; then
+        echo "${strippedName:33}";
+    else
+        echo "$strippedName";
+    fi;
+    if (( casematchOpt )); then
+        shopt -s nocasematch;
+    fi
+}
+substitute () 
+{ 
+    local input="$1";
+    local output="$2";
+    shift 2;
+    if [ ! -f "$input" ]; then
+        echo "substitute(): ERROR: file '$input' does not exist" 1>&2;
+        return 1;
+    fi;
+    local content;
+    consumeEntire content < "$input";
+    if [ -e "$output" ]; then
+        chmod +w "$output";
+    fi;
+    substituteStream content "file '$input'" "$@" > "$output"
+}
+substituteAll () 
+{ 
+    local input="$1";
+    local output="$2";
+    local -a args=();
+    _allFlags;
+    substitute "$input" "$output" "${args[@]}"
+}
+substituteAllInPlace () 
+{ 
+    local fileName="$1";
+    shift;
+    substituteAll "$fileName" "$fileName" "$@"
+}
+substituteAllStream () 
+{ 
+    local -a args=();
+    _allFlags;
+    substituteStream "$1" "$2" "${args[@]}"
+}
+substituteInPlace () 
+{ 
+    local fileName="$1";
+    shift;
+    substitute "$fileName" "$fileName" "$@"
+}
+substituteStream () 
+{ 
+    local var=$1;
+    local description=$2;
+    shift 2;
+    while (( "$#" )); do
+        case "$1" in 
+            --replace)
+                pattern="$2";
+                replacement="$3";
+                shift 3;
+                local savedvar;
+                savedvar="${!var}";
+                eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}';
+                if [ "$pattern" != "$replacement" ]; then
+                    if [ "${!var}" == "$savedvar" ]; then
+                        echo "substituteStream(): WARNING: pattern '$pattern' doesn't match anything in $description" 1>&2;
+                    fi;
+                fi
+            ;;
+            --subst-var)
+                local varName="$2";
+                shift 2;
+                if ! [[ "$varName" =~ ^[a-zA-Z_][a-zA-Z0-9_]*$ ]]; then
+                    echo "substituteStream(): ERROR: substitution variables must be valid Bash names, \"$varName\" isn't." 1>&2;
+                    return 1;
+                fi;
+                if [ -z ${!varName+x} ]; then
+                    echo "substituteStream(): ERROR: variable \$$varName is unset" 1>&2;
+                    return 1;
+                fi;
+                pattern="@$varName@";
+                replacement="${!varName}";
+                eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}'
+            ;;
+            --subst-var-by)
+                pattern="@$2@";
+                replacement="$3";
+                eval "$var"'=${'"$var"'//"$pattern"/"$replacement"}';
+                shift 3
+            ;;
+            *)
+                echo "substituteStream(): ERROR: Invalid command line argument: $1" 1>&2;
+                return 1
+            ;;
+        esac;
+    done;
+    printf "%s" "${!var}"
+}
+unpackFile () 
+{ 
+    curSrc="$1";
+    header "unpacking source archive $curSrc" 3;
+    if ! runOneHook unpackCmd "$curSrc"; then
+        echo "do not know how to unpack source archive $curSrc";
+        exit 1;
+    fi
+}
+unpackPhase () 
+{ 
+    runHook preUnpack;
+    if [ -z "${srcs:-}" ]; then
+        if [ -z "${src:-}" ]; then
+            echo 'variable $src or $srcs should point to the source';
+            exit 1;
+        fi;
+        srcs="$src";
+    fi;
+    local dirsBefore="";
+    for i in *;
+    do
+        if [ -d "$i" ]; then
+            dirsBefore="$dirsBefore $i ";
+        fi;
+    done;
+    for i in $srcs;
+    do
+        unpackFile "$i";
+    done;
+    : ${sourceRoot=};
+    if [ -n "${setSourceRoot:-}" ]; then
+        runOneHook setSourceRoot;
+    else
+        if [ -z "$sourceRoot" ]; then
+            for i in *;
+            do
+                if [ -d "$i" ]; then
+                    case $dirsBefore in 
+                        *\ $i\ *)
+
+                        ;;
+                        *)
+                            if [ -n "$sourceRoot" ]; then
+                                echo "unpacker produced multiple directories";
+                                exit 1;
+                            fi;
+                            sourceRoot="$i"
+                        ;;
+                    esac;
+                fi;
+            done;
+        fi;
+    fi;
+    if [ -z "$sourceRoot" ]; then
+        echo "unpacker appears to have produced no directories";
+        exit 1;
+    fi;
+    echo "source root is $sourceRoot";
+    if [ "${dontMakeSourcesWritable:-0}" != 1 ]; then
+        chmod -R u+w -- "$sourceRoot";
+    fi;
+    runHook postUnpack
+}
+updateSourceDateEpoch () 
+{ 
+    local path="$1";
+    local -a res=($(find "$path" -type f -not -newer "$NIX_BUILD_TOP/.." -printf '%T@ %p\0'                     | sort -n --zero-terminated | tail -n1 --zero-terminated | head -c -1));
+    local time="${res[0]//\.[0-9]*/}";
+    local newestFile="${res[1]}";
+    if [ "${time:-0}" -gt "$SOURCE_DATE_EPOCH" ]; then
+        echo "setting SOURCE_DATE_EPOCH to timestamp $time of file $newestFile";
+        export SOURCE_DATE_EPOCH="$time";
+        local now="$(date +%s)";
+        if [ "$time" -gt $((now - 60)) ]; then
+            echo "warning: file $newestFile may be generated; SOURCE_DATE_EPOCH may be non-deterministic";
+        fi;
+    fi
+}
+
+export NIX_BUILD_TOP="$(mktemp -d --tmpdir nix-shell.XXXXXX)"
+export TMP="$NIX_BUILD_TOP"
+export TMPDIR="$NIX_BUILD_TOP"
+export TEMP="$NIX_BUILD_TOP"
+export TEMPDIR="$NIX_BUILD_TOP"
+eval "$shellHook"
diff --git a/frontend/elm-stuff/0.19.1/Cart.elmi b/frontend/elm-stuff/0.19.1/Cart.elmi
new file mode 100644
index 0000000..60bb740
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Cart.elmi
diff --git a/frontend/elm-stuff/0.19.1/Cart.elmo b/frontend/elm-stuff/0.19.1/Cart.elmo
new file mode 100644
index 0000000..0500a15
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Cart.elmo
diff --git a/frontend/elm-stuff/0.19.1/Catalog.elmi b/frontend/elm-stuff/0.19.1/Catalog.elmi
new file mode 100644
index 0000000..0610f11
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Catalog.elmi
diff --git a/frontend/elm-stuff/0.19.1/Catalog.elmo b/frontend/elm-stuff/0.19.1/Catalog.elmo
new file mode 100644
index 0000000..c5146fc
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Catalog.elmo
diff --git a/frontend/elm-stuff/0.19.1/Login.elmi b/frontend/elm-stuff/0.19.1/Login.elmi
new file mode 100644
index 0000000..75c4629
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Login.elmi
diff --git a/frontend/elm-stuff/0.19.1/Login.elmo b/frontend/elm-stuff/0.19.1/Login.elmo
new file mode 100644
index 0000000..9a173e3
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Login.elmo
diff --git a/frontend/elm-stuff/0.19.1/Main.elmi b/frontend/elm-stuff/0.19.1/Main.elmi
new file mode 100644
index 0000000..295ad17
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Main.elmi
diff --git a/frontend/elm-stuff/0.19.1/Main.elmo b/frontend/elm-stuff/0.19.1/Main.elmo
new file mode 100644
index 0000000..0dc3269
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Main.elmo
diff --git a/frontend/elm-stuff/0.19.1/Product.elmi b/frontend/elm-stuff/0.19.1/Product.elmi
new file mode 100644
index 0000000..396a174
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Product.elmi
diff --git a/frontend/elm-stuff/0.19.1/Product.elmo b/frontend/elm-stuff/0.19.1/Product.elmo
new file mode 100644
index 0000000..c387bed
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Product.elmo
diff --git a/frontend/elm-stuff/0.19.1/Signup.elmi b/frontend/elm-stuff/0.19.1/Signup.elmi
new file mode 100644
index 0000000..190d9de
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Signup.elmi
diff --git a/frontend/elm-stuff/0.19.1/Signup.elmo b/frontend/elm-stuff/0.19.1/Signup.elmo
new file mode 100644
index 0000000..bcdb43d
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/Signup.elmo
diff --git a/frontend/elm-stuff/0.19.1/d.dat b/frontend/elm-stuff/0.19.1/d.dat
new file mode 100644
index 0000000..244afff
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/d.dat
diff --git a/frontend/elm-stuff/0.19.1/i.dat b/frontend/elm-stuff/0.19.1/i.dat
new file mode 100644
index 0000000..d1d1ac1
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/i.dat
diff --git a/frontend/elm-stuff/0.19.1/lock b/frontend/elm-stuff/0.19.1/lock
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/lock
diff --git a/frontend/elm-stuff/0.19.1/o.dat b/frontend/elm-stuff/0.19.1/o.dat
new file mode 100644
index 0000000..f25f55b
--- /dev/null
+++ b/frontend/elm-stuff/0.19.1/o.dat
diff --git a/frontend/elm.json b/frontend/elm.json
new file mode 100644
index 0000000..64ee788
--- /dev/null
+++ b/frontend/elm.json
@@ -0,0 +1,27 @@
+{
+    "type": "application",
+    "source-directories": [
+        "src"
+    ],
+    "elm-version": "0.19.1",
+    "dependencies": {
+        "direct": {
+            "elm/browser": "1.0.2",
+            "elm/core": "1.0.5",
+            "elm/html": "1.0.0",
+            "elm/http": "2.0.0",
+            "elm/json": "1.1.3",
+            "elm/url": "1.0.0"
+        },
+        "indirect": {
+            "elm/bytes": "1.0.8",
+            "elm/file": "1.0.5",
+            "elm/time": "1.0.0",
+            "elm/virtual-dom": "1.0.2"
+        }
+    },
+    "test-dependencies": {
+        "direct": {},
+        "indirect": {}
+    }
+}
diff --git a/frontend/src/Cart.elm b/frontend/src/Cart.elm
new file mode 100644
index 0000000..a1750f6
--- /dev/null
+++ b/frontend/src/Cart.elm
@@ -0,0 +1,164 @@
+module Cart exposing (..)
+
+import Browser
+import Browser.Navigation as Nav
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Decode as D
+import Json.Encode as Encode
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+type alias Product =
+    { id : Int
+    , name : String
+    , kind : Maybe String
+    , price : Float
+    , description : Maybe String
+    }
+
+
+type alias Model =
+    { pageStatus : Status
+    , products : List Product
+    }
+
+
+type Status
+    = Loading
+    | Loaded
+    | NotLoaded
+
+
+type Msg
+    = CartLoaded (Result Http.Error (List Product))
+    | FetchCartItems
+    | RemoveFromCart Int
+    | CartItemRemoved (Result Http.Error ())
+
+
+init : Model
+init =
+    Model NotLoaded []
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        CartLoaded res ->
+            case res of
+                Ok s ->
+                    ( { model | products = s, pageStatus = Loaded }, Cmd.none )
+
+                Err e ->
+                    let
+                        _ =
+                            Debug.log "error" e
+                    in
+                    ( { model | pageStatus = NotLoaded }, Cmd.none )
+
+        RemoveFromCart id ->
+            ( model, removeProduct id )
+
+        CartItemRemoved _ ->
+            ( { model | pageStatus = Loading }, fetchCartItems )
+
+        FetchCartItems ->
+            ( { model | pageStatus = Loading }, fetchCartItems )
+
+
+decodeProduct : D.Decoder Product
+decodeProduct =
+    D.map5 Product
+        (D.field "id" D.int)
+        (D.field "name" D.string)
+        (D.field "kind" (D.nullable D.string))
+        (D.field "price" D.float)
+        (D.field "description" (D.nullable D.string))
+
+
+decodeResponse : D.Decoder (List Product)
+decodeResponse =
+    D.list decodeProduct
+
+
+removeProduct : Int -> Cmd Msg
+removeProduct id =
+    let
+        _ =
+            Debug.log "cart" "fetching cart items"
+    in
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/cart/remove"
+        , body = Http.stringBody "application/json" <| String.fromInt id
+        , expect = Http.expectWhatever CartItemRemoved
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+fetchCartItems : Cmd Msg
+fetchCartItems =
+    let
+        _ =
+            Debug.log "cart" "fetching cart items"
+    in
+    Http.riskyRequest
+        { method = "GET"
+        , headers = []
+        , url = "http://127.0.0.1:7878/cart/items"
+        , body = Http.emptyBody
+        , expect = Http.expectJson CartLoaded decodeResponse
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+viewStatus : Status -> String
+viewStatus s =
+    case s of
+        Loading ->
+            "Loading"
+
+        Loaded ->
+            "Ready!"
+
+        NotLoaded ->
+            "Not loaded ..."
+
+
+viewProduct : Product -> Html Msg
+viewProduct p =
+    div []
+        [ text p.name
+        , div [] [ text <| Maybe.withDefault "" p.kind ]
+        , div [] [ text <| Maybe.withDefault "" p.description ]
+        , div [] [ text <| String.fromFloat p.price ]
+        , div [] [ button [ onClick (RemoveFromCart p.id) ] [ text "Remove" ] ]
+        , div [] [ a [ href ("/product/" ++ String.fromInt p.id) ] [ text "View Product" ] ]
+        ]
+
+
+view : Model -> Html Msg
+view model =
+    case model.pageStatus of
+        Loading ->
+            div [] [ text <| viewStatus Loading ]
+
+        _ ->
+            div []
+                [ let
+                    cart =
+                        List.map viewProduct model.products
+                  in
+                  if List.isEmpty cart then
+                    text "No items in cart"
+
+                  else
+                    ul [] cart
+                ]
diff --git a/frontend/src/Catalog.elm b/frontend/src/Catalog.elm
new file mode 100644
index 0000000..80e5e38
--- /dev/null
+++ b/frontend/src/Catalog.elm
@@ -0,0 +1,125 @@
+module Catalog exposing (..)
+
+import Browser
+import Browser.Navigation as Nav
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Decode as D
+import Json.Encode as Encode
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+type alias Product =
+    { id : Int
+    , name : String
+    , kind : Maybe String
+    , price : Float
+    , description : Maybe String
+    }
+
+
+type alias Model =
+    { pageStatus : Status
+    , products : List Product
+    }
+
+
+type Status
+    = Loading
+    | Loaded
+    | NotLoaded
+
+
+type Msg
+    = ProductsLoaded (Result Http.Error (List Product))
+    | FetchProducts
+
+
+init : Model
+init =
+    Model NotLoaded []
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        ProductsLoaded res ->
+            case res of
+                Ok s ->
+                    ( { model | products = s, pageStatus = Loaded }, Cmd.none )
+
+                Err e ->
+                    let
+                        _ =
+                            Debug.log "error" e
+                    in
+                    ( { model | pageStatus = NotLoaded }, Cmd.none )
+
+        FetchProducts ->
+            ( { model | pageStatus = Loading }, fetchProducts )
+
+
+decodeProduct : D.Decoder Product
+decodeProduct =
+    D.map5 Product
+        (D.field "id" D.int)
+        (D.field "name" D.string)
+        (D.field "kind" (D.nullable D.string))
+        (D.field "price" D.float)
+        (D.field "description" (D.nullable D.string))
+
+
+decodeResponse : D.Decoder (List Product)
+decodeResponse =
+    D.list decodeProduct
+
+
+fetchProducts : Cmd Msg
+fetchProducts =
+    let
+        _ =
+            Debug.log "err" "fetching products"
+    in
+    Http.get
+        { url = "http://127.0.0.1:7878/product/catalog"
+        , expect = Http.expectJson ProductsLoaded decodeResponse
+        }
+
+
+viewStatus : Status -> String
+viewStatus s =
+    case s of
+        Loading ->
+            "Loading"
+
+        Loaded ->
+            "Ready!"
+
+        NotLoaded ->
+            "Not loaded ..."
+
+
+viewProduct : Product -> Html Msg
+viewProduct p =
+    div []
+        [ text p.name
+        , text <| Maybe.withDefault "" p.kind
+        , text <| Maybe.withDefault "" p.description
+        , text <| String.fromFloat p.price
+        , a [ href ("/product/" ++ String.fromInt p.id) ] [ text "View Product" ]
+        ]
+
+
+view : Model -> Html Msg
+view model =
+    case model.pageStatus of
+        Loading ->
+            div [] [ text <| viewStatus Loading ]
+
+        _ ->
+            div []
+                [ ul [] (List.map viewProduct model.products)
+                ]
diff --git a/frontend/src/Login.elm b/frontend/src/Login.elm
new file mode 100644
index 0000000..dd168f0
--- /dev/null
+++ b/frontend/src/Login.elm
@@ -0,0 +1,119 @@
+module Login exposing (..)
+
+import Browser
+import Browser.Navigation as Nav
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Encode as Encode
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+type alias Model =
+    { username : String
+    , password : String
+    , loginStatus : LoginStatus
+    }
+
+
+type LoginStatus
+    = NotLoggedIn
+    | LoggedIn
+    | InvalidLogin
+    | LoggingIn
+
+
+type Msg
+    = PassEntered String
+    | UserEntered String
+    | LoginPressed
+    | LoginSuccess (Result Http.Error ())
+    | LoginFail
+
+
+init : Model
+init =
+    Model "" "" NotLoggedIn
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        PassEntered s ->
+            ( { model | password = s }
+            , Cmd.none
+            )
+
+        UserEntered s ->
+            ( { model | username = s }
+            , Cmd.none
+            )
+
+        LoginPressed ->
+            ( { model | loginStatus = LoggingIn }, tryLogin model )
+
+        LoginSuccess res ->
+            case res of
+                Ok s ->
+                    ( { model | loginStatus = LoggedIn }, Cmd.none )
+
+                Err e ->
+                    ( { model | loginStatus = InvalidLogin }, Cmd.none )
+
+        LoginFail ->
+            ( { model | loginStatus = InvalidLogin }, Cmd.none )
+
+
+encodeLogin : Model -> Encode.Value
+encodeLogin model =
+    Encode.object
+        [ ( "username", Encode.string model.username )
+        , ( "password", Encode.string model.password )
+        ]
+
+
+tryLogin : Model -> Cmd Msg
+tryLogin model =
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/user/login"
+        , body = model |> encodeLogin |> Http.jsonBody
+        , expect = Http.expectWhatever LoginSuccess
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+viewStatus : LoginStatus -> String
+viewStatus ls =
+    case ls of
+        NotLoggedIn ->
+            "Not Logged In"
+
+        InvalidLogin ->
+            "Invalid Login"
+
+        LoggedIn ->
+            "Logged in!"
+
+        LoggingIn ->
+            "Logging In ..."
+
+
+viewInput : String -> String -> String -> (String -> msg) -> Html msg
+viewInput t p v toMsg =
+    input [ type_ t, placeholder p, value v, onInput toMsg ] []
+
+
+view : Model -> Html Msg
+view model =
+    div []
+        [ div [] [ viewInput "text" "Enter name here" model.username UserEntered ]
+        , div [] [ viewInput "password" "Password" model.password PassEntered ]
+        , div [] [ button [ onClick LoginPressed ] [ text "Login" ] ]
+        , div [] [ text (viewStatus model.loginStatus) ]
+        , div [] [ text "Don't have an account? ", a [ href "/signup" ] [ text "Register now!" ] ]
+        ]
diff --git a/frontend/src/Main.elm b/frontend/src/Main.elm
new file mode 100644
index 0000000..bf1583c
--- /dev/null
+++ b/frontend/src/Main.elm
@@ -0,0 +1,339 @@
+module Main exposing (Model, Msg(..), init, main, subscriptions, update, view, viewLink)
+
+import Browser
+import Browser.Navigation as Nav
+import Cart
+import Catalog
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Encode as Encode
+import Login
+import Product
+import Signup
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+
+-- MAIN
+
+
+main : Program () Model Msg
+main =
+    Browser.application
+        { init = init
+        , view = view
+        , update = update
+        , subscriptions = subscriptions
+        , onUrlChange = UrlChanged
+        , onUrlRequest = LinkClicked
+        }
+
+
+
+-- MODEL
+
+
+type Route
+    = LoginPage
+    | SignupPage
+    | HomePage
+    | CatalogPage
+    | CartPage
+    | ProductPage Int
+    | NotFoundPage
+
+
+parseRoute : Parser (Route -> a) a
+parseRoute =
+    oneOf
+        [ P.map LoginPage (P.s "login")
+        , P.map HomePage P.top
+        , P.map CatalogPage (P.s "catalog")
+        , P.map CartPage (P.s "cart")
+        , P.map SignupPage (P.s "signup")
+        , P.map ProductPage (P.s "product" </> P.int)
+
+        --, P.map ProductPage (P.s "product" </> int)
+        ]
+
+
+type alias Model =
+    { key : Nav.Key
+    , url : Url.Url
+    , location : Route
+    , loginModel : Login.Model
+    , catalogModel : Catalog.Model
+    , productModel : Product.Model
+    , signupModel : Signup.Model
+    , cartModel : Cart.Model
+    }
+
+
+init : () -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
+init flags url key =
+    let
+        start =
+            HomePage
+
+        login =
+            Login.init
+
+        catalog =
+            Catalog.init
+
+        product =
+            Product.init
+
+        signup =
+            Signup.init
+
+        cart =
+            Cart.init
+    in
+    ( Model key url start login catalog product signup cart, Cmd.none )
+
+
+
+-- UPDATE
+
+
+type Msg
+    = LinkClicked Browser.UrlRequest
+    | UrlChanged Url.Url
+    | LoginMessage Login.Msg
+    | CatalogMessage Catalog.Msg
+    | ProductMessage Product.Msg
+    | SignupMessage Signup.Msg
+    | CartMessage Cart.Msg
+    | LogoutPressed
+    | LogoutSuccess (Result Http.Error ())
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        LinkClicked urlRequest ->
+            case urlRequest of
+                Browser.Internal url ->
+                    ( model, Nav.pushUrl model.key (Url.toString url) )
+
+                Browser.External href ->
+                    ( model, Nav.load href )
+
+        LogoutPressed ->
+            ( model, tryLogout )
+
+        LogoutSuccess _ ->
+            ( model, Nav.replaceUrl model.key "/login" )
+
+        UrlChanged url ->
+            let
+                parsedUrl =
+                    P.parse parseRoute url
+            in
+            case parsedUrl of
+                Just CatalogPage ->
+                    ( { model | location = CatalogPage }, Cmd.map CatalogMessage Catalog.fetchProducts )
+
+                Just (ProductPage id) ->
+                    let
+                        cmds =
+                            List.map (Cmd.map ProductMessage)
+                                [ Product.fetchListing id
+                                , Product.fetchRatings id
+                                ]
+                    in
+                    ( { model | location = ProductPage id }, Cmd.batch cmds )
+
+                Just CartPage ->
+                    let
+                        cmd =
+                            Cmd.map CartMessage Cart.fetchCartItems
+                    in
+                    ( { model | location = CartPage }, cmd )
+
+                Just p ->
+                    ( { model | location = p }, Cmd.none )
+
+                Nothing ->
+                    ( { model | location = NotFoundPage }, Cmd.none )
+
+        LoginMessage lm ->
+            let
+                ( lmn, cmd ) =
+                    Login.update lm model.loginModel
+
+                redir =
+                    case lmn.loginStatus of
+                        Login.LoggedIn ->
+                            Nav.replaceUrl model.key "/catalog"
+
+                        _ ->
+                            Cmd.none
+            in
+            ( { model | loginModel = lmn }, Cmd.batch [ Cmd.map LoginMessage cmd, redir ] )
+
+        SignupMessage sm ->
+            let
+                ( smn, cmd ) =
+                    Signup.update sm model.signupModel
+
+                redir =
+                    case smn.status of
+                        Signup.CreatedSuccessfully ->
+                            Nav.replaceUrl model.key "/login"
+
+                        _ ->
+                            Cmd.none
+            in
+            ( { model | signupModel = smn }, Cmd.batch [ Cmd.map SignupMessage cmd, redir ] )
+
+        CatalogMessage cm ->
+            let
+                ( cmn, cmd ) =
+                    Catalog.update cm model.catalogModel
+            in
+            ( { model | catalogModel = cmn }, Cmd.map CatalogMessage cmd )
+
+        CartMessage cm ->
+            let
+                ( cmn, cmd ) =
+                    Cart.update cm model.cartModel
+            in
+            ( { model | cartModel = cmn }, Cmd.map CartMessage cmd )
+
+        ProductMessage pm ->
+            let
+                ( pmn, cmd ) =
+                    Product.update pm model.productModel
+
+                redir =
+                    case pm of
+                        Product.AddToCartSuccess _ ->
+                            Nav.replaceUrl model.key "/cart"
+
+                        _ ->
+                            Cmd.none
+            in
+            ( { model | productModel = pmn }, Cmd.batch [ Cmd.map ProductMessage cmd, redir ] )
+
+
+tryLogout : Cmd Msg
+tryLogout =
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/user/logout"
+        , body = Http.emptyBody
+        , expect = Http.expectWhatever LogoutSuccess
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+
+-- SUBSCRIPTIONS
+
+
+subscriptions : Model -> Sub Msg
+subscriptions _ =
+    Sub.none
+
+
+
+-- VIEW
+
+
+view : Model -> Browser.Document Msg
+view model =
+    case model.location of
+        LoginPage ->
+            { title = "Login"
+            , body = [ Html.map LoginMessage (Login.view model.loginModel) ]
+            }
+
+        SignupPage ->
+            { title = "Signup"
+            , body = [ Html.map SignupMessage (Signup.view model.signupModel) ]
+            }
+
+        HomePage ->
+            { title = "URL Interceptor"
+            , body =
+                [ text "The current URL is: "
+                , b [] [ text (Url.toString model.url) ]
+                , ul []
+                    [ viewLink "/login"
+                    , viewLink "/catalog"
+                    , viewLink "/cart"
+                    , viewLink "/signup"
+                    ]
+                ]
+            }
+
+        NotFoundPage ->
+            { title = "404 - Not Found"
+            , body =
+                [ text "404 - Not Found"
+                , a [ href "/" ] [ text "Go back >" ]
+                ]
+            }
+
+        CatalogPage ->
+            { title = "Catalog"
+            , body = pageWrap model (Html.map CatalogMessage (Catalog.view model.catalogModel))
+            }
+
+        CartPage ->
+            { title = "Cart"
+            , body = pageWrap model (Html.map CartMessage (Cart.view model.cartModel))
+            }
+
+        ProductPage item ->
+            { title = "Product " ++ String.fromInt item
+            , body = pageWrap model (Html.map ProductMessage (Product.view model.productModel))
+            }
+
+
+viewHeader : Model -> Html Msg
+viewHeader model =
+    let
+        links =
+            [ ( "Home", "/" )
+            , ( "Catalog", "/catalog" )
+            , ( "Cart", "/cart" )
+            ]
+    in
+    div []
+        [ List.map
+            (\( name, loc ) ->
+                li []
+                    [ a [ href loc ] [ text name ]
+                    ]
+            )
+            links
+            ++ [ if model.loginModel.loginStatus /= Login.LoggedIn then
+                    li [] [ a [ href "/login" ] [ text "Login" ] ]
+
+                 else
+                    button [ onClick LogoutPressed ] [ text "Logout" ]
+               ]
+            |> ul []
+        ]
+
+
+pageWrap : Model -> Html Msg -> List (Html Msg)
+pageWrap model page =
+    [ div []
+        [ viewHeader model
+        , page
+        ]
+    ]
+
+
+viewLink : String -> Html msg
+viewLink path =
+    li [] [ a [ href path ] [ text path ] ]
diff --git a/frontend/src/Product.elm b/frontend/src/Product.elm
new file mode 100644
index 0000000..0ea0ce1
--- /dev/null
+++ b/frontend/src/Product.elm
@@ -0,0 +1,302 @@
+module Product exposing (..)
+
+import Browser
+import Browser.Navigation as Nav
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Decode as D
+import Json.Encode as Encode
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+type SubmitStatus
+    = SubmitSuccess
+    | SubmitFail
+    | Submitting
+    | NotSubmitted
+
+
+type alias Product =
+    { id : Int
+    , name : String
+    , kind : Maybe String
+    , price : Float
+    , description : Maybe String
+    }
+
+
+emptyProduct =
+    Product -1 "" Nothing 0 Nothing
+
+
+type alias Rating =
+    { commentDate : String
+    , commentText : Maybe String
+    , customerName : String
+    , productName : String
+    , stars : Int
+    }
+
+
+type alias Model =
+    { pageStatus : Status
+    , listing : Product
+    , ratings : List Rating
+    , ratingStars : Int
+    , ratingText : String
+    , addRatingStatus : SubmitStatus
+    }
+
+
+type Status
+    = Loading
+    | Loaded
+    | NotLoaded
+
+
+type Msg
+    = ListingLoaded (Result Http.Error Product)
+    | RatingsLoaded (Result Http.Error (List Rating))
+    | FetchProduct Int
+    | FetchRatings Int
+    | AddRatingStars Int
+    | AddRatingComment String
+    | AddRatingPressed
+    | AddRatingSuccess (Result Http.Error ())
+    | AddRatingFail
+    | AddToCartSuccess (Result Http.Error ())
+    | AddToCartPressed
+
+
+init : Model
+init =
+    Model NotLoaded emptyProduct [] 0 "" NotSubmitted
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        ListingLoaded res ->
+            case res of
+                Ok s ->
+                    ( { model | listing = s, pageStatus = Loaded }, Cmd.none )
+
+                Err e ->
+                    let
+                        _ =
+                            Debug.log "error" e
+                    in
+                    ( { model | pageStatus = NotLoaded }, Cmd.none )
+
+        RatingsLoaded res ->
+            case res of
+                Ok s ->
+                    ( { model | ratings = s, pageStatus = Loaded }, Cmd.none )
+
+                Err e ->
+                    let
+                        _ =
+                            Debug.log "error" e
+                    in
+                    ( { model | pageStatus = NotLoaded }, Cmd.none )
+
+        FetchProduct id ->
+            ( { model | pageStatus = Loading }, fetchListing id )
+
+        FetchRatings id ->
+            ( { model | pageStatus = Loading }, fetchRatings id )
+
+        AddRatingStars i ->
+            ( { model | ratingStars = i }, Cmd.none )
+
+        AddRatingComment s ->
+            ( { model | ratingText = s }, Cmd.none )
+
+        AddRatingPressed ->
+            ( { model | addRatingStatus = Submitting }
+            , submitRating model
+            )
+
+        AddRatingSuccess res ->
+            case res of
+                Ok _ ->
+                    ( { model | addRatingStatus = SubmitSuccess }, fetchRatings model.listing.id )
+
+                Err _ ->
+                    ( { model | addRatingStatus = SubmitFail }, Cmd.none )
+
+        AddRatingFail ->
+            ( { model | addRatingStatus = SubmitFail }, Cmd.none )
+
+        AddToCartPressed ->
+            ( model, addToCart model )
+
+        AddToCartSuccess _ ->
+            ( model, Cmd.none )
+
+
+decodeProduct : D.Decoder Product
+decodeProduct =
+    D.map5 Product
+        (D.field "id" D.int)
+        (D.field "name" D.string)
+        (D.field "kind" (D.nullable D.string))
+        (D.field "price" D.float)
+        (D.field "description" (D.nullable D.string))
+
+
+decodeRating : D.Decoder Rating
+decodeRating =
+    D.map5 Rating
+        (D.field "comment_date" D.string)
+        (D.field "comment_text" (D.nullable D.string))
+        (D.field "customer_name" D.string)
+        (D.field "product_name" D.string)
+        (D.field "stars" D.int)
+
+
+decodeRatings : D.Decoder (List Rating)
+decodeRatings =
+    D.list decodeRating
+
+
+fetchListing : Int -> Cmd Msg
+fetchListing id =
+    let
+        _ =
+            Debug.log "err" <| "fetching listing " ++ String.fromInt id
+    in
+    Http.get
+        { url = "http://127.0.0.1:7878/product/" ++ String.fromInt id
+        , expect = Http.expectJson ListingLoaded decodeProduct
+        }
+
+
+fetchRatings : Int -> Cmd Msg
+fetchRatings id =
+    let
+        _ =
+            Debug.log "err" <| "fetching ratings " ++ String.fromInt id
+    in
+    Http.get
+        { url = "http://127.0.0.1:7878/product/reviews/" ++ String.fromInt id
+        , expect = Http.expectJson RatingsLoaded decodeRatings
+        }
+
+
+encodeRatingForm : Model -> Encode.Value
+encodeRatingForm model =
+    Encode.object
+        [ ( "product_id", Encode.int model.listing.id )
+        , ( "stars", Encode.int model.ratingStars )
+        , ( "comment_text", Encode.string model.ratingText )
+        ]
+
+
+submitRating : Model -> Cmd Msg
+submitRating model =
+    let
+        _ =
+            Debug.log "err" <| "submitting rating for" ++ String.fromInt model.listing.id
+    in
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/rating/add"
+        , body = model |> encodeRatingForm |> Http.jsonBody
+        , expect = Http.expectWhatever AddRatingSuccess
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+addToCart : Model -> Cmd Msg
+addToCart model =
+    let
+        _ =
+            Debug.log "err" <| "adding to cart: " ++ String.fromInt model.listing.id
+    in
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/cart/add"
+        , body = Http.stringBody "applcation/json" <| String.fromInt <| model.listing.id
+        , expect = Http.expectWhatever AddToCartSuccess
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+viewStatus : Status -> String
+viewStatus s =
+    case s of
+        Loading ->
+            "Loading"
+
+        Loaded ->
+            "Ready!"
+
+        NotLoaded ->
+            "Not loaded ..."
+
+
+viewProduct : Product -> Html Msg
+viewProduct p =
+    div []
+        [ text p.name
+        , text <| Maybe.withDefault "" p.kind
+        , text <| Maybe.withDefault "" p.description
+        , text <| String.fromFloat p.price
+        ]
+
+
+viewRating : Rating -> Html Msg
+viewRating r =
+    div []
+        [ text <| r.customerName ++ " posted on "
+        , text <| r.commentDate ++ " "
+        , text <| Maybe.withDefault "" r.commentText
+        , text <| " Stars: " ++ String.fromInt r.stars
+        ]
+
+
+viewInput : String -> String -> String -> (String -> msg) -> Html msg
+viewInput t p v toMsg =
+    input [ type_ t, placeholder p, value v, onInput toMsg ] []
+
+
+viewStars : Html Msg
+viewStars =
+    ul []
+        (List.map
+            (\i -> button [ onClick (AddRatingStars i) ] [ text <| String.fromInt i ])
+            [ 0, 1, 2, 3, 4, 5 ]
+        )
+
+
+view : Model -> Html Msg
+view model =
+    case model.pageStatus of
+        Loading ->
+            div [] [ text <| viewStatus Loading ]
+
+        _ ->
+            div []
+                [ div [] [ viewProduct model.listing ]
+                , ul [] (List.map viewRating model.ratings)
+                , div [] [ text "Add Rating: " ]
+                , div []
+                    [ viewStars
+                    , viewInput "text" "Enter Comment Text" model.ratingText AddRatingComment
+                    , button [ onClick AddRatingPressed ] [ text "Submit Rating" ]
+                    ]
+                , div []
+                    [ button [ onClick AddToCartPressed ] [ text "Add To Cart" ]
+                    ]
+                , div []
+                    [ a [ href "/catalog" ] [ text "Back to catalog" ]
+                    ]
+                ]
diff --git a/frontend/src/Signup.elm b/frontend/src/Signup.elm
new file mode 100644
index 0000000..6395b57
--- /dev/null
+++ b/frontend/src/Signup.elm
@@ -0,0 +1,194 @@
+module Signup exposing (..)
+
+import Browser
+import Browser.Navigation as Nav
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Html.Events exposing (..)
+import Http
+import Json.Encode as Encode
+import Url
+import Url.Parser as P exposing ((</>), Parser, int, oneOf, s, string)
+
+
+type alias Model =
+    { username : String
+    , password : String
+    , phoneNumber : String
+    , emailId : String
+    , address : Maybe String
+    , status : Status
+    }
+
+
+type Status
+    = UsernameTaken
+    | InvalidPhone
+    | InvalidEmail
+    | CreatedSuccessfully
+    | CreatingUser
+    | Empty
+
+
+type Msg
+    = UserEntered String
+    | PassEntered String
+    | PhoneEntered String
+    | EmailEntered String
+    | AddressEntered String
+    | CreatePressed
+    | CreationSuccess (Result Http.Error ())
+    | UsernameExists (Result Http.Error String)
+    | CreationFail
+
+
+init : Model
+init =
+    Model "" "" "" "" Nothing Empty
+
+
+update : Msg -> Model -> ( Model, Cmd Msg )
+update msg model =
+    case msg of
+        UserEntered s ->
+            ( { model | username = s }
+            , Cmd.none
+            )
+
+        PassEntered s ->
+            ( { model | password = s }
+            , Cmd.none
+            )
+
+        PhoneEntered s ->
+            let
+                status =
+                    if String.length s /= 10 || (List.all (not << Char.isDigit) <| String.toList s) then
+                        InvalidPhone
+
+                    else
+                        Empty
+            in
+            ( { model | phoneNumber = s, status = status }
+            , Cmd.none
+            )
+
+        EmailEntered s ->
+            let
+                status =
+                    if not <| String.contains "@" s then
+                        InvalidEmail
+
+                    else
+                        Empty
+            in
+            ( { model | emailId = s, status = status }
+            , Cmd.none
+            )
+
+        AddressEntered s ->
+            ( { model | address = Just s }
+            , Cmd.none
+            )
+
+        CreatePressed ->
+            ( { model | status = CreatingUser }, checkExists model )
+
+        CreationSuccess res ->
+            case res of
+                Ok _ ->
+                    ( { model | status = CreatedSuccessfully }, Cmd.none )
+
+                Err _ ->
+                    ( model, Cmd.none )
+
+        CreationFail ->
+            ( init, Cmd.none )
+
+        UsernameExists res ->
+            case res of
+                Ok "true" ->
+                    ( { model | status = UsernameTaken }, Cmd.none )
+
+                Ok "false" ->
+                    let
+                        _ =
+                            Debug.log "signup" "Hit create user ..."
+                    in
+                    ( { model | status = CreatingUser }, createUser model )
+
+                _ ->
+                    ( model, Cmd.none )
+
+
+encodeCreateUser : Model -> Encode.Value
+encodeCreateUser model =
+    Encode.object
+        [ ( "username", Encode.string model.username )
+        , ( "password", Encode.string model.password )
+        , ( "phone_number", Encode.string model.phoneNumber )
+        , ( "email_id", Encode.string model.emailId )
+        , ( "address", Encode.string <| Maybe.withDefault "" model.address )
+        ]
+
+
+checkExists : Model -> Cmd Msg
+checkExists model =
+    Http.post
+        { url = "http://127.0.0.1:7878/user/existing"
+        , body = Http.stringBody "application/json" model.username
+        , expect = Http.expectString UsernameExists
+        }
+
+
+createUser : Model -> Cmd Msg
+createUser model =
+    Http.riskyRequest
+        { method = "POST"
+        , headers = []
+        , url = "http://127.0.0.1:7878/user/new"
+        , body = model |> encodeCreateUser |> Http.jsonBody
+        , expect = Http.expectWhatever CreationSuccess
+        , timeout = Nothing
+        , tracker = Nothing
+        }
+
+
+viewStatus : Status -> String
+viewStatus s =
+    case s of
+        UsernameTaken ->
+            "This username is taken!"
+
+        InvalidPhone ->
+            "Invalid phone number!"
+
+        InvalidEmail ->
+            "Invalid email address!"
+
+        CreatedSuccessfully ->
+            "User created successfully"
+
+        CreatingUser ->
+            "Creating user ..."
+
+        Empty ->
+            ""
+
+
+viewInput : String -> String -> String -> (String -> msg) -> Html msg
+viewInput t p v toMsg =
+    input [ type_ t, placeholder p, value v, onInput toMsg ] []
+
+
+view : Model -> Html Msg
+view model =
+    div []
+        [ viewInput "text" "Enter Username" model.username UserEntered
+        , viewInput "password" "Password" model.password PassEntered
+        , viewInput "text" "Email" model.emailId EmailEntered
+        , viewInput "text" "Enter your Phone number" model.phoneNumber PhoneEntered
+        , viewInput "text" "Enter Shipping address" (Maybe.withDefault "" model.address) AddressEntered
+        , button [ onClick CreatePressed ] [ text "Create" ]
+        , text (viewStatus model.status)
+        ]