1 files changed, 94 insertions, 0 deletions

diff --git a/src/habit/traits.rs b/src/habit/traits.rs
new file mode 100644
index 0000000..e28e55d
--- /dev/null
+++ b/src/habit/traits.rs
@@ -0,0 +1,94 @@
+use chrono::NaiveDate;
+use cursive::direction::Direction;
+use cursive::event::{Event, EventResult};
+use cursive::{Printer, Vec2};
+
+use typetag;
+
+use crate::habit::{Bit, Count, TrackEvent, ViewMode};
+use crate::views::ShadowView;
+
+pub trait Habit {
+    type HabitType;
+
+    fn set_name(&mut self, name: impl AsRef<str>);
+    fn set_goal(&mut self, goal: Self::HabitType);
+    fn name(&self) -> String;
+    fn get_by_date(&self, date: NaiveDate) -> Option<&Self::HabitType>;
+    fn insert_entry(&mut self, date: NaiveDate, val: Self::HabitType);
+    fn reached_goal(&self, date: NaiveDate) -> bool;
+    fn remaining(&self, date: NaiveDate) -> u32;
+    fn goal(&self) -> u32;
+    fn modify(&mut self, date: NaiveDate, event: TrackEvent);
+
+    fn set_view_month_offset(&mut self, offset: u32);
+    fn view_month_offset(&self) -> u32;
+
+    fn set_view_mode(&mut self, mode: ViewMode);
+    fn view_mode(&self) -> ViewMode;
+}
+
+#[typetag::serde(tag = "type")]
+pub trait HabitWrapper: erased_serde::Serialize {
+    fn remaining(&self, date: NaiveDate) -> u32;
+    fn goal(&self) -> u32;
+    fn modify(&mut self, date: NaiveDate, event: TrackEvent);
+    fn draw(&self, printer: &Printer);
+    fn on_event(&mut self, event: Event) -> EventResult;
+    fn required_size(&mut self, _: Vec2) -> Vec2;
+    fn take_focus(&mut self, _: Direction) -> bool;
+    fn get_name(&self) -> String;
+
+    fn set_view_month_offset(&mut self, offset: u32);
+    fn view_month_offset(&self) -> u32;
+
+    fn set_view_mode(&mut self, mode: ViewMode);
+    fn view_mode(&self) -> ViewMode;
+}
+
+macro_rules! auto_habit_impl {
+    ($struct_name:ident) => {
+        #[typetag::serde]
+        impl HabitWrapper for $struct_name {
+            fn remaining(&self, date: NaiveDate) -> u32 {
+                Habit::remaining(self, date)
+            }
+            fn goal(&self) -> u32 {
+                Habit::goal(self)
+            }
+            fn modify(&mut self, date: NaiveDate, event: TrackEvent) {
+                Habit::modify(self, date, event);
+            }
+            fn draw(&self, printer: &Printer) {
+                ShadowView::draw(self, printer)
+            }
+            fn on_event(&mut self, event: Event) -> EventResult {
+                ShadowView::on_event(self, event)
+            }
+            fn required_size(&mut self, x: Vec2) -> Vec2 {
+                ShadowView::required_size(self, x)
+            }
+            fn take_focus(&mut self, d: Direction) -> bool {
+                ShadowView::take_focus(self, d)
+            }
+            fn get_name(&self) -> String {
+                Habit::name(self)
+            }
+            fn set_view_month_offset(&mut self, offset: u32) {
+                Habit::set_view_month_offset(self, offset)
+            }
+            fn view_month_offset(&self) -> u32 {
+                Habit::view_month_offset(self)
+            }
+            fn set_view_mode(&mut self, mode: ViewMode) {
+                Habit::set_view_mode(self, mode)
+            }
+            fn view_mode(&self) -> ViewMode {
+                Habit::view_mode(self)
+            }
+        }
+    };
+}
+
+auto_habit_impl!(Count);
+auto_habit_impl!(Bit);