From 9d2b6ee10ec5359cc91769d430485c8c869ba1a8 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Thu, 24 Dec 2020 10:51:40 +0530
Subject: monorepo

---
 backend/src/handlers/product.rs | 138 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 backend/src/handlers/product.rs

(limited to 'backend/src/handlers/product.rs')

diff --git a/backend/src/handlers/product.rs b/backend/src/handlers/product.rs
new file mode 100644
index 0000000..41a47a0
--- /dev/null
+++ b/backend/src/handlers/product.rs
@@ -0,0 +1,138 @@
+use crate::models::{Customer, NewProduct, Product, Rating, UpdateProduct};
+use crate::schema::customer::dsl as cust;
+use crate::schema::product::dsl::*;
+use crate::schema::rating::dsl as rating;
+use crate::TPool;
+
+use actix_web::{web, HttpResponse, Responder};
+use chrono::naive::NaiveDate;
+use diesel::prelude::*;
+use log::{error, info};
+use serde::{Deserialize, Serialize};
+
+pub async fn new_product(
+    pool: web::Data<TPool>,
+    item: web::Json<NewProduct>,
+) -> impl Responder {
+    info!("New product hit: {:?}", item.name);
+    let conn = pool.get().unwrap();
+    diesel::insert_into(product)
+        .values(item.into_inner())
+        .execute(&conn)
+        .expect("Coundn't connect to DB");
+    HttpResponse::Ok().body("Inserted successfully!")
+}
+
+pub async fn product_details(
+    pool: web::Data<TPool>,
+    product_id: web::Path<i32>,
+) -> impl Responder {
+    let conn = pool.get().unwrap();
+    let product_id = product_id.into_inner();
+    info!("Fetching product details for {}", product_id);
+    let selected_product = product
+        .filter(id.eq(&product_id))
+        .limit(1)
+        .first::<Product>(&conn);
+    match selected_product {
+        Ok(m) => {
+            info!("Found product: {}", product_id);
+            HttpResponse::Ok().json(m)
+        }
+        Err(_) => {
+            error!("Product not found: {}", product_id);
+            HttpResponse::NotFound().finish()
+        }
+    }
+}
+
+pub async fn update_product(
+    pool: web::Data<TPool>,
+    product_id: web::Path<i32>,
+    product_details: web::Json<UpdateProduct>,
+) -> impl Responder {
+    let conn = pool.get().unwrap();
+    let product_id = product_id.into_inner();
+    let product_details = product_details.into_inner();
+    info!("Updating product: {:?}", product_id);
+    match diesel::update(product.filter(id.eq(product_id)))
+        .set((
+            name.eq(product_details.name),
+            kind.eq(product_details.kind),
+            price.eq(product_details.price),
+            description.eq(product_details.description),
+        ))
+        .execute(&conn)
+    {
+        Ok(_) => {
+            return HttpResponse::Ok().body("Changed product successfully")
+        }
+        _ => {
+            return HttpResponse::InternalServerError()
+                .body("Unable to update record")
+        }
+    }
+}
+
+pub async fn get_all_products(pool: web::Data<TPool>) -> impl Responder {
+    let conn = pool.get().unwrap();
+    info!("Generating and returning catalog ...");
+    match product.load::<Product>(&conn) {
+        Ok(products) => return HttpResponse::Ok().json(&products),
+        Err(_) => {
+            return HttpResponse::InternalServerError()
+                .body("Unable to fetch product catalog")
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+struct ProductRating {
+    pub comment_text: Option<String>,
+    pub comment_date: NaiveDate,
+    pub product_name: String,
+    pub customer_name: String,
+    pub stars: Option<i32>,
+}
+
+pub async fn get_product_reviews(
+    pool: web::Data<TPool>,
+    product_id: web::Path<i32>,
+) -> impl Responder {
+    let conn = pool.get().unwrap();
+    info!("Fetching product reviews for {}", product_id);
+    let pid = product_id.into_inner();
+    let rating_entries = rating::rating
+        .filter(rating::product_id.eq(pid))
+        .load::<Rating>(&conn)
+        .expect("Couldn't connect to DB");
+    let json_ratings = rating_entries
+        .into_iter()
+        .map(move |p| {
+            let selected_product = product
+                .filter(id.eq(&p.product_id.unwrap()))
+                .limit(1)
+                .first::<Product>(&conn)
+                .unwrap()
+                .name
+                .clone();
+
+            let selected_customer = cust::customer
+                .filter(cust::id.eq(&p.customer_id.unwrap()))
+                .limit(1)
+                .first::<Customer>(&conn)
+                .unwrap()
+                .username
+                .clone();
+
+            ProductRating {
+                comment_text: p.comment_text,
+                comment_date: p.comment_date.unwrap(),
+                product_name: selected_product,
+                customer_name: selected_customer,
+                stars: p.stars,
+            }
+        })
+        .collect::<Vec<_>>();
+    return HttpResponse::Ok().json(&json_ratings);
+}
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