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|
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")
}
}
}
#[derive(Serialize, Debug)]
struct CatalogProduct {
pub id: i32,
pub name: String,
pub kind: Option<String>,
pub price: f32,
pub description: Option<String>,
pub average_rating: Option<f64>,
}
pub async fn get_all_products(pool: web::Data<TPool>) -> impl Responder {
let conn = pool.get().unwrap();
info!("Generating and returning catalog ...");
let product_entries = product
.load::<Product>(&conn)
.expect("Couldn't connect to DB");
let with_rating_avg = product_entries
.into_iter()
.map(move |p| {
let rating_list = rating::rating
.filter(rating::product_id.eq(p.id))
.load::<Rating>(&conn)
.expect("Coundn't connect to DB")
.into_iter()
.map(|r| r.stars)
.collect::<Vec<_>>();
let (rating_sum, total) =
rating_list.into_iter().fold((0, 0), |(s, t), x| match x {
Some(v) => (s + v, t + 1),
None => (s, t),
});
let average_rating = if total != 0 {
Some(rating_sum as f64 / total as f64)
} else {
None
};
CatalogProduct {
average_rating,
name: p.name,
kind: p.kind,
price: p.price,
description: p.description,
id: p.id,
}
})
.collect::<Vec<_>>();
return HttpResponse::Ok().json(&with_rating_avg);
}
#[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);
}
|
