Бекэнд: вроде как готов, требуется рефакторинг

.gitignore

@@ -1,16 +1,13 @@
 # ---> Rust
 # Generated by Cargo
 # will have compiled files and executables
-debug/
-target/
-
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
+backend/debug/
+backend/target/
+backend/.env
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
 # MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
+backend/*.pdb
 

backend/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "backend"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+tokio = { version = "1", features = ["full"] }
+dotenv = "0.15"
+actix-web = "4"
+tokio-postgres = { version = "0.7.8", features = ["with-chrono-0_4"] }
+chrono = { version = "0.4.24", features = ["serde"] }
+serde_json = "1.0"
+serde = { version = "1.0.159", features = ["derive"] }
+async-trait = "0.1.68"
+dotenv_codegen = "0.15.0"

backend/src/endpoints/car.rs

@@ -0,0 +1,29 @@
+use std::sync::Mutex;
+use crate::models::car::*;
+use actix_web::{web, get, post, patch, delete, Responder, HttpResponse};
+use crate::State;
+
+#[get("/")]
+pub async fn get_cars(state: web::Data<Mutex<State>>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_repository.read_all().await.unwrap())
+}
+
+#[get("/{id}")]
+pub async fn get_car(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_repository.read(path.into_inner().0).await.unwrap())
+}
+
+#[post("/")]
+pub async fn create_car(state: web::Data<Mutex<State>>, json: web::Json<BindingCar>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_repository.create(json.0).await.unwrap())
+}
+
+#[patch("/{id}")]
+pub async fn update_car(state: web::Data<Mutex<State>>, json: web::Json<BindingCar>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_repository.update(path.into_inner().0, json.0).await.unwrap())
+}
+
+#[delete("/{id}")]
+pub async fn delete_car(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_repository.delete(path.into_inner().0).await.unwrap())
+}

backend/src/endpoints/car_station.rs

@@ -0,0 +1,29 @@
+use std::sync::Mutex;
+use crate::models::car_station::*;
+use actix_web::{web, get, post, patch, delete, Responder, HttpResponse};
+use crate::State;
+
+#[get("/")]
+pub async fn get_car_stations(state: web::Data<Mutex<State>>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_station_repository.read_all().await.unwrap())
+}
+
+#[get("/{id}")]
+pub async fn get_car_station(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_station_repository.read(path.into_inner().0).await.unwrap())
+}
+
+#[post("/")]
+pub async fn create_car_station(state: web::Data<Mutex<State>>, json: web::Json<BindingCarStation>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_station_repository.create(json.0).await.unwrap())
+}
+
+#[patch("/{id}")]
+pub async fn update_car_station(state: web::Data<Mutex<State>>, json: web::Json<BindingCarStation>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_station_repository.update(path.into_inner().0, json.0).await.unwrap())
+}
+
+#[delete("/{id}")]
+pub async fn delete_car_station(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().car_station_repository.delete(path.into_inner().0).await.unwrap())
+}

backend/src/endpoints/client.rs

@@ -0,0 +1,29 @@
+use std::sync::Mutex;
+use crate::models::client::*;
+use actix_web::{web, get, post, patch, delete, Responder, HttpResponse};
+use crate::State;
+
+#[get("/")]
+pub async fn get_clients(state: web::Data<Mutex<State>>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().client_repository.read_all().await.unwrap())
+}
+
+#[get("/{id}")]
+pub async fn get_client(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().client_repository.read(path.into_inner().0).await.unwrap())
+}
+
+#[post("/")]
+pub async fn create_client(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().client_repository.create(json.0).await.unwrap())
+}
+
+#[patch("/{id}")]
+pub async fn update_client(state: web::Data<Mutex<State>>, json: web::Json<BindingClient>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().client_repository.update(path.into_inner().0, json.0).await.unwrap())
+}
+
+#[delete("/{id}")]
+pub async fn delete_client(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().client_repository.delete(path.into_inner().0).await.unwrap())
+}

backend/src/endpoints/mod.rs

@@ -0,0 +1,4 @@
+pub mod client;
+pub mod car_station;
+pub mod car;
+pub mod rent;

backend/src/endpoints/rent.rs

@@ -0,0 +1,29 @@
+use std::sync::Mutex;
+use crate::models::rent::*;
+use actix_web::{web, get, post, patch, delete, Responder, HttpResponse};
+use crate::State;
+
+#[get("/")]
+pub async fn get_rents(state: web::Data<Mutex<State>>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().rent_repository.read_all().await.unwrap())
+}
+
+#[get("/{id}")]
+pub async fn get_rent(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().rent_repository.read(path.into_inner().0).await.unwrap())
+}
+
+#[post("/")]
+pub async fn create_rent(state: web::Data<Mutex<State>>, json: web::Json<BindingRent>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().rent_repository.create(json.0).await.unwrap())
+}
+
+#[patch("/{id}")]
+pub async fn update_rent(state: web::Data<Mutex<State>>, json: web::Json<BindingRent>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().rent_repository.update(path.into_inner().0, json.0).await.unwrap())
+}
+
+#[delete("/{id}")]
+pub async fn delete_rent(state: web::Data<Mutex<State>>, path: web::Path<(u32, )>) -> impl Responder {
+    HttpResponse::Ok().json(state.lock().unwrap().rent_repository.delete(path.into_inner().0).await.unwrap())
+}

backend/src/lib.rs

@@ -0,0 +1,12 @@
+use crate::storages::traits::{CarRepository, CarStationRepository, ClientRepository, RentRepository};
+
+pub mod endpoints;
+pub mod models;
+pub mod storages;
+
+pub struct State {
+    pub car_repository: Box<dyn CarRepository + Send>,
+    pub car_station_repository: Box<dyn CarStationRepository + Send>,
+    pub client_repository: Box<dyn ClientRepository + Send>,
+    pub rent_repository: Box<dyn RentRepository + Send>
+}

backend/src/main.rs

@@ -0,0 +1,85 @@
+use std::sync::{Arc, Mutex};
+use actix_web::{App, HttpServer, web};
+use actix_web::web::Data;
+use dotenv_codegen::dotenv;
+use backend::State;
+use tokio_postgres::NoTls;
+use backend::storages::postgres::car::PostgresCarRepository;
+use backend::storages::postgres::car_station::PostgresCarStationRepository;
+use backend::storages::postgres::client::PostgresClientRepository;
+use backend::storages::postgres::rent::PostgresRentRepository;
+use backend::endpoints::car_station::*;
+use backend::endpoints::car::*;
+use backend::endpoints::client::*;
+use backend::endpoints::rent::*;
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    let (client, connection) = tokio_postgres::connect(
+        &format!("host={} user={} password={} dbname={}", dotenv!("HOST"), dotenv!("USER"), dotenv!("PASSWORD"), dotenv!("DBNAME")),
+        NoTls
+    ).await.unwrap();
+
+    tokio::spawn(async move {
+        if let Err(e) = connection.await {
+            eprintln!("connection error: {}", e);
+        }
+    });
+
+    let client = Arc::new(client);
+
+    let car_repository = PostgresCarRepository { connection: Arc::clone(&client) };
+
+    let car_station_repository = PostgresCarStationRepository { connection: Arc::clone(&client) };
+
+    let client_repository = PostgresClientRepository { connection: Arc::clone(&client) };
+
+    let rent_repository = PostgresRentRepository { connection: Arc::clone(&client) };
+
+    let state = Data::new(Mutex::new(State {
+        car_repository: Box::new(car_repository),
+        car_station_repository: Box::new(car_station_repository),
+        client_repository: Box::new(client_repository),
+        rent_repository: Box::new(rent_repository)
+    }));
+
+    HttpServer::new(move || {
+        App::new()
+            .app_data(Data::clone(&state))
+            .service(
+                web::scope("/cars")
+                    .service(get_cars)
+                    .service(get_car)
+                    .service(create_car)
+                    .service(update_car)
+                    .service(delete_car)
+            )
+            .service(
+                web::scope("/clients")
+                    .service(get_clients)
+                    .service(get_client)
+                    .service(create_client)
+                    .service(update_client)
+                    .service(delete_client)
+            )
+            .service(
+                web::scope("/car_stations")
+                    .service(get_car_stations)
+                    .service(get_car_station)
+                    .service(create_car_station)
+                    .service(update_car_station)
+                    .service(delete_car_station)
+            )
+            .service(
+                web::scope("/rents")
+                    .service(get_rents)
+                    .service(get_rent)
+                    .service(create_rent)
+                    .service(update_rent)
+                    .service(delete_rent)
+            )
+    })
+        .bind("127.0.0.1:8080")?
+        .run()
+        .await
+}

backend/src/models/car.rs

@@ -0,0 +1,20 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Car {
+    pub id: i32,
+    pub brand: String,
+    pub model: String,
+    pub price: f64,
+    pub owner_id: i32,
+    pub car_station_id: i32
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BindingCar {
+    pub brand: String,
+    pub model: String,
+    pub price: f64,
+    pub owner_id: u32,
+    pub car_station_id: u32
+}

backend/src/models/car_station.rs

@@ -0,0 +1,12 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CarStation {
+    pub id: i32,
+    pub address: String
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BindingCarStation {
+    pub address: String
+}

backend/src/models/client.rs

@@ -0,0 +1,18 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Client {
+    pub id: i32,
+    pub name: String,
+    pub surname: String,
+    pub middlename: Option<String>,
+    pub phone: String
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BindingClient {
+    pub name: String,
+    pub surname: String,
+    pub middlename: Option<String>,
+    pub phone: String
+}

backend/src/models/mod.rs

@@ -0,0 +1,4 @@
+pub mod client;
+pub mod car_station;
+pub mod car;
+pub mod rent;

backend/src/models/rent.rs

@@ -0,0 +1,18 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Rent {
+    pub id: i32,
+    pub start_time: chrono::NaiveTime,
+    pub time_amount: Option<i32>,
+    pub client_id: i32,
+    pub car_id: i32
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BindingRent {
+    pub start_time: chrono::NaiveDateTime,
+    pub time_amount: Option<u32>,
+    pub client_id: u32,
+    pub car_id: u32
+}

backend/src/storages/mod.rs

@@ -0,0 +1,2 @@
+pub mod traits;
+pub mod postgres;

backend/src/storages/postgres/car.rs

@@ -0,0 +1,113 @@
+use tokio_postgres::Client as PgClient;
+use std::sync::Arc;
+use crate::models::car::{BindingCar, Car};
+use crate::storages::traits::CarRepository;
+use async_trait::async_trait;
+
+pub struct PostgresCarRepository {
+    pub connection: Arc<PgClient>
+}
+
+#[async_trait]
+impl CarRepository for PostgresCarRepository {
+    async fn create(&self, car: BindingCar) -> Result<Car, String> {
+        let result = self.connection.query(
+            "INSERT INTO Car(brand, model, price, owner_id, car_station_id) \
+            VALUES ($1, $2, $3, $4, $5) RETURNING *",
+            &[&car.brand, &car.model, &car.price, &car.owner_id, &car.car_station_id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(Car {
+                id: row.get("id"),
+                brand: row.get("brand"),
+                model: row.get("model"),
+                price: row.get("price"),
+                owner_id: row.get("owner_id"),
+                car_station_id: row.get("car_station_id")
+            })
+        } else {
+            Err("Something gone wrong during creation of Car".to_owned())
+        }
+    }
+
+    async fn read(&self, id: u32) -> Result<Car, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Car WHERE id = $1", &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).ok_or("Car not found".to_owned())?;
+            Ok(Car {
+                id: row.get("id"),
+                brand: row.get("brand"),
+                model: row.get("model"),
+                price: row.get("price"),
+                owner_id: row.get("owner_id"),
+                car_station_id: row.get("car_station_id")
+            })
+        } else {
+            Err("Something gone wrong during reading of Car".to_owned())
+        }
+    }
+
+    async fn read_all(&self) -> Result<Vec<Car>, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Car", &[]
+        ).await;
+
+        if let Ok(rows) = result {
+            Ok(
+                rows.into_iter().map(|r| Car {
+                    id: r.get("id"),
+                    brand: r.get("brand"),
+                    model: r.get("model"),
+                    price: r.get("price"),
+                    owner_id: r.get("owner_id"),
+                    car_station_id: r.get("car_station_id")
+                }).collect()
+            )
+        } else {
+            Err("Something gone wrong during reading CarStations".to_owned())
+        }
+    }
+
+    async fn update(&self, id: u32, car: BindingCar) -> Result<Car, String> {
+        let result = self.connection.query(
+            "UPDATE Car SET brand = $1, model = $2, price = $3, owner_id = $4, car_station_id = $5 WHERE id = $6 RETURNING *",
+            &[&car.brand, &car.model, &car.price, &car.owner_id, &car.car_station_id, &id]
+        ).await;
+
+        if let Ok(rows) = &result {
+            let row = rows.get(0).unwrap();
+            Ok(Car {
+                id: row.get("id"),
+                brand: row.get("brand"),
+                model: row.get("model"),
+                price: row.get("price"),
+                owner_id: row.get("owner_id"),
+                car_station_id: row.get("car_station_id")
+            })
+        } else {
+            Err("Something gone wrong during updating of Car".to_owned())
+        }
+    }
+
+    async fn delete(&self, id: u32) -> Result<(), String> {
+        let result = self.connection.execute(
+            "DELETE FROM Car WHERE id = $1",
+            &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            if rows == 0 {
+                Err("Car not found".to_owned())
+            } else {
+                Ok(())
+            }
+        } else {
+            Err("Something gone wrong during deleting of Car".to_owned())
+        }
+    }
+}

backend/src/storages/postgres/car_station.rs

@@ -0,0 +1,96 @@
+use tokio_postgres::Client as PgClient;
+use std::sync::Arc;
+use crate::models::car_station::{BindingCarStation, CarStation};
+use crate::storages::traits::CarStationRepository;
+use async_trait::async_trait;
+
+pub struct PostgresCarStationRepository {
+    pub connection: Arc<PgClient>
+}
+
+#[async_trait]
+impl CarStationRepository for PostgresCarStationRepository {
+    async fn create(&self, car_station: BindingCarStation) -> Result<CarStation, String> {
+        let result = self.connection.query(
+            "INSERT INTO Car_Station(address) \
+            VALUES ($1) RETURNING *",
+            &[&car_station.address]
+        ).await;
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(CarStation {
+                id: row.get("id"),
+                address: row.get("address")
+            })
+        } else {
+            Err("Something gone wrong during creation of CarStation".to_owned())
+        }
+    }
+
+    async fn read(&self, id: u32) -> Result<CarStation, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Car_Station WHERE id = $1", &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).ok_or("CarStation not found".to_owned())?;
+            Ok(CarStation {
+                id: row.get("id"),
+                address: row.get("address")
+            })
+        } else {
+            Err("Something gone wrong during reading of CarStation".to_owned())
+        }
+    }
+
+    async fn read_all(&self) -> Result<Vec<CarStation>, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Car_Station", &[]
+        ).await;
+
+        if let Ok(rows) = result {
+            Ok(
+                rows.into_iter().map(|r| CarStation {
+                    id: r.get("id"),
+                    address: r.get("address")
+                }).collect()
+            )
+        } else {
+            Err("Something gone wrong during reading CarStations".to_owned())
+        }
+    }
+
+    async fn update(&self, id: u32, car_station: BindingCarStation) -> Result<CarStation, String> {
+        let result = self.connection.query(
+            "UPDATE Car_Station SET address = $1 WHERE id = $2 RETURNING *",
+            &[&car_station.address, &id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(CarStation {
+                id: row.get("id"),
+                address: row.get("address")
+            })
+        } else {
+            Err("Something gone wrong during updating of CarStation".to_owned())
+        }
+    }
+
+    async fn delete(&self, id: u32) -> Result<(), String> {
+        let result = self.connection.execute(
+            "DELETE FROM Car_Station WHERE id = $1",
+            &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            if rows == 0 {
+                Err("CarStation not found".to_owned())
+            } else {
+                Ok(())
+            }
+        } else {
+            Err("Something gone wrong during deleting of CarStation".to_owned())
+        }
+    }
+}

backend/src/storages/postgres/client.rs

@@ -0,0 +1,111 @@
+use tokio_postgres::Client as PgClient;
+use std::sync::Arc;
+use crate::models::client::{BindingClient, Client};
+use crate::storages::traits::ClientRepository;
+use async_trait::async_trait;
+
+pub struct PostgresClientRepository {
+    pub connection: Arc<PgClient>
+}
+
+#[async_trait]
+impl ClientRepository for PostgresClientRepository {
+    async fn create(&self, client: BindingClient) -> Result<Client, String> {
+        let result = self.connection.query(
+            "INSERT INTO Client(name, surname, middlename, phone) \
+            VALUES ($1, $2, $3, $4) RETURNING *",
+            &[&client.name, &client.surname, &client.middlename, &client.phone]
+        ).await;
+
+        if let Ok(rows) = &result {
+            let row = rows.get(0).unwrap();
+            Ok(Client {
+                id: row.get("id"),
+                name: row.get("name"),
+                surname: row.get("surname"),
+                middlename: row.get("middlename"),
+                phone: row.get("phone")
+            })
+        } else {
+            Err("Something gone wrong during creation of Client".to_owned())
+        }
+    }
+
+    async fn read(&self, id: u32) -> Result<Client, String> {
+        let result= self.connection.query(
+            "SELECT * FROM Client WHERE id = $1", &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+
+            let row = rows.get(0).ok_or("Client not found".to_owned())?;
+            Ok(Client {
+                id: row.get("id"),
+                name: row.get("name"),
+                surname: row.get("surname"),
+                middlename: row.get("middlename"),
+                phone: row.get("phone")
+            })
+        } else {
+            Err("Something gone wrong during reading of Client".to_owned())
+        }
+    }
+
+    async fn read_all(&self) -> Result<Vec<Client>, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Client", &[]
+        ).await;
+
+        if let Ok(rows) = result {
+            Ok(
+                rows.into_iter().map(|r| Client {
+                    id: r.get("id"),
+                    name: r.get("name"),
+                    surname: r.get("surname"),
+                    middlename: r.get("middlename"),
+                    phone: r.get("phone")
+                }).collect()
+            )
+        } else {
+            Err("Something gone wrong during reading Clients".to_owned())
+        }
+    }
+
+    async fn update(&self, id: u32, client: BindingClient) -> Result<Client, String> {
+        let result = self.connection.query(
+            "UPDATE Client SET name = $1, surname = $2, middlename = $3, phone = $4 \
+            WHERE id = $5 RETURNING *",
+            &[&client.name, &client.surname, &client.middlename, &client.phone, &id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(Client {
+                id: row.get("id"),
+                name: row.get("name"),
+                surname: row.get("surname"),
+                middlename: row.get("middlename"),
+                phone: row.get("phone")
+            })
+        } else {
+            Err("Something gone wrong during updating of Client".to_owned())
+        }
+    }
+
+    async fn delete(&self, id: u32) -> Result<(), String> {
+        let result = self.connection.execute(
+            "DELETE FROM Client WHERE id = $1",
+            &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            if rows == 0 {
+                Err("Client not found".to_owned())
+            } else {
+                Ok(())
+            }
+        } else {
+            Err("Something gone wrong during deleting of Client".to_owned())
+        }
+    }
+}

backend/src/storages/postgres/mod.rs

@@ -0,0 +1,4 @@
+pub mod client;
+pub mod car_station;
+pub mod car;
+pub mod rent;

backend/src/storages/postgres/rent.rs

@@ -0,0 +1,104 @@
+use tokio_postgres::Client as PgClient;
+use std::sync::Arc;
+use crate::models::rent::{BindingRent, Rent};
+use crate::storages::traits::RentRepository;
+use async_trait::async_trait;
+
+pub struct PostgresRentRepository {
+    pub connection: Arc<PgClient>
+}
+
+#[async_trait]
+impl RentRepository for PostgresRentRepository {
+    async fn create(&self, rent: BindingRent) -> Result<Rent, String> {
+        let result = self.connection.query(
+            "INSERT INTO Rent(start_time, time_amount, client_id, car_id) \
+            VALUES ($1, $2, $3, $4) RETURNING *",
+            &[&rent.start_time, &rent.time_amount, &rent.client_id, &rent.car_id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(Rent {
+                id: row.get("id"),
+                start_time: row.get("start_time"),
+                time_amount: row.get("time_amount"),
+                client_id: row.get("client_id"),
+                car_id: row.get("car_id")
+            })
+        } else {
+            Err("Something gone wrong during creation of Rent".to_owned())
+        }
+    }
+
+    async fn read(&self, id: u32) -> Result<Rent, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Rent WHERE id = $1", &[&id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).ok_or("Rent not found".to_owned())?;
+            Ok(Rent {
+                id: row.get("id"),
+                start_time: row.get("start_time"),
+                time_amount: row.get("time_amount"),
+                client_id: row.get("client_id"),
+                car_id: row.get("car_id")
+            })
+        } else {
+            Err("Something gone wrong during reading of Rent".to_owned())
+        }
+    }
+
+    async fn read_all(&self) -> Result<Vec<Rent>, String> {
+        let result = self.connection.query(
+            "SELECT * FROM Rent", &[]
+        ).await;
+
+        if let Ok(rows) = result {
+            Ok(
+                rows.into_iter().map(|r| Rent {
+                    id: r.get("id"),
+                    start_time: r.get("start_time"),
+                    time_amount: r.get("time_amount"),
+                    client_id: r.get("client_id"),
+                    car_id: r.get("car_id")
+                }).collect()
+            )
+        } else {
+            Err("Something gone wrong during reading CarStations".to_owned())
+        }
+    }
+
+    async fn update(&self, id: u32, rent: BindingRent) -> Result<Rent, String> {
+        let result = self.connection.query(
+            "UPDATE Rent SET start_time = $1, time_amount = $2, client_id = $3, car_id = $4 WHERE id = $5 RETURNING *",
+            &[&rent.start_time, &rent.time_amount, &rent.client_id, &rent.car_id, &id]
+        ).await;
+
+        if let Ok(rows) = result {
+            let row = rows.get(0).unwrap();
+            Ok(Rent {
+                id: row.get("id"),
+                start_time: row.get("start_time"),
+                time_amount: row.get("time_amount"),
+                client_id: row.get("client_id"),
+                car_id: row.get("car_id")
+            })
+        } else {
+            Err("Something gone wrong during updating of Rent".to_owned())
+        }
+    }
+
+    async fn delete(&self, id: u32) -> Result<(), String> {
+        let result = self.connection.execute(
+            "DELETE FROM Rent WHERE id = $1", &[&id]
+        ).await;
+
+        if let Ok(_) = result {
+            Ok(())
+        } else {
+            Err("Something gone wrong during deletion of Rent".to_owned())
+        }
+    }
+}

backend/src/storages/traits.rs

@@ -0,0 +1,41 @@
+use crate::models::client::*;
+use crate::models::car_station::*;
+use crate::models::car::*;
+use crate::models::rent::*;
+use async_trait::async_trait;
+
+#[async_trait]
+pub trait ClientRepository {
+    async fn create(&self, client: BindingClient) -> Result<Client, String>;
+    async fn read(&self, id: u32) -> Result<Client, String>;
+    async fn read_all(&self) -> Result<Vec<Client>, String>;
+    async fn update(&self, id: u32, client: BindingClient) -> Result<Client, String>;
+    async fn delete(&self, id: u32) -> Result<(), String>;
+}
+
+#[async_trait]
+pub trait CarRepository {
+    async fn create(&self, car: BindingCar) -> Result<Car, String>;
+    async fn read(&self, id: u32) -> Result<Car, String>;
+    async fn read_all(&self) -> Result<Vec<Car>, String>;
+    async fn update(&self, id: u32, car: BindingCar) -> Result<Car, String>;
+    async fn delete(&self, id: u32) -> Result<(), String>;
+}
+
+#[async_trait]
+pub trait CarStationRepository {
+    async fn create(&self, car_station: BindingCarStation) -> Result<CarStation, String>;
+    async fn read(&self, id: u32) -> Result<CarStation, String>;
+    async fn read_all(&self) -> Result<Vec<CarStation>, String>;
+    async fn update(&self, id: u32, car_station: BindingCarStation) -> Result<CarStation, String>;
+    async fn delete(&self, id: u32) -> Result<(), String>;
+}
+
+#[async_trait]
+pub trait RentRepository {
+    async fn create(&self, rent: BindingRent) -> Result<Rent, String>;
+    async fn read(&self, id: u32) -> Result<Rent, String>;
+    async fn read_all(&self) -> Result<Vec<Rent>, String>;
+    async fn update(&self, id: u32, rent: BindingRent) -> Result<Rent, String>;
+    async fn delete(&self, id: u32) -> Result<(), String>;
+}