Added shared state and changed to diesel orm

Cargo.toml

@@ -9,6 +9,7 @@ edition = "2021"
 dotenv = "0.15.0"
 serde = { version = "1.0", features = ["derive"] }
 tokio = { version = "1", features = ["full"] }
-sqlx = { version = "0.5", features = [ "runtime-tokio-rustls", "mysql" ] }
+#sqlx = { version = "0.5", features = [ "runtime-tokio-rustls", "mysql" ] }
+diesel = { version = "1.4.4", features = ["mysql"] }
 actix-web = "4"
 chrono = "0.4"

src/dao/main_dao.rs

@@ -1,7 +1,8 @@
 use std::collections::HashMap;
-use sqlx::{MySqlConnection, Connection};
 
-pub async fn start_database_connection(env_vars: &HashMap<String, String>) -> Result<MySqlConnection, sqlx::Error>{
+use diesel::{MysqlConnection, Connection, ConnectionError};
+
+pub async fn start_database_connection(env_vars: &HashMap<String, String>) -> Result<MysqlConnection, ConnectionError>{
     let db_user = match env_vars.get("DB_USER") {
         Some(str) => str,
         None => panic!("DB_USER env var not found")
@@ -18,5 +19,6 @@ pub async fn start_database_connection(env_vars: &HashMap<String, String>) -> Re
         Some(str) => str,
         None => panic!("DB_DATABASE_NAME env var not found")
     };
-    MySqlConnection::connect(&format!("mysql://{db_user}:{db_pass}@{db_host}/{db_database_name}")).await
+    let formatted_db_url = &format!("mysql://{db_user}:{db_pass}@{db_host}/{db_database_name}");
+    MysqlConnection::establish(formatted_db_url)
 }

src/dao/user_dao.rs

@@ -1,8 +1,9 @@
-use sqlx::{ MySqlConnection};
-
 use crate::r#do::user::User;
 
+pub async fn _create_user_table_if_not_exists() -> Result<(), ()>{
 
-pub async fn _insert_user(_conn: &mut MySqlConnection, _user: User) -> Result<(), sqlx::Error>{
+    Ok(())
+}
+pub async fn _insert_user( _user: User) -> Result<(), ()>{
     Ok(())
 }

src/do/mod.rs

@@ -1 +1,2 @@
+pub mod shared_state;
 pub mod user;

src/do/shared_state.rs

@@ -0,0 +1,10 @@
+use std::collections::HashMap;
+
+use diesel::MysqlConnection;
+
+
+
+pub struct SharedStateObj{
+    pub db_conn: MysqlConnection,
+    pub env_vars: HashMap<String, String>,
+}

src/do/user.rs

@@ -1,6 +1,7 @@
+use diesel::Queryable;
 use serde::Serialize;
 
-#[derive(Serialize)]
+#[derive(Serialize, Queryable)]
 pub struct User{
     pub id: u16,
     pub name: String

src/main.rs

@@ -2,6 +2,7 @@ mod r#do; mod dao;
 mod routes; mod service;
 mod util;
 
+use r#do::shared_state::SharedStateObj;
 use util::env_util;
 use routes::main_router::{start_all_routes, after_startup_fn};
 use dao::main_dao;
@@ -13,11 +14,14 @@ async fn main() -> Result<(), std::io::Error> {
     let env_vars = env_util::get_dot_env_map();
     
     //  Start database
-    let _db_conn = match main_dao::start_database_connection(&env_vars).await {
+    let db_conn = match main_dao::start_database_connection(&env_vars).await {
         Ok(conn) => conn,
-        Err(e) => panic!("{}", e)
+        Err(e) => panic!("Failure starting the database. Reason: {}", e)
     };
 
-    //  Start server
+    //  Put db connection and env variables in shared state
-    start_all_routes(&after_startup_fn, &env_vars).await
+    let shared_state_obj = SharedStateObj {db_conn, env_vars };
+
+    //  Pass shared state to server and start it
+    start_all_routes(&after_startup_fn, shared_state_obj).await
 }

src/routes/main_router.rs

@@ -1,5 +1,7 @@
-use std::collections::HashMap;
+use std::{sync::Mutex};
-use actix_web::{HttpServer, App};
+use actix_web::{HttpServer, App, web};
+use crate::r#do::shared_state::SharedStateObj;
+
 use super::user_routes;
 
 //  This function is to be used in case code is meant to be run after server startup
@@ -7,15 +9,16 @@ pub fn after_startup_fn(){
     println!("{}", "Started server.");
 }
 
-pub async fn start_all_routes(after_startup_fn_call: &dyn Fn(), env_vars: &HashMap<String, String>)
+pub async fn start_all_routes(after_startup_fn_call: &dyn Fn(), state: SharedStateObj)
  -> Result<(), std::io::Error>
 {
+
     //  Get env variables to build server address
-    let host_addr: &str = match env_vars.get("HOST_ADDRESS") {
+    let host_addr: &str = match state.env_vars.get("HOST_ADDRESS") {
         Some(str) => {str},
         None => {panic!("HOST_ADDRESS env variable not found.");},
     };
-    let host_port: u16 = match env_vars.get("HOST_PORT") {
+    let host_port: u16 = match state.env_vars.get("HOST_PORT") {
         Some(str) => {
             match str.parse::<u16>() {
                 Ok(resolved_port) => {resolved_port},
@@ -25,10 +28,17 @@ pub async fn start_all_routes(after_startup_fn_call: &dyn Fn(), env_vars: &HashM
         None => {panic!("HOST_PORT env variable not found.");},
     };
 
+
+    //  Extract variables to be put into shared app state & clone them
+    let db_conn_state = web::Data::new(Mutex::new(state.db_conn));
+    let env_vars_state = web::Data::new(Mutex::new(state.env_vars.clone()));
+
     //  Start server
-    let server_future = HttpServer::new( || {
+    let server_future = HttpServer::new( move || {
         App::new()
-        //  Define routes
+        //  Define routes & pass in shared state
+            .app_data(db_conn_state.clone())
+            .app_data(env_vars_state.clone())
             .service(user_routes::get_user_from_db)
     })
     .bind((host_addr, host_port))?
@@ -36,6 +46,5 @@ pub async fn start_all_routes(after_startup_fn_call: &dyn Fn(), env_vars: &HashM
 
     let (server_start_result, _after_startup_value) = 
     tokio::join!(server_future, async {after_startup_fn_call();});
-
     return server_start_result; //   Return server
 }

src/routes/user_routes.rs

@@ -1,8 +1,16 @@
-use actix_web::{get, web::{self, Path}, HttpResponse};
+use std::sync::Mutex;
+
+use actix_web::{get, web::{self, Path, Data}, HttpResponse, post};
+use diesel::MysqlConnection;
 
 use crate::r#do::user::User;
 
 #[get("/user/{id}")]
-pub async fn get_user_from_db(id: Path<u16>) -> HttpResponse {
+pub async fn get_user_from_db(id: Path<u16>, _data: Data<Mutex<MysqlConnection>>) -> HttpResponse {
     HttpResponse::Ok().json(web::Json(User {id: *id, name: "nigga".to_string()}))
 }
+
+#[post("/user")]
+pub async fn create_user() -> HttpResponse {
+    HttpResponse::Ok().json(web::Json(""))
+}