Add connection to the database

Cargo.toml

@@ -8,3 +8,6 @@ edition = "2018"
 
 [dependencies]
 yaml-rust = "0.4.3"
+mysql = "18.2.0"
+
+

src/helpers/database.rs

@@ -0,0 +1,28 @@
+use std::error::Error;
+use std::sync::{Mutex, Arc};
+use crate::data::config::DatabaseConfig;
+use mysql::Pool;
+
+/// Database access helper
+///
+/// @author Pierre Hubert
+
+// Pool shared across threads
+static mut POOL: Option<Arc<Mutex<mysql::Pool>>> = None;
+
+/// Connect to the database
+pub fn connect(conf: &DatabaseConfig) -> Result<(), Box<dyn Error>> {
+    let url = format!(
+        "mysql://{}:{}@{}:3306/{}",
+        conf.username, conf.password, conf.host, conf.name
+    );
+
+    let pool = Pool::new(url)?;
+    let pool = Some(Arc::new(Mutex::new(pool)));
+
+    unsafe {
+        POOL = pool;
+    }
+
+    Ok(())
+}

src/helpers/mod.rs

@@ -0,0 +1 @@
+pub mod database;

src/lib.rs

@@ -1 +1,2 @@
 pub mod data;
+pub mod helpers;

src/main.rs

@@ -1,11 +1,13 @@
 use comunic_server::data::config::{conf, Config};
+use comunic_server::helpers::database;
 
 fn main() {
 
     // Load configuration
     Config::load("config.yaml").expect("Could not load configuration!");
 
-    println!("{:#?}", conf());
+    // Connect to the database
+    database::connect(&conf().database).expect("Could not connect to database!");
 
     println!("Hello, world!");
 }