Lot of thing

backend/src/db.rs

@@ -4,46 +4,94 @@ use std::fs;
 //use rusqlite::types::ToSql;
 //use rusqlite::{Connection, Result, NO_PARAMS};
 
+//extern crate r2d2;
+//extern crate r2d2_sqlite;
+//extern crate rusqlite;
+
+use r2d2_sqlite::SqliteConnectionManager;
+use r2d2::Pool;
+
+
+use super::consts;
+
 const CURRENT_DB_VERSION: u32 = 1;
 
 pub struct Connection {
-    con: rusqlite::Connection
+    //con: rusqlite::Connection
+    pool: Pool<SqliteConnectionManager>
+}
+
+pub struct Recipe {
+    pub title: String,
+    pub id: i32,
 }
 
 impl Connection {
     pub fn new() -> Connection {
 
-        // TODO: use a constant in consts module.
-        let data_dir = Path::new("data");
+        let data_dir = Path::new(consts::DB_DIRECTORY);
 
         if !data_dir.exists() {
             fs::DirBuilder::new().create(data_dir).unwrap();
         }
 
-        Connection { con: rusqlite::Connection::open(data_dir.join("recipes.sqlite")).unwrap() }
+        let manager = SqliteConnectionManager::file("file.db");
+        let pool = r2d2::Pool::new(manager).unwrap();
+
+        let connection = Connection { pool };
+        connection.create_or_update();
+        connection
     }
 
-    pub fn create_or_update(self: &Self) -> rusqlite::Result<&str> {
-        //let connection = Connection::new();
+    fn create_or_update(self: &Self) {
+        // let connection = Connection::new();
         // let mut stmt = connection.sqlite_con.prepare("SELECT * FROM versions ORDER BY date").unwrap();
         // let mut stmt = connection.sqlite_con..prepare("SELECT name FROM sqlite_master WHERE type='table' AND name='versions'").unwrap();
 
         // Check the Database version.
+        let con = self.pool.get().unwrap();
+
         let version = {
-            let stmt_version_table = self.con.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name='versions'")?;
-            /*if stmt_version_table.query(rusqlite::NO_PARAMS)?.count() == 0 {
-                0
-            } else {
-                1 // let stmt_versions = self.con.prepare("SELECT number FROM [")
-            }*/
-            0
+            match
+                con.query_row(
+                    "SELECT [name] FROM [sqlite_master] WHERE [type] = 'table' AND [name] = 'Version'",
+                    rusqlite::NO_PARAMS,
+                    |row| row.get::<usize, String>(0)
+                ) {
+
+                Ok(_) => con.query_row("SELECT [version] FROM [Version]", rusqlite::NO_PARAMS, |row| row.get(0)).unwrap_or_default(),
+                Err(_) => 0
+            }
         };
 
-        self.con.query_row(
-            "SELECT name FROM sqlite_master WHERE type='table' AND name='versions'",
-            rusqlite::NO_PARAMS,
-            |row| Ok(dbg!("test"))
-        )
+        match version {
+            0 => {
+                println!("Update to version 1...");
+                con.execute(
+                    "
+                    CREATE TABLE [Version] (
+                        [id] INTEGER PRIMARY KEY,
+                        [version] INTEGER NOT NULL,
+                        [datetime] INTEGER DATETIME
+                    )
+                    ",
+                    rusqlite::NO_PARAMS
+                );
+                con.execute(
+                    "
+                    CREATE TABLE [Recipe] (
+                        [id] INTEGER PRIMARY KEY,
+                        [title] INTEGER NOT NULL,
+                        [description] INTEGER DATETIME
+                    )
+                    ",
+                    rusqlite::NO_PARAMS
+                );
+                ()
+            }
+            v =>
+                panic!("Unsupported database version: {}", v)
+        };
     }
 
     pub fn get_all_recipes() {