+use std::path::Path;
+use std::fs;
+
+use r2d2_sqlite::SqliteConnectionManager;
+use r2d2::Pool;
+
+use super::consts;
+
+const CURRENT_DB_VERSION: u32 = 1;
+
+pub struct Connection {
+ //con: rusqlite::Connection
+ pool: Pool<SqliteConnectionManager>
+}
+
+pub struct Recipe {
+ pub title: String,
+ pub id: i32,
+}
+
+impl Connection {
+ pub fn new() -> Connection {
+
+ let data_dir = Path::new(consts::DB_DIRECTORY);
+
+ if !data_dir.exists() {
+ fs::DirBuilder::new().create(data_dir).unwrap();
+ }
+
+ let manager = SqliteConnectionManager::file(consts::DB_FILENAME);
+ let pool = r2d2::Pool::new(manager).unwrap();
+
+ let connection = Connection { pool };
+ connection.create_or_update();
+ connection
+ }
+
+ 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 = {
+ 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
+ }
+ };
+
+ 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 [SetLetterCommand] (
+ [id] INTEGER PRIMARY KEY,
+ [pos_i] INTEGER NOT NULL,
+ [pos_j] INTEGER NOT NULL,
+ [color] INTEGER NULL,
+ [letter] INTEGER NOT NULL,
+ )
+ ",
+ rusqlite::NO_PARAMS
+ );
+ ()
+ }
+ v =>
+ panic!("Unsupported database version: {}", v)
+ };
+ }
+
+ pub fn insert_set_letter_command() {
+
+ }
+}
\ No newline at end of file