+++ /dev/null
-use std::path::Path;\r
-use std::fs;\r
-\r
-//use rusqlite::types::ToSql;\r
-//use rusqlite::{Connection, Result, NO_PARAMS};\r
-\r
-//extern crate r2d2;\r
-//extern crate r2d2_sqlite;\r
-//extern crate rusqlite;\r
-\r
-use r2d2_sqlite::SqliteConnectionManager;\r
-use r2d2::Pool;\r
-\r
-#[derive(Debug)]\r
-pub enum DbError {\r
- SqliteError(rusqlite::Error),\r
- R2d2Error(r2d2::Error),\r
- UnsupportedVersion(i32),\r
-}\r
-\r
-use super::consts;\r
-\r
-const CURRENT_DB_VERSION: u32 = 1;\r
-\r
-pub struct Connection {\r
- //con: rusqlite::Connection\r
- pool: Pool<SqliteConnectionManager>\r
-}\r
-\r
-pub struct Recipe {\r
- pub title: String,\r
- pub id: i32,\r
-}\r
-\r
-impl std::convert::From<rusqlite::Error> for DbError {\r
- fn from(error: rusqlite::Error) -> Self {\r
- DbError::SqliteError(error)\r
- }\r
-}\r
-\r
-impl std::convert::From<r2d2::Error> for DbError {\r
- fn from(error: r2d2::Error) -> Self {\r
- DbError::R2d2Error(error)\r
- }\r
-}\r
-\r
-impl Connection {\r
- pub fn new() -> Result<Connection, DbError> {\r
-\r
- let data_dir = Path::new(consts::DB_DIRECTORY);\r
-\r
- if !data_dir.exists() {\r
- fs::DirBuilder::new().create(data_dir).unwrap();\r
- }\r
-\r
- let manager = SqliteConnectionManager::file("file.db");\r
- let pool = r2d2::Pool::new(manager).unwrap();\r
-\r
- let connection = Connection { pool };\r
- connection.create_or_update()?;\r
- Ok(connection)\r
- }\r
-\r
- /*\r
- * Called after the connection has been established for creating or updating the database.\r
- * The 'Version' table tracks the current state of the database.\r
- */\r
- fn create_or_update(self: &Self) -> Result<(), DbError> {\r
- // let connection = Connection::new();\r
- // let mut stmt = connection.sqlite_con.prepare("SELECT * FROM versions ORDER BY date").unwrap();\r
- // let mut stmt = connection.sqlite_con.prepare("SELECT name FROM sqlite_master WHERE type='table' AND name='versions'").unwrap();\r
-\r
- // Check the Database version.\r
- let mut con = self.pool.get()?;\r
- let tx = con.transaction()?;\r
-\r
- let mut version = {\r
- match tx.query_row(\r
- "SELECT [name] FROM [sqlite_master] WHERE [type] = 'table' AND [name] = 'Version'",\r
- rusqlite::NO_PARAMS,\r
- |row| row.get::<usize, String>(0)\r
- ) {\r
- Ok(_) => tx.query_row("SELECT [version] FROM [Version]", rusqlite::NO_PARAMS, |row| row.get(0)).unwrap_or_default(),\r
- Err(_) => 0\r
- }\r
- };\r
-\r
- while Connection::update_to_next_version(version, &tx)? {\r
- version += 1;\r
- }\r
-\r
- tx.commit()?;\r
-\r
- Ok(())\r
- }\r
-\r
- fn update_to_next_version(version: i32, tx: &rusqlite::Transaction) -> Result<bool, DbError> {\r
- match version {\r
- 0 => {\r
- println!("Update to version 1...");\r
-\r
- // Initial structure.\r
- tx.execute_batch(\r
- "\r
- CREATE TABLE [Version] (\r
- [id] INTEGER PRIMARY KEY,\r
- [version] INTEGER NOT NULL UNIQUE,\r
- [datetime] INTEGER DATETIME\r
- );\r
-\r
- CREATE TABLE [Recipe] (\r
- [id] INTEGER PRIMARY KEY,\r
- [title] INTEGER NOT NULL,\r
- [description] INTEGER DATETIME\r
- );\r
- "\r
- )?;\r
-\r
- /*\r
- tx.execute(\r
- "\r
- INSERT INTO Version\r
- ",\r
- rusqlite::NO_PARAMS\r
- );*/\r
-\r
- Ok(true)\r
- }\r
-\r
- // Current version.\r
- 1 =>\r
- Ok(false),\r
-\r
- v =>\r
- Err(DbError::UnsupportedVersion(v)),\r
- }\r
- }\r
-\r
- pub fn get_all_recipes() {\r
-\r
- }\r
-}
\ No newline at end of file