Merge branch 'master' of euphorik.ch:rup into master

[rup.git] / backend / src / db.rs

diff --git a/backend/src/db.rs b/backend/src/db.rs
new file mode 100644 (file)
index 0000000..2bae4fd
--- /dev/null
+++ b/backend/src/db.rs
@@ -0,0 +1,93 @@
+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() {
+
+    }
+}
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