Intial changes for MariaDB

backend/app.py

@@ -1,4 +1,4 @@
-from flask import Flask, render_template, Response, abort, request, redirect, send_from_directory
+from flask import Flask, render_template, Response, abort, request, redirect, send_from_directory, jsonify
 import helpers
 import database
 import data_adapters
@@ -131,8 +131,8 @@ def get_song_completions(input_string=""):
     input_string = request.args.get('search', input_string)
     if input_string != "":
         print(input_string)
-        list = database.get_song_completions(input_string=input_string)
-        return Response(json.dumps(list, ensure_ascii=False).encode('utf-8'), mimetype='text/json')
+        result = [list(x) for x in database.get_song_completions(input_string=input_string)]
+        return jsonify(result)
 
     else:
         return 400

backend/database.py

@@ -1,6 +1,10 @@
 # -*- coding: utf_8 -*-
 
+from types import NoneType
+from MySQLdb import Connection
+from sqlalchemy import create_engine
 import sqlite3
+import mariadb
 import pandas
 from io import StringIO
 
@@ -9,23 +13,28 @@ entry_table = "entries"
 index_label = "Id"
 done_table = "done_songs"
 
+connection = None
 
-def open_db():
-    conn = sqlite3.connect("/tmp/karaoqueue.db")
-    conn.execute('PRAGMA encoding = "UTF-8";')
-    return conn
+
+def open_db() -> Connection:
+    global connection
+    if (not connection):
+        engine = create_engine(
+            "mysql://ek0ur6p6ky9gdmif:jk571ov6g38g5iqv@eporqep6b4b8ql12.chr7pe7iynqr.eu-west-1.rds.amazonaws.com:3306/xdfmpudc3remzgj0")
+        connection = engine.connect()
+    # cur.execute('PRAGMA encoding = "UTF-8";')
+    return connection
 
 
 def import_songs(song_csv):
     print("Start importing Songs...")
     df = pandas.read_csv(StringIO(song_csv), sep=';')
     conn = open_db()
-    cur = conn.cursor()
     df.to_sql(song_table, conn, if_exists='replace',
               index=False)
-    cur.execute("SELECT Count(Id) FROM songs")
+    cur = conn.execute("SELECT Count(Id) FROM songs")
     num_songs = cur.fetchone()[0]
-    conn.close()
+    # conn.close()
     print("Imported songs ({} in Database)".format(num_songs))
     return("Imported songs ({} in Database)".format(num_songs))
 
@@ -34,157 +43,143 @@ def create_entry_table():
     conn = open_db()
     conn.execute('CREATE TABLE IF NOT EXISTS '+entry_table +
                  ' (ID INTEGER PRIMARY KEY NOT NULL, Song_Id INTEGER NOT NULL, Name VARCHAR(255), Client_Id VARCHAR(36), Transferred INTEGER DEFAULT 0)')
-    conn.close()
+    # conn.close()
 
 
 def create_done_song_table():
     conn = open_db()
     conn.execute('CREATE TABLE IF NOT EXISTS '+done_table +
                  ' (Song_Id INTEGER PRIMARY KEY NOT NULL,  Plays INTEGER)')
-    conn.close()
+    # conn.close()
 
 
 def create_song_table():
     conn = open_db()
-    conn.execute("CREATE TABLE IF NOT EXISTS \""+song_table+"""\" (
-        "Id" INTEGER,
-        "Title" TEXT,
-        "Artist" TEXT,
-        "Year" INTEGER,
-        "Duo" INTEGER,
-        "Explicit" INTEGER,
-        "Date Added" TEXT,
-        "Styles" TEXT,
-        "Languages" TEXT
+    conn.execute("CREATE TABLE IF NOT EXISTS `"+song_table+"""` (
+        `Id` INTEGER,
+        `Title` TEXT,
+        `Artist` TEXT,
+        `Year` INTEGER,
+        `Duo` INTEGER,
+        `Explicit` INTEGER,
+        `Date Added` TEXT,
+        `Styles` TEXT,
+        `Languages` TEXT
     )""")
-    conn.close()
+    # conn.close()
 
 
 def create_list_view():
     conn = open_db()
-    conn.execute("""CREATE VIEW IF NOT EXISTS [Liste] AS
-                 SELECT Name, Title, Artist, entries.Id, songs.Id, entries.Transferred
+    conn.execute("""CREATE OR REPLACE VIEW `Liste` AS
+                 SELECT Name, Title, Artist, entries.Id AS entry_ID, songs.Id AS song_ID, entries.Transferred
                  FROM entries, songs
-                 WHERE entries.Song_Id=songs.Id""")
-    conn.close()
+                 WHERE entries.Song_Id=Song_ID""")
+    # conn.close()
 
 
 def create_done_song_view():
     conn = open_db()
-    conn.execute("""CREATE VIEW IF NOT EXISTS [Abspielliste] AS
+    conn.execute("""CREATE OR REPLACE VIEW `Abspielliste` AS
                  SELECT Artist || \" - \" || Title AS Song, Plays AS Wiedergaben
                  FROM songs, done_songs
                  WHERE done_songs.Song_Id=songs.Id""")
-    conn.close()
+    # conn.close()
 
 
 def get_list():
     conn = open_db()
-    conn.row_factory = sqlite3.Row
-    cur = conn.cursor()
-    cur.execute("SELECT * FROM Liste")
+    cur = conn.execute("SELECT * FROM Liste")
     return cur.fetchall()
 
 
 def get_played_list():
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("SELECT * FROM Abspielliste")
+    cur = conn.execute("SELECT * FROM Abspielliste")
     return cur.fetchall()
 
 
 def get_song_list():
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("SELECT Artist || \" - \" || Title AS Song, Id FROM songs;")
+    cur = conn.execute(
+        "SELECT Artist || \" - \" || Title AS Song, Id FROM songs;")
     return cur.fetchall()
 
 
 def get_song_completions(input_string):
     conn = open_db()
-    cur = conn.cursor()
     # Don't look, it burns...
     prepared_string = "%{0}%".format(
         input_string).upper()  # "Test" -> "%TEST%"
     print(prepared_string)
-    cur.execute(
-        "SELECT Title || \" - \" || Artist AS Song, Id FROM songs WHERE REPLACE(REPLACE(REPLACE(REPLACE(UPPER( SONG ),'ö','Ö'),'ü','Ü'),'ä','Ä'),'ß','ẞ') LIKE (?) LIMIT 20;", (prepared_string,))
+    cur = conn.execute(
+        "SELECT CONCAT(Artist,\" - \",Title) AS Song, Id FROM songs WHERE CONCAT(Artist,\" - \",Title) LIKE (%s) LIMIT 20;", [prepared_string])
     return cur.fetchall()
 
 
 def add_entry(name, song_id, client_id):
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute(
-        "INSERT INTO entries (Song_Id,Name,Client_Id) VALUES(?,?,?);", (song_id, name, client_id))
-    conn.commit()
-    conn.close()
+    conn.execute(
+        "INSERT INTO entries (Song_Id,Name,Client_Id) VALUES(%s,%s,%s);", (song_id, name, client_id))
+    # conn.close()
     return
 
 
 def add_sung_song(entry_id):
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("""SELECT Song_Id FROM entries WHERE Id=?""", (entry_id,))
+    cur = conn.execute(
+        """SELECT Song_Id FROM entries WHERE Id=?""", (entry_id,))
     song_id = cur.fetchone()[0]
-    cur.execute("""INSERT OR REPLACE INTO done_songs (Song_Id, Plays)
+    conn.execute("""INSERT OR REPLACE INTO done_songs (Song_Id, Plays)
                 VALUES("""+str(song_id)+""",
                        COALESCE(
                            (SELECT Plays FROM done_songs
                             WHERE Song_Id="""+str(song_id)+"), 0) + 1)"
                  )
-    conn.commit()
     delete_entry(entry_id)
-    conn.close()
+    # conn.close()
     return True
 
 
 def toggle_transferred(entry_id):
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("SELECT Transferred FROM entries WHERE ID =?", (entry_id,))
+    cur = conn.execute(
+        "SELECT Transferred FROM entries WHERE ID =?", (entry_id,))
     marked = cur.fetchall()[0][0]
     if(marked == 0):
-        cur.execute(
+        conn.execute(
             "UPDATE entries SET Transferred = 1 WHERE ID =?", (entry_id,))
     else:
-        cur.execute(
+        conn.execute(
             "UPDATE entries SET Transferred = 0 WHERE ID =?", (entry_id,))
-    conn.commit()
-    conn.close()
+    # conn.close()
     return True
 
 
 def check_entry_quota(client_id):
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute(
+    cur = conn.execute(
         "SELECT Count(*) FROM entries WHERE entries.Client_Id = ?", (client_id,))
     return cur.fetchall()[0][0]
 
 
 def check_queue_length():
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("SELECT Count(*) FROM entries")
+    cur = conn.execute("SELECT Count(*) FROM entries")
     return cur.fetchall()[0][0]
 
 
 def clear_played_songs():
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("DELETE FROM done_songs")
-    conn.commit()
-    conn.close()
+    conn.execute("DELETE FROM done_songs")
+    # conn.close()
     return True
 
 
 def delete_entry(id):
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("DELETE FROM entries WHERE id=?", (id,))
-    conn.commit()
-    conn.close()
+    conn.execute("DELETE FROM entries WHERE id=?", (id,))
+    # conn.close()
     return True
 
 
@@ -194,19 +189,15 @@ def delete_entries(ids):
         idlist.append((x,))
     try:
         conn = open_db()
-        cur = conn.cursor()
-        cur.executemany("DELETE FROM entries WHERE id=?", idlist)
-        conn.commit()
-        conn.close()
+        cur = conn.execute("DELETE FROM entries WHERE id=?", idlist)
+        # conn.close()
         return cur.rowcount
-    except sqlite3.Error as error:
+    except mariadb.Error as error:
         return -1
 
 
 def delete_all_entries():
     conn = open_db()
-    cur = conn.cursor()
-    cur.execute("DELETE FROM entries")
-    conn.commit()
-    conn.close()
+    conn.execute("DELETE FROM entries")
+    # conn.close()
     return True

backend/requirements.txt

@@ -3,3 +3,6 @@ pandas
 Flask-BasicAuth
 bs4
 gunicorn
+mariadb
+SQLAlchemy
+mysqlclient

docker-compose.prod.yml

@@ -0,0 +1,11 @@
+version: "3.9"
+services:
+  db:
+    image: mariadb
+    restart: always
+    environment:
+      MARIADB_ROOT_PASSWORD: dpMAZj*Mc4%FZM!V
+      MARIADB_ROOT_HOST: localhost
+      MARIADB_DATABASE: karaoqueue
+      MARIADB_USER: karaoqueue
+      MARIADB_PASSWORD: a5G@P*^tCW$$w@wE