Move sqlite related stuff to dedicated module

lutris/util/sql.py

@@ -0,0 +1,49 @@
+import sqlite3
+
+
+class db_cursor(object):
+    def __init__(self, db_path):
+        self.db_path = db_path
+
+    def __enter__(self):
+        self.db_conn = sqlite3.connect(self.db_path)
+        cursor = self.db_conn.cursor()
+        return cursor
+
+    def __exit__(self, type, value, traceback):
+        self.db_conn.commit()
+        self.db_conn.close()
+
+
+def db_insert(db_path, table, fields):
+    field_names = ", ".join(fields.keys())
+    placeholders = ("?, " * len(fields))[:-2]
+    field_values = tuple(fields.values())
+    with db_cursor(db_path) as cursor:
+        cursor.execute(
+            "insert into {0}({1}) values ({2})".format(table,
+                                                       field_names,
+                                                       placeholders),
+            field_values
+        )
+
+
+def db_delete(db_path, table, field, value):
+    with db_cursor(db_path) as cursor:
+        cursor.execute("delete from {0} where {1}=?".format(table, field),
+                       (value,))
+
+
+def db_select(db_path, table, fields):
+    field_names = ", ".join(fields)
+    with db_cursor(db_path) as cursor:
+        cursor.execute("SELECT {0} FROM {1}".format(field_names, table))
+        rows = cursor.fetchall()
+        column_names = [column[0] for column in cursor.description]
+    results = []
+    for row in rows:
+        row_data = {}
+        for index, column in enumerate(column_names):
+            row_data[column] = row[index]
+        results.append(row_data)
+    return results