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folkugat_web/dal/sql/playlists/write.py

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+from typing import Optional
+
+from folkugat_web.dal.sql import Connection, get_connection
+from folkugat_web.model import playlists as model
+
+from ._conversion import playlist_entry_to_row, row_to_playlist_entry
+
+
+def insert_playlist_entry(pl_entry: model.PlaylistEntry, con: Optional[Connection] = None) -> model.PlaylistEntry:
+    query = """
+      INSERT INTO playlists
+        (id, session_id, set_id, tema_id)
+      VALUES
+        (:id, :session_id, :set_id, :tema_id)
+      RETURNING *
+    """
+    data = playlist_entry_to_row(pl_entry)
+    with get_connection(con) as con:
+        cur = con.cursor()
+        cur.execute(query, data)
+        row = cur.fetchone()
+        return row_to_playlist_entry(row)
+
+
+def update_playlist_entry(entry: model.PlaylistEntry, con: Optional[Connection] = None):
+    query = """
+      UPDATE playlists
+      SET
+        id = :id, session_id = :session_id, set_id = :set_id, tema_id = :tema_id
+      WHERE
+        id = :id
+    """
+    data = playlist_entry_to_row(entry)
+    with get_connection(con) as con:
+        cur = con.cursor()
+        cur.execute(query, data)
+        return
+
+
+def delete_playlist_entry(entry_id: int, con: Optional[Connection] = None):
+    query = """
+      DELETE FROM playlists
+      WHERE id = :id
+    """
+    data = dict(id=entry_id)
+    with get_connection(con) as con:
+        cur = con.cursor()
+        cur.execute(query, data)
+        return
+
+
+def delete_playlist_set(session_id: int, set_id: int, con: Optional[Connection] = None):
+    query = """
+      DELETE FROM playlists
+      WHERE session_id = :session_id AND set_id = :set_id
+    """
+    data = dict(session_id=session_id, set_id=set_id)
+    with get_connection(con) as con:
+        cur = con.cursor()
+        cur.execute(query, data)
+        return