added functional groups api + started pictures

src/db/pictures.py

@@ -0,0 +1,97 @@
+import json
+
+import psycopg2.extras
+from psycopg2._psycopg import connection
+
+# picture create and delete
+
+def create_picture(
+    conn: connection,
+    source: str,
+    external_id: str,
+    url: str,
+    metadata: dict
+):
+    with conn.cursor() as cur:
+        cur.execute(
+            """
+            insert into picrinth.pictures
+            (source, external_id, url, metadata, created_at)
+            values (%s, %s, %s, %s, now())
+            returning id
+            """,
+            (source, external_id, url, json.dumps(metadata)),
+        )
+        result = cur.fetchone()
+        conn.commit()
+        if result is None:
+            return None
+        return result[0]
+
+
+def delete_picture_by_url(
+    conn: connection,
+    url: str
+):
+    with conn.cursor() as cur:
+        cur.execute(
+            """
+            delete from picrinth.pictures
+            where url = %s
+            """,
+            (url,),
+        )
+        conn.commit()
+        return cur.rowcount > 0
+
+def delete_picture_by_id(
+    conn: connection,
+    id: int
+):
+    with conn.cursor() as cur:
+        cur.execute(
+            """
+            delete from picrinth.pictures
+            where id = %s
+            """,
+            (id,),
+        )
+        conn.commit()
+        return cur.rowcount > 0
+
+
+# picture receiving
+
+def get_picture_by_url(
+    conn: connection,
+    url: str
+):
+    with conn.cursor(cursor_factory=psycopg2.extras.DictCursor) as cur:
+        cur.execute(
+            """
+            select id, source,
+            external_id, url,
+            metadata, created_at
+            from picrinth.pictures
+            where url = %s
+            """,
+            (url,),
+        )
+        return cur.fetchone()
+
+def get_picture_by_id(
+    conn: connection,
+    id: str
+):
+    with conn.cursor(cursor_factory=psycopg2.extras.DictCursor) as cur:
+        cur.execute(
+            """
+            select id, source,
+            external_id, url,
+            metadata, created_at
+            from picrinth.pictures
+            where id = %s
+            """,
+            (id,),
+        )
+        return cur.fetchone()