Merge pull request 'Implement friends' (#96) from 44-implement-friends into main

Reviewed-on: LibreTunes/LibreTunes#96

migrations/2024-05-20-154208_add_friends/down.sql

@@ -0,0 +1,7 @@
+DROP INDEX friendships_friend_2_idx;
+DROP INDEX friendships_friend_1_idx;
+DROP TABLE friendships;
+
+DROP INDEX incoming_friend_requests_idx;
+DROP INDEX outgoing_friend_requests_idx;
+DROP TABLE friend_requests;

migrations/2024-05-20-154208_add_friends/up.sql

@@ -0,0 +1,19 @@
+CREATE TABLE friend_requests (
+	created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+	from_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
+	to_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
+	PRIMARY KEY (from_id, to_id)
+);
+
+CREATE INDEX outgoing_friend_requests_idx ON friend_requests(from_id);
+CREATE INDEX incoming_friend_requests_idx ON friend_requests(to_id);
+
+CREATE TABLE friendships (
+	created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+	friend_1_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
+	friend_2_id INTEGER REFERENCES users(id) ON DELETE CASCADE NOT NULL,
+	PRIMARY KEY (friend_1_id, friend_2_id)
+);
+
+CREATE INDEX friendships_friend_1_idx ON friendships(friend_1_id);
+CREATE INDEX friendships_friend_2_idx ON friendships(friend_2_id);

src/schema.rs

@@ -23,6 +23,22 @@ diesel::table! {
     }
 }
 
+diesel::table! {
+    friend_requests (from_id, to_id) {
+        created_at -> Timestamp,
+        from_id -> Int4,
+        to_id -> Int4,
+    }
+}
+
+diesel::table! {
+    friendships (friend_1_id, friend_2_id) {
+        created_at -> Timestamp,
+        friend_1_id -> Int4,
+        friend_2_id -> Int4,
+    }
+}
+
 diesel::table! {
     song_artists (song_id, artist_id) {
         song_id -> Int4,
@@ -82,6 +98,8 @@ diesel::allow_tables_to_appear_in_same_query!(
     album_artists,
     albums,
     artists,
+    friend_requests,
+    friendships,
     song_artists,
     song_dislikes,
     song_likes,