fix connection handlers, group ops, and various HTTP handler bugs

database.go

@@ -38,9 +38,13 @@ func DbInit(ctx context.Context) {
 			requestor_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 			recipient_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 			is_accepted BOOLEAN NOT NULL DEFAULT FALSE,
-			created_at TIMESTAMP NOT NULL DEFAULT NOW()
+			created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+			PRIMARY KEY (requestor_id, recipient_id)
 		)
 	`)
+	if err != nil {
+		panic(err)
+	}
 
 	_, err = dbConn.Exec(ctx, `
 		CREATE TABLE IF NOT EXISTS chat_groups (
@@ -184,6 +188,27 @@ func DbGroupSetColor(ctx context.Context, group *Group) error {
 	return err
 }
 
+func DbConnectionSave(ctx context.Context, creationDate time.Time, requestorId uint32, recipientId uint32, isAccepted bool) error {
+	_, err := dbConn.Exec(ctx, `
+		INSERT INTO user_connections (created_at, requestor_id, recipient_id, is_accepted) VALUES ($1, $2, $3, $4)
+	`, creationDate, requestorId, recipientId, isAccepted)
+	return err
+}
+
+func DbConnectionAccept(ctx context.Context, requestorId uint32, recipientId uint32) error {
+	_, err := dbConn.Exec(ctx, `
+		UPDATE user_connections SET is_accepted = true WHERE requestor_id = $1 AND recipient_id = $2
+	`, requestorId, recipientId)
+	return err
+}
+
+func DbConnectionDelete(ctx context.Context, requestorId uint32, recipientId uint32) error {
+	_, err := dbConn.Exec(ctx, `
+		DELETE FROM user_connections WHERE requestor_id = $1 AND recipient_id = $2
+	`, requestorId, recipientId)
+	return err
+}
+
 func DbGroupSave(ctx context.Context, group *Group) error {
 	err := dbConn.QueryRow(ctx, `
 		INSERT INTO chat_groups (name, creator_id, owner_id, enable_client_colors, color_red, color_green, color_blue, created_at)