rewrite connections, messages system, add dm message history, fix multiple bugs, update machine-client

database.go

@@ -20,6 +20,9 @@ func DbInit(ctx context.Context) {
 	}
 
 	_, err = dbConn.Exec(ctx, `CREATE EXTENSION IF NOT EXISTS "gen_random_uuid";`)
+	if err != nil {
+		panic(err)
+	}
 
 	_, err = dbConn.Exec(ctx, `
 		CREATE TABLE IF NOT EXISTS users (
@@ -55,6 +58,7 @@ func DbInit(ctx context.Context) {
 			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
 			sender_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 			receiver_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+			created_at TIMESTAMP NOT NULL DEFAULT NOW(),
 			content TEXT NOT NULL,
 			is_group_message BOOLEAN DEFAULT FALSE
 		)
@@ -110,7 +114,7 @@ func DbUserDelete(ctx context.Context, id uint32) error {
 	return err
 }
 
-func DbUserGetByName(ctx context.Context, user *User) error {
+func DbUserGetStandardInfoByName(ctx context.Context, user *User) error {
 	err := dbConn.QueryRow(ctx, `
 		SELECT id, name, pass_hash, pronouns, color_red, color_green, color_blue, created_at FROM users WHERE name = $1
 	`, user.Name).Scan(&user.Id, &user.Name, &user.PasswordHash, &user.Pronouns, &user.Color[0], &user.Color[1], &user.Color[2], &user.CreatedAt)
@@ -173,6 +177,13 @@ func DbConnectionSave(ctx context.Context, conn *Connection) error {
 	`, conn.RequestorId, conn.RecipientId, conn.State, conn.CreatedAt).Scan(&conn.Id)
 }
 
+func DbConnectionDelete(ctx context.Context, conn *Connection) error {
+	_, err := dbConn.Exec(ctx, `
+		DELETE FROM user_connections WHERE id = $1
+	`, conn.Id)
+	return err
+}
+
 func DbConnectionsGetBelongingToUser(ctx context.Context, user *User) error {
 	rows, err := dbConn.Query(ctx, `
 		SELECT id, requestor_id, recipient_id, state, created_at
@@ -198,13 +209,20 @@ func DbConnectionsGetBelongingToUser(ctx context.Context, user *User) error {
 	return rows.Err()
 }
 
-func DbConnectionSet(ctx context.Context, conn *Connection) error {
+func DbConnectionUpdateState(ctx context.Context, conn *Connection) error {
 	_, err := dbConn.Exec(ctx, `
 		UPDATE user_connections SET state = $1 WHERE id = $2
 	`, conn.State, conn.Id)
 	return err
 }
 
+func DbMessageSave(ctx context.Context, message *Message) error {
+	return dbConn.QueryRow(ctx, `
+		INSERT INTO messages (sender_id, receiver_id, created_at, content, is_group_message) VALUES ($1, $2, $3, $4, $5)
+		RETURNING id
+	`, message.Sender, message.Receiver, message.CreatedAt, message.Content, message.IsGroupMessage).Scan(&message.Id)
+}
+
 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)