more on console apps

framework/console/Controller.php

@@ -60,4 +60,56 @@ class Controller extends \yii\base\Controller
 			\Yii::$application->end(1);
 		}
 	}
+
+	/**
+	 * Reads input via the readline PHP extension if that's available, or fgets() if readline is not installed.
+	 *
+	 * @param string $message to echo out before waiting for user input
+	 * @param string $default the default string to be returned when user does not write anything.
+	 * Defaults to null, means that default string is disabled.
+	 * @return mixed line read as a string, or false if input has been closed
+	 */
+	public function prompt($message, $default = null)
+	{
+		if($default !== null) {
+			$message .= " [$default] ";
+		}
+		else {
+			$message .= ' ';
+		}
+
+		if(extension_loaded('readline')) {
+			$input = readline($message);
+			if($input !== false) {
+				readline_add_history($input);
+			}
+		}
+		else {
+			echo $message;
+			$input = fgets(STDIN);
+		}
+
+		if($input === false) {
+			return false;
+		}
+		else {
+			$input = trim($input);
+			return ($input === '' && $default !== null) ? $default : $input;
+		}
+	}
+
+	/**
+	 * Asks user to confirm by typing y or n.
+	 *
+	 * @param string $message to echo out before waiting for user input
+	 * @param boolean $default this value is returned if no selection is made.
+	 * @return boolean whether user confirmed
+	 */
+	public function confirm($message, $default = false)
+	{
+		echo $message . ' (yes|no) [' . ($default ? 'yes' : 'no') . ']:';
+
+		$input = trim(fgets(STDIN));
+		return empty($input) ? $default : !strncasecmp($input, 'y', 1);
+	}
 }