class shellColours

class shellColours {
    private static $foreground_colours = array(
        'black' => '0;30',
        'dark_gray' => '1;30',
        'blue' => '0;34',
        'light_blue' => '1;34',
        'green' => '0;32',
        'light_green' => '1;32',
        'cyan' => '0;36',
        'light_cyan' => '1;36',
        'red' => '0;31',
        'light_red' => '1;31',
        'purple' => '0;35',
        'light_purple' => '1;35',
        'brown' => '0;33',
        'yellow' => '1;33',
        'light_gray' => '0;37',
        'white' => '1;37',
    );
    private static $background_colours = array(
        'black' => '40',
        'red' => '41',
        'green' => '42',
        'yellow' => '43',
        'blue' => '44',
        'magenta' => '45',
        'cyan' => '46',
        'light_gray' => '47',
    );
    
    /**
     * shellColours constructor.
     */
    private function __construct() {
    }
    
    /**
     * Returns coloured string.
     */
    public static function getColouredOutput($string, $foreground_colour = NULL, $background_colour = NULL) {
        $coloured_string = "";
        // Check if given foreground colour found.
        if ($foreground_colour) {
            $coloured_string .= "\x1b[" . self::$foreground_colours[$foreground_colour] . "m";
        }
        // Check if given background colour found.
        if ($background_colour) {
            $coloured_string .= "\x1b[" . self::$background_colours[$background_colour] . "m";
        }
        // Add string and end colouring.
        $coloured_string .= $string . "\x1b[0m";
        return $coloured_string;
    }
    
    /**
     * Returns all foreground colour names.
     */
    public static function getForegroundColours() {
        return array_keys(self::$foreground_colours);
    }
    
    /**
     * Returns all background colour names.
     */
    public static function getBackgroundColours() {
        return array_keys(self::$background_colours);
    }

}