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							881 lines
						
					
					
						
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				<?php | 
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/** | 
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 * @link http://www.yiiframework.com/ | 
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 * @copyright Copyright (c) 2008 Yii Software LLC | 
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 * @license http://www.yiiframework.com/license/ | 
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 */ | 
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 | 
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namespace yii\helpers\base; | 
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 | 
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// todo test this on all kinds of terminals, especially windows (check out lib ncurses) | 
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 | 
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/** | 
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 * Console View is the base class for console view components | 
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 * | 
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 * A console view provides functionality to create rich console application by allowing to format output | 
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 * by adding color and font style to it. | 
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 * | 
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 * @author Carsten Brandt <mail@cebe.cc> | 
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 * @since 2.0 | 
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 */ | 
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class Console | 
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{ | 
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    const FG_BLACK  = 30; | 
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    const FG_RED    = 31; | 
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    const FG_GREEN  = 32; | 
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    const FG_YELLOW = 33; | 
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    const FG_BLUE   = 34; | 
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    const FG_PURPLE = 35; | 
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    const FG_CYAN   = 36; | 
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    const FG_GREY   = 37; | 
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 | 
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    const BG_BLACK  = 40; | 
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    const BG_RED    = 41; | 
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    const BG_GREEN  = 42; | 
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    const BG_YELLOW = 43; | 
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    const BG_BLUE   = 44; | 
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    const BG_PURPLE = 45; | 
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    const BG_CYAN   = 46; | 
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    const BG_GREY   = 47; | 
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 | 
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    const NORMAL      = 0; | 
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    const BOLD        = 1; | 
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    const ITALIC      = 3; | 
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    const UNDERLINE   = 4; | 
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    const BLINK       = 5; | 
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    const NEGATIVE    = 7; | 
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    const CONCEALED   = 8; | 
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    const CROSSED_OUT = 9; | 
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    const FRAMED      = 51; | 
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    const ENCIRCLED   = 52; | 
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    const OVERLINED   = 53; | 
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 | 
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    /** | 
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     * Moves the terminal cursor up by sending ANSI control code CUU to the terminal. | 
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     * If the cursor is already at the edge of the screen, this has no effect. | 
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     * @param integer $rows number of rows the cursor should be moved up | 
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     */ | 
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    public static function moveCursorUp($rows = 1) | 
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    { | 
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        echo "\033[" . (int)$rows . 'A'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the terminal cursor down by sending ANSI control code CUD to the terminal. | 
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     * If the cursor is already at the edge of the screen, this has no effect. | 
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     * @param integer $rows number of rows the cursor should be moved down | 
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     */ | 
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    public static function moveCursorDown($rows = 1) | 
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    { | 
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        echo "\033[" . (int)$rows . 'B'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the terminal cursor forward by sending ANSI control code CUF to the terminal. | 
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     * If the cursor is already at the edge of the screen, this has no effect. | 
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     * @param integer $steps number of steps the cursor should be moved forward | 
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     */ | 
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    public static function moveCursorForward($steps = 1) | 
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    { | 
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        echo "\033[" . (int)$steps . 'C'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the terminal cursor backward by sending ANSI control code CUB to the terminal. | 
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     * If the cursor is already at the edge of the screen, this has no effect. | 
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     * @param integer $steps number of steps the cursor should be moved backward | 
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     */ | 
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    public static function moveCursorBackward($steps = 1) | 
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    { | 
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        echo "\033[" . (int)$steps . 'D'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the terminal cursor to the beginning of the next line by sending ANSI control code CNL to the terminal. | 
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     * @param integer $lines number of lines the cursor should be moved down | 
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     */ | 
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    public static function moveCursorNextLine($lines = 1) | 
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    { | 
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        echo "\033[" . (int)$lines . 'E'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the terminal cursor to the beginning of the previous line by sending ANSI control code CPL to the terminal. | 
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     * @param integer $lines number of lines the cursor should be moved up | 
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     */ | 
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    public static function moveCursorPrevLine($lines = 1) | 
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    { | 
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        echo "\033[" . (int)$lines . 'F'; | 
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    } | 
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 | 
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    /** | 
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     * Moves the cursor to an absolute position given as column and row by sending ANSI control code CUP or CHA to the terminal. | 
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     * @param integer $column 1-based column number, 1 is the left edge of the screen. | 
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     * @param integer|null $row 1-based row number, 1 is the top edge of the screen. if not set, will move cursor only in current line. | 
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     */ | 
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    public static function moveCursorTo($column, $row = null) | 
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    { | 
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        if ($row === null) { | 
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            echo "\033[" . (int)$column . 'G'; | 
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        } else { | 
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            echo "\033[" . (int)$row . ';' . (int)$column . 'H'; | 
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        } | 
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    } | 
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 | 
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    /** | 
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     * Scrolls whole page up by sending ANSI control code SU to the terminal. | 
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     * New lines are added at the bottom. This is not supported by ANSI.SYS used in windows. | 
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     * @param int $lines number of lines to scroll up | 
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     */ | 
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    public static function scrollUp($lines = 1) | 
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    { | 
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        echo "\033[" . (int)$lines . "S"; | 
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    } | 
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 | 
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    /** | 
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     * Scrolls whole page down by sending ANSI control code SD to the terminal. | 
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     * New lines are added at the top. This is not supported by ANSI.SYS used in windows. | 
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     * @param int $lines number of lines to scroll down | 
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     */ | 
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    public static function scrollDown($lines = 1) | 
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    { | 
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        echo "\033[" . (int)$lines . "T"; | 
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    } | 
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 | 
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    /** | 
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     * Saves the current cursor position by sending ANSI control code SCP to the terminal. | 
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     * Position can then be restored with {@link restoreCursorPosition}. | 
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     */ | 
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    public static function saveCursorPosition() | 
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    { | 
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        echo "\033[s"; | 
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    } | 
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 | 
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    /** | 
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     * Restores the cursor position saved with {@link saveCursorPosition} by sending ANSI control code RCP to the terminal. | 
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     */ | 
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    public static function restoreCursorPosition() | 
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    { | 
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        echo "\033[u"; | 
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    } | 
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 | 
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    /** | 
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     * Hides the cursor by sending ANSI DECTCEM code ?25l to the terminal. | 
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     * Use {@link showCursor} to bring it back. | 
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     * Do not forget to show cursor when your application exits. Cursor might stay hidden in terminal after exit. | 
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     */ | 
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    public static function hideCursor() | 
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    { | 
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        echo "\033[?25l"; | 
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    } | 
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 | 
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    /** | 
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     * Will show a cursor again when it has been hidden by {@link hideCursor}  by sending ANSI DECTCEM code ?25h to the terminal. | 
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     */ | 
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    public static function showCursor() | 
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    { | 
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        echo "\033[?25h"; | 
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    } | 
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 | 
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    /** | 
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     * Clears entire screen content by sending ANSI control code ED with argument 2 to the terminal. | 
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     * Cursor position will not be changed. | 
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     * **Note:** ANSI.SYS implementation used in windows will reset cursor position to upper left corner of the screen. | 
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     */ | 
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    public static function clearScreen() | 
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    { | 
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        echo "\033[2J"; | 
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    } | 
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 | 
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    /** | 
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     * Clears text from cursor to the beginning of the screen by sending ANSI control code ED with argument 1 to the terminal. | 
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     * Cursor position will not be changed. | 
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     */ | 
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    public static function clearScreenBeforeCursor() | 
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    { | 
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        echo "\033[1J"; | 
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    } | 
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 | 
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    /** | 
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     * Clears text from cursor to the end of the screen by sending ANSI control code ED with argument 0 to the terminal. | 
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     * Cursor position will not be changed. | 
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     */ | 
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    public static function clearScreenAfterCursor() | 
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    { | 
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        echo "\033[0J"; | 
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    } | 
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 | 
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    /** | 
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     * Clears the line, the cursor is currently on by sending ANSI control code EL with argument 2 to the terminal. | 
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     * Cursor position will not be changed. | 
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     */ | 
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    public static function clearLine() | 
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    { | 
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        echo "\033[2K"; | 
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    } | 
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 | 
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    /** | 
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     * Clears text from cursor position to the beginning of the line by sending ANSI control code EL with argument 1 to the terminal. | 
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     * Cursor position will not be changed. | 
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     */ | 
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    public static function clearLineBeforeCursor() | 
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    { | 
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        echo "\033[1K"; | 
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    } | 
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 | 
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    /** | 
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     * Clears text from cursor position to the end of the line by sending ANSI control code EL with argument 0 to the terminal. | 
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     * Cursor position will not be changed. | 
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     */ | 
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    public static function clearLineAfterCursor() | 
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    { | 
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        echo "\033[0K"; | 
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    } | 
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 | 
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    /** | 
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     * Will send ANSI format for following output | 
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     * | 
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     * You can pass any of the FG_*, BG_* and TEXT_* constants and also xterm256ColorBg | 
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     * TODO: documentation | 
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     */ | 
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    public static function ansiStyle() | 
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    { | 
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        echo "\033[" . implode(';', func_get_args()) . 'm'; | 
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    } | 
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 | 
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    /** | 
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     * Will return a string formatted with the given ANSI style | 
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     * | 
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     * See {@link ansiStyle} for possible arguments. | 
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     * @param string $string the string to be formatted | 
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     * @return string | 
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     */ | 
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    public static function ansiStyleString($string) | 
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    { | 
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        $args = func_get_args(); | 
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        array_shift($args); | 
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        $code = implode(';', $args); | 
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        return "\033[0m" . ($code !== '' ? "\033[" . $code . "m" : '') . $string . "\033[0m"; | 
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    } | 
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 | 
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    //const COLOR_XTERM256 = 38;// http://en.wikipedia.org/wiki/Talk:ANSI_escape_code#xterm-256colors | 
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    public static function xterm256ColorFg($i) // TODO naming! | 
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    { | 
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        return '38;5;' . $i; | 
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    } | 
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 | 
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    public static function xterm256ColorBg($i) // TODO naming! | 
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    { | 
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        return '48;5;' . $i; | 
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    } | 
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 | 
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    /** | 
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     * Usage: list($w, $h) = ConsoleHelper::getScreenSize(); | 
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     * | 
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     * @return array | 
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     */ | 
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    public static function getScreenSize() | 
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    { | 
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        // TODO implement | 
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        return array(150, 50); | 
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    } | 
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 | 
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    /** | 
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     * resets any ansi style set by previous method {@link ansiStyle} | 
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     * Any output after this is will have default text style. | 
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     */ | 
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    public static function reset() | 
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    { | 
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        echo "\033[0m"; | 
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    } | 
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 | 
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    /** | 
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     * Strips ANSI control codes from a string | 
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     * | 
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     * @param string $string String to strip | 
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     * @return string | 
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     */ | 
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    public static function strip($string) | 
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    { | 
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        return preg_replace('/\033\[[\d;]+m/', '', $string); // TODO currently only strips color | 
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    } | 
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 | 
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    // TODO refactor and review | 
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    public static function ansiToHtml($string) | 
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    { | 
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        $tags = 0; | 
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        return preg_replace_callback( | 
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            '/\033\[[\d;]+m/', | 
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            function ($ansi) use (&$tags) { | 
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                $styleA = array(); | 
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                foreach (explode(';', $ansi) as $controlCode) { | 
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                    switch ($controlCode) { | 
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                        case static::FG_BLACK: | 
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                            $style = array('color' => '#000000'); | 
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                            break; | 
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                        case static::FG_BLUE: | 
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                            $style = array('color' => '#000078'); | 
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                            break; | 
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                        case static::FG_CYAN: | 
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                            $style = array('color' => '#007878'); | 
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                            break; | 
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                        case static::FG_GREEN: | 
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                            $style = array('color' => '#007800'); | 
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                            break; | 
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                        case static::FG_GREY: | 
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                            $style = array('color' => '#787878'); | 
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                            break; | 
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                        case static::FG_PURPLE: | 
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                            $style = array('color' => '#780078'); | 
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                            break; | 
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                        case static::FG_RED: | 
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                            $style = array('color' => '#780000'); | 
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                            break; | 
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                        case static::FG_YELLOW: | 
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                            $style = array('color' => '#787800'); | 
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                            break; | 
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                        case static::BG_BLACK: | 
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                            $style = array('background-color' => '#000000'); | 
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                            break; | 
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                        case static::BG_BLUE: | 
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                            $style = array('background-color' => '#000078'); | 
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                            break; | 
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                        case static::BG_CYAN: | 
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                            $style = array('background-color' => '#007878'); | 
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                            break; | 
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                        case static::BG_GREEN: | 
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                            $style = array('background-color' => '#007800'); | 
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                            break; | 
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                        case static::BG_GREY: | 
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                            $style = array('background-color' => '#787878'); | 
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                            break; | 
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                        case static::BG_PURPLE: | 
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                            $style = array('background-color' => '#780078'); | 
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                            break; | 
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                        case static::BG_RED: | 
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                            $style = array('background-color' => '#780000'); | 
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                            break; | 
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                        case static::BG_YELLOW: | 
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                            $style = array('background-color' => '#787800'); | 
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                            break; | 
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                        case static::BOLD: | 
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                            $style = array('font-weight' => 'bold'); | 
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                            break; | 
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                        case static::ITALIC: | 
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                            $style = array('font-style' => 'italic'); | 
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                            break; | 
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                        case static::UNDERLINE: | 
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                            $style = array('text-decoration' => array('underline')); | 
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                            break; | 
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                        case static::OVERLINED: | 
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                            $style = array('text-decoration' => array('overline')); | 
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                            break; | 
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                        case static::CROSSED_OUT: | 
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                            $style = array('text-decoration' => array('line-through')); | 
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                            break; | 
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                        case static::BLINK: | 
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                            $style = array('text-decoration' => array('blink')); | 
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                            break; | 
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                        case static::NEGATIVE: // ??? | 
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                        case static::CONCEALED: | 
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                        case static::ENCIRCLED: | 
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                        case static::FRAMED: | 
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                            // TODO allow resetting codes | 
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                            break; | 
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                        case 0: // ansi reset | 
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                            $return = ''; | 
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                            for ($n = $tags; $tags > 0; $tags--) { | 
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                                $return .= '</span>'; | 
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                            } | 
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                            return $return; | 
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                    } | 
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 | 
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                    $styleA = ArrayHelper::merge($styleA, $style); | 
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                } | 
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                $styleString[] = array(); | 
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                foreach ($styleA as $name => $content) { | 
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                    if ($name === 'text-decoration') { | 
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                        $content = implode(' ', $content); | 
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                    } | 
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                    $styleString[] = $name . ':' . $content; | 
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                } | 
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                $tags++; | 
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                return '<span' . (!empty($styleString) ? 'style="' . implode(';', $styleString) : '') . '>'; | 
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            }, | 
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            $string | 
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        ); | 
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    } | 
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 | 
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    /** | 
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     * | 
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     * Returns an ANSI-Controlcode | 
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     * | 
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     * Takes 1 to 3 Arguments: either 1 to 3 strings containing the name of the | 
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     * FG Color, style and BG color, or one array with the indices color, style | 
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     * or background. | 
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     * | 
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     * @param mixed  $color      Optional. | 
						|
     *                           Either a string with the name of the foreground | 
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     *                           color, or an array with the indices 'color', | 
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     *                           'style', 'background' and corresponding names as | 
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     *                           values. | 
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     * @param string $style      Optional name of the style | 
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     * @param string $background Optional name of the background color | 
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     * | 
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     * @return string | 
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     */ | 
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    public function color($color = null, $style = null, $background = null) // {{{ | 
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    { | 
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        $colors = static::getColorCodes(); | 
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 | 
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        if (is_array($color)) { | 
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            $style      = isset($color['style']) ? $color['style'] : null; | 
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            $background = isset($color['background']) ? $color['background'] : null; | 
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            $color      = isset($color['color']) ? $color['color'] : null; | 
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        } | 
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 | 
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        if ($color == 'reset') { | 
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            return "\033[0m"; | 
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        } | 
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 | 
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        $code = array(); | 
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        if (isset($style)) { | 
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            $code[] = $colors['style'][$style]; | 
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        } | 
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 | 
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        if (isset($color)) { | 
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            $code[] = $colors['color'][$color]; | 
						|
        } | 
						|
 | 
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        if (isset($background)) { | 
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            $code[] = $colors['background'][$background]; | 
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        } | 
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 | 
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        if (empty($code)) { | 
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            $code[] = 0; | 
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        } | 
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        $code = implode(';', $code); | 
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        return "\033[{$code}m"; | 
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    } | 
						|
 | 
						|
    /** | 
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     * TODO syntax copied from https://github.com/pear/Console_Color2/blob/master/Console/Color2.php | 
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     * | 
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     * Converts colorcodes in the format %y (for yellow) into ansi-control | 
						|
     * codes. The conversion table is: ('bold' meaning 'light' on some | 
						|
     * terminals). It's almost the same conversion table irssi uses. | 
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     * <pre> | 
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     *                  text      text            background | 
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     *      ------------------------------------------------ | 
						|
     *      %k %K %0    black     dark grey       black | 
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     *      %r %R %1    red       bold red        red | 
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     *      %g %G %2    green     bold green      green | 
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     *      %y %Y %3    yellow    bold yellow     yellow | 
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     *      %b %B %4    blue      bold blue       blue | 
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     *      %m %M %5    magenta   bold magenta    magenta | 
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     *      %p %P       magenta (think: purple) | 
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     *      %c %C %6    cyan      bold cyan       cyan | 
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     *      %w %W %7    white     bold white      white | 
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     * | 
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     *      %F     Blinking, Flashing | 
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     *      %U     Underline | 
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     *      %8     Reverse | 
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     *      %_,%9  Bold | 
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     * | 
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     *      %n     Resets the color | 
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     *      %%     A single % | 
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     * </pre> | 
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     * First param is the string to convert, second is an optional flag if | 
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     * colors should be used. It defaults to true, if set to false, the | 
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     * colorcodes will just be removed (And %% will be transformed into %) | 
						|
     * | 
						|
     * @param string $string  String to convert | 
						|
     * @param bool   $colored Should the string be colored? | 
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     * | 
						|
     * @return string | 
						|
     */ | 
						|
    public static function renderColoredString($string, $colored = true) | 
						|
    { | 
						|
        static $conversions = array( // static so the array doesn't get built | 
						|
            // everytime | 
						|
            // %y - yellow, and so on... {{{ | 
						|
            '%y' => array('color' => 'yellow'), | 
						|
            '%g' => array('color' => 'green'), | 
						|
            '%b' => array('color' => 'blue'), | 
						|
            '%r' => array('color' => 'red'), | 
						|
            '%p' => array('color' => 'purple'), | 
						|
            '%m' => array('color' => 'purple'), | 
						|
            '%c' => array('color' => 'cyan'), | 
						|
            '%w' => array('color' => 'grey'), | 
						|
            '%k' => array('color' => 'black'), | 
						|
            '%n' => array('color' => 'reset'), | 
						|
            '%Y' => array('color' => 'yellow', 'style' => 'light'), | 
						|
            '%G' => array('color' => 'green', 'style' => 'light'), | 
						|
            '%B' => array('color' => 'blue', 'style' => 'light'), | 
						|
            '%R' => array('color' => 'red', 'style' => 'light'), | 
						|
            '%P' => array('color' => 'purple', 'style' => 'light'), | 
						|
            '%M' => array('color' => 'purple', 'style' => 'light'), | 
						|
            '%C' => array('color' => 'cyan', 'style' => 'light'), | 
						|
            '%W' => array('color' => 'grey', 'style' => 'light'), | 
						|
            '%K' => array('color' => 'black', 'style' => 'light'), | 
						|
            '%N' => array('color' => 'reset', 'style' => 'light'), | 
						|
            '%3' => array('background' => 'yellow'), | 
						|
            '%2' => array('background' => 'green'), | 
						|
            '%4' => array('background' => 'blue'), | 
						|
            '%1' => array('background' => 'red'), | 
						|
            '%5' => array('background' => 'purple'), | 
						|
            '%6' => array('background' => 'cyan'), | 
						|
            '%7' => array('background' => 'grey'), | 
						|
            '%0' => array('background' => 'black'), | 
						|
            // Don't use this, I can't stand flashing text | 
						|
            '%F' => array('style' => 'blink'), | 
						|
            '%U' => array('style' => 'underline'), | 
						|
            '%8' => array('style' => 'inverse'), | 
						|
            '%9' => array('style' => 'bold'), | 
						|
            '%_' => array('style' => 'bold') | 
						|
            // }}} | 
						|
        ); | 
						|
 | 
						|
        if ($colored) { | 
						|
            $string = str_replace('%%', '% ', $string); | 
						|
            foreach ($conversions as $key => $value) { | 
						|
                $string = str_replace( | 
						|
                    $key, | 
						|
                    static::color($value), | 
						|
                    $string | 
						|
                ); | 
						|
            } | 
						|
            $string = str_replace('% ', '%', $string); | 
						|
 | 
						|
        } else { | 
						|
            $string = preg_replace('/%((%)|.)/', '$2', $string); | 
						|
        } | 
						|
 | 
						|
        return $string; | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Returns the different foreground and background color codes and styles available. | 
						|
     * @return array the color codes | 
						|
     */ | 
						|
    public static function getColorCodes() | 
						|
    { | 
						|
        return array( | 
						|
            'color'      => array( | 
						|
                'black'  => static::FG_BLACK, | 
						|
                'red'    => static::FG_RED, | 
						|
                'green'  => static::FG_GREEN, | 
						|
                'yellow' => static::FG_YELLOW, | 
						|
                'blue'   => static::FG_BLUE, | 
						|
                'purple' => static::FG_PURPLE, | 
						|
                'cyan'   => static::FG_CYAN, | 
						|
                'grey'   => static::FG_GREY, | 
						|
            ), | 
						|
            'style'      => array( | 
						|
                'normal'      => static::NORMAL, | 
						|
                'bold'        => static::BOLD, | 
						|
                'italic'      => static::ITALIC, | 
						|
                'underline'   => static::UNDERLINE, | 
						|
                'blink'       => static::BLINK, | 
						|
                'negative'    => static::NEGATIVE, | 
						|
                'concealed'   => static::CONCEALED, | 
						|
                'crossed_out' => static::CROSSED_OUT, | 
						|
                'framed'      => static::FRAMED, | 
						|
                'encircled'   => static::ENCIRCLED, | 
						|
                'overlined'   => static::OVERLINED | 
						|
            ), | 
						|
            'background' => array( | 
						|
                'black'  => static::BG_BLACK, | 
						|
                'red'    => static::BG_RED, | 
						|
                'green'  => static::BG_RED, | 
						|
                'yellow' => static::BG_YELLOW, | 
						|
                'blue'   => static::BG_BLUE, | 
						|
                'purple' => static::BG_PURPLE, | 
						|
                'cyan'   => static::BG_CYAN, | 
						|
                'grey'   => static::BG_GREY | 
						|
            ) | 
						|
        ); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Escapes % so they don't get interpreted as color codes | 
						|
     * | 
						|
     * @param string $string String to escape | 
						|
     * | 
						|
     * @access public | 
						|
     * @return string | 
						|
     */ | 
						|
    public static function escape($string) | 
						|
    { | 
						|
        return str_replace('%', '%%', $string); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Returns true if the stream supports colorization. ANSI colors is disabled if not supported by the stream. | 
						|
     * | 
						|
     * - windows without asicon | 
						|
     * - not tty consoles | 
						|
     * | 
						|
     * @param mixed $stream | 
						|
     * @return bool true if the stream supports ANSI colors, otherwise false. | 
						|
     */ | 
						|
    public static function streamSupportsAnsiColors($stream) | 
						|
    { | 
						|
        return DIRECTORY_SEPARATOR == '\\' | 
						|
            ? null !== getenv('ANSICON') | 
						|
            : function_exists('posix_isatty') && @posix_isatty($stream); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Returns true if the console is running on windows | 
						|
     * @return bool | 
						|
     */ | 
						|
    public static function isRunningOnWindows() | 
						|
    { | 
						|
        return strtoupper(substr(PHP_OS, 0, 3)) === 'WIN'; | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Gets input from STDIN and returns a string right-trimmed for EOLs. | 
						|
     * | 
						|
     * @param bool $raw If set to true, returns the raw string without trimming | 
						|
     * | 
						|
     * @return string | 
						|
     */ | 
						|
    public static function stdin($raw = false) | 
						|
    { | 
						|
        return $raw ? fgets(STDIN) : rtrim(fgets(STDIN), PHP_EOL); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Prints text to STDOUT. | 
						|
     * | 
						|
     * @param string $text | 
						|
     * @param bool   $raw | 
						|
     * | 
						|
     * @return int|false Number of bytes printed or false on error | 
						|
     */ | 
						|
    public static function stdout($text, $raw = false) | 
						|
    { | 
						|
        if ($raw) { | 
						|
            return fwrite(STDOUT, $text); | 
						|
        } elseif (static::streamSupportsAnsiColors(STDOUT)) { | 
						|
            return fwrite(STDOUT, static::renderColoredString($text)); | 
						|
        } else { | 
						|
            return fwrite(STDOUT, static::renderColoredString($text, false)); | 
						|
        } | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Prints text to STDERR. | 
						|
     * | 
						|
     * @param string $text | 
						|
     * @param bool   $raw | 
						|
     * | 
						|
     * @return mixed Number of bytes printed or bool false on error. | 
						|
     */ | 
						|
    public static function stderr($text, $raw = false) | 
						|
    { | 
						|
        if ($raw) { | 
						|
            return fwrite(STDERR, $text); | 
						|
        } elseif (static::streamSupportsAnsiColors(STDERR)) { | 
						|
            return fwrite(STDERR, static::renderColoredString($text)); | 
						|
        } else { | 
						|
            return fwrite(STDERR, static::renderColoredString($text, false)); | 
						|
        } | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Prints text to STDERR appended with a carriage return (PHP_EOL). | 
						|
     * | 
						|
     * @param string $text | 
						|
     * @param bool   $raw | 
						|
     * | 
						|
     * @return mixed Number of bytes printed or false on error | 
						|
     */ | 
						|
    public static function error($text = null, $raw = false) | 
						|
    { | 
						|
        return static::stderr($text . PHP_EOL, $raw); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Asks the user for input. Ends when the user types a carriage return (PHP_EOL). Optionally, It also provides a | 
						|
     * prompt. | 
						|
     * | 
						|
     * @param string $prompt the prompt (optional) | 
						|
     * @return string the user's input | 
						|
     */ | 
						|
    public static function input($prompt = null) | 
						|
    { | 
						|
        if (isset($prompt)) { | 
						|
            static::stdout($prompt); | 
						|
        } | 
						|
        return static::stdin(); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Prints text to STDOUT appended with a carriage return (PHP_EOL). | 
						|
     * | 
						|
     * @param string $text | 
						|
     * @param bool $raw | 
						|
     * | 
						|
     * @return mixed Number of bytes printed or bool false on error | 
						|
     */ | 
						|
    public static function output($text = null, $raw = false) | 
						|
    { | 
						|
        return static::stdout($text . PHP_EOL, $raw); | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Prompts the user for input and validates it | 
						|
     * | 
						|
     * @param string $text prompt string | 
						|
     * @param array $options the options to validate the input: | 
						|
     *  - required: whether it is required or not | 
						|
     *  - default: default value if no input is inserted by the user | 
						|
     *  - pattern: regular expression pattern to validate user input | 
						|
     *  - validator: a callable function to validate input. The function must accept two parameters: | 
						|
     *      - $input: the user input to validate | 
						|
     *      - $error: the error value passed by reference if validation failed. | 
						|
     * @return string the user input | 
						|
     */ | 
						|
    public static function prompt($text, $options = array()) | 
						|
    { | 
						|
        $options = ArrayHelper::merge( | 
						|
            $options, | 
						|
            array( | 
						|
                'required'  => false, | 
						|
                'default'   => null, | 
						|
                'pattern'   => null, | 
						|
                'validator' => null, | 
						|
                'error'     => 'Invalid input.', | 
						|
            ) | 
						|
        ); | 
						|
        $error   = null; | 
						|
 | 
						|
        top: | 
						|
        $input = $options['default'] | 
						|
            ? static::input("$text [" . $options['default'] . ']: ') | 
						|
            : static::input("$text: "); | 
						|
 | 
						|
        if (!strlen($input)) { | 
						|
            if (isset($options['default'])) { | 
						|
                $input = $options['default']; | 
						|
            } elseif ($options['required']) { | 
						|
                static::output($options['error']); | 
						|
                goto top; | 
						|
            } | 
						|
        } elseif ($options['pattern'] && !preg_match($options['pattern'], $input)) { | 
						|
            static::output($options['error']); | 
						|
            goto top; | 
						|
        } elseif ($options['validator'] && | 
						|
            !call_user_func_array($options['validator'], array($input, &$error)) | 
						|
        ) { | 
						|
            static::output(isset($error) ? $error : $options['error']); | 
						|
            goto top; | 
						|
        } | 
						|
 | 
						|
        return $input; | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Asks the user for a simple yes/no confirmation. | 
						|
     * | 
						|
     * @param string $prompt the prompt string | 
						|
     * | 
						|
     * @return bool true or false according to user input. | 
						|
     */ | 
						|
    public static function confirm($prompt) | 
						|
    { | 
						|
        top: | 
						|
        $input = strtolower(static::input("$prompt [y/n]: ")); | 
						|
        if (!in_array(substr($input, 0, 1), array('y', 'n'))) { | 
						|
            static::output("Please, type 'y' or 'n'"); | 
						|
            goto top; | 
						|
        } | 
						|
        return $input === 'y' ? true : false; | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Gives the user an option to choose from. Giving '?' as an input will show | 
						|
     * a list of options to choose from and their explanations. | 
						|
     * | 
						|
     * @param string $prompt the prompt message | 
						|
     * @param array  $options Key-value array of options to choose from | 
						|
     * | 
						|
     * @return string An option character the user chose | 
						|
     */ | 
						|
    public static function select($prompt, $options = array()) | 
						|
    { | 
						|
        top: | 
						|
        static::stdout("$prompt [" . implode(',', array_keys($options)) . ",?]: "); | 
						|
        $input = static::stdin(); | 
						|
        if ($input === '?') { | 
						|
            foreach ($options as $key => $value) { | 
						|
                echo " $key - $value\n"; | 
						|
            } | 
						|
            echo " ? - Show help\n"; | 
						|
            goto top; | 
						|
        } elseif (!in_array($input, array_keys($options))) { | 
						|
            goto top; | 
						|
        } | 
						|
        return $input; | 
						|
    } | 
						|
 | 
						|
    /** | 
						|
     * Displays and updates a simple progress bar on screen. | 
						|
     * | 
						|
     * @param $done the number of items that are completed | 
						|
     * @param $total the total value of items that are to be done | 
						|
     * @param int $size the size of the status bar (optional) | 
						|
     * @see http://snipplr.com/view/29548/ | 
						|
     */ | 
						|
    public static function showProgress($done, $total, $size = 30) | 
						|
    { | 
						|
        static $start; | 
						|
 | 
						|
        // if we go over our bound, just ignore it | 
						|
        if ($done > $total) { | 
						|
            return; | 
						|
        } | 
						|
 | 
						|
        if (empty($start)) { | 
						|
            $start = time(); | 
						|
        } | 
						|
 | 
						|
        $now = time(); | 
						|
 | 
						|
        $percent = (double)($done / $total); | 
						|
        $bar     = floor($percent * $size); | 
						|
 | 
						|
        $status = "\r["; | 
						|
        $status .= str_repeat("=", $bar); | 
						|
        if ($bar < $size) { | 
						|
            $status .= ">"; | 
						|
            $status .= str_repeat(" ", $size - $bar); | 
						|
        } else { | 
						|
            $status .= "="; | 
						|
        } | 
						|
 | 
						|
        $display = number_format($percent * 100, 0); | 
						|
 | 
						|
        $status .= "] $display%  $done/$total"; | 
						|
 | 
						|
        $rate = ($now - $start) / $done; | 
						|
        $left = $total - $done; | 
						|
        $eta  = round($rate * $left, 2); | 
						|
 | 
						|
        $elapsed = $now - $start; | 
						|
 | 
						|
        $status .= " remaining: " . number_format($eta) . " sec.  elapsed: " . number_format($elapsed) . " sec."; | 
						|
 | 
						|
        static::stdout("$status  "); | 
						|
 | 
						|
        flush(); | 
						|
 | 
						|
        // when done, send a newline | 
						|
        if ($done == $total) { | 
						|
            echo "\n"; | 
						|
        } | 
						|
    } | 
						|
}
 | 
						|
 |