composer-update-patch

vendor/zendframework/zend-stdlib/src/ConsoleHelper.php

@@ -0,0 +1,158 @@
+<?php
+/**
+ * @link      http://github.com/zendframework/zend-stdlib for the canonical source repository
+ * @copyright Copyright (c) 2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+/**
+ * Utilities for console tooling.
+ *
+ * Provides the following facilities:
+ *
+ * - Colorize strings using markup (e.g., `<info>message</info>`,
+ *   `<error>message</error>`)
+ * - Write output to a specified stream, optionally with colorization.
+ * - Write a line of output to a specified stream, optionally with
+ *   colorization, using the system EOL sequence..
+ * - Write an error message to STDERR.
+ *
+ * Colorization will only occur when expected sequences are discovered, and
+ * then, only if the console terminal allows it.
+ *
+ * Essentially, provides the bare minimum to allow you to provide messages to
+ * the current console.
+ */
+class ConsoleHelper
+{
+    const COLOR_GREEN = "\033[32m";
+    const COLOR_RED   = "\033[31m";
+    const COLOR_RESET = "\033[0m";
+
+    const HIGHLIGHT_INFO  = 'info';
+    const HIGHLIGHT_ERROR = 'error';
+
+    private $highlightMap = [
+        self::HIGHLIGHT_INFO  => self::COLOR_GREEN,
+        self::HIGHLIGHT_ERROR => self::COLOR_RED,
+    ];
+
+    /**
+     * @var string Exists only for testing.
+     */
+    private $eol = PHP_EOL;
+
+    /**
+     * @var resource Exists only for testing.
+     */
+    private $stderr = STDERR;
+
+    /**
+     * @var bool
+     */
+    private $supportsColor;
+
+    /**
+     * @param resource $resource
+     */
+    public function __construct($resource = STDOUT)
+    {
+        $this->supportsColor = $this->detectColorCapabilities($resource);
+    }
+
+    /**
+     * Colorize a string for use with the terminal.
+     *
+     * Takes strings formatted as `<key>string</key>` and formats them per the
+     * $highlightMap; if color support is disabled, simply removes the formatting
+     * tags.
+     *
+     * @param string $string
+     * @return string
+     */
+    public function colorize($string)
+    {
+        $reset = $this->supportsColor ? self::COLOR_RESET : '';
+        foreach ($this->highlightMap as $key => $color) {
+            $pattern = sprintf('#<%s>(.*?)</%s>#s', $key, $key);
+            $color   = $this->supportsColor ? $color : '';
+            $string  = preg_replace($pattern, $color . '$1' . $reset, $string);
+        }
+        return $string;
+    }
+
+    /**
+     * @param string $string
+     * @param bool $colorize Whether or not to colorize the string
+     * @param resource $resource Defaults to STDOUT
+     * @return void
+     */
+    public function write($string, $colorize = true, $resource = STDOUT)
+    {
+        if ($colorize) {
+            $string = $this->colorize($string);
+        }
+
+        $string = $this->formatNewlines($string);
+
+        fwrite($resource, $string);
+    }
+
+    /**
+     * @param string $string
+     * @param bool $colorize Whether or not to colorize the line
+     * @param resource $resource Defaults to STDOUT
+     * @return void
+     */
+    public function writeLine($string, $colorize = true, $resource = STDOUT)
+    {
+        $this->write($string . $this->eol, $colorize, $resource);
+    }
+
+    /**
+     * Emit an error message.
+     *
+     * Wraps the message in `<error></error>`, and passes it to `writeLine()`,
+     * using STDERR as the resource; emits an additional empty line when done,
+     * also to STDERR.
+     *
+     * @param string $message
+     * @return void
+     */
+    public function writeErrorMessage($message)
+    {
+        $this->writeLine(sprintf('<error>%s</error>', $message), true, $this->stderr);
+        $this->writeLine('', false, $this->stderr);
+    }
+
+    /**
+     * @param resource $resource
+     * @return bool
+     */
+    private function detectColorCapabilities($resource = STDOUT)
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            // Windows
+            return false !== getenv('ANSICON')
+                || 'ON' === getenv('ConEmuANSI')
+                || 'xterm' === getenv('TERM');
+        }
+
+        return function_exists('posix_isatty') && posix_isatty($resource);
+    }
+
+    /**
+     * Ensure newlines are appropriate for the current terminal.
+     *
+     * @param string
+     * @return string
+     */
+    private function formatNewlines($string)
+    {
+        $string = str_replace($this->eol, "\0PHP_EOL\0", $string);
+        $string = preg_replace("/(\r\n|\n|\r)/", $this->eol, $string);
+        return str_replace("\0PHP_EOL\0", $this->eol, $string);
+    }
+}