Add Cli color support

Author: JBlond

composer.json

@@ -23,7 +23,8 @@
     ],
     "require": {
         "php": ">=7.2",
-        "ext-mbstring": "*"
+        "ext-mbstring": "*",
+        "jblond/php-cli": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "8.*",

example/cli.php

@@ -0,0 +1,29 @@
+<?php
+
+use jblond\cli\Cli;
+use jblond\Diff;
+use jblond\Diff\Renderer\Text\UnifiedCli;
+
+// Include and instantiate autoloader.
+require '../vendor/autoload.php';
+
+// Include two sample files for comparison.
+$a = file_get_contents(dirname(__FILE__) . '/a.txt');
+$b = file_get_contents(dirname(__FILE__) . '/b.txt');
+
+$customOptions = [
+    'context'          => 2,
+    'trimEqual'        => false,
+    'ignoreWhitespace' => true,
+    'ignoreCase'       => true,
+];
+
+// Choose one of the initializations.
+$diff = new Diff($a, $b);
+
+
+// Generate a unified diff.
+// \jblond\Diff\Renderer\Text
+$renderer = new UnifiedCli();
+$cli = new Cli();
+$cli->output($diff->render($renderer));

lib/jblond/Diff/Renderer/Text/UnifiedCli.php

@@ -0,0 +1,90 @@
+<?php
+
+namespace jblond\Diff\Renderer\Text;
+
+use jblond\cli\CliColors;
+use jblond\Diff\Renderer\RendererAbstract;
+
+/**
+ * Unified diff generator for PHP DiffLib.
+ *
+ * PHP version 7.2 or greater
+ *
+ * @package  jblond\Diff\Renderer\Text
+ * @author Mario Brandt <[email protected]>
+ * @license New BSD License http://www.opensource.org/licenses/bsd-license.php
+ * @version 1.18
+ * @link https://github.com/JBlond/php-diff
+ */
+
+class UnifiedCli extends RendererAbstract
+{
+
+    /**
+     * @var CliColors
+     */
+    private $colors;
+
+    /**
+     * UnifiedCli constructor.
+     * @param array $options
+     */
+    public function __construct(array $options = [])
+    {
+        parent::__construct($options);
+        $this->colors = new CliColors();
+    }
+
+    /**
+     * Render and return a unified diff.
+     *
+     * @return string Direct Output to the console
+     */
+    public function render(): string
+    {
+        $diff = '';
+        $opCodes = $this->diff->getGroupedOpCodes();
+        foreach ($opCodes as $group) {
+            $lastItem = count($group) - 1;
+            $i1 = $group['0']['1'];
+            $i2 = $group[$lastItem]['2'];
+            $j1 = $group['0']['3'];
+            $j2 = $group[$lastItem]['4'];
+
+            if ($i1 == 0 && $i2 == 0) {
+                $i1 = -1;
+                $i2 = -1;
+            }
+
+            $diff .= $this->colors->getColoredString(
+                '@@ -' . ($i1 + 1) . ',' . ($i2 - $i1) . ' +' . ($j1 + 1) . ',' . ($j2 - $j1) . " @@\n",
+                'purple'
+            );
+            foreach ($group as [$tag, $i1, $i2, $j1, $j2]) {
+                if ($tag == 'equal') {
+                    $diff .= $this->colors->getColoredString(' ' .
+                        implode(
+                            "\n ",
+                            $this->diff->getArrayRange($this->diff->getVersion1(), $i1, $i2)
+                        ) . "\n", 'grey');
+                    continue;
+                }
+                if ($tag == 'replace' || $tag == 'delete') {
+                    $diff .= $this->colors->getColoredString('-' .
+                        implode(
+                            "\n- ",
+                            $this->diff->getArrayRange($this->diff->getVersion1(), $i1, $i2)
+                        ) . "\n", 'red');
+                }
+                if ($tag == 'replace' || $tag == 'insert') {
+                    $diff .= $this->colors->getColoredString('+' .
+                        implode(
+                            "\n+",
+                            $this->diff->getArrayRange($this->diff->getVersion2(), $j1, $j2)
+                        ) . "\n", 'green');
+                }
+            }
+        }
+        return $diff;
+    }
+}