new pisilinux web sites

Internal/package-zerocore/Robots.php

@@ -0,0 +1,112 @@
+<?php namespace ZN;
+/**
+ * ZN PHP Web Framework
+ * 
+ * "Simplicity is the ultimate sophistication." ~ Da Vinci
+ * 
+ * @package ZN
+ * @license MIT [http://opensource.org/licenses/MIT]
+ * @author  Ozan UYKUN [ozan@znframework.com]
+ */
+
+class Robots
+{   
+    /**
+     * Robots file
+     * 
+     * @var string
+     */
+    protected static $file = 'robots.txt';
+
+    /**
+     * Creates robots.txt
+     */
+    public static function create()
+    {
+        $rules  = Config::get('Robots', 'rules');
+        $robots = '';
+
+        if( IS::array($rules) ) foreach( $rules as $key => $val )
+        {
+            # Single usage
+            if( ! is_numeric($key) )
+            {
+                self::createFileContent($key, $val, $robots);
+            }
+            # Multi usage
+            else
+            {
+                if( IS::array($val) ) foreach( $val as $r => $v ) 
+                {
+                    self::createFileContent($r, $v, $robots);
+                }
+            }
+        }
+
+        # If the content to be written is the same, rewriting is not performed.
+        if( trim($robots) === self::getContent() )
+        {
+            return false;
+        }
+
+        # The contents of the robot file are created.
+        return (bool) self::putContent($robots);
+    }
+
+    /**
+     * Protected get file path
+     */
+    protected static function getFilePath()
+    {
+        $file = self::$file;
+
+        if( defined('ZN_SHARED_DIR') )
+        {
+            $file = ZN_SHARED_DIR . $file; // @codeCoverageIgnore
+        }
+
+        return $file;
+    }
+
+    /**
+     * Protected put robots content
+     */
+    protected static function putContent($robots)
+    {
+        return file_put_contents(self::getFilePath(), trim($robots));
+    }
+
+    /**
+     * Protected get robots content
+     */
+    protected static function getContent()
+    {
+        if( is_file($file = self::getFilePath()) )
+        {
+           return trim(file_get_contents($file));
+        }
+        
+        return '';
+    }
+
+    /**
+     * Protected create robots file content
+     */
+    protected static function createFileContent($key, $val, &$robots)
+    {
+        switch( $key )
+        {
+            case 'userAgent':
+                $robots .= ! empty( $val ) ? 'User-agent: ' . $val . EOL : '';
+            break;
+
+            case 'allow'    :
+            case 'disallow' :
+                if( ! empty($val) ) foreach( $val as $v )
+                {
+                    $robots .= ucfirst($key) . ': ' . $v . EOL;
+                }
+            break;
+        }
+    }
+}