Implement Shortcodes #7

rawilum/Pages.php

@@ -141,7 +141,7 @@ class Pages
 
     public function parseContent($content)
     {
-        $content = Shortcode::parse($content);
+        $content = $this->rawilum['shortcodes']->parse($content);
         $content = $this->rawilum['markdown']->text($content);
 
         return $content;

rawilum/Rawilum.php

@@ -45,6 +45,10 @@ class Rawilum extends Container
         // Create container
         $container = new static();
 
+        $container['markdown'] = function ($c) {
+            return new ParsedownExtra();
+        };
+
         $container['filesystem'] = function ($c) {
             return new Filesystem();
         };
@@ -61,6 +65,10 @@ class Rawilum extends Container
             return new Config($c);
         };
 
+        $container['shortcodes'] = function ($c) {
+            return new Shortcodes($c);
+        };
+
         $container['events'] = function ($c) {
             return new Events($c);
         };
@@ -69,10 +77,6 @@ class Rawilum extends Container
             return new Filters($c);
         };
 
-        $container['markdown'] = function ($c) {
-            return new ParsedownExtra();
-        };
-
         $container['i18n'] = function ($c) {
             return new I18n($c);
         };

rawilum/Shortcodes.php

@@ -0,0 +1,133 @@
+<?php
+namespace Rawilum;
+
+/**
+ * This file is part of the Rawilum.
+ *
+ * (c) Romanenko Sergey / Awilum <awilum@msn.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+class Shortcodes
+{
+    /**
+     * @var Rawilum
+     */
+    protected $rawilum;
+
+    /**
+     * Shortcode tags array
+     *
+     * @var shortcode_tags
+     */
+    protected $shortcode_tags = array();
+
+    /**
+     * Construct
+     */
+    public function __construct(Rawilum $c)
+    {
+        $this->rawilum = $c;
+    }
+
+    /**
+     * Add new shortcode
+     *
+     * @param string $shortcode         Shortcode tag to be searched in content.
+     * @param string $callback_function The callback function to replace the shortcode with.
+     */
+    public function add(string $shortcode, $callback_function)
+    {
+        // Add new shortcode
+        if (is_callable($callback_function)) {
+            $this->shortcode_tags[$shortcode] = $callback_function;
+        }
+    }
+
+    /**
+     * Remove a specific registered shortcode.
+     *
+     * @param string $shortcode Shortcode tag.
+     */
+    public function delete(string $shortcode)
+    {
+        // Delete shortcode
+        if ($this->exists($shortcode)) {
+            unset($this->shortcode_tags[$shortcode]);
+        }
+    }
+
+    /**
+     * Remove all registered shortcodes.
+     *
+     *  <code>
+     *      Shortcode::clear();
+     *  </code>
+     *
+     */
+    public function clear()
+    {
+        $this->shortcode_tags = array();
+    }
+
+    /**
+     * Check if a shortcode has been registered.
+     *
+     * @param string $shortcode Shortcode tag.
+     */
+    public function exists(string $shortcode)
+    {
+        // Check shortcode
+        return array_key_exists($shortcode, $this->shortcode_tags);
+    }
+
+    /**
+     * Parse a string, and replace any registered shortcodes within it with the result of the mapped callback.
+     *
+     * @param  string $content Content
+     * @return string
+     */
+    public function parse(string $content)
+    {
+        if (! $this->shortcode_tags) {
+            return $content;
+        }
+
+        $shortcodes = implode('|', array_map('preg_quote', array_keys($this->shortcode_tags)));
+        $pattern    = "/(.?)\{([$shortcodes]+)(.*?)(\/)?\}(?(4)|(?:(.+?)\{\/\s*\\2\s*\}))?(.?)/s";
+
+        return preg_replace_callback($pattern, array($this, '_handle'), $content);
+    }
+
+    /**
+     * _handle()
+     */
+    protected function _handle($matches)
+    {
+        $prefix    = $matches[1];
+        $suffix    = $matches[6];
+        $shortcode = $matches[2];
+
+        // Allow for escaping shortcodes by enclosing them in {{shortcode}}
+        if ($prefix == '{' && $suffix == '}') {
+            return substr($matches[0], 1, -1);
+        }
+
+        $attributes = array(); // Parse attributes into into this array.
+
+        if (preg_match_all('/(\w+) *= *(?:([\'"])(.*?)\\2|([^ "\'>]+))/', $matches[3], $match, PREG_SET_ORDER)) {
+            foreach ($match as $attribute) {
+                if (! empty($attribute[4])) {
+                    $attributes[strtolower($attribute[1])] = $attribute[4];
+                } elseif (! empty($attribute[3])) {
+                    $attributes[strtolower($attribute[1])] = $attribute[3];
+                }
+            }
+        }
+
+        // Check if this shortcode realy exists then call user function else return empty string
+        return (isset($this->shortcode_tags[$shortcode])) ? $prefix . call_user_func($this->shortcode_tags[$shortcode], $attributes, $matches[5], $shortcode) . $suffix : '';
+    }
+}