1 files changed, 157 insertions, 0 deletions
diff --git a/platform/www/lib/plugins/pageredirect/syntax.php b/platform/www/lib/plugins/pageredirect/syntax.php
new file mode 100644
index 0000000..4b34a9c
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+++ b/platform/www/lib/plugins/pageredirect/syntax.php
@@ -0,0 +1,157 @@
+<?php
+/**
+ * DokuWiki Plugin pageredirect (Syntax Component)
+ *
+ * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
+ * @author  Elan Ruusamäe <glen@delfi.ee>
+ * @author  David Lorentsen <zyberdog@quakenet.org>
+ */
+
+// must be run within Dokuwiki
+if(!defined('DOKU_INC')) die();
+
+class syntax_plugin_pageredirect extends DokuWiki_Syntax_Plugin {
+    /**
+     * @return string Syntax mode type
+     */
+    public function getType() {
+        return 'substition';
+    }
+
+    /**
+     * @return string Paragraph type
+     */
+    public function getPType() {
+        return 'block';
+    }
+
+    /**
+     * @return int Sort order - Low numbers go before high numbers
+     */
+    public function getSort() {
+        return 1;
+    }
+
+    /**
+     * Connect lookup pattern to lexer.
+     *
+     * @param string $mode Parser mode
+     */
+    public function connectTo($mode) {
+        // NOTE: each document is surrounted with \n by dokuwiki parser
+        // so it's safe to use \n in the pattern
+        // this fixes creole greedyness:
+        // https://github.com/glensc/dokuwiki-plugin-pageredirect/issues/18#issuecomment-249386268
+        $this->Lexer->addSpecialPattern('(?:~~REDIRECT>.+?~~|\n#(?i:redirect) [^\r\n]+)', $mode, 'plugin_pageredirect');
+    }
+
+    /**
+     * Handler to prepare matched data for the rendering process
+     *
+     * This function can only pass data to render() via its return value
+     * render() may be not be run during the object's current life.
+     *
+     * Usually you should only need the $match param.
+     *
+     * @param   string       $match   The text matched by the patterns
+     * @param   int          $state   The lexer state for the match
+     * @param   int          $pos     The character position of the matched text
+     * @param   Doku_Handler $handler Reference to the Doku_Handler object
+     * @return  array Return an array with all data you want to use in render
+     */
+    public function handle($match, $state, $pos, Doku_Handler $handler) {
+        // strip leading "\n" from creole-compatible pattern
+        $match = trim($match);
+
+        // extract target page from match pattern
+        if($match[0] == '#') {
+            # #REDIRECT PAGE
+            $id = substr($match, 10);
+        } else {
+            # ~~REDIRECT>PAGE~~
+            $id = substr($match, 11, -2);
+        }
+        $id = trim($id);
+
+        $is_external = preg_match('#^https?://#i', $id);
+
+        // resolve and clean the $id if it is not external
+        if(!$is_external) {
+            global $ID;
+            resolve_pageid(getNS($ID), $id, $exists);
+        }
+
+        return array($id, $is_external);
+    }
+
+    /**
+     * Handles the actual output creation.
+     *
+     * The function must not assume any other of the classes methods have been run
+     * during the object's current life. The only reliable data it receives are its
+     * parameters.
+     *
+     * The function should always check for the given output format and return false
+     * when a format isn't supported.
+     *
+     * $renderer contains a reference to the renderer object which is
+     * currently handling the rendering. You need to use it for writing
+     * the output. How this is done depends on the renderer used (specified
+     * by $format
+     *
+     * The contents of the $data array depends on what the handler() function above
+     * created
+     *
+     * @param string        $format   output format being rendered
+     * @param Doku_Renderer $renderer reference to the current renderer object
+     * @param array         $data     data created by handler()
+     * @return boolean return true if rendered correctly
+     */
+    public function render($format, Doku_Renderer $renderer, $data) {
+        if($format == 'xhtml') {
+            // add prepared note about redirection
+            $renderer->doc .= $this->redirect_message($data);
+
+            // hook into the post render event to allow the page to be redirected
+            global $EVENT_HANDLER;
+            /** @var action_plugin_pageredirect $action */
+            $action = plugin_load('action', 'pageredirect');
+            $EVENT_HANDLER->register_hook('TPL_ACT_RENDER', 'AFTER', $action, 'handle_dokuwiki_started');
+
+            return true;
+        }
+
+        if($format == 'metadata') {
+            // add redirection to metadata
+            $renderer->meta['relation']['isreplacedby'] = $data;
+            if (!$data[1]) {
+                $page = preg_split("/\?|#/", $data[0])[0];
+                $renderer->meta['relation']['references'][$page] = page_exists($page);
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Create redirection message html
+     *
+     * @param string $page
+     * @return string
+     */
+    private function redirect_message($metadata) {
+        list($page, $is_external) = $metadata;
+        if(!$is_external) {
+            $link = html_wikilink($page);
+        } else {
+            $link = '<a href="' . hsc($page) . '" class="urlextern">' . hsc($page) . '</a>';
+        }
+
+        // prepare message here instead of in render
+        $message = '<div class="noteredirect">' . sprintf($this->getLang('redirect_to'), $link) . '</div>';
+
+        return $message;
+    }
+}