Renamed humanId => slug.

Moved most of the slug generating code out of the framework and into core.
Remove old export files.
Use old export file until new slug is generated.
Added support for converting more special chars.

h5p.classes.php

@@ -496,12 +496,12 @@ interface H5PFrameworkInterface {
   public function setOption($name, $value);
 
   /**
-   * This will set the filtered parameters for the given content.
+   * This will update selected fields on the given content.
    *
-   * @param int $content_id
+   * @param int $id Content identifier
-   * @param string $parameters filtered
+   * @param array $fields Content fields, e.g. filtered or slug.
    */
-  public function setFilteredParameters($content_id, $parameters = '');
+  public function updateContentFields($id, $fields);
 
   /**
    * Will clear filtered params for all the content that uses the specified
@@ -529,11 +529,12 @@ interface H5PFrameworkInterface {
   public function getNumContent($libraryId);
 
   /**
-   * Generate an easy human readable identifier for the given content.
+   * Determines if content slug is used.
    *
-   * @param array $content assoc
+   * @param string $slug
+   * @return boolean
    */
-  public function generateHumanReadableContentIdentifier($content);
+  public function isContentSlugAvailable($slug);
 }
 
 /**
@@ -1476,7 +1477,7 @@ Class H5PExport {
   public function createExportFile($content) {
     $h5pDir = $this->h5pF->getH5pPath() . DIRECTORY_SEPARATOR;
     $tempPath = $h5pDir . 'temp' . DIRECTORY_SEPARATOR . $content['id'];
-    $zipPath = $h5pDir . 'exports' . DIRECTORY_SEPARATOR . $content['humanId'] . '.h5p';
+    $zipPath = $h5pDir . 'exports' . DIRECTORY_SEPARATOR . $content['slug'] . '.h5p';
 
     // Temp dir to put the h5p files in
     @mkdir($tempPath, 0777, TRUE);
@@ -1698,7 +1699,7 @@ class H5PCore {
    * @return Object NULL on failure.
    */
   public function filterParameters(&$content) {
-    if (isset($content['filtered']) && $content['filtered'] !== '' && $content['humanId']) {
+    if (isset($content['filtered']) && $content['filtered'] !== '') {
       return $content['filtered'];
     }
 
@@ -1720,8 +1721,14 @@ class H5PCore {
       $this->h5pF->deleteLibraryUsage($content['id']);
       $this->h5pF->saveLibraryUsage($content['id'], $content['dependencies']);
 
-      if (!$content['humanId']) {
+      if (!$content['slug']) {
-        $content['humanId'] = $this->h5pF->generateHumanReadableContentIdentifier($content);
+        $content['slug'] = $this->generateContentSlug($content);
+
+        // Remove old export file
+        $oldExport = $this->h5pF->getH5pPath() . '/exports/' . $content['id'] . '.h5p';
+        if (file_exists($oldExport)) {
+          unlink($oldExport);
+        }
       }
 
       if ($this->exportEnabled) {
@@ -1733,11 +1740,41 @@ class H5PCore {
       }
 
       // Cache.
-      $this->h5pF->setFilteredParameters($content['id'], $params, $content['humanId']);
+      $this->h5pF->updateContentFields($content['id'], array(
+        'filtered' => $params,
+        'slug' => $content['slug']
+      ));
     }
     return $params;
   }
 
+  /**
+   * Generate content slug
+   *
+   * @param array $content object
+   * @return string unique content slug
+   */
+  private function generateContentSlug($content) {
+    $slug = H5PCore::slugify($content['title']);
+
+    $available = NULL;
+    while (!$available) {
+      if ($available === FALSE) {
+        // If not available, add number suffix.
+        $matches = array();
+        if (preg_match('/(.+-)([0-9]+)$/', $slug, $matches)) {
+          $slug = $matches[1] . (intval($matches[2]) + 1);
+        }
+        else {
+          $slug .=  '-2';
+        }
+      }
+      $available = $this->h5pF->isContentSlugAvailable($slug);
+    }
+
+    return $slug;
+  }
+
   /**
    * Find the files required for this content to work.
    *
@@ -2300,20 +2337,20 @@ class H5PCore {
   }
 
   /**
-   * Convert strings of text to a simple kebab case.
+   * Convert strings of text into simple kebab case slugs.
    * Very useful for readable urls etc.
    *
    * @param string $input
    * @return string
    */
-  public static function kebabize($input) {
+  public static function slugify($input) {
     // Down low
     $input = strtolower($input);
 
     // Replace common chars
     $input = str_replace(
-      array('æ',  'ø',  'ö', 'ó', 'ô', 'œ',  'å', 'ä', 'á', 'à', 'â', 'ç', 'é', 'è', 'ê', 'ë', 'í', 'î', 'ï', 'ú', 'ñ', 'ü', 'ù', 'û', 'ß'),
+      array('æ',  'ø',  'ö', 'ó', 'ô', 'Ò',  'Õ', 'Ý', 'ý', 'ÿ', 'ā', 'ă', 'ą', 'œ', 'å', 'ä', 'á', 'à', 'â', 'ã', 'ç', 'ć', 'ĉ', 'ċ', 'č', 'é', 'è', 'ê', 'ë', 'í', 'ì', 'î', 'ï', 'ú', 'ñ', 'ü', 'ù', 'û', 'ß',  'ď', 'đ', 'ē', 'ĕ', 'ė', 'ę', 'ě', 'ĝ', 'ğ', 'ġ', 'ģ', 'ĥ', 'ħ', 'ĩ', 'ī', 'ĭ', 'į', 'ı', 'ij',  'ĵ', 'ķ', 'ĺ', 'ļ', 'ľ', 'ŀ', 'ł', 'ń', 'ņ', 'ň', 'ʼn', 'ō', 'ŏ', 'ő', 'ŕ', 'ŗ', 'ř', 'ś', 'ŝ', 'ş', 'š', 'ţ', 'ť', 'ŧ', 'ũ', 'ū', 'ŭ', 'ů', 'ű', 'ų', 'ŵ', 'ŷ', 'ź', 'ż', 'ž', 'ſ', 'ƒ', 'ơ', 'ư', 'ǎ', 'ǐ', 'ǒ', 'ǔ', 'ǖ', 'ǘ', 'ǚ', 'ǜ', 'ǻ', 'ǽ',  'ǿ'),
-      array('ae', 'oe', 'o', 'o', 'o', 'oe', 'a', 'a', 'a', 'a', 'a', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'u', 'n', 'u', 'u', 'u', 'es'),
+      array('ae', 'oe', 'o', 'o', 'o', 'oe', 'o', 'o', 'y', 'y', 'y', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'c', 'c', 'c', 'c', 'c', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i', 'u', 'n', 'u', 'u', 'u', 'es', 'd', 'd', 'e', 'e', 'e', 'e', 'e', 'g', 'g', 'g', 'g', 'h', 'h', 'i', 'i', 'i', 'i', 'i', 'ij', 'j', 'k', 'l', 'l', 'l', 'l', 'l', 'n', 'n', 'n', 'n', 'o', 'o', 'o', 'r', 'r', 'r', 's', 's', 's', 's', 't', 't', 't', 'u', 'u', 'u', 'u', 'u', 'u', 'w', 'y', 'z', 'z', 'z', 's', 'f', 'o', 'u', 'a', 'i', 'o', 'u', 'u', 'u', 'u', 'u', 'a', 'ae', 'oe'),
       $input);
 
     // Replace everything else
@@ -2323,10 +2360,15 @@ class H5PCore {
     $input = preg_replace('/-{2,}/', '-', $input);
 
     // Prevent hyphen in beginning or end
-    $input = preg_replace('/^-|-$/', '', $input);
+    $input = trim($input, '-');
 
+    // Prevent to long slug
+    if (strlen($input) > 91) {
+      $inputsubstr($input, 0, 92);
+    }
+
+    // Prevent empty slug
     if ($input === '') {
-      // Use default string
       $input = 'interactive';
     }