Merge pull request #230 from nigelgbanks/7.x-allow-viewers-based-on-content-type

7.x allow viewers based on content type

includes/solution_packs.inc

@@ -435,17 +435,26 @@ function islandora_check_object_status(NewFedoraObject $object_definition) {
 /**
  * A form construct to create a viewer selection table.
  *
+ * The list of selectable viewers is limited by the $mimetype and the $model
+ * parameters. When neither are given all defined viewers are listed. If only
+ * $mimetype is given only viewers that support that mimetype will be listed,
+ * the same goes for the $model parameter. If both are given, than any viewer
+ * that supports either the give $mimetype or $model will be listed.
+ *
  * @param string $variable_id
  *   The ID of the Drupal variable to save the viewer settings in
  * @param string $mimetype
  *   The table will be populated with viewers supporting this mimetype
+ * @param string $model
+ *   The table will be populated with viewers supporting this content model
+ *
  * @return
  *   A form api array which defines a themed table to select a viewer.
  */
-function islandora_viewers_form($variable_id = NULL, $mimetype = NULL) {
+function islandora_viewers_form($variable_id = NULL, $mimetype = NULL, $model = NULL) {
   $form = array();
   // get viewers
-  $viewers = islandora_get_viewers($mimetype);
+  $viewers = islandora_get_viewers($mimetype, $model);
   if (!empty($viewers)) {
     // add option for no viewer
     $no_viewer = array();
@@ -524,19 +533,32 @@ function islandora_viewers_form($variable_id = NULL, $mimetype = NULL) {
 /**
  * Returns all defined viewers.
  *
+ * The list of selectable viewers is limited by the $mimetype and the
+ * $content_model parameters. When neither are given all defined viewers are
+ * listed. If only $mimetype is given only viewers that support that mimetype
+ * will be listed, the same goes for the $content_model parameter. If both are
+ * given, than any viewer that supports either the give $mimetype or $model will
+ * be listed.
+ *
  * @param string $mimetype
- *  specify a mimetype to return only viewers that support this certain
+ *  Specify a mimetype to return only viewers that support this certain
  *  mimetype.
- * @return
- *  array of viewer definitions, or FALSE if none are found.
+ * @param string $content_model
+ *  Specify a content model to return only viewers that support the content
+ *  model.
+ *
+ * @return array
+ *  Viewer definitions, or FALSE if none are found.
  */
-function islandora_get_viewers($mimetype = NULL) {
+function islandora_get_viewers($mimetype = NULL, $content_model = NULL) {
   $viewers = array();
   // get all viewers
   $defined_viewers = module_invoke_all('islandora_viewer_info');
   // filter viewers by mimetype
   foreach ($defined_viewers as $key => $value) {
-    if (in_array($mimetype, $value['mimetype']) OR $mimetype == NULL) {
+    $value['mimetype'] = isset($value['mimetype']) ? $value['mimetype'] : array();
+    $value['model'] = isset($value['model']) ? $value['model'] : array();
+    if (in_array($mimetype, $value['mimetype']) OR in_array($content_model, $value['model'])) {
       $viewers[$key] = $value;
     }
   }