1 files changed, 74 insertions, 0 deletions
diff --git a/modules/gallery/libraries/Breadcrumb.php b/modules/gallery/libraries/Breadcrumb.php
new file mode 100644
index 00000000..3a2499ba
--- /dev/null
+++ b/modules/gallery/libraries/Breadcrumb.php
@@ -0,0 +1,74 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2011 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class Breadcrumb_Core {
+  public $title;
+  public $url;
+  public $id;
+  public $first;
+  public $last;
+
+  static function build_from_item($item) {
+    $breadcrumbs = array();
+    foreach ($item->parents() as $element) {
+      $breadcrumbs[] = new Breadcrumb($element->title, $element->url(), $element->id);
+    }
+
+    if (!empty($breadcrumbs)) {
+      $breadcrumbs[] = new Breadcrumb($item->title, $item->url(), $item->id);
+    }
+
+    return self::generate_show_query_strings($breadcrumbs);
+  }
+
+  /**
+   * This static function takes a list (variable arguments) of Breadcrumbs and builds a dynamic
+   * breadcrumb list.  Used to create a breadcrumb for dynamic albums. Will really be useful
+   * for the display context change.
+   */
+  static function build_from_list() {
+    return self::generate_show_query_strings(func_get_args());
+  }
+
+  private static function generate_show_query_strings($breadcrumbs) {
+    if (!empty($breadcrumbs)) {
+
+      end($breadcrumbs)->last = true;;
+      while ($breadcrumb = current($breadcrumbs)) {
+        if (isset($last_id) && $last_id > 0) {
+          $query = parse_url($breadcrumb->url, PHP_URL_QUERY);
+          $breadcrumb->url =  $breadcrumb->url . ($query ? "&" : "?") . "show={$last_id}";
+        }
+        $last_id = $breadcrumb->id;
+        $breadcrumb = prev($breadcrumbs);
+      }
+      $breadcrumbs[0]->first = true;
+    }
+
+    return $breadcrumbs;
+  }
+
+  public function __construct($title, $url, $id=0) {
+    $this->title = $title;
+    $this->url = $url;
+    $this->id = $id;
+    $this->first = false;
+    $this->last = false;
+  }
+}