Create symmetrical relationship collections: item_tags and tag_items

Now when we represent a relationship collection we can refer to it in
proper semantic terms.

3 files changed, 104 insertions, 1 deletions

diff --git a/modules/tag/helpers/item_tags_rest.php b/modules/tag/helpers/item_tags_rest.php
new file mode 100644
index 00000000..385d06e8
--- /dev/null
+++ b/modules/tag/helpers/item_tags_rest.php
@@ -0,0 +1,51 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2009 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 item_tags_rest_Core {
+  static function get($request) {
+    $item = rest::resolve($request->url);
+    $tags = array();
+    foreach (tag::item_tags($item) as $tag) {
+      $tags[] = rest::url("tag_item", $tag, $item);
+    }
+
+    return array(
+      "url" => $request->url,
+      "members" => $tags);
+  }
+
+  static function delete($request) {
+    list ($tag, $item) = rest::resolve($request->url);
+    $tag->remove($item);
+    $tag->save();
+  }
+
+  static function resolve($id) {
+    $item = ORM::factory("item")->where("id", "=", $id)->find();
+    if (!access::can("view", $item)) {
+      throw new Kohana_404_Exception();
+    }
+
+    return $item;
+  }
+
+  static function url($item) {
+    return url::abs_site("rest/item_tags/{$item->id}");
+  }
+}
diff --git a/modules/tag/helpers/tag_items_rest.php b/modules/tag/helpers/tag_items_rest.php
new file mode 100644
index 00000000..2a00c565
--- /dev/null
+++ b/modules/tag/helpers/tag_items_rest.php
@@ -0,0 +1,48 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2009 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class tag_items_rest_Core {
+  static function get($request) {
+    $tag = rest::resolve($request->url);
+    $items = array();
+    foreach ($tag->items() as $item) {
+      if (access::can("view", $item)) {
+        $items[] = rest::url("tag_item", $tag, $item);
+      }
+    }
+
+    return array(
+      "url" => $request->url,
+      "members" => $items);
+  }
+
+  static function delete($request) {
+    list ($tag, $item) = rest::resolve($request->url);
+    $tag->remove($item);
+    $tag->save();
+  }
+
+  static function resolve($id) {
+    return ORM::factory("tag")->where("id", "=", $id)->find();
+  }
+
+  static function url($tag) {
+    return url::abs_site("rest/tag_items/{$tag->id}");
+  }
+}
diff --git a/modules/tag/helpers/tag_rest.php b/modules/tag/helpers/tag_rest.php
index 5feeb756..4fe9bef9 100644
--- a/modules/tag/helpers/tag_rest.php
+++ b/modules/tag/helpers/tag_rest.php
@@ -31,6 +31,7 @@ class tag_rest_Core {
       "url" => $request->url,
       "resource" => $tag->as_array(),
       "relationships" => array(
+        "url" => rest::url("tag_items", $tag),
         "items" => $tag_items));
   }
 
@@ -67,7 +68,10 @@ class tag_rest_Core {
       foreach (tag::item_tags($resource) as $tag) {
         $tags[] = rest::url("tag_item", $tag, $resource);
       }
-      return array("tags" => $tags);
+      return array(
+        "tags" => array(
+          "url" => rest::url("item_tags", $resource),
+          "members" => $tags));
     }
   }