Add output formats to our REST controllers. Add support for JSON and

XML to the comment controllers as a proof of concept.  It's not fully
baked; we should examine ways to create helpers to make this process
easier.

3 files changed, 45 insertions, 20 deletions

diff --git a/modules/comment/controllers/comment.php b/modules/comment/controllers/comment.php
index 9a9ce84e..546f3d67 100644
--- a/modules/comment/controllers/comment.php
+++ b/modules/comment/controllers/comment.php
@@ -31,14 +31,26 @@ class Comment_Controller extends REST_Controller {
 
   /**
    * Get an existing comment.
-   *  @see Rest_Controller::_get($resource)
+   *  @see Rest_Controller::_get($resource, $output_format)
    */
-  public function _get($comment) {
-    $v = new View("comment.html");
-    $v->comment = $comment;
-    print $v;
+  public function _get($comment, $output_format) {
+    switch ($output_format) {
+    case "xml":
+      print xml::to_xml($comment->as_array(), array("comment"));
+      break;
+
+    case "json":
+      print json_encode($comment->as_array());
+      break;
+
+    default:
+      $v = new View("comment.$output_format");
+      $v->comment = $comment;
+      print $v;
+    }
   }
 
+
   /**
    * Update existing comment.
    *  @see Rest_Controller::_put($resource)
@@ -46,7 +58,6 @@ class Comment_Controller extends REST_Controller {
   public function _put($comment) {
     $form = comment::get_edit_form($comment);
     if ($form->validate()) {
-      $comment = ORM::factory('comment');
       $comment->author = $this->input->post('author');
       $comment->email = $this->input->post('email');
       $comment->text = $this->input->post('text');
diff --git a/modules/comment/controllers/comments.php b/modules/comment/controllers/comments.php
index 60ab9b5d..ab3be76f 100644
--- a/modules/comment/controllers/comments.php
+++ b/modules/comment/controllers/comments.php
@@ -31,10 +31,10 @@ class Comments_Controller extends REST_Controller {
 
   /**
    * Show the comment collection
-   *  @see Rest_Controller::_get($resource)
+   *  @see Rest_Controller::_get($resource, $format)
    */
-  public function _get($item) {
-    print comment::get_comments($item);
+  public function _get($item, $output_format) {
+    print comment::get_comments($item, $output_format);
   }
 
   /**
diff --git a/modules/comment/helpers/comment.php b/modules/comment/helpers/comment.php
index b5d57829..0bfd08d0 100644
--- a/modules/comment/helpers/comment.php
+++ b/modules/comment/helpers/comment.php
@@ -96,7 +96,7 @@ class Comment_Core {
     $block = new Block;
     $block->id = "gComment";
     $block->title = _("Comments");
-    $block->content = comment::get_comments($theme->item());
+    $block->content = comment::get_comments($theme->item(), "html");
 
     if ($show_add_form) {
       $block->content .= comment::get_add_form($theme->item())->render("form.html");
@@ -104,17 +104,31 @@ class Comment_Core {
     return $block;
   }
 
-  static function get_comments($item) {
-    $comments = array("<ul>");
-    foreach (ORM::factory('comment')->where('item_id', $item->id)
-             ->orderby('datetime', 'asc')
-             ->find_all() as $comment) {
-      $v = new View("comment.html");
-      $v->comment = $comment;
-      $comments[] = $v;
+  static function get_comments($item, $output_format) {
+    $comments = ORM::factory('comment')->where('item_id', $item->id)
+      ->orderby('datetime', 'asc')
+      ->find_all();
+
+    switch ($output_format) {
+    case "xml":
+      return xml::to_xml($comments, array("comments", "comment"));
+      break;
+
+    case "json":
+      foreach ($comments as $comment) {
+        $data[] = $comment->as_array();
+      }
+      return json_encode($data);
+
+    default:
+      $html = array("<ul>");
+      foreach ($comments as $comment) {
+        $v = new View("comment.html");
+        $v->comment = $comment;
+        $html[] = $v;
+      }
+      return "<ul>\n" . implode("\n", $html) . "</ul>\n";
     }
-    $comments[] = "</ul>";
-    return implode("\n", $comments);
   }
 
   /**