Add info section with MPTT graphs

2 files changed, 39 insertions, 0 deletions

diff --git a/core/controllers/welcome.php b/core/controllers/welcome.php
index f421ffc5..c8b76a0f 100644
--- a/core/controllers/welcome.php
+++ b/core/controllers/welcome.php
@@ -45,6 +45,34 @@ class Welcome_Controller extends Template_Controller {
     url::redirect("welcome");
   }
 
+  function mptt() {
+    $this->auto_render = false;
+    $items = ORM::factory("item")->orderby("id")->find_all();
+    $data = "digraph G {\n";
+    foreach ($items as $item) {
+      $data .= "  $item->parent_id -> $item->id\n";
+      $data .= "  $item->id [label=\"$item->id <$item->left, $item->right>\"]\n";
+    }
+    $data .= "}\n";
+
+    if ($this->input->get("type") == "text") {
+      print "<pre>$data";
+    } else {
+      $proc = proc_open("/usr/bin/dot -Tsvg",
+			array(array("pipe", "r"),
+			      array("pipe", "w")),
+			$pipes,
+			VARPATH . "tmp");
+      fwrite($pipes[0], $data);
+      fclose($pipes[0]);
+
+      header("Content-Type: image/svg+xml");
+      print(stream_get_contents($pipes[1]));
+      fclose($pipes[1]);
+      proc_close($proc);
+    }
+  }
+
   function add($count) {
     srand(time());
     $parents = ORM::factory("item")->where("type", "album")->find_all()->as_array();
diff --git a/core/views/welcome.html.php b/core/views/welcome.html.php
index 4bd0ef90..af4cb68b 100644
--- a/core/views/welcome.html.php
+++ b/core/views/welcome.html.php
@@ -132,6 +132,7 @@
         <ul id="tabs">
           <li><a href="javascript:show('#configuration')">Configuration</a></li>
           <li><a href="javascript:show('#actions')">Actions</a></li>
+          <li><a href="javascript:show('#info')">Info</a></li>
           <li><a href="javascript:show('#docs')">Docs</a></li>
         </ul>
 
@@ -161,6 +162,16 @@
             </ul>
           </div>
 
+          <div id="info" class="activity">
+            <ul>
+              <li> <?= html::anchor("welcome/mptt&type=text", "MPTT tree (text)") ?> </li>
+              <li>
+                <?= html::anchor("welcome/mptt", "MPTT tree (graph)") ?>
+                <i>(requires /usr/bin/dot from the graphviz package)</i>
+              </li>
+            </ul>
+          </div>
+
           <div id="docs" class="activity">
             <ul>
               <li>