A base class for tag cloud sections

diff --git a/lib/tagcloudsection.php b/lib/tagcloudsection.php
new file mode 100644 (file)
index 0000000..121dfc4
--- /dev/null
+++ b/lib/tagcloudsection.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * Laconica, the distributed open-source microblogging tool
+ *
+ * Base class for sections showing tag clouds
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Widget
+ * @package   Laconica
+ * @author    Evan Prodromou <evan@controlyourself.ca>
+ * @copyright 2009 Control Yourself, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://laconi.ca/
+ */
+
+if (!defined('LACONICA')) {
+    exit(1);
+}
+
+define('TAGS_PER_SECTION', 20);
+
+/**
+ * Base class for sections
+ *
+ * These are the widgets that show interesting data about a person
+ * group, or site.
+ *
+ * @category Widget
+ * @package  Laconica
+ * @author   Evan Prodromou <evan@controlyourself.ca>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://laconi.ca/
+ */
+
+class TagCloudSection extends Section
+{
+    function showContent()
+    {
+        $tags = $this->getTags();
+
+        if (!$tags) {
+            return false;
+        }
+
+        $cnt = 0;
+
+        $tw = array();
+        $sum = 0;
+
+        while ($tags->fetch() && ++$cnt <= TAGS_PER_SECTION) {
+            $tw[$tags->tag] = $tags->weight;
+            $sum += $tags->weight;
+        }
+
+        ksort($tw);
+
+        $this->out->elementStart('ul', 'tags xoxo tag-cloud');
+        foreach ($tw as $tag => $weight) {
+            $this->showTag($tag, $weight, $weight/$sum);
+        }
+        $this->out->elementEnd('ul');
+
+        return ($cnt > TAGS_PER_SECTION);
+    }
+
+    function getTags()
+    {
+        return null;
+    }
+
+    function showTag($tag, $weight, $relative)
+    {
+        if ($relative > 0.1) {
+            $rel =  'tag-cloud-7';
+        } else if ($relative > 0.05) {
+            $rel = 'tag-cloud-6';
+        } else if ($relative > 0.02) {
+            $rel = 'tag-cloud-5';
+        } else if ($relative > 0.01) {
+            $rel = 'tag-cloud-4';
+        } else if ($relative > 0.005) {
+            $rel = 'tag-cloud-3';
+        } else if ($relative > 0.002) {
+            $rel = 'tag-cloud-2';
+        } else {
+            $rel = 'tag-cloud-1';
+        }
+
+        $this->out->elementStart('li', $rel);
+        $this->out->element('a', array('href' => $this->tagUrl($tag)),
+                       $tag);
+        $this->out->elementEnd('li');
+    }
+
+    function tagUrl($tag)
+    {
+        return common_local_url('tag', array('tag' => $tag));
+    }
+}