From 9b9db3b28aa117085385baa264ba6d8bb928cfac Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Tue, 16 Nov 2010 11:10:32 -0800
Subject: Prep for ticket #2895: consolidate common code from PopularNoticeList
 and FavoritedAction for fetching popular notice lists

---
 lib/popularity.php | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 lib/popularity.php

(limited to 'lib/popularity.php')

diff --git a/lib/popularity.php b/lib/popularity.php
new file mode 100644
index 000000000..c5b795b8d
--- /dev/null
+++ b/lib/popularity.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Wrapper for fetching lists of popular notices.
+ *
+ * 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   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @author    Brion Vibber <brion@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+    exit(1);
+}
+
+/**
+ * Wrapper for fetching notices ranked according to popularity,
+ * broken out so it can be called from multiple actions with
+ * less code duplication.
+ */
+class Popularity
+{
+    public $limit = NOTICES_PER_PAGE;
+    public $offset = 0;
+    public $tag = false;
+    public $expiry = 600;
+
+    /**
+     * Run a cached query to fetch notices, whee!
+     *
+     * @return Notice
+     */
+    function getNotices()
+    {
+        // @fixme there should be a common func for this
+        if (common_config('db', 'type') == 'pgsql') {
+            if (!empty($this->out->tag)) {
+                $tag = pg_escape_string($this->out->tag);
+            }
+        } else {
+            if (!empty($this->out->tag)) {
+                 $tag = mysql_escape_string($this->out->tag);
+            }
+        }
+        $weightexpr = common_sql_weight('fave.modified', common_config('popular', 'dropoff'));
+        $cutoff = sprintf("fave.modified > '%s'",
+                          common_sql_date(time() - common_config('popular', 'cutoff')));
+        $qry = "SELECT notice.*, $weightexpr as weight ";
+        if(isset($tag)) {
+            $qry .= 'FROM notice_tag, notice JOIN fave ON notice.id = fave.notice_id ' .
+                    "WHERE $cutoff and notice.id = notice_tag.notice_id and '$tag' = notice_tag.tag";
+        } else {
+            $qry .= 'FROM notice JOIN fave ON notice.id = fave.notice_id ' .
+                    "WHERE $cutoff";
+        }
+        $qry .= ' GROUP BY notice.id,notice.profile_id,notice.content,notice.uri,' .
+                'notice.rendered,notice.url,notice.created,notice.modified,' .
+                'notice.reply_to,notice.is_local,notice.source,notice.conversation, ' .
+                'notice.lat,notice.lon,location_id,location_ns,notice.repeat_of';
+        $qry .= ' ORDER BY weight DESC';
+
+        $offset = $this->offset;
+        $limit  = $this->limit + 1;
+
+        $qry .= ' LIMIT ' . $limit . ' OFFSET ' . $offset;
+
+        $notice = Memcached_DataObject::cachedQuery('Notice',
+                                                    $qry,
+                                                    1200);
+        return $notice;
+    }
+}
\ No newline at end of file
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