From 5314d9b2cfaef3f2fd0ead262e18d1776fd99c8d Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@controlyourself.ca>
Date: Fri, 1 May 2009 12:01:28 -0700
Subject: make faves work with ids

---
 classes/Fave.php   | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++--
 classes/Notice.php |  4 ++--
 classes/User.php   | 38 +++++++++++++++++---------------------
 3 files changed, 70 insertions(+), 25 deletions(-)

diff --git a/classes/Fave.php b/classes/Fave.php
index 24df5938c..915b4572f 100644
--- a/classes/Fave.php
+++ b/classes/Fave.php
@@ -4,7 +4,7 @@
  */
 require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
 
-class Fave extends Memcached_DataObject 
+class Fave extends Memcached_DataObject
 {
     ###START_AUTOCODE
     /* the code below is auto generated do not remove the above tag */
@@ -31,9 +31,58 @@ class Fave extends Memcached_DataObject
         }
         return $fave;
     }
-    
+
     function &pkeyGet($kv)
     {
         return Memcached_DataObject::pkeyGet('Fave', $kv);
     }
+
+    function stream($user_id, $offset=0, $limit=NOTICES_PER_PAGE)
+    {
+        $ids = Notice::stream(array('Fave', '_streamDirect'),
+                              array($user_id),
+                              'fave:ids_by_user:'.$user_id,
+                              $offset, $limit);
+        return $ids;
+    }
+
+    function _streamDirect($user_id, $offset, $limit, $since_id, $before_id, $since)
+    {
+        $fav = new Fave();
+
+        $fav->user_id = $user_id;
+
+        $fav->selectAdd();
+        $fav->selectAdd('notice_id');
+
+        if ($since_id != 0) {
+            $fav->whereAdd('notice_id > ' . $since_id);
+        }
+
+        if ($before_id != 0) {
+            $fav->whereAdd('notice_id < ' . $before_id);
+        }
+
+        if (!is_null($since)) {
+            $fav->whereAdd('modified > \'' . date('Y-m-d H:i:s', $since) . '\'');
+        }
+
+        // NOTE: we sort by fave time, not by notice time!
+
+        $fav->orderBy('modified DESC');
+
+        if (!is_null($offset)) {
+            $fav->limit($offset, $limit);
+        }
+
+        $ids = array();
+
+        if ($fav->find()) {
+            while ($fav->fetch()) {
+                $ids[] = $fav->notice_id;
+            }
+        }
+
+        return $ids;
+    }
 }
diff --git a/classes/Notice.php b/classes/Notice.php
index c036e6e9e..771a4e715 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -412,9 +412,9 @@ class Notice extends Memcached_DataObject
             $fave->notice_id = $this->id;
             if ($fave->find()) {
                 while ($fave->fetch()) {
-                    $cache->delete(common_cache_key('user:faves:'.$fave->user_id));
+                    $cache->delete(common_cache_key('fave:ids_by_user:'.$fave->user_id));
                     if ($blowLast) {
-                        $cache->delete(common_cache_key('user:faves:'.$fave->user_id.';last'));
+                        $cache->delete(common_cache_key('fave:ids_by_user:'.$fave->user_id.';last'));
                     }
                 }
             }
diff --git a/classes/User.php b/classes/User.php
index b76e45c33..b5ac7b220 100644
--- a/classes/User.php
+++ b/classes/User.php
@@ -349,30 +349,31 @@ class User extends Memcached_DataObject
         $cache = common_memcache();
 
         // XXX: Kind of a hack.
+
         if ($cache) {
             // This is the stream of favorite notices, in rev chron
             // order. This forces it into cache.
-            $faves = $this->favoriteNotices(0, NOTICE_CACHE_WINDOW);
-            $cnt = 0;
-            while ($faves->fetch()) {
-                if ($faves->id < $notice->id) {
-                    // If we passed it, it's not a fave
-                    return false;
-                } else if ($faves->id == $notice->id) {
-                    // If it matches a cached notice, then it's a fave
-                    return true;
-                }
-                $cnt++;
+
+            $ids = Fave::stream($this->id, 0, NOTICE_CACHE_WINDOW);
+
+            // If it's in the list, then it's a fave
+
+            if (in_array($notice->id, $ids)) {
+                return true;
             }
+
             // If we're not past the end of the cache window,
             // then the cache has all available faves, so this one
             // is not a fave.
-            if ($cnt < NOTICE_CACHE_WINDOW) {
+
+            if (count($ids) < NOTICE_CACHE_WINDOW) {
                 return false;
             }
+
             // Otherwise, cache doesn't have all faves;
             // fall through to the default
         }
+
         $fave = Fave::pkeyGet(array('user_id' => $this->id,
                                     'notice_id' => $notice->id));
         return ((is_null($fave)) ? false : true);
@@ -418,13 +419,8 @@ class User extends Memcached_DataObject
 
     function favoriteNotices($offset=0, $limit=NOTICES_PER_PAGE)
     {
-        $qry =
-          'SELECT notice.* ' .
-          'FROM notice JOIN fave ON notice.id = fave.notice_id ' .
-          'WHERE fave.user_id = %d ';
-        return Notice::getStream(sprintf($qry, $this->id),
-                                 'user:faves:'.$this->id,
-                                 $offset, $limit);
+        $ids = Fave::stream($this->id, $offset, $limit);
+        return Notice::getStreamByIds($ids);
     }
 
     function noticesWithFriends($offset=0, $limit=NOTICES_PER_PAGE, $since_id=0, $before_id=0, $since=null)
@@ -459,8 +455,8 @@ class User extends Memcached_DataObject
         if ($cache) {
             // Faves don't happen chronologically, so we need to blow
             // ;last cache, too
-            $cache->delete(common_cache_key('user:faves:'.$this->id));
-            $cache->delete(common_cache_key('user:faves:'.$this->id).';last');
+            $cache->delete(common_cache_key('fave:ids_by_user:'.$this->id));
+            $cache->delete(common_cache_key('fave:ids_by_user:'.$this->id.';last'));
         }
     }
 
-- 
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