]> git.mxchange.org Git - quix0rs-gnu-social.git/blobdiff - classes/Notice.php
Hide stuff if there's an exception getting the profile
[quix0rs-gnu-social.git] / classes / Notice.php
index c45f915711736efd965c53f25a28e7a35926343f..2c404e2550544a307c40c037f30514a00167842b 100644 (file)
@@ -1,7 +1,7 @@
 <?php
 /**
  * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2008, 2009, StatusNet, Inc.
+ * Copyright (C) 2008-2011 StatusNet, Inc.
  *
  * 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
@@ -45,11 +45,11 @@ require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
 /* We keep 200 notices, the max number of notices available per API request,
  * in the memcached cache. */
 
-define('NOTICE_CACHE_WINDOW', 200);
+define('NOTICE_CACHE_WINDOW', CachingNoticeStream::CACHE_WINDOW);
 
 define('MAX_BOXCARS', 128);
 
-class Notice extends Memcached_DataObject
+class Notice extends Managed_DataObject
 {
     ###START_AUTOCODE
     /* the code below is auto generated do not remove the above tag */
@@ -72,6 +72,9 @@ class Notice extends Memcached_DataObject
     public $location_id;                     // int(4)
     public $location_ns;                     // int(4)
     public $repeat_of;                       // int(4)
+    public $verb;                            // varchar(255)
+    public $object_type;                     // varchar(255)
+    public $scope;                           // int(4)
 
     /* Static get */
     function staticGet($k,$v=NULL)
@@ -82,23 +85,95 @@ class Notice extends Memcached_DataObject
     /* the code above is auto generated do not remove the tag below */
     ###END_AUTOCODE
 
+    public static function schemaDef()
+    {
+        $def = array(
+            'fields' => array(
+                'id' => array('type' => 'serial', 'not null' => true, 'description' => 'unique identifier'),
+                'profile_id' => array('type' => 'int', 'not null' => true, 'description' => 'who made the update'),
+                'uri' => array('type' => 'varchar', 'length' => 255, 'description' => 'universally unique identifier, usually a tag URI'),
+                'content' => array('type' => 'text', 'description' => 'update content', 'collate' => 'utf8_general_ci'),
+                'rendered' => array('type' => 'text', 'description' => 'HTML version of the content'),
+                'url' => array('type' => 'varchar', 'length' => 255, 'description' => 'URL of any attachment (image, video, bookmark, whatever)'),
+                'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
+                'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
+                'reply_to' => array('type' => 'int', 'description' => 'notice replied to (usually a guess)'),
+                'is_local' => array('type' => 'int', 'size' => 'tiny', 'default' => 0, 'description' => 'notice was generated by a user'),
+                'source' => array('type' => 'varchar', 'length' => 32, 'description' => 'source of comment, like "web", "im", or "clientname"'),
+                'conversation' => array('type' => 'int', 'description' => 'id of root notice in this conversation'),
+                'lat' => array('type' => 'numeric', 'precision' => 10, 'scale' => 7, 'description' => 'latitude'),
+                'lon' => array('type' => 'numeric', 'precision' => 10, 'scale' => 7, 'description' => 'longitude'),
+                'location_id' => array('type' => 'int', 'description' => 'location id if possible'),
+                'location_ns' => array('type' => 'int', 'description' => 'namespace for location'),
+                'repeat_of' => array('type' => 'int', 'description' => 'notice this is a repeat of'),
+                'object_type' => array('type' => 'varchar', 'length' => 255, 'description' => 'URI representing activity streams object type', 'default' => 'http://activitystrea.ms/schema/1.0/note'),
+                'verb' => array('type' => 'varchar', 'length' => 255, 'description' => 'URI representing activity streams verb', 'default' => 'http://activitystrea.ms/schema/1.0/post'),
+                'scope' => array('type' => 'int',
+                                 'description' => 'bit map for distribution scope; 0 = everywhere; 1 = this server only; 2 = addressees; 4 = followers; null = default'),
+            ),
+            'primary key' => array('id'),
+            'unique keys' => array(
+                'notice_uri_key' => array('uri'),
+            ),
+            'foreign keys' => array(
+                'notice_profile_id_fkey' => array('profile', array('profile_id' => 'id')),
+                'notice_reply_to_fkey' => array('notice', array('reply_to' => 'id')),
+                'notice_conversation_fkey' => array('conversation', array('conversation' => 'id')), # note... used to refer to notice.id
+                'notice_repeat_of_fkey' => array('notice', array('repeat_of' => 'id')), # @fixme: what about repeats of deleted notices?
+            ),
+            'indexes' => array(
+                'notice_created_id_is_local_idx' => array('created', 'id', 'is_local'),
+                'notice_profile_id_idx' => array('profile_id', 'created', 'id'),
+                'notice_repeat_of_created_id_idx' => array('repeat_of', 'created', 'id'),
+                'notice_conversation_created_id_idx' => array('conversation', 'created', 'id'),
+                'notice_replyto_idx' => array('reply_to')
+            )
+        );
+
+        if (common_config('search', 'type') == 'fulltext') {
+            $def['fulltext indexes'] = array('content' => array('content'));
+        }
+
+        return $def;
+    }
+    
+       function multiGet($kc, $kvs, $skipNulls=true)
+       {
+               return Memcached_DataObject::multiGet('Notice', $kc, $kvs, $skipNulls);
+       }
+       
     /* Notice types */
     const LOCAL_PUBLIC    =  1;
-    const REMOTE_OMB      =  0;
+    const REMOTE          =  0;
     const LOCAL_NONPUBLIC = -1;
     const GATEWAY         = -2;
 
+    const PUBLIC_SCOPE    = 0; // Useful fake constant
+    const SITE_SCOPE      = 1;
+    const ADDRESSEE_SCOPE = 2;
+    const GROUP_SCOPE     = 4;
+    const FOLLOWER_SCOPE  = 8;
+
+    protected $_profile = -1;
+
     function getProfile()
     {
-        $profile = Profile::staticGet('id', $this->profile_id);
+        if (is_int($this->_profile) && $this->_profile == -1) {
+            $this->_setProfile(Profile::staticGet('id', $this->profile_id));
 
-        if (empty($profile)) {
-            // TRANS: Server exception thrown when a user profile for a notice cannot be found.
-            // TRANS: %1$d is a profile ID (number), %2$d is a notice ID (number).
-            throw new ServerException(sprintf(_('No such profile (%1$d) for notice (%2$d).'), $this->profile_id, $this->id));
+            if (empty($this->_profile)) {
+                // TRANS: Server exception thrown when a user profile for a notice cannot be found.
+                // TRANS: %1$d is a profile ID (number), %2$d is a notice ID (number).
+                throw new ServerException(sprintf(_('No such profile (%1$d) for notice (%2$d).'), $this->profile_id, $this->id));
+            }
         }
 
-        return $profile;
+        return $this->_profile;
+    }
+    
+    function _setProfile($profile)
+    {
+        $this->_profile = $profile;
     }
 
     function delete()
@@ -196,7 +271,7 @@ class Notice extends Memcached_DataObject
 
         if (!$id) {
             // TRANS: Server exception. %s are the error details.
-            throw new ServerException(sprintf(_('Database error inserting hashtag: %s'),
+            throw new ServerException(sprintf(_('Database error inserting hashtag: %s.'),
                                               $last_error->message));
             return;
         }
@@ -217,11 +292,11 @@ class Notice extends Memcached_DataObject
      *              string 'created' timestamp of notice; defaults to now
      *              int 'is_local' source/gateway ID, one of:
      *                  Notice::LOCAL_PUBLIC    - Local, ok to appear in public timeline
-     *                  Notice::REMOTE_OMB      - Sent from a remote OMB service;
+     *                  Notice::REMOTE          - Sent from a remote service;
      *                                            hide from public timeline but show in
      *                                            local "and friends" timelines
      *                  Notice::LOCAL_NONPUBLIC - Local, but hide from public timeline
-     *                  Notice::GATEWAY         - From another non-OMB service;
+     *                  Notice::GATEWAY         - From another non-OStatus service;
      *                                            will not appear in public views
      *              float 'lat' decimal latitude for geolocation
      *              float 'lon' decimal longitude for geolocation
@@ -241,6 +316,9 @@ class Notice extends Memcached_DataObject
      *              array 'urls' list of attached/referred URLs to save with the
      *                           notice in place of extracting links from content
      *              boolean 'distribute' whether to distribute the notice, default true
+     *              string 'object_type' URL of the associated object type (default ActivityObject::NOTE)
+     *              string 'verb' URL of the associated verb (default ActivityVerb::POST)
+     *              int 'scope' Scope bitmask; default to SITE_SCOPE on private sites, 0 otherwise
      *
      * @fixme tag override
      *
@@ -252,10 +330,13 @@ class Notice extends Memcached_DataObject
                           'url' => null,
                           'reply_to' => null,
                           'repeat_of' => null,
-                          'distribute' => true);
+                          'scope' => null,
+                          'distribute' => true,
+                          'object_type' => null,
+                          'verb' => null);
 
-        if (!empty($options)) {
-            $options = $options + $defaults;
+        if (!empty($options) && is_array($options)) {
+            $options = array_merge($defaults, $options);
             extract($options);
         } else {
             extract($defaults);
@@ -310,7 +391,7 @@ class Notice extends Memcached_DataObject
 
         $autosource = common_config('public', 'autosource');
 
-        # Sandboxed are non-false, but not 1, either
+        // Sandboxed are non-false, but not 1, either
 
         if (!$profile->hasRight(Right::PUBLICNOTICE) ||
             ($source && $autosource && in_array($source, $autosource))) {
@@ -331,17 +412,80 @@ class Notice extends Memcached_DataObject
         $notice->uri = $uri;
         $notice->url = $url;
 
+        // Get the groups here so we can figure out replies and such
+
+        if (!isset($groups)) {
+            $groups = self::groupsFromText($notice->content, $profile);
+        }
+
+        $reply = null;
+
         // Handle repeat case
 
         if (isset($repeat_of)) {
+
+            // Check for a private one
+
+            $repeat = Notice::staticGet('id', $repeat_of);
+
+            if (empty($repeat)) {
+                // TRANS: Client exception thrown in notice when trying to repeat a missing or deleted notice.
+                throw new ClientException(_('Cannot repeat; original notice is missing or deleted.'));
+            }
+
+            if ($profile->id == $repeat->profile_id) {
+                // TRANS: Client error displayed when trying to repeat an own notice.
+                throw new ClientException(_('You cannot repeat your own notice.'));
+            }
+
+            if ($repeat->scope != Notice::SITE_SCOPE &&
+                $repeat->scope != Notice::PUBLIC_SCOPE) {
+                // TRANS: Client error displayed when trying to repeat a non-public notice.
+                throw new ClientException(_('Cannot repeat a private notice.'), 403);
+            }
+
+            if (!$repeat->inScope($profile)) {
+                // The generic checks above should cover this, but let's be sure!
+                // TRANS: Client error displayed when trying to repeat a notice you cannot access.
+                throw new ClientException(_('Cannot repeat a notice you cannot read.'), 403);
+            }
+
+            if ($profile->hasRepeated($repeat->id)) {
+                // TRANS: Client error displayed when trying to repeat an already repeated notice.
+                throw new ClientException(_('You already repeated that notice.'));
+            }
+
             $notice->repeat_of = $repeat_of;
         } else {
-            $notice->reply_to = self::getReplyTo($reply_to, $profile_id, $source, $final);
-        }
+            $reply = self::getReplyTo($reply_to, $profile_id, $source, $final);
+
+            if (!empty($reply)) {
+
+                if (!$reply->inScope($profile)) {
+                    // TRANS: Client error displayed when trying to reply to a notice a the target has no access to.
+                    // TRANS: %1$s is a user nickname, %2$d is a notice ID (number).
+                    throw new ClientException(sprintf(_('%1$s has no access to notice %2$d.'),
+                                                      $profile->nickname, $reply->id), 403);
+                }
+
+                $notice->reply_to     = $reply->id;
+                $notice->conversation = $reply->conversation;
+
+                // If the original is private to a group, and notice has no group specified,
+                // make it to the same group(s)
+
+                if (empty($groups) && ($reply->scope | Notice::GROUP_SCOPE)) {
+                    $groups = array();
+                    $replyGroups = $reply->getGroups();
+                    foreach ($replyGroups as $group) {
+                        if ($profile->isMember($group)) {
+                            $groups[] = $group->id;
+                        }
+                    }
+                }
 
-        if (!empty($notice->reply_to)) {
-            $reply = Notice::staticGet('id', $notice->reply_to);
-            $notice->conversation = $reply->conversation;
+                // Scope set below
+            }
         }
 
         if (!empty($lat) && !empty($lon)) {
@@ -360,6 +504,57 @@ class Notice extends Memcached_DataObject
             $notice->rendered = common_render_content($final, $notice);
         }
 
+        if (empty($verb)) {
+            if (!empty($notice->repeat_of)) {
+                $notice->verb        = ActivityVerb::SHARE;
+                $notice->object_type = ActivityObject::ACTIVITY;
+            } else {
+                $notice->verb        = ActivityVerb::POST;
+            }
+        } else {
+            $notice->verb = $verb;
+        }
+
+        if (empty($object_type)) {
+            $notice->object_type = (empty($notice->reply_to)) ? ActivityObject::NOTE : ActivityObject::COMMENT;
+        } else {
+            $notice->object_type = $object_type;
+        }
+
+        if (is_null($scope)) { // 0 is a valid value
+            if (!empty($reply)) {
+                $notice->scope = $reply->scope;
+            } else {
+                $notice->scope = self::defaultScope();
+            }
+        } else {
+            $notice->scope = $scope;
+        }
+
+        // For private streams
+
+        $user = $profile->getUser();
+
+        if (!empty($user)) {
+            if ($user->private_stream &&
+                ($notice->scope == Notice::PUBLIC_SCOPE ||
+                 $notice->scope == Notice::SITE_SCOPE)) {
+                $notice->scope |= Notice::FOLLOWER_SCOPE;
+            }
+        }
+
+        // Force the scope for private groups
+
+        foreach ($groups as $groupId) {
+            $group = User_group::staticGet('id', $groupId);
+            if (!empty($group)) {
+                if ($group->force_scope) {
+                    $notice->scope |= Notice::GROUP_SCOPE;
+                    break;
+                }
+            }
+        }
+
         if (Event::handle('StartNoticeSave', array(&$notice))) {
 
             // XXX: some of these functions write to the DB
@@ -402,8 +597,8 @@ class Notice extends Memcached_DataObject
 
         }
 
-        # Clear the cache for subscribed users, so they'll update at next request
-        # XXX: someone clever could prepend instead of clearing the cache
+        // Clear the cache for subscribed users, so they'll update at next request
+        // XXX: someone clever could prepend instead of clearing the cache
 
         $notice->blowOnInsert();
 
@@ -423,11 +618,9 @@ class Notice extends Memcached_DataObject
 
         // Note: groups may save tags, so must be run after tags are saved
         // to avoid errors on duplicates.
-        if (isset($groups)) {
-            $notice->saveKnownGroups($groups);
-        } else {
-            $notice->saveGroups();
-        }
+        // Note: groups should always be set.
+
+        $notice->saveKnownGroups($groups);
 
         if (isset($urls)) {
             $notice->saveKnownUrls($urls);
@@ -451,13 +644,13 @@ class Notice extends Memcached_DataObject
             $this->blowStream('public');
         }
 
-        // XXX: Before we were blowing the casche only if the notice id
-        // was not the root of the conversation.  What to do now?
-
-        $this->blowStream('notice:conversation_ids:%d', $this->conversation);
+        self::blow('notice:list-ids:conversation:%s', $this->conversation);
+        self::blow('conversation:notice_count:%d', $this->conversation);
 
         if (!empty($this->repeat_of)) {
+            // XXX: we should probably only use one of these
             $this->blowStream('notice:repeats:%d', $this->repeat_of);
+            self::blow('notice:list-ids:repeat_of:%d', $this->repeat_of);
         }
 
         $original = Notice::staticGet('id', $this->repeat_of);
@@ -474,6 +667,11 @@ class Notice extends Memcached_DataObject
         if (!empty($profile)) {
             $profile->blowNoticeCount();
         }
+
+        $ptags = $this->getProfileTags();
+        foreach ($ptags as $ptag) {
+            $ptag->blowNoticeStreamCache();
+        }
     }
 
     /**
@@ -489,6 +687,18 @@ class Notice extends Memcached_DataObject
         if ($this->isPublic()) {
             self::blow('public;last');
         }
+
+        self::blow('fave:by_notice', $this->id);
+
+        if ($this->conversation) {
+            // In case we're the first, will need to calc a new root.
+            self::blow('notice:conversation_root:%d', $this->conversation);
+        }
+
+        $ptags = $this->getProfileTags();
+        foreach ($ptags as $ptag) {
+            $ptag->blowNoticeStreamCache(true);
+        }
     }
 
     function blowStream()
@@ -570,7 +780,7 @@ class Notice extends Memcached_DataObject
         if (empty($profile)) {
             return false;
         }
-        $notice = $profile->getNotices(0, NOTICE_CACHE_WINDOW);
+        $notice = $profile->getNotices(0, CachingNoticeStream::CACHE_WINDOW);
         if (!empty($notice)) {
             $last = 0;
             while ($notice->fetch()) {
@@ -581,8 +791,8 @@ class Notice extends Memcached_DataObject
                 }
             }
         }
-        # If we get here, oldest item in cache window is not
-        # old enough for dupe limit; do direct check against DB
+        // If we get here, oldest item in cache window is not
+        // old enough for dupe limit; do direct check against DB
         $notice = new Notice();
         $notice->profile_id = $profile_id;
         $notice->content = $content;
@@ -598,187 +808,59 @@ class Notice extends Memcached_DataObject
         if (empty($profile)) {
             return false;
         }
-        # Get the Nth notice
+        // Get the Nth notice
         $notice = $profile->getNotices(common_config('throttle', 'count') - 1, 1);
         if ($notice && $notice->fetch()) {
-            # If the Nth notice was posted less than timespan seconds ago
+            // If the Nth notice was posted less than timespan seconds ago
             if (time() - strtotime($notice->created) <= common_config('throttle', 'timespan')) {
-                # Then we throttle
+                // Then we throttle
                 return false;
             }
         }
-        # Either not N notices in the stream, OR the Nth was not posted within timespan seconds
+        // Either not N notices in the stream, OR the Nth was not posted within timespan seconds
         return true;
     }
 
-    function getUploadedAttachment() {
-        $post = clone $this;
-        $query = 'select file.url as up, file.id as i from file join file_to_post on file.id = file_id where post_id=' . $post->escape($post->id) . ' and url like "%/notice/%/file"';
-        $post->query($query);
-        $post->fetch();
-        if (empty($post->up) || empty($post->i)) {
-            $ret = false;
-        } else {
-            $ret = array($post->up, $post->i);
-        }
-        $post->free();
-        return $ret;
-    }
-
-    function hasAttachments() {
-        $post = clone $this;
-        $query = "select count(file_id) as n_attachments from file join file_to_post on (file_id = file.id) join notice on (post_id = notice.id) where post_id = " . $post->escape($post->id);
-        $post->query($query);
-        $post->fetch();
-        $n_attachments = intval($post->n_attachments);
-        $post->free();
-        return $n_attachments;
-    }
-
+       protected $_attachments = -1;
+       
     function attachments() {
-        // XXX: cache this
-        $att = array();
-        $f2p = new File_to_post;
-        $f2p->post_id = $this->id;
-        if ($f2p->find()) {
-            while ($f2p->fetch()) {
-                $f = File::staticGet($f2p->file_id);
-                if ($f) {
-                    $att[] = clone($f);
-                }
-            }
-        }
-        return $att;
-    }
-
-    function getStreamByIds($ids)
-    {
-        $cache = common_memcache();
-
-        if (!empty($cache)) {
-            $notices = array();
-            foreach ($ids as $id) {
-                $n = Notice::staticGet('id', $id);
-                if (!empty($n)) {
-                    $notices[] = $n;
-                }
-            }
-            return new ArrayWrapper($notices);
-        } else {
-            $notice = new Notice();
-            if (empty($ids)) {
-                //if no IDs requested, just return the notice object
-                return $notice;
-            }
-            $notice->whereAdd('id in (' . implode(', ', $ids) . ')');
-
-            $notice->find();
-
-            $temp = array();
-
-            while ($notice->fetch()) {
-                $temp[$notice->id] = clone($notice);
-            }
-
-            $wrapped = array();
-
-            foreach ($ids as $id) {
-                if (array_key_exists($id, $temp)) {
-                    $wrapped[] = $temp[$id];
-                }
-            }
 
-            return new ArrayWrapper($wrapped);
+               if ($this->_attachments != -1)  {
+            return $this->_attachments;
         }
+               
+               $f2ps = Memcached_DataObject::listGet('File_to_post', 'post_id', array($this->id));
+               
+               $ids = array();
+               
+               foreach ($f2ps[$this->id] as $f2p) {
+            $ids[] = $f2p->file_id;    
+        }
+               
+               $files = Memcached_DataObject::multiGet('File', 'id', $ids);
+
+               $this->_attachments = $files->fetchAll();
+               
+        return $this->_attachments;
     }
 
+       function _setAttachments($attachments)
+       {
+           $this->_attachments = $attachments;
+       }
+
     function publicStream($offset=0, $limit=20, $since_id=0, $max_id=0)
     {
-        $ids = Notice::stream(array('Notice', '_publicStreamDirect'),
-                              array(),
-                              'public',
-                              $offset, $limit, $since_id, $max_id);
-        return Notice::getStreamByIds($ids);
+        $stream = new PublicNoticeStream();
+        return $stream->getNotices($offset, $limit, $since_id, $max_id);
     }
 
-    function _publicStreamDirect($offset=0, $limit=20, $since_id=0, $max_id=0)
-    {
-        $notice = new Notice();
-
-        $notice->selectAdd(); // clears it
-        $notice->selectAdd('id');
-
-        $notice->orderBy('created DESC, id DESC');
-
-        if (!is_null($offset)) {
-            $notice->limit($offset, $limit);
-        }
-
-        if (common_config('public', 'localonly')) {
-            $notice->whereAdd('is_local = ' . Notice::LOCAL_PUBLIC);
-        } else {
-            # -1 == blacklisted, -2 == gateway (i.e. Twitter)
-            $notice->whereAdd('is_local !='. Notice::LOCAL_NONPUBLIC);
-            $notice->whereAdd('is_local !='. Notice::GATEWAY);
-        }
-
-        Notice::addWhereSinceId($notice, $since_id);
-        Notice::addWhereMaxId($notice, $max_id);
-
-        $ids = array();
-
-        if ($notice->find()) {
-            while ($notice->fetch()) {
-                $ids[] = $notice->id;
-            }
-        }
-
-        $notice->free();
-        $notice = NULL;
-
-        return $ids;
-    }
 
     function conversationStream($id, $offset=0, $limit=20, $since_id=0, $max_id=0)
     {
-        $ids = Notice::stream(array('Notice', '_conversationStreamDirect'),
-                              array($id),
-                              'notice:conversation_ids:'.$id,
-                              $offset, $limit, $since_id, $max_id);
-
-        return Notice::getStreamByIds($ids);
-    }
-
-    function _conversationStreamDirect($id, $offset=0, $limit=20, $since_id=0, $max_id=0)
-    {
-        $notice = new Notice();
-
-        $notice->selectAdd(); // clears it
-        $notice->selectAdd('id');
-
-        $notice->conversation = $id;
-
-        $notice->orderBy('created DESC, id DESC');
-
-        if (!is_null($offset)) {
-            $notice->limit($offset, $limit);
-        }
-
-        Notice::addWhereSinceId($notice, $since_id);
-        Notice::addWhereMaxId($notice, $max_id);
-
-        $ids = array();
-
-        if ($notice->find()) {
-            while ($notice->fetch()) {
-                $ids[] = $notice->id;
-            }
-        }
-
-        $notice->free();
-        $notice = NULL;
+        $stream = new ConversationNoticeStream($id);
 
-        return $ids;
+        return $stream->getNotices($offset, $limit, $since_id, $max_id);
     }
 
     /**
@@ -803,6 +885,70 @@ class Notice extends Memcached_DataObject
         return false;
     }
 
+    /**
+     * Grab the earliest notice from this conversation.
+     *
+     * @return Notice or null
+     */
+    function conversationRoot($profile=-1)
+    {
+        // XXX: can this happen?
+
+        if (empty($this->conversation)) {
+            return null;
+        }
+
+        // Get the current profile if not specified
+
+        if (is_int($profile) && $profile == -1) {
+            $profile = Profile::current();
+        }
+
+        // If this notice is out of scope, no root for you!
+
+        if (!$this->inScope($profile)) {
+            return null;
+        }
+
+        // If this isn't a reply to anything, then it's its own
+        // root.
+
+        if (empty($this->reply_to)) {
+            return $this;
+        }
+        
+        if (is_null($profile)) {
+            $keypart = sprintf('notice:conversation_root:%d:null', $this->id);
+        } else {
+            $keypart = sprintf('notice:conversation_root:%d:%d',
+                               $this->id,
+                               $profile->id);
+        }
+            
+        $root = self::cacheGet($keypart);
+
+        if ($root !== false && $root->inScope($profile)) {
+            return $root;
+        } else {
+            $last = $this;
+
+            do {
+                $parent = $last->getOriginal();
+                if (!empty($parent) && $parent->inScope($profile)) {
+                    $last = $parent;
+                    continue;
+                } else {
+                    $root = $last;
+                    break;
+                }
+            } while (!empty($parent));
+
+            self::cacheSet($keypart, $root);
+        }
+
+        return $root;
+    }
+
     /**
      * Pull up a full list of local recipients who will be getting
      * this notice in their inbox. Results will be cached, so don't
@@ -819,7 +965,7 @@ class Notice extends Memcached_DataObject
         $c = self::memcache();
 
         if (!empty($c)) {
-            $ni = $c->get(common_cache_key('notice:who_gets:'.$this->id));
+            $ni = $c->get(Cache::key('notice:who_gets:'.$this->id));
             if ($ni !== false) {
                 return $ni;
             }
@@ -834,6 +980,7 @@ class Notice extends Memcached_DataObject
         }
 
         $users = $this->getSubscribedUsers();
+        $ptags = $this->getProfileTags();
 
         // FIXME: kind of ignoring 'transitional'...
         // we'll probably stop supporting inboxless mode
@@ -841,46 +988,63 @@ class Notice extends Memcached_DataObject
 
         $ni = array();
 
-        foreach ($users as $id) {
-            $ni[$id] = NOTICE_INBOX_SOURCE_SUB;
-        }
+        // Give plugins a chance to add folks in at start...
+        if (Event::handle('StartNoticeWhoGets', array($this, &$ni))) {
 
-        foreach ($groups as $group) {
-            $users = $group->getUserMembers();
             foreach ($users as $id) {
-                if (!array_key_exists($id, $ni)) {
-                    $ni[$id] = NOTICE_INBOX_SOURCE_GROUP;
+                $ni[$id] = NOTICE_INBOX_SOURCE_SUB;
+            }
+
+            foreach ($groups as $group) {
+                $users = $group->getUserMembers();
+                foreach ($users as $id) {
+                    if (!array_key_exists($id, $ni)) {
+                        $ni[$id] = NOTICE_INBOX_SOURCE_GROUP;
+                    }
                 }
             }
-        }
 
-        foreach ($recipients as $recipient) {
-            if (!array_key_exists($recipient, $ni)) {
-                $ni[$recipient] = NOTICE_INBOX_SOURCE_REPLY;
+            foreach ($ptags as $ptag) {
+                $users = $ptag->getUserSubscribers();
+                foreach ($users as $id) {
+                    if (!array_key_exists($id, $ni)) {
+                        $ni[$id] = NOTICE_INBOX_SOURCE_PROFILE_TAG;
+                    }
+                }
             }
-        }
 
-        // Exclude any deleted, non-local, or blocking recipients.
-        $profile = $this->getProfile();
-        $originalProfile = null;
-        if ($this->repeat_of) {
-            // Check blocks against the original notice's poster as well.
-            $original = Notice::staticGet('id', $this->repeat_of);
-            if ($original) {
-                $originalProfile = $original->getProfile();
+            foreach ($recipients as $recipient) {
+                if (!array_key_exists($recipient, $ni)) {
+                    $ni[$recipient] = NOTICE_INBOX_SOURCE_REPLY;
+                }
             }
-        }
-        foreach ($ni as $id => $source) {
-            $user = User::staticGet('id', $id);
-            if (empty($user) || $user->hasBlocked($profile) ||
-                ($originalProfile && $user->hasBlocked($originalProfile))) {
-                unset($ni[$id]);
+
+            // Exclude any deleted, non-local, or blocking recipients.
+            $profile = $this->getProfile();
+            $originalProfile = null;
+            if ($this->repeat_of) {
+                // Check blocks against the original notice's poster as well.
+                $original = Notice::staticGet('id', $this->repeat_of);
+                if ($original) {
+                    $originalProfile = $original->getProfile();
+                }
+            }
+
+            foreach ($ni as $id => $source) {
+                $user = User::staticGet('id', $id);
+                if (empty($user) || $user->hasBlocked($profile) ||
+                    ($originalProfile && $user->hasBlocked($originalProfile))) {
+                    unset($ni[$id]);
+                }
             }
+
+            // Give plugins a chance to filter out...
+            Event::handle('EndNoticeWhoGets', array($this, &$ni));
         }
 
         if (!empty($c)) {
             // XXX: pack this data better
-            $c->set(common_cache_key('notice:who_gets:'.$this->id), $ni);
+            $c->set(Cache::key('notice:who_gets:'.$this->id), $ni);
         }
 
         return $ni;
@@ -950,6 +1114,19 @@ class Notice extends Memcached_DataObject
         return $ids;
     }
 
+    function getProfileTags()
+    {
+        $profile = $this->getProfile();
+        $list    = $profile->getOtherTags($profile);
+        $ptags   = array();
+
+        while($list->fetch()) {
+            $ptags[] = clone($list);
+        }
+
+        return $ptags;
+    }
+
     /**
      * Record this notice to the given group inboxes for delivery.
      * Overrides the regular parsing of !group markup.
@@ -976,7 +1153,17 @@ class Notice extends Memcached_DataObject
                     common_log_db_error($gi, 'INSERT', __FILE__);
                 }
 
-                // @fixme should we save the tags here or not?
+                if (common_config('group', 'addtag')) {
+                    // we automatically add a tag for every group name, too
+
+                    $tag = Notice_tag::pkeyGet(array('tag' => common_canonical_tag($group->nickname),
+                                                     'notice_id' => $this->id));
+
+                    if (is_null($tag)) {
+                        $this->saveTag($group->nickname);
+                    }
+                }
+
                 $groups[] = clone($group);
             } else {
                 common_log(LOG_ERR, "Local delivery to group id $id skipped, doesn't exist");
@@ -998,36 +1185,19 @@ class Notice extends Memcached_DataObject
             return array();
         }
 
-        $groups = array();
-
-        /* extract all !group */
-        $count = preg_match_all('/(?:^|\s)!(' . Nickname::DISPLAY_FMT . ')/',
-                                strtolower($this->content),
-                                $match);
-        if (!$count) {
-            return $groups;
-        }
-
         $profile = $this->getProfile();
 
+        $groups = self::groupsFromText($this->content, $profile);
+
         /* Add them to the database */
 
-        foreach (array_unique($match[1]) as $nickname) {
+        foreach ($groups as $group) {
             /* XXX: remote groups. */
-            $group = User_group::getForNickname($nickname, $profile);
 
             if (empty($group)) {
                 continue;
             }
 
-            // we automatically add a tag for every group name, too
-
-            $tag = Notice_tag::pkeyGet(array('tag' => common_canonical_tag($nickname),
-                                             'notice_id' => $this->id));
-
-            if (is_null($tag)) {
-                $this->saveTag($nickname);
-            }
 
             if ($profile->isMember($group)) {
 
@@ -1105,15 +1275,8 @@ class Notice extends Memcached_DataObject
                 continue;
             }
 
-            $reply = new Reply();
-
-            $reply->notice_id  = $this->id;
-            $reply->profile_id = $profile->id;
-            $reply->modified   = $this->created;
-
-            common_log(LOG_INFO, __METHOD__ . ": saving reply: notice $this->id to profile $profile->id");
-
-            $id = $reply->insert();
+            $this->saveReply($profile->id);
+            self::blow('reply:stream:%d', $profile->id);
         }
 
         return;
@@ -1139,13 +1302,27 @@ class Notice extends Memcached_DataObject
 
         $sender = Profile::staticGet($this->profile_id);
 
+        $replied = array();
+
+        // If it's a reply, save for the replied-to author
+
+        if (!empty($this->reply_to)) {
+            $original = $this->getOriginal();
+            if (!empty($original)) { // that'd be weird
+                $author = $original->getProfile();
+                if (!empty($author)) {
+                    $this->saveReply($author->id);
+                    $replied[$author->id] = 1;
+                    self::blow('reply:stream:%d', $author->id);
+                }
+            }
+        }
+
         // @todo ideally this parser information would only
         // be calculated once.
 
         $mentions = common_find_mentions($this->content, $this);
 
-        $replied = array();
-
         // store replied only for first @ (what user/notice what the reply directed,
         // we assume first @ is it)
 
@@ -1166,23 +1343,9 @@ class Notice extends Memcached_DataObject
                     continue;
                 }
 
-                $reply = new Reply();
-
-                $reply->notice_id  = $this->id;
-                $reply->profile_id = $mentioned->id;
-                $reply->modified   = $this->created;
-
-                $id = $reply->insert();
-
-                if (!$id) {
-                    common_log_db_error($reply, 'INSERT', __FILE__);
-                    // TRANS: Server exception thrown when a reply cannot be saved.
-                    // TRANS: %1$d is a notice ID, %2$d is the ID of the mentioned user.
-                    throw new ServerException(sprintf(_('Could not save reply for %1$d, %2$d.'), $this->id, $mentioned->id));
-                } else {
-                    $replied[$mentioned->id] = 1;
-                    self::blow('reply:stream:%d', $mentioned->id);
-                }
+                $this->saveReply($mentioned->id);
+                $replied[$mentioned->id] = 1;
+                self::blow('reply:stream:%d', $mentioned->id);
             }
         }
 
@@ -1191,6 +1354,21 @@ class Notice extends Memcached_DataObject
         return $recipientIds;
     }
 
+    function saveReply($profileId)
+    {
+        $reply = new Reply();
+
+        $reply->notice_id  = $this->id;
+        $reply->profile_id = $profileId;
+        $reply->modified   = $this->created;
+
+        $reply->insert();
+
+        return $reply;
+    }
+
+    protected $_replies = -1;
+
     /**
      * Pull the complete list of @-reply targets for this notice.
      *
@@ -1198,26 +1376,42 @@ class Notice extends Memcached_DataObject
      */
     function getReplies()
     {
-        // XXX: cache me
+        if ($this->_replies != -1) {
+            return $this->_replies;
+        }
+
+        $replyMap = Memcached_DataObject::listGet('Reply', 'notice_id', array($this->id));
 
         $ids = array();
 
-        $reply = new Reply();
-        $reply->selectAdd();
-        $reply->selectAdd('profile_id');
-        $reply->notice_id = $this->id;
+        foreach ($replyMap[$this->id] as $reply) {
+            $ids[] = $reply->profile_id;
+        }
 
-        if ($reply->find()) {
-            while($reply->fetch()) {
-                $ids[] = $reply->profile_id;
-            }
-        }
-
-        $reply->free();
+        $this->_replies = $ids;
 
         return $ids;
     }
 
+    function _setReplies($replies)
+    {
+        $this->_replies = $replies;
+    }
+
+    /**
+     * Pull the complete list of @-reply targets for this notice.
+     *
+     * @return array of Profiles
+     */
+    function getReplyProfiles()
+    {
+        $ids = $this->getReplies();
+        
+        $profiles = Profile::multiGet('id', $ids);
+        
+        return $profiles->fetchAll();
+    }
+
     /**
      * Send e-mail notifications to local @-reply targets.
      *
@@ -1248,6 +1442,9 @@ class Notice extends Memcached_DataObject
      *
      * @return array of Group objects
      */
+    
+    protected $_groups = -1;
+    
     function getGroups()
     {
         // Don't save groups for repeats
@@ -1255,30 +1452,31 @@ class Notice extends Memcached_DataObject
         if (!empty($this->repeat_of)) {
             return array();
         }
-
-        // XXX: cache me
-
-        $groups = array();
-
-        $gi = new Group_inbox();
-
-        $gi->selectAdd();
-        $gi->selectAdd('group_id');
-
-        $gi->notice_id = $this->id;
-
-        if ($gi->find()) {
-            while ($gi->fetch()) {
-                $group = User_group::staticGet('id', $gi->group_id);
-                if ($group) {
-                    $groups[] = $group;
-                }
-            }
+        
+        if ($this->_groups != -1)
+        {
+            return $this->_groups;
         }
+        
+        $gis = Memcached_DataObject::listGet('Group_inbox', 'notice_id', array($this->id));
 
-        $gi->free();
+        $ids = array();
 
-        return $groups;
+               foreach ($gis[$this->id] as $gi)
+               {
+                   $ids[] = $gi->group_id;
+               }
+               
+               $groups = User_group::multiGet('id', $ids);
+               
+               $this->_groups = $groups->fetchAll();
+               
+               return $this->_groups;
+    }
+    
+    function _setGroups($groups)
+    {
+        $this->_groups = $groups;
     }
 
     /**
@@ -1300,21 +1498,29 @@ class Notice extends Memcached_DataObject
 
         if (Event::handle('StartNoticeAsActivity', array($this, &$act))) {
 
+            $act->id      = $this->uri;
+            $act->time    = strtotime($this->created);
+            $act->link    = $this->bestUrl();
+            $act->content = common_xml_safe_str($this->rendered);
+            $act->title   = common_xml_safe_str($this->content);
+
             $profile = $this->getProfile();
 
             $act->actor            = ActivityObject::fromProfile($profile);
             $act->actor->extra[]   = $profile->profileInfo($cur);
-            $act->verb             = ActivityVerb::POST;
-            $act->objects[]        = ActivityObject::fromNotice($this);
 
-            // XXX: should this be handled by default processing for object entry?
+            $act->verb = $this->verb;
 
-            $act->time    = strtotime($this->created);
-            $act->link    = $this->bestUrl();
+            if ($this->repeat_of) {
+                $repeated = Notice::staticGet('id', $this->repeat_of);
+                if (!empty($repeated)) {
+                    $act->objects[] = $repeated->asActivity($cur);
+                }
+            } else {
+                $act->objects[] = ActivityObject::fromNotice($this);
+            }
 
-            $act->content = common_xml_safe_str($this->rendered);
-            $act->id      = $this->uri;
-            $act->title   = common_xml_safe_str($this->content);
+            // XXX: should this be handled by default processing for object entry?
 
             // Categories
 
@@ -1363,9 +1569,9 @@ class Notice extends Memcached_DataObject
             $reply_ids = $this->getReplies();
 
             foreach ($reply_ids as $id) {
-                $profile = Profile::staticGet('id', $id);
-                if (!empty($profile)) {
-                    $ctx->attention[] = $profile->getUri();
+                $rprofile = Profile::staticGet('id', $id);
+                if (!empty($rprofile)) {
+                    $ctx->attention[] = $rprofile->getUri();
                 }
             }
 
@@ -1528,61 +1734,6 @@ class Notice extends Memcached_DataObject
         }
     }
 
-    function stream($fn, $args, $cachekey, $offset=0, $limit=20, $since_id=0, $max_id=0)
-    {
-        $cache = common_memcache();
-
-        if (empty($cache) ||
-            $since_id != 0 || $max_id != 0 ||
-            is_null($limit) ||
-            ($offset + $limit) > NOTICE_CACHE_WINDOW) {
-            return call_user_func_array($fn, array_merge($args, array($offset, $limit, $since_id,
-                                                                      $max_id)));
-        }
-
-        $idkey = common_cache_key($cachekey);
-
-        $idstr = $cache->get($idkey);
-
-        if ($idstr !== false) {
-            // Cache hit! Woohoo!
-            $window = explode(',', $idstr);
-            $ids = array_slice($window, $offset, $limit);
-            return $ids;
-        }
-
-        $laststr = $cache->get($idkey.';last');
-        
-        if ($laststr !== false) {
-            $window = explode(',', $laststr);
-            $last_id = $window[0];
-            $new_ids = call_user_func_array($fn, array_merge($args, array(0, NOTICE_CACHE_WINDOW,
-                                                                          $last_id, 0, null)));
-            
-            $new_window = array_merge($new_ids, $window);
-
-            $new_windowstr = implode(',', $new_window);
-            
-            $result = $cache->set($idkey, $new_windowstr);
-            $result = $cache->set($idkey . ';last', $new_windowstr);
-            
-            $ids = array_slice($new_window, $offset, $limit);
-            
-            return $ids;
-        }
-
-        $window = call_user_func_array($fn, array_merge($args, array(0, NOTICE_CACHE_WINDOW,
-                                                                     0, 0, null)));
-
-        $windowstr = implode(',', $window);
-
-        $result = $cache->set($idkey, $windowstr);
-        $result = $cache->set($idkey . ';last', $windowstr);
-
-        $ids = array_slice($window, $offset, $limit);
-
-        return $ids;
-    }
 
     /**
      * Determine which notice, if any, a new notice is in reply to.
@@ -1617,7 +1768,7 @@ class Notice extends Memcached_DataObject
         if (!empty($reply_to)) {
             $reply_notice = Notice::staticGet('id', $reply_to);
             if (!empty($reply_notice)) {
-                return $reply_to;
+                return $reply_notice;
             }
         }
 
@@ -1656,8 +1807,10 @@ class Notice extends Memcached_DataObject
         $last = $recipient->getCurrentNotice();
 
         if (!empty($last)) {
-            return $last->id;
+            return $last;
         }
+
+        return null;
     }
 
     static function maxContent()
@@ -1693,6 +1846,15 @@ class Notice extends Memcached_DataObject
         return $location;
     }
 
+    /**
+     * Convenience function for posting a repeat of an existing message.
+     *
+     * @param int $repeater_id: profile ID of user doing the repeat
+     * @param string $source: posting source key, eg 'web', 'api', etc
+     * @return Notice
+     *
+     * @throws Exception on failure or permission problems
+     */
     function repeat($repeater_id, $source)
     {
         $author = Profile::staticGet('id', $this->profile_id);
@@ -1714,25 +1876,34 @@ class Notice extends Memcached_DataObject
             $content = mb_substr($content, 0, $maxlen - 4) . ' ...';
         }
 
-        return self::saveNew($repeater_id, $content, $source,
-                             array('repeat_of' => $this->id));
+        // Scope is same as this one's
+
+        return self::saveNew($repeater_id,
+                             $content,
+                             $source,
+                             array('repeat_of' => $this->id,
+                                   'scope' => $this->scope));
     }
 
     // These are supposed to be in chron order!
 
     function repeatStream($limit=100)
     {
-        $cache = common_memcache();
+        $cache = Cache::instance();
 
         if (empty($cache)) {
             $ids = $this->_repeatStreamDirect($limit);
         } else {
-            $idstr = $cache->get(common_cache_key('notice:repeats:'.$this->id));
+            $idstr = $cache->get(Cache::key('notice:repeats:'.$this->id));
             if ($idstr !== false) {
-                $ids = explode(',', $idstr);
+               if (empty($idstr)) {
+                       $ids = array();
+               } else {
+                       $ids = explode(',', $idstr);
+               }
             } else {
                 $ids = $this->_repeatStreamDirect(100);
-                $cache->set(common_cache_key('notice:repeats:'.$this->id), implode(',', $ids));
+                $cache->set(Cache::key('notice:repeats:'.$this->id), implode(',', $ids));
             }
             if ($limit < 100) {
                 // We do a max of 100, so slice down to limit
@@ -1740,7 +1911,7 @@ class Notice extends Memcached_DataObject
             }
         }
 
-        return Notice::getStreamByIds($ids);
+        return NoticeStream::getStreamByIds($ids);
     }
 
     function _repeatStreamDirect($limit)
@@ -1758,18 +1929,7 @@ class Notice extends Memcached_DataObject
             $notice->limit(0, $limit);
         }
 
-        $ids = array();
-
-        if ($notice->find()) {
-            while ($notice->fetch()) {
-                $ids[] = $notice->id;
-            }
-        }
-
-        $notice->free();
-        $notice = NULL;
-
-        return $ids;
+        return $notice->fetchAll('id');
     }
 
     function locationOptions($lat, $lon, $location_id, $location_ns, $profile = null)
@@ -1898,10 +2058,10 @@ class Notice extends Memcached_DataObject
 
         if ($tag->find()) {
             while ($tag->fetch()) {
-                self::blow('profile:notice_ids_tagged:%d:%s', $this->profile_id, common_keyize($tag->tag));
-                self::blow('profile:notice_ids_tagged:%d:%s;last', $this->profile_id, common_keyize($tag->tag));
-                self::blow('notice_tag:notice_ids:%s', common_keyize($tag->tag));
-                self::blow('notice_tag:notice_ids:%s;last', common_keyize($tag->tag));
+                self::blow('profile:notice_ids_tagged:%d:%s', $this->profile_id, Cache::keyize($tag->tag));
+                self::blow('profile:notice_ids_tagged:%d:%s;last', $this->profile_id, Cache::keyize($tag->tag));
+                self::blow('notice_tag:notice_ids:%s', Cache::keyize($tag->tag));
+                self::blow('notice_tag:notice_ids:%s;last', Cache::keyize($tag->tag));
                 $tag->delete();
             }
         }
@@ -2030,17 +2190,32 @@ class Notice extends Memcached_DataObject
                 $this->is_local == Notice::LOCAL_NONPUBLIC);
     }
 
+    /**
+     * Get the list of hash tags saved with this notice.
+     *
+     * @return array of strings
+     */
     public function getTags()
     {
         $tags = array();
-        $tag = new Notice_tag();
-        $tag->notice_id = $this->id;
-        if ($tag->find()) {
-            while ($tag->fetch()) {
-                $tags[] = $tag->tag;
+
+        $keypart = sprintf('notice:tags:%d', $this->id);
+
+        $tagstr = self::cacheGet($keypart);
+
+        if ($tagstr !== false) {
+            $tags = explode(',', $tagstr);
+        } else {
+            $tag = new Notice_tag();
+            $tag->notice_id = $this->id;
+            if ($tag->find()) {
+                while ($tag->fetch()) {
+                    $tags[] = $tag->tag;
+                }
             }
+            self::cacheSet($keypart, implode(',', $tags));
         }
-        $tag->free();
+
         return $tags;
     }
 
@@ -2164,4 +2339,401 @@ class Notice extends Memcached_DataObject
                     ($this->is_local != Notice::GATEWAY));
         }
     }
+
+    /**
+     * Check that the given profile is allowed to read, respond to, or otherwise
+     * act on this notice.
+     *
+     * The $scope member is a bitmask of scopes, representing a logical AND of the
+     * scope requirement. So, 0x03 (Notice::ADDRESSEE_SCOPE | Notice::SITE_SCOPE) means
+     * "only visible to people who are mentioned in the notice AND are users on this site."
+     * Users on the site who are not mentioned in the notice will not be able to see the
+     * notice.
+     *
+     * @param Profile $profile The profile to check; pass null to check for public/unauthenticated users.
+     *
+     * @return boolean whether the profile is in the notice's scope
+     */
+    function inScope($profile)
+    {
+        if (is_null($profile)) {
+            $keypart = sprintf('notice:in-scope-for:%d:null', $this->id);
+        } else {
+            $keypart = sprintf('notice:in-scope-for:%d:%d', $this->id, $profile->id);
+        }
+
+        $result = self::cacheGet($keypart);
+
+        if ($result === false) {
+            $bResult = false;
+            if (Event::handle('StartNoticeInScope', array($this, $profile, &$bResult))) {
+                $bResult = $this->_inScope($profile);
+                Event::handle('EndNoticeInScope', array($this, $profile, &$bResult));
+            }
+            $result = ($bResult) ? 1 : 0;
+            self::cacheSet($keypart, $result, 0, 300);
+        }
+
+        return ($result == 1) ? true : false;
+    }
+
+    protected function _inScope($profile)
+    {
+        if (!is_null($this->scope)) {
+            $scope = $this->scope;
+        } else {
+            $scope = self::defaultScope();
+        }
+
+        // If there's no scope, anyone (even anon) is in scope.
+
+        if ($scope == 0) { // Not private
+
+            return !$this->isHiddenSpam($profile);
+
+        } else { // Private, somehow
+
+            // If there's scope, anon cannot be in scope
+
+            if (empty($profile)) {
+                return false;
+            }
+
+            // Author is always in scope
+
+            if ($this->profile_id == $profile->id) {
+                return true;
+            }
+
+            // Only for users on this site
+
+            if ($scope & Notice::SITE_SCOPE) {
+                $user = $profile->getUser();
+                if (empty($user)) {
+                    return false;
+                }
+            }
+
+            // Only for users mentioned in the notice
+
+            if ($scope & Notice::ADDRESSEE_SCOPE) {
+
+                $repl = Reply::pkeyGet(array('notice_id' => $this->id,
+                                             'profile_id' => $profile->id));
+                                                                                
+                if (empty($repl)) {
+                    return false;
+                }
+            }
+
+            // Only for members of the given group
+
+            if ($scope & Notice::GROUP_SCOPE) {
+
+                // XXX: just query for the single membership
+
+                $groups = $this->getGroups();
+
+                $foundOne = false;
+
+                foreach ($groups as $group) {
+                    if ($profile->isMember($group)) {
+                        $foundOne = true;
+                        break;
+                    }
+                }
+
+                if (!$foundOne) {
+                    return false;
+                }
+            }
+
+            // Only for followers of the author
+
+            $author = null;
+
+            if ($scope & Notice::FOLLOWER_SCOPE) {
+
+                try {
+                    $author = $this->getProfile();
+                } catch (Exception $e) {
+                    return false;
+                }
+        
+                if (!Subscription::exists($profile, $author)) {
+                    return false;
+                }
+            }
+
+            return !$this->isHiddenSpam($profile);
+        }
+    }
+
+    function isHiddenSpam($profile) {
+        
+        // Hide posts by silenced users from everyone but moderators.
+
+        if (common_config('notice', 'hidespam')) {
+
+            try {
+                $author = $this->getProfile();
+            } catch(Exception $e) {
+                // If we can't get an author, keep it hidden.
+                // XXX: technically not spam, but, whatever.
+                return true;
+            }
+
+            if ($author->hasRole(Profile_role::SILENCED)) {
+                if (empty($profile) || (($profile->id !== $author->id) && (!$profile->hasRight(Right::REVIEWSPAM)))) {
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
+    static function groupsFromText($text, $profile)
+    {
+        $groups = array();
+
+        /* extract all !group */
+        $count = preg_match_all('/(?:^|\s)!(' . Nickname::DISPLAY_FMT . ')/',
+                                strtolower($text),
+                                $match);
+
+        if (!$count) {
+            return $groups;
+        }
+
+        foreach (array_unique($match[1]) as $nickname) {
+            $group = User_group::getForNickname($nickname, $profile);
+            if (!empty($group) && $profile->isMember($group)) {
+                $groups[] = $group->id;
+            }
+        }
+
+        return $groups;
+    }
+
+    protected $_original = -1;
+
+    function getOriginal()
+    {
+        if (is_int($this->_original) && $this->_original == -1) {
+            if (empty($this->reply_to)) {
+                $this->_original = null;
+            } else {
+                $this->_original = Notice::staticGet('id', $this->reply_to);
+            }
+        }
+        return $this->_original;
+    }
+
+    /**
+     * Magic function called at serialize() time.
+     *
+     * We use this to drop a couple process-specific references
+     * from DB_DataObject which can cause trouble in future
+     * processes.
+     *
+     * @return array of variable names to include in serialization.
+     */
+
+    function __sleep()
+    {
+        $vars = parent::__sleep();
+        $skip = array('_original', '_profile', '_groups', '_attachments', '_faves', '_replies', '_repeats');
+        return array_diff($vars, $skip);
+    }
+    
+    static function defaultScope()
+    {
+       $scope = common_config('notice', 'defaultscope');
+       if (is_null($scope)) {
+               if (common_config('site', 'private')) {
+                       $scope = 1;
+               } else {
+                       $scope = 0;
+               }
+       }
+       return $scope;
+    }
+
+       static function fillProfiles($notices)
+       {
+               $map = self::getProfiles($notices);
+               
+               foreach ($notices as $notice) {
+                       if (array_key_exists($notice->profile_id, $map)) {
+                               $notice->_setProfile($map[$notice->profile_id]);    
+                       }
+               }
+               
+               return array_values($map);
+       }
+       
+       static function getProfiles(&$notices)
+       {
+               $ids = array();
+               foreach ($notices as $notice) {
+                       $ids[] = $notice->profile_id;
+               }
+               
+               $ids = array_unique($ids);
+               
+               return Memcached_DataObject::pivotGet('Profile', 'id', $ids); 
+       }
+       
+       static function fillGroups(&$notices)
+       {
+        $ids = self::_idsOf($notices);
+               
+               $gis = Memcached_DataObject::listGet('Group_inbox', 'notice_id', $ids);
+               
+        $gids = array();
+
+               foreach ($gis as $id => $gi)
+               {
+                   foreach ($gi as $g)
+                   {
+                       $gids[] = $g->group_id;
+                   }
+               }
+               
+               $gids = array_unique($gids);
+               
+               $group = Memcached_DataObject::pivotGet('User_group', 'id', $gids);
+               
+               foreach ($notices as $notice)
+               {
+                       $grps = array();
+                       $gi = $gis[$notice->id];
+                       foreach ($gi as $g) {
+                           $grps[] = $group[$g->group_id];
+                       }
+                   $notice->_setGroups($grps);
+               }
+       }
+
+    static function _idsOf(&$notices)
+    {
+               $ids = array();
+               foreach ($notices as $notice) {
+                       $ids[] = $notice->id;
+               }
+               $ids = array_unique($ids);
+        return $ids;
+    }
+
+    static function fillAttachments(&$notices)
+    {
+        $ids = self::_idsOf($notices);
+
+               $f2pMap = Memcached_DataObject::listGet('File_to_post', 'post_id', $ids);
+               
+               $fileIds = array();
+               
+               foreach ($f2pMap as $noticeId => $f2ps) {
+            foreach ($f2ps as $f2p) {
+                $fileIds[] = $f2p->file_id;    
+            }
+        }
+
+        $fileIds = array_unique($fileIds);
+
+               $fileMap = Memcached_DataObject::pivotGet('File', 'id', $fileIds);
+
+               foreach ($notices as $notice)
+               {
+                       $files = array();
+                       $f2ps = $f2pMap[$notice->id];
+                       foreach ($f2ps as $f2p) {
+                           $files[] = $fileMap[$f2p->file_id];
+                       }
+                   $notice->_setAttachments($files);
+               }
+    }
+
+    protected $_faves;
+
+    /**
+     * All faves of this notice
+     *
+     * @return array Array of Fave objects
+     */
+
+    function getFaves()
+    {
+        if (isset($this->_faves) && is_array($this->_faves)) {
+            return $this->_faves;
+        }
+        $faveMap = Memcached_DataObject::listGet('Fave', 'notice_id', array($this->id));
+        $this->_faves = $faveMap[$this->id];
+        return $this->_faves;
+    }
+
+    function _setFaves($faves)
+    {
+        $this->_faves = $faves;
+    }
+
+    static function fillFaves(&$notices)
+    {
+        $ids = self::_idsOf($notices);
+        $faveMap = Memcached_DataObject::listGet('Fave', 'notice_id', $ids);
+        $cnt = 0;
+        $faved = array();
+        foreach ($faveMap as $id => $faves) {
+            $cnt += count($faves);
+            if (count($faves) > 0) {
+                $faved[] = $id;
+            }
+        }
+        foreach ($notices as $notice) {
+               $faves = $faveMap[$notice->id];
+            $notice->_setFaves($faves);
+        }
+    }
+
+    static function fillReplies(&$notices)
+    {
+        $ids = self::_idsOf($notices);
+        $replyMap = Memcached_DataObject::listGet('Reply', 'notice_id', $ids);
+        foreach ($notices as $notice) {
+            $replies = $replyMap[$notice->id];
+            $ids = array();
+            foreach ($replies as $reply) {
+                $ids[] = $reply->profile_id;
+            }
+            $notice->_setReplies($ids);
+        }
+    }
+
+    protected $_repeats;
+
+    function getRepeats()
+    {
+        if (isset($this->_repeats) && is_array($this->_repeats)) {
+            return $this->_repeats;
+        }
+        $repeatMap = Memcached_DataObject::listGet('Notice', 'repeat_of', array($this->id));
+        $this->_repeats = $repeatMap[$this->id];
+        return $this->_repeats;
+    }
+
+    function _setRepeats($repeats)
+    {
+        $this->_repeats = $repeats;
+    }
+
+    static function fillRepeats(&$notices)
+    {
+        $ids = self::_idsOf($notices);
+        $repeatMap = Memcached_DataObject::listGet('Notice', 'repeat_of', $ids);
+        foreach ($notices as $notice) {
+               $repeats = $repeatMap[$notice->id];
+            $notice->_setRepeats($repeats);
+        }
+    }
 }