fixup_deletions.php script to look for notices posted by now-deleted profiles and remove them.

classes/Notice.php

@@ -421,8 +421,10 @@ class Notice extends Memcached_DataObject
         }
 
         $profile = Profile::staticGet($this->profile_id);
+        if (!empty($profile)) {
             $profile->blowNoticeCount();
         }
+    }
 
     /**
      * Clear cache entries related to this notice at delete time.

scripts/fixup_deletions.php

@@ -0,0 +1,166 @@
+#!/usr/bin/env php
+<?php
+/*
+ * StatusNet - a distributed open-source microblogging tool
+ * Copyright (C) 2010 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
+ * 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/>.
+ */
+
+define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
+
+$longoptions = array('dry-run', 'start=', 'end=');
+
+$helptext = <<<END_OF_USERROLE_HELP
+fixup_deletions.php [options]
+Finds notices posted by deleted users and cleans them up.
+Stray incompletely deleted items cause various fun problems!
+
+     --dry-run  look but don't touch
+     --start=N  start looking at profile_id N instead of 1
+     --end=N    end looking at profile_id N instead of the max
+
+END_OF_USERROLE_HELP;
+
+require_once INSTALLDIR.'/scripts/commandline.inc';
+
+/**
+ * Find the highest profile_id currently listed in the notice table;
+ * this field is indexed and should return very quickly.
+ *
+ * We check notice.profile_id rather than profile.id because we're
+ * looking for notices left behind after deletion; if the most recent
+ * accounts were deleted, we wouldn't have them from profile.
+ *
+ * @return int
+ * @access private
+ */
+function get_max_profile_id()
+{
+    $query = 'SELECT MAX(profile_id) AS id FROM notice';
+
+    $profile = new Profile();
+    $profile->query($query);
+
+    if ($profile->fetch()) {
+        return intval($profile->id);
+    } else {
+        die("Something went awry; could not look up max used profile_id.");
+    }
+}
+
+/**
+ * Check for profiles in the given id range that are missing, presumed deleted.
+ *
+ * @param int $start beginning profile.id, inclusive
+ * @param int $end final profile.id, inclusive
+ * @return array of integer profile.ids
+ * @access private
+ */
+function get_missing_profiles($start, $end)
+{
+    $query = sprintf("SELECT id FROM profile WHERE id BETWEEN %d AND %d",
+                     $start, $end);
+
+    $profile = new Profile();
+    $profile->query($query);
+
+    $all = range($start, $end);
+    $known = array();
+    while ($row = $profile->fetch()) {
+        $known[] = intval($profile->id);
+    }
+    unset($profile);
+
+    $missing = array_diff($all, $known);
+    return $missing;
+}
+
+/**
+ * Look for stray notices from this profile and, if present, kill them.
+ *
+ * @param int $profile_id
+ * @param bool $dry if true, we won't delete anything
+ */
+function cleanup_missing_profile($profile_id, $dry)
+{
+    $notice = new Notice();
+    $notice->profile_id = $profile_id;
+    $notice->find();
+    if ($notice->N == 0) {
+        return;
+    }
+
+    $s = ($notice->N == 1) ? '' : 's';
+    print "Deleted profile $profile_id has $notice->N stray notice$s:\n";
+
+    while ($notice->fetch()) {
+        print "  notice $notice->id";
+        if ($dry) {
+            print " (skipped; dry run)\n";
+        } else {
+            $victim = clone($notice);
+            try {
+                $victim->delete();
+                print " (deleted)\n";
+            } catch (Exception $e) {
+                print " FAILED: ";
+                print $e->getMessage();
+                print "\n";
+            }
+        }
+    }
+}
+
+$dry = have_option('dry-run');
+
+$max_profile_id = get_max_profile_id();
+$chunk = 1000;
+
+if (have_option('start')) {
+    $begin = intval(get_option_value('start'));
+} else {
+    $begin = 1;
+}
+if (have_option('end')) {
+    $final = min($max_profile_id, intval(get_option_value('end')));
+} else {
+    $final = $max_profile_id;
+}
+
+if ($begin < 1) {
+    die("Silly human, you can't begin before profile number 1!\n");
+}
+if ($final < $begin) {
+    die("Silly human, you can't end at $final if it's before $begin!\n");
+}
+
+// Identify missing profiles...
+for ($start = $begin; $start <= $final; $start += $chunk) {
+    $end = min($start + $chunk - 1, $final);
+
+    print "Checking for missing profiles between id $start and $end";
+    if ($dry) {
+        print " (dry run)";
+    }
+    print "...\n";
+    $missing = get_missing_profiles($start, $end);
+
+    foreach ($missing as $profile_id) {
+        cleanup_missing_profile($profile_id, $dry);
+    }
+}
+
+echo "done.\n";
+