From be14f409e485ae037b14bb9a0e6ae7230cbad5a8 Mon Sep 17 00:00:00 2001
From: Evan Prodromou <evan@status.net>
Date: Wed, 22 Sep 2010 12:08:39 -0400
Subject: [PATCH] initial script to restore a backed-up user

---
 scripts/restoreuser.php | 376 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 376 insertions(+)
 create mode 100644 scripts/restoreuser.php

diff --git a/scripts/restoreuser.php b/scripts/restoreuser.php
new file mode 100644
index 0000000000..363ef42fb2
--- /dev/null
+++ b/scripts/restoreuser.php
@@ -0,0 +1,376 @@
+<?php
+/*
+ * StatusNet - the 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__) . '/..'));
+
+$shortoptions = 'i:n:f:';
+$longoptions = array('id=', 'nickname=', 'file=');
+
+$helptext = <<<END_OF_RESTOREUSER_HELP
+restoreuser.php [options]
+Restore a backed-up user file to the database. If
+neither ID or name provided, will create a new user.
+
+  -i --id       ID of user to export
+  -n --nickname nickname of the user to export
+  -f --file     file to read from (STDIN by default)
+
+END_OF_RESTOREUSER_HELP;
+
+require_once INSTALLDIR.'/scripts/commandline.inc';
+require_once INSTALLDIR.'/extlib/htmLawed/htmLawed.php';
+
+function getActivityStreamDocument()
+{
+    $filename = get_option_value('f', 'file');
+
+    if (empty($filename)) {
+        show_help();
+        exit(1);
+    }
+
+    if (!file_exists($filename)) {
+        throw new Exception("No such file '$filename'.");
+    }
+
+    if (!is_file($filename)) {
+        throw new Exception("Not a regular file: '$filename'.");
+    }
+
+    if (!is_readable($filename)) {
+        throw new Exception("File '$filename' not readable.");
+    }
+
+    printfv(_("Getting backup from file '$filename'.\n"));
+
+    $xml = file_get_contents($filename);
+
+    $dom = DOMDocument::loadXML($xml);
+
+    if ($dom->documentElement->namespaceURI != Activity::ATOM ||
+        $dom->documentElement->localName != 'feed') {
+        throw new Exception("'$filename' is not an Atom feed.");
+    }
+
+    return $dom;
+}
+
+function importActivityStream($user, $doc)
+{
+    $feed = $doc->documentElement;
+
+    $subjectEl = ActivityUtils::child($feed, Activity::SUBJECT, Activity::SPEC);
+
+    if (!empty($subjectEl)) {
+        $subject = new ActivityObject($subjectEl);
+        printfv(_("Backup file for user %s (%s)\n"), $subject->id, Ostatus_profile::getActivityObjectNickname($subject));
+    } else {
+        throw new Exception("Feed doesn't have an <activity:subject> element.");
+    }
+
+    if (is_null($user)) {
+        printfv(_("No user specified; using backup user.\n"));
+        $user = userFromSubject($subject);
+    }
+
+    $entries = $feed->getElementsByTagNameNS(Activity::ATOM, 'entry');
+
+    printfv(_("%d entries in backup.\n"), $entries->length);
+
+    for ($i = $entries->length - 1; $i >= 0; $i--) {
+        try {
+            $entry = $entries->item($i);
+
+            $activity = new Activity($entry, $feed);
+
+            switch ($activity->verb) {
+            case ActivityVerb::FOLLOW:
+                subscribeProfile($user, $subject, $activity);
+                break;
+            case ActivityVerb::JOIN:
+                joinGroup($user, $activity);
+                break;
+            case ActivityVerb::POST:
+                postNote($user, $activity);
+                break;
+            default:
+                throw new Exception("Unknown verb: {$activity->verb}");
+            }
+        } catch (Exception $e) {
+            print $e->getMessage()."\n";
+            continue;
+        }
+    }
+}
+
+function subscribeProfile($user, $subject, $activity)
+{
+    $profile = $user->getProfile();
+
+    if ($activity->objects[0]->id == $subject->id) {
+
+        $other = $activity->actor;
+        $otherUser = User::staticGet('uri', $other->id);
+
+        if (!empty($otherUser)) {
+            $otherProfile = $otherUser->getProfile();
+        } else {
+            throw new Exception("Can't force remote user to subscribe.");
+        }
+        // XXX: don't do this for untrusted input!
+        Subscription::start($otherProfile, $profile);
+
+    } else if (empty($activity->actor) || $activity->actor->id == $subject->id) {
+
+        $other = $activity->objects[0];
+        $otherUser = User::staticGet('uri', $other->id);
+
+        if (!empty($otherUser)) {
+            $otherProfile = $otherUser->getProfile();
+        } else {
+            $oprofile = Ostatus_profile::ensureActivityObjectProfile($other);
+            $otherProfile = $oprofile->localProfile();
+        }
+
+        Subscription::start($profile, $otherProfile);
+    } else {
+        throw new Exception("This activity seems unrelated to our user.");
+    }
+}
+
+function joinGroup($user, $activity)
+{
+    // XXX: check that actor == subject
+
+    $uri = $activity->objects[0]->id;
+
+    $group = User_group::staticGet('uri', $uri);
+
+    if (empty($group)) {
+        $oprofile = Ostatus_profile::ensureActivityObjectProfile($activity->objects[0]);
+        if (!$oprofile->isGroup()) {
+            throw new Exception("Remote profile is not a group!");
+        }
+        $group = $oprofile->localGroup();
+    }
+
+    assert(!empty($group));
+
+    if (Event::handle('StartJoinGroup', array($group, $user))) {
+        Group_member::join($group->id, $user->id);
+        Event::handle('EndJoinGroup', array($group, $user));
+    }
+}
+
+// XXX: largely cadged from Ostatus_profile::processNote()
+
+function postNote($user, $activity)
+{
+    $note = $activity->objects[0];
+
+    $sourceUri = $note->id;
+
+    $notice = Notice::staticGet('uri', $sourceUri);
+
+    if (!empty($notice)) {
+        // This is weird.
+        $orig = clone($notice);
+        $notice->profile_id = $user->id;
+        $notice->update($orig);
+        return;
+    }
+
+    // Use summary as fallback for content
+
+    if (!empty($note->content)) {
+        $sourceContent = $note->content;
+    } else if (!empty($note->summary)) {
+        $sourceContent = $note->summary;
+    } else if (!empty($note->title)) {
+        $sourceContent = $note->title;
+    } else {
+        // @fixme fetch from $sourceUrl?
+        // @todo i18n FIXME: use sprintf and add i18n.
+        throw new ClientException("No content for notice {$sourceUri}.");
+    }
+
+    // Get (safe!) HTML and text versions of the content
+
+    $rendered = purify($sourceContent);
+    $content = html_entity_decode(strip_tags($rendered));
+
+    $shortened = common_shorten_links($content);
+
+    $options = array('is_local' => Notice::LOCAL_PUBLIC,
+                     'uri' => $sourceUri,
+                     'rendered' => $rendered,
+                     'replies' => array(),
+                     'groups' => array(),
+                     'tags' => array(),
+                     'urls' => array());
+
+    // Check for optional attributes...
+
+    if (!empty($activity->time)) {
+        $options['created'] = common_sql_date($activity->time);
+    }
+
+    if ($activity->context) {
+        // Any individual or group attn: targets?
+
+        list($options['groups'], $options['replies']) = filterAttention($activity->context->attention);
+
+        // Maintain direct reply associations
+        // @fixme what about conversation ID?
+        if (!empty($activity->context->replyToID)) {
+            $orig = Notice::staticGet('uri',
+                                      $activity->context->replyToID);
+            if (!empty($orig)) {
+                $options['reply_to'] = $orig->id;
+            }
+        }
+
+        $location = $activity->context->location;
+
+        if ($location) {
+            $options['lat'] = $location->lat;
+            $options['lon'] = $location->lon;
+            if ($location->location_id) {
+                $options['location_ns'] = $location->location_ns;
+                $options['location_id'] = $location->location_id;
+            }
+        }
+    }
+
+    // Atom categories <-> hashtags
+
+    foreach ($activity->categories as $cat) {
+        if ($cat->term) {
+            $term = common_canonical_tag($cat->term);
+            if ($term) {
+                $options['tags'][] = $term;
+            }
+        }
+    }
+
+    // Atom enclosures -> attachment URLs
+    foreach ($activity->enclosures as $href) {
+        // @fixme save these locally or....?
+        $options['urls'][] = $href;
+    }
+
+    $saved = Notice::saveNew($user->id,
+                             $content,
+                             'restore', // TODO: restore the actual source
+                             $options);
+
+    return $saved;
+}
+
+function filterAttention($attn)
+{
+    $groups = array();
+    $replies = array();
+
+    foreach (array_unique($attn) as $recipient) {
+
+        // Is the recipient a local user?
+
+        $user = User::staticGet('uri', $recipient);
+
+        if ($user) {
+            // @fixme sender verification, spam etc?
+            $replies[] = $recipient;
+            continue;
+        }
+
+        // Is the recipient a remote group?
+        $oprofile = Ostatus_profile::ensureProfileURI($recipient);
+
+        if ($oprofile) {
+            if (!$oprofile->isGroup()) {
+                // may be canonicalized or something
+                $replies[] = $oprofile->uri;
+            }
+            continue;
+        }
+
+        // Is the recipient a local group?
+        // @fixme uri on user_group isn't reliable yet
+        // $group = User_group::staticGet('uri', $recipient);
+        $id = OStatusPlugin::localGroupFromUrl($recipient);
+
+        if ($id) {
+            $group = User_group::staticGet('id', $id);
+            if ($group) {
+                // Deliver to all members of this local group if allowed.
+                $profile = $sender->localProfile();
+                if ($profile->isMember($group)) {
+                    $groups[] = $group->id;
+                } else {
+                    common_log(LOG_INFO, "Skipping reply to local group {$group->nickname} as sender {$profile->id} is not a member");
+                }
+                continue;
+            } else {
+                common_log(LOG_INFO, "Skipping reply to bogus group $recipient");
+            }
+        }
+    }
+
+    return array($groups, $replies);
+}
+
+function userFromSubject($subject)
+{
+    $user = User::staticGet('uri', $subject->id);
+
+    if (empty($user)) {
+        $attrs =
+          array('nickname' => Ostatus_profile::getActivityObjectNickname($subject),
+                'uri' => $subject->id);
+
+        $user = User::register($attrs);
+    }
+
+    $profile = $user->getProfile();
+    Ostatus_profile::updateProfile($profile, $subject);
+
+    // FIXME: Update avatar
+    return $user;
+}
+
+function purify($content)
+{
+    $config = array('safe' => 1,
+                    'deny_attribute' => 'id,style,on*');
+    return htmLawed($content, $config);
+}
+
+try {
+    try {
+        $user = getUser();
+    } catch (NoUserArgumentException $noae) {
+        $user = null;
+    }
+    $doc  = getActivityStreamDocument();
+    importActivityStream($user, $doc);
+} catch (Exception $e) {
+    print $e->getMessage()."\n";
+    exit(1);
+}