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<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, 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/>.
 */

if (!defined('LACONICA')) { exit(1); }

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require_once(INSTALLDIR.'/lib/twitterapi.php');

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class TwitapistatusesAction extends TwitterapiAction
{
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    function public_timeline($args, $apidata)
    {
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        parent::handle($args);

        $sitename = common_config('site', 'name');
        $siteserver = common_config('site', 'server');
        $title = sprintf(_("%s public timeline"), $sitename);
        $id = "tag:$siteserver:Statuses";
        $link = common_root_url();
        $subtitle = sprintf(_("%s updates from everyone!"), $sitename);

        // Number of public statuses to return by default -- Twitter sends 20
        $MAX_PUBSTATUSES = 20;

        // FIXME: To really live up to the spec we need to build a list
        // of notices by users who have custom avatars, so fix this SQL -- Zach

        $page = $this->arg('page');
        $since_id = $this->arg('since_id');
        $before_id = $this->arg('before_id');

        // NOTE: page, since_id, and before_id are extensions to Twitter API -- TB
        if (!$page) {
            $page = 1;
        }
        if (!$since_id) {
            $since_id = 0;
        }
        if (!$before_id) {
            $before_id = 0;
        }

        $since = strtotime($this->arg('since'));

        $notice = Notice::publicStream((($page-1)*$MAX_PUBSTATUSES), $MAX_PUBSTATUSES, $since_id, $before_id, $since);

        if ($notice) {

            switch($apidata['content-type']) {
                case 'xml':
                    $this->show_xml_timeline($notice);
                    break;
                case 'rss':
                    $this->show_rss_timeline($notice, $title, $link, $subtitle);
                    break;
                case 'atom':
                    $this->show_atom_timeline($notice, $title, $id, $link, $subtitle);
                    break;
                case 'json':
                    $this->show_json_timeline($notice);
                    break;
                default:
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                    $this->clientError(_('API method not found!'), $code = 404);
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                    break;
            }

        } else {
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            $this->serverError(_('Couldn\'t find any statuses.'), $code = 503);
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        }

    }

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    function friends_timeline($args, $apidata)
    {
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        parent::handle($args);

        $since = $this->arg('since');
        $since_id = $this->arg('since_id');
        $count = $this->arg('count');
        $page = $this->arg('page');
        $before_id = $this->arg('before_id');

        if (!$page) {
            $page = 1;
        }

        if (!$count) {
            $count = 20;
        }

        if (!$since_id) {
            $since_id = 0;
        }

        // NOTE: before_id is an extension to Twitter API -- TB
        if (!$before_id) {
            $before_id = 0;
        }

        $since = strtotime($this->arg('since'));

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        $user = $this->get_user(null, $apidata);
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        $this->auth_user = $user;

        $profile = $user->getProfile();

        $sitename = common_config('site', 'name');
        $siteserver = common_config('site', 'server');

        $title = sprintf(_("%s and friends"), $user->nickname);
        $id = "tag:$siteserver:friends:" . $user->id;
        $link = common_local_url('all', array('nickname' => $user->nickname));
        $subtitle = sprintf(_('Updates from %1$s and friends on %2$s!'), $user->nickname, $sitename);

        $notice = $user->noticesWithFriends(($page-1)*20, $count, $since_id, $before_id, $since);

        switch($apidata['content-type']) {
         case 'xml':
            $this->show_xml_timeline($notice);
            break;
         case 'rss':
            $this->show_rss_timeline($notice, $title, $link, $subtitle);
            break;
         case 'atom':
            $this->show_atom_timeline($notice, $title, $id, $link, $subtitle);
            break;
         case 'json':
            $this->show_json_timeline($notice);
            break;
         default:
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            $this->clientError(_('API method not found!'), $code = 404);
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        }

    }

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    function user_timeline($args, $apidata)
    {
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        parent::handle($args);

        $this->auth_user = $apidata['user'];
        $user = $this->get_user($apidata['api_arg'], $apidata);

        if (!$user) {
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            $this->clientError('Not Found', 404, $apidata['content-type']);
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            return;
        }

        $profile = $user->getProfile();

        if (!$profile) {
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            $this->serverError(_('User has no profile.'));
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            return;
        }

        $count = $this->arg('count');
        $since = $this->arg('since');
        $since_id = $this->arg('since_id');
        $page = $this->arg('page');
        $before_id = $this->arg('before_id');

        if (!$page) {
            $page = 1;
        }

        if (!$count) {
            $count = 20;
        }

        if (!$since_id) {
            $since_id = 0;
        }

        // NOTE: before_id is an extensions to Twitter API -- TB
        if (!$before_id) {
            $before_id = 0;
        }

        $since = strtotime($this->arg('since'));

        $sitename = common_config('site', 'name');
        $siteserver = common_config('site', 'server');

        $title = sprintf(_("%s timeline"), $user->nickname);
        $id = "tag:$siteserver:user:".$user->id;
        $link = common_local_url('showstream', array('nickname' => $user->nickname));
        $subtitle = sprintf(_('Updates from %1$s on %2$s!'), $user->nickname, $sitename);

        # FriendFeed's SUP protocol
        # Also added RSS and Atom feeds

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        $suplink = common_local_url('sup', null, null, $user->id);
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        header('X-SUP-ID: '.$suplink);

        # XXX: since

        $notice = $user->getNotices((($page-1)*20), $count, $since_id, $before_id, $since);

        switch($apidata['content-type']) {
         case 'xml':
            $this->show_xml_timeline($notice);
            break;
         case 'rss':
            $this->show_rss_timeline($notice, $title, $link, $subtitle, $suplink);
            break;
         case 'atom':
            $this->show_atom_timeline($notice, $title, $id, $link, $subtitle, $suplink);
            break;
         case 'json':
            $this->show_json_timeline($notice);
            break;
         default:
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            $this->clientError(_('API method not found!'), $code = 404);
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        }

    }

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    function update($args, $apidata)
    {
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        parent::handle($args);

        if (!in_array($apidata['content-type'], array('xml', 'json'))) {
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            $this->clientError(_('API method not found!'), $code = 404);
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            return;
        }

        if ($_SERVER['REQUEST_METHOD'] != 'POST') {
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            $this->clientError(_('This method requires a POST.'), 400, $apidata['content-type']);
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            return;
        }

        $this->auth_user = $apidata['user'];
        $user = $this->auth_user;
        $status = $this->trimmed('status');
        $source = $this->trimmed('source');
        $in_reply_to_status_id = intval($this->trimmed('in_reply_to_status_id'));
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        $reserved_sources = array('web', 'omb', 'mail', 'xmpp', 'api');
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        if (!$source || in_array($source, $reserved_sources)) {
            $source = 'api';
        }
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        if (!$status) {
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            // XXX: Note: In this case, Twitter simply returns '200 OK'
            // No error is given, but the status is not posted to the
            // user's timeline.     Seems bad.     Shouldn't we throw an
            // errror? -- Zach
            return;
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        } else {
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            $status_shortened = common_shorten_links($status);
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            if (mb_strlen($status_shortened) > 140) {
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                // XXX: Twitter truncates anything over 140, flags the status
                // as "truncated." Sending this error may screw up some clients
                // that assume Twitter will truncate for them.    Should we just
                // truncate too? -- Zach
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                $this->clientError(_('That\'s too long. Max notice size is 140 chars.'), $code = 406, $apidata['content-type']);
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                return;
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            }
        }
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        // Check for commands
        $inter = new CommandInterpreter();
        $cmd = $inter->handle_command($user, $status_shortened);
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        if ($cmd) {
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            if ($this->supported($cmd)) {
                $cmd->execute(new Channel());
            }

            // cmd not supported?  Twitter just returns your latest status.
            // And, it returns your last status whether the cmd was successful
            // or not!
            $n = $user->getCurrentNotice();
            $apidata['api_arg'] = $n->id;
        } else {
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            $reply_to = null;
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            if ($in_reply_to_status_id) {

                // check whether notice actually exists
                $reply = Notice::staticGet($in_reply_to_status_id);

                if ($reply) {
                    $reply_to = $in_reply_to_status_id;
                } else {
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                    $this->clientError(_('Not found'), $code = 404, $apidata['content-type']);
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                    return;
                }
            }

            $notice = Notice::saveNew($user->id, html_entity_decode($status, ENT_NOQUOTES, 'UTF-8'),
                $source, 1, $reply_to);

            if (is_string($notice)) {
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                $this->serverError($notice);
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                return;
            }

            common_broadcast_notice($notice);
            $apidata['api_arg'] = $notice->id;
        }

        $this->show($args, $apidata);
    }

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    function replies($args, $apidata)
    {
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        parent::handle($args);

        $since = $this->arg('since');
        $count = $this->arg('count');
        $page = $this->arg('page');
        $since_id = $this->arg('since_id');
        $before_id = $this->arg('before_id');

        $this->auth_user = $apidata['user'];
        $user = $this->auth_user;
        $profile = $user->getProfile();

        $sitename = common_config('site', 'name');
        $siteserver = common_config('site', 'server');

        $title = sprintf(_('%1$s / Updates replying to %2$s'), $sitename, $user->nickname);
        $id = "tag:$siteserver:replies:".$user->id;
        $link = common_local_url('replies', array('nickname' => $user->nickname));
        $subtitle = sprintf(_('%1$s updates that reply to updates from %2$s / %3$s.'), $sitename, $user->nickname, $profile->getBestName());

        if (!$page) {
            $page = 1;
        }

        if (!$count) {
            $count = 20;
        }

        if (!$since_id) {
            $since_id = 0;
        }

        // NOTE: before_id is an extension to Twitter API -- TB
        if (!$before_id) {
            $before_id = 0;
        }

        $since = strtotime($this->arg('since'));

        $notice = $user->getReplies((($page-1)*20), $count, $since_id, $before_id, $since);
        $notices = array();

        while ($notice->fetch()) {
            $notices[] = clone($notice);
        }

        switch($apidata['content-type']) {
         case 'xml':
            $this->show_xml_timeline($notices);
            break;
         case 'rss':
            $this->show_rss_timeline($notices, $title, $link, $subtitle);
            break;
         case 'atom':
            $this->show_atom_timeline($notices, $title, $id, $link, $subtitle);
            break;
         case 'json':
            $this->show_json_timeline($notices);
            break;
         default:
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            $this->clientError(_('API method not found!'), $code = 404);
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        }

    }

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    function show($args, $apidata)
    {
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        parent::handle($args);

        if (!in_array($apidata['content-type'], array('xml', 'json'))) {
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            $this->clientError(_('API method not found!'), $code = 404);
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            return;
        }

        $this->auth_user = $apidata['user'];
        $notice_id = $apidata['api_arg'];
        $notice = Notice::staticGet($notice_id);

        if ($notice) {
            if ($apidata['content-type'] == 'xml') {
                $this->show_single_xml_status($notice);
            } elseif ($apidata['content-type'] == 'json') {
                $this->show_single_json_status($notice);
            }
        } else {
            // XXX: Twitter just sets a 404 header and doens't bother to return an err msg
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            $this->clientError(_('No status with that ID found.'), 404, $apidata['content-type']);
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        }

    }

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    function destroy($args, $apidata)
    {
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        parent::handle($args);

        if (!in_array($apidata['content-type'], array('xml', 'json'))) {
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            $this->clientError(_('API method not found!'), $code = 404);
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            return;
        }

        // Check for RESTfulness
        if (!in_array($_SERVER['REQUEST_METHOD'], array('POST', 'DELETE'))) {
            // XXX: Twitter just prints the err msg, no XML / JSON.
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            $this->clientError(_('This method requires a POST or DELETE.'), 400, $apidata['content-type']);
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            return;
        }

        $this->auth_user = $apidata['user'];
        $user = $this->auth_user;
        $notice_id = $apidata['api_arg'];
        $notice = Notice::staticGet($notice_id);

        if (!$notice) {
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            $this->clientError(_('No status found with that ID.'), 404, $apidata['content-type']);
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            return;
        }

        if ($user->id == $notice->profile_id) {
            $replies = new Reply;
            $replies->get('notice_id', $notice_id);
            $replies->delete();
            $notice->delete();

            if ($apidata['content-type'] == 'xml') {
                $this->show_single_xml_status($notice);
            } elseif ($apidata['content-type'] == 'json') {
                $this->show_single_json_status($notice);
            }
        } else {
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            $this->clientError(_('You may not delete another user\'s status.'), 403, $apidata['content-type']);
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        }

    }

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    function friends($args, $apidata)
    {
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        parent::handle($args);
        return $this->subscriptions($apidata, 'subscribed', 'subscriber');
    }

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    function followers($args, $apidata)
    {
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        parent::handle($args);

        return $this->subscriptions($apidata, 'subscriber', 'subscribed');
    }

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    function subscriptions($apidata, $other_attr, $user_attr)
    {
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        # XXX: lite

        $this->auth_user = $apidate['user'];
        $user = $this->get_user($apidata['api_arg'], $apidata);

        if (!$user) {
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            $this->clientError('Not Found', 404, $apidata['content-type']);
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            return;
        }

        $page = $this->trimmed('page');

        if (!$page || !is_numeric($page)) {
            $page = 1;
        }

        $profile = $user->getProfile();

        if (!$profile) {
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            $this->serverError(_('User has no profile.'));
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            return;
        }

        $sub = new Subscription();
        $sub->$user_attr = $profile->id;

        $since = strtotime($this->trimmed('since'));

        if ($since) {
            $d = date('Y-m-d H:i:s', $since);
            $sub->whereAdd("created > '$d'");
        }

        $sub->orderBy('created DESC');
        $sub->limit(($page-1)*100, 100);

        $others = array();

        if ($sub->find()) {
            while ($sub->fetch()) {
                $others[] = Profile::staticGet($sub->$other_attr);
            }
        } else {
            // user has no followers
        }

        $type = $apidata['content-type'];

        $this->init_document($type);
        $this->show_profiles($others, $type);
        $this->end_document($type);
    }

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    function show_profiles($profiles, $type)
    {
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        switch ($type) {
         case 'xml':
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            $this->elementStart('users', array('type' => 'array'));
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            foreach ($profiles as $profile) {
                $this->show_profile($profile);
            }
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            $this->elementEnd('users');
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            break;
         case 'json':
            $arrays = array();
            foreach ($profiles as $profile) {
                $arrays[] = $this->twitter_user_array($profile, true);
            }
            print json_encode($arrays);
            break;
         default:
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            $this->clientError(_('unsupported file type'));
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        }
    }

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    function featured($args, $apidata)
    {
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        parent::handle($args);
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        $this->serverError(_('API method under construction.'), $code=501);
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    }

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    function supported($cmd)
    {
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        $cmdlist = array('MessageCommand', 'SubCommand', 'UnsubCommand', 'FavCommand', 'OnCommand', 'OffCommand');
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        if (in_array(get_class($cmd), $cmdlist)) {
            return true;
        }
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        return false;
    }
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}