portfolio/picasa/lib.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Picasa Portfolio Plugin
  19  *
  20  * @author Dan Poltawski <talktodan@gmail.com>
  21  * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
  22  */
  23 require_once($CFG->libdir.'/portfolio/plugin.php');
  24 require_once($CFG->libdir.'/googleapi.php');
  25
  26 class portfolio_plugin_picasa extends portfolio_plugin_push_base {
  27     private $googleoauth = null;
  28
  29     public function supported_formats() {
  30         return array(PORTFOLIO_FORMAT_IMAGE, PORTFOLIO_FORMAT_VIDEO);
  31     }
  32
  33     public static function get_name() {
  34         return get_string('pluginname', 'portfolio_picasa');
  35     }
  36
  37     public function prepare_package() {
  38         // We send the files as they are, no prep required.
  39         return true;
  40     }
  41
  42     public function get_interactive_continue_url() {
  43         return 'http://picasaweb.google.com/';
  44     }
  45
  46     public function expected_time($callertime) {
  47         // We're forcing this to be run 'interactively' because the plugin
  48         // does not support running in cron.
  49         return PORTFOLIO_TIME_LOW;
  50     }
  51
  52     public function send_package() {
  53         if (!$this->googleoauth) {
  54             throw new portfolio_plugin_exception('noauthtoken', 'portfolio_picasa');
  55         }
  56
  57         $picasa = new google_picasa($this->googleoauth);
  58         foreach ($this->exporter->get_tempfiles() as $file) {
  59
  60             if (!$picasa->send_file($file)) {
  61                 throw new portfolio_plugin_exception('sendfailed', 'portfolio_picasa', $file->get_filename());
  62             }
  63         }
  64     }
  65
  66     public function steal_control($stage) {
  67         if ($stage != PORTFOLIO_STAGE_CONFIG) {
  68             return false;
  69         }
  70
  71         $this->initialize_oauth();
  72
  73         if ($this->googleoauth->is_logged_in()) {
  74             return false;
  75         } else {
  76             return $this->googleoauth->get_login_url();
  77         }
  78     }
  79
  80     public function post_control($stage, $params) {
  81         if ($stage != PORTFOLIO_STAGE_CONFIG) {
  82             return;
  83         }
  84
  85         $this->initialize_oauth();
  86         if ($this->googleoauth->is_logged_in()) {
  87             return false;
  88         } else {
  89             return $this->googleoauth->get_login_url();
  90         }
  91     }
  92
  93     public static function has_admin_config() {
  94         return true;
  95     }
  96
  97     public static function allows_multiple_instances() {
  98         return false;
  99     }
 100
 101     public static function get_allowed_config() {
 102         return array('clientid', 'secret');
 103     }
 104
 105     public static function admin_config_form(&$mform) {
 106         $a = new stdClass;
 107         $a->docsurl = get_docs_url('Google_OAuth_2.0_setup');
 108         $a->callbackurl = google_oauth::callback_url()->out(false);
 109
 110         $mform->addElement('static', null, '', get_string('oauthinfo', 'portfolio_picasa', $a));
 111
 112         $mform->addElement('text', 'clientid', get_string('clientid', 'portfolio_picasa'));
 113         $mform->setType('clientid', PARAM_RAW_TRIMMED);
 114         $mform->addElement('text', 'secret', get_string('secret', 'portfolio_picasa'));
 115         $mform->setType('secret', PARAM_RAW_TRIMMED);
 116
 117         $strrequired = get_string('required');
 118         $mform->addRule('clientid', $strrequired, 'required', null, 'client');
 119         $mform->addRule('secret', $strrequired, 'required', null, 'client');
 120     }
 121
 122     private function initialize_oauth() {
 123         $returnurl = new moodle_url('/portfolio/add.php');
 124         $returnurl->param('postcontrol', 1);
 125         $returnurl->param('id', $this->exporter->get('id'));
 126         $returnurl->param('sesskey', sesskey());
 127
 128         $clientid = $this->get_config('clientid');
 129         $secret = $this->get_config('secret');
 130
 131         $this->googleoauth = new google_oauth($clientid, $secret, $returnurl, google_picasa::REALM);
 132     }
 133
 134     public function instance_sanity_check() {
 135         $clientid = $this->get_config('clientid');
 136         $secret = $this->get_config('secret');
 137
 138         // If there is no oauth config (e.g. plugins upgraded from < 2.3 then
 139         // there will be no config and this plugin should be disabled.
 140         if (empty($clientid) or empty($secret)) {
 141             return 'nooauthcredentials';
 142         }
 143         return 0;
 144     }
 145 }