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 */
23require_once($CFG->libdir.'/portfolio/plugin.php');
24require_once($CFG->libdir.'/googleapi.php');
25
26class 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}
146