From fb8312ebf4537033077917d0003f716206d0d23d Mon Sep 17 00:00:00 2001
From: Brion Vibber <brion@pobox.com>
Date: Fri, 17 Dec 2010 17:09:54 -0800
Subject: Ticket #2959: implement api/users/profile_image endpoint in
 Twitter-compat API

---
 actions/apiuserprofileimage.php | 135 ++++++++++++++++++++++++++++++++++++++++
 lib/router.php                  |   5 ++
 2 files changed, 140 insertions(+)
 create mode 100644 actions/apiuserprofileimage.php

diff --git a/actions/apiuserprofileimage.php b/actions/apiuserprofileimage.php
new file mode 100644
index 000000000..d2cf9a3e5
--- /dev/null
+++ b/actions/apiuserprofileimage.php
@@ -0,0 +1,135 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Return a user's avatar image
+ *
+ * PHP version 5
+ *
+ * LICENCE: 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/>.
+ *
+ * @category  API
+ * @package   StatusNet
+ * @author    Brion Vibber <brion@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    exit(1);
+}
+
+require_once INSTALLDIR . '/lib/apiprivateauth.php';
+
+/**
+ * Ouputs avatar URL for a user, specified by screen name.
+ * Unlike most API endpoints, this returns an HTTP redirect rather than direct data.
+ *
+ * @category API
+ * @package  StatusNet
+ * @author   Brion Vibber <brion@status.net>
+ * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link     http://status.net/
+ */
+class ApiUserProfileImageAction extends ApiPrivateAuthAction
+{
+    /**
+     * Take arguments for running
+     *
+     * @param array $args $_REQUEST args
+     *
+     * @return boolean success flag
+     *
+     */
+    function prepare($args)
+    {
+        parent::prepare($args);
+        $this->user = User::staticGet('nickname', $this->arg('screen_name'));
+        $this->size = $this->arg('size');
+
+        return true;
+    }
+
+    /**
+     * Handle the request
+     *
+     * Check the format and show the user info
+     *
+     * @param array $args $_REQUEST data (unused)
+     *
+     * @return void
+     */
+    function handle($args)
+    {
+        parent::handle($args);
+
+        if (empty($this->user)) {
+            // TRANS: Client error displayed when requesting user information for a non-existing user.
+            $this->clientError(_('User not found.'), 404, $this->format);
+            return;
+        }
+
+        $profile = $this->user->getProfile();
+
+        if (empty($profile)) {
+            // TRANS: Client error displayed when requesting user information for a user without a profile.
+            $this->clientError(_('User has no profile.'));
+            return;
+        }
+
+        $size = $this->avatarSize();
+        $avatar = $profile->getAvatar($size);
+        if ($avatar) {
+            $url = $avatar->displayUrl();
+        } else {
+            $url = Avatar::defaultImage($size);
+        }
+
+        // We don't actually output JSON or XML data -- redirect!
+        common_redirect($url, 302);
+    }
+
+    /**
+     * Get the appropriate pixel size for an avatar based on the request...
+     *
+     * @return int
+     */
+    private function avatarSize()
+    {
+        switch ($this->size) {
+            case 'mini':
+                return AVATAR_MINI_SIZE; // 24x24
+            case 'bigger':
+                return AVATAR_PROFILE_SIZE; // Twitter does 73x73, but we do 96x96
+            case 'normal': // fall through
+            default:
+                return AVATAR_STREAM_SIZE; // 48x48
+        }
+    }
+
+    /**
+     * Return true if read only.
+     *
+     * MAY override
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean is read only action?
+     */
+    function isReadOnly($args)
+    {
+        return true;
+    }
+}
diff --git a/lib/router.php b/lib/router.php
index b8a9db223..9cd28a394 100644
--- a/lib/router.php
+++ b/lib/router.php
@@ -524,6 +524,11 @@ class Router
                               'id' => Nickname::INPUT_FMT,
                               'format' => '(xml|json)'));
 
+            $m->connect('api/users/profile_image/:screen_name.:format',
+                        array('action' => 'ApiUserProfileImage',
+                              'screen_name' => Nickname::DISPLAY_FMT,
+                              'format' => '(xml|json)'));
+
             // direct messages
 
             $m->connect('api/direct_messages.:format',
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