Give users more control over URL shortening

Users and administrators can set how long an URL can be before it's
shortened, and how long a notice can be before all its URLs are
shortened. They can also turn off shortening altogether.

Squashed commit of the following:

commit d136b390115829c4391b3666bb1967f190a0de35
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:39:00 2010 -0400

    use site and user settings to determine when to shorten URLs

commit 1e1c851ff3cb2da5e0dc3a0b06239a9d9c618488
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:38:40 2010 -0400

    add a method to force shortening URLs

commit 4d29ca0b91201f6df42940297ed5b64b070efe49
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:37:41 2010 -0400

    static method for getting best URL shortening service

commit a9c6a3bace0af44bcf38d1c790425a7be9c72147
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:37:11 2010 -0400

    allow 0 in numeric entries in othersettings

commit 767ff2f7ecfd7e76e8418fc79d45e61898f09382
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:36:46 2010 -0400

    allow 0 or blank string in inputs

commit 1e21af42a685f600f4a53f49a194013e78b12f20
Author: Evan Prodromou <evan@status.net>
Date:   Mon Apr 26 02:01:11 2010 -0400

    add more URL-shortening options to othersettings

commit 869a6be0f5779aff69018d02f9ac0273946040d9
Author: Evan Prodromou <evan@status.net>
Date:   Sat Apr 24 14:22:51 2010 -0400

    move url shortener superclass to lib from plugin

commit 9c0c9863d532942b99184f14e923fc3c050f8177
Author: Evan Prodromou <evan@status.net>
Date:   Sat Apr 24 14:20:28 2010 -0400

    documentation and whitespace on UrlShortenerPlugin

commit 7a1dd5798f0fcf2c03d1257a18ddcb9008879de0
Author: Evan Prodromou <evan@status.net>
Date:   Sat Apr 24 14:05:46 2010 -0400

    add defaults for URL shortening

commit d259c37ad231ca0010c60e5cfd397bb1732874a4
Author: Evan Prodromou <evan@status.net>
Date:   Sat Apr 24 13:40:10 2010 -0400

    Add User_urlshortener_prefs

    Add a table for URL shortener prefs, a corresponding class, and the
    correct mumbo-jumbo in statusnet.ini to make everything work.

1 files changed, 105 insertions, 0 deletions

diff --git a/classes/User_urlshortener_prefs.php b/classes/User_urlshortener_prefs.php
new file mode 100755
index 000000000..e0f85af01
--- /dev/null
+++ b/classes/User_urlshortener_prefs.php
@@ -0,0 +1,105 @@
+<?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/>.
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+    exit(1);
+}
+
+class User_urlshortener_prefs extends Memcached_DataObject
+{
+    ###START_AUTOCODE
+    /* the code below is auto generated do not remove the above tag */
+
+    public $__table = 'user_urlshortener_prefs';         // table name
+    public $user_id;                         // int(4)  primary_key not_null
+    public $urlshorteningservice;            // varchar(50)   default_ur1.ca
+    public $maxurllength;                    // int(4)   not_null
+    public $maxnoticelength;                 // int(4)   not_null
+    public $created;                         // datetime   not_null default_0000-00-00%2000%3A00%3A00
+    public $modified;                        // timestamp   not_null default_CURRENT_TIMESTAMP
+
+    /* Static get */
+    function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('User_urlshortener_prefs',$k,$v); }
+
+    /* the code above is auto generated do not remove the tag below */
+    ###END_AUTOCODE
+
+    function sequenceKey()
+    {
+        return array(false, false, false);
+    }
+
+    static function maxUrlLength($user)
+    {
+        $def = common_config('url', 'maxlength');
+
+        $prefs = self::getPrefs($user);
+
+        if (empty($prefs)) {
+            return $def;
+        } else {
+            return $prefs->maxurllength;
+        }
+    }
+
+    static function maxNoticeLength($user)
+    {
+        $def = common_config('url', 'maxnoticelength');
+
+        if ($def == -1) {
+            $def = Notice::maxContent();
+        }
+
+        $prefs = self::getPrefs($user);
+
+        if (empty($prefs)) {
+            return $def;
+        } else {
+            return $prefs->maxnoticelength;
+        }
+    }
+
+    static function urlShorteningService($user)
+    {
+        $def = common_config('url', 'shortener');
+
+        $prefs = self::getPrefs($user);
+
+        if (empty($prefs)) {
+            if (!empty($user)) {
+                return $user->urlshorteningservice;
+            } else {
+                return $def;
+            }
+        } else {
+            return $prefs->urlshorteningservice;
+        }
+    }
+
+    static function getPrefs($user)
+    {
+        if (empty($user)) {
+            return null;
+        }
+
+        $prefs = User_urlshortener_prefs::staticGet('user_id', $user->id);
+
+        return $prefs;
+    }
+}