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, 0 insertions, 95 deletions

diff --git a/plugins/UrlShortener/UrlShortenerPlugin.php b/plugins/UrlShortener/UrlShortenerPlugin.php
deleted file mode 100644
index 027624b7a..000000000
--- a/plugins/UrlShortener/UrlShortenerPlugin.php
+++ /dev/null
@@ -1,95 +0,0 @@
-<?php
-/**
- * StatusNet, the distributed open-source microblogging tool
- *
- * Superclass for plugins that do URL shortening
- *
- * 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  Plugin
- * @package   StatusNet
- * @author    Craig Andrews <candrews@integralblue.com>
- * @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') && !defined('LACONICA')) {
-    exit(1);
-}
-
-/**
- * Superclass for plugins that do URL shortening
- *
- * @category Plugin
- * @package  StatusNet
- * @author   Craig Andrews <candrews@integralblue.com>
- * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
- * @link     http://status.net/
- */
-
-abstract class UrlShortenerPlugin extends Plugin
-{
-    public $shortenerName;
-    public $freeService=false;
-    //------------Url Shortener plugin should implement some (or all) of these methods------------\\
-
-    /**
-    * Short a URL
-    * @param url
-    * @return string shortened version of the url, or null if URL shortening failed
-    */
-    protected abstract function shorten($url);
-
-    //------------These methods may help you implement your plugin------------\\
-    protected function http_get($url)
-    {
-        $request = HTTPClient::start();
-        $response = $request->get($url);
-        return $response->getBody();
-    }
-
-    protected function http_post($url,$data)
-    {
-        $request = HTTPClient::start();
-        $response = $request->post($url, null, $data);
-        return $response->getBody();
-    }
-
-    //------------Below are the methods that connect StatusNet to the implementing Url Shortener plugin------------\\
-
-    function onInitializePlugin(){
-        if(!isset($this->shortenerName)){
-            throw new Exception("must specify a shortenerName");
-        }
-    }
-
-    function onGetUrlShorteners(&$shorteners)
-    {
-        $shorteners[$this->shortenerName]=array('freeService'=>$this->freeService);
-    }
-
-    function onStartShortenUrl($url,$shortenerName,&$shortenedUrl)
-    {
-        if($shortenerName == $this->shortenerName && strlen($url) >= common_config('site', 'shorturllength')){
-            $result = $this->shorten($url);
-            if(isset($result) && $result != null && $result !== false){
-                $shortenedUrl=$result;
-                common_log(LOG_INFO, __CLASS__ . ": $this->shortenerName shortened $url to $shortenedUrl");
-                return false;
-            }
-        }
-    }
-}