<?php
/*
 * Plugin Name: Defsem Widgets
 * Version: 1.4
 * Description: Widget collection for twitter, del.icio.us and last.fm
 * Author: Dean Scarff
 * Author URI: http://scarff.id.au/
 *
 * Copyright 2008  Dean Scarff  <dos@scarff.id.au>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2.
 */
require_once(ABSPATH . WPINC . '/functions.php');
require_once(ABSPATH . WPINC . '/widgets.php');
require_once(ABSPATH . WPINC . '/script-loader.php');

// wordpress registration /////////////////////////////////////////////
function defsem_widgets_register() {
  $options = get_option('widget_defsem');
  if (false === $options) {
    $options = array(
      twitter => array(user => 'p00ya', count => 3),
      delicious => array(user => 'p00ya', count => 10),
      lastfm => array(user => 'p00ya', count => 2));
    add_option('widget_defsem', serialize($defsem_widgets_options), '', 'no');
  } elseif (is_string($options)) {
    $options = unserialize($options);
  }
  $GLOBALS['defsem_widgets_options'] = $options;

  register_sidebar_widget('twitter', 'widget_twitter');
  register_widget_control('twitter', 'widget_twitter_control');
  register_sidebar_widget('del.icio.us', 'widget_delicious');
  register_widget_control('del.icio.us', 'widget_delicious_control');
  register_sidebar_widget('delicious tag', 'widget_delicious_tag');
  register_widget_control('delicious tag', 'widget_delicious_control');
  register_sidebar_widget('last.fm', 'widget_lastfm');
  register_widget_control('last.fm', 'widget_lastfm_control');
  add_action('wp_footer', 'defsem_widgets_footer');

  wp_enqueue_script('defsem-widgets/common',
    '/wp-content/plugins/defsem-widgets/common.min.js',
    array('jquery'));
}
defsem_widgets_register();

function defsem_widgets_update_option() {
  update_option('widget_defsem', serialize($GLOBALS['defsem_widgets_options']));
}

function defsem_widgets_control($service) {
  $options =& $GLOBALS['defsem_widgets_options'][$service];
  if (is_null($options))
    $options = array();
  $changed = false;
  if (preg_match('/\s*([0-9]+)/', $_POST["widget_${service}_count"], $m)) {
    $options['count'] = (int)$m[1];
    $changed = true;
  }
  if (preg_match('/\s*([A-Za-z0-9]+)/', $_POST["widget_{$service}_user"], $m)) {
    $options['user'] = $m[1];
    $changed = true;
  }
  if ($_POST["widget_{$service}_proxy"]) {
    $options['proxy'] = true;
    $changed = true;
  }
  if ($changed)
    defsem_widgets_update_option();

  echo <<<END_HTML
    <p><label for="widget-${service}-user">Username
      <input id="widget-${service}-user" name="widget_${service}_user" class="widefat" type="text" value="{$options['user']}" />
      </label>
    </p>
    <p><label for="widget-${service}-count">Count
      <input id="widget-${service}-count" name="widget_${service}_count" class="widefat" type="text" value="{$options['count']}" />
      </label>
    </p>
END_HTML;
  if ('delicious' === $service) {
    echo <<<END_HTML
<p><small>Note that the settings are shared between the "delicious tag" widget
  and the "deli.icio.us" widget.</small></p>
END_HTML;
  }
  if ('twitter' !== $service) {
    $checked = $options['proxy'] ? 'checked="checked"' : '';
    echo <<<END_HTML
    <p><label for="widget-${service}-proxy" title="Serve webservice from this blog's server.  This saves the browser from making an additional connection, but may reduce parallelism.">
      <input id="widget-${service}-proxy" name="widget_${service}_proxy" class="checkbox" type="checkbox"$checked />
       Proxy request
      </label>
    </p>
END_HTML;
  }
}

function defsem_widgets_footer() {
  echo <<<END_HTML
    <script type="text/javascript" defer="defer">/* <![CDATA[ */
jQuery.ajaxSetup({cache: true, ifModified: true, timeout: 20000});

END_HTML;
  echo $GLOBALS['defsem_widgets_script'];
  echo <<<END_HTML
  /* ]]> */</script>
END_HTML;
}

// twitter ////////////////////////////////////////////////////////////

function widget_twitter_script() {
  extract($GLOBALS['defsem_widgets_options']['twitter']);
  if ($proxy) {
    $siteurl = get_option('siteurl');
    $url = "$siteurl/wp-content/plugins/defsem-widgets/proxy.php?service=twitter&";
  } else {
    $url = "http://twitter.com/statuses/user_timeline/$user.json?";
  }
  return <<<END_HTML
jQuery(function(\$){\$.ajax({url: '{$url}count=$count&callback=widgetTwitterCb', dataType: 'script', cache: false, ifModified: false})});

END_HTML;
}

function widget_twitter_control() {
  defsem_widgets_control('twitter');
}

function widget_twitter($args = array()) {
  extract($args);
  extract($GLOBALS['defsem_widgets_options']['twitter']);
  if (!is_string($user) && is_numeric($count))
    return;
  $title = '<a href="http://twitter.com/'. $user .'" title="twitter" rel="me">Activity</a>';
  echo $before_widget . $before_title . $title . $after_title;
  echo '<ul id="twitter_update_list"><li></li></ul>';
  echo $after_widget . "\n";
  $GLOBALS['defsem_widgets_script'] .= widget_twitter_script();
}

// del.icio.us ////////////////////////////////////////////////////////

function widget_delicious_script() {
  extract($GLOBALS['defsem_widgets_options']['delicious']);
  if ($proxy) {
    $siteurl = get_option('siteurl');
    $url = "$siteurl/wp-content/plugins/defsem-widgets/proxy.php?service=delicious&";
  } else {
    $url = "http://feeds.delicious.com/v2/json/$user?";
  }
  return <<<END_HTML
jQuery(function(\$){\$.getScript('{$url}count=$count&callback=widgetDeliciousCb')});

END_HTML;
}

function widget_delicious_control() {
  defsem_widgets_control('delicious');
}

function widget_delicious($args = array()) {
  extract($args);
  extract($GLOBALS['defsem_widgets_options']['delicious']);
  if (!is_string($user) && is_numeric($count))
    return;
  $title = '<a href="http://del.icio.us/'. $user .'/" title="del.icio.us" rel="me">Links</a>';
  echo $before_widget . $before_title . $title . $after_title;
  echo '<ul id="delicious_post_list"><li></li></ul>';
  echo $after_widget . "\n";
  $GLOBALS['defsem_widgets_script'] .= widget_delicious_script();
}

// del.icio.us tag ////////////////////////////////////////////////////

function widget_delicious_tag_script() {
  if (!is_tag())
    return; // only display for tag archives
  extract($GLOBALS['defsem_widgets_options']['delicious']);
  $tag = single_tag_title('', false);
  if ($proxy) {
    $siteurl = get_option('siteurl');
    $url = "$siteurl/wp-content/plugins/defsem-widgets/proxy.php?service=delicious_tag&tag=$tag&";
  } else {
    $url = "http://feeds.delicious.com/v2/json/network/$user/$tag?";
  }
  return <<<END_HTML
jQuery(function(\$){\$.getScript('{$url}count=$count&callback=widgetDeliciousTagCb')});

END_HTML;
}

function widget_delicious_tag($args = array()) {
  if (!is_tag())
    return; // only display for tag archives
  extract($args);
  extract($GLOBALS['defsem_widgets_options']['delicious']);
  $tag = single_tag_title('', false);
  if (!is_string($user) && is_numeric($count))
    return;
  $title = "<a href='http://del.icio.us/network/$user/$tag' title='del.icio.us' rel='me'>$tag Links</a>";
  echo $before_widget . $before_title . $title . $after_title;
  echo '<ul id="delicious_tag_post_list"><li>No links</li></ul>';
  echo $after_widget . "\n";
  $GLOBALS['defsem_widgets_script'] .= widget_delicious_tag_script();
}


// last.fm ////////////////////////////////////////////////////////////

function widget_lastfm_script() {
  extract($GLOBALS['defsem_widgets_options']['lastfm']);
  $siteurl = get_option('siteurl');
  return <<<END_HTML
jQuery(function(\$){\$.getScript('$siteurl/wp-content/plugins/defsem-widgets/proxy.php?service=lastfm&user=$user&count=$count&callback=widgetLastfmCb')});

END_HTML;
}

function widget_lastfm_control() {
  defsem_widgets_control('lastfm');
}

function widget_lastfm($args = array()) {
  if (is_array($args))
    extract($args);
  extract($GLOBALS['defsem_widgets_options']['lastfm']);
  if (!is_string($user) && is_numeric($count))
    return;
  $title = '<a href="http://www.last.fm/user/'. $user .'" title="last.fm" rel="me">Tunes</a>';
  echo $before_widget . $before_title . $title . $after_title;
  echo '<ul id="lastfm_recent_list"><li>Silence</li></ul>';
  echo $after_widget . "\n";
  $GLOBALS['defsem_widgets_script'] .= widget_lastfm_script();
}

?>