<?php
//  $Id: cumulus.module,v 1.1.4.6 2008-11-13 11:11:48 lut4rp Exp $

/**
 * @file
 * Provides a Flash-based 3D tag cloud.
 * Based on WP-Cumulus for WordPress, by Roy Tanck.
 */

/**
 * Implementation of hook_block().
 */
function cumulus_block($op = 'list', $delta = 0, $edit = array()) {
  switch ($op) {
    case 'list':
      $blocks[0] = array(
        'info' => t('Cumulus Tag Cloud'),
      );
      return $blocks;
    case 'configure':
      $form['vid'] = array(
        '#type' => 'textfield',
        '#title' => t('Vocabulary ID'),
        '#default_value' => variable_get('cumulus_vid', 1),
        '#maxlength' => 3,
        '#description' => t('The ID of the vocabulary to display.'),
      );
      $form['tagadelic_step'] = array(
        '#type' => 'textfield',
        '#title' => t('Tag size interval'),
        '#default_value' => variable_get('cumulus_tagadelic_step', 6),
        '#maxlength' => 2,
        '#description' => t('The number of tag sizes you want to use.'),
      );
      $form['tagadelic_limit'] = array(
        '#type' => 'textfield',
        '#title' => t('Number of tags to display'),
        '#default_value' => variable_get('cumulus_tagadelic_limit', 24),
        '#maxlength' => 2,
        '#description' => t('The number of tags to display.'),
      );
      $form['flash_width'] = array(
        '#type' => 'textfield',
        '#title' => t('Width of cumulus'),
        '#default_value' => variable_get('cumulus_flash_width', 200),
        '#maxlength' => 3,
        '#description' => t('The width of the cumulus in pixels.'),
      );
      $form['flash_height'] = array(
        '#type' => 'textfield',
        '#title' => t('Height of cumulus'),
        '#default_value' => variable_get('cumulus_flash_height', 150),
        '#maxlength' => 3,
        '#description' => t('The height of the cumulus in pixels.'),
      );
      $form['flash_background'] = array(
        '#type' => 'textfield',
        '#title' => t('Background color of cumulus'),
        '#default_value' => variable_get('cumulus_flash_background', 'ffffff'),
        '#maxlength' => 6,
        '#description' => t('The hex color value for the background of the cumulus. E.g. ffffff. If "Background transparency" is enabled this option has no effect.'),
      );
      $form['flash_transparency'] = array(
        '#type' => 'select',
        '#title' => t('Background transparency'),
        '#default_value' => variable_get('cumulus_flash_transparency', 'false'),
        '#options' => array(
          'false' => t('no'),
          'true' => t('yes'),
        ),
        '#description' => t('Enabling background transparency might cause issues with some (mostly older) browsers. Under Linux, transparency doesn\'t work at all due to a known limitation in the Flash player.'),
      );
      $form['flash_color'] = array(
        '#type' => 'textfield',
        '#title' => t('Font color of cumulus'),
        '#default_value' => variable_get('cumulus_flash_color', '000000'),
        '#maxlength' => 6,
        '#description' => t('The hex color value you would like to use for the tags. E.g. 000000.'),
      );
      $form['flash_speed'] = array(
        '#type' => 'textfield',
        '#title' => t('Rotation speed'),
        '#default_value' => variable_get('cumulus_flash_speed', 150),
        '#maxlength' => 3,
        '#description' => t('Set the speed of the cumulus. Options between 25 and 500 work best.'),
      );
      $form['flash_distribute'] = array(
        '#type' => 'select',
        '#title' => t('Distribute tags evenly on cumulus'),
        '#default_value' => variable_get('cumulus_flash_distribute', 'true'),
        '#options' => array(
          'false' => t('no'),
          'true' => t('yes'),
        ),
        '#description' => t('When enabled, the movie will attempt to distribute the tags evenly over the surface of the cumulus.'),
      );
      $form['flash_font_size'] = array(
        '#type' => 'textfield',
        '#title' => t('Font size'),
        '#default_value' => variable_get('cumulus_flash_font_size', 10),
        '#maxlength' => 2,
        '#description' => t('Set the font size of the tag with the lowest tag-size in pixels (level 1).'),
      );
      $form['flash_font_size_interval'] = array(
        '#type' => 'textfield',
        '#title' => t('Font size interval'),
        '#default_value' => variable_get('cumulus_flash_font_size_interval', 2),
        '#maxlength' => 1,
        '#description' => t('Set the font size interval used for the different tag-sizes (level 2 and higher).'),
      );
      return $form;
    case 'save':
      variable_set('cumulus_vid', $edit['vid']);
      variable_set('cumulus_tagadelic_step', $edit['tagadelic_step']);
      variable_set('cumulus_tagadelic_limit', $edit['tagadelic_limit']);
      variable_set('cumulus_flash_width', $edit['flash_width']);
      variable_set('cumulus_flash_height', $edit['flash_height']);
      variable_set('cumulus_flash_background', $edit['flash_background']);
      variable_set('cumulus_flash_transparency', $edit['flash_transparency']);
      variable_set('cumulus_flash_color', $edit['flash_color']);
      variable_set('cumulus_flash_speed', $edit['flash_speed']);
      variable_set('cumulus_flash_distribute', $edit['flash_distribute']);
      variable_set('cumulus_flash_font_size', $edit['flash_font_size']);
      variable_set('cumulus_flash_font_size_interval', $edit['flash_font_size_interval']);
      return;
    case 'view':
      // Tagadelic API
      $tags = tagadelic_get_weighted_tags(array(variable_get('cumulus_vid', 1)), variable_get('cumulus_tagadelic_step', 6), variable_get('cumulus_tagadelic_limit', 24));
      $tags = tagadelic_sort_tags($tags);
      // theme tags for cumulus: tags tag, font size, link, encode
      $tags_formatted_flash = theme('cumulus_weighted', $tags);
      // alternate content if flash or JS are disabled
      $tags_formatted_alt = theme('tagadelic_weighted', $tags);
      // JS for Flash
      $js = drupal_get_path('module', 'cumulus') .'/cumulus.js';
      if (file_exists($js)) {
        drupal_add_js($js);
      } 
      else {
        drupal_set_message(t('The file @folder is missing. Please download it from http://pratul.in/files/cumulus.js, and add it to the Cumulus module folder! See README.txt for further instructions.', array('@folder' => $js)), 'error');
      }
      // Flash params
      $param = array(
        'path_to_flash' => base_path() . drupal_get_path('module', 'cumulus') .'/cumulus.swf',
        'width' => variable_get('cumulus_flash_width', 1),
        'height' => variable_get('cumulus_flash_height', 1),
        'background' => variable_get('cumulus_flash_background', 'ffffff'),
        'color' => '0x'. variable_get('cumulus_flash_color', '000000'),
        'speed' => variable_get('cumulus_flash_speed', 220),
        'distribute' => variable_get('cumulus_flash_distribute', 'true'),
      );
      if (variable_get('cumulus_flash_transparency', 'false') == 'true') {
        $param['transparency'] = 'widget_so.addParam("wmode", "transparent");';
      }
      // link to view with additional tags
      $links['more'] = l(t('more tags'), 'tagadelic/chunk/'. variable_get('cumulus_vid', 1));
      // output content
      $blocks['subject'] = t('Cumulus Tag Cloud');
      // param with value 9 indicates required version of flash player - see http://blog.deconcept.com/swfobject/
      $blocks['content'] = <<<EOT
        <div id="tags">
        {$tags_formatted_alt}
        <script type="text/javascript">
          var rnumber = Math.floor(Math.random()*9999999);
          var widget_so = new SWFObject("{$param['path_to_flash']}?r="+rnumber, "cumulusflash", "{$param['width']}", "{$param['height']}", "9", "{$param['background']}");
          {$param['transparency']}
          widget_so.addParam("allowScriptAccess", "always");
          widget_so.addVariable("tcolor", "{$param['color']}");
          widget_so.addVariable("tspeed", "{$param['speed']}");
          widget_so.addVariable("distr", "{$param['distribute']}");
          widget_so.addVariable("mode", "tags");
          widget_so.addVariable("tagcloud", "{$tags_formatted_flash}");
          widget_so.write("tags");
        </script>
        </div>
        <div class="more-link">{$links['more']}</div>
EOT;
      return $blocks;
  }
}

/**
 * Theme function
 */
function theme_cumulus_weighted($terms) {
  $output = '<tags>';
  foreach ($terms as $term) {
    // assign font size
    $font_size = (intval($term->weight) * variable_get('cumulus_flash_font_size_interval', 2)) + (variable_get('cumulus_flash_font_size', 10) - variable_get('cumulus_flash_font_size_interval', 2));
    $output .= l($term->name, taxonomy_term_path($term), array('style' => '"font-size:'. $font_size .'px;"')) ." \n";
  }
  $output .= '</tags>';
  $output = urlencode($output);
  return $output;
}