<?php
// $Id: share.module,v 1.34 2008-07-26 16:52:11 greenskin Exp $

/**
 * share.module@file
 * Provides a popup that modules can put their links/forms related to sharing.
 *
 * This module allows the creation of Share popups which provides tabs for each
 * enabled module which utilizes the hooks provided by Share, these tabs then
 * contain link/forms provided by the module. Share popups can be created and
 * set to appear on different pages as well as set which tabs will be shown and
 * the style of the popup.
 *
 * Written by greenSkin. Development sponsored by the It Is Written.
 * http://www.itiswritten.org
 */

$path = drupal_get_path('module', 'share');
  require_once("$path/share_classes.inc");

/*******************************************************************************
 * Hook Functions (Drupal)
 ******************************************************************************/

/**
 * Implementation of hook_perm().
 */
function share_perm() {
  return array('administer share', 'use sharethis', 'use share');
}

/**
 * Implementation of hook_menu().
 */
function share_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/build/share',
      'title' => t('Share'),
      'description' => t('Manage Share popups'),
      'callback' => 'share_admin_popups',
      'access' => user_access('administer share')
    );
    $items[] = array(
      'path' => 'admin/build/share/list',
      'title' => t("List"),
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => -1,
    );
    $items[] = array(
      'path' => 'admin/build/share/add',
      'title' => t('Add popup'),
      'description' => t('Add a new Share popup.'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('share_admin_popups_add'),
      'type' => MENU_LOCAL_TASK
    );
    $items[] = array(
      'path' => 'admin/build/share/add/share',
      'title' => t('Share'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('share_admin_popups_share_form'),
      'type' => MENU_CALLBACK,
      'access' => share_add_share_access()
    );
    $items[] = array(
      'path' => 'admin/build/share/add/sharethis',
      'title' => t('ShareThis'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('share_admin_popups_sharethis_form'),
      'type' => MENU_CALLBACK
    );
  } else {
    if (arg(0) == 'admin' && arg(1) == 'build' && arg(2) == 'share') {
      $path = drupal_get_path('module', 'share');
      require_once("$path/share_admin.inc");
    }
    if (arg(3) == 'share' || arg(3) == 'sharethis') {
      switch (arg(3)) {
        case 'share':
          $title = t('Share');
          break;
        case 'sharethis':
          $title = t('ShareThis');
          break;
      }
      $items[] = array(
        'path' => 'admin/build/share/'. arg(3) .'/'. arg(4) .'/edit',
        'title' => $title,
        'callback' => 'drupal_get_form',
        'callback arguments' => array('share_admin_popups_'. arg(3) .'_form', arg(4)),
        'type' => MENU_CALLBACK
      );
      if (arg(2) == 'share' && is_numeric(arg(4)) && arg(5) == 'delete') {
        $share = share_popup_load(arg(4), arg(3));
        $items[] = array(
          'path' => 'admin/build/share/'. arg(3) .'/'. arg(4) .'/delete',
          'title' => $title,
          'callback' => 'drupal_get_form',
          'callback arguments' => array('share_admin_popups_share_delete', $share),
          'type' => MENU_CALLBACK
        );
      }
    }
    if (is_numeric(arg(3))) {
      $items[] = array(
        'path' => 'admin/build/share/'. arg(3) .'/disable',
        'title' => $title,
        'callback' => 'share_admin_popups_status',
        'callback arguments' => array('disable', arg(3)),
        'type' => MENU_CALLBACK
      );
      $items[] = array(
        'path' => 'admin/build/share/'. arg(3) .'/enable',
        'title' => $title,
        'callback' => 'share_admin_popups_status',
        'callback arguments' => array('enable', arg(3)),
        'type' => MENU_CALLBACK
      );
    }
    if (is_numeric($arg1 = arg(1))) {
      $items[] = array(
        'path' => 'share',
        'title' => t("Share"),
        'description' => t("Share this page"),
        'callback' => 'share_page',
        'callback arguments' => array($arg1),
        'type' => MENU_CALLBACK,
        'access' => node_access('view', node_load($arg1))
      );
    }
  }
  return $items;
}

/**
 * Implementation of hook_link().
 */
function share_link($type, $node = NULL, $teaser = FALSE) {
  $links = array();

  if ($popups = share_get_popups('links', $node->type)) {
    $settings = array();
    foreach ($popups as $popup) {
      $share = share_popup_load($popup->share_id, $popup->type);
      if (!share_visible($share->view, $teaser)) {
        continue;
      }
      switch ($share->type) {
        case 'share':
          if (user_access('use share')) {
            $links['share_'. $popup->share_id .'_'. $node->nid] = array(
              'title' => $share->name,
              'href' => 'share/'. $node->nid,
              'attributes' => array('id' => 'share-'. $share->share_id .'-'. $node->nid, 'class' => 'share-link')
            );
            $settings[] = array(
              'nid' => $node->nid,
              'shareID' => $popup->share_id,
              'popup' => $share->render($node, 'popup')
            );
          }
          break;
        case 'sharethis':
          if (user_access('use sharethis')) {
            $links['share_'. $popup->share_id .'_'. $node->nid] = array(
              'title' => $share->render($node),
              'html' => TRUE
            );
          }
          break;
      }
    }
    if (!empty($settings)) {
      drupal_add_js(array('share' => $settings), 'setting');
      share_include_js(TRUE);
      share_include_css();
    }
  }

  return $links;
}

function share_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  switch ($op) {
    case 'view':
      if ($popups = share_get_popups('nodes', $node->type)) {
        $settings = array();
        foreach ($popups as $popup) {
          $share = share_popup_load($popup->share_id, $popup->type);
          if (!share_visible($share->view, $a3)) {
            continue;
          }
          switch ($share->type) {
            case 'share':
              if (user_access('use share')) {
                $links['share_'. $popup->share_id .'_'. $node->nid] = array(
                  'title' => $share->name,
                  'href' => 'share/'. $node->nid,
                  'attributes' => array('id' => 'share-'. $share->share_id .'-'. $node->nid, 'class' => 'share-link')
                );
                $settings[] = array(
                  'nid' => $node->nid,
                  'shareID' => $popup->share_id,
                  'popup' => $share->render($node, 'popup')
                );
              }
              break;
            case 'sharethis':
              if (user_access('use sharethis')) {
                $node->content['share_'. $popup->share_id .'_'. $node->nid] = array(
                  '#value' => $share->render($node),
                  '#weight' => 10,
                );
              }
              break;
          }
        }
        if (!empty($settings)) {
          drupal_add_js(array('share' => $settings), 'setting');
          share_include_js(TRUE);
          share_include_css();
        }
      }
      break;
  }
}

/*******************************************************************************
 * Callback Functions, Forms, and Tables
 ******************************************************************************/


/*******************************************************************************
 * Module and Helper Functions
 ******************************************************************************/

function share_popup_load($share_id, $type = NULL) {
  static $shares = array();

  if ($shares[$share_id]) {
    return $shares[$share_id];
  }

  if (!$type) {
    $type = db_result(db_query("SELECT `type` FROM {share} WHERE `share_id` = %d", $share_id));
  }
  switch ($type) {
    case 'share':
      $share = new share_share;
      $share->load_popup($share_id, 'share');
      $share->load_tabs();
      $shares[$share_id] = $share;
      break;
    case 'sharethis':
      $share = new share_sharethis;
      $share->load_popup($share_id, 'sharethis');
      $shares[$share_id] = $share;
      break;
  }
  return $shares[$share_id];
}

function share_popup_new($type, $args) {
  $share_id = db_next_id('{share}_share_id');

  $node_types = array_filter($args['node_types'], 'share_array_values');
  db_query("INSERT INTO {share} (`share_id`, `type`, `label`, `node_types`, `category_terms`, `where`, `view`, `status`) VALUES (%d, '%s', '%s', '%s', '%s', '%s', %d, %d)",
    $share_id, $args['type'], $args['label'], serialize($node_types), serialize($args['category_terms']), $args['where'], $args['view'], $args['status']);

  switch ($type) {
    case 'share':
      db_query("INSERT INTO {share_share} (`share_id`, `name`, `effects`) VALUES (%d, '%s', %d)",
        $share_id, $args['link_name'], $args['effects']);
      foreach (module_implements('share_info') as $module) {
        db_query("INSERT INTO {share_tabs} (`share_id`, `id`, `title`, `enabled`, `weight`, `module`) VALUES (%d, '%s', '%s', %d, %d, '%s')",
          $share_id, $args[$module .'_id'], $args[$module .'_title'], $args[$module .'_enabled'], $args[$module .'_weight'], $args[$module .'_module']);

        $args['share_id'] = $share_id;
        $func = $module .'_share_tab';
        $func('insert', $args);
      }
      break;
    case 'sharethis':
      $services = empty($args['services_order']) ? $args['services'] : explode(',', $args['services_order']);
      db_query("INSERT INTO {share_sharethis} (`share_id`, `icon`, `buttonText`, `popup`, `offsettop`, `offsetleft`, `onclick`) VALUES (%d, '%s', '%s', %d, %d, %d, '%s')",
        $share_id, $args['icon'], $args['button_text'], $args['popup'], $args['top'], $args['left'], $args['onclick']);
      variable_set('share_sharethis_tabs', $args['tabs']);
      variable_set('share_sharethis_services', $services);
      variable_set('share_sharethis_publisher', $args['publisher']);
      variable_set('share_sharethis_code', $args['code']);
      break;
  }
  return $share_id;
}

function share_popup_save($type, $args) {
  $node_types = array_filter($args['node_types'], 'share_array_values');
  db_query("UPDATE {share} SET `type` = '%s', `label` = '%s', `node_types` = '%s', `category_terms` = '%s', `where` = '%s', `view` = %d, `status` = %d WHERE `share_id` = '%s'",
    $args['type'], $args['label'], serialize($node_types), serialize($args['category_terms']), $args['where'], $args['view'], $args['status'], $args['share_id']);

  switch ($type) {
    case 'share':
      db_query("UPDATE {share_share} SET `name` = '%s', `effects` = %d WHERE `share_id` = %d",
        $args['link_name'], $args['effects'], $args['share_id']);
      foreach (module_implements('share_info') as $module) {
        db_query("UPDATE {share_tabs} SET `title` = '%s', `enabled` = %d, `weight` = %d, `module` = '%s' WHERE `share_id` = %d AND `id` = '%s'",
          $args[$module .'_title'], $args[$module .'_enabled'], $args[$module .'_weight'], $args[$module .'_module'], $args['share_id'], $args[$module .'_id']);
        if (!db_affected_rows()) {
          db_query("INSERT INTO {share_tabs} (`share_id`, `id`, `title`, `enabled`, `weight`, `module`) VALUES (%d, '%s', '%s', %d, %d, '%s')",
            $args['share_id'], $args[$module .'_id'], $args[$module .'_title'], $args[$module .'_enabled'], $args[$module .'_weight'], $args[$module .'_module']);
        }

        $func = $module .'_share_tab';
        $func('update', $args);
      }
      break;
    case 'sharethis':
      $services = empty($args['services_order']) ? $args['services'] : explode(',', $args['services_order']);
      db_query("UPDATE {share_sharethis} SET `icon` = '%s', `buttonText` = '%s', `popup` = %d, `offsettop` = %d, `offsetleft` = %d, `onclick` = '%s' WHERE `share_id` = %d",
        $args['icon'], $args['button_text'], $args['popup'], $args['top'], $args['left'], $args['onclick'], $args['share_id']);
      variable_set('share_sharethis_tabs', $args['tabs']);
      variable_set('share_sharethis_services', $services);
      variable_set('share_sharethis_publisher', $args['publisher']);
      variable_set('share_sharethis_code', $args['code']);
      break;
  }
}

function share_popup_delete($share_id, $type = NULL) {
  if ($type) {
    switch ($type) {
      case 'share':
        db_query("DELETE FROM {share_share} WHERE `share_id` = %d", $share_id);
        db_query("DELETE FROM {share_tabs} WHERE `share_id` = %d", $share_id);
        break;
      case 'sharethis':
        db_query("DELETE FROM {share_sharethis} WHERE `share_id` = %d", $share_id);
        break;
    }
  } else {
    db_query("DELETE FROM {share_share} WHERE `share_id` = %d", $share_id);
    db_query("DELETE FROM {share_tabs} WHERE `share_id` = %d", $share_id);
    db_query("DELETE FROM {share_sharethis} WHERE `share_id` = %d", $share_id);
  }
  db_query("DELETE FROM {share} WHERE `share_id` = %d", $share_id);
}

function share_add_share_access() {
  if (!user_access('administer share')) {
    return FALSE;
  }

  $tabs = module_invoke_all('share_info');
  if (empty($tabs)) {
    return FALSE;
  }
  return TRUE;
}

function share_get_popups($where = NULL, $node_type = NULL, $share_type = NULL) {
  static $share_popups = array();

  if (!empty($share_popups)) {
    if ($where) {
      if ($node_type) {
        if ($share_type) {
          $return = array_merge((array)$share_popups[$where][$node_type][$share_type], $share_popups[$where]['all'][$share_type]);
          return $return;
        }
        $share = array_merge((array)$share_popups[$where][$node_type]['share'], (array)$share_popups[$where]['all']['share']);
        $sharethis = array_merge((array)$share_popups[$where][$node_type]['sharethis'], (array)$share_popups[$where]['all']['sharethis']);
        return array_merge($share, $sharethis);
      } else {
        return $share_popups[$where];
      }
    }
    return $share_popups;
  }

  $result = db_query("SELECT * FROM {share} WHERE `status` = %d ORDER BY type", TRUE);
  while ($data = db_fetch_object($result)) {
    $share = drupal_clone($data);
    $share->node_types = unserialize($share->node_types);
    $share->category_terms = unserialize($share->category_terms);
    if (empty($share->node_types)) {
      $share_popups[$data->where]['all'][$share->type][] = $share;
    } else {
      foreach ($share->node_types as $value) {
        $share_popups[$data->where][$value][$share->type][] = $share;
      }
    }
  }

  if ($where) {
    if ($node_type) {
      if ($share_type) {
        $return = array_merge((array)$share_popups[$where][$node_type][$share_type], $share_popups[$where]['all'][$share_type]);
        return $return;
      }
      $share = array_merge((array)$share_popups[$where][$node_type]['share'], (array)$share_popups[$where]['all']['share']);
      $sharethis = array_merge((array)$share_popups[$where][$node_type]['sharethis'], (array)$share_popups[$where]['all']['sharethis']);
      return array_merge($share, $sharethis);
    } else {
      return $share_popups[$where];
    }
  }

  return $share_popups;
}

function share_include_js($link = FALSE) {
  static $share = FALSE;
  static $share_link = FALSE;

  if ($link) {
    if ($share_link == FALSE) {
      drupal_add_js(drupal_get_path('module', 'share') .'/js/share_link.js');
      $share_link = TRUE;
    }
  }
  if ($share == FALSE) {
    drupal_add_js(drupal_get_path('module', 'share') .'/js/share.js');
    $share = TRUE;
  }
}

function share_include_css() {
  static $share = FALSE;

  if ($share == FALSE) {
    drupal_add_css(drupal_get_path('module', 'share') .'/css/share.css');
    $share = TRUE;
  }
}

function share_visible($view, $teaser) {
  switch ($view) {
    case 0:
      if ($teaser) {
        return TRUE;
      }
      break;
    case 1:
      if (!$teaser) {
        return TRUE;
      }
      break;
    case 2:
      return TRUE;
      break;
  }
  return FALSE;
}

function share_array_values($var) {
  return ($var);
}

/*******************************************************************************
 * Theme Functions
 ******************************************************************************/

function theme_share_popup_tabs($tabs, $nid) {
  $output = '<ul class="share-menu">';
  foreach ($tabs as $value) {
    if ($output == '<ul class="share-menu">') {
      $output.= '<li class="share-'. $value['id'] .'-'. $nid .'"><a href="" class="share-tab-'. $value['id'] .' selected"><span>'. $value['name'] .'</span></a></li>';
    } else {
      $output.= '<li class="share-'. $value['id'] .'-'. $nid .'"><a href="" class="share-tab-'. $value['id'] .'"><span>'. $value['name'] .'</span></a></li>';
    }
  }
  $output.= '</ul>';
  return $output;
}

function theme_share_popup_content($content, $nid) {
  $output = '';
  foreach ($content as $value) {
    if ($output == '') {
      $output.= '<div class="share-'. $value['id'] .' share-'. $value['id'] .'-'. $nid .'">'. $value['content'] .'</div>';
    } else {
      $output.= '<div class="share-'. $value['id'] .' share-'. $value['id'] .'-'. $nid .'" style="display: none;">'. $value['content'] .'</div>';
    }
  }
  return $output;
}

function theme_share_popup($data) {
  $output = '<div class="share-popup" style="display: none;">';
  $output.= '<div class="share-header">'. l(t('Close'), '', array('class' => 'share-close')) . $data['tabs'] .'</div>';
  $output.= '<div class="share-content">'. $data['content'] .'</div>';
  $output.= '</div>';
  return $output;
}