<?php
// $Id$

/**
 * @file
 * Adds Facebook's "Like" button to each selected node type.
 */

/**
 * Implementation of hook_menu().
 */
function fblikebutton_menu() {
  $items['admin/config/fblikebutton'] = array(
    'title' => 'FB Like settings',
    'description' => 'Configure FB Like Button',
    'page callback' => 'system_admin_menu_block_page',
    'access arguments' => array('administer fblikebutton'),
    'position' => 'right',
    'weight' => -20,
    'type' => MENU_NORMAL_ITEM,
    'file' => 'system.admin.inc',
    'file path' => drupal_get_path('module', 'system'),
  );
  $items['admin/config/fblikebutton/general'] = array(
    'title' => 'FB Like settings',
    'description' => 'Configure which the button should appear on.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('fblikebutton_admin_settings'),
    'access arguments' => array('administer fblikebutton'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'fblikebutton.admin.inc',
    'weight' => 0,
  );
  $items['admin/config/fblikebutton/block'] = array(
    'title' => 'FB Like block settings',
    'description' => 'Configure which the block should appear on.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('fblikebutton_block_settings'),
    'access arguments' => array('administer fblikebutton block'),
    'type' => MENU_NORMAL_ITEM,
    'file' => 'fblikebutton.admin.inc',
    'weight' => 1,
  );
  return $items;
}

/**
 * Implementation of hook_permission()
 */
function fblikebutton_permission() {
  return array(
    'administer fblikebutton' => array(
      'title' => t('Administer FB Like button'),
      'description' => t('Perform administration tasks for FB Like button')
    ),
    'administer fblikebutton block' => array(
      'title' => t('Administer FB Like button block'),
      'description' => t('Perform administration tasks for FB Like button block')
    ),
    'access fblikebutton' => array(
      'title' => t('Access FB Like button'),
    ),
  );
}

/**
 * Implementation of hook_node_view()
 */
function fblikebutton_node_view($node, $view_mode) {
  $types = variable_get('fblikebutton_node_types', array());
  $full = ($view_mode == 'full') ? TRUE : FALSE;
  $show = ( ! empty($types[$node->type]) &&
          $full && user_access('access fblikebutton'));
  if ($show) {
    $url = $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    $http = ( ! empty($_SERVER['HTTPS'])) ? 'https://' : 'http://';
    $addr = $http . $url;
    $conf = array(
      'layout' => variable_get('fblikebutton_layout', "standard"),
      'action' => variable_get('fblikebutton_action', "like"),
      'color_scheme' => variable_get('fblikebutton_color_scheme', "light"),
      'show_faces' => variable_get('fblikebutton_show_faces', "false"),
      'font' => variable_get('fblikebutton_font', "arial"),
    );
    $node->content['fblikebutton_field'] = array(
      '#markup' => _fblikebutton_field($addr, $conf),
    );
  }
}

/**
 * Implementation of hook_block_info()
 */
function fblikebutton_block_info() {
  $blocks['fblikebutton_block'] = array(
    'info' => t('FB Like button'),
  );
  return $blocks;
}

/**
 * Implementation of hook_block_configure()
 */
function fblikebutton_block_configure($delta = '') {
  global $base_url;
  $form = array();
  if ($delta == 'fblikebutton_block') {
    $form['fblikebutton_block_url'] = array(
      '#title' => t('Homepage URL'),
      '#type' => 'textfield',
      '#default_value' => variable_get('fblikebutton_block_url', $base_url),
      '#description' => t('URL of your homepage to like'),
    );
    $form['block'] = array(
      '#type' => 'fieldset',
      '#collapsible' => false,
      '#collapsed' => false,
      '#title' => t('Options'),
      '#description' => '',
    );
    $form['block']['fblikebutton_bl_layout'] = array(
      '#type' => 'select',
      '#title' => t('Layout style'),
      '#options' => array('standard' => t('Standard'), 'box_count' => t('Box Count'), 'button_count' => t('Button Count')),
      '#default_value' => variable_get('fblikebutton_bl_layout', 'standard'),
      '#description' => t('Determines the size and amount of social context next to the button'),
    );
    $form['block']['fblikebutton_bl_show_faces'] = array(
      '#type' => 'select',
      '#title' => t('Display faces in the box'),
      '#options' => array('show' => t('Show faces'), 'hide' => t('Do not show faces')),
      '#default_value' => variable_get('fblikebutton_bl_show_faces', 'show'),
      '#description' => t('Show profile pictures below the button. Only work on Standard layout'),
    );
    $form['block']['fblikebutton_bl_action'] = array(
      '#type' => 'select',
      '#title' => t('Verb to display'),
      '#options' => array('like' => t('Like'), 'recommend' => t('Recommend')),
      '#default_value' => variable_get('fblikebutton_bl_action', 'like'),
      '#description' => t('The verb to display in the button.'),
    );
    $form['block']['fblikebutton_bl_font'] = array(
	  '#type' => 'select',
	  '#title' => t('Font'),
	  '#options' => array('arial' => 'Arial',
	              'lucida+grande' => 'Lucida Grande',
	              'segoe+ui' => 'Segoe UI',
	              'tahoma' => 'Tahoma',
	              'trebuchet+ms' => 'Trebuchet MS',
	              'verdana' => 'Verdana'),
	  '#default_value' => variable_get('fblikebutton_bl_font', 'arial'),
	  '#description' => t('The font to display in the button'),
    );
    $form['block']['fblikebutton_bl_color_scheme'] = array(
	  '#type' => 'select',
	  '#title' => t('Color scheme'),
	  '#options' => array('light' => t('Light'), 'dark' => t('Dark')),
	  '#default_value' => variable_get('fblikebutton_bl_color_scheme', 'light'),
	  '#description' => t('The color scheme of box environtment'),
    );
  }
  return $form;
}

/**
 * Implementation of hook_block_save()
 */
function fblikebutton_block_save($delta = '', $edit = array()) {
  if ($delta == 'fblikebutton_block') {
    variable_set('fblikebutton_bl_layout', $edit['fblikebutton_bl_layout']);
    variable_set('fblikebutton_bl_layout', $edit['fblikebutton_bl_layout']);
    variable_set('fblikebutton_bl_show_faces', $edit['fblikebutton_bl_show_faces']);
    variable_set('fblikebutton_bl_action', $edit['fblikebutton_bl_action']);
    variable_set('fblikebutton_bl_font', $edit['fblikebutton_bl_font']);
    variable_set('fblikebutton_bl_color_scheme', $edit['fblikebutton_bl_color_scheme']);
  }
}

/**
 * Implementation of hook_block_view()
 */
function fblikebutton_block_view($delta = '') {
  global $base_url;
  $block = array();
  switch ($delta) {
    case 'fblikebutton_block':
    default:
      $addr = variable_get('fblikebutton_block_url', $base_url);
      $conf = array(
        'layout' => variable_get('fblikebutton_bl_layout', "standard"),
        'action' => variable_get('fblikebutton_bl_action', "like"),
        'color_scheme' => variable_get('fblikebutton_bl_color_scheme', "light"),
        'show_faces' => variable_get('fblikebutton_bl_show_faces', "false"),
        'font' => variable_get('fblikebutton_bl_font', "arial"),
      );
      $block['content'] = _fblikebutton_field($addr, $conf);
  }
  return $block;
}

function _fblikebutton_field($addr, $conf) {
  $addr = urlencode($addr);
  $width = "100%";
  $layout = $conf['layout'];
  $action = $conf['action'];
  $colorscheme = $conf['color_scheme'];
  $show_faces = $conf['show_faces'];
  $font = $conf['font'];
  switch ($layout) {
    case "box_count":
	  $height = 65;
    case "button_count":
      $height = 21;
    case "standard":
    default:
      $height = $show_faces == "false" ? 35 : 80;
  }
  $height = 60;
  
  $params = "href=$addr&layout=$layout&show_faces=false&width&font=$font&height=$height&action=$action&colorscheme=$colorscheme";
  $src = htmlentities($params);
  $output = "<iframe src=\"http://www.facebook.com/plugins/like.php?$src\" scrolling=\"no\" frameborder=\"0\" style=\"border:none; overflow:hidden; width: ".$width."; height: ".$height."px; allowTransparency=\"true\"></iframe>";
  return $output;
}