addtocalendar.module in Add To Calendar Button (AddEvent.com) 7

File

addtocalendar.module

<?php

/**
 * @file
 */

/**
 * Implements hook_help().
 */
function addtocalendar_help($path, $arg) {
  switch ($path) {
    case 'admin/help#addtocalendar':
      $output = file_get_contents(drupal_get_path('module', 'addtocalendar') . '/README.md');
      return $output;
  }
}

/**
 * Implements hook_field_formatter_info_alter().
 */
function addtocalendar_field_formatter_info_alter(&$info) {

  // Add a setting to a formatter type.
  if (isset($info['date_default'])) {
    $info['date_default']['settings'] += array(
      'addtocalendar_show' => '',
      'addtocalendar_settings' => '',
    );
  }
}

/**
 * Implements hook_field_formatter_settings_form_alter().
 */
function addtocalendar_field_formatter_settings_form_alter(&$settings_form, $context) {
  if ($context['instance']['display'][$context['view_mode']]['type'] == 'date_default') {
    $display = $context['instance']['display'][$context['view_mode']];
    $settings = $display['settings'];
    $field_list = field_info_instances($context['form']['#entity_type'], $context['form']['#bundle']);
    $settings_form['addtocalendar_show'] = array(
      '#type' => 'checkbox',
      '#title' => t('Show Add to Calendar'),
      '#default_value' => $settings['addtocalendar_show'],
    );
    $settings_form['addtocalendar_settings'] = array(
      '#type' => 'fieldset',
      '#title' => t('Add to Calendar Settings'),
      '#states' => array(
        "visible" => array(
          "input[name*='addtocalendar_show']" => array(
            "checked" => TRUE,
          ),
        ),
      ),
    );
    $settings_form['addtocalendar_settings']['style'] = array(
      '#type' => 'select',
      '#title' => t('Select Style'),
      '#options' => array(
        0 => t('No Styling'),
        'blue' => t('Blue'),
        'glow_orange' => t('Glow Orange'),
      ),
      '#default_value' => !empty($settings['addtocalendar_settings']['style']) ? $settings['addtocalendar_settings']['style'] : 'blue',
    );
    $settings_form['addtocalendar_settings']['display_text'] = array(
      '#type' => 'textfield',
      '#title' => t('Display Text'),
      '#default_value' => !empty($settings['addtocalendar_settings']['display_text']) ? $settings['addtocalendar_settings']['display_text'] : t('Add to Calender'),
    );
    $info = array(
      'atc_title' => t('Title'),
      'atc_description' => t('Description'),
      'atc_location' => t('Location'),
      'atc_organizer' => t('Organizer'),
      'atc_organizer_email' => t('Organizer email'),
      'atc_date_end' => t('End Date'),
    );
    $field_options = array();
    foreach ($field_list as $id => $field_i) {
      $field_options[$id] = $field_i['label'];
    }
    $field_options = array_merge(array(
      'token' => t('Use Token/Static Content'),
    ), array(
      'title' => t('Title'),
    ), $field_options);
    $info = array(
      'atc_title' => t('Title'),
      'atc_description' => t('Description'),
      'atc_location' => t('Location'),
      'atc_organizer' => t('Organizer'),
      'atc_organizer_email' => t('Organizer email'),
      'atc_date_end' => t('End Date'),
    );
    foreach ($info as $id => $label) {
      $settings_form['addtocalendar_settings'][$id]['field'] = array(
        '#type' => 'select',
        '#title' => $label . t(': field'),
        '#options' => $field_options,
        '#description' => t('Select field to be used as @label for calendar events', array(
          '@label' => $label,
        )),
        '#default_value' => !empty($settings['addtocalendar_settings'][$id]['field']) ? $settings['addtocalendar_settings'][$id]['field'] : '',
      );
      $settings_form['addtocalendar_settings'][$id]['tokenized'] = array(
        '#type' => 'textfield',
        '#title' => $label . t(': Static/Tokenized Content'),
        '#default_value' => !empty($settings['addtocalendar_settings'][$id]['tokenized']) ? $settings['addtocalendar_settings'][$id]['tokenized'] : '',
      );
    }
    $settings_form['addtocalendar_settings']['atc_privacy'] = array(
      '#type' => 'select',
      '#title' => t('Privacy'),
      '#options' => array(
        'public' => t('Public'),
        'private' => t('Private'),
      ),
      '#description' => t('Use public for free access to event information from any places. User private if the event is closed to public access.'),
      '#default_value' => !empty($settings['addtocalendar_settings']['atc_privacy']) ? $settings['addtocalendar_settings']['atc_privacy'] : '',
    );
    $settings_form['addtocalendar_settings']['data_secure'] = array(
      '#type' => 'select',
      '#title' => t('Security level'),
      '#options' => array(
        'auto' => t('Auto'),
        'true' => t('Use https only'),
        'false' => t('Use http only'),
      ),
      '#default_value' => !empty($settings['addtocalendar_settings']['data_secure']) ? $settings['addtocalendar_settings']['data_secure'] : '',
    );
    $settings_form['addtocalendar_settings']['data_calendars'] = array(
      '#type' => 'checkboxes',
      '#options' => array(
        'iCalendar' => t('iCalendar'),
        'Google Calendar' => t('Google Calendar'),
        'Outlook' => t('Outlook'),
        'Outlook Online' => t('Outlook Online'),
        'Yahoo! Calendar' => t('Yahoo! Calendar'),
      ),
      '#default_value' => !empty($settings['addtocalendar_settings']['data_calendars']) ? $settings['addtocalendar_settings']['data_calendars'] : '',
      '#title' => t('List of calendars to show in button list.'),
    );
  }
}

/**
 * Implements hook_field_formatter_settings_summary_alter().
 */
function addtocalendar_field_formatter_settings_summary_alter(&$summary, $context) {

  // Append a message to the summary when foo_formatter has
  // mymodule_extra_setting set to TRUE for the current view mode.
  if ($context['instance']['display'][$context['view_mode']]['type'] == 'date_default') {
    $display = $context['instance']['display'][$context['view_mode']];
    $settings = $display['settings'];
    if (!empty($summary)) {
      $summary .= '';
    }
    if ($settings['addtocalendar_show']) {
      $summary .= '</br>' . t('Add to calendar is enabled.');
    }
    else {
      $summary .= '</br>' . t('Add to calendar is disabled.');
    }
  }
}

/**
 * Implements hook_preprocess_field().
 */
function addtocalendar_preprocess_field(&$variables) {

  // Provide an extra variable to the field template when the field uses
  // a formatter of type 'foo_formatter'.
  if ($variables['element']['#formatter'] == 'date_default') {
    $entity_type = $variables['element']['#entity_type'];
    $field_name = $variables['element']['#field_name'];
    $bundle = $variables['element']['#bundle'];
    $view_mode = $variables['element']['#view_mode'];
    $entity = $variables['element']['#object'];
    $formatter_settings = field_formatter_settings_get_instance_display_settings($entity_type, $field_name, $bundle, $view_mode);

    // Make the setting available in the field template.
    $variables['addtocalendar_settings'] = $formatter_settings['addtocalendar_settings'];
    if (!empty($variables['addtocalendar_settings'])) {
      $build['addtocalendar'] = array();
      $settings = $variables['addtocalendar_settings'];
      if ($formatter_settings['addtocalendar_show']) {
        $timeZone = date_default_timezone_get();
        $date = date('m/d/Y h:ia', strtotime($entity->{$field_name}['und'][0]['value']));
        $build['addtocalendar']['atc_date_start'] = array(
          '#type' => 'html_tag',
          '#tag' => 'var',
          '#value' => $date,
          '#attributes' => array(
            'class' => 'atc_date_start',
          ),
        );
        $info = array(
          'atc_date_end',
          'atc_title',
          'atc_description',
          'atc_location',
          'atc_organizer',
          'atc_organizer_email',
        );
        foreach ($info as $value) {
          switch ($settings[$value]['field']) {
            case 'token':
              $class_value = $settings[$value]['tokenized'];
              break;
            case 'title':
              $class_value = entity_label($entity_type, $entity);
              break;
            default:
              $field = $settings[$value]['field'];
              $field_data = field_get_items($entity_type, $entity, $field);
              $class_value = $field_data[0]['value'];
              break;
          }
          $build['addtocalendar'][$value] = array(
            '#type' => 'html_tag',
            '#tag' => 'var',
            '#value' => $class_value,
            '#attributes' => array(
              'class' => $value,
            ),
          );
        }

        // Assign end date the value of start date if no date is present.
        $build['addtocalendar']['atc_date_end']['#value'] = !empty($build['addtocalendar']['atc_date_end']['#value']) ? $date = date('m/d/Y g:ia', strtotime($build['addtocalendar']['atc_date_end']['#value'])) : $date;
        $build['addtocalendar']['atc_timezone'] = array(
          '#type' => 'html_tag',
          '#tag' => 'var',
          '#value' => $timeZone,
          '#attributes' => array(
            'class' => 'atc_timezone',
          ),
        );
        $build['addtocalendar']['atc_privacy'] = array(
          '#type' => 'html_tag',
          '#tag' => 'var',
          '#value' => $settings['atc_privacy'],
          '#attributes' => array(
            'class' => 'atc_privacy',
          ),
        );
        $build['addtocalendar'] = array(
          '#type' => 'html_tag',
          '#tag' => 'span',
          '#value' => '<var class="atc_event">' . render($build['addtocalendar']) . '</var>',
          '#attributes' => array(
            'class' => array(
              'addtocalendar',
            ),
          ),
        );
        if ($settings['data_calendars']) {
          $value = '';
          foreach ($settings['data_calendars'] as $key => $set) {
            if ($set) {
              $value .= $key . ', ';
            }
          }
          if ($value) {
            $build['addtocalendar']['#attributes']['data-calendars'] = $value;
          }
        }
        $build['addtocalendar']['#attributes']['data-secure'] = $settings['data_secure'];

        // Styling.
        switch ($settings['style']) {
          case 'blue':
            $style['class'] = 'atc-style-blue';
            drupal_add_js('//addtocalendar.com/atc/1.5/atc.min.js', 'external');
            drupal_add_css('//addtocalendar.com/atc/1.5/atc-style-blue.css', 'external');
            break;
          case 'glow_orange':
            $style['class'] = 'atc-style-glow-orange';
            drupal_add_js('//addtocalendar.com/atc/1.5/atc.min.js', 'external');
            drupal_add_css('//addtocalendar.com/atc/1.5/atc-style-glow-orange.css', 'external');
            break;
          default:
            drupal_add_js('//addtocalendar.com/atc/1.5/atc.min.js', 'external');
            drupal_add_css('//addtocalendar.com/atc/1.5/atc-base.css', 'external');
            break;
        }
        if (!empty($style)) {
          $build['addtocalendar']['#attributes']['class'][] = $style['class'];
        }
      }
      $variables['items'][0]['#markup'] .= render($build['addtocalendar']);
      $variables['#attached']['library'][] = drupal_add_css('//addtocalendar.com/atc/1.5/atc-base.css', 'external');
    }
  }
}

Functions

Name	Description
addtocalendar_field_formatter_info_alter	Implements hook_field_formatter_info_alter().
addtocalendar_field_formatter_settings_form_alter	Implements hook_field_formatter_settings_form_alter().
addtocalendar_field_formatter_settings_summary_alter	Implements hook_field_formatter_settings_summary_alter().
addtocalendar_help	Implements hook_help().
addtocalendar_preprocess_field	Implements hook_preprocess_field().