office365_calendar.module

<?php

/**
 * @file
 * Contains office365_calendar.module..
 */

use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\office365_calendar\Office365\CalendarAPI;
use Drupal\profile\Entity\ProfileInterface;
use Drupal\profile\Entity\ProfileType;

/**
 * Implements hook_help().
 */
function office365_calendar_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the office365_calendar module.
    case 'help.page.office365_calendar':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Module provides Office365 calendar API integration for fetching user events to local view. Uses OAuth 2.0 for authentication and FullCalendar.js for display.') . '</p>';
      return $output;

    default:
  }
}

/*
 * Implementation of hook_form_alter()
 */
function office365_calendar_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == "user_form") {
    $form['office365_calendar'] = array(
      '#type' => 'details',
      '#title' => t('Office365 settings'),
      '#open' => TRUE,
      '#weight' => 0,
    );

    $oauth2 = \Drupal::service('office365_oauth2');
    $uid = \Drupal::routeMatch()->getParameter('user')->id();
    if ($oauth2->tokenExists($uid)) {
      $userdata = \Drupal::service('user.data');
      $calendarid = $userdata->get('office365_calendar', $uid, 'calendar');

      $api = new CalendarAPI($oauth2->getAccessToken($uid));
      $calendars = $api->getCalendars();
      foreach ($calendars['value'] as $calendar) {
        $options[$calendar['Id']] = $calendar['Name'];
      }
      $calendarexists = \Drupal::service('user.data')->get('office365_calendar',
        \Drupal::routeMatch()->getParameter('user')->id(),'calendar');
      if (!$calendarexists){
        reset($options);
        \Drupal::service('user.data')->set('office365_calendar', \Drupal::routeMatch()->getParameter('user')->id(),
          'calendar', key($options));
      }
      $form['office365_calendar']['selector'] = array(
        '#type' => 'select',
        '#title' => t('Schedule calendar'),
        '#options' => $options,
        '#size' => 1,
        '#default_value' => $calendarid,
        '#description' => t('Select the desired calendar from your Office365 calendar list that will be shown on your profile page.'),
      );
      $form['actions']['submit']['#submit'][] = 'office365_calendar_select';

      $myinfo = $api->getMe();
      $form['office365_calendar']['disconnect'] = array(
        '#type' => 'button',
        '#name' =>'office365_disconnect',
        '#value' => t('Disconnect Office365 account'),
        '#executes_submit_callback' => TRUE,
        '#submit' => array('office365_calendar_disconnect'),
      );

      $form['office365_calendar']['email'] = array(
        '#markup' => '<br>' . $myinfo['DisplayName'] . ' (' . $myinfo['EmailAddress'] . ')',
      );
    }
    else {
      $form['office365_calendar']['authenticate'] = array(
        '#type' => 'button',
        '#name' => 'office365_authenticate',
        '#value' => t('Connect Office365 account'),
        '#executes_submit_callback' => TRUE,
        '#submit' => array('office365_calendar_authenticate'),
      );
    }
  }
}

function office365_calendar_authenticate($form, FormStateInterface $form_state){
  $form_state->setRedirect('office365_calendar.callback');
}

function office365_calendar_disconnect(){
  \Drupal::service('office365_oauth2')->deleteToken(\Drupal::routeMatch()->getParameter('user')->id());
}

function office365_calendar_select($form, FormStateInterface $form_state){
  \Drupal::service('user.data')->set(
    'office365_calendar',
    \Drupal::routeMatch()->getParameter('user')->id(),
    'calendar',
    $form_state->getValue('selector')
  );
}

/**
 * Implements hook_entity_extra_field_info().
 */
function office365_calendar_entity_extra_field_info() {
  $profile_type = \Drupal::service('config.factory')->get('office365_calendar.settings')->get('profile_type');
  //foreach (ProfileType::loadMultiple() as $bundle) {
    $extra['profile'][$profile_type]['display']['office365_calendar_field'] = array(
      'label' => t('Office365 calendar'),
      'description' => t('A calendar pseudo-field for profile entities'),
      'weight' => 100,
      'visible' => FALSE,
    );
  //}

  return $extra;
}

function office365_calendar_profile_view(array &$build, ProfileInterface $entity, EntityViewDisplayInterface $display, $view_mode) {
  if ($display->getComponent('office365_calendar_field')) {
    $oauth2 = \Drupal::service('office365_oauth2');
    $uid = $entity->getOwnerId();
    if ($oauth2->tokenExists($uid)) {
      $api = new CalendarAPI($oauth2->getAccessToken($uid));
      $userdata = \Drupal::service('user.data');
      $calendar = (string) $userdata->get('office365_calendar', $uid, 'calendar');
      $query = [
        'startdatetime' => '2016-07-01T00:00:00Z',
        'enddatetime' => '2016-08-31T00:00:00Z',
      ];
      $events = $api->getEvents($calendar, $query);
      $jsglobal = [];
      foreach ($events as $event) {
        $jsevent['title'] = $event['Subject'];
        $jsevent['start'] = $event['Start']['DateTime'];
        $jsevent['end'] = $event['End']['DateTime'];
        $jsglobal[] = $jsevent;
      }

      // Array of FullCalendar settings.
      $settings = array(
        'header' => array(
          'left' => 'prev,next today',
          'center' => 'title',
          'right' => 'month,agendaWeek,agendaDay',
        ),
        'defaultDate' => date("Y-m-d"),//'2015-02-12',
        'editable' => FALSE,
        'eventLimit' => TRUE, // allow "more" link when too many events
        'events' => $jsglobal,
      );
      $build['office365_calendar_field'] = array(
        '#theme' => 'fullcalendar_calendar',
        '#calendar_id' => 'fullcalendar',
        '#calendar_settings' => $settings,
      );
    }
  }
}