<?php

require_once('opengraph_meta.common.inc');


define('OPENGRAPH_META_MENU_ADMIN_D7','admin/config/content/opengraph_meta');
define('OPENGRAPH_META_MENU_ADMIN_D6','admin/settings/opengraph_meta');


/**
 * Implementation of hook_menu.
 */
function opengraph_meta_menu() {
  $admin_access = array(OPENGRAPH_META_PERM_ADMIN);

  $menupath = (OPENGRAPH_META_DRUPAL_VERSION == 6) ? OPENGRAPH_META_MENU_ADMIN_D6 : OPENGRAPH_META_MENU_ADMIN_D7;

  $items[$menupath] = array(
    'title' => 'Open Graph meta tags',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('opengraph_meta_settings_form'),
    'description' => 'Configure meta tags for Facebook sharing.',
    'access arguments' => $admin_access,
    'file' => 'opengraph_meta.admin.inc',
    'menu_name' => 'management',
  );

  if (6 == OPENGRAPH_META_DRUPAL_VERSION) {
    $items[$menupath]['type'] = MENU_NORMAL_ITEM;
    $items[rtrim($menupath,'/').'/settings'] = array(
      'title' => 'Settings',
      'access arguments' => $admin_access,
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => -1,
      'file' => 'opengraph_meta.admin.inc',
    );
  }

  return $items;
}


/**
 * Implementation of hook_form_alter.
 */
function opengraph_meta_form_alter(&$form, $form_state, $form_id) {
  // if editing a node
  if ('node_form' == stristr($form_id, 'node_form')) {

    $node = $form['#node'];
    // check that tags are enabled for this node type and that user has permission to edit them
    if (!OpenGraphMeta::instance()->tags_are_enabled_for_content_type($node->type) || !user_access(OPENGRAPH_META_PERM_EDIT))
      return;

    // add meta tags editing for making it easier to share on Facebook
    $form['opengraph_meta'] = array(
      '#type' => 'fieldset',
      '#title' => t('Open Graph meta tags (e.g. for Facebook sharing)'),
      '#description' => t('Here you can specify the exact title and summary text for this node as it will appear when shared on e.g. Facebook'),
      '#tree' => TRUE,
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#weight' => 100,
      OpenGraphMeta::TITLE => array(
        '#title' => t('Title'),
        '#type' => 'textfield',
        '#maxlength' => 255,
        '#default_value' => !empty($node->opengraph_meta) ? $node->opengraph_meta[OpenGraphMeta::TITLE] : '',
        '#description' => t('The title of the node. If left blank then the node title will be used.'),
      ),
      OpenGraphMeta::DESCRIPTION => array(
        '#title' => t('Summary'),
        '#type' => 'textarea',
        '#default_value' => !empty($node->opengraph_meta) ? $node->opengraph_meta[OpenGraphMeta::DESCRIPTION] : '',
        '#description' => t('The summary of the node. If left blank then the first 200 characters of the node body text will be used.'),
      ),
      OpenGraphMeta::TYPE => array(
        '#title' => t('Type'),
        '#type' => 'select',
        '#options' => OpenGraphMeta::instance()->get_all_og_types_for_select_field(),
        '#default_value' => !empty($node->opengraph_meta) ? $node->opengraph_meta[OpenGraphMeta::TYPE] : '',
        '#description' => t('The type of the node. if left unset then the value set for the %type content type will be used: "@setting"',array('%type' => $node->type, '@setting' => variable_get(OPENGRAPH_META_VAR_CONTENT_TYPE_.$node->type, ''))),
      ),
    );

    // Location stuff
    $form['opengraph_meta']['location'] = array(
      '#type' => 'fieldset',
      '#title' => t('Open Graph Location tags'),
      '#description' => t('Here you can specify the location information.'),
      '#tree' => TRUE,
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#weight' => 100,
    );
    $form['opengraph_meta']['location'] = array_merge($form['opengraph_meta']['location'], _opengraph_meta_location_form_fields($node));

    // Contact stuff
    $form['opengraph_meta']['contact'] = array(
      '#type' => 'fieldset',
      '#title' => t('Open Graph Contact tags'),
      '#description' => t('Here you can specify the contact information.'),
      '#tree' => TRUE,
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      '#weight' => 100,
    );
    $form['opengraph_meta']['contact'] = array_merge($form['opengraph_meta']['contact'], _opengraph_meta_contact_form_fields($node));

    // if we have images in this node then show thumbnail selector
    $images = OpenGraphMeta::instance()->harvest_images_from_node($node);
    if (!empty($images)) {
      $image_selector_options = array();
      foreach ($images as $image) {
        $image_selector_options[$image['url']] = OpenGraphMetaDrupalLayer::theme_selector_image($image);
      }
      $form['opengraph_meta'][OpenGraphMeta::IMAGE] = array(
        '#title' => t('Thumbnail image'),
        '#type' => 'radios',
        '#default_value' => !empty($node->opengraph_meta) ? $node->opengraph_meta[OpenGraphMeta::IMAGE] : '',
        '#description' => t('The thumbnail image that will get shown in e.g. a Facebook preview. If left unset then then the first available image will be used. If none available then the global fallback image will be used.'),
        '#options' => $image_selector_options,
        '#attributes' => array('class' => array('opengraph-thumbs-wrapper','clearfix')),
      );
    }
  }
}


function _opengraph_meta_location_form_fields($node = NULL) {
  $ret = array();
  $fields = array(
    OpenGraphMeta::LATITUDE => array('Latitude', 'Geographical latitude as a decimal number.'),
    OpenGraphMeta::LONGITUDE => array('Longitude', 'Geographical longitude as a decimal number.'),
    OpenGraphMeta::STREET_ADDRESS => array('Street address', 'Local street address.'),
    OpenGraphMeta::LOCALITY => array('Locality', 'E.g. town or city.'),
    OpenGraphMeta::REGION => array('Region', 'Region within country, e.g. a county.'),
    OpenGraphMeta::POST_CODE => array('Post code', 'Postal code.'),
    OpenGraphMeta::COUNTRY_NAME => array('Country', 'Full country name.'),
  );

  $defaults = OpenGraphMeta::instance()->get_og_optional_tag_defaults($node);

  foreach ($fields as $f => $i) {
    $default_value = '';
    if (!empty($node->opengraph_meta) && !empty($node->opengraph_meta[$f])) {
      $default_value = $node->opengraph_meta[$f];
    }

    $ret[$f] = array(
      '#title' => t($i[0]),
      '#type' => 'textfield',
      '#maxlength' => 255,
      '#default_value' =>  $default_value,
      '#description' => t($i[1]),
    );
    // global fallback value?
    if (!empty($node) && isset($node->nid) && !empty($defaults[$f])) {
      $ret[$f]['#description'] .= t(' If left unset then the global fallback value will be used: "@s"',array('@s' => $defaults[$f]));
    }
  }
  return $ret;
}


function _opengraph_meta_contact_form_fields($node = NULL) {
  $ret = array();
  $fields = array(
    OpenGraphMeta::EMAIL => array('Email', 'Email address.'),
    OpenGraphMeta::PHONE_NUMBER => array('Phone number', 'Phone number.'),
    OpenGraphMeta::FAX_NUMBER => array('Fax number', 'Fax number.'),
  );

  $defaults = OpenGraphMeta::instance()->get_og_optional_tag_defaults($node);

  foreach ($fields as $f => $i) {
    $default_value = '';
    if (!empty($node->opengraph_meta) && !empty($node->opengraph_meta[$f])) {
      $default_value = $node->opengraph_meta[$f];
    }

    $ret[$f] = array(
      '#title' => t($i[0]),
      '#type' => 'textfield',
      '#maxlength' => 255,
      '#default_value' => $default_value,
      '#description' => t($i[1]),
    );
    // global fallback value?
    if (!empty($node) && isset($node->nid) && !empty($defaults[$f])) {
      $ret[$f]['#description'] .= t(' If left unset then the global fallback value will be used: "@s"',array('@s' => $defaults[$f]));
    }
  }
  return $ret;
}


if (6 == OPENGRAPH_META_DRUPAL_VERSION) {
  require_once 'opengraph_meta.drupal6-hooks.inc';
} else {
  require_once 'opengraph_meta.drupal7-hooks.inc';
}