have this requirement. You should get in touch with your web hosting provider and ask them to update PHP.
Back to Plugins' );
}
}
}
//If any new options have been added between versions, this will update any saved feeds with defaults for new options (shouldn't overwrite anything saved)
function update_settings() {
//If there are some plugin options in the database, but no version info, then this must be an upgrade from version 0.5 or below, so add flag that will provide user with option to clear old transients
if ( get_option( GCE_OPTIONS_NAME ) && ! get_option( 'gce_version' ) )
add_option( 'gce_clear_old_transients', true );
add_option( 'gce_version', GCE_VERSION );
add_option( GCE_OPTIONS_NAME );
add_option( GCE_GENERAL_OPTIONS_NAME );
//Get feed options
$options = get_option( GCE_OPTIONS_NAME );
if ( ! empty( $options ) ) {
foreach ( $options as $key => $saved_feed_options ) {
$defaults = array(
'id' => 1,
'title' => '',
'url' => '',
'retrieve_from' => 'today',
'retrieve_from_value' => 0,
'retrieve_until' => 'any',
'retrieve_until_value' => 0,
'max_events' => 25,
'date_format' => '',
'time_format' => '',
'timezone' => 'default',
'cache_duration' => 43200,
'multiple_day' => 'false',
'display_start' => 'time',
'display_end' => 'time-date',
'display_location' => '',
'display_desc' => '',
'display_link' => 'on',
'display_start_text' => 'Starts:',
'display_end_text' => 'Ends:',
'display_location_text' => 'Location:',
'display_desc_text' => 'Description:',
'display_desc_limit' => '',
'display_link_text' => 'More details',
'display_link_target' => '',
'display_separator' => ', ',
'use_builder' => 'false',
'builder' => ''
);
//If necessary, copy saved behaviour of old show_past_events and day_limit options into the new from / until options
if ( isset( $saved_feed_options['show_past_events'] ) ) {
if ( 'true' == $saved_feed_options['show_past_events'] ) {
$saved_feed_options['retrieve_from'] = 'month-start';
} else {
$saved_feed_options['retrieve_from'] = 'today';
}
}
if ( isset( $saved_feed_options['day_limit'] ) && '' != $saved_feed_options['day_limit'] ) {
$saved_feed_options['retrieve_until'] = 'today';
$saved_feed_options['retrieve_until_value'] = (int) $saved_feed_options['day_limit'] * 86400;
}
//Update old display_start / display_end values
if ( ! isset( $saved_feed_options['display_start'] ) )
$saved_feed_options['display_start'] = 'none';
elseif ( 'on' == $saved_feed_options['display_start'] )
$saved_feed_options['display_start'] = 'time';
if( ! isset( $saved_feed_options['display_end'] ) )
$saved_feed_options['display_end'] = 'none';
elseif ( 'on' == $saved_feed_options['display_end'] )
$saved_feed_options['display_end'] = 'time-date';
//Merge saved options with defaults
foreach ( $saved_feed_options as $option_name => $option ) {
$defaults[$option_name] = $saved_feed_options[$option_name];
}
$options[$key] = $defaults;
}
}
//Save feed options
update_option( GCE_OPTIONS_NAME, $options );
//Get general options
$options = get_option( GCE_GENERAL_OPTIONS_NAME );
$defaults = array(
'stylesheet' => '',
'javascript' => false,
'loading' => 'Loading...',
'error' => 'Events cannot currently be displayed, sorry! Please check back later.',
'fields' => true,
'old_stylesheet' => false
);
$old_stylesheet_option = get_option( 'gce_stylesheet' );
//If old custom stylesheet option was set, add it to general options, then delete old option
if( false !== $old_stylesheet_option ) {
$defaults['stylesheet'] = $old_stylesheet_option;
delete_option( 'gce_stylesheet' );
} elseif ( isset($options['stylesheet'] ) ) {
$defaults['stylesheet'] = $options['stylesheet'];
}
if ( isset($options['javascript'] ) )
$defaults['javascript'] = $options['javascript'];
if ( isset( $options['loading'] ) )
$defaults['loading'] = $options['loading'];
if ( isset($options['error'] ) )
$defaults['error'] = $options['error'];
if ( isset($options['fields'] ) )
$defaults['fields'] = $options['fields'];
if( isset( $options['old_stylesheet'] ) )
$defaults['old_stylesheet'] = $options['old_stylesheet'];
//Save general options
update_option( GCE_GENERAL_OPTIONS_NAME, $defaults );
}
function init_plugin() {
//Load text domain for i18n
load_plugin_textdomain( GCE_TEXT_DOMAIN, false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
}
//Adds 'Settings' link to main WordPress Plugins page
function add_settings_link( $links ) {
array_unshift( $links, '' . __( 'Settings', GCE_TEXT_DOMAIN ) . '' );
return $links;
}
//Setup admin settings page
function setup_admin(){
if ( function_exists( 'add_options_page' ) )
add_options_page( 'Google Calendar Events', 'Google Calendar Events', 'manage_options', basename( __FILE__ ), array( $this, 'admin_page' ) );
}
//Prints admin settings page
function admin_page() {
?>
update_settings();
//If the message about old transients was displayed, check authority and intention, and then either clear transients or clear flag
if ( isset( $_GET['gce_action'] ) && current_user_can( 'manage_options' ) ) {
switch ( $_GET['gce_action'] ) {
case 'clear_old_transients':
check_admin_referer( 'gce_action_clear_old_transients' );
$this->clear_old_transients();
add_settings_error( 'gce_options', 'gce_cleared_old_transients', __( 'Old cached data cleared.', GCE_TEXT_DOMAIN ), 'updated' );
break;
case 'ignore_old_transients':
check_admin_referer( 'gce_action_ignore_old_transients' );
delete_option( 'gce_clear_old_transients' );
}
}
register_setting( 'gce_options', 'gce_options', array( $this, 'validate_feed_options' ) );
register_setting( 'gce_general', 'gce_general', array( $this, 'validate_general_options' ) );
require_once 'admin/add.php';
require_once 'admin/edit.php';
require_once 'admin/delete.php';
require_once 'admin/refresh.php';
}
//Clears any expired transients from the database
function clear_old_transients() {
global $wpdb;
//Retrieve names of all transients
$transients = $wpdb->get_results( "SELECT option_name FROM $wpdb->options WHERE option_name LIKE '%transient%' AND option_name NOT LIKE '%transient_timeout%'" );
if ( ! empty( $transients ) ) {
foreach ( $transients as $transient ) {
//Attempt to retrieve the transient. If it has expired, it will be deleted
get_transient( str_replace( '_transient_', '', $transient->option_name ) );
}
}
//Remove the flag
delete_option( 'gce_clear_old_transients' );
}
//Register the widget
function add_widget() {
require_once 'widget/gce-widget.php';
return register_widget( 'GCE_Widget' );
}
//Check / validate submitted feed options data before being stored
function validate_feed_options( $input ) {
//Get saved options
$options = get_option( GCE_OPTIONS_NAME );
if ( isset( $input['submit_delete'] ) ) {
//If delete button was clicked, delete feed from options array and remove associated transients
unset( $options[$input['id']] );
$this->delete_feed_transients( (int) $input['id'] );
add_settings_error( 'gce_options', 'gce_deleted', __( sprintf('Feed %s deleted.', absint( $input['id'] ) ), GCE_TEXT_DOMAIN ), 'updated' );
} elseif ( isset($input['submit_refresh'] ) ) {
//If refresh button was clicked, delete transients associated with feed
$this->delete_feed_transients( (int) $input['id'] );
add_settings_error( 'gce_options', 'gce_refreshed', __( sprintf('Cached data for feed %s cleared.', absint( $input['id'] ) ), GCE_TEXT_DOMAIN ), 'updated' );
} else {
//Otherwise, validate options and add / update them
//Check id is positive integer
$id = absint( $input['id'] );
//Escape title text
$title = esc_html( $input['title'] );
//Escape feed url
$url = esc_url( $input['url'] );
//Array of valid options for retrieve_from and retrieve_until settings
$valid_retrieve_options = array( 'now', 'today', 'week', 'month-start', 'month-end', 'any', 'date' );
$retrieve_from = 'today';
$retrieve_from_value = 0;
//Ensure retrieve_from is valid
if( in_array( $input['retrieve_from'], $valid_retrieve_options ) ) {
$retrieve_from = $input['retrieve_from'];
$retrieve_from_value = (int) $input['retrieve_from_value'];
}
$retrieve_until = 'any';
$retrieve_until_value = 0;
//Ensure retrieve_until is valid
if ( in_array( $input['retrieve_until'], $valid_retrieve_options ) ) {
$retrieve_until = $input['retrieve_until'];
$retrieve_until_value = (int) $input['retrieve_until_value'];
}
//Check max events is a positive integer. If absint returns 0, reset to default (25)
$max_events = ( 0 == absint($input['max_events'] ) ) ? 25 : absint( $input['max_events'] );
$date_format = wp_filter_kses( $input['date_format'] );
$time_format = wp_filter_kses( $input['time_format'] );
//Escape timezone
$timezone = esc_html( $input['timezone'] );
//Make sure cache duration is a positive integer or 0. If user has typed 0, leave as 0 but if 0 is returned from absint, set to default (43200)
$cache_duration = $input['cache_duration'];
if ( '0' != $cache_duration )
$cache_duration = ( 0 == absint( $cache_duration ) ) ? 43200 : absint( $cache_duration );
$multiple_day = ( isset( $input['multiple_day'] ) ) ? 'true' : 'false';
$display_start = esc_html( $input['display_start'] );
$display_end = esc_html( $input['display_end'] );
//Display options must be 'on' or null
$display_location = ( isset( $input['display_location'] ) ) ? 'on' : null;
$display_desc = ( isset( $input['display_desc'] ) ) ? 'on' : null;
$display_link = ( isset( $input['display_link'] ) ) ? 'on' : null;
$display_link_target = ( isset( $input['display_link_target'] ) ) ? 'on' : null;
//Filter display text
$display_start_text = wp_filter_kses( $input['display_start_text'] );
$display_end_text = wp_filter_kses( $input['display_end_text'] );
$display_location_text = wp_filter_kses( $input['display_location_text'] );
$display_desc_text = wp_filter_kses( $input['display_desc_text'] );
$display_link_text = wp_filter_kses( $input['display_link_text'] );
$display_separator = wp_filter_kses( $input['display_separator'] );
$display_desc_limit = ( 0 == absint( $input['display_desc_limit'] ) ) ? '' : absint( $input['display_desc_limit'] );
$use_builder = ( 'false' == $input['use_builder'] ) ? 'false' : 'true';
$builder = wp_kses_post( $input['builder'] );
//Fill options array with validated values
$options[$id] = array(
'id' => $id,
'title' => $title,
'url' => $url,
'retrieve_from' => $retrieve_from,
'retrieve_until' => $retrieve_until,
'retrieve_from_value' => $retrieve_from_value,
'retrieve_until_value' => $retrieve_until_value,
'max_events' => $max_events,
'date_format' => $date_format,
'time_format' => $time_format,
'timezone' => $timezone,
'cache_duration' => $cache_duration,
'multiple_day' => $multiple_day,
'display_start' => $display_start,
'display_end' => $display_end,
'display_location' => $display_location,
'display_desc' => $display_desc,
'display_link' => $display_link,
'display_start_text' => $display_start_text,
'display_end_text' => $display_end_text,
'display_location_text' => $display_location_text,
'display_desc_text' => $display_desc_text,
'display_desc_limit' => $display_desc_limit,
'display_link_text' => $display_link_text,
'display_link_target' => $display_link_target,
'display_separator' => $display_separator,
'use_builder' => $use_builder,
'builder' => $builder
);
if ( isset( $input['submit_add'] ) )
add_settings_error( 'gce_options', 'gce_added', __( sprintf( 'Feed %s added.', absint( $input['id'] ) ), GCE_TEXT_DOMAIN ), 'updated' );
else
add_settings_error( 'gce_options', 'gce_edited', __( sprintf( 'Settings for feed %s updated.', absint( $input['id'] ) ), GCE_TEXT_DOMAIN ), 'updated' );
}
return $options;
}
//Validate submitted general options
function validate_general_options( $input ) {
$options = get_option(GCE_GENERAL_OPTIONS_NAME);
$options['stylesheet'] = esc_url( $input['stylesheet'] );
$options['javascript'] = ( isset( $input['javascript'] ) ) ? true : false;
$options['loading'] = esc_html( $input['loading'] );
$options['error'] = wp_filter_kses( $input['error'] );
$options['fields'] = ( isset( $input['fields'] ) ) ? true : false;
$options['old_stylesheet'] = ( isset( $input['old_stylesheet'] ) ) ? true : false;
add_settings_error( 'gce_general', 'gce_general_updated', __( 'General options updated.', GCE_TEXT_DOMAIN ), 'updated' );
return $options;
}
//Delete all transients (cached feed data) associated with feed specified
function delete_feed_transients( $id ) {
delete_transient( 'gce_feed_' . $id );
delete_transient( 'gce_feed_' . $id . '_url' );
}
//Handles the shortcode stuff
function shortcode_handler( $atts ) {
$options = get_option( GCE_OPTIONS_NAME );
//Check that any feeds have been added
if ( is_array( $options ) && ! empty( $options ) ) {
extract( shortcode_atts( array(
'id' => '',
'type' => 'grid',
'title' => false,
'max' => 0,
'order' => 'asc'
), $atts ) );
$no_feeds_exist = true;
$feed_ids = array();
if ( '' != $id ) {
//Break comma delimited list of feed ids into array
$feed_ids = explode( ',', str_replace( ' ', '', $id ) );
//Check each id is an integer, if not, remove it from the array
foreach ( $feed_ids as $key => $feed_id ) {
if ( 0 == absint( $feed_id ) )
unset( $feed_ids[$key] );
}
//If at least one of the feed ids entered exists, set no_feeds_exist to false
foreach ( $feed_ids as $feed_id ) {
if ( isset($options[$feed_id] ) )
$no_feeds_exist = false;
}
} else {
foreach ( $options as $feed ) {
$feed_ids[] = $feed['id'];
}
$no_feeds_exist = false;
}
//Ensure max events is a positive integer
$max_events = absint( $max );
//Ensure sort order is asc or desc
$sort_order = ( 'desc' == $order ) ? 'desc' : 'asc';
//Check that at least one valid feed id has been entered
if ( empty( $feed_ids ) || $no_feeds_exist ) {
return __( 'No valid Feed IDs have been entered for this shortcode. Please check that you have entered the IDs correctly and that the Feeds have not been deleted.', GCE_TEXT_DOMAIN );
} else {
//Turns feed_ids back into string of feed ids delimited by '-' ('1-2-3-4' for example)
$feed_ids = implode( '-', $feed_ids );
//If title has been omitted from shortcode, set title_text to null, otherwise set to title (even if empty string)
$title_text = ( false === $title ) ? null : $title;
switch ( $type ) {
case 'grid':
return gce_print_grid( $feed_ids, $title_text, $max_events );
case 'ajax':
return gce_print_grid( $feed_ids, $title_text, $max_events, true );
case 'list':
return gce_print_list( $feed_ids, $title_text, $max_events, $sort_order );
case 'list-grouped':
return gce_print_list( $feed_ids, $title_text, $max_events, $sort_order, true );
}
}
} else {
return __( 'No feeds have been added yet. You can add a feed in the Google Calendar Events settings.', GCE_TEXT_DOMAIN );
}
}
//Adds the required CSS
function add_styles() {
//Don't add styles if on admin screens
if( ! is_admin() ) {
wp_enqueue_style( 'gce_styles', WP_PLUGIN_URL . '/' . GCE_PLUGIN_NAME . '/css/gce-style.css' );
$options = get_option( GCE_GENERAL_OPTIONS_NAME );
//If old stylesheet option is enabled, enqueue old styles
if ( $options['old_stylesheet'] )
wp_enqueue_style( 'gce_old_styles', WP_PLUGIN_URL . '/' . GCE_PLUGIN_NAME . '/css/gce-old-style.css' );
//If user has entered a URL to a custom stylesheet, enqueue it too
if( '' != $options['stylesheet'] )
wp_enqueue_style( 'gce_custom_styles', $options['stylesheet'] );
}
}
//Adds the required scripts
function add_scripts() {
//Don't add scripts if on admin screens
if ( ! is_admin() ) {
$options = get_option( GCE_GENERAL_OPTIONS_NAME );
$add_to_footer = (bool) $options['javascript'];
wp_enqueue_script( 'jquery' );
wp_enqueue_script( 'gce_jquery_qtip', WP_PLUGIN_URL . '/' . GCE_PLUGIN_NAME . '/js/jquery-qtip.js', array( 'jquery' ), null, $add_to_footer );
wp_enqueue_script( 'gce_scripts', WP_PLUGIN_URL . '/' . GCE_PLUGIN_NAME . '/js/gce-script.js', array( 'jquery' ), null, $add_to_footer );
wp_localize_script( 'gce_scripts', 'GoogleCalendarEvents', array(
'ajaxurl' => admin_url( 'admin-ajax.php' ),
'loading' => $options['loading']
) );
} else {
wp_enqueue_script( 'gce_scripts', WP_PLUGIN_URL . '/' . GCE_PLUGIN_NAME . '/js/gce-admin-script.js', array( 'jquery' ) );
}
}
//AJAX stuffs
function gce_ajax() {
if ( isset( $_GET['gce_feed_ids'] ) ) {
$ids = esc_html( $_GET['gce_feed_ids'] );
$title = esc_html( $_GET['gce_title_text'] );
$max = absint( $_GET['gce_max_events'] );
$month = absint( $_GET['gce_month'] );
$year = absint( $_GET['gce_year'] );
if ( 'page' == $_GET['gce_type'] ) {
//The page grid markup to be returned via AJAX
echo gce_print_grid( $ids, $title, $max, true, $month, $year );
} elseif ( 'widget' == $_GET['gce_type'] ) {
$widget = esc_html( $_GET['gce_widget_id'] );
//The widget grid markup to be returned via AJAX
gce_widget_content_grid( $ids, $title, $max, $widget, true, $month, $year );
}
}
die();
}
}
}
function gce_print_list( $feed_ids, $title_text, $max_events, $sort_order, $grouped = false ) {
require_once 'inc/gce-parser.php';
$ids = explode( '-', $feed_ids );
//Create new GCE_Parser object, passing array of feed id(s)
$list = new GCE_Parser( $ids, $title_text, $max_events, $sort_order );
$num_errors = $list->get_num_errors();
//If there are less errors than feeds parsed, at least one feed must have parsed successfully so continue to display the list
if ( $num_errors < count( $ids ) ) {
$markup = '' . $list->get_list( $grouped ) . '
';
//If there was at least one error, return the list markup with error messages (for admins only)
if ( $num_errors > 0 && current_user_can( 'manage_options' ) )
return $list->error_messages() . $markup;
//Otherwise just return the list markup
return $markup;
} else {
//If current user is an admin, display an error message explaining problem(s). Otherwise, display a 'nice' error messsage
if ( current_user_can( 'manage_options' ) ) {
return $list->error_messages();
} else {
$options = get_option( GCE_GENERAL_OPTIONS_NAME );
return $options['error'];
}
}
}
function gce_print_grid( $feed_ids, $title_text, $max_events, $ajaxified = false, $month = null, $year = null ) {
require_once 'inc/gce-parser.php';
$ids = explode( '-', $feed_ids );
//Create new GCE_Parser object, passing array of feed id(s) returned from gce_get_feed_ids()
$grid = new GCE_Parser( $ids, $title_text, $max_events );
$num_errors = $grid->get_num_errors();
//If there are less errors than feeds parsed, at least one feed must have parsed successfully so continue to display the grid
if ( $num_errors < count( $ids ) ) {
$markup = '';
//Add AJAX script if required
if ( $ajaxified )
$markup .= '';
$markup .= $grid->get_grid( $year, $month, $ajaxified ) . '
';
//If there was at least one error, return the grid markup with an error message (for admins only)
if ( $num_errors > 0 && current_user_can( 'manage_options' ) )
return $grid->error_messages() . $markup;
//Otherwise just return the grid markup
return $markup;
} else {
//If current user is an admin, display an error message explaining problem. Otherwise, display a 'nice' error messsage
if ( current_user_can( 'manage_options' ) ) {
return $grid->error_messages();
} else {
$options = get_option( GCE_GENERAL_OPTIONS_NAME );
return $options['error'];
}
}
}
$gce = new Google_Calendar_Events();
?>