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<?php
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/**
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* @file
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*
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* This module creates a form element that allows users to select
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* repeat rules for a date, and reworks the result into an iCal
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* RRULE string that can be stored in the database.
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*
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* The module also parses iCal RRULEs to create an array of dates
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* that meet their criteria.
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*
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* Other modules can use this API to add self-validating form elements
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* to their dates, and identify dates that meet the RRULE criteria.
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*
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*/
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/**
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* Implements hook_element_info().
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*/
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function date_repeat_element_info() {
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$type['date_repeat_rrule'] = array(
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'#input' => TRUE,
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'#process' => array('date_repeat_rrule_process'),
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'#element_validate' => array('date_repeat_rrule_validate'),
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'#theme_wrappers' => array('date_repeat_rrule'),
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);
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$type['date_repeat_form_element_radios'] = array(
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'#input' => TRUE,
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'#process' => array('date_repeat_form_element_radios_process'),
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'#theme_wrappers' => array('radios'),
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'#pre_render' => array('form_pre_render_conditional_form_element'),
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);
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if (module_exists('ctools')) {
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$type['date_repeat_rrule']['#pre_render'] = array('ctools_dependent_pre_render');
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}
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return $type;
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}
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function date_repeat_theme() {
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return array(
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'date_repeat_current_exceptions' => array('render element' => 'element'),
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'date_repeat_current_additions' => array('render element' => 'element'),
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'date_repeat_rrule' => array('render element' => 'element'),
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);
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}
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/**
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* Helper function for FREQ options.
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*/
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function date_repeat_freq_options() {
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return array(
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'DAILY' => t('Daily', array(), array('context' => 'datetime_singular')),
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'WEEKLY' => t('Weekly', array(), array('context' => 'datetime_singular')),
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'MONTHLY' => t('Monthly', array(), array('context' => 'datetime_singular')),
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'YEARLY' => t('Yearly', array(), array('context' => 'datetime_singular')),
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);
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}
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function date_repeat_interval_options() {
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$options = range(0, 366);
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unset($options[0]);
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return $options;
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}
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/**
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* Helper function for FREQ options.
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*
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* Translated and untranslated arrays of the iCal day of week names.
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* We need the untranslated values for date_modify(), translated
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* values when displayed to user.
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*/
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function date_repeat_dow_day_options($translated = TRUE) {
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return array(
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'SU' => $translated ? t('Sunday', array(), array('context' => 'day_name')) : 'Sunday',
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'MO' => $translated ? t('Monday', array(), array('context' => 'day_name')) : 'Monday',
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'TU' => $translated ? t('Tuesday', array(), array('context' => 'day_name')) : 'Tuesday',
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'WE' => $translated ? t('Wednesday', array(), array('context' => 'day_name')) : 'Wednesday',
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'TH' => $translated ? t('Thursday', array(), array('context' => 'day_name')) : 'Thursday',
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'FR' => $translated ? t('Friday', array(), array('context' => 'day_name')) : 'Friday',
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'SA' => $translated ? t('Saturday', array(), array('context' => 'day_name')) : 'Saturday',
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);
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}
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/**
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* Helper function for FREQ options.
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*
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* Translated and untranslated arrays of the iCal abbreviated day of week names.
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*/
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function date_repeat_dow_day_options_abbr($translated = TRUE, $length = 3) {
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$return = array();
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switch ($length) {
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case 1:
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$context = 'day_abbr1';
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break;
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case 2:
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$context = 'day_abbr2';
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break;
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default:
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$context = '';
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break;
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}
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foreach (date_repeat_dow_day_untranslated() as $key => $day) {
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$return[$key] = $translated ? t(substr($day, 0, $length), array(), array('context' => $context)) : substr($day, 0, $length);
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}
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return $return;
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}
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function date_repeat_dow_day_untranslated() {
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static $date_repeat_weekdays;
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if (empty($date_repeat_weekdays)) {
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$date_repeat_weekdays = array('SU' => 'Sunday', 'MO' => 'Monday', 'TU' => 'Tuesday',
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'WE' => 'Wednesday', 'TH' => 'Thursday', 'FR' => 'Friday',
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'SA' => 'Saturday');
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}
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return $date_repeat_weekdays;
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}
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function date_repeat_dow_day_options_ordered($weekdays) {
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$day_keys = array_keys($weekdays);
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$day_values = array_values($weekdays);
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for ($i = 1; $i <= variable_get('date_first_day', 0); $i++) {
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$last_key = array_shift($day_keys);
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array_push($day_keys, $last_key);
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$last_value = array_shift($day_values);
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array_push($day_values, $last_value);
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}
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$weekdays = array_combine($day_keys, $day_values);
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return $weekdays;
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}
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/**
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* Helper function for BYDAY options.
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*/
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function date_repeat_dow_count_options() {
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return array('' => t('Every', array(), array('context' => 'date_order'))) + date_order_translated();
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}
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/**
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* Helper function for BYDAY options.
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*
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* Creates options like -1SU and 2TU
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*/
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function date_repeat_dow_options() {
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$options = array();
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foreach (date_repeat_dow_count_options() as $count_key => $count_value) {
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foreach (date_repeat_dow_day_options() as $dow_key => $dow_value) {
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$options[$count_key . $dow_key] = $count_value . ' ' . $dow_value;
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}
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}
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return $options;
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}
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/**
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* Translate a day of week position to the iCal day name.
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*
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* Used with date_format($date, 'w') or get_variable('date_first_day'),
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* which return 0 for Sunday, 1 for Monday, etc.
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*
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* dow 2 becomes 'TU', dow 3 becomes 'WE', and so on.
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*/
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function date_repeat_dow2day($dow) {
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$days_of_week = array_keys(date_repeat_dow_day_options(FALSE));
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return $days_of_week[$dow];
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}
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/**
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* Shift the array of iCal day names into the right order
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* for a specific week start day.
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*/
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function date_repeat_days_ordered($week_start_day) {
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$days = array_flip(array_keys(date_repeat_dow_day_options(FALSE)));
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$start_position = $days[$week_start_day];
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$keys = array_flip($days);
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if ($start_position > 0) {
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for ($i = 1; $i <= $start_position; $i++) {
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$last = array_shift($keys);
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array_push($keys, $last);
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}
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}
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return $keys;
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}
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/**
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* Build a description of an iCal rule.
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*
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* Constructs a human-readable description of the rule.
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*/
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function date_repeat_rrule_description($rrule, $format = 'D M d Y') {
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// Empty or invalid value.
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if (empty($rrule) || !strstr($rrule, 'RRULE')) {
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return;
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}
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module_load_include('inc', 'date_api', 'date_api_ical');
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module_load_include('inc', 'date_repeat', 'date_repeat_calc');
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$parts = date_repeat_split_rrule($rrule);
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$additions = $parts[2];
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$exceptions = $parts[1];
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$rrule = $parts[0];
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if ($rrule['FREQ'] == 'NONE') {
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return;
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}
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// Make sure there will be an empty description for any unused parts.
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$description = array(
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'!interval' => '',
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'!byday' => '',
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'!bymonth' => '',
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'!count' => '',
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'!until' => '',
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'!except' => '',
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'!additional' => '',
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'!week_starts_on' => '',
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);
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$interval = date_repeat_interval_options();
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switch ($rrule['FREQ']) {
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case 'WEEKLY':
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$description['!interval'] = format_plural($rrule['INTERVAL'], 'every week', 'every @count weeks') . ' ';
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break;
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case 'MONTHLY':
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$description['!interval'] = format_plural($rrule['INTERVAL'], 'every month', 'every @count months') . ' ';
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break;
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case 'YEARLY':
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$description['!interval'] = format_plural($rrule['INTERVAL'], 'every year', 'every @count years') . ' ';
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break;
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default:
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$description['!interval'] = format_plural($rrule['INTERVAL'], 'every day', 'every @count days') . ' ';
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break;
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}
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if (!empty($rrule['BYDAY'])) {
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$days = date_repeat_dow_day_options();
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$counts = date_repeat_dow_count_options();
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$results = array();
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foreach ($rrule['BYDAY'] as $byday) {
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// Get the numeric part of the BYDAY option, i.e. +3 from +3MO.
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$day = substr($byday, -2);
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$count = str_replace($day, '', $byday);
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if (!empty($count)) {
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// See if there is a 'pretty' option for this count, i.e. +1 => First.
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$order = array_key_exists($count, $counts) ? strtolower($counts[$count]) : $count;
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$results[] = trim(t('!repeats_every_interval on the !date_order !day_of_week', array('!repeats_every_interval ' => '', '!date_order' => $order, '!day_of_week' => $days[$day])));
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}
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else {
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$results[] = trim(t('!repeats_every_interval every !day_of_week', array('!repeats_every_interval ' => '', '!day_of_week' => $days[$day])));
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}
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}
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$description['!byday'] = implode(' ' . t('and') . ' ', $results);
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}
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if (!empty($rrule['BYMONTH'])) {
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if (sizeof($rrule['BYMONTH']) < 12) {
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$results = array();
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$months = date_month_names();
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foreach ($rrule['BYMONTH'] as $month) {
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$results[] = $months[$month];
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}
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if (!empty($rrule['BYMONTHDAY'])) {
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$description['!bymonth'] = trim(t('!repeats_every_interval on the !month_days of !month_names', array('!repeats_every_interval ' => '', '!month_days' => implode(', ', $rrule['BYMONTHDAY']), '!month_names' => implode(', ', $results))));
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}
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else {
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$description['!bymonth'] = trim(t('!repeats_every_interval on !month_names', array('!repeats_every_interval ' => '', '!month_names' => implode(', ', $results))));
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}
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}
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}
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if ($rrule['INTERVAL'] < 1) {
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$rrule['INTERVAL'] = 1;
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}
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if (!empty($rrule['COUNT'])) {
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$description['!count'] = trim(t('!repeats_every_interval !count times', array('!repeats_every_interval ' => '', '!count' => $rrule['COUNT'])));
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}
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if (!empty($rrule['UNTIL'])) {
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$until = date_ical_date($rrule['UNTIL'], 'UTC');
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date_timezone_set($until, date_default_timezone_object());
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$description['!until'] = trim(t('!repeats_every_interval until !until_date', array('!repeats_every_interval ' => '', '!until_date' => date_format_date($until, 'custom', $format))));
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}
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if ($exceptions) {
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$values = array();
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foreach ($exceptions as $exception) {
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$except = date_ical_date($exception, 'UTC');
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date_timezone_set($except, date_default_timezone_object());
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$values[] = date_format_date($except, 'custom', $format);
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}
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$description['!except'] = trim(t('!repeats_every_interval except !except_dates', array('!repeats_every_interval ' => '', '!except_dates' => implode(', ', $values))));
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}
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286
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if (!empty($rrule['WKST'])) {
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$day_names = date_repeat_dow_day_options();
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$description['!week_starts_on'] = trim(t('!repeats_every_interval where the week start on !day_of_week', array('!repeats_every_interval ' => '', '!day_of_week' => $day_names[trim($rrule['WKST'])])));
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}
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290
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if ($additions) {
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$values = array();
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foreach ($additions as $addition) {
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$add = date_ical_date($addition, 'UTC');
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date_timezone_set($add, date_default_timezone_object());
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$values[] = date_format_date($add, 'custom', $format);
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}
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297
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$description['!additional'] = trim(t('Also includes !additional_dates.', array('!additional_dates' => implode(', ', $values))));
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}
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return t('Repeats !interval !bymonth !byday !count !until !except. !additional', $description);
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300
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}
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301
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302
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/**
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303
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* Parse an iCal rule into a parsed RRULE array and an EXDATE array.
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304
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*/
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305
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function date_repeat_split_rrule($rrule) {
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306
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$parts = explode("\n", str_replace("\r\n", "\n", $rrule));
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$rrule = array();
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308
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$exceptions = array();
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$additions = array();
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310
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$additions = array();
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311
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foreach ($parts as $part) {
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if (strstr($part, 'RRULE')) {
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$RRULE = str_replace('RRULE:', '', $part);
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$rrule = (array) date_ical_parse_rrule('RRULE:', $RRULE);
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}
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elseif (strstr($part, 'EXDATE')) {
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$EXDATE = str_replace('EXDATE:', '', $part);
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318
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$exceptions = (array) date_ical_parse_exceptions('EXDATE:', $EXDATE);
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unset($exceptions['DATA']);
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320
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}
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321
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elseif (strstr($part, 'RDATE')) {
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$RDATE = str_replace('RDATE:', '', $part);
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$additions = (array) date_ical_parse_exceptions('RDATE:', $RDATE);
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unset($additions['DATA']);
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}
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326
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}
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327
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return array($rrule, $exceptions, $additions);
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328
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}
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329
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330
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/**
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331
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* Analyze a RRULE and return dates that match it.
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332
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*/
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333
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function date_repeat_calc($rrule, $start, $end, $exceptions = array(), $timezone = NULL, $additions = array()) {
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334
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module_load_include('inc', 'date_repeat', 'date_repeat_calc');
|
|
335
|
return _date_repeat_calc($rrule, $start, $end, $exceptions, $timezone, $additions);
|
|
336
|
}
|
|
337
|
|
|
338
|
/**
|
|
339
|
* Generate the repeat rule setting form.
|
|
340
|
*/
|
|
341
|
function date_repeat_rrule_process($element, &$form_state, $form) {
|
|
342
|
module_load_include('inc', 'date_repeat', 'date_repeat_form');
|
|
343
|
return _date_repeat_rrule_process($element, $form_state, $form);
|
|
344
|
}
|
|
345
|
|
|
346
|
/**
|
|
347
|
* Process function for 'date_repeat_form_element_radios'.
|
|
348
|
*/
|
|
349
|
function date_repeat_form_element_radios_process($element) {
|
|
350
|
$childrenkeys = element_children($element);
|
|
351
|
|
|
352
|
if (count($element['#options']) &&
|
|
353
|
count($element['#options']) == count($childrenkeys)) {
|
|
354
|
$weight = 0;
|
|
355
|
$children = array();
|
|
356
|
$classes = isset($element['#div_classes']) ?
|
|
357
|
$element['#div_classes'] : array();
|
|
358
|
foreach ($childrenkeys as $childkey) {
|
|
359
|
$children[$childkey] = $element[$childkey];
|
|
360
|
unset($element[$childkey]);
|
|
361
|
}
|
|
362
|
foreach ($element['#options'] as $key => $choice) {
|
|
363
|
$currentchildkey = array_shift($childrenkeys);
|
|
364
|
$weight += 0.001;
|
|
365
|
$class = array_shift($classes);
|
|
366
|
$element += array($key => array());
|
|
367
|
$parents_for_id = array_merge($element['#parents'], array($key));
|
|
368
|
$element[$key] += array(
|
|
369
|
'#prefix' => '<div' . ($class ? " class=\"{$class}\"" : '') . '>',
|
|
370
|
'#type' => 'radio',
|
|
371
|
'#title' => $choice,
|
|
372
|
'#title_display' => 'invisible',
|
|
373
|
'#return_value' => $key,
|
|
374
|
'#default_value' => isset($element['#default_value']) ?
|
|
375
|
$element['#default_value'] : NULL,
|
|
376
|
'#attributes' => $element['#attributes'],
|
|
377
|
'#parents' => $element['#parents'],
|
|
378
|
'#id' => drupal_html_id('edit-' . implode('-', $parents_for_id)),
|
|
379
|
'#ajax' => isset($element['#ajax']) ? $element['ajax'] : NULL,
|
|
380
|
'#weight' => $weight,
|
|
381
|
'#theme_wrappers' => array(),
|
|
382
|
'#suffix' => ' ',
|
|
383
|
);
|
|
384
|
|
|
385
|
$child = $children[$currentchildkey];
|
|
386
|
|
|
387
|
$weight += 0.001;
|
|
388
|
|
|
389
|
$child['#weight'] = $weight;
|
|
390
|
$child['#title_display'] = 'invisible';
|
|
391
|
$child['#suffix'] = (!empty($child['#suffix']) ? $child['#suffix'] : '') .
|
|
392
|
'</div>';
|
|
393
|
$child['#parents'] = $element['#parents'];
|
|
394
|
array_pop($child['#parents']);
|
|
395
|
array_push($child['#parents'], $currentchildkey);
|
|
396
|
|
|
397
|
$element_prototype = element_info($child['#type']);
|
|
398
|
$old_wrappers = array();
|
|
399
|
if (isset($child['#theme_wrappers'])) {
|
|
400
|
$old_wrappers += $child['#theme_wrappers'];
|
|
401
|
}
|
|
402
|
if (isset($element_prototype['#theme_wrappers'])) {
|
|
403
|
$old_wrappers += $element_prototype['#theme_wrappers'];
|
|
404
|
}
|
|
405
|
|
|
406
|
$child['#theme_wrappers'] = array();
|
|
407
|
|
|
408
|
foreach ($old_wrappers as $wrapper) {
|
|
409
|
if ($wrapper != 'form_element') {
|
|
410
|
$child['#theme_wrappers'][] = $wrapper;
|
|
411
|
}
|
|
412
|
}
|
|
413
|
|
|
414
|
$element[$currentchildkey] = $child;
|
|
415
|
}
|
|
416
|
}
|
|
417
|
|
|
418
|
return $element;
|
|
419
|
}
|
