function mem_date_processing($start_date, $end_date)
{
// Initalizing our variables
$start_date_iso = $start_date;
$end_date_iso = $end_date;
$event_date = '';
$event_date_short = '';
$event_date_basic = '';
$event_date_num = '';
$event_date_yr = '';
$start_year = '';
$end_year = '';
$unix_start = '';
$unix_end = '';
$event_is_future = false;
$event_is_ongoing = false;
$ndash = '<span class="ndash">–</span>';
// Step 1 - test and define start date values
// ******************************************
if ($start_date !== "") {
if (strlen($start_date) > 5) {
// the MONTH is defined
if (strlen($start_date) > 7) {
// the DAY is defined
if (strlen($start_date) > 10) {
// the TIME is defined
$start_date_iso = substr_replace($start_date, 'T', 10, 1);
// replace space with T in iso string // 2013-03-11T06:35
} else {
// 10
// the DAY is defined, but no time
}
// 10
} else {
// 7
// the MONTH is defined, but no DAY
// fix $start_date_iso - add day.
$start_date_iso .= '-01';
}
// 7
$unix_start = strtotime($start_date_iso);
$start_year = date("Y", $unix_start);
$start_month = date_i18n("F", $unix_start);
} else {
// 5
// only the YEAR is defined
$event_date = $start_date;
$start_year = $start_date;
// NOTE:
// $unix_start is not yet defined.
// let's create a fake ISO / Unix_Start.
$start_date_iso .= '-01-01';
$unix_start = strtotime($start_date_iso);
}
// 5
$event_date_yr = $start_year;
}
// Step 2 - test and define END date values
// ****************************************
if ($end_date !== "") {
if (strlen($end_date) > 5) {
// the MONTH is defined
if (strlen($end_date) > 7) {
// the DAY is defined
if (strlen($end_date) > 10) {
// the TIME is defined
$end_date_iso = substr_replace($end_date, 'T', 10, 1);
} else {
// shorter than 10 digits =
// DAY is defined, but no time
}
// end testing for 10 digits
} else {
// shorter than 7 digits =
// MONTH is defined, but no day
// default end day for ISO date stamp
$end_date_iso .= '-31';
}
// end testing for 7 digits
$unix_end = strtotime($end_date_iso);
$end_year = date("Y", $unix_end);
$end_month = date_i18n("F", $unix_end);
} else {
// shorter than 5 digits =
// only the YEAR is defined
$end_year = $end_date;
// default end month/day for ISO date stamp
$end_date_iso .= '-12-31';
$unix_end = strtotime($end_date_iso);
}
// end testing for 5 digits
if ($end_year != $start_year) {
$event_date_yr .= $ndash . $end_year;
}
} else {
// no end date defined at all.
$end_date_iso = $start_date_iso;
$end_year = $start_year;
$unix_end = $unix_start;
/*
Q:
Why do we define those values if no end date exists?
A:
Because they allow us to sort a series of events by their end date
- even if the end date isn't defined (in which case the start date is used).
Important: we don't change the $end_date value.
The $end_date value can be used to test if the user entered an end date.
*/
}
// 3) process the values
// Condition 1: do we have a start date?
// *************************************
if ($start_date !== "") {
// Condition 2: is the MONTH defined ?
// ***********************************
if (strlen($start_date) > 5) {
// Condition 3: do we have an end date ?
// *************************************
if ($end_date !== "") {
// YES, we have START and END date.
// ********************************
// Condition 4: does start/end occur in the same year?
// ***************************************************
if ($start_year == $end_year) {
// YES, same YEAR
// Condition 5: do start/end occur the same month?
// ***********************************************
if ($start_month == $end_month) {
// YES, same MONTH
// We could test if start DAY is defined - but since we have start/end date,
// and it's the same month, we can assume DAY is defined.
// Exception: November - 15th December.
// Condition 6: do start/end occur the same day?
// *********************************************
$start_day = date("j", $unix_start);
// j = 1 to 31
$end_day = date("j", $unix_end);
$event_date_short = date_i18n("F Y", $unix_start);
if ($start_day == $end_day) {
// yes, same day!
// 5) the events must have a different time
// *****************************************
if (date("j", $unix_start) == 1) {
// 1er
$event_date = date_i18n(_x('l F jS Y, g:i a', 'First day of month', 'mem'), $unix_start);
$event_date_basic = date_i18n(_x('F j', 'First day of month', 'mem'), $unix_start);
} else {
$event_date = date_i18n(_x('l F jS Y, g:i a', 'Other day of month', 'mem'), $unix_start);
$event_date_basic = date_i18n(_x('F j', 'Other day of month', 'mem'), $unix_start);
}
// add the end time
$event_date .= $ndash . date(__('g:i a', 'mem'), $unix_end);
// numbers only: 31.12.2014
$event_date_num = date(__('j.n.Y', 'mem'), $unix_start);
} else {
// two different days, but SAME month.
// Example: March 4th-15th 2013
if (date("j", $unix_start) == 1) {
// 1er
$event_date = date_i18n(_x('F jS', 'First day of same month', 'mem'), $unix_start);
// \D\u j\e\\r
$event_date_basic = date_i18n(_x('F j', 'First day of month', 'mem'), $unix_start);
} else {
$event_date = date_i18n(_x('F jS', 'Other day of same month', 'mem'), $unix_start);
// Du 3 ... // \D\u j
$event_date_basic = date_i18n(_x('F j', 'Other day of same month', 'mem'), $unix_start);
}
// Add END date
$event_date .= date_i18n(__('–jS Y', 'mem'), $unix_end);
// au 17 mars 2012
$event_date_basic .= date_i18n(_x('–j', 'mem'), $unix_end);
$event_date_num = date(__('j', 'mem'), $unix_start);
$event_date_num .= $ndash . date(__('j.n.Y', 'mem'), $unix_end);
}
// end condition 6 // start day equals end day.
} else {
// ELSE condition 5 // two different MONTHS, but same year
$event_date_short = date_i18n("F", $unix_start);
// janvier
$event_date_short .= $ndash . date_i18n("F Y", $unix_end);
// - mars 2012
// condition 6 // TEST if the start DAY is definded
// ************************************************
if (strlen($start_date) > 7) {
if (date_i18n("j", $unix_start) == 1) {
// 1er
$event_date = date_i18n(_x('F jS', 'First day of diff month', 'mem'), $unix_start);
} else {
// sinon
$event_date = date_i18n(_x('F jS', 'Other day of diff month', 'mem'), $unix_start);
}
// process end date.
if (date_i18n("j", $unix_end) == 1) {
// 1er
$event_date .= date_i18n(_x(' – F jS Y', 'First day of month', 'mem'), $unix_end);
} else {
// sinon
$event_date .= date_i18n(_x(' – F jS Y', 'Other day of month', 'mem'), $unix_end);
}
// numbers: 18.9-5.10.2014
$event_date_num = date(__('j.n–', 'mem'), $unix_start);
$event_date_num .= date(__('j.n.Y', 'mem'), $unix_end);
} else {
// Start DAY not defined = output only the month.
$event_date = $event_date_short;
$event_date_num = date(__('n', 'mem'), $unix_start);
$event_date_num .= $ndash . date(__('n.Y', 'mem'), $unix_end);
// note: some weird cases aren't covered here.
}
// END condition 6
}
// END condition 5 // END month testing
} else {
// ELSE condition 4 //
// START YEAR is different from END YEAR
// *************************************
// note: we already KNOW that start month IS defined.
$event_date_short = date_i18n("F Y", $unix_start);
// janvier 2010
// condition 5-A // is START DAY defined?
// **************************************
if (strlen($start_date) > 7) {
// START DAY is defined
// Example = December 15th 2013 - January 3rd 2014
if (date_i18n("j", $unix_start) == 1) {
// 1er
$event_date = date_i18n(_x('F jS Y', 'First day of diff year', 'mem'), $unix_start);
// $event_date = date_i18n( "\D\u j F Y", $unix_start); // 3 janvier 2010 ...
} else {
// sinon
$event_date = date_i18n(_x('F jS Y', 'Other day of diff year', 'mem'), $unix_start);
// $event_date = date_i18n( "\D\u j F Y", $unix_start); // 3 janvier 2010 ...
}
$event_date_num = date(__('j.n.Y', 'mem'), $unix_start);
} else {
// START DAY is not defined, only the MONTH.
$event_date = $event_date_short;
$event_date_num = date(__('n.Y', 'mem'), $unix_start);
$event_date_num .= $ndash . date(__('n.Y', 'mem'), $unix_end);
}
// close condition 5-A // START DAY
// condition 5-B // is the END DAY defined?
// ****************************************
if (strlen($end_date) > 7) {
// END DAY is defined
// $event_date .= date_i18n( " \a\u j F Y", $unix_end); // 17 mars 2012
if (date_i18n("j", $unix_end) == 1) {
// 1er
$event_date .= date_i18n(_x(' – F jS Y', 'First day of month', 'mem'), $unix_end);
} else {
// sinon
$event_date .= date_i18n(_x(' – F jS Y', 'Other day of month', 'mem'), $unix_end);
}
$event_date_num .= $ndash . date(__('j.n.Y', 'mem'), $unix_end);
$event_date_short .= ' ' . $ndash . ' ' . date_i18n("F Y", $unix_end);
// mars 2012
} else {
if (strlen($end_date) > 5) {
// only END MONTH is defined
$event_date_short .= $ndash . date_i18n("F Y", $unix_end);
// mars 2012
$event_date = $event_date_short;
$event_date_num .= $ndash . date(__('n.Y', 'mem'), $unix_end);
} else {
// only END YEAR is defined
$event_date_short .= $ndash . date("Y", $unix_end);
// mars 2012
$event_date = $event_date_short;
$event_date_num .= $ndash . date(__('Y', 'mem'), $unix_end);
}
}
// END condition 5-B // testing the end_date
}
// END condition 4 // $start_year == $end_year // END year testing
} else {
// ELSE condition 3 //
// END date is not defined.
// we have ONLY a START date.
// **************************
$event_date_short = date_i18n("F Y", $unix_start);
// janvier 2010
// condition 4 // test if START DAY is defined.
if (strlen($start_date) > 7) {
$event_date_num = date(__('j.n.Y', 'mem'), $unix_start);
// condition 5 // test if TIME is defined.
if (strlen($start_date) > 11) {
if (date("j", $unix_start) == 1) {
// 1st day of month ?
$event_date = date_i18n(_x('l F jS Y, g:i a', 'First day of month', 'mem'), $unix_start);
} else {
$event_date = date_i18n(_x('l F jS Y, g:i a', 'Other day of month', 'mem'), $unix_start);
}
} else {
// condition 5 // START TIME is not defined.
if (date("j", $unix_start) == 1) {
// 1st day of month ?
$event_date = date_i18n(_x('l, F jS Y', 'First day of month', 'mem'), $unix_start);
} else {
$event_date = date_i18n(_x('l, F jS Y', 'Other day of month', 'mem'), $unix_start);
}
}
// END condition 5 : end testing for TIME.
} else {
// ELSE condition 4 : START DAY is not defined.
$event_date = $event_date_short;
$event_date_num = date(__('n.Y', 'mem'), $unix_start);
}
// END condition 4 // end testing for START DAY.
}
// END condition 3 (end_date testing).
} else {
// condition 2 // start date > 5 // START YEAR only is defined //
// For YEAR ONLY display:
// Test if we should show the END year.
// ************************************
if ($end_date !== "") {
if ($end_year != $start_year) {
$event_date .= $ndash . $end_year;
}
}
$event_date_short = $event_date;
$event_date_num = $event_date;
}
// END condition 2 (YEAR only)
}
// END condition 1.
// is this a future event?
$mem_today = mem_date_of_today();
if ($mem_today["unix"] <= $unix_start) {
$event_is_future = true;
}
// is this an ongoing event?
if ($mem_today["unix"] <= $unix_end) {
$event_is_ongoing = true;
}
// build an ARRAY to return:
$event_date_array = array("date" => $event_date, "date-short" => $event_date_short, "date-basic" => $event_date_basic, "date-num" => $event_date_num, "start-iso" => $start_date_iso, "end-iso" => $end_date_iso, "start-unix" => $unix_start, "end-unix" => $unix_end, "date-year" => $event_date_yr, "start-year" => $start_year, "end-year" => $end_year, "is-future" => $event_is_future, "is-ongoing" => $event_is_ongoing);
return $event_date_array;
}
/**
* Front-end display of widget.
*
* @see WP_Widget::widget()
*
* @param array $args Widget arguments.
* @param array $instance Saved values from database.
*/
function widget($args, $instance)
{
// Check if there is a cached output
$cache = wp_cache_get('widget_mem_events_list', 'widget');
if (!is_array($cache)) {
$cache = array();
}
if (!isset($args['widget_id'])) {
$args['widget_id'] = $this->id;
}
if (isset($cache[$args['widget_id']])) {
echo $cache[$args['widget_id']];
return;
}
ob_start();
extract($args);
$title = !empty($instance['title']) ? $instance['title'] : __('Recent Posts');
$title = apply_filters('widget_title', $title, $instance, $this->id_base);
$number = !empty($instance['number']) ? absint($instance['number']) : 5;
if (!$number) {
$number = 5;
}
$age = !empty($instance['age']) ? absint($instance['age']) : 7;
if (!$age) {
$age = 7;
}
$show_date = isset($instance['show_date']) ? $instance['show_date'] : false;
$show_past_events = isset($instance['show_past_events']) ? $instance['show_past_events'] : false;
$post_types = !empty($instance['post_types']) ? $instance['post_types'] : 'post';
$post_types = explode(',', $post_types);
$mem_today = mem_date_of_today();
// user defined age limit. default = 7 days.
$mem_age = $age * DAY_IN_SECONDS;
$mem_age_limit_unix = $mem_today["unix"] - $mem_age;
$mem_age_limit_iso = date("Y-m-d", $mem_age_limit_unix);
// arbitrary six months limit for filtering out old events.
$mem_six_months = 180 * DAY_IN_SECONDS;
$mem_180day_unix = $mem_today["unix"] - $mem_six_months;
$mem_180day_iso = date("Y-m-d", $mem_180day_unix);
$r = new WP_Query(apply_filters('widget_posts_args', array('post_type' => $post_types, 'posts_per_page' => $number, 'meta_key' => '_mem_start_date', 'meta_value' => $mem_180day_iso, 'meta_compare' => '>=', 'orderby' => 'meta_value', 'order' => 'DESC', 'no_found_rows' => true, 'post_status' => 'publish', 'ignore_sticky_posts' => true)));
if ($r->have_posts()) {
// initialize new array to store events
$mem_event_list = array();
?>
<?php
while ($r->have_posts()) {
$r->the_post();
?>
<?php
// add item to array.
// we need:
// 1. start date in iso-format
// 2. date for display (date-num)
// 3. title
// 4. permalink
$mem_event_date = mem_date_processing(get_post_meta(get_the_ID(), '_mem_start_date', true), get_post_meta(get_the_ID(), '_mem_end_date', true));
$mem_event_list[] = array("start-unix" => $mem_event_date["start-unix"], "date-num" => $mem_event_date["date-num"], "title" => get_the_title(), "permalink" => get_permalink());
// check for "Repeat" fields, add them to the list as unique events.
$date_repeats = get_post_meta(get_the_ID(), '_mem_repeat_date', false);
if (!empty($date_repeats)) {
foreach ($date_repeats as $date_repeat) {
// test if the item is fresh enough
if ($date_repeat >= $mem_age_limit_iso) {
// format date
$mem_repeat_date = mem_date_processing($date_repeat, '');
// add item to array
$mem_event_list[] = array("start-unix" => $mem_repeat_date["start-unix"], "date-num" => $mem_repeat_date["date-num"], "title" => get_the_title(), "permalink" => get_permalink());
}
}
}
// end testing for REPEATS
}
// Filtering the $mem_event_list
// 1. filter the dates with $mem_age_limit_unix
$mem_event_list = array_filter($mem_event_list, function ($i) use($mem_age_limit_unix) {
return $i['start-unix'] >= $mem_age_limit_unix;
});
// 2. re-order the dates, based on start-unix
usort($mem_event_list, "mem_custom_sort_iso");
// 3. generate the frontend output
if (!empty($mem_event_list)) {
echo $before_widget;
if ($title) {
echo $before_title . $title . $after_title;
}
echo '<ul>';
foreach ($mem_event_list as $key => $item) {
?>
<li>
<?php
if ($show_date == true) {
echo '<span class="post-date">';
echo $mem_event_list[$key]["date-num"];
echo ' – </span>';
}
?>
<a href="<?php
echo $mem_event_list[$key]["permalink"];
?>
">
<?php
echo $mem_event_list[$key]["title"];
?>
</h4></a>
</li>
<?php
}
echo '</ul>';
echo $after_widget;
}
// Reset the global $the_post as this query will have stomped on it
wp_reset_postdata();
}
$cache[$args['widget_id']] = ob_get_flush();
wp_cache_set('widget_mem_events_list', $cache, 'widget');
}
