mirror of
https://github.com/php/web-php.git
synced 2026-03-23 23:02:13 +01:00
a5d5ab8758
this month and the coming two months, starting from today, so providing information for the future or the past is only an illusion. Only the recurring events are displayed on those pages, so there is no point in serving them.
368 lines
11 KiB
PHP
368 lines
11 KiB
PHP
<?php
|
|
include_once 'prepend.inc';
|
|
|
|
/*
|
|
This script serves three different forms of the calendar data:
|
|
a monthly view ($cm, $cy)
|
|
a daily view ($cm, $cd, $cy)
|
|
an individual item view ($id)
|
|
For the two later, the month view is also displayed beneath the specifically
|
|
asked data. If we encounter an error, we have a fallback to display the
|
|
actual month/year.
|
|
*/
|
|
|
|
$begun = FALSE; $errors = array();
|
|
$id = isset($id) ? (int) $id : 0;
|
|
$cy = isset($cy) ? (int) $cy : 0;
|
|
$cm = isset($cm) ? (int) $cm : 0;
|
|
$cd = isset($cd) ? (int) $cd : 0;
|
|
|
|
// If the year is not valid, set it to the current year
|
|
// This excludes all the "too old", or "too far in the future"
|
|
// calendar displays (so search engines can handle this page too)
|
|
if ($cy != 0 && !valid_year($cy)) {
|
|
$cy = date("Y");
|
|
}
|
|
|
|
// We need to look up an event with an ID
|
|
if ($id) {
|
|
// Try to load event by ID and display header and info for that event
|
|
if ($event = load_event($id)) {
|
|
commonHeader("Event: " . stripslashes(htmlentities($event['sdesc'])));
|
|
display_event($event, 0);
|
|
$begun = TRUE;
|
|
}
|
|
// Unable to find event, put this to the error messages' list
|
|
else {
|
|
$errors[] = "There is no event for specified id ('".htmlentities($id)."')";
|
|
}
|
|
}
|
|
|
|
// Year, month and day specified, display a daily view
|
|
elseif ($cy && $cm && $cd) {
|
|
|
|
// Check if date is valid
|
|
if (checkdate($cm,$cd,$cy)) {
|
|
|
|
// Date integer for that day
|
|
$date = mktime(0, 0, 1, $cm, $cd, $cy);
|
|
|
|
// Try to load events for that day, and display them all
|
|
if ($events = load_events($date)) {
|
|
commonHeader("Events: ".date("F j, Y", $date));
|
|
echo "<h2>", date("F j, Y", $date), "</h2>\n";
|
|
foreach ($events as $event) {
|
|
display_event($event, 0);
|
|
echo "<br />";
|
|
}
|
|
$begun = TRUE;
|
|
}
|
|
|
|
// Unable to load events for that day
|
|
else {
|
|
$errors[] = "There are no events for the specified date (".date("F j, Y",$date).").";
|
|
}
|
|
}
|
|
|
|
// Wrong date specified
|
|
else {
|
|
$errors[] = "The specified date (".htmlentities("$cy/$cm/$cd").") was not valid.";
|
|
unset($cm); unset($cd); unset($cy);
|
|
}
|
|
}
|
|
|
|
// Check if month and year is valid
|
|
if ($cm && $cy && !checkdate($cm,1,$cy)) {
|
|
$errors[] = "The specified year and month (".htmlentities("$cy, $cm").") are not valid.";
|
|
unset($cm); unset($cy);
|
|
}
|
|
|
|
// Give defaults for the month and day values if they were invalid
|
|
if (!isset($cm) || $cm == 0) { $cm = date("m"); }
|
|
if (!isset($cy) || $cy == 0) { $cy = date("Y"); }
|
|
|
|
// Start of the month date
|
|
$date = mktime(0, 0, 1, $cm, 1, $cy);
|
|
|
|
if (!$begun) {
|
|
commonHeader("Events: ".date("F Y", $date));
|
|
?>
|
|
<div class="tip">
|
|
<p>
|
|
If you would like to suggest an upcoming event to be listed on this
|
|
calendar, you can use <a href="submit-event.php">our event submission
|
|
form</a>.
|
|
</p>
|
|
<p>
|
|
You can click on each of the events for details, or on the number for a day
|
|
to get the details for all of the events taking place that day.
|
|
</p>
|
|
</div>
|
|
<?php
|
|
}
|
|
|
|
// Get events list for a whole month
|
|
$events = load_events($date, TRUE);
|
|
|
|
// If there was an error, or there are no events, this is an error
|
|
if ($events === FALSE || count($events) == 0) {
|
|
$errors[] = "No events found for this month";
|
|
}
|
|
|
|
// If there were any error, display them
|
|
if (count($errors) > 0) {
|
|
display_errors($errors);
|
|
commonFooter();
|
|
exit;
|
|
}
|
|
|
|
// Beginning and end of this month
|
|
$bom = mktime(0, 0, 1, $cm, 1, $cy);
|
|
$eom = mktime(0, 0, 1, $cm+1, 0, $cy);
|
|
|
|
// Link to previous month (but do not link to too early dates)
|
|
$lm = mktime(0, 0, 1, $cm, 0, $cy);
|
|
if (valid_year(date("Y", $lm))) {
|
|
$prev_link = '<a href="' . $PHP_SELF . strftime('?cm=%m&cy=%Y">%B, %Y</a>', $lm);
|
|
} else {
|
|
$prev_link = ' ';
|
|
}
|
|
|
|
// Link to next month (but do not link to too early dates)
|
|
$nm = mktime(0, 0, 1, $cm+1, 1, $cy);
|
|
if (valid_year(date("Y", $nm))) {
|
|
$next_link = '<a href="' . $PHP_SELF . strftime('?cm=%m&cy=%Y">%B, %Y</a>', $nm);
|
|
} else {
|
|
$next_link = ' ';
|
|
}
|
|
|
|
// Print out navigation links for previous and next month
|
|
echo '<br /><table bgcolor="#d0d0d0" width="100%" border="0" cellspacing="0" cellpadding="3">',
|
|
"\n<tr>", '<td align="left" width="33%">', $prev_link, '</td>',
|
|
'<td align="center" width="33%">', strftime('<b>%B, %Y</b></td>', $bom),
|
|
'<td align="right" width="33%">', $next_link, "</td></tr>\n</table>\n";
|
|
|
|
// Begin the calendar table
|
|
echo '<table id="cal" bgcolor="#f0f0f0" width="100%" border="1" cellspacing="0" cellpadding="3">',
|
|
"\n",'<tr bgcolor="#a0a0a0">',"\n";
|
|
|
|
// Print out headers for weekdays
|
|
for ($i = 0; $i < 7; $i++) {
|
|
echo '<th width="14%">', date("l",mktime(0,0,1,4,$i+1,2001)), "</th>\n";
|
|
}
|
|
echo "</tr>\n<tr>";
|
|
|
|
// Generate the requisite number of blank days to get things started
|
|
for ($days = $i = date("w",$bom); $i > 0; $i--) {
|
|
echo '<td bgcolor="#d0d0d0"> </td>';
|
|
}
|
|
|
|
// Print out all the days in this month
|
|
for ($i = 1; $i <= date("t",$bom); $i++) {
|
|
|
|
// Print out day number and all events for the day
|
|
echo '<td valign="top"><a class="day" href="',
|
|
$PHP_SELF, "?cm=$cm&cd=$i&cy=$cy",
|
|
'">',$i,'</a>';
|
|
display_events_for_day(date("Y-m-",$bom).sprintf("%02d",$i), $events);
|
|
echo '</td>';
|
|
|
|
// Break HTML table row if at end of week
|
|
if (++$days % 7 == 0) echo "</tr>\n<tr>";
|
|
}
|
|
|
|
// Generate the requisite number of blank days to wrap things up
|
|
for (; $days % 7; $days++) {
|
|
echo '<td bgcolor="#d0d0d0"> </td>';
|
|
}
|
|
|
|
// End HTML table of events
|
|
echo "</tr>\n</table>\n";
|
|
|
|
// Print out common footer
|
|
commonFooter();
|
|
|
|
// Generate the date on which a recurring event falls for a given month
|
|
// $bom and $eom are the first and last day of the month to look at
|
|
function date_for_recur($recur, $day, $bom, $eom)
|
|
{
|
|
|
|
// $day == 1 == 'Sunday' == date("w",'some sunday')+1
|
|
|
|
// ${recur}th $day of the month
|
|
if ($recur > 0) {
|
|
$bomd = date("w", $bom) + 1;
|
|
$days = (($day - $bomd + 7) % 7) + (($recur - 1) * 7);
|
|
return mktime(0,0,1, date("m",$bom), $days + 1, date("Y",$bom));
|
|
}
|
|
|
|
// ${recur}th to last $day of the month
|
|
else {
|
|
$eomd = date("w",$eom) + 1;
|
|
$days = (($eomd - $day + 7) % 7) + ((abs($recur) - 1) * 7);
|
|
return mktime(0,0,1, date("m",$bom)+1, -$days, date("Y",$bom));
|
|
}
|
|
}
|
|
|
|
// Display a <div> for each of the events that are on a given day
|
|
function display_events_for_day($day, $events)
|
|
{
|
|
|
|
// For preservation of state in the links
|
|
global $PHP_SELF, $cm, $cy;
|
|
|
|
// For all events, try to find the events for this day
|
|
foreach ($events as $event) {
|
|
|
|
// Multiday event, which still lasts, or the event starts today
|
|
if (($event['type'] == 2 && $event['start'] <= $day && $event['end'] >= $day)
|
|
|| ($event['start'] == $day)) {
|
|
echo '<div class="event">',
|
|
'<a href="',$PHP_SELF,"?id=$event[id]&cm=$cm&cy=$cy",'">',
|
|
stripslashes(htmlentities($event['sdesc'])),
|
|
'</a></div>';
|
|
}
|
|
}
|
|
}
|
|
|
|
// Find a single event in the events file by ID
|
|
function load_event($id)
|
|
{
|
|
// Open events CSV file, return on error
|
|
$fp = @fopen("backend/events.csv",'r');
|
|
if (!$fp) { return FALSE; }
|
|
|
|
// Read as we can, event by event
|
|
while (!feof($fp)) {
|
|
|
|
$event = read_event($fp);
|
|
|
|
// Return with the event, if it's ID is the one
|
|
// we search for (also close the file)
|
|
if ($event !== FALSE && $event['id'] == $id) {
|
|
fclose($fp);
|
|
return $event;
|
|
}
|
|
}
|
|
|
|
// Close file, and return sign of failure
|
|
fclose($fp);
|
|
return FALSE;
|
|
}
|
|
|
|
// Load a list of events. Either for a particular day ($from) or a whole
|
|
// month (if second parameter specified with TRUE)
|
|
function load_events($from, $whole_month = FALSE)
|
|
{
|
|
// Take advantage of the equality behavior of this date format
|
|
$from_date = date("Y-m-d", $from);
|
|
$bom = mktime(0, 0, 1, date("m",$from), 1, date("Y",$from));
|
|
$eom = mktime(0, 0, 1, date("m",$from) + 1, 0, date("Y",$from));
|
|
$to_date = date("Y-m-d", $whole_month ? $eom : $from);
|
|
|
|
// Set arrays to their default
|
|
$events = $seen = array();
|
|
|
|
// Try to open the events file for reading, return if unable to
|
|
$fp = @fopen("backend/events.csv",'r');
|
|
if (!$fp) { return FALSE; }
|
|
|
|
// For all events, read in the event and check it if fits our scope
|
|
while (!feof($fp)) {
|
|
|
|
// Read the event data into $event, or continue with next
|
|
// line, if there was an error with this line
|
|
if (($event = read_event($fp)) === FALSE) {
|
|
continue;
|
|
}
|
|
|
|
// Keep event's seen list up to date
|
|
// (for repeating events with the same ID)
|
|
if (!isset($seen[$event['id']])) { $seen[$event['id']] = 1; }
|
|
else { continue; }
|
|
|
|
// Check if event is in our scope, depending on type
|
|
switch ($event['type']) {
|
|
|
|
// Recurring event
|
|
case 3:
|
|
$date = date_for_recur($event['recur'], $event['recur_day'], $bom, $eom);
|
|
$event['start'] = date("Y-m-d", $date);
|
|
// Fall through. Now it is just like a single-day event
|
|
|
|
// Single-day event
|
|
case 1:
|
|
if ($event['start'] >= $from_date && $event['start'] <= $to_date) {
|
|
$events[] = $event;
|
|
}
|
|
break;
|
|
|
|
// Multi-day event
|
|
case 2:
|
|
if (($event['start'] >= $from_date && $event['start'] <= $to_date)
|
|
|| ($event['end'] >= $from_date && $event['end'] <= $to_date)
|
|
|| ($event['start'] <= $from_date && $event['end'] >= $to_date)) {
|
|
$events[] = $event;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Close file and return with results
|
|
fclose($fp);
|
|
return $events;
|
|
}
|
|
|
|
// Reads an event from the event listing
|
|
// Parameter: opened event listing file
|
|
function read_event($fp)
|
|
{
|
|
// We were unable to read a line from the file, return
|
|
if (($linearr = fgetcsv($fp, 8192)) === FALSE) {
|
|
return FALSE;
|
|
}
|
|
|
|
// Corrupt line in CSV file
|
|
if (count($linearr) < 12) { return FALSE; }
|
|
|
|
// Put the array elements into variables
|
|
list(
|
|
, , , ,
|
|
$sdesc, $id, $ldesc, $url, $recur, $tipo, $sdato, $edato
|
|
) = $linearr;
|
|
|
|
// Get info on recurring event
|
|
@list($recur, $recur_day) = explode(":", $recur, 2);
|
|
|
|
// Return with SQL-resultset like array
|
|
return array(
|
|
'id' => $id,
|
|
'type' => $tipo,
|
|
'start' => $sdato,
|
|
'end' => $edato,
|
|
'recur' => $recur,
|
|
'recur_day' => $recur_day,
|
|
'sdesc' => $sdesc,
|
|
'url' => $url,
|
|
'ldesc' => base64_decode($ldesc),
|
|
);
|
|
}
|
|
|
|
// We would not like to allow any year to be viewed, because
|
|
// it would fool some [not clever enough] search engines
|
|
function valid_year($year)
|
|
{
|
|
// Get current year and compare to one sent in
|
|
$current_year = date("Y");
|
|
|
|
// We only allow this year for displays
|
|
if ($year != $current_year) {
|
|
return FALSE;
|
|
}
|
|
|
|
// The year is all right
|
|
return TRUE;
|
|
}
|
|
|
|
?>
|