From 7e19179fcca5c96065e0f9693cb74f62ec3d1331 Mon Sep 17 00:00:00 2001
From: khuxkm fbexl <khuxkm@ttm.sh>
Date: Sat, 26 Sep 2020 19:23:48 +0000
Subject: [PATCH] Fix duplication of ICS events and make TTT only show up on
 the last Sunday of each month

---
 schedule/ics.php | 66 +++++++++++++++++++++++++++++-------------------
 1 file changed, 40 insertions(+), 26 deletions(-)

diff --git a/schedule/ics.php b/schedule/ics.php
index 2b09bae..fca7d62 100644
--- a/schedule/ics.php
+++ b/schedule/ics.php
@@ -1,6 +1,4 @@
 <?php
-$from = gmdate("Y-m-d\T00:00:00\Z", strtotime(date("w") ? "last sunday" : "sunday"));
-$to   = gmdate("Y-m-d\T00:00:00\Z", strtotime("2 days ago",strtotime(date("w") ? "sunday" : "next sunday")));
 include 'schedule.php';
 
 function ics_formatdate($date) {
@@ -24,31 +22,47 @@ echo "VERSION:2.0".ICS_EOL;
 echo "PRODID:tilderadio schedule".ICS_EOL;
 echo "DTSTAMP:".ics_formatdate("now").ICS_EOL;
 
+// A list of event IDs that we have on the calendar, to avoid duplication
+$event_ids = array();
+
 foreach ($schedule as $event) {
-	// The VEVENT structure's pretty easy to generate, especially since we're already in UTC.
-	echo "BEGIN:VEVENT".ICS_EOL;
-	// First, we need a creation date.
-	// Just go with now.
-	echo "DTSTAMP:".ics_formatdate("now").ICS_EOL;
-	// Next, the event start and end.
-	echo "DTEND:".ics_formatdate($event["end"]).ICS_EOL;
-	echo "DTSTART:".ics_formatdate($event["start"]).ICS_EOL;
-	// Next, the recurrence rule.
-	// We assume the format is weekly. (No DJs have requested any other frequency yet.)
-	echo "RRULE:FREQ=WEEKLY".ICS_EOL;
-	// Next, the event title, or "summary" as the spec calls it.
-	echo "SUMMARY:DJ ".$event["title"].ICS_EOL;
-	// Finally, a unique ID for this event.
-	// To make absolutely certain we don't repeat the same event ID, I decided to use a SHA256 hash of the event structure.
-	echo "UID:";
-	echo hash("sha256",json_encode($event));
-	// to avoid the validator complaining about lines longer than 75 characters, split after the hash
-	echo ICS_EOL." ";
-	// Now finish the address UID
-	echo "@tilderadio.org".ICS_EOL;
-	// Finally, close the VEVENT structure.
-	echo "END:VEVENT".ICS_EOL;
-	// Next event?
+	if (!in_array($event["id"],$event_ids)){
+		array_push($event_ids,$event["id"]);
+		// The VEVENT structure's pretty easy to generate, especially since we're already in UTC.
+		echo "BEGIN:VEVENT".ICS_EOL;
+		// First, we need a creation date.
+		// Just go with now.
+		echo "DTSTAMP:".ics_formatdate("now").ICS_EOL;
+		// Next, the event start and end.
+		echo "DTEND:".ics_formatdate($event["end"]).ICS_EOL;
+		echo "DTSTART:".ics_formatdate($event["start"]).ICS_EOL;
+		// Next, the recurrence rule.
+		if ($event["title"]!="tomasino") {
+			// We assume the format is weekly. (tomasino is the only DJ to have requested any other frequency.)
+			echo "RRULE:FREQ=WEEKLY".ICS_EOL;
+		} else {
+			// TTT only comes on the last Sunday of the month, 23:30:00 UTC to 01:00:00 UTC
+			if (gmdate("His",strtotime($event["start"]))=="233000" && gmdate("His",strtotime($event["end"]))=="010000") {
+				echo "RRULE:FREQ=MONTHLY;WKST=SU;BYDAY=SU;BYSETPOS=-1".ICS_EOL;
+			} else {
+				// his other shows are weekly though
+				echo "RRULE:FREQ=WEEKLY".ICS_EOL;
+			}
+		}
+		// Next, the event title, or "summary" as the spec calls it.
+		echo "SUMMARY:DJ ".$event["title"].ICS_EOL;
+		// Finally, a unique ID for this event.
+		// To make absolutely certain we don't repeat the same event ID, I decided to use a SHA256 hash of the event structure.
+		echo "UID:";
+		echo hash("sha256",json_encode($event));
+		// to avoid the validator complaining about lines longer than 75 characters, split after the hash
+		echo ICS_EOL." ";
+		// Now finish the address UID
+		echo "@tilderadio.org".ICS_EOL;
+		// Finally, close the VEVENT structure.
+		echo "END:VEVENT".ICS_EOL;
+		// Next event?
+	}
 }
 
 // Finally, close out the VCALENDAR structure.