Widget:ICSGenerator: Difference between revisions

Revision as of 18:17, 17 February 2022

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Creates a download link for an ICS file (event date container).

Template parameters
This template prefers inline formatting of parameters.
Parameter		Description	Type	Status
Title of the event	`title`	The general title of the event. This is the text that will be shown in a calendar. Keep it short. Example Shattered Connexion	String	required
Event start	`start`	The start date of the event. Example 2021-08-12T04:00:00+07	Date	required
Event end	`end`	The ending of the event. Example 2021-08-26T10:00:00+07	Date	required

See the widget's testcases:

Test with given full date definition
Wiki code	{{#widget:ICSGenerator \|title=Name of the event \|start=20220218T194956 \|end=20220218T195956}}
Main version
Sandbox version	(no sandbox subpage)

Test with short date definition
Wiki code	{{#widget:ICSGenerator \|title=Name of the event \|start=20220218T194956 \|end=20220218T195956}}
Main version
Sandbox version	(no sandbox subpage)

@@ Line 1: / Line 1: @@
-<includeonly><span class="ics-container"><script>function buildIcsLink(name, start, end) {
+<includeonly><span class="ics-container"><script>/* Hashing as seen on https://stackoverflow.com/a/52171480 */
+var cyrb53 = function(str, seedRaw) {
+    var seed = seedRaw || 0;
+    var h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
+    for (var i = 0, ch; i < str.length; i++) {
+        ch = str.charCodeAt(i);
+        h1 = Math.imul(h1 ^ ch, 2654435761);
+        h2 = Math.imul(h2 ^ ch, 1597334677);
+    }
+    h1 = Math.imul(h1 ^ (h1>>>16), 2246822507) ^ Math.imul(h2 ^ (h2>>>13), 3266489909);
+    h2 = Math.imul(h2 ^ (h2>>>16), 2246822507) ^ Math.imul(h1 ^ (h1>>>13), 3266489909);
+    return 4294967296 * (2097151 & h2) + (h1>>>0);
+};
+function buildIcsLink(name, start, end) {
 	var currentTime = new Date().toISOString();
+	var hash = cyrb53("" + name + start + end);
 	var icsContent = "BEGIN:VCALENDAR\r\n";
 	icsContent += "VERSION:2.0\r\n";
@@ Line 8: / Line 24: @@
 	icsContent += "BEGIN:VEVENT\r\n";
 	icsContent += "DTSTAMP:" + currentTime + "\r\n";
-	icsContent += "UID:[email protected]\r\n";
+	icsContent += "UID:" + hash + "\r\n";
 	icsContent += "DTSTART;TZID=/Etc/UTC:" + start + "\r\n";
 	icsContent += "DTEND;TZID=/Etc/UTC:" + end + "\r\n";