From 749cd067da983c4f99d97389981ab6bc6e24e1e5 Mon Sep 17 00:00:00 2001
From: Sli <antoine@bartuccio.fr>
Date: Tue, 16 Dec 2025 17:03:23 +0100
Subject: [PATCH] Add different colors for recurring events on event calendar

---
 .../com/components/ics-calendar-index.ts      | 29 ++++++++++++++++++-
 com/static/com/components/ics-calendar.scss   | 29 ++++++++++++++++++-
 2 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/com/static/bundled/com/components/ics-calendar-index.ts b/com/static/bundled/com/components/ics-calendar-index.ts
index bc2ec9b4..f3af0a18 100644
--- a/com/static/bundled/com/components/ics-calendar-index.ts
+++ b/com/static/bundled/com/components/ics-calendar-index.ts
@@ -1,6 +1,6 @@
 import { makeUrl } from "#core:utils/api";
 import { inheritHtmlElement, registerComponent } from "#core:utils/web-components";
-import { Calendar, type EventClickArg } from "@fullcalendar/core";
+import { Calendar, type EventClickArg, type EventContentArg } from "@fullcalendar/core";
 import type { EventImpl } from "@fullcalendar/core/internal";
 import enLocale from "@fullcalendar/core/locales/en-gb";
 import frLocale from "@fullcalendar/core/locales/fr";
@@ -25,6 +25,11 @@ export class IcsCalendar extends inheritHtmlElement("div") {
   private canDelete = false;
   private helpUrl = "";
 
+  // Hack variable to detect recurring events
+  // The underlying ics library doesn't include any info about rrules
+  // That's why we have to detect those events ourselves
+  private recurrenceMap: Map<string, EventImpl> = new Map();
+
   attributeChangedCallback(name: string, _oldValue?: string, newValue?: string) {
     if (name === "locale") {
       this.locale = newValue;
@@ -95,6 +100,7 @@ export class IcsCalendar extends inheritHtmlElement("div") {
 
   refreshEvents() {
     this.click(); // Remove focus from popup
+    this.recurrenceMap.clear(); // Avoid double detection of the same non recurring event
     this.calendar.refetchEvents();
   }
 
@@ -153,12 +159,24 @@ export class IcsCalendar extends inheritHtmlElement("div") {
   }
 
   async getEventSources() {
+    const tagRecurringEvents = (eventData: EventImpl) => {
+      // This functions tags events with a similar event url
+      // We rely on the fact that the event url is always the same
+      // for recurring events and always different for single events
+      const firstEvent = this.recurrenceMap.get(eventData.url);
+      if (firstEvent !== undefined) {
+        eventData.extendedProps.isRecurring = true;
+        firstEvent.extendedProps.isRecurring = true; // Don't forget the first event
+      }
+      this.recurrenceMap.set(eventData.url, eventData);
+    };
     return [
       {
         url: `${await makeUrl(calendarCalendarInternal)}`,
         format: "ics",
         className: "internal",
         cache: false,
+        eventDataTransform: tagRecurringEvents,
       },
       {
         url: `${await makeUrl(calendarCalendarUnpublished)}`,
@@ -166,6 +184,7 @@ export class IcsCalendar extends inheritHtmlElement("div") {
         color: "red",
         className: "unpublished",
         cache: false,
+        eventDataTransform: tagRecurringEvents,
       },
     ];
   }
@@ -361,6 +380,14 @@ export class IcsCalendar extends inheritHtmlElement("div") {
         event.jsEvent.preventDefault();
         this.createEventDetailPopup(event);
       },
+      eventClassNames: (classNamesEvent: EventContentArg) => {
+        const classes: string[] = [];
+        if (classNamesEvent.event.extendedProps?.isRecurring) {
+          classes.push("recurring");
+        }
+
+        return classes;
+      },
     });
     this.calendar.render();
 
diff --git a/com/static/com/components/ics-calendar.scss b/com/static/com/components/ics-calendar.scss
index 1c0a15bd..74a76397 100644
--- a/com/static/com/components/ics-calendar.scss
+++ b/com/static/com/components/ics-calendar.scss
@@ -18,6 +18,8 @@
   --event-details-border-radius: 4px;
   --event-details-box-shadow: 0px 6px 20px 4px rgb(0 0 0 / 16%);
   --event-details-max-width: 600px;
+  --event-recurring-internal-color: #6f69cd;
+  --event-recurring-unpublished-color: orange;
 }
 
 ics-calendar {
@@ -146,4 +148,29 @@ ics-calendar {
 .tooltip.calendar-copy-tooltip.text-copied {
   opacity: 0;
   transition: opacity 500ms ease-out;
-}
\ No newline at end of file
+}
+
+// We have to override the color set by the lib in the html
+// Hence the !important tag everywhere
+.internal.recurring {
+  .fc-daygrid-event-dot {
+    border-color: var(--event-recurring-internal-color) !important;
+  }
+
+  &.fc-daygrid-block-event {
+    background-color: var(--event-recurring-internal-color) !important;
+    border-color: var(--event-recurring-internal-color) !important;
+  }
+
+}
+
+.unpublished.recurring {
+  .fc-daygrid-event-dot {
+    border-color: var(--event-recurring-unpublished-color) !important;
+  }
+
+  &.fc-daygrid-block-event {
+    background-color: var(--event-recurring-unpublished-color) !important;
+    border-color: var(--event-recurring-unpublished-color) !important;
+  }
+}