add repeating event exclusion support to api endpoints

Author: devksingh4

src/api/routes/events.ts

@@ -57,6 +57,7 @@ const createProjectionParams = (includeMetadata: boolean = false) => {
     id: "#id",
     repeats: "#repeats",
     repeatEnds: "#repeatEnds",
+    excludeDates: "#excludeDates",
     ...(includeMetadata ? { metadata: "#metadata" } : {}),
   };
 
@@ -123,14 +124,19 @@ const baseSchema = z.object({
 const requestSchema = baseSchema.extend({
   repeats: z.optional(z.enum(repeatOptions)),
   repeatEnds: z.string().optional(),
+  repeatExcludes: z.array(z.string().date()).optional().openapi({
+    description:
+      "Dates to exclude from recurrence rules (in the America/Chicago timezone).",
+  }),
 });
 
-const postRequestSchema = requestSchema.refine(
-  (data) => (data.repeatEnds ? data.repeats !== undefined : true),
-  {
+const postRequestSchema = requestSchema
+  .refine((data) => (data.repeatEnds ? data.repeats !== undefined : true), {
     message: "repeats is required when repeatEnds is defined",
-  },
-);
+  })
+  .refine((data) => (data.repeatExcludes ? data.repeats !== undefined : true), {
+    message: "repeats is required when repeatExcludes is defined",
+  });
 export type EventPostRequest = z.infer<typeof postRequestSchema>;
 
 const getEventSchema = requestSchema.extend({

src/api/routes/ics.ts

@@ -155,15 +155,29 @@ const icalPlugin: FastifyPluginAsync = async (fastify, _options) => {
         });
 
         if (rawEvent.repeats) {
+          const startTime = moment.tz(rawEvent.start, "America/Chicago");
+          const hours = startTime.hours();
+          const minutes = startTime.minutes();
+          const seconds = startTime.seconds();
+          const milliseconds = startTime.milliseconds();
+          const exclusions = ((rawEvent.repeatExcludes as string[]) || []).map(
+            (x) =>
+              moment
+                .tz(x, "America/Chicago")
+                .set({ hours, minutes, seconds, milliseconds }),
+          );
+
           if (rawEvent.repeatEnds) {
             event = event.repeating({
               ...repeatingIcalMap[rawEvent.repeats as EventRepeatOptions],
               until: moment.tz(rawEvent.repeatEnds, "America/Chicago"),
+              exclude: exclusions,
             });
           } else {
-            event.repeating(
-              repeatingIcalMap[rawEvent.repeats as EventRepeatOptions],
-            );
+            event.repeating({
+              ...repeatingIcalMap[rawEvent.repeats as EventRepeatOptions],
+              exclude: exclusions,
+            });
           }
         }
         if (rawEvent.location) {