Tweak calendar events

scripts/sync-working-groups/sync-working-groups.ts

@@ -56,7 +56,6 @@ async function main() {
   const existingMeetings = await readExistingMeetings()
   console.log(`Found ${existingMeetings.length} existing event(s) in file`)
 
-  const lastMeetingStart = existingMeetings.at(-1)?.start ?? null
   const cutoffDate = new Date(
     now.getTime() - DAYS_TO_KEEP * 24 * 60 * 60 * 1000,
   )
@@ -68,12 +67,9 @@ async function main() {
     maxResults: "250",
   })
 
-  const timeMin =
-    lastMeetingStart !== null && lastMeetingStart !== undefined
-      ? new Date(Math.min(Date.parse(lastMeetingStart), now.getTime()))
-      : new Date(now.getTime() - DAYS_BACK * 24 * 60 * 60 * 1000)
-
+  const timeMin = new Date(now.getTime() - DAYS_BACK * 24 * 60 * 60 * 1000)
   const timeMax = new Date(now.getTime() + DAYS_AHEAD * 24 * 60 * 60 * 1000)
+
   searchParams.set("timeMin", timeMin.toISOString())
   searchParams.set("timeMax", timeMax.toISOString())
   console.log(
@@ -138,14 +134,11 @@ async function main() {
     `Fetched ${newMeetings.length} event(s) from API (${newCount} new)`,
   )
 
-  const allMeetings = mergeMeetings(existingMeetings, newMeetings)
+  const allMeetings = mergeMeetings(existingMeetings, newMeetings, timeMin)
   const netChange = allMeetings.length - existingMeetings.length
 
-  if (netChange > 0) {
-    console.log(`Added ${netChange} new event(s)`)
-  } else if (netChange < 0) {
-    console.log(`Removed ${Math.abs(netChange)} event(s)`)
-  }
+  console.log(`Net change: ${(netChange > 0 ? "+" : "") + netChange} event(s)`)
+
   const cutoffDateStr = cutoffDate.toISOString().split("T")[0]
   const futureLimit = new Date(now.getTime() + DAYS_AHEAD * 24 * 60 * 60 * 1000)
   const futureLimitStr = futureLimit.toISOString().split("T")[0]
@@ -193,20 +186,33 @@ async function readExistingMeetings(): Promise<WorkingGroupMeeting[]> {
 function mergeMeetings(
   existing: WorkingGroupMeeting[],
   incoming: WorkingGroupMeeting[],
+  checkForDeletionsAfter: Date,
 ): WorkingGroupMeeting[] {
+  const toDelete = new Set<string>()
   const byId = new Map<string, WorkingGroupMeeting>()
 
   for (const meeting of existing) {
     byId.set(meeting.id, meeting)
+    if (Date.parse(meeting.start) > +checkForDeletionsAfter) {
+      toDelete.add(meeting.id)
+    }
   }
 
   for (const meeting of incoming) {
+    toDelete.delete(meeting.id)
     const existing = byId.get(meeting.id)
     if (!existing || meeting.updated > existing.updated) {
       byId.set(meeting.id, meeting)
     }
   }
 
+  if (toDelete.size) {
+    console.log(`Deleted ${toDelete.size} event(s)`)
+  }
+  for (const id of toDelete) {
+    byId.delete(id)
+  }
+
   return Array.from(byId.values())
 }