From 8eafc9dd2de8b23db9e85df8f403e779326b9369 Mon Sep 17 00:00:00 2001
From: Elmar Kresse <18119527+masterElmar@users.noreply.github.com>
Date: Wed, 18 Oct 2023 18:30:42 +0200
Subject: [PATCH] added batch sized of 100 modules for ical event requests

---
 backend/service/db/dbEvents.go                | 26 ++++++++++++++-----
 .../fetch/fetchSeminarEventService_test.go    |  1 -
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/backend/service/db/dbEvents.go b/backend/service/db/dbEvents.go
index 8e58eb8..f763260 100644
--- a/backend/service/db/dbEvents.go
+++ b/backend/service/db/dbEvents.go
@@ -116,15 +116,27 @@ func buildIcalQueryForModules(modules []model.FeedCollection) dbx.Expression {
 // used for the ical feed
 func GetPlanForModules(app *pocketbase.PocketBase, modules []model.FeedCollection) model.Events {
 
-	var selectedModulesQuery = buildIcalQueryForModules(modules)
-
 	var events model.Events
-	// get all events from event records in the events collection
-	err := app.Dao().DB().Select("*").From("events").Where(selectedModulesQuery).All(&events)
-	if err != nil {
-		print("Error while getting events from database: ", err)
-		return nil
+
+	// iterate over modules in 100 batch sizes
+	for i := 0; i < len(modules); i += 100 {
+		var moduleBatch []model.FeedCollection
+
+		if i+100 > len(modules) {
+			moduleBatch = modules[i:]
+		} else {
+			moduleBatch = modules[i : i+100]
+		}
+
+		var selectedModulesQuery = buildIcalQueryForModules(moduleBatch)
+		// get all events from event records in the events collection
+		err := app.Dao().DB().Select("*").From("events").Where(selectedModulesQuery).All(&events)
+		if err != nil {
+			print("Error while getting events from database: ", err)
+			return nil
+		}
 	}
+
 	return events
 }
 
diff --git a/backend/service/fetch/fetchSeminarEventService_test.go b/backend/service/fetch/fetchSeminarEventService_test.go
index b3d95d4..3284402 100644
--- a/backend/service/fetch/fetchSeminarEventService_test.go
+++ b/backend/service/fetch/fetchSeminarEventService_test.go
@@ -16,7 +16,6 @@ func Test_extractSemesterAndYear(t *testing.T) {
 		want  string
 		want1 string
 	}{
-		// TODO: Add test cases.
 		{
 			name: "Test 1",
 			args: args{