feat:#7 extracted ical-service in own microservice

backend-ical/service/ical/ical.go

@@ -0,0 +1,55 @@
+package ical
+
+import (
+	"bytes"
+	"github.com/jordic/goics"
+	"htwkalender-ical/model"
+	"htwkalender-ical/service/connector"
+	"time"
+)
+
+const expirationTime = 5 * time.Minute
+
+func Feed(token string) (string, error) {
+	// get feed by token
+	feed, err := connector.GetFeedByToken(token)
+	if err != nil {
+		return "", err
+	}
+
+	var events model.Events
+
+	for _, module := range feed.Modules {
+		moduleWithEvents, err := connector.GetModuleWithEvents(module)
+		if err != nil {
+			return "", err
+		}
+
+		events = append(events, moduleWithEvents.Events...)
+	}
+
+	// Sorte events by start date
+	events.Sort()
+
+	modules := make(map[string]model.FeedCollection)
+	for _, module := range feed.Modules {
+		modules[module.UUID] = model.FeedCollection(module)
+	}
+
+	b := bytes.Buffer{}
+	goics.NewICalEncode(&b).Encode(IcalModel{Events: events, Mapping: modules})
+	icalFeed := &model.FeedModel{Content: b.String(), ExpiresAt: model.JSONTime(time.Now().Add(expirationTime))}
+
+	return icalFeed.Content, nil
+}
+
+func FeedRecord(token string) (model.FeedRecord, error) {
+
+	feedRecord, err := connector.GetFeedByToken(token)
+	if err != nil {
+		return model.FeedRecord{}, err
+	}
+
+	return feedRecord, nil
+
+}