Prepare customizable title anonymization (#4)

src/calanonsync/calanonsync.go

@@ -95,11 +95,7 @@ func runSynchronization(cmd *cobra.Command, args []string) {
 	// Find items we don't know so far and create them.
 	for uid, ewsItem := range relevantEWSItems {
 		if _, ok := calDavItemMap[uid]; !ok {
-			title := s.Anonymize.Title
-			if title == "" {
-				// No anonymization? Fine.
-				title = ewsItem.Subject
-			}
+			title := s.Anonymize.Title.Apply(ewsItem.Subject)
 			ical := CreateICal(ewsItem.Hash(), title, ewsItem.Start, ewsItem.End, ewsItem.IsAllDayEvent)
 			calDavItem := CalDAVItem{HRef: uid + ".ics", ICal: ical}
 

src/calanonsync/settings.go

@@ -22,11 +22,16 @@ type ServerSettings struct {
 	Password string
 }
 
+type StringAnonSettings struct {
+	ReplaceWith string
+	Whitelist   []string
+}
+
 type Settings struct {
 	EWS       ServerSettings
 	CalDAV    ServerSettings
 	Anonymize struct {
-		Title string
+		Title *StringAnonSettings
 	}
 }
 
@@ -218,3 +223,11 @@ func runSettingsDecryption(cmd *cobra.Command, args []string) {
 
 	log.Println("Settings decrypted")
 }
+
+func (settings *StringAnonSettings) Apply(s string) string {
+	if settings == nil || settings.ReplaceWith == "" {
+		return s
+	}
+
+	return settings.ReplaceWith
+}

src/calanonsync/settings_test.go

@@ -0,0 +1,23 @@
+package main
+
+import "testing"
+
+func TestStringAnonSettings_Apply(t *testing.T) {
+	t.Run("Not replaced when nil", func(t *testing.T) {
+		title := "Test"
+		var anonTitle *StringAnonSettings = nil
+
+		if anonTitle.Apply(title) != title {
+			t.Fatal("The title should be unchanged.")
+		}
+	})
+
+	t.Run("Not replaced when empty", func(t *testing.T) {
+		title := "Test"
+		var anonTitle *StringAnonSettings = &StringAnonSettings{ReplaceWith: ""}
+
+		if anonTitle.Apply(title) != title {
+			t.Fatal("The title should be unchanged.")
+		}
+	})
+}