Fix caldav url not containing the api url if the frontend and api are on the same domain

src/views/user/Settings.vue

@@ -299,8 +299,6 @@ export default {
 			totpDisableForm: false,
 			totpDisablePassword: '',
 
-			caldavUrl: '',
-
 			settings: UserSettingsModel,
 			userSettingsService: UserSettingsService,
 		}
@@ -325,17 +323,29 @@ export default {
 		})
 
 		this.totpStatus()
-		this.buildCaldavUrl()
 	},
 	mounted() {
 		this.setTitle('Settings')
 	},
-	computed: mapState({
+	computed: {
+		caldavUrl() {
+			let apiBase = window.API_URL.replace('/api/v1', '')
+			if (apiBase === '') { // Frontend and api on the same host which means we need to prefix the frontend url
+				apiBase = this.$store.state.config.frontendUrl
+			}
+			if (apiBase.endsWith('/')) {
+				apiBase = apiBase.substr(0, apiBase.length - 1)
+			}
+
+			return `${apiBase}/dav/principals/${this.userInfo.username}/`
+		},
+		...mapState({
 			totpEnabled: state => state.config.totpEnabled,
 			migratorsEnabled: state => state.config.availableMigrators !== null && state.config.availableMigrators.length > 0,
 			caldavEnabled: state => state.config.caldavEnabled,
 			userInfo: state => state.auth.info,
-	}),
+		})
+	},
 	methods: {
 		updatePassword() {
 			if (this.passwordConfirm !== this.passwordUpdate.newPassword) {
@@ -416,10 +426,6 @@ export default {
 				})
 				.catch(e => this.error(e, this))
 		},
-		buildCaldavUrl() {
-			const apiBase = window.API_URL.replace('/api/v1', '')
-			this.caldavUrl = `${apiBase}/dav/principals/${this.userInfo.username}/`
-		},
 		copy(text) {
 			copy(text)
 		},