src/*: use type daterange for timeframes

Instead of to and from, no type dataRange is used.
Type DateRange still has to and from.

src/datasources/db/lendingstationAPI.ts

@@ -183,10 +183,7 @@ export class LendingStationAPI extends DataSource {
 
     async createTimeFrame (timeFrame: any) {
         return await this.connection.transaction(async (entityManager: EntityManager) => {
-            if (timeFrame.to === undefined) {
-                timeFrame.to = '';
-            }
-            timeFrame.dateRange = '[' + timeFrame.from + ',' + timeFrame.to + ')';
+            genDateRange(timeFrame);
             // checking for overlapping time frames
             const overlapping = await entityManager.getRepository(TimeFrame)
                 .createQueryBuilder('timeframe')

src/datasources/db/utils.ts

@@ -23,16 +23,15 @@ import { ActionLog, Actions } from '../../model/ActionLog';
 import { UserInputError } from 'apollo-server-express';
 
 export function genDateRange (struct: any) {
-    if (struct.to === undefined) {
-        struct.to = '';
-    }
-    struct.dateRange = '[' + struct.from + ',' + struct.to + ')';
-    if (struct.from === undefined) {
+    if (!struct.dateRange || !struct.dateRange.from) {
         delete struct.dateRange;
+        return;
+    } else if (!struct.dateRange?.to) {
+        struct.dateRange.to = '';
+    } else if (struct.dateRange.to === struct.dateRange.from) {
+        throw new UserInputError('Date Range can not be empty, provide different dates.');
     }
-    // delete these keys, so the struct can be used to update the engagement entity
-    delete struct.from;
-    delete struct.to;
+    struct.dateRange = '[' + struct.dateRange.from + ',' + struct.dateRange.to + ')';
 }
 
 /**

src/resolvers/lendingStationResolvers.ts

@@ -104,14 +104,16 @@ export default {
             return parent.loanTimes ? parent.loanTimes : [];
         }
     },
-    TimeFrame: {
+    DateRange: {
         from (parent: any) {
-            return (parent.dateRange as string).split(',')[0].replace('[', '');
+            return (parent as string).split(',')[0].replace('[', '');
         },
-        to (parent: any) {
-            const str = (parent.dateRange as string).split(',')[1].replace(')', '');
+        to (parent: string) {
+            const str = (parent as string).split(',')[1].replace(')', '');
             return (str.length > 0) ? str : null;
+        }
     },
+    TimeFrame: {
         cargoBike (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadBike)) {
                 return dataSources.cargoBikeAPI.cargoBikeByTimeFrameId(parent.id);

src/schema/type-defs.ts

@@ -935,13 +935,26 @@ export default gql`
         loanTimes: [String!]
     }
 
-    "(dt. Zeitscheibe) When was a bike where"
-    type TimeFrame {
-        id: ID!
-        "format YYYY-MM-dd"
+    type DateRange{
         from: Date!
+        "will be infinity of not omitted"
+        to: Date
+    }
+    
+    input DateRangeInput {
         "format YYYY-MM-dd"
+        from: Date!
+        """
+        format YYYY-MM-dd
+        will be infinity of not omitted
+        """
         to: Date
+    }
+    
+    "(dt. Zeitscheibe) When was a bike where"
+    type TimeFrame {
+        id: ID!
+        dateRange: DateRange!
         note: String
         lendingStation: LendingStation!
         cargoBike: CargoBike!
@@ -953,8 +966,7 @@ export default gql`
     }
 
     input TimeFrameCreateInput {
-        from: Date!
-        to: Date
+        dateRange: DateRangeInput!
         note: String
         lendingStationId: ID!
         cargoBikeId: ID!
@@ -962,8 +974,7 @@ export default gql`
 
     input TimeFrameUpdateInput {
         id: ID!
-        from: Date
-        to: Date
+        dateRange: DateRangeInput
         note: String
         lendingStationId: ID
         cargoBikeId: ID