add choice of a start date for a project

src/views/NewEditProjectView.vue

@@ -64,6 +64,23 @@
       class="block w-full rounded border border-slate-400 mb-4 px-3 py-2"
     />
 
+    <div class="flex mb-4 columns-3 w-full">
+      <input
+        v-model="startDateInput"
+        placeholder="Start Date"
+        type="date"
+        class="col-span-1 w-full rounded border border-slate-400 px-3 py-2"
+      />
+      <input
+        :disabled="!startDateInput"
+        v-model="startTimeInput"
+        placeholder="Start Time"
+        type="time"
+        class="col-span-1 w-full rounded border border-slate-400 ml-2 px-3 py-2"
+      />
+      <span class="col-span-1 w-full flex justify-center">{{ zoneName }}</span>
+    </div>
+
     <div class="flex items-center mb-4">
       <input
         type="checkbox"
@@ -137,6 +154,7 @@
 import "leaflet/dist/leaflet.css";
 import { AxiosError } from "axios";
 import * as didJwt from "did-jwt";
+import { DateTime } from "luxon";
 import { Component, Vue } from "vue-facing-decorator";
 import { LMap, LMarker, LTileLayer } from "@vue-leaflet/vue-leaflet";
 
@@ -174,6 +192,9 @@ export default class NewEditProjectView extends Vue {
   numAccounts = 0;
   projectId = localStorage.getItem("projectId") || "";
   projectIssuerDid = "";
+  startDateInput?: string;
+  startTimeInput?: string;
+  zoneName = DateTime.local().zoneName;
   zoom = 2;
 
   async beforeCreate() {
@@ -252,6 +273,13 @@ export default class NewEditProjectView extends Vue {
         if (this.fullClaim?.agent?.identifier) {
           this.agentDid = this.fullClaim.agent.identifier;
         }
+        if (this.fullClaim.startTime) {
+          const localDateTime = DateTime.fromISO(
+            this.fullClaim.startTime as string,
+          ).toLocal();
+          this.startDateInput = localDateTime.toFormat("yyyy-MM-dd");
+          this.startTimeInput = localDateTime.toFormat("HH:mm");
+        }
       }
     } catch (error) {
       console.error("Got error retrieving that project", error);
@@ -282,6 +310,28 @@ export default class NewEditProjectView extends Vue {
     } else {
       delete vcClaim.location;
     }
+    if (this.startDateInput) {
+      try {
+        const startTimeFull = this.startTimeInput || "00:00:00";
+        const fullTimeString = this.startDateInput + " " + startTimeFull;
+        // throw an error on an invalid date or time string
+        vcClaim.startTime = new Date(fullTimeString).toISOString(); // ensure timezone is part of it
+      } catch {
+        // it's not a valid date so erase it and tell the user
+        delete vcClaim.startTime;
+        this.$notify(
+          {
+            group: "alert",
+            type: "danger",
+            title: "Error",
+            text: "The date was invalid so it was not set.",
+          },
+          5000,
+        );
+      }
+    } else {
+      delete vcClaim.startTime;
+    }
     // Make a payload for the claim
     const vcPayload = {
       vc: {