feature: add store for tracking network request to API

lib/frontend/records/index.js

@@ -0,0 +1,5 @@
+import Request from './request'
+
+export {
+  Request,
+}

lib/frontend/records/request.js

@@ -0,0 +1,9 @@
+export default class Request {
+  constructor({
+    id,
+    error,
+  }) {
+    this.id = id
+    this.error = error
+  }
+}

lib/frontend/stores/index.js

@@ -1,7 +1,9 @@
 import configStore from './configStore'
 import eventStore from './eventStore'
+import requestStore from './requestStore'
 
 export {
   configStore,
   eventStore,
+  requestStore,
 }

lib/frontend/stores/requestStore.js

@@ -0,0 +1,3 @@
+import { writable } from 'svelte/store'
+
+export default writable(null)

lib/static/index.js

@@ -9,8 +9,16 @@ import { extractEventDataFromHTML } from '../../lib/services/ics-retriever'
 import generateICS from '../../lib/services/ics-generator'
 
 import boot from '../frontend'
+import { requestStore } from '../frontend/stores'
+import { Request } from '../frontend/records'
 
 (() => {
+  let request = null
+
+  requestStore.subscribe((updatedRequest) => {
+    request = updatedRequest
+  })
+
   document.addEventListener('DOMContentLoaded', boot)
 
   const createRecord = (uri, summary, startTime) => {
@@ -73,17 +81,29 @@ import boot from '../frontend'
     input.disabled = true
     submitButton.disabled = true
     setStatusDownloading()
+
+    requestStore.set(new Request({
+      id: uuidv4(),
+      error: null,
+    }))
   }
 
   const finishedRequest = () => {
     input.disabled = false
     submitButton.disabled = false
     clearStatuses()
+
+    requestStore.set(null)
   }
 
   const handleError = (error) => {
     finishedRequest()
     setStatusError(error)
+
+    requestStore.update((prevRequest) => {
+      prevRequest.error = error
+      return prevRequest
+    })
   }
 
   const postURL = (data) => {