Compress answers and show upload progress

app/pages/hunt/[huntSlug]/[questSlug]/index.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { createImageURL } from '#shared/utils/image';
+import { compressImage, createImageURL } from '#shared/utils/image';
 import ClickableImage from '~/components/ClickableImage.vue';
 import MultilineString from '~/components/MultilineString.vue';
 import { useI18nKey } from '~/composables/useI18nKey';
@@ -55,11 +55,24 @@ const textType = {
 
 const newImage = ref<File>();
 
+const newImageURL = computed(() =>
+  newImage.value ? createImageURL(newImage.value) : undefined
+);
+
 const uploading = ref(false);
+const uploadingImage = ref(false);
+const compressing = ref(false);
+const uploadProgress = ref(1);
 const submitError = ref('');
+useEventListener(window, 'beforeunload', (ev) => {
+  if (uploading.value) {
+    ev.preventDefault();
+  }
+});
 async function submit() {
   uploading.value = true;
   submitError.value = '';
+  uploadProgress.value = 0;
 
   const body = new FormData();
   body.set('lang', locale.value);
@@ -74,27 +87,38 @@ async function submit() {
     body.set('final', 'true');
   }
   if (newImage.value) {
-    body.set('image', newImage.value);
+    uploadingImage.value = true;
+    compressing.value = true;
+    const compressedImage = await compressImage(newImage.value);
+    compressing.value = false;
+    body.set('image', compressedImage);
   }
+  const xhr = new XMLHttpRequest();
 
   try {
-    await $fetch(`/api/quest/${questSlug?.id}/submit`, {
-      method: 'POST',
-      body
+    await new Promise((resolve) => {
+      xhr.upload.addEventListener('progress', (event) => {
+        if (event.lengthComputable) {
+          uploadProgress.value = event.loaded / event.total;
+        }
+      });
+      xhr.addEventListener('loadend', () => {
+        resolve(xhr.readyState === 4 && xhr.status === 200);
+        uploadProgress.value = 1;
+      });
+      xhr.open('POST', `/api/quest/${questSlug?.id}/submit`, true);
+      xhr.withCredentials = true;
+      xhr.send(body);
     });
 
     await refresh();
     answer.value = data.value?.answer?.text;
     newImage.value = undefined;
   } catch (e) {
-    if (e instanceof Error && 'statusCode' in e && e.statusCode === 418) {
+    if (xhr.status === 418) {
       submitError.value = t('page.quest.already_finalized');
       await refresh();
-    } else if (
-      e instanceof Error &&
-      'statusCode' in e &&
-      e.statusCode === 409
-    ) {
+    } else if (xhr.status === 409) {
       submitError.value = t('page.quest.conflict');
     } else {
       submitError.value = parseError(e);
@@ -102,11 +126,31 @@ async function submit() {
   }
 
   uploading.value = false;
+  uploadingImage.value = false;
 }
 </script>
 
 <template>
   <div>
+    <VaModal
+      :model-value="uploadingImage"
+      no-outside-dismiss
+      hide-default-actions
+      no-dismiss
+    >
+      <h2 class="text-2xl font-bold">{{ t('page.quest.upload_title') }}</h2>
+      <p v-if="compressing" class="text-lg">
+        {{ t('page.quest.upload_compress') }}
+      </p>
+      <VaProgressCircle
+        v-else
+        class="mx-auto"
+        :model-value="uploadProgress * 100"
+        size="50dvw"
+      >
+        {{ (uploadProgress * 100).toFixed(0) + '%' }}
+      </VaProgressCircle>
+    </VaModal>
     <VaButtonGroup>
       <VaButton
         icon="arrow_back"
@@ -230,8 +274,8 @@ async function submit() {
               </VaInput>
 
               <VaImage
-                v-if="newImage"
-                :src="createImageURL(newImage)"
+                v-if="newImageURL"
+                :src="newImageURL"
                 class="max-h-60 w-full"
                 fit="contain"
                 lazy
@@ -279,7 +323,7 @@ async function submit() {
                     newImage ||
                     data.answer?.text !== answer ||
                     data.answer?.final !== final
-                  )
+                  ) || uploading
                 "
                 :loading="uploading"
                 @click="submit"