Optimistic message sending for chat

src/components/post_status_form/post_status_form.js

@@ -75,7 +75,8 @@ const PostStatusForm = {
     'autoFocus',
     'fileLimit',
     'submitOnEnter',
-    'emojiPickerPlacement'
+    'emojiPickerPlacement',
+    'optimisticPosting'
   ],
   components: {
     MediaUpload,
@@ -272,7 +273,7 @@ const PostStatusForm = {
       if (this.preview) this.previewStatus()
     },
     async postStatus (event, newStatus, opts = {}) {
-      if (this.posting) { return }
+      if (this.posting && !this.optimisticPosting) { return }
       if (this.disableSubmit) { return }
       if (this.emojiInputShown) { return }
       if (this.submitOnEnter) {
@@ -280,6 +281,8 @@ const PostStatusForm = {
         event.preventDefault()
       }
 
+      if (this.optimisticPosting && (this.emptyStatus || this.isOverLengthLimit)) { return }
+
       if (this.emptyStatus) {
         this.error = this.$t('post_status.empty_status_error')
         return

src/components/post_status_form/post_status_form.vue

@@ -124,7 +124,7 @@
             v-model="newStatus.spoilerText"
             type="text"
             :placeholder="$t('post_status.content_warning')"
-            :disabled="posting"
+            :disabled="posting && !optimisticPosting"
             size="1"
             class="form-post-subject"
           >
@@ -150,7 +150,7 @@
             :placeholder="placeholder || $t('post_status.default')"
             rows="1"
             cols="1"
-            :disabled="posting"
+            :disabled="posting && !optimisticPosting"
             class="form-post-body"
             :class="{ 'scrollable-form': !!maxHeight }"
             @keydown.exact.enter="submitOnEnter && postStatus($event, newStatus)"