Add feature to automatically attach quote on eligible link past in Web UI composer (#36364)

app/javascript/mastodon/actions/compose_typed.ts

@@ -4,6 +4,7 @@ import { createAction } from '@reduxjs/toolkit';
 import type { List as ImmutableList, Map as ImmutableMap } from 'immutable';
 
 import { apiUpdateMedia } from 'mastodon/api/compose';
+import { apiGetSearch } from 'mastodon/api/search';
 import type { ApiMediaAttachmentJSON } from 'mastodon/api_types/media_attachments';
 import type { MediaAttachment } from 'mastodon/models/media_attachment';
 import {
@@ -16,6 +17,7 @@ import type { Status } from '../models/status';
 
 import { showAlert } from './alerts';
 import { focusCompose } from './compose';
+import { importFetchedStatuses } from './importer';
 import { openModal } from './modal';
 
 const messages = defineMessages({
@@ -165,6 +167,41 @@ export const quoteComposeById = createAppThunk(
   },
 );
 
+export const pasteLinkCompose = createDataLoadingThunk(
+  'compose/pasteLink',
+  async ({ url }: { url: string }) => {
+    return await apiGetSearch({
+      q: url,
+      type: 'statuses',
+      resolve: true,
+      limit: 2,
+    });
+  },
+  (data, { dispatch, getState }) => {
+    const composeState = getState().compose;
+
+    if (
+      composeState.get('quoted_status_id') ||
+      composeState.get('is_submitting') ||
+      composeState.get('poll') ||
+      composeState.get('is_uploading')
+    )
+      return;
+
+    dispatch(importFetchedStatuses(data.statuses));
+
+    if (
+      data.statuses.length === 1 &&
+      data.statuses[0] &&
+      ['automatic', 'manual'].includes(
+        data.statuses[0].quote_approval?.current_user ?? 'denied',
+      )
+    ) {
+      dispatch(quoteComposeById(data.statuses[0].id));
+    }
+  },
+);
+
 export const quoteComposeCancel = createAction('compose/quoteComposeCancel');
 
 export const setComposeQuotePolicy = createAction<ApiQuotePolicy>(

app/javascript/mastodon/components/autosuggest_textarea.jsx

@@ -150,10 +150,7 @@ const AutosuggestTextarea = forwardRef(({
   }, [suggestions, onSuggestionSelected, textareaRef]);
 
   const handlePaste = useCallback((e) => {
-    if (e.clipboardData && e.clipboardData.files.length === 1) {
+    onPaste(e);
-      onPaste(e.clipboardData.files);
-      e.preventDefault();
-    }
   }, [onPaste]);
 
   // Show the suggestions again whenever they change and the textarea is focused

app/javascript/mastodon/features/compose/containers/compose_form_container.js

@@ -10,10 +10,13 @@ import {
   insertEmojiCompose,
   uploadCompose,
 } from 'mastodon/actions/compose';
+import { pasteLinkCompose } from 'mastodon/actions/compose_typed';
 import { openModal } from 'mastodon/actions/modal';
 
 import ComposeForm from '../components/compose_form';
 
+const urlLikeRegex = /^https?:\/\/[^\s]+\/[^\s]+$/i;
+
 const mapStateToProps = state => ({
   text: state.getIn(['compose', 'text']),
   suggestions: state.getIn(['compose', 'suggestions']),
@@ -71,8 +74,21 @@ const mapDispatchToProps = (dispatch, props) => ({
     dispatch(changeComposeSpoilerText(checked));
   },
 
-  onPaste (files) {
+  onPaste (e) {
-    dispatch(uploadCompose(files));
+    if (e.clipboardData && e.clipboardData.files.length === 1) {
+      dispatch(uploadCompose(e.clipboardData.files));
+      e.preventDefault();
+    } else if (e.clipboardData && e.clipboardData.files.length === 0) {
+      const data = e.clipboardData.getData('text/plain');
+      if (!data.match(urlLikeRegex)) return;
+
+      try {
+        const url = new URL(data);
+        dispatch(pasteLinkCompose({ url }));
+      } catch {
+        return;
+      }
+    }
   },
 
   onPickEmoji (position, data, needsSpace) {