Moves the attach-file shortcut into the component

ts/background.ts

@@ -1565,18 +1565,7 @@ export async function startApp(): Promise<void> {
       // Send in expanded composer - handled by component
 
       // Attach file
-      if (
-        conversation &&
-        commandOrCtrl &&
-        !shiftKey &&
-        (key === 'u' || key === 'U')
-      ) {
-        conversation.trigger('attach-file');
-
-        event.preventDefault();
-        event.stopPropagation();
-        return;
-      }
+      // hooks/useKeyboardShorcuts useAttachFileShortcut
 
       // Remove draft link preview
       if (

ts/components/CompositionArea.tsx

@@ -50,6 +50,10 @@ import { MediaQualitySelector } from './MediaQualitySelector';
 import { Quote, Props as QuoteProps } from './conversation/Quote';
 import { StagedLinkPreview } from './conversation/StagedLinkPreview';
 import { countStickers } from './stickers/lib';
+import {
+  useAttachFileShortcut,
+  useKeyboardShortcuts,
+} from '../hooks/useKeyboardShortcuts';
 
 export type CompositionAPIType =
   | {
@@ -269,7 +273,7 @@ export const CompositionArea = ({
     [draftAttachments, onSendMessage, setLarge]
   );
 
-  const launchAttachmentPicker = () => {
+  const launchAttachmentPicker = useCallback(() => {
     const fileInput = fileInputRef.current;
     if (fileInput) {
       // Setting the value to empty so that onChange always fires in case
@@ -277,7 +281,10 @@ export const CompositionArea = ({
       fileInput.value = '';
       fileInput.click();
     }
-  };
+  }, []);
+
+  const attachFileShortcut = useAttachFileShortcut(launchAttachmentPicker);
+  useKeyboardShortcuts(attachFileShortcut);
 
   const focusInput = useCallback(() => {
     if (inputApiRef.current) {

ts/components/conversation/AudioCapture.tsx

@@ -1,7 +1,7 @@
 // Copyright 2016-2020 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import React, { useCallback, useEffect, useState } from 'react';
 import * as moment from 'moment';
 import { noop } from 'lodash';
 
@@ -13,7 +13,7 @@ import { ToastVoiceNoteLimit } from '../ToastVoiceNoteLimit';
 import { ToastVoiceNoteMustBeOnlyAttachment } from '../ToastVoiceNoteMustBeOnlyAttachment';
 import { useEscapeHandling } from '../../hooks/useEscapeHandling';
 import {
-  getStartRecordingShortcut,
+  useStartRecordingShortcut,
   useKeyboardShortcuts,
 } from '../../hooks/useKeyboardShortcuts';
 
@@ -94,10 +94,7 @@ export const AudioCapture = ({
 
   useEscapeHandling(escapeRecording);
 
-  const startRecordingShortcut = useMemo(() => {
-    return getStartRecordingShortcut(startRecording);
-  }, [startRecording]);
-
+  const startRecordingShortcut = useStartRecordingShortcut(startRecording);
   useKeyboardShortcuts(startRecordingShortcut);
 
   // Update timestamp regularly, then timeout if recording goes over five minutes

ts/hooks/useKeyboardShortcuts.tsx

@@ -1,7 +1,7 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-import { useEffect } from 'react';
+import { useCallback, useEffect } from 'react';
 import { get } from 'lodash';
 
 import * as KeyboardLayout from '../services/keyboardLayout';
@@ -15,24 +15,48 @@ function isCmdOrCtrl(ev: KeyboardEvent): boolean {
   return commandKey || controlKey;
 }
 
-export function getStartRecordingShortcut(
+export function useStartRecordingShortcut(
   startAudioRecording: () => unknown
 ): KeyboardShortcutHandlerType {
-  return ev => {
-    const { shiftKey } = ev;
+  return useCallback(
+    ev => {
+      const { shiftKey } = ev;
+      const key = KeyboardLayout.lookup(ev);
 
-    const key = KeyboardLayout.lookup(ev);
+      if (isCmdOrCtrl(ev) && shiftKey && (key === 'v' || key === 'V')) {
+        ev.preventDefault();
+        ev.stopPropagation();
 
-    if (isCmdOrCtrl(ev) && shiftKey && (key === 'v' || key === 'V')) {
-      startAudioRecording();
-      ev.preventDefault();
-      ev.stopPropagation();
+        startAudioRecording();
+        return true;
+      }
 
-      return true;
-    }
+      return false;
+    },
+    [startAudioRecording]
+  );
+}
 
-    return false;
-  };
+export function useAttachFileShortcut(
+  attachFile: () => unknown
+): KeyboardShortcutHandlerType {
+  return useCallback(
+    ev => {
+      const { shiftKey } = ev;
+      const key = KeyboardLayout.lookup(ev);
+
+      if (isCmdOrCtrl(ev) && !shiftKey && (key === 'u' || key === 'U')) {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        attachFile();
+        return true;
+      }
+
+      return false;
+    },
+    [attachFile]
+  );
 }
 
 export function useKeyboardShortcuts(

ts/views/conversation_view.ts

@@ -287,7 +287,6 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
     // These are triggered by background.ts for keyboard handling
     this.listenTo(this.model, 'focus-composer', this.focusMessageField);
     this.listenTo(this.model, 'open-all-media', this.showAllMedia);
-    this.listenTo(this.model, 'attach-file', this.onChooseAttachment);
     this.listenTo(this.model, 'escape-pressed', this.resetPanel);
     this.listenTo(this.model, 'show-message-details', this.showMessageDetail);
     this.listenTo(this.model, 'show-contact-modal', this.showContactModal);
@@ -1288,20 +1287,6 @@ export class ConversationView extends window.Backbone.View<ConversationModel> {
     });
   }
 
-  onChooseAttachment(): void {
-    // TODO: DESKTOP-2425
-    this.$('input.file-input').click();
-  }
-
-  async onChoseAttachment(): Promise<void> {
-    const fileField = this.$('input.file-input');
-    const files: Array<File> = Array.from(fileField.prop('files'));
-
-    fileField.val([]);
-
-    await this.processAttachments(files);
-  }
-
   // TODO DESKTOP-2426
   async processAttachments(files: Array<File>): Promise<void> {
     const {