[MM-22239] Downloads dropdown (#2227)

* WIP: show/hide temp downloads dropdown

* WIP: Position downloads dropdown correctly under the button

* WIP: Use correct width for dropdown so that right radius and shadows are displayed

* WIP: Add items to download list after finished downloading

* WIP: Add download item base components

* Add "clear all" functionality

* Use type Record<> for downloads saved in config

* Add styling to files in the downloads dropdown

* Open file in folder when clicking it from downloads dropdown. Center svg in parent element

* Update scrollbar styling

* Update scrollbar styling

* Update state of downloaded items if deleted from folder

* Add progress bar in downloads

* Use "x-uncompressed-content-length" in file downloads.

* Keep downloads open when clicking outside their browserview

* Use correct color for downloads dropdown button

* Add better styling to downloads dropdown button

* Allow only 50 download files maximum. Oldest file is being removed if reached

* Autoclose downloads dropdown after 4s of download finish

* Add file thumbnails

* Dont show second dialog if first dismissed

* Add red badge when downloads running and dropdown closed

* Add menu item for Downloads

* Add support for more code file extensions

* Open downloads dropdown instead of folder from the menu

* Run lint:js and fix problems

* Add tests for utils

* Fix issue with dropdown not displaying

* Remove unecessary comment

* Move downloads to separate json file, outside Config

* Add downloads dropdown menu for the 3-dot button

* Dont show dev tools for downloads

* Add cancel download functionality

* Add dark mode styling

* Use View state for downloadsMenu open state

* Fix some style issues

* Add image preview for downloaded images

* Remove extra devTool in weback config

* Fix issue with paths on windows

* Align items left in downloads menu

* Use pretty-bytes for file sizes

* Show download remaining time

* Close downloads dropdown when clicking outside

* Show different units in received bytes when they are different from the total units (kb/mb)

* Dont hide downloads when mattermost view is clicked

* Keep downloads open if download button is clicked

* Use closest() to check for download clicks

* Fix unit tests.
Add tests for new Views and downloadManager
Add @types/jest as devDependency for intellisense

* Remove unecessary tsconfig for jest

* Fix types error

* Add all critical tests for downloadsManager

* WIP: add e2e tests for downloads

* WIP: add e2e tests for downloads

* Rename downloads spec file

* WIP: make vscode debugger work for e2e tests

* Remove unused mock

* Remove defaults for v4 config

* Use electron-mocha for e2e debugger

* Fix e2e tests spawning JsonFileManager twice

* Add async fs functions and add tests for download item UI

* Add async fs functions and add tests for download item UI

* Improve tests with "waitForSelector" to wait for visible elements

* Wait for page load before assertions

* Add tests for file uploads/downloads

* Dont show native notification for completed downloads if dropdown is open

* Increment filenames if file already exists

* Fix antializing in downloads dropdown

* Fix styling of downloads header

* Increase dimensions of green/red icons in downloads

* Fix styling of 3-dot button

* Fix unit tests

* Show 3-dot button only on hover or click

* PR review fixes

* Revert vscode debug fixes

* Mock fs.constants

* Mock fs instead of JsonFileManager in downlaods tests

* Mock fs instead of JsonFileManager in downlaods tests

* Add necessary mocks for downloads manager

* Mark file as deleted if user deleted it

* Fix min-height of downloads dropdown and 3-dot icon position

* Add more tests

* Make size of downloads dropdown dynamic based on content

* Combine log statements

* Close 3-dot menu if user clicks elsewhere

* Move application updates inside downloads dropdown

* Fix update issues

* Fix ipc event payload

* Add missing prop

* Remove unused translations

* Fix failing test

* Fix version unknown

* Remove commented out component

e2e/modules/utils.js

@@ -1,6 +1,7 @@
 // Copyright (c) 2015-2016 Yuya Ochiai
 // Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
 // See LICENSE.txt for license information.
+const fs = require('fs');
 
 function asyncSleep(timeout) {
     return new Promise((resolve) => {
@@ -10,6 +11,92 @@ function asyncSleep(timeout) {
     });
 }
 
+function dirExistsAsync(path) {
+    return new Promise((resolve, reject) => {
+        fs.stat(path, (error, stats) => {
+            if (error) {
+                if (error.code === 'ENOENT') {
+                    resolve(false);
+                } else {
+                    reject(error);
+                }
+                return;
+            }
+            resolve(stats.isDirectory());
+        });
+    });
+}
+
+function mkDirAsync(path) {
+    return new Promise((resolve, reject) => {
+        dirExistsAsync(path).then((exists) => {
+            if (!exists) {
+                fs.mkdir(path, {recursive: true}, (error) => {
+                    if (error) {
+                        reject(error);
+                        return;
+                    }
+                    resolve();
+                });
+            }
+        }).catch((err) => {
+            reject(err);
+        });
+    });
+}
+
+function rmDirAsync(path) {
+    return new Promise((resolve, reject) => {
+        dirExistsAsync(path).then((exists) => {
+            if (exists) {
+                fs.rm(path, {recursive: true, force: true}, (error) => {
+                    if (error) {
+                        if (error.code === 'ENOENT') {
+                            resolve();
+                        }
+                        reject(error);
+                    }
+                    resolve();
+                });
+            }
+            resolve();
+        }).catch((err) => {
+            reject(err);
+        });
+    });
+}
+
+function unlinkAsync(path) {
+    return new Promise((resolve, reject) => {
+        fs.unlink(path, (error) => {
+            if (error) {
+                if (error.code === 'ENOENT') {
+                    resolve();
+                }
+                reject(error);
+            }
+            resolve();
+        });
+    });
+}
+
+function writeFileAsync(path, data) {
+    return new Promise((resolve, reject) => {
+        fs.writeFile(path, data, (err) => {
+            if (err) {
+                reject(err);
+                return;
+            }
+            resolve();
+        });
+    });
+}
+
 module.exports = {
     asyncSleep,
+    dirExistsAsync,
+    mkDirAsync,
+    rmDirAsync,
+    unlinkAsync,
+    writeFileAsync,
 };