Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/delegate.m

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "delegate.h"
+
+@implementation DownloadDelegate : NSObject
+// Returns a path to a user's home download folder.
+- (NSString*)getDownloadsFilePath {

[Elly Fong-Jones, 2016/07/06 15:22:02]

This should probably be override-able somehow (command-line argument?) for
integration testing

+  NSArray* downloadPaths = NSSearchPathForDirectoriesInDomains(
+    NSDownloadsDirectory, NSUserDomainMask, YES);
+  NSString* filePathToDownloads = [downloadPaths objectAtIndex:0];
+  NSArray* filenameComposition = @[filePathToDownloads, @"GoogleChrome.dmg"];
+  NSString* completeFilePath = [NSString pathWithComponents:
+                                filenameComposition];
+  return completeFilePath;
+}
+
+// Skeleton of delegate method to provide download progress updates.
+// TODO: Make use of (totalBytesWritten/totalBytesExpectedToWrite)*100
+// to generate download progress percentage.
+- (void)URLSession:(NSURLSession*)session
+      downloadTask:(NSURLSessionDownloadTask*)downloadTask
+      didWriteData:(int64_t)bytesWritten
+ totalBytesWritten:(int64_t)totalBytesWritten
+totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite{
+
+}
+
+// Delegate method to move downloaded disk image to user's Download directory.
+- (void)URLSession:(NSURLSession*)session
+      downloadTask:(NSURLSessionDownloadTask*)downloadTask
+didFinishDownloadingToURL:(NSURL*)location{
+  NSFileManager* manager = [[NSFileManager alloc] init];
+  NSString* temporaryDownloadDirectory = [NSString
+    stringWithFormat:@"%@",location.path];
+  NSURL* downloadsDirectory = [[NSURL alloc]
+    initFileURLWithPath:[self getDownloadsFilePath]];
+
+  if ( [manager isReadableFileAtPath:temporaryDownloadDirectory] )
+    [manager copyItemAtURL:location toURL:downloadsDirectory error:nil];

[Elly Fong-Jones, 2016/07/06 15:22:02]

What do we do if it's not?

+}
+@end
+