iOS Chromoting Client

remoting/ios/ui/host_list_view_controller.mm

+// Copyright 2014 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.
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#import "remoting/ios/ui/host_list_view_controller.h"
+
+#import "remoting/ios/authorize.h"
+#import "remoting/ios/host.h"
+#import "remoting/ios/host_cell.h"
+#import "remoting/ios/host_refresh.h"
+#import "remoting/ios/utility.h"
+#import "remoting/ios/ui/host_view_controller.h"
+
+@interface HostListViewController (Private)
+- (void)refreshHostList;
+- (void)checkUserAndRefreshHostList;
+- (BOOL)isSignedIn;
+- (void)signInUser;
+// Callback from [Authorize createLoginController...]
+- (void)viewController:(UIViewController*)viewController
+      finishedWithAuth:(GTMOAuth2Authentication*)authResult
+                 error:(NSError*)error;
+@end
+
+@implementation HostListViewController
+
+@synthesize userEmail = _userEmail;
+@synthesize authorization = _authorization;
+
+// Override default setter
+- (void)setAuthorization:(GTMOAuth2Authentication*)authorization {
+  _authorization = authorization;
+  if (_authorization.canAuthorize) {
+    _userEmail = _authorization.userEmail;
+  } else {
+    _userEmail = nil;
+  }
+
+  NSString* userName = _userEmail;
+
+  if (userName == nil) {
+    userName = @"Not logged in";
+  }
+
+  [_btnAccount setTitle:userName forState:UIControlStateNormal];
+
+  [self refreshHostList];
+}
+
+// Override UIViewController
+// Create google+ service for google authentication and oAuth2 authorization.
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  [_tableHostList setDataSource:self];
+  [_tableHostList setDelegate:self];
+
+  _versionInfo.title = [Utility appVersionNumberDisplayString];
+}
+
+// Override UIViewController
+- (void)viewWillAppear:(BOOL)animated {
+  [super viewWillAppear:animated];
+  [self.navigationController setNavigationBarHidden:NO animated:NO];
+  [self setAuthorization:[Authorize getAnyExistingAuthorization]];
+}
+
+// Override UIViewController
+// Cancel segue when host status is not online
+- (BOOL)shouldPerformSegueWithIdentifier:(NSString*)identifier
+                                  sender:(id)sender {
+  if ([identifier isEqualToString:@"ConnectToHost"]) {
+    Host* host = [self hostAtIndex:[_tableHostList indexPathForCell:sender]];
+    if (![host.status isEqualToString:@"ONLINE"]) {
+      return NO;
+    }
+  }
+  return YES;
+}
+
+// Override UIViewController
+// check for segues defined in the storyboard by identifier, and set a few
+// properties before transitioning
+- (void)prepareForSegue:(UIStoryboardSegue*)segue sender:(id)sender {
+  if ([segue.identifier isEqualToString:@"ConnectToHost"]) {
+    // the designationViewController type is defined by the storyboard
+    HostViewController* hostView =
+        static_cast<HostViewController*>(segue.destinationViewController);
+
+    NSString* authToken =
+        [_authorization.parameters valueForKey:@"access_token"];
+
+    if (authToken == nil) {
+      authToken = _authorization.authorizationTokenKey;
+    }
+
+    [hostView setHostDetails:[self hostAtIndex:[_tableHostList
+                                                   indexPathForCell:sender]]
+                   userEmail:_userEmail
+          authorizationToken:authToken];
+  }
+}
+
+// @protocol HostRefreshDelegate, remember received host list for the table
+// view to refresh from
+- (void)hostListRefresh:(NSArray*)hostList
+           errorMessage:(NSString*)errorMessage {
+  if (hostList != nil) {
+    _hostList = hostList;
+    [_tableHostList reloadData];
+  }
+  [_refreshActivityIndicator stopAnimating];
+  if (errorMessage != nil) {
+    [Utility showAlert:@"Host Refresh Failed" message:errorMessage];
+  }
+}
+
+// @protocol UITableViewDataSource
+// Only have 1 section and it contains all the hosts
+- (NSInteger)tableView:(UITableView*)tableView
+    numberOfRowsInSection:(NSInteger)section {
+  return [_hostList count];
+}
+
+// @protocol UITableViewDataSource
+// Convert a host entry to a table row
+- (HostCell*)tableView:(UITableView*)tableView
+    cellForRowAtIndexPath:(NSIndexPath*)indexPath {
+  static NSString* CellIdentifier = @"HostStatusCell";
+
+  HostCell* cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier
+                                                   forIndexPath:indexPath];
+
+  Host* host = [self hostAtIndex:indexPath];
+  cell.labelHostName.text = host.hostName;
+  cell.labelStatus.text = host.status;
+
+  UIColor* statColor = nil;
+  if ([host.status isEqualToString:@"ONLINE"]) {
+    statColor = [[UIColor alloc] initWithRed:0 green:1 blue:0 alpha:1];
+  } else {
+    statColor = [[UIColor alloc] initWithRed:1 green:0 blue:0 alpha:1];
+  }
+  [cell.labelStatus setTextColor:statColor];
+
+  return cell;
+}
+
+// @protocol UITableViewDataSource
+// Rows are not editable via standard UI mechanisms
+- (BOOL)tableView:(UITableView*)tableView
+    canEditRowAtIndexPath:(NSIndexPath*)indexPath {
+  return NO;
+}
+
+- (IBAction)btnRefreshHostListPressed:(id)sender {
+  [self refreshHostList];
+}
+
+- (IBAction)btnAccountPressed:(id)sender {
+  [self signInUser];
+}
+
+- (void)refreshHostList {
+  [_refreshActivityIndicator startAnimating];
+  _hostList = [[NSArray alloc] init];
+  [_tableHostList reloadData];
+
+  // Insert a small delay so the user is well informed that something is
+  // happening by the animating activity indicator
+  [self performSelector:@selector(checkUserAndRefreshHostList)
+             withObject:nil
+             afterDelay:.5];
+}
+
+//  Most likely you want to call refreshHostList
+- (void)checkUserAndRefreshHostList {
+  if (![self isSignedIn]) {
+    [self signInUser];
+  } else {
+    HostRefresh* hostRefresh = [[HostRefresh alloc] init];
+    [hostRefresh refreshHostList:_authorization delegate:self];
+  }
+}
+
+- (BOOL)isSignedIn {
+  return (_userEmail != nil);
+}
+
+// Launch the google.com authentication and authorization process.  If a user is
+// already signed in, begin by signing out so another account could be
+// signed in.
+- (void)signInUser {
+  [self presentViewController:
+            [Authorize createLoginController:self
+                            finishedSelector:@selector(viewController:
+                                                     finishedWithAuth:
+                                                                error:)]
+                     animated:YES
+                   completion:nil];
+}
+
+// Callback from [Authorize createLoginController...]
+// Handle completion of the authentication process, and updates the service
+// with the new credentials.
+- (void)viewController:(UIViewController*)viewController
+      finishedWithAuth:(GTMOAuth2Authentication*)authResult
+                 error:(NSError*)error {
+  [viewController.presentingViewController dismissViewControllerAnimated:NO
+                                                              completion:nil];
+
+  if (error != nil) {
+    [Utility showAlert:@"Authentication Error"
+               message:error.localizedDescription];
+    [self setAuthorization:nil];
+  } else {
+    [self setAuthorization:authResult];
+  }
+}
+
+- (Host*)hostAtIndex:(NSIndexPath*)indexPath {
+  return [_hostList objectAtIndex:indexPath.row];
+}
+
+@end