src/remoting/ios/ui/host_list_view_controller.mm

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #if !defined(__has_feature) || !__has_feature(objc_arc)
   6 #error "This file requires ARC support."
   7 #endif
   8
   9 #import "remoting/ios/ui/host_list_view_controller.h"
  10
  11 #import "remoting/ios/authorize.h"
  12 #import "remoting/ios/host.h"
  13 #import "remoting/ios/host_cell.h"
  14 #import "remoting/ios/host_refresh.h"
  15 #import "remoting/ios/utility.h"
  16 #import "remoting/ios/ui/host_view_controller.h"
  17
  18 @interface HostListViewController (Private)
  19 - (void)refreshHostList;
  20 - (void)checkUserAndRefreshHostList;
  21 - (BOOL)isSignedIn;
  22 - (void)signInUser;
  23 // Callback from [Authorize createLoginController...]
  24 - (void)viewController:(UIViewController*)viewController
  25       finishedWithAuth:(GTMOAuth2Authentication*)authResult
  26                  error:(NSError*)error;
  27 @end
  28
  29 @implementation HostListViewController
  30
  31 @synthesize userEmail = _userEmail;
  32 @synthesize authorization = _authorization;
  33
  34 // Override default setter
  35 - (void)setAuthorization:(GTMOAuth2Authentication*)authorization {
  36   _authorization = authorization;
  37   if (_authorization.canAuthorize) {
  38     _userEmail = _authorization.userEmail;
  39   } else {
  40     _userEmail = nil;
  41   }
  42
  43   NSString* userName = _userEmail;
  44
  45   if (userName == nil) {
  46     userName = @"Not logged in";
  47   }
  48
  49   [_btnAccount setTitle:userName forState:UIControlStateNormal];
  50
  51   [self refreshHostList];
  52 }
  53
  54 // Override UIViewController
  55 // Create google+ service for google authentication and oAuth2 authorization.
  56 - (void)viewDidLoad {
  57   [super viewDidLoad];
  58
  59   [_tableHostList setDataSource:self];
  60   [_tableHostList setDelegate:self];
  61
  62   _versionInfo.title = [Utility appVersionNumberDisplayString];
  63 }
  64
  65 // Override UIViewController
  66 - (void)viewWillAppear:(BOOL)animated {
  67   [super viewWillAppear:animated];
  68   [self.navigationController setNavigationBarHidden:NO animated:NO];
  69   [self setAuthorization:[Authorize getAnyExistingAuthorization]];
  70 }
  71
  72 // Override UIViewController
  73 // Cancel segue when host status is not online
  74 - (BOOL)shouldPerformSegueWithIdentifier:(NSString*)identifier
  75                                   sender:(id)sender {
  76   if ([identifier isEqualToString:@"ConnectToHost"]) {
  77     Host* host = [self hostAtIndex:[_tableHostList indexPathForCell:sender]];
  78     if (![host.status isEqualToString:@"ONLINE"]) {
  79       return NO;
  80     }
  81   }
  82   return YES;
  83 }
  84
  85 // Override UIViewController
  86 // check for segues defined in the storyboard by identifier, and set a few
  87 // properties before transitioning
  88 - (void)prepareForSegue:(UIStoryboardSegue*)segue sender:(id)sender {
  89   if ([segue.identifier isEqualToString:@"ConnectToHost"]) {
  90     // the designationViewController type is defined by the storyboard
  91     HostViewController* hostView =
  92         static_cast<HostViewController*>(segue.destinationViewController);
  93
  94     NSString* authToken =
  95         [_authorization.parameters valueForKey:@"access_token"];
  96
  97     if (authToken == nil) {
  98       authToken = _authorization.authorizationTokenKey;
  99     }
 100
 101     [hostView setHostDetails:[self hostAtIndex:[_tableHostList
 102                                                    indexPathForCell:sender]]
 103                    userEmail:_userEmail
 104           authorizationToken:authToken];
 105   }
 106 }
 107
 108 // @protocol HostRefreshDelegate, remember received host list for the table
 109 // view to refresh from
 110 - (void)hostListRefresh:(NSArray*)hostList
 111            errorMessage:(NSString*)errorMessage {
 112   if (hostList != nil) {
 113     _hostList = hostList;
 114     [_tableHostList reloadData];
 115   }
 116   [_refreshActivityIndicator stopAnimating];
 117   if (errorMessage != nil) {
 118     [Utility showAlert:@"Host Refresh Failed" message:errorMessage];
 119   }
 120 }
 121
 122 // @protocol UITableViewDataSource
 123 // Only have 1 section and it contains all the hosts
 124 - (NSInteger)tableView:(UITableView*)tableView
 125     numberOfRowsInSection:(NSInteger)section {
 126   return [_hostList count];
 127 }
 128
 129 // @protocol UITableViewDataSource
 130 // Convert a host entry to a table row
 131 - (HostCell*)tableView:(UITableView*)tableView
 132     cellForRowAtIndexPath:(NSIndexPath*)indexPath {
 133   static NSString* CellIdentifier = @"HostStatusCell";
 134
 135   HostCell* cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier
 136                                                    forIndexPath:indexPath];
 137
 138   Host* host = [self hostAtIndex:indexPath];
 139   cell.labelHostName.text = host.hostName;
 140   cell.labelStatus.text = host.status;
 141
 142   UIColor* statColor = nil;
 143   if ([host.status isEqualToString:@"ONLINE"]) {
 144     statColor = [[UIColor alloc] initWithRed:0 green:1 blue:0 alpha:1];
 145   } else {
 146     statColor = [[UIColor alloc] initWithRed:1 green:0 blue:0 alpha:1];
 147   }
 148   [cell.labelStatus setTextColor:statColor];
 149
 150   return cell;
 151 }
 152
 153 // @protocol UITableViewDataSource
 154 // Rows are not editable via standard UI mechanisms
 155 - (BOOL)tableView:(UITableView*)tableView
 156     canEditRowAtIndexPath:(NSIndexPath*)indexPath {
 157   return NO;
 158 }
 159
 160 - (IBAction)btnRefreshHostListPressed:(id)sender {
 161   [self refreshHostList];
 162 }
 163
 164 - (IBAction)btnAccountPressed:(id)sender {
 165   [self signInUser];
 166 }
 167
 168 - (void)refreshHostList {
 169   [_refreshActivityIndicator startAnimating];
 170   _hostList = [[NSArray alloc] init];
 171   [_tableHostList reloadData];
 172
 173   // Insert a small delay so the user is well informed that something is
 174   // happening by the animating activity indicator
 175   [self performSelector:@selector(checkUserAndRefreshHostList)
 176              withObject:nil
 177              afterDelay:.5];
 178 }
 179
 180 //  Most likely you want to call refreshHostList
 181 - (void)checkUserAndRefreshHostList {
 182   if (![self isSignedIn]) {
 183     [self signInUser];
 184   } else {
 185     HostRefresh* hostRefresh = [[HostRefresh alloc] init];
 186     [hostRefresh refreshHostList:_authorization delegate:self];
 187   }
 188 }
 189
 190 - (BOOL)isSignedIn {
 191   return (_userEmail != nil);
 192 }
 193
 194 // Launch the google.com authentication and authorization process.  If a user is
 195 // already signed in, begin by signing out so another account could be
 196 // signed in.
 197 - (void)signInUser {
 198   [self presentViewController:
 199             [Authorize createLoginController:self
 200                             finishedSelector:@selector(viewController:
 201                                                      finishedWithAuth:
 202                                                                 error:)]
 203                      animated:YES
 204                    completion:nil];
 205 }
 206
 207 // Callback from [Authorize createLoginController...]
 208 // Handle completion of the authentication process, and updates the service
 209 // with the new credentials.
 210 - (void)viewController:(UIViewController*)viewController
 211       finishedWithAuth:(GTMOAuth2Authentication*)authResult
 212                  error:(NSError*)error {
 213   [viewController.presentingViewController dismissViewControllerAnimated:NO
 214                                                               completion:nil];
 215
 216   if (error != nil) {
 217     [Utility showAlert:@"Authentication Error"
 218                message:error.localizedDescription];
 219     [self setAuthorization:nil];
 220   } else {
 221     [self setAuthorization:authResult];
 222   }
 223 }
 224
 225 - (Host*)hostAtIndex:(NSIndexPath*)indexPath {
 226   return [_hostList objectAtIndex:indexPath.row];
 227 }
 228
 229 @end