element-ios/RiotShareExtension/RoomsListViewController.m

/*
 Copyright 2017 Aram Sargsyan
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
 http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

#import "RoomsListViewController.h"
#import "RoomTableViewCell.h"
#import "NSBundle+MatrixKit.h"
@import MobileCoreServices;


@interface RoomsListViewController () <UITableViewDataSource, UITableViewDelegate>

@property (nonatomic) NSExtensionContext *shareExtensionContext;
@property (copy) void (^failureBlock)();
@property (nonatomic) NSArray <MXRoom *> *rooms;
@property (nonatomic) UITableView *mainTableView;

@end


@implementation RoomsListViewController

#pragma mark - Lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self configureTableView];
}

#pragma mark - Public

+ (instancetype)listViewControllerWithContext:(NSExtensionContext *)context failureBlock:(void(^)())failureBlock
{
    RoomsListViewController *listViewController = [[self class] new];
    listViewController.shareExtensionContext = context;
    listViewController.failureBlock = failureBlock;
    return listViewController;
}

- (void)updateWithRooms:(NSArray <MXRoom *>*)rooms
{
    self.rooms = rooms;
    [self.mainTableView reloadData];
}

#pragma mark - Views

- (void)configureTableView
{
    self.mainTableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStylePlain];
    self.mainTableView.dataSource = self;
    self.mainTableView.delegate = self;
    [self.mainTableView registerNib:[RoomTableViewCell nib] forCellReuseIdentifier:[RoomTableViewCell defaultReuseIdentifier]];
    
    [self.view addSubview:self.mainTableView];
    self.mainTableView.translatesAutoresizingMaskIntoConstraints = NO;
    self.view.translatesAutoresizingMaskIntoConstraints = NO;
    NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:self.mainTableView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeWidth multiplier:1 constant:0];
    widthConstraint.active = YES;
    NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:self.mainTableView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeHeight multiplier:1 constant:0];
    heightConstraint.active = YES;
    NSLayoutConstraint *centerXConstraint = [NSLayoutConstraint constraintWithItem:self.mainTableView attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterX multiplier:1 constant:0];
    centerXConstraint.active = YES;
    NSLayoutConstraint *centerYConstraint = [NSLayoutConstraint constraintWithItem:self.mainTableView attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeCenterY multiplier:1 constant:0];
    centerYConstraint.active = YES;
}

#pragma mark - Private

- (void)sendToRoom:(MXRoom *)room
{
    NSString *UTTypeText = (__bridge NSString *)kUTTypeText;
    NSString *UTTypeURL = (__bridge NSString *)kUTTypeURL;
    NSString *UTTypeImage = (__bridge NSString *)kUTTypeImage;
    NSString *UTTypeVideo = (__bridge NSString *)kUTTypeVideo;
    
    for (NSExtensionItem *item in self.shareExtensionContext.inputItems)
    {
        for (NSItemProvider *itemProvider in item.attachments)
        {
            if ([itemProvider hasItemConformingToTypeIdentifier:UTTypeText])
            {
                [itemProvider loadItemForTypeIdentifier:UTTypeText options:nil completionHandler:^(NSString *text, NSError * _Null_unspecified error) {
                    if (!text)
                    {
                        [self showFailureAlert];
                        return;
                    }
                    [room sendTextMessage:text success:^(NSString *eventId) {
                        [self.shareExtensionContext completeRequestReturningItems:@[item] completionHandler:nil];
                    } failure:^(NSError *error) {
                        NSLog(@"[RoomsListViewController] sendTextMessage failed.");
                        [self showFailureAlert];
                    }];
                }];
            }
            else if ([itemProvider hasItemConformingToTypeIdentifier:UTTypeURL])
            {
                [itemProvider loadItemForTypeIdentifier:UTTypeURL options:nil completionHandler:^(NSURL *url, NSError * _Null_unspecified error) {
                    if (!url)
                    {
                        [self showFailureAlert];
                        return;
                    }
                    [room sendTextMessage:url.absoluteString success:^(NSString *eventId) {
                        [self.shareExtensionContext completeRequestReturningItems:@[item] completionHandler:nil];
                    } failure:^(NSError *error) {
                        NSLog(@"[RoomsListViewController] sendTextMessage failed.");
                        [self showFailureAlert];
                    }];
                }];
            }
            else if ([itemProvider hasItemConformingToTypeIdentifier:UTTypeImage])
            {
                [itemProvider loadItemForTypeIdentifier:UTTypeImage options:nil completionHandler:^(NSData *imageData, NSError * _Null_unspecified error)
                 {
                     if (!imageData)
                     {
                         [self showFailureAlert];
                         return;
                     }
                     //Send the image
                     UIImage *image = [[UIImage alloc] initWithData:imageData];
                     
                     NSString *mimeType;
                     if ([itemProvider hasItemConformingToTypeIdentifier:(__bridge NSString *)kUTTypePNG])
                     {
                         mimeType = @"image/png";
                     }
                     else if ([itemProvider hasItemConformingToTypeIdentifier:(__bridge NSString *)kUTTypeJPEG])
                     {
                         mimeType = @"image/jpeg";
                     }
                     else
                     {
                         image = [[UIImage alloc] initWithData:UIImageJPEGRepresentation(image, 1.0)];
                         mimeType = @"image/jpeg";
                     }
                     
                     UIImage *thumbnail = nil;
                     // Thumbnail is useful only in case of encrypted room
                     if (room.state.isEncrypted)
                     {
                         thumbnail = [MXKTools reduceImage:image toFitInSize:CGSizeMake(800, 600)];
                         if (thumbnail == image)
                         {
                             thumbnail = nil;
                         }
                     }
                     [room sendImage:imageData withImageSize:image.size mimeType:mimeType andThumbnail:thumbnail localEcho:nil success:^(NSString *eventId)
                      {
                          [self.shareExtensionContext completeRequestReturningItems:@[item] completionHandler:nil];
                      }
                         failure:^(NSError *error)
                      {
                          NSLog(@"[RoomsListViewController] sendImage failed.");
                          [self showFailureAlert];
                      }];
                 }];
            }
            else if ([itemProvider hasItemConformingToTypeIdentifier:UTTypeVideo])
            {
                [itemProvider loadItemForTypeIdentifier:UTTypeVideo options:nil completionHandler:^(NSURL *videoLocalUrl, NSError * _Null_unspecified error)
                 {
                     if (!videoLocalUrl)
                     {
                         [self showFailureAlert];
                         return;
                     }
                     
                     // Retrieve the video frame at 1 sec to define the video thumbnail
                     AVURLAsset *urlAsset = [[AVURLAsset alloc] initWithURL:videoLocalUrl options:nil];
                     AVAssetImageGenerator *assetImageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:urlAsset];
                     assetImageGenerator.appliesPreferredTrackTransform = YES;
                     CMTime time = CMTimeMake(1, 1);
                     CGImageRef imageRef = [assetImageGenerator copyCGImageAtTime:time actualTime:NULL error:nil];
                     // Finalize video attachment
                     UIImage *videoThumbnail = [[UIImage alloc] initWithCGImage:imageRef];
                     CFRelease(imageRef);
                     
                     [room sendVideo:videoLocalUrl withThumbnail:videoThumbnail localEcho:nil success:^(NSString *eventId) {
                         [self.shareExtensionContext completeRequestReturningItems:@[item] completionHandler:nil];
                     } failure:^(NSError *error) {
                         NSLog(@"[RoomsListViewController] sendVideo failed.");
                         [self showFailureAlert];
                     }];
                     
                 }];
            }
        }
    }
}

- (void)showFailureAlert
{
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:NSLocalizedStringFromTable(@"room_event_failed_to_send", @"Vector", nil) message:nil preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:[NSBundle mxk_localizedStringForKey:@"ok"] style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        if (self.failureBlock)
        {
            self.failureBlock();
        }
        else
        {
            [self.shareExtensionContext cancelRequestWithError:[NSError errorWithDomain:@"MXUserFailureErrorDomain" code:500 userInfo:nil]];
        }
    }];
    [alertController addAction:okAction];
    [self presentViewController:alertController animated:YES completion:nil];
}

#pragma mark - UITableViewDataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.rooms.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    RoomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:[RoomTableViewCell defaultReuseIdentifier]];
    MXRoom *room = self.rooms[indexPath.row];
    
    [cell render:room];
    if (!room.summary.displayname.length && !cell.titleLabel.text.length)
    {
        cell.titleLabel.text = NSLocalizedStringFromTable(@"room_displayname_no_title", @"Vector", nil);
    }
    
    return cell;
}

#pragma mark - UITableViewDelegate

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return [RoomTableViewCell cellHeight];
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:[NSString stringWithFormat:NSLocalizedStringFromTable(@"send_to", @"Vector", nil), self.rooms[indexPath.row].riotDisplayname] message:nil preferredStyle:UIAlertControllerStyleAlert];
    
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:[NSBundle mxk_localizedStringForKey:@"cancel"] style:UIAlertActionStyleCancel handler:nil];
    [alertController addAction:cancelAction];
    
    UIAlertAction *sendAction = [UIAlertAction actionWithTitle:[NSBundle mxk_localizedStringForKey:@"send"] style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [self sendToRoom:self.rooms[indexPath.row]];
    }];
    [alertController addAction:sendAction];
    
    [self presentViewController:alertController animated:YES completion:nil];
}

@end