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#import "MBXDownloadsTableViewController.h"
#import <Mapbox/Mapbox.h>
static NSString * const MBXOfflineTaskContextNameKey = @"Name";
static NSString * const MBXDownloadsTableViewInactiveCellReuseIdentifier = @"Inactive";
static NSString * const MBXDownloadsTableViewActiveCellReuseIdentifier = @"Active";
@implementation MGLOfflineTask (MBXAdditions)
- (NSString *)name {
NSDictionary *userInfo = [NSKeyedUnarchiver unarchiveObjectWithData:self.context];
NSAssert([userInfo isKindOfClass:[NSDictionary class]], @"Context of offline task isn’t a dictionary.");
NSString *name = userInfo[MBXOfflineTaskContextNameKey];
NSAssert([name isKindOfClass:[NSString class]], @"Name of offline task isn’t a string.");
return name;
}
@end
@interface MBXDownloadsTableViewController () <MGLOfflineTaskDelegate>
@property (nonatomic, strong) NS_MUTABLE_ARRAY_OF(MGLOfflineTask *) *offlineTasks;
@end
@implementation MBXDownloadsTableViewController {
NSUInteger _untitledRegionCount;
}
- (void)viewDidLoad {
[super viewDidLoad];
__weak MBXDownloadsTableViewController *weakSelf = self;
[[MGLOfflineStorage sharedOfflineStorage] getTasksWithCompletionHandler:^(NS_ARRAY_OF(MGLOfflineTask *) *tasks, NSError *error) {
MBXDownloadsTableViewController *strongSelf = weakSelf;
strongSelf.offlineTasks = tasks.mutableCopy;
[strongSelf.tableView reloadData];
for (MGLOfflineTask *task in strongSelf.offlineTasks) {
task.delegate = strongSelf;
[task requestProgress];
}
if (error) {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Can’t Find Downloads" message:@"Mapbox GL was unable to find the existing downloads." preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil]];
[self presentViewController:alertController animated:YES completion:^{
[strongSelf dismissViewControllerAnimated:YES completion:nil];
}];
}
}];
}
- (IBAction)addCurrentRegion:(id)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Add Download" message:@"Choose a name for the download:" preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:nil];
[alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil]];
UIAlertAction *downloadAction = [UIAlertAction actionWithTitle:@"Download" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
MGLMapView *mapView = self.mapView;
NSAssert(mapView, @"No map view to get the current region from.");
NSString *name = alertController.textFields.firstObject.text;
if (!name.length) {
name = [NSString stringWithFormat:@"Untitled %lu", (unsigned long)++_untitledRegionCount];
}
MGLTilePyramidOfflineRegion *region = [[MGLTilePyramidOfflineRegion alloc] initWithStyleURL:mapView.styleURL bounds:mapView.visibleCoordinateBounds fromZoomLevel:mapView.zoomLevel toZoomLevel:mapView.maximumZoomLevel];
NSData *context = [NSKeyedArchiver archivedDataWithRootObject:@{
MBXOfflineTaskContextNameKey: name,
}];
__weak MBXDownloadsTableViewController *weakSelf = self;
[[MGLOfflineStorage sharedOfflineStorage] addTaskForRegion:region withContext:context completionHandler:^(MGLOfflineTask *task, NSError *error) {
MBXDownloadsTableViewController *strongSelf = weakSelf;
if (error) {
NSString *message = [NSString stringWithFormat:@"Mapbox GL was unable to add the download “%@”.", name];
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Can’t Add Download" message:message preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil]];
[self presentViewController:alertController animated:YES completion:nil];
} else {
task.delegate = strongSelf;
[task resume];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:strongSelf.offlineTasks.count inSection:0];
[strongSelf.offlineTasks addObject:task];
[strongSelf.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
}];
}];
[alertController addAction:downloadAction];
alertController.preferredAction = downloadAction;
[self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.offlineTasks.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MGLOfflineTask *task = self.offlineTasks[indexPath.row];
NSString *reuseIdentifier = task.state == MGLOfflineTaskStateActive ? MBXDownloadsTableViewActiveCellReuseIdentifier : MBXDownloadsTableViewInactiveCellReuseIdentifier;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier forIndexPath:indexPath];
cell.textLabel.text = task.name;
MGLOfflineTaskProgress progress = task.progress;
NSString *completedString = [NSNumberFormatter localizedStringFromNumber:@(progress.countOfResourcesCompleted)
numberStyle:NSNumberFormatterDecimalStyle];
NSString *expectedString = [NSNumberFormatter localizedStringFromNumber:@(progress.countOfResourcesExpected)
numberStyle:NSNumberFormatterDecimalStyle];
NSString *byteCountString = [NSByteCountFormatter stringFromByteCount:progress.countOfBytesCompleted
countStyle:NSByteCountFormatterCountStyleFile];
NSString *statusString;
switch (task.state) {
case MGLOfflineTaskStateInactive:
case MGLOfflineTaskStateComplete:
statusString = [NSString stringWithFormat:@"%@ of %@ resources (%@)",
completedString, expectedString, byteCountString];
break;
case MGLOfflineTaskStateActive:
if (progress.countOfResourcesExpected) {
completedString = [NSNumberFormatter localizedStringFromNumber:@(progress.countOfResourcesCompleted + 1)
numberStyle:NSNumberFormatterDecimalStyle];
}
if (progress.maximumResourcesExpected > progress.countOfResourcesExpected) {
expectedString = [@"at least " stringByAppendingString:expectedString];
}
statusString = [NSString stringWithFormat:@"Downloading %@ of %@ resources (%@ so far)…",
completedString, expectedString, byteCountString];
break;
}
cell.detailTextLabel.text = statusString;
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
MGLOfflineTask *task = self.offlineTasks[indexPath.row];
__weak MBXDownloadsTableViewController *weakSelf = self;
[[MGLOfflineStorage sharedOfflineStorage] removeTask:task withCompletionHandler:^(NSError *error) {
MBXDownloadsTableViewController *strongSelf = weakSelf;
[strongSelf.offlineTasks removeObjectAtIndex:indexPath.row];
[strongSelf.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}];
}
}
#pragma mark - Offline task delegate
- (void)offlineTask:(MGLOfflineTask *)task progressDidChange:(MGLOfflineTaskProgress)progress {
NSUInteger index = [self.offlineTasks indexOfObject:task];
if (index == NSNotFound) {
return;
}
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];
[self.tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
}
- (void)offlineTask:(MGLOfflineTask *)task didReceiveError:(NSError *)error {
NSLog(@"Offline task “%@” received error: %@", task.name, error.localizedFailureReason);
}
- (void)offlineTask:(MGLOfflineTask *)task didReceiveMaximumAllowedMapboxTiles:(uint64_t)maximumCount {
NSLog(@"Offline task “%@” reached limit of %llu tiles.", task.name, maximumCount);
}
@end
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