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EXPermissions.m
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/
EXPermissions.m
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// Copyright 2016-present 650 Industries. All rights reserved.
#import <UMCore/UMUtilitiesInterface.h>
#import <UMCore/UMUtilities.h>
#import <EXPermissions/EXPermissions.h>
#import <EXPermissions/EXUserNotificationPermissionRequester.h>
#import <EXPermissions/EXRemoteNotificationPermissionRequester.h>
NSString * const EXStatusKey = @"status";
NSString * const EXExpiresKey = @"expires";
NSString * const EXGrantedKey = @"granted";
NSString * const EXCanAskAgain = @"canAskAgain";
NSString * const EXPermissionExpiresNever = @"never";
@interface EXPermissions ()
@property (nonatomic, strong) NSMutableDictionary<NSString *, id<UMPermissionsRequester>> *requesters;
@property (nonatomic, strong) NSMapTable<Class, id<UMPermissionsRequester>> *requestersByClass;
@property (nonatomic, weak) UMModuleRegistry *moduleRegistry;
@end
@implementation EXPermissions
UM_EXPORT_MODULE(ExpoPermissions);
- (instancetype)init
{
if (self = [super init]) {
_requesters = [NSMutableDictionary<NSString *, id<UMPermissionsRequester>> new];
_requestersByClass = [NSMapTable<Class, id<UMPermissionsRequester>> new];
}
return self;
}
+ (const NSArray<Protocol *> *)exportedInterfaces
{
return @[@protocol(UMPermissionsInterface)];
}
- (void)registerRequesters:(NSArray<id<UMPermissionsRequester>> *)newRequesters {
for (id<UMPermissionsRequester> requester in newRequesters) {
[_requesters setObject:requester forKey:[[requester class] permissionType]];
[_requestersByClass setObject:requester forKey:[requester class]];
}
}
- (void)setModuleRegistry:(UMModuleRegistry *)moduleRegistry
{
_moduleRegistry = moduleRegistry;
}
# pragma mark - Exported methods
UM_EXPORT_METHOD_AS(getAsync,
getPermissionWithType:(NSString *)permissionType
resolver:(UMPromiseResolveBlock)resolve
rejecter:(UMPromiseRejectBlock)reject)
{
id<UMPermissionsRequester> requester = [self getPermissionRequesterForType:permissionType];
if (requester == nil) {
return reject(@"E_PERMISSIONS_UNKNOWN", [NSString stringWithFormat:@"Unrecognized permission: %@", permissionType], nil);
}
[self getPermissionUsingRequesterClass:[requester class]
resolve:resolve
reject:reject];
}
UM_EXPORT_METHOD_AS(askAsync,
askAsyncForPermission:(NSString *)permissionType
resolver:(UMPromiseResolveBlock)resolve
rejecter:(UMPromiseRejectBlock)reject)
{
id<UMPermissionsRequester> requester = [self getPermissionRequesterForType:permissionType];
if (requester == nil) {
return reject(@"E_PERMISSIONS_UNKNOWN", [NSString stringWithFormat:@"Unrecognized permission: %@", permissionType], nil);
}
[self askForPermissionUsingRequesterClass:[requester class]
resolve:resolve
reject:reject];
}
# pragma mark - permission requsters / getters
- (void)getPermissionUsingRequesterClass:(Class)requesterClass
resolve:(UMPromiseResolveBlock)resolve
reject:(UMPromiseRejectBlock)reject
{
NSDictionary *permission = [self getPermissionUsingRequesterClass:requesterClass];
if (permission == nil) {
return reject(@"E_PERMISSIONS_UNKNOWN", [NSString stringWithFormat:@"Unrecognized requester: %@", NSStringFromClass(requesterClass)], nil);
}
return resolve(permission);
}
- (NSDictionary *)getPermissionUsingRequesterClass:(Class)requesterClass
{
return [self getPermissionUsingRequester:[self getPermissionRequesterForClass:requesterClass]];
}
- (NSDictionary *)getPermissionsForResource:(NSString *)type
{
return [self getPermissionUsingRequester:[self getPermissionRequesterForType:type]];
}
- (NSDictionary *)getPermissionUsingRequester:(id<UMPermissionsRequester>)requester
{
if (requester) {
return [EXPermissions parsePermissionFromRequester:[requester getPermissions]];
}
return nil;
}
// shorthand method that checks both global and per-experience permission
- (BOOL)hasGrantedPermissionUsingRequesterClass:(Class)requesterClass
{
NSDictionary *permissions = [self getPermissionUsingRequesterClass:requesterClass];
if (!permissions) {
UMLogWarn(@"Permission requester '%@' not found.", NSStringFromClass(requesterClass));
return false;
}
return [permissions[EXStatusKey] isEqualToString:@"granted"];
}
- (void)askForPermissionUsingRequesterClass:(Class)requesterClass
resolve:(UMPromiseResolveBlock)onResult
reject:(UMPromiseRejectBlock)reject
{
NSMutableDictionary *permission = [[self getPermissionUsingRequesterClass:requesterClass] mutableCopy];
// permission type not found - reject immediately
if (permission == nil) {
return reject(@"E_PERMISSIONS_UNKNOWN", [NSString stringWithFormat:@"Unrecognized requester: %@", NSStringFromClass(requesterClass)], nil);
}
BOOL isGranted = [EXPermissions statusForPermission:permission] == UMPermissionStatusGranted;
permission[@"granted"] = @(isGranted);
if (isGranted) {
return onResult(permission);
}
[self askForGlobalPermissionUsingRequesterClass:requesterClass withResolver:onResult withRejecter:reject];
}
- (void)askForGlobalPermissionUsingRequesterClass:(Class)requesterClass
withResolver:(UMPromiseResolveBlock)resolver
withRejecter:(UMPromiseRejectBlock)reject
{
id<UMPermissionsRequester> requester = [self getPermissionRequesterForClass:requesterClass];
if (requester == nil) {
return reject(@"E_PERMISSIONS_UNSUPPORTED", @"Cannot find requester", nil);
}
void (^permissionParser)(NSDictionary *) = ^(NSDictionary * permission){
resolver([EXPermissions parsePermissionFromRequester:permission]);
};
[requester requestPermissionsWithResolver:permissionParser rejecter:reject];
}
# pragma mark - helpers
+ (NSDictionary *)parsePermissionFromRequester:(NSDictionary *)permission
{
NSMutableDictionary *parsedPermission = [permission mutableCopy];
UMPermissionStatus status = (UMPermissionStatus)[permission[EXStatusKey] intValue];
BOOL isGranted = status == UMPermissionStatusGranted;
BOOL canAskAgain = status != UMPermissionStatusDenied;
[parsedPermission setValue:[[self class] permissionStringForStatus:status] forKey:EXStatusKey];
[parsedPermission setValue:EXPermissionExpiresNever forKey:EXExpiresKey];
[parsedPermission setValue:@(isGranted) forKey:EXGrantedKey];
[parsedPermission setValue:@(canAskAgain) forKey:EXCanAskAgain];
return parsedPermission;
}
+ (NSString *)permissionStringForStatus:(UMPermissionStatus)status
{
switch (status) {
case UMPermissionStatusGranted:
return @"granted";
case UMPermissionStatusDenied:
return @"denied";
default:
return @"undetermined";
}
}
+ (UMPermissionStatus)statusForPermission:(NSDictionary *)permission
{
NSString *status = permission[EXStatusKey];
if ([status isEqualToString:@"granted"]) {
return UMPermissionStatusGranted;
} else if ([status isEqualToString:@"denied"]) {
return UMPermissionStatusDenied;
} else {
return UMPermissionStatusUndetermined;
}
}
- (id<UMPermissionsRequester>)getPermissionRequesterForType:(NSString *)type
{
[self ensureRequestersFallbacksAreRegistered];
return _requesters[type];
}
- (id<UMPermissionsRequester>)getPermissionRequesterForClass:(Class)requesterClass
{
return [_requestersByClass objectForKey:requesterClass];
}
- (void)ensureRequestersFallbacksAreRegistered
{
// TODO: Remove once we promote `expo-notifications` to a stable unimodule (and integrate into Expo client)
if (!_requesters[@"userFacingNotifications"]) {
id<UMPermissionsRequester> userNotificationRequester = [[EXUserNotificationPermissionRequester alloc] initWithNotificationProxy:[_moduleRegistry getModuleImplementingProtocol:@protocol(UMUserNotificationCenterProxyInterface)] withMethodQueue:self.methodQueue];
[self registerRequesters:@[userNotificationRequester]];
}
// TODO: Remove once we deprecate and remove "notifications" permission type
if (!_requesters[@"notifications"] && _requesters[@"userFacingNotifications"]) {
id<UMPermissionsRequester> remoteNotificationsRequester = [[EXRemoteNotificationPermissionRequester alloc] initWithUserNotificationPermissionRequester:_requesters[@"userFacingNotifications"] withMethodQueue:self.methodQueue];
[self registerRequesters:@[remoteNotificationsRequester]];
}
}
@end