react-native-firebase/ios/RNFirebase/RNFirebaseAdMob.m

#import "RNFirebaseAdMob.h"
#import "GoogleMobileAds/GADMobileAds.h"

#import "RNFirebaseAdMobInterstitial.h"

NSString *MALE = @"male";
NSString *FEMALE = @"female";
NSString *UNKNOWN = @"unknown";

@implementation RNFirebaseAdMob
RCT_EXPORT_MODULE();

- (id)init {
    self = [super init];
    if (self != nil) {
        _interstitials = [[NSMutableDictionary alloc] init];
    }
    return self;
}

- (dispatch_queue_t)methodQueue {
    return dispatch_get_main_queue();
}

RCT_EXPORT_METHOD(initialize:
    (NSString *) appId) {
    [GADMobileAds configureWithApplicationID:appId];
}

RCT_EXPORT_METHOD(interstitialShowAd:
    (NSString *) adUnit) {
    RNFirebaseAdMobInterstitial *interstitial = [self getOrCreateInterstitial:adUnit];
    [interstitial showAd];
}

RCT_EXPORT_METHOD(interstitialLoadAd:
    (NSString *) adUnit
            request:
            (NSDictionary *) request) {
    RNFirebaseAdMobInterstitial *interstitial = [self getOrCreateInterstitial:adUnit];
    [interstitial loadAd:request];
}


- (RNFirebaseAdMobInterstitial *)getOrCreateInterstitial:(NSString *)adUnit {
    if (_interstitials[adUnit]) {
        return _interstitials[adUnit];
    }

    _interstitials[adUnit] = [[RNFirebaseAdMobInterstitial alloc] initWithProps:adUnit delegate:self];
    return _interstitials[adUnit];
}

- (NSArray<NSString *> *)supportedEvents {
    return @[ADMOB_INTERSTITIAL_EVENT, ADMOB_REWARDED_VIDEO_EVENT];
}

- (GADRequest *)buildRequest:(NSDictionary *)request {
    GADRequest *builder = [GADRequest request];

    if (request[@"tagForChildDirectedTreatment"]) [builder tagForChildDirectedTreatment:(BOOL) request[@"tagForChildDirectedTreatment"]];
    if (request[@"contentUrl"]) builder.contentURL = request[@"contentUrl"];
    if (request[@"requestAgent"]) builder.requestAgent = request[@"requestAgent"];
    if (request[@"keywords"]) builder.keywords = request[@"keywords"];
    if (request[@"testDevices"]) builder.testDevices = request[@"testDevices"];

    if (request[@"gender"]) {
        NSString *gender = [request[@"gender"] stringValue];

        if (gender == MALE) {
            builder.gender = kGADGenderMale;
        } else if (gender == FEMALE) {
            builder.gender = kGADGenderFemale;
        } else if (gender == UNKNOWN) {
            builder.gender = kGADGenderUnknown;
        }
    }

    return builder;
}

- (NSDictionary *)errorCodeToDictionary:(NSError *)error {
    NSString *code;
    NSString *message;

    switch (error.code) {
        default:
        case kGADErrorServerError:
        case kGADErrorInternalError:
        case kGADErrorInvalidArgument:
        case kGADErrorMediationDataError:
        case kGADErrorMediationAdapterError:
            code = @"admob/error-code-internal-error ";
            message = @"Something happened internally; for instance, an invalid response was received from the ad server.";
            break;
        case kGADErrorMediationInvalidAdSize:
            code = @"admob/error-code-invalid-request";
            message = @"The ad requested has an invalid size.";
            break;
        case kGADErrorInvalidRequest:
        case kGADErrorReceivedInvalidResponse:
            code = @"admob/error-code-invalid-request";
            message = @"The ad request was invalid; for instance, the ad unit ID was incorrect.";
            break;
        case kGADErrorNoFill:
        case kGADErrorMediationNoFill:
            code = @"admob/error-code-no-fill";
            message = @"The ad request was successful, but no ad was returned due to lack of ad inventory.";
            break;
        case kGADErrorNetworkError:
            code = @"admob/error-code-network-error";
            message = @"The ad request was unsuccessful due to network connectivity.";
            break;
        case kGADErrorOSVersionTooLow:
            code = @"admob/os-version-too-low";
            message = @"The current device’s OS is below the minimum required version.";
            break;
    }

    return @{
            @"code": code,
            @"message": message,
    };
}

@end