session-ios/SignalUtilitiesKit/NSError+MessageSending.m

//
//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//

#import "NSError+MessageSending.h"
#import <objc/runtime.h>

NS_ASSUME_NONNULL_BEGIN

static void *kNSError_MessageSender_IsRetryable = &kNSError_MessageSender_IsRetryable;
static void *kNSError_MessageSender_ShouldBeIgnoredForGroups = &kNSError_MessageSender_ShouldBeIgnoredForGroups;
static void *kNSError_MessageSender_IsFatal = &kNSError_MessageSender_IsFatal;

// isRetryable and isFatal are opposites but not redundant.
//
// If a group message send fails, the send will be retried if any of the errors were retryable UNLESS
// any of the errors were fatal.  Fatal errors trump retryable errors.
@implementation NSError (MessageSending)

- (BOOL)isRetryable
{
    NSNumber *value = objc_getAssociatedObject(self, kNSError_MessageSender_IsRetryable);
    // This value should always be set for all errors by the time OWSSendMessageOperation
    // queries it's value. If not, default to retrying in production.
    return value ? [value boolValue] : YES;
}

- (void)setIsRetryable:(BOOL)value
{
    objc_setAssociatedObject(self, kNSError_MessageSender_IsRetryable, @(value), OBJC_ASSOCIATION_COPY);
}

- (BOOL)shouldBeIgnoredForGroups
{
    NSNumber *value = objc_getAssociatedObject(self, kNSError_MessageSender_ShouldBeIgnoredForGroups);
    // This value will NOT always be set for all errors by the time we query it's value.
    // Default to NOT ignoring.
    return value ? [value boolValue] : NO;
}

- (void)setShouldBeIgnoredForGroups:(BOOL)value
{
    objc_setAssociatedObject(self, kNSError_MessageSender_ShouldBeIgnoredForGroups, @(value), OBJC_ASSOCIATION_COPY);
}

- (BOOL)isFatal
{
    NSNumber *value = objc_getAssociatedObject(self, kNSError_MessageSender_IsFatal);
    // This value will NOT always be set for all errors by the time we query it's value.
    // Default to NOT fatal.
    return value ? [value boolValue] : NO;
}

- (void)setIsFatal:(BOOL)value
{
    objc_setAssociatedObject(self, kNSError_MessageSender_IsFatal, @(value), OBJC_ASSOCIATION_COPY);
}

@end

NS_ASSUME_NONNULL_END