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Improve round-tripping of CHIP_ERROR through NSError. (project-chip#1…
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…7194)

We can try to reconstruct the original CHIP_ERROR's error code and
location information from the NSError.
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@bzbarsky-apple @andrei-menzopol
bzbarsky-apple authored and andrei-menzopol committed Apr 14, 2022
1 parent 459aca8 commit 5c8cfa7
Showing 1 changed file with 75 additions and 51 deletions.
126 changes: 75 additions & 51 deletions src/darwin/Framework/CHIP/CHIPError.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -41,55 +41,51 @@ + (NSError *)errorForCHIPErrorCode:(CHIP_ERROR)errorCode
return [CHIPError errorForIMStatus:status];
}

if (errorCode == CHIP_ERROR_INVALID_STRING_LENGTH) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeInvalidStringLength
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"A list length is invalid.", nil) }];
}

if (errorCode == CHIP_ERROR_INVALID_INTEGER_VALUE) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeInvalidIntegerValue
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Unexpected integer value.", nil) }];
}

if (errorCode == CHIP_ERROR_INVALID_ARGUMENT) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeInvalidArgument
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"An argument is invalid.", nil) }];
}

if (errorCode == CHIP_ERROR_INVALID_MESSAGE_LENGTH) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeInvalidMessageLength
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"A message length is invalid.", nil) }];
}
NSMutableDictionary * userInfo = [[NSMutableDictionary alloc] init];
CHIPErrorCode code = CHIPErrorCodeGeneralError;

if (errorCode == CHIP_ERROR_INCORRECT_STATE) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeInvalidState
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Invalid object state.", nil) }];
if (errorCode == CHIP_ERROR_INVALID_STRING_LENGTH) {
code = CHIPErrorCodeInvalidStringLength;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"A list length is invalid.", nil) }];
} else if (errorCode == CHIP_ERROR_INVALID_INTEGER_VALUE) {
code = CHIPErrorCodeInvalidIntegerValue;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Unexpected integer value.", nil) }];
} else if (errorCode == CHIP_ERROR_INVALID_ARGUMENT) {
code = CHIPErrorCodeInvalidArgument;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"An argument is invalid.", nil) }];
} else if (errorCode == CHIP_ERROR_INVALID_MESSAGE_LENGTH) {
code = CHIPErrorCodeInvalidMessageLength;
[userInfo
addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"A message length is invalid.", nil) }];
} else if (errorCode == CHIP_ERROR_INCORRECT_STATE) {
code = CHIPErrorCodeInvalidState;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Invalid object state.", nil) }];
} else if (errorCode == CHIP_ERROR_INTEGRITY_CHECK_FAILED) {
code = CHIPErrorCodeIntegrityCheckFailed;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Integrity check failed.", nil) }];
} else if (errorCode == CHIP_ERROR_TIMEOUT) {
code = CHIPErrorCodeTimeout;
[userInfo addEntriesFromDictionary:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Transaction timed out.", nil) }];
} else {
code = CHIPErrorCodeGeneralError;
[userInfo addEntriesFromDictionary:@{
NSLocalizedDescriptionKey :
[NSString stringWithFormat:NSLocalizedString(@"Undefined error:%u.", nil), errorCode.AsInteger()],
@"errorCode" : @(errorCode.AsInteger()),
}];
}

if (errorCode == CHIP_ERROR_INTEGRITY_CHECK_FAILED) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeIntegrityCheckFailed
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Integrity check failed.", nil) }];
#if CHIP_CONFIG_ERROR_SOURCE
if (errorCode.GetFile()) {
userInfo[@"errorFile"] = [NSString stringWithUTF8String:errorCode.GetFile()];
}

if (errorCode == CHIP_ERROR_TIMEOUT) {
return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeTimeout
userInfo:@{ NSLocalizedDescriptionKey : NSLocalizedString(@"Transaction timed out.", nil) }];
if (errorCode.GetLine()) {
userInfo[@"errorLine"] = @(errorCode.GetLine());
}
#endif // CHIP_CONFIG_ERROR_SOURCE

return [NSError errorWithDomain:CHIPErrorDomain
code:CHIPErrorCodeGeneralError
userInfo:@{
NSLocalizedDescriptionKey : [NSString
stringWithFormat:NSLocalizedString(@"Undefined error:%u.", nil), errorCode.AsInteger()],
@"errorCode" : @(errorCode.AsInteger()),
}];
return [NSError errorWithDomain:CHIPErrorDomain code:code userInfo:userInfo];
;
}

Expand Down Expand Up @@ -220,7 +216,7 @@ + (CHIP_ERROR)errorToCHIPErrorCode:(NSError * _Nullable)error

if (error.domain == MatterInteractionErrorDomain) {
chip::app::StatusIB status(static_cast<chip::Protocols::InteractionModel::Status>(error.code));
if (error.userInfo[@"clusterStatus"] != nil) {
if (error.userInfo != nil && error.userInfo[@"clusterStatus"] != nil) {
status.mClusterStatus.Emplace([error.userInfo[@"clusterStatus"] unsignedCharValue]);
}
return status.ToChipError();
Expand All @@ -230,24 +226,52 @@ + (CHIP_ERROR)errorToCHIPErrorCode:(NSError * _Nullable)error
return CHIP_ERROR_INTERNAL;
}

chip::ChipError::StorageType code;
switch (error.code) {
case CHIPErrorCodeInvalidStringLength:
return CHIP_ERROR_INVALID_STRING_LENGTH;
code = CHIP_ERROR_INVALID_STRING_LENGTH.AsInteger();
break;
case CHIPErrorCodeInvalidIntegerValue:
return CHIP_ERROR_INVALID_INTEGER_VALUE;
code = CHIP_ERROR_INVALID_INTEGER_VALUE.AsInteger();
break;
case CHIPErrorCodeInvalidArgument:
return CHIP_ERROR_INVALID_ARGUMENT;
code = CHIP_ERROR_INVALID_ARGUMENT.AsInteger();
break;
case CHIPErrorCodeInvalidMessageLength:
return CHIP_ERROR_INVALID_MESSAGE_LENGTH;
code = CHIP_ERROR_INVALID_MESSAGE_LENGTH.AsInteger();
break;
case CHIPErrorCodeInvalidState:
return CHIP_ERROR_INCORRECT_STATE;
code = CHIP_ERROR_INCORRECT_STATE.AsInteger();
break;
case CHIPErrorCodeIntegrityCheckFailed:
return CHIP_ERROR_INTEGRITY_CHECK_FAILED;
code = CHIP_ERROR_INTEGRITY_CHECK_FAILED.AsInteger();
break;
case CHIPErrorCodeTimeout:
return CHIP_ERROR_TIMEOUT;
code = CHIP_ERROR_TIMEOUT.AsInteger();
break;
case CHIPErrorCodeGeneralError: {
if (error.userInfo != nil && error.userInfo[@"errorCode"] != nil) {
code = static_cast<decltype(code)>([error.userInfo[@"errorCode"] unsignedLongValue]);
break;
}
// Weird error we did not create. Fall through.
default:
return CHIP_ERROR_INTERNAL;
code = CHIP_ERROR_INTERNAL.AsInteger();
break;
}
}

const char * file = nullptr;
unsigned int line = 0;
if (error.userInfo != nil) {
if (error.userInfo[@"errorFile"] != nil) {
file = [error.userInfo[@"errorFile"] cStringUsingEncoding:NSUTF8StringEncoding];
}
if (error.userInfo[@"errorLine"] != nil) {
line = [error.userInfo[@"errorLine"] unsignedIntValue];
}
}
return chip::ChipError(code, file, line);
}

@end

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