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/*
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* Copyright 2019 Google
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import <TargetConditionals.h>
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#if TARGET_OS_IOS || TARGET_OS_TV
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#import "FirebaseInAppMessaging/Sources/Private/Util/NSString+FIRInterlaceStrings.h"
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@implementation NSString (InterlaceStrings)
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+ (NSString *)fir_interlaceString:(NSString *)stringOne withString:(NSString *)stringTwo {
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NSMutableString *interlacedString = [NSMutableString string];
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NSUInteger count = MAX(stringOne.length, stringTwo.length);
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for (NSUInteger i = 0; i < count; i++) {
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if (i < stringOne.length) {
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NSString *firstComponentChar =
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[NSString stringWithFormat:@"%c", [stringOne characterAtIndex:i]];
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[interlacedString appendString:firstComponentChar];
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}
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if (i < stringTwo.length) {
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NSString *secondComponentChar =
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[NSString stringWithFormat:@"%c", [stringTwo characterAtIndex:i]];
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[interlacedString appendString:secondComponentChar];
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}
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}
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return interlacedString;
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}
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@end
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#endif // TARGET_OS_IOS || TARGET_OS_TV
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