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/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "Firestore/Source/API/FIRFieldPath+Internal.h"
#import "Firestore/Source/Model/FSTPath.h"
#import "Firestore/Source/Util/FSTUsageValidation.h"
NS_ASSUME_NONNULL_BEGIN
@implementation FIRFieldPath
- (instancetype)initWithFields:(NSArray<NSString *> *)fieldNames {
if (fieldNames.count == 0) {
FSTThrowInvalidArgument(@"Invalid field path. Provided names must not be empty.");
}
for (int i = 0; i < fieldNames.count; ++i) {
if (fieldNames[i].length == 0) {
FSTThrowInvalidArgument(@"Invalid field name at index %d. Field names must not be empty.", i);
}
}
return [self initPrivate:[FSTFieldPath pathWithSegments:fieldNames]];
}
+ (instancetype)documentID {
return [[FIRFieldPath alloc] initPrivate:FSTFieldPath.keyFieldPath];
}
- (instancetype)initPrivate:(FSTFieldPath *)fieldPath {
if (self = [super init]) {
_internalValue = fieldPath;
}
return self;
}
+ (instancetype)pathWithDotSeparatedString:(NSString *)path {
if ([[FIRFieldPath reservedCharactersRegex]
numberOfMatchesInString:path
options:0
range:NSMakeRange(0, path.length)] > 0) {
FSTThrowInvalidArgument(
@"Invalid field path (%@). Paths must not contain '~', '*', '/', '[', or ']'", path);
}
@try {
return [[FIRFieldPath alloc] initWithFields:[path componentsSeparatedByString:@"."]];
} @catch (NSException *exception) {
FSTThrowInvalidArgument(
@"Invalid field path (%@). Paths must not be empty, begin with '.', end with '.', or "
@"contain '..'",
path);
}
}
/** Matches any characters in a field path string that are reserved. */
+ (NSRegularExpression *)reservedCharactersRegex {
static NSRegularExpression *regex = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
regex = [NSRegularExpression regularExpressionWithPattern:@"[~*/\\[\\]]" options:0 error:nil];
});
return regex;
}
- (id)copyWithZone:(NSZone *__nullable)zone {
return [[[self class] alloc] initPrivate:self.internalValue];
}
- (BOOL)isEqual:(id)object {
if (self == object) {
return YES;
}
if (![object isKindOfClass:[FIRFieldPath class]]) {
return NO;
}
return [self.internalValue isEqual:((FIRFieldPath *)object).internalValue];
}
- (NSUInteger)hash {
return [self.internalValue hash];
}
@end
NS_ASSUME_NONNULL_END
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