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#import "Firestore/third_party/Immutable/FSTArraySortedDictionaryEnumerator.h"
NS_ASSUME_NONNULL_BEGIN
// clang-format off
// For some reason, clang-format messes this line up...
@interface FSTArraySortedDictionaryEnumerator<KeyType, ValueType> ()
@property(nonatomic, assign) int pos;
@property(nonatomic, assign) int start;
@property(nonatomic, assign) int end;
@property(nonatomic, assign) BOOL reverse;
@property(nonatomic, strong) NSArray<KeyType> *keys;
@end
// clang-format on
@implementation FSTArraySortedDictionaryEnumerator
- (id)initWithKeys:(NSArray *)keys startPos:(int)start endPos:(int)end isReverse:(BOOL)reverse {
self = [super init];
if (self != nil) {
_keys = keys;
_start = start;
_end = end;
_pos = start;
_reverse = reverse;
}
return self;
}
- (nullable id)nextObject {
if (self.pos < 0 || self.pos >= self.keys.count) {
return nil;
}
if (self.reverse) {
if (self.pos <= self.end) {
return nil;
}
} else {
if (self.pos >= self.end) {
return nil;
}
}
int pos = self.pos;
if (self.reverse) {
self.pos--;
} else {
self.pos++;
}
return self.keys[pos];
}
@end
NS_ASSUME_NONNULL_END
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