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///
/// Copyright (c) 2016 Dropbox, Inc. All rights reserved.
///
#import "DBStoneSerializers.h"
#import "DBStoneValidators.h"
static NSDateFormatter *sFormatter = nil;
static NSString *sDateFormat = nil;
@implementation DBNSDateSerializer
+ (void)initialize
{
if (self == [DBNSDateSerializer class]) {
sFormatter = [[NSDateFormatter alloc] init];
[sFormatter setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];
[sFormatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"]];
}
}
+ (NSString *)serialize:(NSDate *)value dateFormat:(NSString *)dateFormat
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
@synchronized (sFormatter) {
if (![dateFormat isEqualToString:sDateFormat]) {
[sFormatter setDateFormat:[self convertFormat:dateFormat]];
sDateFormat = [dateFormat copy];
}
return [sFormatter stringFromDate:value];
}
}
+ (NSDate *)deserialize:(NSString *)value dateFormat:(NSString *)dateFormat
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
@synchronized (sFormatter) {
if (![dateFormat isEqualToString:sDateFormat]) {
[sFormatter setDateFormat:[self convertFormat:dateFormat]];
sDateFormat = [dateFormat copy];
}
return [sFormatter dateFromString:value];
}
}
+ (NSString *)formatDateToken:(NSString *)token
{
NSString *result = @"";
if ([token isEqualToString:@"%a"]) { // Weekday as locale's abbreviated name.
result = @"EEE";
} else if ([token isEqualToString:@"%A"]) { // Weekday as locale's full name.
result = @"EEE";
} else if ([token isEqualToString:@"%w"]) { // Weekday as a decimal number, where 0 is Sunday and 6 is Saturday. 0, 1,
// ..., 6
result = @"ccccc";
} else if ([token isEqualToString:@"%d"]) { // Day of the month as a zero-padded decimal number. 01, 02, ..., 31
result = @"dd";
} else if ([token isEqualToString:@"%b"]) { // Month as locale's abbreviated name.
result = @"MMM";
} else if ([token isEqualToString:@"%B"]) { // Month as locale's full name.
result = @"MMMM";
} else if ([token isEqualToString:@"%m"]) { // Month as a zero-padded decimal number. 01, 02, ..., 12
result = @"MM";
} else if ([token isEqualToString:@"%y"]) { // Year without century as a zero-padded decimal number. 00, 01, ..., 99
result = @"yy";
} else if ([token isEqualToString:@"%Y"]) { // Year with century as a decimal number. 1970, 1988, 2001, 2013
result = @"yyyy";
} else if ([token isEqualToString:@"%H"]) { // Hour (24-hour clock) as a zero-padded decimal number. 00, 01, ..., 23
result = @"HH";
} else if ([token isEqualToString:@"%I"]) { // Hour (12-hour clock) as a zero-padded decimal number. 01, 02, ..., 12
result = @"hh";
} else if ([token isEqualToString:@"%p"]) { // Locale's equivalent of either AM or PM.
result = @"a";
} else if ([token isEqualToString:@"%M"]) { // Minute as a zero-padded decimal number. 00, 01, ..., 59
result = @"mm";
} else if ([token isEqualToString:@"%S"]) { // Second as a zero-padded decimal number. 00, 01, ..., 59
result = @"ss";
} else if ([token isEqualToString:@"%f"]) { // Microsecond as a decimal number, zero-padded on the left. 000000,
// 000001, ..., 999999
result = @"SSSSSS";
} else if ([token isEqualToString:@"%z"]) { // UTC offset in the form +HHMM or -HHMM (empty string if the the object
// is naive). (empty), +0000, -0400, +1030
result = @"Z";
} else if ([token isEqualToString:@"%Z"]) { // Time zone name (empty string if the object is naive). (empty), UTC,
// EST, CST
result = @"z";
} else if ([token isEqualToString:@"%j"]) { // Day of the year as a zero-padded decimal number. 001, 002, ..., 366
result = @"DDD";
} else if ([token isEqualToString:@"%U"]) { // Week number of the year (Sunday as the first day of the week) as a zero
// padded decimal number. All days in a new year preceding the first
// Sunday are considered to be in week 0. 00, 01, ..., 53 (6)
result = @"ww";
} else if ([token isEqualToString:@"%W"]) { // Week number of the year (Monday as the first day of the week) as a
// decimal number. All days in a new year preceding the first Monday are
// considered to be in week 0. 00, 01, ..., 53 (6)
result = @"ww";
} else if ([token isEqualToString:@"%c"]) { // Locale's appropriate date and time representation.
result = @""; // unsupported
} else if ([token isEqualToString:@"%x"]) { // Locale's appropriate date representation.
result = @""; // unsupported
} else if ([token isEqualToString:@"%X"]) { // Locale's appropriate time representation.
result = @""; // unsupported
} else if ([token isEqualToString:@"%%"]) { // A literal '%' character.
result = @"";
} else if ([token isEqualToString:@"%"]) {
result = @"";
} else {
result = @"";
}
return result;
}
+ (NSString *)convertFormat:(NSString *)format
{
NSCharacterSet *alphabeticSet =
[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"];
NSMutableString *newFormat = [@"" mutableCopy];
BOOL inQuotedText = NO;
NSUInteger len = [format length];
NSUInteger i = 0;
while (i < len) {
char ch = (char)[format characterAtIndex:i];
if (ch == '%') {
if (i >= len - 1) {
return nil;
}
i++;
ch = (char)[format characterAtIndex:i];
NSString *token = [NSString stringWithFormat:@"%%%c", ch];
if (inQuotedText) {
[newFormat appendString:@"'"];
inQuotedText = NO;
}
[newFormat appendString:[self formatDateToken:token]];
} else {
if ([alphabeticSet characterIsMember:ch]) {
if (!inQuotedText) {
[newFormat appendString:@"'"];
inQuotedText = YES;
}
} else if (ch == '\'') {
[newFormat appendString:@"'"];
}
[newFormat appendString:[NSString stringWithFormat:@"%c", ch]];
}
i++;
}
if (inQuotedText) {
[newFormat appendString:@"'"];
}
return newFormat;
}
@end
@implementation DBArraySerializer
+ (NSArray *)serialize:(NSArray *)value withBlock:(id (^)(id))serializeBlock
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
NSMutableArray *resultArray = [[NSMutableArray alloc] init];
for (id element in value) {
[resultArray addObject:serializeBlock(element)];
}
return resultArray;
}
+ (NSArray *)deserialize:(NSArray *)value withBlock:(id (^)(id))deserializeBlock
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
NSMutableArray *resultArray = [[NSMutableArray alloc] init];
for (id element in value) {
[resultArray addObject:deserializeBlock(element)];
}
return resultArray;
}
@end
@implementation DBMapSerializer
+ (NSDictionary *)serialize:(NSDictionary *)value withBlock:(id (^)(id))serializeBlock
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
NSMutableDictionary *resultDict = [[NSMutableDictionary alloc] init];
for (id key in value) {
[resultDict setObject:serializeBlock(value[key]) forKey:key];
}
return resultDict;
}
+ (NSDictionary *)deserialize:(NSDictionary *)value withBlock:(id (^)(id))deserializeBlock
{
if (value == nil) {
[DBStoneValidators raiseIllegalStateErrorWithMessage:@"Value must not be `nil`"];
}
NSMutableDictionary *resultDict = [[NSMutableDictionary alloc] init];
for (id key in value) {
[resultDict setObject:deserializeBlock(value[key]) forKey:key];
}
return resultDict;
}
@end
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