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//
// Unit.m
// BitStore
//
// Created by Dylan Marriott on 20.07.14.
// Copyright (c) 2014 Dylan Marriott. All rights reserved.
//
#import "Unit.h"
static NSArray* units;
@implementation Unit
- (id)initWithType:(UnitType)type {
if (self = [super init]) {
self.type = type;
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder {
if (self = [super init]) {
self.type = (int)[aDecoder decodeIntegerForKey:@"type"];
}
return self;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeInteger:self.type forKey:@"type"];
}
- (NSString *)displayName {
NSString* ret = @"";
switch (self.type) {
case btc:
ret = @"BTC";
break;
case mbtc:
ret = @"mBTC";
break;
case ubtc:
ret = @"μBTC";
break;
default:
break;
}
return ret;
}
- (NSString *)technicalName {
NSString* ret = @"";
switch (self.type) {
case btc:
ret = @"btc";
break;
case mbtc:
ret = @"mbtc";
break;
case ubtc:
ret = @"ubtc";
break;
default:
break;
}
return ret;
}
- (NSString *)valueForSatoshi:(BTCSatoshi)satoshi {
return [self valueForSatoshi:satoshi round:YES];
}
- (NSString *)valueForSatoshi:(BTCSatoshi)satoshi round:(BOOL)round {
return [self valueForSatoshi:satoshi round:round showUnit:YES];
}
- (NSString *)valueForSatoshi:(BTCSatoshi)satoshi round:(BOOL)round showUnit:(BOOL)showUnit {
NSString* value = 0;
NSString* unit = @"";
double factor = [self factor];
int decimalPlaces = 0;
switch (self.type) {
case btc:
decimalPlaces = 4;
unit = @"BTC";
break;
case mbtc:
decimalPlaces = 2;
unit = @"mBTC";
break;
case ubtc:
decimalPlaces = 0;
unit = @"μBTC";
break;
default:
break;
}
if (!round) {
decimalPlaces += 1;
}
if (decimalPlaces > 0) {
NSString* format = [NSString stringWithFormat:@"%%.%if", decimalPlaces];
value = [NSString stringWithFormat:format, satoshi / factor];
} else {
value = [NSString stringWithFormat:@"%.0f", roundf(satoshi / factor)];
}
if (!round) {
if (decimalPlaces == 1) {
value = [value substringToIndex:value.length - 2];
} else {
value = [value substringToIndex:value.length - 1];
}
}
if (showUnit) {
return [NSString stringWithFormat:@"%@ %@", value, unit];
} else {
return value;
}
}
- (double)factor {
long ret = 1;
switch (self.type) {
case btc:
ret = 100000000.0f;
break;
case mbtc:
ret = 100000.0f;
break;
case ubtc:
ret = 100.0f;
break;
default:
break;
}
return ret;
}
- (int)maxFraction {
int maxFraction;
switch (self.type) {
case btc:
maxFraction = 8;
break;
case mbtc:
maxFraction = 5;
break;
case ubtc:
maxFraction = 2;
break;
default:
break;
}
return maxFraction;
}
- (BOOL)isEqual:(id)object {
return self.type == ((Unit *)object).type;
}
+ (NSArray *)availableTypes {
if (units == nil) {
units = [NSArray arrayWithObjects:[[Unit alloc] initWithType:btc], [[Unit alloc] initWithType:mbtc], [[Unit alloc] initWithType:ubtc], nil];
}
return units;
}
@end