Skip to content
This repository
tree: 4222a96271
Fetching contributors…

Cannot retrieve contributors at this time

file 328 lines (283 sloc) 14.171 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328
/*
CurrencyManager.m
AppSalesMobile
* Copyright (c) 2008, omz:software
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY omz:software ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#import "CurrencyManager.h"


@implementation CurrencyManager

@synthesize lastRefresh;
@synthesize exchangeRates;
@synthesize availableCurrencies;
@synthesize conversionDict;

- (id)init
{
if (!(self=[super init])) {
return nil;
}

numberFormatterWithFraction = [NSNumberFormatter new];
[numberFormatterWithFraction setMinimumFractionDigits:2];
[numberFormatterWithFraction setMaximumFractionDigits:2];
[numberFormatterWithFraction setMinimumIntegerDigits:1];

numberFormatterWithoutFraction = [NSNumberFormatter new];
[numberFormatterWithoutFraction setMinimumFractionDigits:0];
[numberFormatterWithoutFraction setMaximumFractionDigits:0];
[numberFormatterWithoutFraction setMinimumIntegerDigits:1];

self.availableCurrencies = [NSArray arrayWithObjects:
@"USD", @"EUR",
@"AED", @"AUD",
@"BHD", @"BND", @"BRL",
@"CAD", @"CHF", @"CLP", @"CNY", @"CZK",
@"DKK",
@"GBP",
@"HUF", @"HKD",
@"IDR", @"ILS", @"INR", @"ISK",
@"JPY",
@"KRW", @"KWD", @"KZT",
@"LKR",
@"MUR", @"MXN", @"MYR",
@"NOK", @"NPR", @"NZD",
@"OMR",
@"PKR",
@"QAR",
@"RUB",
@"SAR", @"SEK", @"SGD",
@"THB", @"TWD",
@"ZAR", nil];

currencySymbols = [[NSDictionary alloc] initWithObjectsAndKeys:@"€", @"EUR", @"$", @"USD", @"¥", @"JPY", @"£", @"GBP", @"₪", @"ILS", nil];

isRefreshing = NO;
self.baseCurrency = [[NSUserDefaults standardUserDefaults] objectForKey:@"CurrencyManagerBaseCurrency"];
if (!self.baseCurrency) self.baseCurrency = @"USD";

self.lastRefresh = [[NSUserDefaults standardUserDefaults] objectForKey:@"CurrencyManagerLastRefresh"];
if (!self.lastRefresh) self.lastRefresh = [NSDate dateWithTimeIntervalSince1970:1225397963]; //Oct, 30, 2008

exchangeRates = [[[NSUserDefaults standardUserDefaults] objectForKey:@"CurrencyManagerExchangeRates"] retain];
if (!exchangeRates) {
exchangeRates = [NSMutableDictionary new];
[exchangeRates setObject:[NSNumber numberWithFloat:0.2178] forKey:@"\"AED to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.5096] forKey:@"\"AUD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:2.1227] forKey:@"\"BHD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.5519] forKey:@"\"BND to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.3351] forKey:@"\"BRL to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.6378] forKey:@"\"CAD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.6605] forKey:@"\"CHF to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0012] forKey:@"\"CLP to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.1171] forKey:@"\"CNY to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:2.0112] forKey:@"\"CYP to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0389] forKey:@"\"CZK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.1343] forKey:@"\"DKK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:1.0000] forKey:@"\"EUR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:1.1968] forKey:@"\"GBP to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.1033] forKey:@"\"HKD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0037] forKey:@"\"HUF to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0001] forKey:@"\"IDR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.2003] forKey:@"\"ILS to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0159] forKey:@"\"INR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0036] forKey:@"\"ISK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0084] forKey:@"\"JPY to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0006] forKey:@"\"KRW to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:2.9416] forKey:@"\"KWD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0067] forKey:@"\"KZT to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0073] forKey:@"\"LKR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:2.7266] forKey:@"\"MTL to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0246] forKey:@"\"MUR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0592] forKey:@"\"MXN to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.221] forKey:@"\"MYR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.11335] forKey:@"\"NOK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0101] forKey:@"\"NPR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.4338] forKey:@"\"NZD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:2.0786] forKey:@"\"OMR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0101] forKey:@"\"PKR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.2198] forKey:@"\"QAR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.029] forKey:@"\"RUB to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.2134] forKey:@"\"SAR to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0978] forKey:@"\"SEK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.5226] forKey:@"\"SGD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0329] forKey:@"\"SKK to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0228] forKey:@"\"THB to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.024] forKey:@"\"TWD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.8003] forKey:@"\"USD to EUR\""];
[exchangeRates setObject:[NSNumber numberWithFloat:0.0764] forKey:@"\"ZAR to EUR\""];
[self forceRefresh];
}

conversionDict = [NSMutableDictionary new];

return self;
}

- (NSString*) baseCurrency
{
return baseCurrency;
}

- (void)setBaseCurrency:(NSString *)newBaseCurrency
{
[self.conversionDict removeAllObjects];

[newBaseCurrency retain];
[baseCurrency release];
baseCurrency = newBaseCurrency;
[[NSUserDefaults standardUserDefaults] setObject:baseCurrency forKey:@"CurrencyManagerBaseCurrency"];

[[NSNotificationCenter defaultCenter] postNotificationName:CurrencyManagerDidChangeBaseCurrencyNotification object:self];
}

- (NSString *)baseCurrencyDescription
{
NSString *currencySymbol = [currencySymbols objectForKey:baseCurrency];
return (currencySymbol != nil) ? currencySymbol : baseCurrency;
}

- (NSString *)currencySymbolForCurrency:(NSString *)currencyCode
{
NSString *currencySymbol = [currencySymbols objectForKey:currencyCode];
return (currencySymbol != nil) ? currencySymbol : currencyCode;
}

- (NSString *)baseCurrencyDescriptionForAmount:(NSString *)amount
{
return [NSString stringWithFormat:@"%@%@", [self baseCurrencyDescription], amount];
}

- (NSString *)baseCurrencyDescriptionForAmount:(NSNumber *)amount withFraction:(BOOL)withFraction
{
NSNumberFormatter *numberFormatter = (withFraction) ? (numberFormatterWithFraction) : (numberFormatterWithoutFraction);
NSString *formattedAmount = [numberFormatter stringFromNumber:amount];
return [self baseCurrencyDescriptionForAmount:formattedAmount];
}

- (void)refreshIfNeeded
{
if (!isRefreshing && ([[NSDate date] timeIntervalSinceDate:self.lastRefresh] > 21600)) {
isRefreshing = YES;
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
[self performSelectorInBackground:@selector(refreshExchangeRates) withObject:nil];
}
}

- (void)forceRefresh
{
if (!isRefreshing) {
isRefreshing = YES;
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES];
[self performSelectorInBackground:@selector(refreshExchangeRates) withObject:nil];
}
}

- (void)refreshFailed
{
isRefreshing = NO;
[self.conversionDict removeAllObjects];
[[NSNotificationCenter defaultCenter] postNotificationName:CurrencyManagerErrorNotification object:self];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
}

- (void)finishRefreshWithExchangeRates:(NSMutableDictionary *)newExchangeRates
{
isRefreshing = NO;
self.exchangeRates = newExchangeRates;
self.lastRefresh = [NSDate date];
[self.conversionDict removeAllObjects];

[[NSUserDefaults standardUserDefaults] setObject:self.exchangeRates forKey:@"CurrencyManagerExchangeRates"];
[[NSUserDefaults standardUserDefaults] setObject:self.lastRefresh forKey:@"CurrencyManagerLastRefresh"];
[[NSNotificationCenter defaultCenter] postNotificationName:CurrencyManagerDidUpdateNotification object:self];
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
}

- (void)refreshExchangeRates
{
NSAutoreleasePool *pool = [NSAutoreleasePool new];
NSMutableDictionary *newExchangeRates = [NSMutableDictionary dictionary];

[newExchangeRates setObject:[NSNumber numberWithFloat:1.0] forKey:@"\"EUR to EUR\""];

NSMutableString *urlString = [NSMutableString stringWithString:@"http://quote.yahoo.com/d/quotes.csv?s="];
int i = 0;
for (NSString *currency in self.availableCurrencies) {
if (i > 0) {
[urlString appendString:@"+"];
}
if (![currency isEqual:@"EUR"]) {
[urlString appendFormat:@"%@%@=X", currency, @"EUR"];
}
i++;
}
[urlString appendString:@"&f=nl1"];

NSString *csv = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] usedEncoding:NULL error:NULL];
if (!csv) {
[self performSelectorOnMainThread:@selector(refreshFailed) withObject:nil waitUntilDone:YES];
[pool release];
return;
}
NSArray *lines = [csv componentsSeparatedByString:@"\n"];
for (NSString *line in lines) {
NSArray *comps = [line componentsSeparatedByString:@","];
if ([comps count] == 2) {
NSString *currenciesString = [comps objectAtIndex:0]; //ex: "USD to EUR"
float exchangeRate = [[comps objectAtIndex:1] floatValue];

[newExchangeRates setObject:[NSNumber numberWithFloat:exchangeRate] forKey:currenciesString];
}
}
if (fabsf([[newExchangeRates objectForKey:@"\"USD to EUR\""] floatValue]) > 9999) {
//Yes, this could theoretically happen, but more likely,
//Yahoo returned bogus values, which apparently does happen every now and then...
NSLog(@"Exchange rates returned by Yahoo are likely incorrect, ignoring...");
[self performSelectorOnMainThread:@selector(refreshFailed) withObject:nil waitUntilDone:YES];
[pool release];
return;
}
[self performSelectorOnMainThread:@selector(finishRefreshWithExchangeRates:) withObject:newExchangeRates waitUntilDone:YES];
[pool release];
}

- (float)convertValue:(float)sourceValue fromCurrency:(NSString *)sourceCurrency
{
/* short-circuit if the source is the same as the destination */
if ([sourceCurrency isEqualToString:self.baseCurrency])
return sourceValue;

NSNumber *conversionFromSourceCurrency = [self.conversionDict objectForKey:sourceCurrency];
float conversionFactor;

if (conversionFromSourceCurrency) {
conversionFactor = [conversionFromSourceCurrency floatValue];

} else {
/* Convert to euros, our universal common factor */
NSNumber *conversionRateEuroNumber = [exchangeRates objectForKey:[NSString stringWithFormat:@"\"%@ to EUR\"", sourceCurrency]];
if (!conversionRateEuroNumber) {
//NSLog(@"Error: Currency code not found or exchange rates not downloaded yet");
return 0.0;
}

conversionFactor = [conversionRateEuroNumber floatValue];
if (![self.baseCurrency isEqualToString:@"EUR"]) {
/* If the destination currency isn't euros, convert euros to our destination currency.
* The exchangeRates stores X to EUR, so we divide by the conversion rate to go EUR to X.
*/
NSNumber *conversionRateBaseCurrencyNumber = [exchangeRates objectForKey:[NSString stringWithFormat:@"\"%@ to EUR\"", self.baseCurrency]];
conversionFactor /= [conversionRateBaseCurrencyNumber floatValue];
}

/* Cache this conversion for next time */
[self.conversionDict setObject:[NSNumber numberWithFloat:conversionFactor] forKey:sourceCurrency];
}
return (sourceValue * conversionFactor);
}

+ (CurrencyManager *)sharedManager
{
static CurrencyManager *sharedManager = nil;
if (sharedManager == nil)
sharedManager = [CurrencyManager new];
return sharedManager;
}

- (void)dealloc
{
self.conversionDict = nil;

[numberFormatterWithFraction release];
[numberFormatterWithoutFraction release];

[exchangeRates release];
[baseCurrency release];
[currencySymbols release];

[super dealloc];
}

@end
Something went wrong with that request. Please try again.