Appirater.m

/*
 This file is part of Appirater.
 
 Copyright (c) 2012, Arash Payan
 All rights reserved.
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
 restriction, including without limitation the rights to use,
 copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following
 conditions:
 
 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.
 */
/*
 * Appirater.m
 * appirater
 *
 * Created by Arash Payan on 9/5/09.
 * http://arashpayan.com
 * Copyright 2012 Arash Payan. All rights reserved.
 */

#import "Appirater.h"
#import <SystemConfiguration/SCNetworkReachability.h>
#include <netinet/in.h>

#if ! __has_feature(objc_arc)
#warning This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif

NSString *const kAppiraterFirstUseDate				= @"kAppiraterFirstUseDate";
NSString *const kAppiraterUseCount					= @"kAppiraterUseCount";
NSString *const kAppiraterSignificantEventCount		= @"kAppiraterSignificantEventCount";
NSString *const kAppiraterCurrentVersion			= @"kAppiraterCurrentVersion";
NSString *const kAppiraterRatedCurrentVersion		= @"kAppiraterRatedCurrentVersion";
NSString *const kAppiraterDeclinedToRate			= @"kAppiraterDeclinedToRate";
NSString *const kAppiraterReminderRequestDate		= @"kAppiraterReminderRequestDate";

NSString *templateReviewURL = @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=APP_ID";

static NSString *_appId;
static double _daysUntilPrompt = 30;
static NSInteger _usesUntilPrompt = 20;
static NSInteger _significantEventsUntilPrompt = -1;
static double _timeBeforeReminding = 1;
static BOOL _debug = NO;
static id<AppiraterDelegate> _delegate;
static BOOL _usesAnimation = TRUE;
static BOOL _openInAppStore = NO;
static UIStatusBarStyle _statusBarStyle;
static BOOL _modalOpen = false;

@interface Appirater ()
- (BOOL)connectedToNetwork;
+ (Appirater*)sharedInstance;
- (void)showRatingAlert;
- (BOOL)ratingConditionsHaveBeenMet;
- (void)incrementUseCount;
- (void)hideRatingAlert;
@end

@implementation Appirater 

@synthesize ratingAlert;

+ (void) setAppId:(NSString *)appId {
    _appId = appId;
}

+ (void) setDaysUntilPrompt:(double)value {
    _daysUntilPrompt = value;
}

+ (void) setUsesUntilPrompt:(NSInteger)value {
    _usesUntilPrompt = value;
}

+ (void) setSignificantEventsUntilPrompt:(NSInteger)value {
    _significantEventsUntilPrompt = value;
}

+ (void) setTimeBeforeReminding:(double)value {
    _timeBeforeReminding = value;
}

+ (void) setDebug:(BOOL)debug {
    _debug = debug;
}
+ (void)setDelegate:(id<AppiraterDelegate>)delegate{
	_delegate = delegate;
}
+ (void)setUsesAnimation:(BOOL)animation {
	_usesAnimation = animation;
}
+ (void)setOpenInAppStore:(BOOL)openInAppStore {
    _openInAppStore = openInAppStore;
}
+ (void)setStatusBarStyle:(UIStatusBarStyle)style {
	_statusBarStyle = style;
}
+ (void)setModalOpen:(BOOL)open {
	_modalOpen = open;
}

- (BOOL)connectedToNetwork {
    // Create zero addy
    struct sockaddr_in zeroAddress;
    bzero(&zeroAddress, sizeof(zeroAddress));
    zeroAddress.sin_len = sizeof(zeroAddress);
    zeroAddress.sin_family = AF_INET;
	
    // Recover reachability flags
    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);
    SCNetworkReachabilityFlags flags;
	
    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
    CFRelease(defaultRouteReachability);
	
    if (!didRetrieveFlags)
    {
        NSLog(@"Error. Could not recover network reachability flags");
        return NO;
    }
	
    BOOL isReachable = flags & kSCNetworkFlagsReachable;
    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;
	BOOL nonWiFi = flags & kSCNetworkReachabilityFlagsTransientConnection;
	
	NSURL *testURL = [NSURL URLWithString:@"http://www.apple.com/"];
	NSURLRequest *testRequest = [NSURLRequest requestWithURL:testURL  cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:20.0];
	NSURLConnection *testConnection = [[NSURLConnection alloc] initWithRequest:testRequest delegate:self];
	
    return ((isReachable && !needsConnection) || nonWiFi) ? (testConnection ? YES : NO) : NO;
}

+ (Appirater*)sharedInstance {
	static Appirater *appirater = nil;
	if (appirater == nil)
	{
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            appirater = [[Appirater alloc] init];
			appirater.delegate = _delegate;
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillResignActive) name:
                UIApplicationWillResignActiveNotification object:nil];
        });
	}
	
	return appirater;
}

- (void)showRatingAlert {
    NSString *title, *message, *cancelButtonTitle, *rateButtonTitle, *remindButtonTitle;
    
    if ([self.delegate respondsToSelector:@selector(titleForAppiraterRatingAlert:)]) {
        title = [self.delegate titleForAppiraterRatingAlert:self];
    } else {
        title = APPIRATER_MESSAGE_TITLE;
    }
    
    if ([self.delegate respondsToSelector:@selector(messageForAppiraterRatingAlert:)]) {
        message = [self.delegate messageForAppiraterRatingAlert:self];
    } else {
        message = APPIRATER_MESSAGE;
    }
    
    if ([self.delegate respondsToSelector:@selector(titleForCancelButtonInAppiraterRatingAlert:)]) {
        cancelButtonTitle = [self.delegate titleForCancelButtonInAppiraterRatingAlert:self];
    } else {
        cancelButtonTitle = APPIRATER_CANCEL_BUTTON;
    }
    
    if ([self.delegate respondsToSelector:@selector(titleForRateButtonInAppiraterRatingAlert:)]) {
        rateButtonTitle = [self.delegate titleForRateButtonInAppiraterRatingAlert:self];
    } else {
        rateButtonTitle = APPIRATER_RATE_BUTTON;
    }
    
    if ([self.delegate respondsToSelector:@selector(titleForRemindButtonInAppiraterRatingAlert:)]) {
        remindButtonTitle = [self.delegate titleForRemindButtonInAppiraterRatingAlert:self];
    } else {
        remindButtonTitle = APPIRATER_RATE_LATER;
    }
    
	UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
                                                        message:message
                                                       delegate:self
                                              cancelButtonTitle:cancelButtonTitle
                                              otherButtonTitles:rateButtonTitle, remindButtonTitle, nil];
	self.ratingAlert = alertView;
	[alertView show];
	
	if(self.delegate && [self.delegate respondsToSelector:@selector(appiraterDidDisplayAlert:)]){
		[self.delegate appiraterDidDisplayAlert:self];
	}
}

- (BOOL)ratingConditionsHaveBeenMet {
	if (_debug)
		return YES;
	
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	
	NSDate *dateOfFirstLaunch = [NSDate dateWithTimeIntervalSince1970:[userDefaults doubleForKey:kAppiraterFirstUseDate]];
	NSTimeInterval timeSinceFirstLaunch = [[NSDate date] timeIntervalSinceDate:dateOfFirstLaunch];
	NSTimeInterval timeUntilRate = 60 * 60 * 24 * _daysUntilPrompt;
	if (timeSinceFirstLaunch < timeUntilRate)
		return NO;
	
	// check if the app has been used enough
	int useCount = [userDefaults integerForKey:kAppiraterUseCount];
	if (useCount <= _usesUntilPrompt)
		return NO;
	
	// check if the user has done enough significant events
	int sigEventCount = [userDefaults integerForKey:kAppiraterSignificantEventCount];
	if (sigEventCount <= _significantEventsUntilPrompt)
		return NO;
	
	// has the user previously declined to rate this version of the app?
	if ([userDefaults boolForKey:kAppiraterDeclinedToRate])
		return NO;
	
	// has the user already rated the app?
	if ([self userHasRatedCurrentVersion])
		return NO;
	
	// if the user wanted to be reminded later, has enough time passed?
	NSDate *reminderRequestDate = [NSDate dateWithTimeIntervalSince1970:[userDefaults doubleForKey:kAppiraterReminderRequestDate]];
	NSTimeInterval timeSinceReminderRequest = [[NSDate date] timeIntervalSinceDate:reminderRequestDate];
	NSTimeInterval timeUntilReminder = 60 * 60 * 24 * _timeBeforeReminding;
	if (timeSinceReminderRequest < timeUntilReminder)
		return NO;
	
	return YES;
}

- (void)incrementUseCount {
	// get the app's version
	NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString*)kCFBundleVersionKey];
	
	// get the version number that we've been tracking
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	NSString *trackingVersion = [userDefaults stringForKey:kAppiraterCurrentVersion];
	if (trackingVersion == nil)
	{
		trackingVersion = version;
		[userDefaults setObject:version forKey:kAppiraterCurrentVersion];
	}
	
	if (_debug)
		NSLog(@"APPIRATER Tracking version: %@", trackingVersion);
	
	if ([trackingVersion isEqualToString:version])
	{
		// check if the first use date has been set. if not, set it.
		NSTimeInterval timeInterval = [userDefaults doubleForKey:kAppiraterFirstUseDate];
		if (timeInterval == 0)
		{
			timeInterval = [[NSDate date] timeIntervalSince1970];
			[userDefaults setDouble:timeInterval forKey:kAppiraterFirstUseDate];
		}
		
		// increment the use count
		int useCount = [userDefaults integerForKey:kAppiraterUseCount];
		useCount++;
		[userDefaults setInteger:useCount forKey:kAppiraterUseCount];
		if (_debug)
			NSLog(@"APPIRATER Use count: %d", useCount);
	}
	else
	{
		// it's a new version of the app, so restart tracking
		[userDefaults setObject:version forKey:kAppiraterCurrentVersion];
		[userDefaults setDouble:[[NSDate date] timeIntervalSince1970] forKey:kAppiraterFirstUseDate];
		[userDefaults setInteger:1 forKey:kAppiraterUseCount];
		[userDefaults setInteger:0 forKey:kAppiraterSignificantEventCount];
		[userDefaults setBool:NO forKey:kAppiraterRatedCurrentVersion];
		[userDefaults setBool:NO forKey:kAppiraterDeclinedToRate];
		[userDefaults setDouble:0 forKey:kAppiraterReminderRequestDate];
	}
	
	[userDefaults synchronize];
}

- (void)incrementSignificantEventCount {
	// get the app's version
	NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString*)kCFBundleVersionKey];
	
	// get the version number that we've been tracking
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	NSString *trackingVersion = [userDefaults stringForKey:kAppiraterCurrentVersion];
	if (trackingVersion == nil)
	{
		trackingVersion = version;
		[userDefaults setObject:version forKey:kAppiraterCurrentVersion];
	}
	
	if (_debug)
		NSLog(@"APPIRATER Tracking version: %@", trackingVersion);
	
	if ([trackingVersion isEqualToString:version])
	{
		// check if the first use date has been set. if not, set it.
		NSTimeInterval timeInterval = [userDefaults doubleForKey:kAppiraterFirstUseDate];
		if (timeInterval == 0)
		{
			timeInterval = [[NSDate date] timeIntervalSince1970];
			[userDefaults setDouble:timeInterval forKey:kAppiraterFirstUseDate];
		}
		
		// increment the significant event count
		int sigEventCount = [userDefaults integerForKey:kAppiraterSignificantEventCount];
		sigEventCount++;
		[userDefaults setInteger:sigEventCount forKey:kAppiraterSignificantEventCount];
		if (_debug)
			NSLog(@"APPIRATER Significant event count: %d", sigEventCount);
	}
	else
	{
		// it's a new version of the app, so restart tracking
		[userDefaults setObject:version forKey:kAppiraterCurrentVersion];
		[userDefaults setDouble:0 forKey:kAppiraterFirstUseDate];
		[userDefaults setInteger:0 forKey:kAppiraterUseCount];
		[userDefaults setInteger:1 forKey:kAppiraterSignificantEventCount];
		[userDefaults setBool:NO forKey:kAppiraterRatedCurrentVersion];
		[userDefaults setBool:NO forKey:kAppiraterDeclinedToRate];
		[userDefaults setDouble:0 forKey:kAppiraterReminderRequestDate];
	}
	
	[userDefaults synchronize];
}

- (void)incrementAndRate:(BOOL)canPromptForRating {
	[self incrementUseCount];
	
	if (canPromptForRating &&
		[self ratingConditionsHaveBeenMet] &&
		[self connectedToNetwork])
	{
        dispatch_async(dispatch_get_main_queue(),
                       ^{
                           [self showRatingAlert];
                       });
	}
}

- (void)incrementSignificantEventAndRate:(BOOL)canPromptForRating {
	[self incrementSignificantEventCount];
	
	if (canPromptForRating &&
		[self ratingConditionsHaveBeenMet] &&
		[self connectedToNetwork])
	{
        dispatch_async(dispatch_get_main_queue(),
                       ^{
                           [self showRatingAlert];
                       });
	}
}

- (BOOL)userHasDeclinedToRate {
    return [[NSUserDefaults standardUserDefaults] boolForKey:kAppiraterDeclinedToRate];
}

- (BOOL)userHasRatedCurrentVersion {
    return [[NSUserDefaults standardUserDefaults] boolForKey:kAppiraterRatedCurrentVersion];
}

+ (void)appLaunched {
	[Appirater appLaunched:YES];
}

+ (void)appLaunched:(BOOL)canPromptForRating {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
                   ^{
                       [[Appirater sharedInstance] incrementAndRate:canPromptForRating];
                   });
}

- (void)hideRatingAlert {
	if (self.ratingAlert.visible) {
		if (_debug)
			NSLog(@"APPIRATER Hiding Alert");
		[self.ratingAlert dismissWithClickedButtonIndex:-1 animated:NO];
	}	
}

+ (void)appWillResignActive {
	if (_debug)
		NSLog(@"APPIRATER appWillResignActive");
	[[Appirater sharedInstance] hideRatingAlert];
}

+ (void)appEnteredForeground:(BOOL)canPromptForRating {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
                   ^{
                       [[Appirater sharedInstance] incrementAndRate:canPromptForRating];
                   });
}

+ (void)userDidSignificantEvent:(BOOL)canPromptForRating {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0),
                   ^{
                       [[Appirater sharedInstance] incrementSignificantEventAndRate:canPromptForRating];
                   });
}

+ (void)showPrompt {
    if ([[Appirater sharedInstance] connectedToNetwork]
        && ![[Appirater sharedInstance] userHasDeclinedToRate]
        && ![[Appirater sharedInstance] userHasRatedCurrentVersion]) {
        [[Appirater sharedInstance] showRatingAlert];
    }
}

+ (id)getRootViewController {
    UIWindow *window = [[UIApplication sharedApplication] keyWindow];
    if (window.windowLevel != UIWindowLevelNormal) {
        NSArray *windows = [[UIApplication sharedApplication] windows];
        for(window in windows) {
            if (window.windowLevel == UIWindowLevelNormal) {
                break;
            }
        }
    }
    
    for (UIView *subView in [window subviews])
    {
        UIResponder *responder = [subView nextResponder];
        if([responder isKindOfClass:[UIViewController class]]) {
            return [self topMostViewController: (UIViewController *) responder];
        }
    }
    
    return nil;
}

+ (UIViewController *) topMostViewController: (UIViewController *) controller {
	BOOL isPresenting = NO;
	do {
		// this path is called only on iOS 6+, so -presentedViewController is fine here.
		UIViewController *presented = [controller presentedViewController];
		isPresenting = presented != nil;
		if(presented != nil) {
			controller = presented;
		}
		
	} while (isPresenting);
	
	return controller;
}

+ (void)rateApp {
	
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	[userDefaults setBool:YES forKey:kAppiraterRatedCurrentVersion];
	[userDefaults synchronize];

	//Use the in-app StoreKit view if available (iOS 6) and imported. This works in the simulator.
	if (!_openInAppStore && NSStringFromClass([SKStoreProductViewController class]) != nil) {
		
		SKStoreProductViewController *storeViewController = [[SKStoreProductViewController alloc] init];
		NSNumber *appId = [NSNumber numberWithInteger:_appId.integerValue];
		[storeViewController loadProductWithParameters:@{SKStoreProductParameterITunesItemIdentifier:appId} completionBlock:nil];
		storeViewController.delegate = self.sharedInstance;
		if ([self.sharedInstance.delegate respondsToSelector:@selector(appiraterWillPresentModalView:animated:)]) {
			[self.sharedInstance.delegate appiraterWillPresentModalView:self.sharedInstance animated:_usesAnimation];
		}
		[[self getRootViewController] presentViewController:storeViewController animated:_usesAnimation completion:^{
			[self setModalOpen:YES];
			//Temporarily use a black status bar to match the StoreKit view.
			[self setStatusBarStyle:[UIApplication sharedApplication].statusBarStyle];
			[[UIApplication sharedApplication]setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:_usesAnimation];
		}];
	
	//Use the standard openUrl method if StoreKit is unavailable.
	} else {
		
		#if TARGET_IPHONE_SIMULATOR
		NSLog(@"APPIRATER NOTE: iTunes App Store is not supported on the iOS simulator. Unable to open App Store page.");
		#else
		NSString *reviewURL = [templateReviewURL stringByReplacingOccurrencesOfString:@"APP_ID" withString:[NSString stringWithFormat:@"%@", _appId]];
		[[UIApplication sharedApplication] openURL:[NSURL URLWithString:reviewURL]];
		#endif
	}
}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	
	switch (buttonIndex) {
		case 0:
		{
			// they don't want to rate it
			[userDefaults setBool:YES forKey:kAppiraterDeclinedToRate];
			[userDefaults synchronize];
			if(self.delegate && [self.delegate respondsToSelector:@selector(appiraterDidDeclineToRate:)]){
				[self.delegate appiraterDidDeclineToRate:self];
			}
			break;
		}
		case 1:
		{
			// they want to rate it
			[Appirater rateApp];
			if(self.delegate && [self.delegate respondsToSelector:@selector(appiraterDidOptToRate:)]){
				[self.delegate appiraterDidOptToRate:self];
			}
			break;
		}
		case 2:
			// remind them later
			[userDefaults setDouble:[[NSDate date] timeIntervalSince1970] forKey:kAppiraterReminderRequestDate];
			[userDefaults synchronize];
			if(self.delegate && [self.delegate respondsToSelector:@selector(appiraterDidOptToRemindLater:)]){
				[self.delegate appiraterDidOptToRemindLater:self];
			}
			break;
		default:
			break;
	}
}

//Delegate call from the StoreKit view.
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController {
	[Appirater closeModal];
}

//Close the in-app rating (StoreKit) view and restore the previous status bar style.
+ (void)closeModal {
	if (_modalOpen) {
		[[UIApplication sharedApplication]setStatusBarStyle:_statusBarStyle animated:_usesAnimation];
		BOOL usedAnimation = _usesAnimation;
		[self setModalOpen:NO];
		
		// get the top most controller (= the StoreKit Controller) and dismiss it
		UIViewController *presentingController = [UIApplication sharedApplication].keyWindow.rootViewController;
		presentingController = [self topMostViewController: presentingController];
		[presentingController dismissViewControllerAnimated:_usesAnimation completion:^{
			if ([self.sharedInstance.delegate respondsToSelector:@selector(appiraterDidDismissModalView:animated:)]) {
				[self.sharedInstance.delegate appiraterDidDismissModalView:(Appirater *)self animated:usedAnimation];
			}
		}];
		[self.class setStatusBarStyle:(UIStatusBarStyle)nil];
	}
}

@end