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@ -1,12 +1,53 @@
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//
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// OWSAnalytics.m
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//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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#import "OWSAnalytics.h"
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#import "AppVersion.h"
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#import "TSStorageManager.h"
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#import <CocoaLumberjack/CocoaLumberjack.h>
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#import <Reachability/Reachability.h>
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#import "OWSAnalytics.h"
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NS_ASSUME_NONNULL_BEGIN
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#if TARGET_IPHONE_SIMULATOR
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#define NO_SIGNAL_ANALYTICS
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#else
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#ifdef DEBUG
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// TODO: Disable analytics for debug builds.
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//#define NO_SIGNAL_ANALYTICS
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#endif
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#endif
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NSString *const kOWSAnalytics_EventsCollection = @"kOWSAnalytics_EventsCollection";
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NSString *const kOWSAnalytics_Collection = @"kOWSAnalytics_Collection";
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NSString *const kOWSAnalytics_KeyLaunchCount = @"kOWSAnalytics_KeyLaunchCount";
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NSString *const kOWSAnalytics_KeyLaunchCompleteCount = @"kOWSAnalytics_KeyLaunchCompleteCount";
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// Percentage of analytics events to discard. 0 <= x <= 100.
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const int kOWSAnalytics_DiscardFrequency = 0;
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@interface OWSAnalytics ()
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@property (nonatomic, readonly) TSStorageManager *storageManager;
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@property (nonatomic, readonly) Reachability *reachability;
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@property (nonatomic, readonly) YapDatabaseConnection *dbConnection;
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@property (atomic) BOOL hasRequestInFlight;
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@property (atomic) NSNumber *launchCount;
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@property (atomic) NSNumber *launchCompleteCount;
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@end
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#pragma mark -
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@implementation OWSAnalytics
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@ -16,27 +57,223 @@
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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instance = [self new];
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// TODO: If we ever log these events to disk,
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// we may want to protect these file(s) like TSStorageManager.
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instance = [[self alloc] initDefault];
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});
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return instance;
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}
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+ (void)logEvent:(NSString *)description
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severity:(OWSAnalyticsSeverity)severity
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parameters:(NSDictionary *)parameters
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location:(const char *)location
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- (instancetype)initDefault
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{
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TSStorageManager *storageManager = [TSStorageManager sharedManager];
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return [self initWithStorageManager:storageManager];
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}
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- (instancetype)initWithStorageManager:(TSStorageManager *)storageManager
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{
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self = [super init];
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if (!self) {
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return self;
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}
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OWSAssert(storageManager);
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_storageManager = storageManager;
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// Use a newDatabaseConnection so as not to block other reads in the launch path.
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_dbConnection = storageManager.newDatabaseConnection;
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_reachability = [Reachability reachabilityForInternetConnection];
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[self observeNotifications];
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OWSSingletonAssert();
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return self;
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}
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- (void)observeNotifications
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{
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(reachabilityChanged)
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name:kReachabilityChangedNotification
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object:nil];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(applicationDidBecomeActive)
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name:UIApplicationDidBecomeActiveNotification
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object:nil];
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}
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- (void)dealloc
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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- (void)reachabilityChanged
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{
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OWSAssert([NSThread isMainThread]);
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[self tryToSyncEvents];
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}
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- (void)applicationDidBecomeActive
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{
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OWSAssert([NSThread isMainThread]);
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[self tryToSyncEvents];
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}
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- (void)tryToSyncEvents
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{
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// Don't try to sync if:
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//
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// * There's no network available.
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// * There's already a sync request in flight.
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if (!self.reachability.isReachable || self.hasRequestInFlight) {
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return;
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}
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dispatch_async(self.serialQueue, ^{
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__block NSString *firstEventKey = nil;
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__block NSDictionary *firstEventDictionary = nil;
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[self.dbConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
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// Take any event. We don't need to deliver them in any particular order.
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[transaction enumerateKeysInCollection:kOWSAnalytics_EventsCollection
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usingBlock:^(NSString *key, BOOL *_Nonnull stop) {
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firstEventKey = key;
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*stop = YES;
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}];
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if (!firstEventKey) {
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return;
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}
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firstEventDictionary = [transaction objectForKey:firstEventKey inCollection:kOWSAnalytics_EventsCollection];
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OWSAssert(firstEventDictionary);
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OWSAssert([firstEventDictionary isKindOfClass:[NSDictionary class]]);
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}];
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if (!firstEventDictionary) {
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return;
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}
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DDLogDebug(@"%@ trying to deliver event: %@", self.tag, firstEventKey);
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self.hasRequestInFlight = YES;
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// Until we integrate with an analytics platform, behave as though all event delivery succeeds.
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dispatch_async(dispatch_get_main_queue(), ^{
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self.hasRequestInFlight = NO;
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BOOL success = YES;
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if (success) {
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[self.dbConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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// Remove from queue.
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[transaction removeObjectForKey:firstEventKey inCollection:kOWSAnalytics_EventsCollection];
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}];
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}
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// Wait a second between network requests / retries.
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dispatch_after(
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dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
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[self tryToSyncEvents];
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});
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});
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});
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}
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- (dispatch_queue_t)serialQueue
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{
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static dispatch_queue_t queue = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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queue = dispatch_queue_create("org.whispersystems.analytics.serial", DISPATCH_QUEUE_SERIAL);
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});
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return queue;
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}
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- (NSDictionary<NSString *, id> *)eventSuperProperties
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{
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NSMutableDictionary<NSString *, id> *result = [NSMutableDictionary new];
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if (AppVersion.instance.firstAppVersion) {
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result[@"app_version_first"] = AppVersion.instance.firstAppVersion;
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}
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if (AppVersion.instance.lastAppVersion) {
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result[@"app_version_last"] = AppVersion.instance.lastAppVersion;
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}
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if (AppVersion.instance.currentAppVersion) {
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result[@"app_version_current"] = AppVersion.instance.currentAppVersion;
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}
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NSNumber *launchCount = self.launchCount;
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if (launchCount) {
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result[@"launch_count"] = @([self orderOfMagnitudeOf:launchCount.longValue]);
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}
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// TODO: Order of magnitude: thread count.
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// TODO: Order of magnitude: total message count.
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return result;
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}
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- (long)orderOfMagnitudeOf:(long)value
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{
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return [OWSAnalytics orderOfMagnitudeOf:value];
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}
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+ (long)orderOfMagnitudeOf:(long)value
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{
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if (value <= 0) {
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return 0;
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}
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return (long)round(pow(10, floor(log10(value))));
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}
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- (void)addEvent:(NSString *)eventName properties:(NSDictionary *)properties
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{
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OWSAssert(eventName.length > 0);
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uint32_t discardValue = arc4random_uniform(101);
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if (discardValue < kOWSAnalytics_DiscardFrequency) {
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DDLogVerbose(@"Discarding event: %@", eventName);
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return;
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}
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#ifndef NO_SIGNAL_ANALYTICS
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dispatch_async(self.serialQueue, ^{
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// Add super properties.
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NSMutableDictionary *eventProperties = (properties ? [properties mutableCopy] : [NSMutableDictionary new]);
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[eventProperties addEntriesFromDictionary:self.eventSuperProperties];
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[[self sharedInstance] logEvent:description severity:severity parameters:parameters location:location];
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NSDictionary *eventDictionary = [eventProperties copy];
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OWSAssert(eventDictionary);
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NSString *eventKey = [NSUUID UUID].UUIDString;
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DDLogDebug(@"%@ enqueuing event: %@", self.tag, eventKey);
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[self.dbConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
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const int kMaxQueuedEvents = 5000;
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if ([transaction numberOfKeysInCollection:kOWSAnalytics_EventsCollection] > kMaxQueuedEvents) {
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DDLogError(@"%@ Event queue overflow.", self.tag);
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return;
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}
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- (void)logEvent:(NSString *)description
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[transaction setObject:eventDictionary forKey:eventKey inCollection:kOWSAnalytics_EventsCollection];
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}];
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[self tryToSyncEvents];
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});
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#endif
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}
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+ (void)logEvent:(NSString *)eventName
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severity:(OWSAnalyticsSeverity)severity
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parameters:(NSDictionary *)parameters
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parameters:(nullable NSDictionary *)parameters
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location:(const char *)location
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line:(int)line
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{
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[[self sharedInstance] logEvent:eventName severity:severity parameters:parameters location:location line:line];
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}
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- (void)logEvent:(NSString *)eventName
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severity:(OWSAnalyticsSeverity)severity
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parameters:(nullable NSDictionary *)parameters
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location:(const char *)location
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line:(int)line
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{
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DDLogFlag logFlag;
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BOOL async = YES;
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switch (severity) {
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@ -64,13 +301,81 @@
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}
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// Log the event.
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NSString *logString = [NSString stringWithFormat:@"%s:%d %@", location, line, eventName];
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if (!parameters) {
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LOG_MAYBE(async, LOG_LEVEL_DEF, logFlag, 0, nil, location, @"%@", description);
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LOG_MAYBE(async, LOG_LEVEL_DEF, logFlag, 0, nil, location, @"%@", logString);
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} else {
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LOG_MAYBE(async, LOG_LEVEL_DEF, logFlag, 0, nil, location, @"%@ %@", description, parameters);
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LOG_MAYBE(async, LOG_LEVEL_DEF, logFlag, 0, nil, location, @"%@ %@", logString, parameters);
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}
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if (!async) {
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[DDLog flushLog];
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}
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NSMutableDictionary *eventProperties = (parameters ? [parameters mutableCopy] : [NSMutableDictionary new]);
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eventProperties[@"event_location"] = [NSString stringWithFormat:@"%s:%d", location, line];
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[self addEvent:eventName properties:eventProperties];
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}
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// Do nothing. We don't yet serialize or transmit analytics events.
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#pragma mark - Logging
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+ (void)appLaunchDidBegin
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{
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[self.sharedInstance appLaunchDidBegin];
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}
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- (void)appLaunchDidBegin
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{
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OWSProdInfo(@"app_launch");
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[self.dbConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
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NSNumber *oldLaunchCount =
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[transaction objectForKey:kOWSAnalytics_KeyLaunchCount inCollection:kOWSAnalytics_Collection];
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NSNumber *newLaunchCount = @(oldLaunchCount.longValue + 1);
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self.launchCount = newLaunchCount;
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NSNumber *oldLaunchCompleteCount =
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[transaction objectForKey:kOWSAnalytics_KeyLaunchCompleteCount inCollection:kOWSAnalytics_Collection];
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self.launchCompleteCount = @(oldLaunchCompleteCount.longValue);
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}];
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[TSStorageManager.sharedManager.newDatabaseConnection
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asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
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[transaction setObject:self.launchCount
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forKey:kOWSAnalytics_KeyLaunchCount
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inCollection:kOWSAnalytics_Collection];
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}];
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}
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+ (void)appLaunchDidComplete
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{
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[self.sharedInstance appLaunchDidComplete];
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}
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- (void)appLaunchDidComplete
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{
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OWSProdInfo(@"app_launch_complete");
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self.launchCompleteCount = @(self.launchCompleteCount.longValue + 1);
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[TSStorageManager.sharedManager.newDatabaseConnection
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asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
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[transaction setObject:self.launchCompleteCount
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forKey:kOWSAnalytics_KeyLaunchCompleteCount
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inCollection:kOWSAnalytics_Collection];
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}];
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}
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#pragma mark - Logging
|
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+ (NSString *)tag
|
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{
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|
return [NSString stringWithFormat:@"[%@]", self.class];
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}
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- (NSString *)tag
|
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|
{
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|
|
return self.class.tag;
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}
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@end
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NS_ASSUME_NONNULL_END
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Matthew Chen
8 years ago