feat: Allow uploadInterval to be set manually (#175)

Example/mParticleExample/ViewController.m

@@ -57,11 +57,11 @@ - (NSArray *)cellTitles {
 
     _cellTitles = @[@"Log Simple Event", @"Log Event", @"Log Screen", @"Log Commerce Event", @"Log Timed Event",
                     @"Log Error", @"Log Exception", @"Set User Attribute", @"Increment User Attribute",
-                    @"Set Session Attribute", @"Increment Session Attribute", @"Register Remote", @"Log Base Event", @"Log Media Events", @"Toggle CCPA Consent", @"Toggle GDPR Consent", @"Request & Set IDFA", @"Logout", @"Login", @"Set IDFA"];
+                    @"Set Session Attribute", @"Increment Session Attribute", @"Register Remote", @"Log Base Event", @"Log Media Events", @"Toggle CCPA Consent", @"Toggle GDPR Consent", @"Request & Set IDFA", @"Logout", @"Login", @"Set IDFA", @"Decrease Upload Timer", @"Increase Upload Timer"];
 
     selectorNames = @[@"logSimpleEvent", @"logEvent", @"logScreen", @"logCommerceEvent", @"logTimedEvent",
                       @"logError", @"logException", @"setUserAttribute", @"incrementUserAttribute",
-                      @"setSessionAttribute", @"incrementSessionAttribute", @"registerRemote", @"logBaseEvent", @"logCustomMediaEvents", @"toggleCCPAConsent", @"toggleGDPRConsent", @"requestIDFA", @"logout", @"login", @"modify"];
+                      @"setSessionAttribute", @"incrementSessionAttribute", @"registerRemote", @"logBaseEvent", @"logCustomMediaEvents", @"toggleCCPAConsent", @"toggleGDPRConsent", @"requestIDFA", @"logout", @"login", @"modify", @"decreaseUploadInterval", @"increaseUploadInterval"];
 
     return _cellTitles;
 }
@@ -405,5 +405,13 @@ - (void)modify {
     [self logIDFA:@"C56A4180-65AA-42EC-A945-5FD21DEC0538"];
 }
 
+-(void)decreaseUploadInterval {
+    [MParticle sharedInstance].uploadInterval = 1.0;
+}
+
+-(void)increaseUploadInterval {
+    [MParticle sharedInstance].uploadInterval = 1200.0;
+}
+
 
 @end

UnitTests/MParticleTests.m

@@ -1022,6 +1022,26 @@ - (void)testUserAgentCustom {
     [mockWebView stopMocking];
 }
 
+- (void)testUploadInterval {
+    MParticle *instance = [MParticle sharedInstance];
+    instance.backendController = [[MPBackendController alloc] init];
+
+    XCTAssertEqual(instance.uploadInterval, DEFAULT_DEBUG_UPLOAD_INTERVAL);
+}
+
+- (void)testSetUploadInterval {
+    MParticle *instance = [MParticle sharedInstance];
+    instance.backendController = [[MPBackendController alloc] init];
+    NSTimeInterval testInterval = 800.0;
+    instance.uploadInterval = testInterval;
+
+#if TARGET_OS_TV == 1
+    XCTAssertEqual(instance.uploadInterval, DEFAULT_UPLOAD_INTERVAL);
+#else
+    XCTAssertEqual(instance.uploadInterval, testInterval);
+#endif
+}
+
 #pragma mark Error, Exception, and Crash Handling Tests
 
 - (void)testLogCrash {

mParticle-Apple-SDK/Include/mParticle.h

@@ -556,9 +556,10 @@ Defaults to false. Prevents the eventsHost above from overwriting the alias endp
  Gets/Sets the interval to upload data to mParticle servers.
  
  Batches of data are sent periodically to the mParticle servers at the rate defined by the uploadInterval. Batches are also uploaded
- when the application is sent to the background or before they are terminated.
+ when the application is sent to the background or before they are terminated. When set, an upload is performed immediately before the sdk adheres to the new upload interval.
+ The minimum uploadInterval is 1 second (1.0). The default uploadInterval is 10 minutes (600.0) on iOS and 6 seconds (6.0) on tvOS.
  */
-@property (nonatomic, readonly) NSTimeInterval uploadInterval;
+@property (nonatomic, readwrite) NSTimeInterval uploadInterval;
 
 /**
  mParticle Apple SDK version

mParticle-Apple-SDK/mParticle.m

@@ -438,6 +438,13 @@ - (NSString *)uniqueIdentifier {
     return [MParticle sharedInstance].stateMachine.consumerInfo.uniqueIdentifier;
 }
 
+- (void)setUploadInterval:(NSTimeInterval)uploadInterval {
+    if (uploadInterval >= 1.0 && uploadInterval != self.backendController.uploadInterval) {
+        [self upload];
+        self.backendController.uploadInterval = uploadInterval;
+    }
+}
+
 - (NSTimeInterval)uploadInterval {
     return self.backendController.uploadInterval;
 }