Distinguish 'app will/did become ready' events.

Signal/src/AppDelegate.m

@@ -1130,17 +1130,9 @@ static NSTimeInterval launchStartedAt;
 
     [AppVersion.sharedInstance mainAppLaunchDidComplete];
 
-    [Environment.shared.contactsManager setup];
-    [Environment.shared.contactsManager startObserving];
-
-    // If there were any messages in our local queue which we hadn't yet processed.
-    [SSKEnvironment.shared.messageReceiver handleAnyUnprocessedEnvelopesAsync];
-    [SSKEnvironment.shared.batchMessageProcessor handleAnyUnprocessedEnvelopesAsync];
     [Environment.shared.audioSession setup];
 
     [SSKEnvironment.shared.reachabilityManager setup];
-    [SSKEnvironment.shared.messageSenderJobQueue setup];
-    [AppEnvironment.shared.sessionResetJobQueue setup];
 
     if (!Environment.shared.preferences.hasGeneratedThumbnails) {
         [self.primaryStorage.newDatabaseConnection

Signal/src/Jobs/SessionResetJob.swift

@@ -23,6 +23,15 @@ public class SessionResetJobQueue: NSObject, JobQueue {
     public let requiresInternet: Bool = true
     public var runningOperations: [SessionResetOperation] = []
 
+    @objc
+    public override init() {
+        super.init()
+
+        AppReadiness.runNowOrWhenAppWillBecomeReady {
+            self.setup()
+        }
+    }
+
     @objc
     public func setup() {
         defaultSetup()

SignalMessaging/contacts/OWSContactsManager.h

@@ -25,8 +25,6 @@ extern NSString *const OWSContactsManagerSignalAccountsDidChangeNotification;
 
 - (id)initWithPrimaryStorage:(OWSPrimaryStorage *)primaryStorage;
 
-- (void)startObserving;
-
 #pragma mark - Accessors
 
 @property (nonnull, readonly) ImageCache *avatarCache;
@@ -44,8 +42,6 @@ extern NSString *const OWSContactsManagerSignalAccountsDidChangeNotification;
 - (SignalAccount *)fetchOrBuildSignalAccountForRecipientId:(NSString *)recipientId;
 - (BOOL)hasSignalAccountForRecipientId:(NSString *)recipientId;
 
-- (void)setup;
-
 #pragma mark - System Contact Fetching
 
 // Must call `requestSystemContactsOnce` before accessing this method

SignalMessaging/contacts/OWSContactsManager.m

@@ -82,6 +82,13 @@ NSString *const OWSContactsManagerKeyNextFullIntersectionDate = @"OWSContactsMan
 
     OWSSingletonAssert();
 
+    [AppReadiness runNowOrWhenAppWillBecomeReady:^{
+        [self setup];
+    }];
+    [AppReadiness runNowOrWhenAppDidBecomeReady:^{
+        [self startObserving];
+    }];
+
     return self;
 }
 

SignalServiceKit/src/Messages/OWSBatchMessageProcessor.h

@@ -24,8 +24,6 @@ NS_ASSUME_NONNULL_BEGIN
               plaintextData:(NSData *_Nullable)plaintextData
                 transaction:(YapDatabaseReadWriteTransaction *)transaction;
 
-- (void)handleAnyUnprocessedEnvelopesAsync;
-
 @end
 
 NS_ASSUME_NONNULL_END

SignalServiceKit/src/Messages/OWSBatchMessageProcessor.m

@@ -458,6 +458,12 @@ NSString *const OWSMessageContentJobFinderExtensionGroup = @"OWSMessageContentJo
 
     _processingQueue = processingQueue;
 
+    [AppReadiness runNowOrWhenAppDidBecomeReady:^{
+        if (CurrentAppContext().isMainApp) {
+            [self.processingQueue drainQueue];
+        }
+    }];
+
     return self;
 }
 
@@ -475,11 +481,6 @@ NSString *const OWSMessageContentJobFinderExtensionGroup = @"OWSMessageContentJo
 
 #pragma mark - instance methods
 
-- (void)handleAnyUnprocessedEnvelopesAsync
-{
-    [self.processingQueue drainQueue];
-}
-
 - (void)enqueueEnvelopeData:(NSData *)envelopeData
               plaintextData:(NSData *_Nullable)plaintextData
                 transaction:(YapDatabaseReadWriteTransaction *)transaction

SignalServiceKit/src/Messages/OWSMessageReceiver.h

@@ -20,7 +20,6 @@ NS_ASSUME_NONNULL_BEGIN
 + (void)asyncRegisterDatabaseExtension:(OWSStorage *)storage;
 
 - (void)handleReceivedEnvelopeData:(NSData *)envelopeData;
-- (void)handleAnyUnprocessedEnvelopesAsync;
 
 @end
 

SignalServiceKit/src/Messages/OWSMessageReceiver.m

@@ -414,6 +414,12 @@ NSString *const OWSMessageDecryptJobFinderExtensionGroup = @"OWSMessageProcessin
 
     _processingQueue = processingQueue;
 
+    [AppReadiness runNowOrWhenAppDidBecomeReady:^{
+        if (CurrentAppContext().isMainApp) {
+            [self.processingQueue drainQueue];
+        }
+    }];
+
     return self;
 }
 
@@ -431,11 +437,6 @@ NSString *const OWSMessageDecryptJobFinderExtensionGroup = @"OWSMessageProcessin
 
 #pragma mark - instance methods
 
-- (void)handleAnyUnprocessedEnvelopesAsync
-{
-    [self.processingQueue drainQueue];
-}
-
 - (void)handleReceivedEnvelopeData:(NSData *)envelopeData
 {
     if (envelopeData.length < 1) {

SignalServiceKit/src/Network/MessageSenderJobQueue.swift

@@ -25,6 +25,15 @@ import Foundation
 @objc(SSKMessageSenderJobQueue)
 public class MessageSenderJobQueue: NSObject, JobQueue {
 
+    @objc
+    public override init() {
+        super.init()
+
+        AppReadiness.runNowOrWhenAppWillBecomeReady {
+            self.setup()
+        }
+    }
+
     // MARK: 
 
     @objc(addMessage:transaction:)

SignalServiceKit/src/Util/AppReadiness.h

@@ -21,13 +21,14 @@ typedef void (^AppReadyBlock)(void);
 //
 // This method should only be called on the main thread.
 // The block will always be called on the main thread.
-+ (void)runNowOrWhenAppWillBecomeReady:(AppReadyBlock)block NS_SWIFT_NAME(runNowOrWhenAppWillBecomeReady(_:));
-
-// If the app is ready, the block is called immediately;
-// otherwise it is called when the app becomes ready.
 //
-// This method should only be called on the main thread.
-// The block will always be called on the main thread.
+// * The "will become ready" blocks are called before the "did become ready" blocks.
+// * The "will become ready" blocks should be used for internal setup of components
+//   so that they are ready to interact with other components of the system.
+// * The "did become ready" blocks should be used for any work that should be done
+//   on app launch, especially work that uses other components.
+// * We should usually use "did become ready" blocks since they are safer.
++ (void)runNowOrWhenAppWillBecomeReady:(AppReadyBlock)block NS_SWIFT_NAME(runNowOrWhenAppWillBecomeReady(_:));
 + (void)runNowOrWhenAppDidBecomeReady:(AppReadyBlock)block NS_SWIFT_NAME(runNowOrWhenAppDidBecomeReady(_:));
 
 @end

SignalServiceKit/src/Util/AppReadiness.m

@@ -64,8 +64,7 @@ NS_ASSUME_NONNULL_BEGIN
     OWSAssertDebug(block);
 
     if (CurrentAppContext().isRunningTests) {
-        // We don't need to an any "on app ready" work
-        // in the tests.
+        // We don't need to do any "on app ready" work in the tests.
         return;
     }
 
@@ -90,8 +89,7 @@ NS_ASSUME_NONNULL_BEGIN
     OWSAssertDebug(block);
 
     if (CurrentAppContext().isRunningTests) {
-        // We don't need to an any "on app ready" work
-        // in the tests.
+        // We don't need to do any "on app ready" work in the tests.
         return;
     }
 

SignalServiceKit/src/Util/JobQueue.swift

@@ -88,7 +88,7 @@ public protocol JobQueue: DurableOperationDelegate {
 
 public extension JobQueue {
 
-    // MARK: Depenencies
+    // MARK: Dependencies
 
     var dbConnection: YapDatabaseConnection {
         return SSKEnvironment.shared.primaryStorage.dbReadWriteConnection
@@ -109,7 +109,11 @@ public extension JobQueue {
         jobRecord.save(with: transaction)
 
         transaction.addCompletionQueue(.global()) {
-            self.workStep()
+            AppReadiness.runNowOrWhenAppDidBecomeReady {
+                DispatchQueue.global().async {
+                    self.workStep()
+                }
+            }
         }
     }
 
@@ -283,7 +287,7 @@ public class JobRecordFinder: NSObject, Finder {
 
     func allRecords(label: String, status: SSKJobRecordStatus, transaction: YapDatabaseReadTransaction) -> [SSKJobRecord] {
         var result: [SSKJobRecord] = []
-        self.enumerateJobRecords(label: label, status: status, transaction: transaction) { jobRecord, stopPointer in
+        self.enumerateJobRecords(label: label, status: status, transaction: transaction) { jobRecord, _ in
             result.append(jobRecord)
         }
         return result
@@ -293,7 +297,7 @@ public class JobRecordFinder: NSObject, Finder {
         let queryFormat = String(format: "WHERE %@ = ? AND %@ = ? ORDER BY %@", JobRecordField.status.rawValue, JobRecordField.label.rawValue, JobRecordField.sortId.rawValue)
         let query = YapDatabaseQuery(string: queryFormat, parameters: [status.rawValue, label])
 
-        self.ext(transaction: transaction).enumerateKeysAndObjects(matching: query) { collection, key, object, stopPointer in
+        self.ext(transaction: transaction).enumerateKeysAndObjects(matching: query) { _, _, object, stopPointer in
             guard let jobRecord = object as? SSKJobRecord else {
                 owsFailDebug("expecting jobRecord but found: \(object)")
                 return

SignalServiceKit/src/Util/TypingIndicators.swift

@@ -56,7 +56,7 @@ public class TypingIndicatorsImpl: NSObject, TypingIndicators {
     public override init() {
         super.init()
 
-        AppReadiness.runNowOrWhenAppIsReady {
+        AppReadiness.runNowOrWhenAppWillBecomeReady {
             self.setup()
         }
     }

SignalShareExtension/ShareViewController.swift

@@ -262,9 +262,6 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
 
         AppVersion.sharedInstance().saeLaunchDidComplete()
 
-        Environment.shared.contactsManager.setup()
-        Environment.shared.contactsManager.startObserving()
-
         ensureRootViewController()
 
         // We don't need to use OWSMessageReceiver in the SAE.