Refactor asynchronicity for API calls collections

LeStorage.xcodeproj/project.pbxproj

@@ -14,6 +14,7 @@
 		C425D4582B6D2519002A7B48 /* Store.swift in Sources */ = {isa = PBXBuildFile; fileRef = C425D4572B6D2519002A7B48 /* Store.swift */; };
 		C456EFE22BE52379007388E2 /* StoredSingleton.swift in Sources */ = {isa = PBXBuildFile; fileRef = C456EFE12BE52379007388E2 /* StoredSingleton.swift */; };
 		C45D35912C0A1DB5000F379F /* FailedAPICall.swift in Sources */ = {isa = PBXBuildFile; fileRef = C45D35902C0A1DB5000F379F /* FailedAPICall.swift */; };
+		C49B6E502C2089B6002BDE1B /* ApiCallCollection.swift in Sources */ = {isa = PBXBuildFile; fileRef = C49B6E4F2C2089B6002BDE1B /* ApiCallCollection.swift */; };
 		C49EF0242BD6BDC50077B5AA /* FileManager+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = C49EF0232BD6BDC50077B5AA /* FileManager+Extensions.swift */; };
 		C4A47D4F2B6D280200ADC637 /* StoredCollection.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4A47D4E2B6D280200ADC637 /* StoredCollection.swift */; };
 		C4A47D512B6D2C4E00ADC637 /* Codable+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4A47D502B6D2C4E00ADC637 /* Codable+Extensions.swift */; };
@@ -51,6 +52,7 @@
 		C425D4572B6D2519002A7B48 /* Store.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Store.swift; sourceTree = "<group>"; };
 		C456EFE12BE52379007388E2 /* StoredSingleton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoredSingleton.swift; sourceTree = "<group>"; };
 		C45D35902C0A1DB5000F379F /* FailedAPICall.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FailedAPICall.swift; sourceTree = "<group>"; };
+		C49B6E4F2C2089B6002BDE1B /* ApiCallCollection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ApiCallCollection.swift; sourceTree = "<group>"; };
 		C49EF0232BD6BDC50077B5AA /* FileManager+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "FileManager+Extensions.swift"; sourceTree = "<group>"; };
 		C4A47D4E2B6D280200ADC637 /* StoredCollection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoredCollection.swift; sourceTree = "<group>"; };
 		C4A47D502B6D2C4E00ADC637 /* Codable+Extensions.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Codable+Extensions.swift"; sourceTree = "<group>"; };
@@ -113,6 +115,7 @@
 				C425D4372B6D24E1002A7B48 /* LeStorage.h */,
 				C425D4382B6D24E1002A7B48 /* LeStorage.docc */,
 				C4A47D9D2B7CFFF500ADC637 /* Codables */,
+				C49B6E4F2C2089B6002BDE1B /* ApiCallCollection.swift */,
 				C4A47D6C2B71364600ADC637 /* ModelObject.swift */,
 				C4A47D602B6D3C1300ADC637 /* Services.swift */,
 				C425D4572B6D2519002A7B48 /* Store.swift */,
@@ -294,6 +297,7 @@
 				C49EF0242BD6BDC50077B5AA /* FileManager+Extensions.swift in Sources */,
 				C425D4582B6D2519002A7B48 /* Store.swift in Sources */,
 				C45D35912C0A1DB5000F379F /* FailedAPICall.swift in Sources */,
+				C49B6E502C2089B6002BDE1B /* ApiCallCollection.swift in Sources */,
 				C4A47D6B2B71244100ADC637 /* Collection+Extension.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

LeStorage/ApiCallCollection.swift

@@ -0,0 +1,260 @@
+//
+//  SafeCollection.swift
+//  LeStorage
+//
+//  Created by Laurent Morvillier on 17/06/2024.
+//
+
+import Foundation
+
+actor ApiCallCollection<T: Storable> {
+    
+    /// The reference to the Store
+    fileprivate var _store: Store
+
+    fileprivate(set) var items: [ApiCall<T>] = []
+    
+    /// number of time an execution loop has been called
+    fileprivate var _attemptLoops: Int = 0
+    
+    /// Indicates if the collection is currently retrying ApiCalls
+    fileprivate var _isRetryingCalls: Bool = false
+
+    fileprivate var _hasChanged: Bool = false {
+        didSet {
+            self._write()
+        }
+    }
+
+    init(store: Store) {
+        self._store = store
+    }
+    
+    /// Starts the JSON file decoding synchronously or asynchronously
+    func loadFromFile() throws {
+        try self._decodeJSONFile()
+    }
+
+    fileprivate func _urlForJSONFile() throws -> URL {
+        return try ApiCall<T>.urlForJSONFile()
+    }
+    
+    /// Decodes the json file into the items array
+    fileprivate func _decodeJSONFile() throws {
+        let fileURL = try self._urlForJSONFile()
+        
+        if FileManager.default.fileExists(atPath: fileURL.path()) {
+            let jsonString: String = try FileUtils.readFile(fileURL: fileURL)
+            let decoded: [ApiCall<T>] = try jsonString.decodeArray() ?? []
+            Logger.log("loaded \(T.fileName()) with \(decoded.count) items")
+            self.items = decoded
+            
+            self.rescheduleApiCallsIfNecessary()
+
+        }
+        
+    }
+
+    fileprivate func _write() {
+        let fileName = ApiCall<T>.fileName()
+        DispatchQueue(label: "lestorage.queue.write", qos: .utility).asyncAndWait {
+            Logger.log("Start write to \(fileName)...")
+            do {
+                let jsonString: String = try self.items.jsonString()
+                try T.writeToStorageDirectory(content: jsonString, fileName: fileName)
+            } catch {
+                Logger.error(error)
+            }
+            Logger.log("End write")
+        }
+    }
+    
+    func addOrUpdate(_ instance: ApiCall<T>) {
+        if let index = self.items.firstIndex(where: { $0.id == instance.id }) {
+            self.items[index] = instance
+        } else {
+            self.items.append(instance)
+        }
+        self._hasChanged = true
+    }
+    
+    /// Deletes an API call by [id]
+    func deleteById(_ id: String) {
+        self.items.removeAll(where: { $0.id == id })
+        self._hasChanged = true
+    }
+    
+    func deleteByDataId(_ id: String) {
+        if let apiCallIndex = self.items.firstIndex(where: { $0.dataId == id }) {
+            self.items.remove(at: apiCallIndex)
+            self._hasChanged = true
+        }
+    }
+    
+    func findById(_ id: String) -> ApiCall<T>? {
+        return self.items.first(where: { $0.id == id })
+    }
+    
+    func reset() {
+        self.items.removeAll()
+        
+        do {
+            let url: URL = try self._urlForJSONFile()
+            if FileManager.default.fileExists(atPath: url.path()) {
+                try FileManager.default.removeItem(at: url)
+            }
+        } catch {
+            Logger.error(error)
+        }
+    }
+
+    fileprivate func _rescheduleApiCalls() {
+        
+        guard self.items.isNotEmpty else {
+            return
+        }
+        
+        self._isRetryingCalls = true
+        self._attemptLoops += 1
+        
+        Task {
+            
+            let delay = pow(2, self._attemptLoops)
+            let seconds = NSDecimalNumber(decimal: delay).intValue
+            Logger.log("wait for \(seconds) sec")
+            try await Task.sleep(until: .now + .seconds(seconds))
+            
+            let apiCallsCopy = self.items
+            for apiCall in apiCallsCopy {
+                apiCall.attemptsCount += 1
+                apiCall.lastAttemptDate = Date()
+                               
+                do {
+                    try await self._executeApiCall(apiCall)
+//                    let _ = try await Store.main.execute(apiCall: apiCall)
+                } catch {
+                    Logger.error(error)
+                }
+            }
+            
+            if self.items.isEmpty {
+                self._isRetryingCalls = false
+            } else {
+                self._rescheduleApiCalls()
+            }
+            
+        }
+        
+    }
+    
+    // MARK: - Synchronization
+    
+    /// Returns an APICall instance for the Storable [instance] and an HTTP [method]
+    /// The method updates existing calls or creates a new one
+    fileprivate func _callForInstance(_ instance: T, method: HTTPMethod) throws -> ApiCall<T>? {
+
+        if let existingCall = self.items.first(where: { $0.dataId == instance.id }) {
+            switch method {
+            case .delete:
+                self.deleteById(existingCall.id) // delete the existing call as we don't need it
+                if existingCall.method == HTTPMethod.post {
+                    return nil // if the post has not been done, we can just stop here
+                } else {
+                    return try self._createCall(instance, method: method) // otherwise it's a put and we want to send the delete
+                }
+            default: // here we should only trying to PUT, so we update the existing POST/PUT with the instance new values
+                existingCall.body = try instance.jsonString()
+                return existingCall
+            }
+        } else {
+            return try self._createCall(instance, method: method)
+        }
+    }
+    
+    /// Creates an API call for the Storable [instance] and an HTTP [method]
+    fileprivate func _createCall(_ instance: T, method: HTTPMethod) throws -> ApiCall<T> {
+        let jsonString = try instance.jsonString()
+        return ApiCall(method: method, dataId: String(instance.id), body: jsonString)
+    }
+
+    /// Prepares a call for execution by updating its properties and adding it to its collection for storage
+    fileprivate func _prepareCall(apiCall: ApiCall<T>) throws {
+        apiCall.lastAttemptDate = Date()
+        apiCall.attemptsCount += 1
+        self.addOrUpdate(apiCall)
+    }
+    
+    /// Reschedule API calls if necessary
+    func rescheduleApiCallsIfNecessary() {
+        if !self._isRetryingCalls {
+            self._rescheduleApiCalls()
+        }
+    }
+    
+    /// Sends an insert api call for the provided [instance]
+    func sendInsertion(_ instance: T) {
+        Task {
+            do {
+                try await self._synchronize(instance, method: HTTPMethod.post)
+            } catch {
+                self.rescheduleApiCallsIfNecessary()
+                Logger.error(error)
+            }
+        }
+    }
+    
+    /// Sends an update api call for the provided [instance]
+    func sendUpdate(_ instance: T) {
+        Task {
+            do {
+                try await self._synchronize(instance, method: HTTPMethod.put)
+            } catch {
+                self.rescheduleApiCallsIfNecessary()
+                Logger.error(error)
+            }
+        }
+
+    }
+    
+    /// Sends an delete api call for the provided [instance]
+    func sendDeletion(_ instance: T) {
+        Task {
+            do {
+                try await self._synchronize(instance, method: HTTPMethod.delete)
+            } catch {
+                self.rescheduleApiCallsIfNecessary()
+                Logger.error(error)
+            }
+        }
+
+    }
+    
+    fileprivate func _synchronize(_ instance: T, method: HTTPMethod) async throws {
+        if let apiCall = try self._callForInstance(instance, method: method) {
+            try self._prepareCall(apiCall: apiCall)
+            try await self._executeApiCall(apiCall)
+        }
+    }
+    
+    fileprivate func _executeApiCall(_ apiCall: ApiCall<T>) async throws {
+        let result = try await self._store.execute(apiCall: apiCall)
+        switch apiCall.method {
+        case .post:
+            if let instance = self.findById(result.stringId) {
+                self._hasChanged = instance.copyFromServerInstance(result)
+            }
+        default:
+            break
+        }
+        Logger.log("")
+    }
+    
+    func contentOfApiCallFile() -> String? {
+        guard let fileURL = try? self._urlForJSONFile() else { return nil }
+        if FileManager.default.fileExists(atPath: fileURL.path()) {
+            return try? FileUtils.readFile(fileURL: fileURL)
+        }
+        return nil
+    }
+
+}

LeStorage/Services.swift

@@ -102,9 +102,7 @@ public class Services {
             case 200..<300:
                 if let apiCallId,
                     let collectionName = (T.self as? any Storable.Type)?.resourceName() {
-                    try await MainActor.run {
+                    try await Store.main.deleteApiCallById(apiCallId, collectionName: collectionName)
-                        try Store.main.deleteApiCallById(apiCallId, collectionName: collectionName)
-                    }
                 }
             default:
                 /*

LeStorage/Storable.swift

@@ -47,4 +47,20 @@ extension Storable {
         return path
     }
     
+    static func storageDirectoryPath() throws -> URL {
+        return try FileUtils.pathForDirectoryInDocuments(directory: Store.storageDirectory)
+    }
+    
+    static func writeToStorageDirectory(content: String, fileName: String) throws {
+        var fileURL = try self.storageDirectoryPath()
+        fileURL.append(component: fileName)
+        try content.write(to: fileURL, atomically: false, encoding: .utf8)
+    }
+    
+    static func urlForJSONFile() throws -> URL {
+        var storageDirectory = try self.storageDirectoryPath()
+        storageDirectory.append(component: self.fileName())
+        return storageDirectory
+    }
+    
 }

LeStorage/Store.swift

@@ -199,9 +199,9 @@ public class Store {
     // MARK: - Api call rescheduling
     
     /// Deletes an ApiCall by [id] and [collectionName]
-    func deleteApiCallById(_ id: String, collectionName: String) throws {
+    func deleteApiCallById(_ id: String, collectionName: String) async throws {
         if let collection = self._collections[collectionName] {
-            try collection.deleteApiCallById(id)
+            try await collection.deleteApiCallById(id)
         } else {
             throw StoreError.collectionNotRegistered(type: collectionName)
         }
@@ -257,8 +257,13 @@ public class Store {
     }
     
     /// Returns whether any collection has pending API calls
-    public func hasPendingAPICalls() -> Bool {
+    public func hasPendingAPICalls() async -> Bool {
-        return self._collections.values.contains(where: { $0.hasPendingAPICalls() })
+        for collection in self._collections.values {
+            if await collection.hasPendingAPICalls() {
+                return true
+            }
+        }
+        return false
     }
 
     /// Returns the names of all collections
@@ -267,8 +272,8 @@ public class Store {
     }
     
     /// Returns the content of the api call file
-    public func apiCallsFile(resourceName: String) -> String {
+    public func apiCallsFileContent(resourceName: String) async -> String {
-        return self._collections[resourceName]?.contentOfApiCallFile() ?? ""
+        return await self._collections[resourceName]?.contentOfApiCallFile() ?? ""
     }
     
     /// This method triggers the framework to save and send failed api calls
@@ -282,23 +287,29 @@ public class Store {
         
         guard let failedAPICallsCollection = self._failedAPICallsCollection, 
                 let collection = self._collections[collectionName],
-              collectionName != FailedAPICall.resourceName(),
+              collectionName != FailedAPICall.resourceName()
-                let apiCall = try? collection.apiCallById(apiCallId) else {
+                 else {
             return
         }
         
-        if !failedAPICallsCollection.contains(where: { $0.callId == apiCallId }) && apiCall.attemptsCount > 6 {
+        Task {
+            if let apiCall = await collection.apiCallById(apiCallId) {
+                
+                if !failedAPICallsCollection.contains(where: { $0.callId == apiCallId }) && apiCall.attemptsCount > 6 {
 
-            do {
+                    do {
-                let authValue = request.allHTTPHeaderFields?["Authorization"]
+                        let authValue = request.allHTTPHeaderFields?["Authorization"]
-                let string = try apiCall.jsonString()
+                        let string = try apiCall.jsonString()
-                let failedAPICall = FailedAPICall(callId: apiCall.id, type: collectionName, apiCall: string, error: error, authentication: authValue)
+                        let failedAPICall = FailedAPICall(callId: apiCall.id, type: collectionName, apiCall: string, error: error, authentication: authValue)
-                try failedAPICallsCollection.addOrUpdate(instance: failedAPICall)
+                        try failedAPICallsCollection.addOrUpdate(instance: failedAPICall)
-            } catch {
+                    } catch {
-                Logger.error(error)
+                        Logger.error(error)
+                    }
+                }
             }
         }
         
+        
     }
     
     func logFailedAPICall(request: URLRequest, error: String) {

LeStorage/StoredCollection.swift

@@ -13,22 +13,34 @@ enum StoredCollectionError: Error {
     case missingInstance
 }
 
+protocol CollectionHolder {
+    associatedtype Item
+    
+    var items: [Item] { get }
+}
+
+extension CollectionHolder {
+    
+}
+
 protocol SomeCollection: Identifiable {
     var resourceName: String { get }
     var synchronized: Bool { get }
 
     func allItems() -> [any Storable]
     func deleteById(_ id: String) throws
-    func deleteApiCallById(_ id: String) throws
     
     func loadDataFromServerIfAllowed() async throws
 
-    func hasPendingAPICalls() -> Bool
-    func contentOfApiCallFile() -> String?
-    
     func reset()
     func resetApiCalls()
-    func apiCallById(_ id: String) throws -> (any SomeCall)?
+    
+    func deleteApiCallById(_ id: String) async throws
+    func apiCallById(_ id: String) async -> (any SomeCall)?
+    
+    func hasPendingAPICalls() async -> Bool
+    func contentOfApiCallFile() async -> String?
+    
 }
 
 extension Notification.Name {
@@ -36,7 +48,7 @@ extension Notification.Name {
     public static let CollectionDidChange: Notification.Name = Notification.Name.init("notification.collectionDidChange")
 }
 
-public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollection {
+public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollection, CollectionHolder {
     
     /// If true, will synchronize the data with the provided server located at the Store's synchronizationApiURL
     let synchronized: Bool
@@ -60,7 +72,7 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
     fileprivate var _indexes: [String : T]? = nil
     
     /// Collection of API calls used to store HTTP calls
-    fileprivate var apiCallsCollection: StoredCollection<ApiCall<T>>? = nil
+    fileprivate var apiCallsCollection: ApiCallCollection<T>? = nil
     
     /// Indicates whether the collection has changed, thus requiring a write operation
     fileprivate var _hasChanged: Bool = false {
@@ -94,9 +106,20 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         self.loadCompletion = loadCompletion
         
         if synchronized {
-            self.apiCallsCollection = StoredCollection<ApiCall<T>>(synchronized: false, store: store, loadCompletion: { apiCallCollection in
+            let apiCallCollection = ApiCallCollection<T>(store: store)
-                self._rescheduleApiCalls()
+            self.apiCallsCollection = apiCallCollection
-            })
+            Task {
+                do {
+                    try await apiCallCollection.loadFromFile()
+                } catch {
+                    Logger.error(error)
+                }
+            }
+            
+            
+//            self.apiCallsCollection = StoredCollection<ApiCall<T>>(synchronized: false, store: store, loadCompletion: { apiCallCollection in
+//                self._rescheduleApiCalls()
+//            })
         }
         
         self._load()
@@ -216,20 +239,20 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         // update
         if let index = self.items.firstIndex(where: { $0.id == instance.id }) {
             self.items[index] = instance
-            try self._sendUpdateIfNecessary(instance)
+            self._sendUpdateIfNecessary(instance)
         } else { // insert
             self.items.append(instance)
-            try self._sendInsertionIfNecessary(instance)
+            self._sendInsertionIfNecessary(instance)
         }
         self._indexes?[instance.stringId] = instance
 
     }
     
-    public func writeChangeAndInsertOnServer(instance: T) throws {
+    public func writeChangeAndInsertOnServer(instance: T) {
         defer {
             self._hasChanged = true
         }
-        try self._sendInsertionIfNecessary(instance)
+        self._sendInsertionIfNecessary(instance)
     }
     
     /// A method the treat the collection as a single instance holder
@@ -251,8 +274,8 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         try instance.deleteDependencies()
         self.items.removeAll { $0.id == instance.id }
         self._indexes?.removeValue(forKey: instance.stringId)
-        try self._sendDeletionIfNecessary(instance)
         
+        self._sendDeletionIfNecessary(instance)
     }
     
     /// Deletes all items of the sequence by id
@@ -266,7 +289,7 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
             try instance.deleteDependencies()
             self.items.removeAll { $0.id == instance.id }
             self._indexes?.removeValue(forKey: instance.stringId)
-            try self._sendDeletionIfNecessary(instance)
+            self._sendDeletionIfNecessary(instance)
         }
     }
     
@@ -285,12 +308,12 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
             if let index = self.items.firstIndex(where: { $0.id == instance.id }) {
                 self.items[index] = instance
                 if shouldSync {
-                    try self._sendUpdateIfNecessary(instance)
+                    self._sendUpdateIfNecessary(instance)
                 }
             } else { // insert
                 self.items.append(instance)
                 if shouldSync {
-                    try self._sendInsertionIfNecessary(instance)
+                    self._sendInsertionIfNecessary(instance)
                 }
             }
             self._indexes?[instance.stringId] = instance
@@ -322,9 +345,9 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         for item in items {
             self.items.removeAll(where: { $0.id == item.id })
             
-            /// remove related API call if existing
+            Task {
-            if let apiCallIndex = self.apiCallsCollection?.firstIndex(where: { $0.dataId == item.id }) {
+                /// Remove related API call if existing
-                self.apiCallsCollection?.items.remove(at: apiCallIndex)
+                await self.apiCallsCollection?.deleteByDataId(item.stringId)
             }
         }
         
@@ -335,6 +358,16 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
         try self.delete(contentOfs: self.items)
     }
     
+    // MARK: - Some Collection
+
+    func deleteApiCallById(_ id: String) async throws {
+        await self.apiCallsCollection?.deleteById(id)
+    }
+    
+    func apiCallById(_ id: String) async -> (any SomeCall)? {
+        return await self.apiCallsCollection?.findById(id)
+    }
+
     // MARK: - SomeCall
     
     /// Returns the collection items as [any Storable]
@@ -395,202 +428,110 @@ public class StoredCollection<T: Storable>: RandomAccessCollection, SomeCollecti
     /// Removes the collection related API calls collection
     public func resetApiCalls() {
         if let apiCallsCollection = self.apiCallsCollection {
-            apiCallsCollection.reset()
+            Task {
-        }
+                await apiCallsCollection.reset()
-    }
-    
-    // MARK: - Synchronization
-    
-    /// Returns an APICall instance for the Storable [instance] and an HTTP [method]
-    /// The method updates existing calls or creates a new one
-    fileprivate func _callForInstance(_ instance: T, method: HTTPMethod) throws -> ApiCall<T>? {
-        guard let apiCallCollection = self.apiCallsCollection else {
-            throw StoredCollectionError.missingApiCallCollection
-        }
-
-        if let existingCall = apiCallCollection.first(where: { $0.dataId == instance.id }) {
-            switch method {
-            case .delete:
-                try self.deleteApiCallById(existingCall.id) // delete the existing call as we don't need it
-                if existingCall.method == HTTPMethod.post {
-                    return nil // if the post has not been done, we can just stop here
-                } else {
-                    return try self._createCall(instance, method: method) // otherwise it's a put and we want to send the delete
-                }
-            default: // here we should only trying to PUT, so we update the existing POST/PUT with the instance new values
-                existingCall.body = try instance.jsonString()
-                return existingCall
             }
-        } else {
-            return try self._createCall(instance, method: method)
         }
     }
     
-    /// Creates an API call for the Storable [instance] and an HTTP [method]
+    // MARK: - Reschedule calls
-    fileprivate func _createCall(_ instance: T, method: HTTPMethod) throws -> ApiCall<T> {
-        let jsonString = try instance.jsonString()
-        return ApiCall(method: method, dataId: String(instance.id), body: jsonString)
-    }
-
-    /// Prepares a call for execution by updating its properties and adding it to its collection for storage
-    fileprivate func _prepareCall(apiCall: ApiCall<T>) throws {
-        apiCall.lastAttemptDate = Date()
-        apiCall.attemptsCount += 1
-        try self.apiCallsCollection?.addOrUpdate(instance: apiCall)
-    }
     
     /// Sends an insert api call for the provided [instance]
-    fileprivate func _sendInsertionIfNecessary(_ instance: T) throws {
+    fileprivate func _sendInsertionIfNecessary(_ instance: T) {
         guard self.synchronized, Store.main.collectionsCanSynchronize else {
             return
         }
-        
         Task {
-            do {
+            await self.apiCallsCollection?.sendInsertion(instance)
-                try await self._synchronize(instance, method: HTTPMethod.post)
-            } catch {
-                self.rescheduleApiCallsIfNecessary()
-                Logger.error(error)
-            }
         }
     }
     
     /// Sends an update api call for the provided [instance]
-    fileprivate func _sendUpdateIfNecessary(_ instance: T) throws {
+    fileprivate func _sendUpdateIfNecessary(_ instance: T) {
         guard self.synchronized, self._sendsUpdate, Store.main.collectionsCanSynchronize else {
             return
         }
         Task {
-            do {
+            await self.apiCallsCollection?.sendUpdate(instance)
-                try await self._synchronize(instance, method: HTTPMethod.put)
-            } catch {
-                self.rescheduleApiCallsIfNecessary()
-                Logger.error(error)
-            }
         }
-
     }
     
     /// Sends an delete api call for the provided [instance]
-    fileprivate func _sendDeletionIfNecessary(_ instance: T) throws {
+    fileprivate func _sendDeletionIfNecessary(_ instance: T) {
         guard self.synchronized, Store.main.collectionsCanSynchronize else {
             return
         }
         Task {
-            do {
+            await self.apiCallsCollection?.sendDeletion(instance)
-                try await self._synchronize(instance, method: HTTPMethod.delete)
-            } catch {
-                self.rescheduleApiCallsIfNecessary()
-                Logger.error(error)
-            }
-        }
-
-    }
-    
-    fileprivate func _synchronize(_ instance: T, method: HTTPMethod) async throws {
-        if let apiCall = try self._callForInstance(instance, method: method) {
-            try self._prepareCall(apiCall: apiCall)
-            try await self._executeApiCall(apiCall)
-        }
-    }
-    
-    fileprivate func _executeApiCall(_ apiCall: ApiCall<T>) async throws {
-        let result = try await self._store.execute(apiCall: apiCall)
-        switch apiCall.method {
-        case .post:
-//            DispatchQueue.main.async {
-                if let instance = self.findById(result.stringId) {
-                    self._hasChanged = instance.copyFromServerInstance(result)
-                }
-//            }
-        default:
-            break
         }
-        Logger.log("")
     }
     
-    // MARK: - Reschedule calls
-    
-    /// number of time an execution loop has been called
-    fileprivate var _attemptLoops: Int = 0
-    
-    /// Indicates if the collection is currently retrying ApiCalls
-    fileprivate var _isRetryingCalls: Bool = false
-    
-    /// Reschedule API calls if necessary
     func rescheduleApiCallsIfNecessary() {
-        if !self._isRetryingCalls {
-            self._rescheduleApiCalls()
-        }
-    }
-    
-    /// Reschedule API calls
-    fileprivate func _rescheduleApiCalls() {
-        
-        guard let apiCallsCollection, apiCallsCollection.isNotEmpty else {
-            return
-        }
-        
-        self._isRetryingCalls = true
-        self._attemptLoops += 1
-        
         Task {
-            
+            await self.apiCallsCollection?.rescheduleApiCallsIfNecessary()
-            let delay = pow(2, self._attemptLoops)
-            let seconds = NSDecimalNumber(decimal: delay).intValue
-            Logger.log("wait for \(seconds) sec")
-            try await Task.sleep(until: .now + .seconds(seconds))
-            
-            let apiCallsCopy = apiCallsCollection.items
-            for apiCall in apiCallsCopy {
-                apiCall.attemptsCount += 1
-                apiCall.lastAttemptDate = Date()
-                               
-                do {
-                    try await self._executeApiCall(apiCall)
-//                    let _ = try await Store.main.execute(apiCall: apiCall)
-                } catch {
-                    Logger.error(error)
-                }
-            }
-            
-            if apiCallsCollection.isEmpty {
-                self._isRetryingCalls = false
-            } else {
-                self._rescheduleApiCalls()
-            }
-            
         }
-        
-    }
-        
-    /// Deletes an API call by [id]
-    func deleteApiCallById(_ id: String) throws {
-        guard let apiCallsCollection else {
-            throw StoreError.apiCallCollectionNotRegistered(type: T.resourceName())
-        }
-        try apiCallsCollection.deleteById(id)
     }
     
-    func apiCallById(_ id: String) throws -> (any SomeCall)? {
+//
-        guard let apiCallsCollection else {
+//    /// number of time an execution loop has been called
-            throw StoreError.apiCallCollectionNotRegistered(type: T.resourceName())
+//    fileprivate var _attemptLoops: Int = 0
-        }
+//    
-        return apiCallsCollection.findById(id)
+//    /// Indicates if the collection is currently retrying ApiCalls
+//    fileprivate var _isRetryingCalls: Bool = false
+//    
+//    /// Reschedule API calls
+//    fileprivate func _rescheduleApiCalls() {
+//        
+//        guard let apiCallsCollection, apiCallsCollection.isNotEmpty else {
+//            return
+//        }
+//        
+//        self._isRetryingCalls = true
+//        self._attemptLoops += 1
+//        
+//        Task {
+//            
+//            let delay = pow(2, self._attemptLoops)
+//            let seconds = NSDecimalNumber(decimal: delay).intValue
+//            Logger.log("wait for \(seconds) sec")
+//            try await Task.sleep(until: .now + .seconds(seconds))
+//            
+//            let apiCallsCopy = apiCallsCollection.items
+//            for apiCall in apiCallsCopy {
+//                apiCall.attemptsCount += 1
+//                apiCall.lastAttemptDate = Date()
+//                               
+//                do {
+//                    try await self._executeApiCall(apiCall)
+////                    let _ = try await Store.main.execute(apiCall: apiCall)
+//                } catch {
+//                    Logger.error(error)
+//                }
+//            }
+//            
+//            if apiCallsCollection.isEmpty {
+//                self._isRetryingCalls = false
+//            } else {
+//                self._rescheduleApiCalls()
+//            }
+//            
+//        }
+//        
+//    }
+        
+    func contentOfApiCallFile() async -> String? {
+        return await self.apiCallsCollection?.contentOfApiCallFile()
+//        guard let fileURL = try? self.apiCallsCollection?._urlForJSONFile() else { return nil }
+//        if FileManager.default.fileExists(atPath: fileURL.path()) {
+//            return try? FileUtils.readFile(fileURL: fileURL)
+//        }
+//        return nil
     }
     
     /// Returns if the API call collection is not empty
-    func hasPendingAPICalls() -> Bool {
+    func hasPendingAPICalls() async -> Bool {
         guard let apiCallsCollection else { return false }
-        return apiCallsCollection.isNotEmpty
+        return await apiCallsCollection.items.isNotEmpty
-    }
-    
-    func contentOfApiCallFile() -> String? {
-        guard let fileURL = try? self.apiCallsCollection?._urlForJSONFile() else { return nil }
-        if FileManager.default.fileExists(atPath: fileURL.path()) {
-            return try? FileUtils.readFile(fileURL: fileURL)
-        }
-        return nil
     }
     
     // MARK: - RandomAccessCollection