Fixes calls rescheduling

LeStorage/ApiCall.swift

@@ -8,7 +8,7 @@
 import Foundation
 
 protocol SomeCall : Storable {
-    func execute() throws 
+//    func execute() throws 
     var lastAttemptDate: Date { get }
 }
 
@@ -44,10 +44,10 @@ class ApiCall<T : Storable> : ModelObject, Storable, SomeCall {
     }
     
     /// Executes the api call
-    func execute() throws {
+//    func execute() throws {
-        Task {
+//        Task {
-            try await Store.main.execute(apiCall: self)
+//            try await Store.main.execute(apiCall: self)
-        }
+//        }
-    }
+//    }
     
 }

LeStorage/Services.swift

@@ -21,10 +21,10 @@ enum ServiceError: Error {
 class Services {
     
     init(url: String) {
-        self._baseURL = url
+        self.baseURL = url
     }
     
-    fileprivate var _baseURL: String
+    fileprivate(set) var baseURL: String
     
     fileprivate var jsonDecoder: JSONDecoder = {
         let decoder = JSONDecoder()
@@ -50,7 +50,7 @@ class Services {
                 }
             default:
                 if let apiCallId, let type = (T.self as? any Storable.Type) {
-                    try Store.main.startCallsRescheduling(apiCallId: apiCallId, type: type)
+                    try Store.main.rescheduleApiCall(id: apiCallId, type: type)
                 }
             }
         }
@@ -63,20 +63,8 @@ class Services {
         return try self._baseRequest(servicePath: servicePath, method: .get)
     }
     
-//    fileprivate func postRequest(servicePath: String) throws -> URLRequest {
-//        return try self._baseRequest(servicePath: servicePath, method: .post)
-//    }
-//    
-//    fileprivate func putRequest(servicePath: String) throws -> URLRequest {
-//        return try self._baseRequest(servicePath: servicePath, method: .put)
-//    }
-//    
-//    fileprivate func deleteRequest(servicePath: String) throws -> URLRequest {
-//        return try self._baseRequest(servicePath: servicePath, method: .delete)
-//    }
-    
     fileprivate func _baseRequest(servicePath: String, method: Method) throws -> URLRequest {
-        let urlString = _baseURL + servicePath
+        let urlString = baseURL + servicePath
         guard let url = URL(string: urlString) else {
             throw ServiceError.urlCreationError(url: urlString)
         }
@@ -93,33 +81,7 @@ class Services {
         return try await self.runRequest(getRequest)
     }
     
-    func insert<T : Storable>(_ instance: T) async throws -> T {
-        let apiCall = try self._createCall(method: Method.post, instance: instance)
-        return try await self.runApiCall(apiCall)
-    }
-    
-    func update<T : Storable>(_ instance: T) async throws -> T {
-        let apiCall = try self._createCall(method: Method.put, instance: instance)
-        return try await self.runApiCall(apiCall)
-    }
-    
-    func delete<T : Storable>(_ instance: T) async throws -> T {
-        let apiCall = try self._createCall(method: Method.delete, instance: instance)
-        return try await self.runApiCall(apiCall)
-    }
-    
-    fileprivate func _createCall<T : Storable>(method: Method, instance: T) throws -> ApiCall<T> {
-        let jsonString = try instance.jsonString()
-        let url = self._baseURL + T.resourceName() + "/"
-        return ApiCall(url: url, method: method.rawValue, dataId: String(instance.id), body: jsonString)
-    }
-    
     func runApiCall<T : Storable>(_ apiCall: ApiCall<T>) async throws -> T {
-        
-        apiCall.lastAttemptDate = Date()
-        apiCall.attemptsCount += 1
-        try Store.main.registerApiCall(apiCall)
-
         let request = try self._request(from: apiCall)
         return try await self.runRequest(request, apiCallId: apiCall.id)
     }

LeStorage/Store.swift

@@ -40,8 +40,8 @@ public class Store {
     /// The dictionary of registered StoredCollections
     fileprivate var _collections: [String : any SomeCollection] = [:]
     
-    /// The dictionary of ApiCall StoredCollections corresponding to the synchronized registered collections
+//    /// The dictionary of ApiCall StoredCollections corresponding to the synchronized registered collections
-    fileprivate var _apiCallsCollections: [String : any SomeCollection] = [:]
+//    fileprivate var _apiCallsCollections: [String : any SomeCollection] = [:]
     
     /// The list of migrations to apply
     fileprivate var _migrations: [SomeMigration] = []
@@ -60,12 +60,12 @@ public class Store {
         let collection = StoredCollection<T>(synchronized: synchronized, store: Store.main, loadCompletion: nil)
         self._collections[T.resourceName()] = collection
         
-        if synchronized { // register additional collection for api calls
+//        if synchronized { // register additional collection for api calls
-            let apiCallCollection = StoredCollection<ApiCall<T>>(synchronized: false, store: Store.main, loadCompletion: { apiCallCollection in
+//            let apiCallCollection = StoredCollection<ApiCall<T>>(synchronized: false, store: Store.main, loadCompletion: { apiCallCollection in
-                self._rescheduleCalls(collection: apiCallCollection)
+//                self._rescheduleCalls(collection: apiCallCollection)
-            })
+//            })
-            self._apiCallsCollections[T.resourceName()] = apiCallCollection
+//            self._apiCallsCollections[T.resourceName()] = apiCallCollection
-        }
+//        }
             
         return collection
     }
@@ -148,78 +148,19 @@ public class Store {
     
     // MARK: - Api call rescheduling
     
-    /// Schedules all stored api calls from all collections
-    fileprivate func _rescheduleCalls<T : Storable>(collection: StoredCollection<ApiCall<T>>) {
-        for apiCall in collection {
-            self.startCallsRescheduling(apiCall: apiCall)
-        }
-    }
-    
-    /// Returns an API call collection corresponding to a type T
-    func apiCallCollection<T : Storable>() throws -> StoredCollection<ApiCall<T>> {
-        if let apiCallCollection = self._apiCallsCollections[T.resourceName()] as? StoredCollection<ApiCall<T>> {
-            return apiCallCollection
-        }
-        throw StoreError.apiCallCollectionNotRegistered(type: T.resourceName())
-    }
-    
-    /// Registers an api call into its collection
-    func registerApiCall<T : Storable>(_ apiCall: ApiCall<T>) throws {
-        
-        let collection: StoredCollection<ApiCall<T>> = try self.apiCallCollection()
-        
-        if let existingDataCall = collection.first(where: { $0.dataId == apiCall.dataId }) {
-            switch apiCall.method {
-            case Method.put.rawValue:
-                existingDataCall.body = apiCall.body
-                collection.addOrUpdate(instance: existingDataCall)
-            case Method.delete.rawValue:
-                try self.deleteApiCallById(existingDataCall.id, collectionName: T.resourceName())
-            default:
-                collection.addOrUpdate(instance: apiCall) // rewrite new attempt values
-            }
-        } else {
-            collection.addOrUpdate(instance: apiCall)
-        }
-        
-    }
-    
     /// Deletes an ApiCall by [id] and [collectionName]
     func deleteApiCallById(_ id: String, collectionName: String) throws {
-        
+        if let collection = self._collections[collectionName] {
-        if let collection = self._apiCallsCollections[collectionName] {
+            try collection.deleteApiCallById(id)
-            try collection.deleteById(id)
+        } else {
-            return
-        }
             throw StoreError.collectionNotRegistered(type: collectionName)
         }
-    
-    /// Schedule an ApiCall for its execution in the future
-    func startCallsRescheduling<T : Storable>(apiCall: ApiCall<T>) {
-        let delay = pow(2, 0 + apiCall.attemptsCount)
-        let seconds = NSDecimalNumber(decimal: delay).intValue
-        Logger.log("Rerun request in \(seconds) seconds...")
-        
-        DispatchQueue(label: "queue.scheduling", qos: .utility)
-            .asyncAfter(deadline: .now() + .seconds(seconds)) {
-            Logger.log("Try to execute api call...")
-            Task {
-                do {
-                    _ = try await self._executeApiCall(apiCall)
-                } catch {
-                    Logger.error(error)
-                }
-            }
-        }
-
     }
     
     /// Reschedule an ApiCall by id
-    func startCallsRescheduling<T : Storable>(apiCallId: String, type: T.Type) throws {
+    func rescheduleApiCall<T : Storable>(id: String, type: T.Type) throws {
-        let apiCallCollection: StoredCollection<ApiCall<T>> = try self.apiCallCollection()
+        let collection: StoredCollection<T> = try self.collection()
-        if let apiCall = apiCallCollection.findById(apiCallId) {
+        collection.rescheduleApiCallsIfNecessary()
-            self.startCallsRescheduling(apiCall: apiCall)
-        }
     }
     
     /// Executes an ApiCall
@@ -231,8 +172,12 @@ public class Store {
     }
     
     /// Executes an ApiCall
-    func execute<T>(apiCall: ApiCall<T>) async throws {
+//    func execute<T>(apiCall: ApiCall<T>) async throws {
-        _ = try await self._executeApiCall(apiCall)
+//        _ = try await self._executeApiCall(apiCall)
+//    }
+    
+    func execute<T>(apiCall: ApiCall<T>) async throws -> T {
+        return try await self._executeApiCall(apiCall)
     }
     
     /// Retrieves all the items on the server

LeStorage/StoredCollection.swift

@@ -7,9 +7,14 @@
 
 import Foundation
 
+enum StoredCollectionError : Error {
+    case unmanagedHTTPMethod(method: String)
+}
+
 protocol SomeCollection : Identifiable {
     func allItems() -> [any Storable]
     func deleteById(_ id: String) throws
+    func deleteApiCallById(_ id: String) throws
 }
 
 extension Notification.Name {
@@ -34,6 +39,8 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
     /// Provides fast access for instances if the collection has been instanced with [indexed] = true
     fileprivate var _index: [String : T]? = nil
     
+    fileprivate var apiCallsCollection: StoredCollection<ApiCall<T>>? = nil
+    
     /// Indicates whether the collection has changed, thus requiring a write operation
     fileprivate var _hasChanged: Bool = false {
         didSet {
@@ -58,6 +65,13 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
         }
         self._store = store
         self.loadCompletion = loadCompletion
+        
+        if synchronized {
+            self.apiCallsCollection = StoredCollection<ApiCall<T>>(synchronized: false, store: store, loadCompletion: { apiCallCollection in
+                self._rescheduleApiCalls()
+            })
+        }
+        
         self._load()
     }
     
@@ -131,8 +145,6 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
     /// Adds it if its id is not found, and otherwise updates it
     public func addOrUpdate(instance: T) {
         
-//        DispatchQueue(label: "lestorage.queue.items").sync {
-        
         defer {
             self._hasChanged = true
         }
@@ -146,7 +158,6 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
             self._index?[instance.stringId] = instance
             self._sendInsertionIfNecessary(instance)
         }
-//        }
         
     }
     
@@ -232,16 +243,56 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
     
     // MARK: - Synchronization
     
+    fileprivate func _callForInstance(_ instance: T, method: Method) throws -> ApiCall<T>? {
+        guard let apiCallCollection = self.apiCallsCollection else {
+            throw StoreError.apiCallCollectionNotRegistered(type: T.resourceName())
+        }
+
+        if let existingCall = apiCallCollection.first(where: { $0.dataId == instance.id }) {
+            switch existingCall.method {
+            case Method.post.rawValue, Method.put.rawValue:
+                existingCall.body = try instance.jsonString()
+                return existingCall
+            case Method.delete.rawValue:
+                try self.deleteApiCallById(existingCall.id)
+                return nil
+            default:
+                throw StoredCollectionError.unmanagedHTTPMethod(method: existingCall.method)
+            }
+
+        } else {
+            return try self._createCall(instance, method: method)
+        }
+    }
+    
+    fileprivate func _createCall(_ instance: T, method: Method) throws -> ApiCall<T> {
+        guard let baseURL = _store.service?.baseURL else {
+            throw StoreError.missingService
+        }
+        let jsonString = try instance.jsonString()
+        let url = baseURL + T.resourceName() + "/"
+        return ApiCall(url: url, method: method.rawValue, dataId: String(instance.id), body: jsonString)
+    }
+
+    fileprivate func _prepareCall(apiCall: ApiCall<T>) {
+        apiCall.lastAttemptDate = Date()
+        apiCall.attemptsCount += 1
+        self.apiCallsCollection?.addOrUpdate(instance: apiCall)
+    }
+    
     /// Sends an insert api call for the provided [instance]
     fileprivate func _sendInsertionIfNecessary(_ instance: T) {
         guard self.synchronized else {
             return
         }
-        Logger.log("Call service...")
         Task {
             do {
-                let _ = try await self._store.service?.insert(instance)
+                if let apiCall = try self._callForInstance(instance, method: Method.post) {
+                    self._prepareCall(apiCall: apiCall)
+                    _ = try await self._store.execute(apiCall: apiCall)
+                }
             } catch {
+                self.rescheduleApiCallsIfNecessary()
                 Logger.error(error)
             }
         }
@@ -256,9 +307,15 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
         
         Task {
             do {
-                let _ = try await self._store.service?.update(instance)
+                if let apiCall = try self._callForInstance(instance, method: Method.put) {
+                    self._prepareCall(apiCall: apiCall)
+                    _ = try await self._store.execute(apiCall: apiCall)
+                }
+                
+//                let _ = try await self._store.service?.update(instance)
             } catch {
                 Logger.error(error)
+                self.rescheduleApiCallsIfNecessary()
             }
         }
         
@@ -272,12 +329,77 @@ public class StoredCollection<T : Storable> : RandomAccessCollection, SomeCollec
         
         Task {
             do {
-                let _ = try await self._store.service?.delete(instance)
+                
+                if let apiCall = try self._callForInstance(instance, method: Method.delete) {
+                    self._prepareCall(apiCall: apiCall)
+                    _ = try await self._store.execute(apiCall: apiCall)
+                }
+                
+//                let _ = try await self._store.service?.delete(instance)
             } catch {
                 Logger.error(error)
+                self.rescheduleApiCallsIfNecessary()
+            }
         }
+        
     }
     
+    // 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
+    
+    func rescheduleApiCallsIfNecessary() {
+        if !self._isRetryingCalls {
+            self._rescheduleApiCalls()
+        }
+    }
+    
+    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 {
+                    let _ = try await Store.main.execute(apiCall: apiCall)
+                } catch {
+                    Logger.error(error)
+                }
+            }
+            
+            if apiCallsCollection.isEmpty {
+                self._isRetryingCalls = false
+            } else {
+                self._rescheduleApiCalls()
+            }
+            
+        }
+        
+    }
+        
+    func deleteApiCallById(_ id: String) throws {
+        guard let apiCallsCollection else {
+            throw StoreError.apiCallCollectionNotRegistered(type: T.resourceName())
+        }
+        try apiCallsCollection.deleteById(id)
     }
     
     // MARK: - RandomAccessCollection

LeStorage/Utils/Collection+Extension.swift

@@ -26,3 +26,7 @@ extension Array {
     }
     
 }
+
+extension RandomAccessCollection {
+    var isNotEmpty: Bool { return !self.isEmpty }
+}