Fix api call creation

LeStorage/ApiCallCollection.swift

@@ -216,15 +216,38 @@ actor ApiCallCollection<T: Storable>: SomeCallCollection {
 
     /// 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) async throws -> ApiCall<T>? {
+    func callForInstance(_ instance: T, method: HTTPMethod) throws -> ApiCall<T>? {
 
         // cleanup
         let existingCalls = self.items.filter { $0.dataId == instance.stringId }
-        self._deleteCalls(existingCalls)
+        if existingCalls.count > 1 {
+            StoreCenter.main.log(message: "There are multiple calls registered for a single item: \(T.resourceName()), id = \(instance.stringId)")
+        }
+        let currentHTTPMethod = existingCalls.first?.method
+        var call: ApiCall<T>? = nil
+        if let currentHTTPMethod {
+            switch (currentHTTPMethod, method) {
+            case (.post, .put):
+                call = try self._createCall(instance, method: .post)
+            case (.post, .delete):
+                self._deleteCalls(existingCalls)
+                return nil
+            case (.put, .put):
+                call = try self._createCall(instance, method: .put)
+            case (.put, .delete):
+                call = try self._createCall(instance, method: .delete)
+            default:
+                StoreCenter.main.log(message: "case \(currentHTTPMethod) / \(method) should not happen")
+            }
+        } else {
+            call = try self._createCall(instance, method: method)
+        }
+        
+        if let call {
+            self._deleteCalls(existingCalls)
+            self._prepareCall(apiCall: call)
+        }
         
-        // create
-        let call = try self._createCall(instance, method: method)
-        self._prepareCall(apiCall: call)
         return call
     }
     
@@ -291,7 +314,7 @@ actor ApiCallCollection<T: Storable>: SomeCallCollection {
 
     /// Initiates the process of sending the data with the server
     fileprivate func _synchronize<V: Decodable>(_ instance: T, method: HTTPMethod) async throws -> V? {
-        if let apiCall = try await self._callForInstance(instance, method: method) {
+        if let apiCall = try self.callForInstance(instance, method: method) {
             return try await self._executeApiCall(apiCall)
         } else {
             return nil

LeStorageTests/ApiCallTests.swift

@@ -0,0 +1,85 @@
+//
+//  ApiCallTests.swift
+//  LeStorageTests
+//
+//  Created by Laurent Morvillier on 15/02/2025.
+//
+
+import Testing
+@testable import LeStorage
+
+class Thing: ModelObject, Storable {
+    static func resourceName() -> String { return "thing" }
+    static func tokenExemptedMethods() -> [LeStorage.HTTPMethod] { return [] }
+    static func filterByStoreIdentifier() -> Bool { return false }
+    
+    var id: String = Store.randomId()
+    var name: String
+    
+    init(name: String) {
+        self.name = name
+    }
+}
+
+struct ApiCallTests {
+
+    @Test func testApiCallProvisioning1() async throws {
+        let collection = ApiCallCollection<Thing>()
+        
+        let thing = Thing(name: "yeah")
+        
+        let _ = try await collection.sendInsertion(thing)
+        
+        await #expect(collection.items.count == 1)
+        if let apiCall = await collection.items.first {
+            #expect(apiCall.method == .post)
+        }
+        
+        thing.name = "woo"
+        let _ = try await collection.sendUpdate(thing)
+        await #expect(collection.items.count == 1)
+        if let apiCall = await collection.items.first {
+            #expect(apiCall.method == .post)
+        }
+        
+        let _ = try await collection.sendDeletion(thing)
+        await #expect(collection.items.count == 0)
+    }
+
+    @Test func testApiCallProvisioning2() async throws {
+        let collection = ApiCallCollection<Thing>()
+        
+        let thing = Thing(name: "yeah")
+        
+        let _ = try await collection.sendUpdate(thing)
+        
+        await #expect(collection.items.count == 1)
+        if let apiCall = await collection.items.first {
+            #expect(apiCall.method == .put)
+        }
+        
+        thing.name = "woo"
+        let _ = try await collection.sendUpdate(thing)
+        await #expect(collection.items.count == 1)
+        if let apiCall = await collection.items.first {
+            #expect(apiCall.method == .put)
+        }
+        
+        let _ = try await collection.sendDeletion(thing)
+        await #expect(collection.items.count == 1)
+    }
+
+    @Test func testApiCallProvisioning3() async throws {
+        let collection = ApiCallCollection<Thing>()
+        
+        let thing = Thing(name: "yeah")
+        
+        let _ = try await collection.sendDeletion(thing)
+        await #expect(collection.items.count == 1)
+        let _ = try await collection.sendDeletion(thing)
+        await #expect(collection.items.count == 1)
+        let _ = try await collection.sendDeletion(thing)
+        await #expect(collection.items.count == 1)
+    }
+
+}