5 // Created by Hori,Masaki on 2017/02/22.
6 // Copyright © 2017年 Hori,Masaki. All rights reserved.
13 struct MappingConfiguration<T: NSManagedObject> {
16 let dataKeys: [String]
17 let primaryKeys: [String]
18 let editorStore: CoreDataAccessor
19 let ignoreKeys: [String]
21 init(entity: Entity<T>,
22 dataKeys: [String] = ["api_data"],
23 primaryKeys: [String] = ["id"],
24 editorStore: CoreDataAccessor,
25 ignoreKeys: [String] = []) {
28 self.dataKeys = dataKeys
29 self.primaryKeys = primaryKeys
30 self.editorStore = editorStore
31 self.ignoreKeys = ignoreKeys
37 associatedtype ObjectType: NSManagedObject
39 init(_ apiResponse: APIResponse)
41 var apiResponse: APIResponse { get }
42 var configuration: MappingConfiguration<ObjectType> { get }
44 func registerElement(_ element: JSON, to object: ObjectType)
46 func beginRegister(_ object: ObjectType)
47 func handleExtraValue(_ value: JSON, forKey key: String, to object: ObjectType) -> Bool
48 func finishOperating()
52 // delete api_ prefix.
53 func keyByDeletingPrefix() -> String {
55 if self.count < 5 { return self }
57 return String(self[index(startIndex, offsetBy: 4)...])
61 extension JSONMapper {
63 var data: JSON { return apiResponse.json[configuration.dataKeys] }
65 private func isEqual(_ lhs: AnyObject?, _ rhs: AnyObject?) -> Bool {
67 if lhs == nil, rhs == nil { return true }
68 if let lhs = lhs, let rhs = rhs { return lhs.isEqual(rhs) }
73 func setValueIfNeeded(_ value: JSON, to object: ObjectType, forKey key: String) {
75 var validValue = value.object as AnyObject?
78 try object.validateValue(&validValue, forKey: key)
85 let old = object.value(forKey: key)
86 if !isEqual(old as AnyObject?, validValue) {
88 object.setValue(validValue, forKey: key)
92 func registerElement(_ element: JSON, to object: ObjectType) {
95 element.forEach { (key, value) in
97 if configuration.ignoreKeys.contains(key) { return }
98 if handleExtraValue(value, forKey: key, to: object) { return }
102 value.array?.enumerated().forEach {
104 let newKey = "\(key)_\($0.offset)"
105 setValueIfNeeded($0.element, to: object, forKey: newKey)
109 value.forEach { (subKey: String, subValue) in
111 let newKey = "\(key)_D_\(subKey.keyByDeletingPrefix())"
112 setValueIfNeeded(subValue, to: object, forKey: newKey)
116 setValueIfNeeded(value, to: object, forKey: key)
121 private var sortDescriptors: [NSSortDescriptor] {
123 return configuration.primaryKeys.map { NSSortDescriptor(key: $0, ascending: true) }
126 private func objectSearch(_ objects: [ObjectType], _ element: JSON) -> ObjectType? {
128 let keyPiar = configuration.primaryKeys.map { (key: $0, apiKey: "api_\($0)") }
130 return objects.binarySearch {
132 // TODO: replace to forEach
133 for piar in keyPiar {
135 guard let v1 = $0.value(forKey: piar.key) else { return .orderedAscending }
137 if element[piar.apiKey].type == .null { return .orderedDescending }
139 let v2 = element[piar.apiKey].object
141 return (v1 as AnyObject).compare(v2)
144 return .orderedDescending
148 private func sortedObjects<T>(_ entity: Entity<T>) -> [T] {
150 let store = configuration.editorStore
152 guard let objects = try? store.objects(of: configuration.entity) else {
154 Logger.shared.log("Can not get entity named \(configuration.entity)")
158 return (objects as NSArray).sortedArray(using: sortDescriptors) as? [T] ?? []
160 private func commintInContext() {
162 let store = configuration.editorStore
163 let objects = sortedObjects(configuration.entity)
165 let list = (data.type == .array ? data.arrayValue : [data])
168 if let object = objectSearch(objects, $0) {
170 registerElement($0, to: object)
172 } else if let new = store.insertNewObject(for: configuration.entity) {
174 registerElement($0, to: new)
178 fatalError("Can not get entity named \(configuration.entity)")
188 configuration.editorStore
190 self.commintInContext()
194 func beginRegister(_ object: ObjectType) {}
196 func handleExtraValue(_ value: JSON, forKey key: String, to object: ObjectType) -> Bool {
201 func finishOperating() {}