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Create a common interface to provide persistent data storage, currently implemented one provider to store data in the `UserDefaults` for local persistence
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // | ||
| // LocalProvider.swift | ||
| // TodoAll | ||
| // | ||
| // Created by Franklin Cruz on 27-10-20. | ||
| // Copyright © 2020 S.Y.Soft. All rights reserved. | ||
| // | ||
|
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| import Foundation | ||
| import Combine | ||
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| class LocalProvider: Provider { | ||
| private static var storeNames = [ | ||
| Task.typeName: "tasks" | ||
| ] | ||
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| class func registerStoreName(forType type: Any.Type) { | ||
| storeNames[String(describing: type)] = String(describing: type) | ||
| } | ||
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| private func getAllData<T>() -> [T] where T : Identifiable & Codable { | ||
| let userDefaults = UserDefaults.standard | ||
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| guard let storeName = LocalProvider.storeNames[T.typeName] else { return [] } | ||
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| guard let data = userDefaults.data(forKey: storeName) else { return [] } | ||
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| let decoder = JSONDecoder() | ||
|
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| if let decoded = try? decoder.decode([T].self, from: data) { | ||
| return decoded | ||
| } | ||
|
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| return [] | ||
| } | ||
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| private func save<T>(data: [T]) where T : Identifiable & Codable { | ||
| let userDefaults = UserDefaults.standard | ||
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| guard let storeName = LocalProvider.storeNames[T.typeName] else { return } | ||
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| let encoder = JSONEncoder() | ||
| if let encoded = try? encoder.encode(data) { | ||
| userDefaults.set(encoded, forKey: storeName) | ||
| } | ||
| } | ||
|
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| func list<T>(filter: [String : Any]?, sort: [String : SortDirection]?) -> Future<[T], ServiceError> where T : Identifiable & Codable { | ||
| return Future { promise in | ||
| DispatchQueue.global(qos: .background).async { | ||
| promise(.success(self.getAllData())) | ||
| } | ||
| } | ||
| } | ||
|
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| func get<T>(byId id: T.ID) -> Future<T?, ServiceError> where T : Identifiable & Codable { | ||
| return Future { promise in | ||
| DispatchQueue.global(qos: .background).async { | ||
| let data: T? = self.getAllData().first(where: { $0.id == id }) | ||
| promise(.success(data)) | ||
| } | ||
| } | ||
| } | ||
|
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| func create<T>(_ element: T) -> Future<T?, ServiceError> where T : Identifiable & Codable { | ||
| return Future { promise in | ||
| DispatchQueue.global(qos: .background).async { | ||
| var all: [T] = self.getAllData() | ||
| all.append(element) | ||
| self.save(data: all) | ||
| promise(.success(element)) | ||
| } | ||
| } | ||
| } | ||
|
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| func update<T>(_ element: T) -> Future<T?, ServiceError> where T : Identifiable & Codable { | ||
| return Future { promise in | ||
| DispatchQueue.global(qos: .background).async { | ||
| var all: [T] = self.getAllData() | ||
| all.removeAll(where: {$0.id == element.id}) | ||
| all.append(element) | ||
| self.save(data: all) | ||
| promise(.success(element)) | ||
| } | ||
| } | ||
| } | ||
|
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| func delete<T>(byId id: T.ID) -> Future<T?, ServiceError> where T : Identifiable & Codable { | ||
| return Future { promise in | ||
| DispatchQueue.global(qos: .background).async { | ||
| var all: [T] = self.getAllData() | ||
| let element = all.first(where: { $0.id == id}) | ||
| all.removeAll(where: {$0.id == id}) | ||
| self.save(data: all) | ||
| promise(.success(element)) | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| // | ||
| // Provider.swift | ||
| // TodoAll | ||
| // | ||
| // Created by Franklin Cruz on 27-10-20. | ||
| // Copyright © 2020 S.Y.Soft. All rights reserved. | ||
| // | ||
|
|
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| import Foundation | ||
| import Combine | ||
|
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| enum SortDirection { | ||
| case ascending | ||
| case descending | ||
| } | ||
|
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| protocol Provider { | ||
| func list<T>(filter: [String:Any]?, sort: [String: SortDirection]?) -> Future<[T], ServiceError> where T: Identifiable & Codable | ||
| func get<T>(byId id: T.ID) -> Future<T?, ServiceError> where T: Identifiable & Codable | ||
| func create<T>(_ element: T) -> Future<T?, ServiceError> where T: Identifiable & Codable | ||
| func update<T>(_ element: T) -> Future<T?, ServiceError> where T: Identifiable & Codable | ||
| func delete<T>(byId id: T.ID) -> Future<T?, ServiceError> where T: Identifiable & Codable | ||
| } | ||
|
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| extension Provider { | ||
| func list<T>(filter: [String:Any]? = nil, sort: [String: SortDirection]? = nil) -> Future<[T], ServiceError> where T: Identifiable & Codable { | ||
| return list(filter: filter, sort: sort) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| // | ||
| // Struct+TypeName.swift | ||
| // TodoAll | ||
| // | ||
| // Created by Franklin Cruz on 27-10-20. | ||
| // Copyright © 2020 S.Y.Soft. All rights reserved. | ||
| // | ||
|
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| import Foundation | ||
|
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| extension Identifiable { | ||
| static var typeName: String { | ||
| return String(describing: Self.self) | ||
| } | ||
| } |
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