Repository pattern in Swift

Transcript

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4. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository query model params JSON NSPredicate RealmObject

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   4XJGU protocol RecipeRepository { func find(id: UInt) -> Recipe? func

   findAll(query: Query, sort: Sort) -> [Recipe] func save(recipes: [Recipe]) -> Recipe? func delete(recipes: [Recipe]) -> Recipe? }

6. JO
   4XJGU class MemoryRecipeRepository: RecipeRepository { let recipes = [ Recipe(id:

   1, name: “…”), Recipe(id: 2, name: “…”), Recipe(id: 3, name: “…”), ] func find(id: UInt) -> Recipe? { recipes.filter { $0.id == id }.first } }

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9. 1SPNJTF protocol RecipeRepository { func find(id: UInt) -> Task<Void, Recipe,

   ErrorType> func findAll(query: Query, sort: Sort) -> Task<Void, [Recipe], ErrorType> func save(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> func delete(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> }

10. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository query model params JSON NSPredicate RealmObject

11. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> params JSON NSPredicate

    RealmObject query

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13. OBPUZ"OZ2VFSZ let query = AnyQuery.Equal(key: “name”, value: “naoty”) query.predicate //=>

    NSPredicate(format: "name == ‘naoty’") query.dictionary //=> ["name": “naoty”] let sort = AnySort.Ascending(key: “id”) sort.sortDescriptors //=> [NSSortDescriptor(key: "id", ascending: true)] sort.dictionary //=> ["sort": ["id"]]

14. OBPUZ"OZ2VFSZ protocol RecipeRepository { func find(id: UInt) -> Task<Void, Recipe,

    ErrorType> func findAll(query: AnyQuery, sort: AnySort) -> Task<Void, [Recipe], ErrorType> func save(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> func delete(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> }

15. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> params JSON NSPredicate

    RealmObject query

16. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON

    NSPredicate RealmObject AnyQuery

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18. ͜Ε͸Ͱ͖ͳ͍ protocol Repository { associatedtype Domain func find(id: Uint) ->

    Task<Void, Domain, ErrorType> } let repository: Repository = MemoryRecipeRepository()

19. ܕফڈ struct AnyRepository<DomainType>: Repository { let _find: (id: UInt) ->

    Task<Void, DomainType, ErrorType> init<T: Repository where T.Domain == DomainType>(_ repository: T) { _find = repository.find } func find(id: UInt) -> Task<Void, DomainType, ErrorType> { return _find(id) } } let repository = AnyRepository(MemoryRecipeRepository()) // repository: AnyRepository<Recipe>

20. ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON

    NSPredicate RealmObject AnyQuery

21. ViewController AnyRepository<Recipe> WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON

    NSPredicate RealmObject AnyQuery

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