Repository pattern in Swift

potatotips #28

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? }
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   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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