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use Query with TCA #5

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use Query with TCA #5

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1 change: 1 addition & 0 deletions SwiftDataTCA/SwiftDataTCAApp.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@ struct SwiftDataTCAApp: App {
TCAContentView.Feature()
._printChanges()
}))
.modelContext(self.modelContext)
.tabItem {
Label("TCAContentView", systemImage: "1.circle")
}
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91 changes: 48 additions & 43 deletions SwiftDataTCA/View/ContentView.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,24 @@ struct TCAContentView: View {
let titleSort: TCAContentView.Feature.State.TitleSort?
let uuidSort: TCAContentView.Feature.State.UUIDSort?

var fetchDescriptor: FetchDescriptor<Movie> {
return .init(predicate: self.predicate, sortBy: self.sort)
}
private var predicate: Predicate<Movie> {
guard !searchString.isEmpty else { return #Predicate<Movie> { _ in true } }

return #Predicate {
$0.title.localizedStandardContains(searchString)

}
}
private var sort: [SortDescriptor<Movie>] {
return [
self.titleSort?.descriptor,
self.uuidSort?.descriptor
].compactMap { $0 }
}

init(_ state: Feature.State) {
self.movies = state.movies
self.searchString = state.searchString
Expand All @@ -30,6 +48,10 @@ struct TCAContentView: View {
var body: some View {
WithViewStore(store, observe: ViewState.init) { viewStore in
NavigationStack {
TCAContentDataView(fetchDescriptor: viewStore.fetchDescriptor) { movies in
viewStore.send(.onMoviesChange(movies), animation: .default)
}

Menu("Sort", systemImage: "arrow.up.arrow.down") {
Picker("Title", selection: viewStore.binding(get: \.titleSort, send: { .titleSortChanged($0) }).animation()) {
Text("A -> Z").tag(TCAContentView_TitleSort?.some(.forward))
Expand Down Expand Up @@ -87,9 +109,6 @@ struct TCAContentView: View {
}
}
}
.onAppear {
store.send(.onAppear)
}
}
}

Expand All @@ -113,28 +132,31 @@ struct TCAContentView: View {
typealias TCAContentView_TitleSort = TCAContentView.Feature.State.TitleSort
typealias TCAContentView_UUIDSort = TCAContentView.Feature.State.UUIDSort

struct TCAContentDataView: View {
@Query var moviesQuery: [Movie]
let onMoviesChange: ([Movie]) -> Void

init(
fetchDescriptor: FetchDescriptor<Movie>,
onMoviesChange: @escaping ([Movie]) -> Void
) {
_moviesQuery = Query(fetchDescriptor)
self.onMoviesChange = onMoviesChange
}

var body: some View {
VStack { }
.onChange(of: moviesQuery, initial: true) { oldValue, newValue in
onMoviesChange(newValue)
}
}
}

extension TCAContentView {
struct Feature: Reducer {
struct State: Equatable {
var movies: [Movie] = []
var searchString: String = ""
var fetchDescriptor: FetchDescriptor<Movie> {
return .init(predicate: self.predicate, sortBy: self.sort)
}
var predicate: Predicate<Movie> {
guard !searchString.isEmpty else { return #Predicate<Movie> { _ in true } }

return #Predicate {
$0.title.localizedStandardContains(searchString)

}
}
var sort: [SortDescriptor<Movie>] {
return [
self.titleSort?.descriptor,
self.uuidSort?.descriptor
].compactMap { $0 }
}
var titleSort: TitleSort?
public enum TitleSort {
case forward, reverse
Expand All @@ -157,18 +179,10 @@ extension TCAContentView {
}
}
}


mutating func refetchMovies() {
@Dependency(\.swiftData) var context
do {
self.movies = try context.fetch(self.fetchDescriptor)
} catch {}
}
}

enum Action: Equatable {
case onAppear
case onMoviesChange([Movie])

case add
case delete(Movie)
Expand All @@ -186,27 +200,23 @@ extension TCAContentView {
var body: some Reducer<State, Action> {
Reduce { state, action in
switch action {
case .onAppear:
state.refetchMovies()
case .onMoviesChange(let movies):
state.movies = movies
return .none
case .add:
do {
let randomMovieName = ["Star Wars", "Harry Potter", "Hunger Games", "Lord of the Rings"].randomElement()!
try context.add(.init(title: randomMovieName, cast: ["Sam Worthington", "Zoe Saldaña", "Stephen Lang", "Michelle Rodriguez"]))
} catch { }
return .run { @MainActor send in
send(.onAppear, animation: .default)
}
return .none
case .delete(let movie):
do {
try context.delete(movie)
} catch {

}

return .run { @MainActor send in
send(.onAppear, animation: .default)
}
return .none
case .favorite(let movie):
movie.favorite.toggle()

Expand All @@ -218,21 +228,16 @@ extension TCAContentView {
// state.refetchMovies()

// Not sure why but animation doesn't appear to work unless I .run another action
return .run { @MainActor send in
send(.onAppear, animation: .default)
}
return .none
case .titleSortChanged(let newSort):
state.titleSort = newSort
state.refetchMovies()
return .none
case .uuidSortChanged(let newSort):
state.uuidSort = newSort
state.refetchMovies()
return .none
case .clearAllSorting:
state.uuidSort = nil
state.titleSort = nil
state.refetchMovies()
return .none
}
}
Expand Down