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import SwiftUI
@Observable
@MainActor
final class DiscoverProjectsViewModel {
private(set) var projects: [DiscoveredProject] = []
private(set) var isLoading = false
private(set) var isLoadingMore = false
var error: String?
private var cursor: String?
private var canLoadMore = true
private let service: ProjectService
init(service: ProjectService) {
self.service = service
}
func loadInitial() async {
guard projects.isEmpty, !isLoading else { return }
isLoading = true
error = nil
defer { isLoading = false }
do {
let page = try await service.fetchPublicProjects(cursor: nil)
projects = page.projects
cursor = page.cursor
canLoadMore = page.cursor != nil
} catch {
self.error = error.userFacingMessage
}
}
func reload() async {
cursor = nil
canLoadMore = true
projects = []
await loadInitial()
}
func loadMoreIfNeeded(current item: DiscoveredProject) async {
guard canLoadMore, !isLoadingMore, !isLoading else { return }
guard let index = projects.firstIndex(of: item), index >= projects.count - 3 else { return }
isLoadingMore = true
defer { isLoadingMore = false }
do {
let page = try await service.fetchPublicProjects(cursor: cursor)
let existing = Set(projects.map(\.id))
projects.append(contentsOf: page.projects.filter { !existing.contains($0.id) })
cursor = page.cursor
canLoadMore = page.cursor != nil
} catch {
self.error = error.userFacingMessage
}
}
}
struct DiscoverProjectsView: View {
@Environment(AppState.self) private var appState
@State private var viewModel: DiscoverProjectsViewModel?
var body: some View {
Group {
if let viewModel {
content(viewModel)
} else {
SRHTLoadingStateView(message: "Loading projects…")
}
}
.navigationTitle("Discover")
.navigationBarTitleDisplayMode(.inline)
.task {
if viewModel == nil {
let vm = DiscoverProjectsViewModel(service: ProjectService(client: appState.client))
viewModel = vm
await vm.loadInitial()
}
}
}
@ViewBuilder
private func content(_ viewModel: DiscoverProjectsViewModel) -> some View {
List {
ForEach(viewModel.projects) { discovered in
NavigationLink {
ProjectDetailView(
project: discovered.project,
canManage: discovered.ownerCanonicalName == appState.currentUser?.canonicalName
)
} label: {
DiscoveredProjectRow(discovered: discovered)
}
.buttonStyle(.plain)
.task {
await viewModel.loadMoreIfNeeded(current: discovered)
}
}
.themedRow()
if viewModel.isLoadingMore {
HStack {
Spacer()
ProgressView()
Spacer()
}
.listRowSeparator(.hidden)
.themedRow()
}
}
.themedList()
.listStyle(.plain)
.overlay {
if viewModel.isLoading, viewModel.projects.isEmpty {
SRHTLoadingStateView(message: "Loading projects…")
} else if let error = viewModel.error, viewModel.projects.isEmpty {
SRHTErrorStateView(
title: "Couldn't Load Projects",
message: error,
retryAction: { await viewModel.reload() }
)
} else if viewModel.projects.isEmpty {
ContentUnavailableView(
"No Public Projects",
systemImage: "sparkle.magnifyingglass",
description: Text("Public projects on SourceHut will appear here.")
)
}
}
.srhtErrorBanner(
error: Binding(
get: { viewModel.error },
set: { viewModel.error = $0 }
)
)
.refreshable {
await viewModel.reload()
}
}
}
private struct DiscoveredProjectRow: View {
let discovered: DiscoveredProject
private var project: Project { discovered.project }
var body: some View {
VStack(alignment: .leading, spacing: 4) {
Text(project.displayName)
.font(.headline)
.lineLimit(1)
Text(discovered.ownerCanonicalName)
.font(.caption)
.foregroundStyle(.secondary)
if let description = project.displayDescription {
Text(description)
.font(.subheadline)
.foregroundStyle(.secondary)
.lineLimit(2)
}
}
.padding(.vertical, 2)
}
}
|
