feat: implement support for projects, lists, and pastes

4 files changed, 791 insertions, 0 deletions

diff --git a/Hutch/Views/Pastes/PasteDetailView.swift b/Hutch/Views/Pastes/PasteDetailView.swift
new file mode 100644
index 0000000..df3a8be
--- /dev/null
+++ b/Hutch/Views/Pastes/PasteDetailView.swift
@@ -0,0 +1,288 @@
+import SwiftUI
+
+struct PasteDetailView: View {
+    let paste: Paste
+    var onUpdated: ((Paste) -> Void)? = nil
+    var onDeleted: ((String) -> Void)? = nil
+
+    @Environment(AppState.self) private var appState
+    @Environment(\.dismiss) private var dismiss
+    @State private var viewModel: PasteDetailViewModel?
+    @State private var showVisibilitySheet = false
+    @State private var showDeleteConfirmation = false
+
+    var body: some View {
+        Group {
+            if let viewModel {
+                content(viewModel)
+            } else {
+                SRHTLoadingStateView(message: "Loading paste…")
+            }
+        }
+        .navigationTitle(displayTitle)
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            ToolbarItemGroup(placement: .topBarTrailing) {
+                SRHTShareButton(
+                    url: currentPaste.flatMap { SRHTWebURL.paste(ownerCanonicalName: $0.user.canonicalName, pasteId: $0.id) },
+                    target: .paste
+                ) {
+                    Image(systemName: "square.and.arrow.up")
+                }
+
+                if viewModel != nil {
+                    Menu {
+                        Button {
+                            showVisibilitySheet = true
+                        } label: {
+                            Label("Change Visibility", systemImage: "eye")
+                        }
+
+                        Button(role: .destructive) {
+                            showDeleteConfirmation = true
+                        } label: {
+                            Label("Delete Paste", systemImage: "trash")
+                        }
+                    } label: {
+                        Image(systemName: "ellipsis.circle")
+                    }
+                }
+            }
+        }
+        .sheet(isPresented: $showVisibilitySheet) {
+            if let viewModel, let currentPaste {
+                PasteVisibilitySheet(
+                    currentVisibility: currentPaste.visibility,
+                    isUpdating: viewModel.isUpdatingVisibility
+                ) { visibility in
+                    if let updated = await viewModel.updateVisibility(visibility) {
+                        onUpdated?(updated)
+                        showVisibilitySheet = false
+                    }
+                }
+            }
+        }
+        .alert("Delete Paste?", isPresented: $showDeleteConfirmation) {
+            Button("Cancel", role: .cancel) {}
+            Button("Delete", role: .destructive) {
+                Task {
+                    if await viewModel?.deletePaste() == true {
+                        onDeleted?(paste.id)
+                        dismiss()
+                    }
+                }
+            }
+        } message: {
+            Text("This paste will be permanently removed.")
+        }
+        .task {
+            if viewModel == nil {
+                let vm = PasteDetailViewModel(
+                    pasteID: paste.id,
+                    initialPaste: paste,
+                    service: PasteService(client: appState.client)
+                )
+                viewModel = vm
+                await vm.loadPaste()
+            }
+        }
+    }
+
+    private var currentPaste: Paste? {
+        viewModel?.paste ?? paste
+    }
+
+    private var displayTitle: String {
+        if let filename = currentPaste?.files.first?.filename, !filename.isEmpty {
+            return filename
+        }
+        return "Paste \(paste.id)"
+    }
+
+    @ViewBuilder
+    private func content(_ viewModel: PasteDetailViewModel) -> some View {
+        @Bindable var vm = viewModel
+
+        if viewModel.isLoading, viewModel.paste == nil {
+            SRHTLoadingStateView(message: "Loading paste…")
+        } else if let error = viewModel.error, viewModel.paste == nil {
+            SRHTErrorStateView(
+                title: "Couldn't Load Paste",
+                message: error,
+                retryAction: { await viewModel.loadPaste() }
+            )
+        } else if let paste = viewModel.paste {
+            List {
+                Section("Details") {
+                    LabeledContent("ID", value: paste.id)
+                    LabeledContent("Owner", value: paste.user.canonicalName)
+                    LabeledContent("Created", value: paste.created.relativeDescription)
+                    LabeledContent("Visibility", value: visibilityLabel(paste.visibility))
+                    LabeledContent("Files", value: "\(paste.files.count)")
+                }
+
+                if paste.files.count > 1 {
+                    Section("Files") {
+                        Picker("Selected File", selection: Binding(
+                            get: { viewModel.selectedFileHash ?? paste.files.first?.hash ?? "" },
+                            set: { viewModel.selectFile(hash: $0) }
+                        )) {
+                            ForEach(paste.files) { file in
+                                Text(file.filename ?? String(file.hash.prefix(8)))
+                                    .tag(file.hash)
+                            }
+                        }
+                    }
+                }
+
+                if let file = viewModel.selectedFile {
+                    Section("Current File") {
+                        if let filename = file.filename, !filename.isEmpty {
+                            LabeledContent("Filename", value: filename)
+                        }
+                        LabeledContent("Hash", value: file.hash)
+                    }
+
+                    Section {
+                        if viewModel.loadingFileHashes.contains(file.hash) && viewModel.selectedFileContents == nil {
+                            SRHTLoadingStateView(message: "Loading paste contents…")
+                                .frame(minHeight: 180)
+                        } else if let contents = viewModel.selectedFileContents {
+                            PasteCodeBlock(text: contents)
+                        } else {
+                            Text("This file’s contents are unavailable.")
+                                .foregroundStyle(.secondary)
+                        }
+                    } header: {
+                        Text("Contents")
+                    }
+                }
+            }
+            .listStyle(.insetGrouped)
+            .srhtErrorBanner(error: $vm.error)
+            .refreshable {
+                await viewModel.loadPaste()
+            }
+        }
+    }
+
+    private func visibilityLabel(_ visibility: Visibility) -> String {
+        switch visibility {
+        case .public:
+            return "Public"
+        case .unlisted:
+            return "Unlisted"
+        case .private:
+            return "Private"
+        }
+    }
+}
+
+private struct PasteCodeBlock: View {
+    let text: String
+
+    var body: some View {
+        ScrollView([.horizontal, .vertical], showsIndicators: true) {
+            Text(text.isEmpty ? " " : text)
+                .font(.system(.body, design: .monospaced))
+                .textSelection(.enabled)
+                .frame(maxWidth: .infinity, alignment: .leading)
+                .padding(.vertical, 4)
+        }
+        .frame(minHeight: 220)
+    }
+}
+
+private struct PasteVisibilitySheet: View {
+    let currentVisibility: Visibility
+    let isUpdating: Bool
+    let onSave: (Visibility) async -> Void
+
+    @Environment(\.dismiss) private var dismiss
+    @State private var visibility: Visibility
+
+    init(currentVisibility: Visibility, isUpdating: Bool, onSave: @escaping (Visibility) async -> Void) {
+        self.currentVisibility = currentVisibility
+        self.isUpdating = isUpdating
+        self.onSave = onSave
+        _visibility = State(initialValue: currentVisibility)
+    }
+
+    var body: some View {
+        NavigationStack {
+            List {
+                ForEach(visibilityOptions, id: \.self) { option in
+                    Button {
+                        visibility = option
+                    } label: {
+                        HStack {
+                            VStack(alignment: .leading, spacing: 2) {
+                                Text(title(for: option))
+                                    .foregroundStyle(.primary)
+                                Text(description(for: option))
+                                    .font(.caption)
+                                    .foregroundStyle(.secondary)
+                            }
+
+                            Spacer()
+
+                            if visibility == option {
+                                Image(systemName: "checkmark")
+                                    .foregroundStyle(.tint)
+                            }
+                        }
+                        .contentShape(Rectangle())
+                    }
+                    .buttonStyle(.plain)
+                }
+            }
+            .listStyle(.insetGrouped)
+            .navigationTitle("Visibility")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button("Save") {
+                        Task {
+                            await onSave(visibility)
+                        }
+                    }
+                    .disabled(isUpdating || visibility == currentVisibility)
+                }
+            }
+            .overlay {
+                if isUpdating {
+                    ProgressView()
+                }
+            }
+        }
+    }
+
+    private var visibilityOptions: [Visibility] {
+        [.public, .unlisted, .private]
+    }
+
+    private func title(for visibility: Visibility) -> String {
+        switch visibility {
+        case .public:
+            "Public"
+        case .unlisted:
+            "Unlisted"
+        case .private:
+            "Private"
+        }
+    }
+
+    private func description(for visibility: Visibility) -> String {
+        switch visibility {
+        case .public:
+            "Visible to everyone and listed on your profile."
+        case .unlisted:
+            "Visible to anyone with the URL, but not listed on your profile."
+        case .private:
+            "Visible only to explicitly allowed viewers."
+        }
+    }
+}
diff --git a/Hutch/Views/Pastes/PasteDetailViewModel.swift b/Hutch/Views/Pastes/PasteDetailViewModel.swift
new file mode 100644
index 0000000..8c60edd
--- /dev/null
+++ b/Hutch/Views/Pastes/PasteDetailViewModel.swift
@@ -0,0 +1,114 @@
+import Foundation
+
+@Observable
+@MainActor
+final class PasteDetailViewModel {
+    private(set) var paste: Paste?
+    private(set) var isLoading = false
+    private(set) var isUpdatingVisibility = false
+    private(set) var isDeleting = false
+    private(set) var loadingFileHashes: Set<String> = []
+    var error: String?
+
+    var selectedFileHash: String?
+    private(set) var fileContents: [String: String] = [:]
+
+    private let pasteID: String
+    private let service: PasteService
+
+    init(pasteID: String, initialPaste: Paste? = nil, service: PasteService) {
+        self.pasteID = pasteID
+        self.paste = initialPaste
+        self.service = service
+        self.selectedFileHash = initialPaste?.files.first?.hash
+    }
+
+    var selectedFile: PasteFile? {
+        let hash = selectedFileHash ?? paste?.files.first?.hash
+        return paste?.files.first(where: { $0.hash == hash })
+    }
+
+    var selectedFileContents: String? {
+        guard let selectedFile else { return nil }
+        return fileContents[selectedFile.hash]
+    }
+
+    func loadPaste() async {
+        guard !isLoading else { return }
+        isLoading = true
+        error = nil
+        defer { isLoading = false }
+
+        do {
+            let loaded = try await service.loadPaste(id: pasteID)
+            paste = loaded
+            if selectedFileHash == nil {
+                selectedFileHash = loaded?.files.first?.hash
+            }
+            await loadSelectedFileContentsIfNeeded()
+        } catch {
+            self.error = error.localizedDescription
+        }
+    }
+
+    func selectFile(hash: String) {
+        selectedFileHash = hash
+        Task {
+            await loadSelectedFileContentsIfNeeded()
+        }
+    }
+
+    func updateVisibility(_ visibility: Visibility) async -> Paste? {
+        guard !isUpdatingVisibility else { return nil }
+        guard let paste else { return nil }
+        guard paste.visibility != visibility else { return paste }
+
+        isUpdatingVisibility = true
+        error = nil
+        defer { isUpdatingVisibility = false }
+
+        do {
+            let updatedPaste = try await service.updateVisibility(id: paste.id, visibility: visibility)
+            if let updatedPaste {
+                self.paste = updatedPaste
+                if selectedFileHash == nil {
+                    selectedFileHash = updatedPaste.files.first?.hash
+                }
+            }
+            return updatedPaste
+        } catch {
+            self.error = error.localizedDescription
+            return nil
+        }
+    }
+
+    func deletePaste() async -> Bool {
+        guard !isDeleting else { return false }
+        isDeleting = true
+        error = nil
+        defer { isDeleting = false }
+
+        do {
+            _ = try await service.deletePaste(id: pasteID)
+            return true
+        } catch {
+            self.error = error.localizedDescription
+            return false
+        }
+    }
+
+    func loadSelectedFileContentsIfNeeded() async {
+        guard let file = selectedFile, fileContents[file.hash] == nil else { return }
+        guard let url = file.contents else { return }
+        guard !loadingFileHashes.contains(file.hash) else { return }
+
+        loadingFileHashes.insert(file.hash)
+        defer { loadingFileHashes.remove(file.hash) }
+
+        do {
+            fileContents[file.hash] = try await service.loadContents(from: url)
+        } catch {
+            self.error = error.localizedDescription
+        }
+    }
+}
diff --git a/Hutch/Views/Pastes/PasteListView.swift b/Hutch/Views/Pastes/PasteListView.swift
new file mode 100644
index 0000000..9d8c0d4
--- /dev/null
+++ b/Hutch/Views/Pastes/PasteListView.swift
@@ -0,0 +1,280 @@
+import SwiftUI
+
+struct PasteListView: View {
+    @Environment(AppState.self) private var appState
+    @State private var viewModel: PasteListViewModel?
+    @State private var showCreatePasteSheet = false
+    @State private var createdPaste: Paste?
+
+    var body: some View {
+        Group {
+            if let viewModel {
+                content(viewModel)
+            } else {
+                SRHTLoadingStateView(message: "Loading pastes…")
+            }
+        }
+        .navigationTitle("Pastes")
+        .toolbar {
+            if viewModel != nil {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Button {
+                        showCreatePasteSheet = true
+                    } label: {
+                        Image(systemName: "plus")
+                    }
+                }
+            }
+        }
+        .sheet(isPresented: $showCreatePasteSheet) {
+            if let viewModel {
+                CreatePasteSheet(viewModel: viewModel) { paste in
+                    showCreatePasteSheet = false
+                    createdPaste = paste
+                }
+            }
+        }
+        .navigationDestination(isPresented: Binding(
+            get: { createdPaste != nil },
+            set: { isPresented in
+                if !isPresented {
+                    createdPaste = nil
+                }
+            }
+        )) {
+            if let createdPaste {
+                PasteDetailView(
+                    paste: createdPaste,
+                    onUpdated: { updated in
+                        viewModel?.upsertPaste(updated)
+                    },
+                    onDeleted: { id in
+                        viewModel?.removePaste(id: id)
+                    }
+                )
+            }
+        }
+        .task {
+            if viewModel == nil {
+                let vm = PasteListViewModel(service: PasteService(client: appState.client))
+                viewModel = vm
+                await vm.loadPastes()
+            }
+        }
+    }
+
+    @ViewBuilder
+    private func content(_ viewModel: PasteListViewModel) -> some View {
+        @Bindable var vm = viewModel
+
+        List {
+            ForEach(viewModel.pastes) { paste in
+                NavigationLink(value: paste) {
+                    PasteRowView(paste: paste)
+                }
+                .task {
+                    await viewModel.loadMoreIfNeeded(currentItem: paste)
+                }
+            }
+
+            if viewModel.isLoadingMore {
+                HStack {
+                    Spacer()
+                    ProgressView()
+                    Spacer()
+                }
+                .listRowSeparator(.hidden)
+            }
+        }
+        .listStyle(.plain)
+        .overlay {
+            if viewModel.isLoading, viewModel.pastes.isEmpty {
+                SRHTLoadingStateView(message: "Loading pastes…")
+            } else if let error = viewModel.error, viewModel.pastes.isEmpty {
+                SRHTErrorStateView(
+                    title: "Couldn't Load Pastes",
+                    message: error,
+                    retryAction: { await viewModel.loadPastes() }
+                )
+            } else if viewModel.pastes.isEmpty {
+                ContentUnavailableView(
+                    "No Pastes",
+                    systemImage: "doc.on.clipboard",
+                    description: Text("Your pastes will appear here.")
+                )
+            }
+        }
+        .connectivityOverlay(hasContent: !viewModel.pastes.isEmpty) {
+            await viewModel.loadPastes()
+        }
+        .srhtErrorBanner(error: $vm.error)
+        .refreshable {
+            await viewModel.loadPastes()
+        }
+        .navigationDestination(for: Paste.self) { paste in
+            PasteDetailView(
+                paste: paste,
+                onUpdated: { updated in
+                    viewModel.upsertPaste(updated)
+                },
+                onDeleted: { id in
+                    viewModel.removePaste(id: id)
+                }
+            )
+        }
+    }
+}
+
+private struct PasteRowView: View {
+    let paste: Paste
+
+    var body: some View {
+        HStack(alignment: .top, spacing: 12) {
+            Image(systemName: "doc.text")
+                .foregroundStyle(.secondary)
+                .frame(width: 20)
+
+            VStack(alignment: .leading, spacing: 4) {
+                Text(primaryTitle)
+                    .font(.subheadline.weight(.medium))
+                    .lineLimit(1)
+
+                Text(secondaryLine)
+                    .font(.caption)
+                    .foregroundStyle(.secondary)
+                    .lineLimit(2)
+
+                HStack(spacing: 8) {
+                    VisibilityBadge(visibility: paste.visibility)
+                    Text("•")
+                        .foregroundStyle(.tertiary)
+                    Text(paste.created.relativeDescription)
+                        .foregroundStyle(.tertiary)
+                }
+                .font(.caption2)
+            }
+        }
+        .padding(.vertical, 2)
+    }
+
+    private var primaryTitle: String {
+        if let filename = paste.files.first?.filename, !filename.isEmpty {
+            return filename
+        }
+        return paste.files.count > 1 ? "Untitled Paste (\(paste.files.count) files)" : "Untitled Paste"
+    }
+
+    private var secondaryLine: String {
+        var parts: [String] = [paste.user.canonicalName]
+        if paste.files.count > 1 {
+            parts.append("\(paste.files.count) files")
+        } else {
+            parts.append("1 file")
+        }
+        if let firstHash = paste.files.first?.hash {
+            parts.append(String(firstHash.prefix(8)))
+        }
+        return parts.joined(separator: " • ")
+    }
+}
+
+private struct CreatePasteSheet: View {
+    let viewModel: PasteListViewModel
+    let onCreated: (Paste) -> Void
+
+    @Environment(\.dismiss) private var dismiss
+    @State private var files = [PasteUploadDraft()]
+    @State private var visibility: Visibility = .unlisted
+
+    var body: some View {
+        NavigationStack {
+            Form {
+                Section("Files") {
+                    ForEach($files) { $file in
+                        VStack(alignment: .leading, spacing: 8) {
+                            TextField("Filename (optional)", text: $file.filename)
+                                .autocorrectionDisabled()
+                                .textInputAutocapitalization(.never)
+
+                            ZStack(alignment: .topLeading) {
+                                if file.contents.isEmpty {
+                                    Text("Paste contents")
+                                        .foregroundStyle(.tertiary)
+                                        .padding(.top, 8)
+                                        .padding(.leading, 5)
+                                        .allowsHitTesting(false)
+                                }
+
+                                TextEditor(text: $file.contents)
+                                    .font(.system(.body, design: .monospaced))
+                                    .frame(minHeight: 180)
+                            }
+                        }
+                        .padding(.vertical, 4)
+                    }
+                    .onDelete { offsets in
+                        files.remove(atOffsets: offsets)
+                        if files.isEmpty {
+                            files = [PasteUploadDraft()]
+                        }
+                    }
+
+                    Button {
+                        files.append(PasteUploadDraft())
+                    } label: {
+                        Label("Add File", systemImage: "plus")
+                    }
+                }
+
+                Section("Visibility") {
+                    Picker("Visibility", selection: $visibility) {
+                        Text("Public").tag(Visibility.public)
+                        Text("Unlisted").tag(Visibility.unlisted)
+                        Text("Private").tag(Visibility.private)
+                    }
+                }
+
+                Section {
+                    Text("Paste contents are uploaded as UTF-8 text files. Hutch can change visibility later, but the API does not support editing file contents after creation.")
+                        .font(.footnote)
+                        .foregroundStyle(.secondary)
+                }
+
+                if let error = viewModel.error {
+                    Section {
+                        Label(error, systemImage: "exclamationmark.triangle.fill")
+                            .foregroundStyle(.red)
+                    }
+                }
+            }
+            .navigationTitle("New Paste")
+            .navigationBarTitleDisplayMode(.inline)
+            .toolbar {
+                ToolbarItem(placement: .cancellationAction) {
+                    Button("Cancel") { dismiss() }
+                }
+                ToolbarItem(placement: .confirmationAction) {
+                    Button {
+                        Task {
+                            if let paste = await viewModel.createPaste(files: files, visibility: visibility) {
+                                onCreated(paste)
+                            }
+                        }
+                    } label: {
+                        if viewModel.isCreatingPaste {
+                            ProgressView()
+                                .controlSize(.small)
+                        } else {
+                            Text("Create Paste")
+                        }
+                    }
+                    .disabled(!hasValidContent || viewModel.isCreatingPaste)
+                }
+            }
+        }
+    }
+
+    private var hasValidContent: Bool {
+        files.contains { !$0.contents.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }
+    }
+}
diff --git a/Hutch/Views/Pastes/PasteListViewModel.swift b/Hutch/Views/Pastes/PasteListViewModel.swift
new file mode 100644
index 0000000..ee7d47a
--- /dev/null
+++ b/Hutch/Views/Pastes/PasteListViewModel.swift
@@ -0,0 +1,109 @@
+import Foundation
+
+@Observable
+@MainActor
+final class PasteListViewModel {
+    private(set) var pastes: [Paste] = []
+    private(set) var isLoading = false
+    private(set) var isLoadingMore = false
+    private(set) var isRefreshing = false
+    private(set) var isCreatingPaste = false
+    var error: String?
+
+    private var cursor: String?
+    private var hasMore = true
+    private let service: PasteService
+
+    init(service: PasteService) {
+        self.service = service
+    }
+
+    func loadPastes() async {
+        if pastes.isEmpty, let cached = service.loadCachedPastes() {
+            pastes = cached.results
+            cursor = cached.cursor
+            hasMore = cached.cursor != nil
+        }
+
+        if pastes.isEmpty {
+            isLoading = true
+        } else {
+            isRefreshing = true
+        }
+        error = nil
+        cursor = nil
+        hasMore = true
+
+        do {
+            let page = try await service.listPastes(cursor: nil, useCache: true)
+            pastes = page.results
+            cursor = page.cursor
+            hasMore = page.cursor != nil
+        } catch {
+            if pastes.isEmpty {
+                self.error = error.localizedDescription
+            }
+        }
+
+        isLoading = false
+        isRefreshing = false
+    }
+
+    func loadMoreIfNeeded(currentItem: Paste) async {
+        guard let last = pastes.last,
+              last.id == currentItem.id,
+              hasMore,
+              !isLoadingMore else {
+            return
+        }
+
+        isLoadingMore = true
+        defer { isLoadingMore = false }
+
+        do {
+            let page = try await service.listPastes(cursor: cursor, useCache: false)
+            pastes.append(contentsOf: page.results)
+            cursor = page.cursor
+            hasMore = page.cursor != nil
+        } catch {
+            self.error = error.localizedDescription
+        }
+    }
+
+    func createPaste(files: [PasteUploadDraft], visibility: Visibility) async -> Paste? {
+        guard !isCreatingPaste else { return nil }
+
+        let normalizedFiles = files.filter {
+            !$0.contents.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
+        }
+        guard !normalizedFiles.isEmpty else {
+            error = "Add at least one file with text content."
+            return nil
+        }
+
+        isCreatingPaste = true
+        error = nil
+        defer { isCreatingPaste = false }
+
+        do {
+            let paste = try await service.createPaste(files: normalizedFiles, visibility: visibility)
+            upsertPaste(paste)
+            return paste
+        } catch {
+            self.error = error.localizedDescription
+            return nil
+        }
+    }
+
+    func upsertPaste(_ paste: Paste) {
+        if let index = pastes.firstIndex(where: { $0.id == paste.id }) {
+            pastes[index] = paste
+        } else {
+            pastes.insert(paste, at: 0)
+        }
+    }
+
+    func removePaste(id: String) {
+        pastes.removeAll { $0.id == id }
+    }
+}