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MBox Explorer - Complete Implementation Guide

This document provides complete implementation details for all remaining features.

✅ COMPLETED FEATURES

1. Progress Indicators ✅

  • Real-time progress bars during parsing/export
  • Cancellation support
  • Estimated time remaining
  • Files: ProgressView.swift, updated MboxParser.swift, ExportEngine.swift

2. Recent Files Menu ✅

  • File > Open Recent submenu
  • Stores last 10 files
  • Files: RecentFilesManager.swift, updated MBox_ExplorerApp.swift

3. Dark Mode Support ✅

  • Automatic system dark mode
  • Proper color adaptations
  • Files: Updated view files with proper colors

4. Status Messages ✅

  • Status bar at bottom
  • Loading overlays
  • Success/error messages
  • Files: Updated EmailListView.swift, MboxViewModel.swift

5. Enhanced Email Preview ✅

  • Show/hide quoted text toggle
  • Raw source view toggle
  • Selectable text
  • Files: Updated EmailDetailView.swift

🚀 READY TO IMPLEMENT - High Priority

6. Export Preview Dialog

Purpose: Show users what they're getting before exporting

File to Create: Views/ExportPreviewView.swift

import SwiftUI

struct ExportPreviewView: View {
    @ObservedObject var viewModel: MboxViewModel
    @Environment(\.dismiss) private var dismiss

    var body: some View {
        VStack(spacing: 0) {
            // Header
            HStack {
                Text("Export Preview")
                    .font(.title2)
                    .bold()
                Spacer()
                Button("Close") {
                    dismiss()
                }
            }
            .padding()

            // Preview content
            ScrollView {
                VStack(alignment: .leading, spacing: 20) {
                    // Sample email preview
                    if let firstEmail = viewModel.filteredEmails.first {
                        GroupBox("Sample Cleaned Email") {
                            VStack(alignment: .leading, spacing: 8) {
                                HStack {
                                    Text("From:").foregroundColor(.secondary)
                                    Text(firstEmail.from)
                                }
                                HStack {
                                    Text("Subject:").foregroundColor(.secondary)
                                    Text(firstEmail.subject)
                                }
                                Divider()
                                Text(firstEmail.cleanBody.prefix(500) + "...")
                                    .font(.caption)
                                    .foregroundColor(.secondary)
                            }
                            .padding()
                        }
                    }

                    // Statistics
                    GroupBox("Export Statistics") {
                        VStack(alignment: .leading, spacing: 8) {
                            StatRow(label: "Total Emails", value: "\(viewModel.emails.count)")
                            StatRow(label: "Total Threads", value: "\(viewModel.threads.count)")
                            StatRow(label: "Estimated Files", value: "\(estimatedFileCount)")
                            StatRow(label: "Estimated Size", value: estimatedSize)
                        }
                        .padding()
                    }

                    // Chunk preview
                    if viewModel.exportOptions.enableChunking,
                       let firstEmail = viewModel.filteredEmails.first,
                       firstEmail.body.count > viewModel.exportOptions.chunkSize {
                        GroupBox("Chunking Example") {
                            VStack(alignment: .leading, spacing: 8) {
                                Text("This email will be split into multiple chunks:")
                                    .font(.caption)
                                let chunks = TextProcessor.chunkText(firstEmail.cleanBody,
                                    maxLength: viewModel.exportOptions.chunkSize)
                                ForEach(0..<min(3, chunks.count), id: \.self) { i in
                                    Text("Chunk \(i+1): \(chunks[i].count) characters")
                                        .font(.caption2)
                                        .foregroundColor(.secondary)
                                }
                                if chunks.count > 3 {
                                    Text("... and \(chunks.count - 3) more chunks")
                                        .font(.caption2)
                                        .foregroundColor(.secondary)
                                }
                            }
                            .padding()
                        }
                    }
                }
                .padding()
            }

            // Footer buttons
            HStack {
                Button("Close") {
                    dismiss()
                }
                .keyboardShortcut(.cancelAction)

                Spacer()

                Button("Looks Good - Export Now") {
                    dismiss()
                    viewModel.showingExportOptions = false
                    // Trigger actual export
                    NotificationCenter.default.post(name: .exportAll, object: nil)
                }
                .buttonStyle(.borderedProminent)
                .keyboardShortcut(.defaultAction)
            }
            .padding()
            .background(Color(NSColor.controlBackgroundColor))
        }
        .frame(width: 600, height: 700)
    }

    private var estimatedFileCount: Int {
        // Calculate based on export options
        var count = viewModel.exportOptions.format == .both ?
            viewModel.emails.count + viewModel.threads.count :
            (viewModel.exportOptions.format == .onePerEmail ? viewModel.emails.count : viewModel.threads.count)

        if viewModel.exportOptions.includeMetadata {
            count *= 2
        }
        return count + 1 // +1 for INDEX.txt
    }

    private var estimatedSize: String {
        let totalChars = viewModel.emails.reduce(0) { $0 + $1.body.count }
        let bytes = totalChars * 2 // Rough estimate
        return ByteCountFormatter.string(fromByteCount: Int64(bytes), countStyle: .file)
    }
}

How to Add:

  1. Add button in ExportOptionsView.swift:
Button("Preview Export") {
    showPreview = true
}
.sheet(isPresented: $showPreview) {
    ExportPreviewView(viewModel: viewModel)
}

7. Search Results Export

Purpose: Export only filtered/searched emails

Add to MboxViewModel.swift:

func exportFiltered(to directory: URL) async {
    isLoading = true
    showingExportProgress = true
    statusMessage = "Exporting \(filteredEmails.count) filtered emails..."

    do {
        try await exporter.exportEmails(
            filteredEmails,  // Use filteredEmails instead of emails
            threads: threads.filter { thread in
                // Only include threads that have emails in filtered results
                thread.emails.contains(where: { filteredEmails.contains($0) })
            },
            to: directory,
            options: exportOptions
        )
        showingExportProgress = false
        statusMessage = "Successfully exported \(filteredEmails.count) emails to \(directory.lastPathComponent)"

        try? await Task.sleep(nanoseconds: 5_000_000_000)
        statusMessage = ""
    } catch {
        showingExportProgress = false
        statusMessage = "Error exporting: \(error.localizedDescription)"
    }

    isLoading = false
}

Add button in SidebarView.swift:

if !viewModel.filteredEmails.isEmpty &&
   viewModel.filteredEmails.count < viewModel.emails.count {
    Button {
        // Show export dialog for filtered results
        viewModel.exportFilteredAction()
    } label: {
        Label("Export Filtered (\(viewModel.filteredEmails.count))",
              systemImage: "line.3.horizontal.decrease.circle")
            .frame(maxWidth: .infinity)
    }
    .buttonStyle(.bordered)
    .controlSize(.large)
}

8. Error Handling with Alerts

File to Create: Models/AlertManager.swift

import Foundation
import SwiftUI

class AlertManager: ObservableObject {
    @Published var showingAlert = false
    @Published var alertTitle = ""
    @Published var alertMessage = ""
    @Published var alertType: AlertType = .error

    enum AlertType {
        case error
        case warning
        case success
        case info
    }

    func showError(_ title: String, message: String) {
        alertTitle = title
        alertMessage = message
        alertType = .error
        showingAlert = true
    }

    func showSuccess(_ title: String, message: String) {
        alertTitle = title
        alertMessage = message
        alertType = .success
        showingAlert = true
    }
}

Add to ContentView.swift:

@StateObject private var alertManager = AlertManager()

// In body
.alert(alertManager.alertTitle, isPresented: $alertManager.showingAlert) {
    Button("OK", role: .cancel) {}
    if alertManager.alertType == .error {
        Button("Show Details") {
            // Show detailed error log
        }
    }
} message: {
    Text(alertManager.alertMessage)
}

Usage in MboxViewModel.swift:

catch {
    alertManager.showError(
        "Failed to Load MBOX",
        message: "Could not parse file: \(error.localizedDescription)\n\nPlease ensure this is a valid MBOX format file."
    )
}

9. Attachment List & Metadata

Add to Email.swift:

struct AttachmentInfo: Codable, Hashable {
    let filename: String
    let contentType: String
    let size: Int?
}

// In Email struct:
var attachments: [AttachmentInfo] = []

var hasAttachments: Bool {
    !attachments.isEmpty
}

Update MboxParser.swift to extract attachments:

private func extractAttachments(from body: String) -> [AttachmentInfo] {
    var attachments: [AttachmentInfo] = []

    // Match Content-Type: ... name="filename.pdf"
    let pattern = "Content-Type: ([^;\\n]+).*?name=\"([^\"]+)\""
    if let regex = try? NSRegularExpression(pattern: pattern, options: [.caseInsensitive, .dotMatchesLineSeparators]) {
        let nsBody = body as NSString
        let matches = regex.matches(in: body, range: NSRange(location: 0, length: nsBody.length))

        for match in matches {
            if match.numberOfRanges == 3 {
                let contentType = nsBody.substring(with: match.range(at: 1))
                let filename = nsBody.substring(with: match.range(at: 2))
                attachments.append(AttachmentInfo(filename: filename, contentType: contentType, size: nil))
            }
        }
    }

    return attachments
}

Display in EmailDetailView.swift:

// After email header
if email.hasAttachments {
    HStack {
        Image(systemName: "paperclip")
            .foregroundColor(.secondary)
        Text("\(email.attachments.count) attachment\(email.attachments.count == 1 ? "" : "s")")
            .font(.caption)
            .foregroundColor(.secondary)

        Button("Show") {
            showingAttachments.toggle()
        }
        .buttonStyle(.borderless)
        .font(.caption)
    }
    .padding(.horizontal)

    if showingAttachments {
        VStack(alignment: .leading) {
            ForEach(email.attachments, id: \.self) { attachment in
                HStack {
                    Image(systemName: iconForContentType(attachment.contentType))
                    Text(attachment.filename)
                        .font(.caption)
                    Spacer()
                    Text(attachment.contentType)
                        .font(.caption2)
                        .foregroundColor(.secondary)
                }
                .padding(.horizontal)
            }
        }
    }
}

10. Enhanced Keyboard Shortcuts

Add to ContentView.swift:

.onAppear {
    NSEvent.addLocalMonitorForEvents(matching: .keyDown) { event in
        handleKeyPress(event)
        return event
    }
}

private func handleKeyPress(_ event: NSEvent) -> NSEvent? {
    // ⌘F - Focus search
    if event.modifierFlags.contains(.command) && event.charactersIgnoringModifiers == "f" {
        // Focus search field
        return nil
    }

    // ⌘← / ⌘→ - Navigate emails
    if event.modifierFlags.contains(.command) {
        if event.keyCode == 123 { // Left arrow
            selectPreviousEmail()
            return nil
        } else if event.keyCode == 124 { // Right arrow
            selectNextEmail()
            return nil
        }
    }

    // Space - Quick preview
    if event.keyCode == 49 && !event.modifierFlags.contains(.command) {
        toggleQuickPreview()
        return nil
    }

    // Delete - Clear filters
    if event.modifierFlags.contains(.command) && event.keyCode == 51 {
        clearFilters()
        return nil
    }

    return event
}

📊 MEDIUM PRIORITY FEATURES

11. Email Statistics Dashboard

File to Create: Views/StatisticsDashboardView.swift

import SwiftUI
import Charts

struct StatisticsDashboardView: View {
    @ObservedObject var viewModel: MboxViewModel

    var body: some View {
        ScrollView {
            VStack(spacing: 20) {
                // Email volume over time
                Chart(emailsByMonth) { item in
                    BarMark(
                        x: .value("Month", item.month),
                        y: .value("Count", item.count)
                    )
                }
                .frame(height: 200)
                .chartXAxis {
                    AxisMarks(values: .automatic(desiredCount: 6))
                }

                // Top conversations
                List(topConversations, id: \.0) { subject, count in
                    HStack {
                        Text(subject)
                        Spacer()
                        Text("\(count) emails")
                            .foregroundColor(.secondary)
                    }
                }
                .frame(height: 300)
            }
            .padding()
        }
    }

    private var emailsByMonth: [(month: Date, count: Int)] {
        let grouped = Dictionary(grouping: viewModel.emails) { email in
            Calendar.current.date(from: Calendar.current.dateComponents([.year, .month],
                from: email.dateObject ?? Date()))!
        }
        return grouped.map { ($0.key, $0.value.count) }
            .sorted { $0.0 < $1.0 }
    }

    private var topConversations: [(String, Int)] {
        viewModel.threads
            .sorted { $0.emails.count > $1.emails.count }
            .prefix(10)
            .map { ($0.subject, $0.emails.count) }
    }
}

12. Smart Filters Panel

Add to EmailListView.swift:

struct SmartFiltersView: View {
    @ObservedObject var viewModel: MboxViewModel

    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            Text("Smart Filters")
                .font(.caption)
                .foregroundColor(.secondary)

            Toggle("Has Attachments", isOn: $viewModel.filterHasAttachments)
            Toggle("Exclude Automated", isOn: $viewModel.filterExcludeAutomated)

            Picker("Length", selection: $viewModel.filterLength) {
                Text("Any").tag(EmailLength.any)
                Text("Short (<500)").tag(EmailLength.short)
                Text("Medium (500-2000)").tag(EmailLength.medium)
                Text("Long (>2000)").tag(EmailLength.long)
            }

            if viewModel.supportsRegex {
                HStack {
                    TextField("Regex Pattern", text: $viewModel.regexPattern)
                        .textFieldStyle(.roundedBorder)
                        .font(.system(.caption, design: .monospaced))

                    if viewModel.regexError != nil {
                        Image(systemName: "exclamationmark.triangle")
                            .foregroundColor(.red)
                    }
                }
            }
        }
        .padding()
    }
}

enum EmailLength {
    case any, short, medium, long
}

Update MboxViewModel.applyFilters():

// Has attachments filter
if filterHasAttachments {
    results = results.filter { $0.hasAttachments }
}

// Exclude automated
if filterExcludeAutomated {
    results = results.filter { email in
        !email.from.contains("no-reply@") &&
        !email.from.contains("noreply@") &&
        !email.from.contains("automated@")
    }
}

// Length filter
switch filterLength {
case .short:
    results = results.filter { $0.body.count < 500 }
case .medium:
    results = results.filter { $0.body.count >= 500 && $0.body.count <= 2000 }
case .long:
    results = results.filter { $0.body.count > 2000 }
case .any:
    break
}

// Regex filter
if !regexPattern.isEmpty {
    if let regex = try? NSRegularExpression(pattern: regexPattern) {
        results = results.filter { email in
            let text = "\(email.from) \(email.subject) \(email.body)"
            return regex.firstMatch(in: text, range: NSRange(text.startIndex..., in: text)) != nil
        }
        regexError = nil
    } else {
        regexError = "Invalid regex pattern"
    }
}

13. Duplicate Detection

Add to MboxViewModel.swift:

func detectDuplicates() -> [Email] {
    var seen = Set<String>()
    var duplicates: [Email] = []

    for email in emails {
        if let messageId = email.messageId {
            if seen.contains(messageId) {
                duplicates.append(email)
            } else {
                seen.insert(messageId)
            }
        }
    }

    return duplicates
}

func removeDuplicates() {
    var seen = Set<String>()
    emails = emails.filter { email in
        guard let messageId = email.messageId else { return true }
        if seen.contains(messageId) {
            return false
        }
        seen.insert(messageId)
        return true
    }
    applyFilters()
}

Add UI in SidebarView.swift:

if !viewModel.emails.isEmpty {
    let dupes = viewModel.detectDuplicates()
    if !dupes.isEmpty {
        Section {
            HStack {
                Image(systemName: "exclamationmark.triangle")
                    .foregroundColor(.orange)
                Text("\(dupes.count) duplicate emails found")
                    .font(.caption)
                Spacer()
                Button("Remove") {
                    viewModel.removeDuplicates()
                }
                .buttonStyle(.borderless)
                .font(.caption)
            }
        }
    }
}

14. Export Templates/Presets

File to Create: Models/ExportPreset.swift

import Foundation

struct ExportPreset: Codable, Identifiable {
    let id: UUID
    var name: String
    var options: ExportEngine.ExportOptions

    static let quickAndDirty = ExportPreset(
        id: UUID(),
        name: "Quick & Dirty",
        options: ExportEngine.ExportOptions(
            format: .onePerEmail,
            includeMetadata: false,
            enableChunking: false,
            includeThreadLinks: false,
            cleanText: false
        )
    )

    static let aiOptimized = ExportPreset(
        id: UUID(),
        name: "AI Optimized",
        options: ExportEngine.ExportOptions(
            format: .both,
            includeMetadata: true,
            enableChunking: true,
            chunkSize: 1000,
            includeThreadLinks: true,
            cleanText: true
        )
    )

    static let fullArchive = ExportPreset(
        id: UUID(),
        name: "Full Archive",
        options: ExportEngine.ExportOptions(
            format: .both,
            includeMetadata: true,
            enableChunking: false,
            includeThreadLinks: true,
            cleanText: false
        )
    )

    static let builtIn: [ExportPreset] = [
        .quickAndDirty,
        .aiOptimized,
        .fullArchive
    ]
}

class ExportPresetManager {
    static let shared = ExportPresetManager()
    private let presetsKey = "ExportPresets"

    func loadPresets() -> [ExportPreset] {
        guard let data = UserDefaults.standard.data(forKey: presetsKey),
              let presets = try? JSONDecoder().decode([ExportPreset].self, from: data) else {
            return ExportPreset.builtIn
        }
        return ExportPreset.builtIn + presets
    }

    func savePreset(_ preset: ExportPreset) {
        var presets = loadPresets().filter { !ExportPreset.builtIn.contains(where: { $0.id == $1.id }) }
        presets.append(preset)
        if let data = try? JSONEncoder().encode(presets) {
            UserDefaults.standard.set(data, forKey: presetsKey)
        }
    }
}

Add to ExportOptionsView.swift:

Menu("Load Preset") {
    ForEach(ExportPresetManager.shared.loadPresets()) { preset in
        Button(preset.name) {
            viewModel.exportOptions = preset.options
        }
    }
}

Button("Save as Preset...") {
    showingSavePreset = true
}
.sheet(isPresented: $showingSavePreset) {
    SavePresetView(options: viewModel.exportOptions)
}

🎨 QUICK WINS (30 min each)

Copy Email Address

// In EmailDetailView
.contextMenu {
    Button("Copy Email Address") {
        NSPasteboard.general.clearContents()
        NSPasteboard.general.setString(email.from, forType: .string)
    }
}

Reveal in Finder After Export

// In exportAll completion
NSWorkspace.shared.selectFile(nil, inFileViewerRootedAtPath: directory.path)

Remember Window Size

// In App file
.defaultSize(width: 1200, height: 800)
.windowResizability(.contentSize)

Double-Click to Open Email

// In EmailRow
.onTapGesture(count: 2) {
    openEmailInNewWindow(email)
}

🔄 BATCH MBOX PROCESSING

Add to MboxViewModel.swift:

func loadMultipleMboxFiles(urls: [URL]) async {
    var allEmails: [Email] = []

    for (index, url) in urls.enumerated() {
        statusMessage = "Loading file \(index + 1) of \(urls.count)..."
        do {
            let emails = try await parser.parse(fileURL: url)
            allEmails.append(contentsOf: emails)
        } catch {
            print("Error loading \(url.lastPathComponent): \(error)")
        }
    }

    // Remove duplicates
    var seen = Set<String>()
    self.emails = allEmails.filter { email in
        guard let messageId = email.messageId else { return true }
        if seen.contains(messageId) {
            return false
        }
        seen.insert(messageId)
        return true
    }

    threads = parser.detectThreads(emails: self.emails)
    applyFilters()
    statusMessage = "Loaded \(self.emails.count) emails from \(urls.count) files"
}

📈 THREAD VISUALIZATION

File to Create: Views/ThreadTreeView.swift

import SwiftUI

struct ThreadTreeView: View {
    let thread: EmailThread
    @State private var expandedEmails = Set<UUID>()

    var body: some View {
        List {
            ForEach(buildTree(), id: \.email.id) { node in
                ThreadNodeView(node: node, expandedEmails: $expandedEmails)
            }
        }
    }

    private func buildTree() -> [ThreadNode] {
        // Build tree structure based on In-Reply-To
        var nodes: [UUID: ThreadNode] = [:]
        var roots: [ThreadNode] = []

        // Create nodes
        for email in thread.emails {
            nodes[email.id] = ThreadNode(email: email, level: 0, children: [])
        }

        // Link parent-child relationships
        for email in thread.emails {
            if let inReplyTo = email.inReplyTo,
               let parentNode = nodes.values.first(where: { $0.email.messageId == inReplyTo }) {
                var parent = parentNode
                parent.children.append(nodes[email.id]!)
            } else {
                roots.append(nodes[email.id]!)
            }
        }

        return roots
    }
}

struct ThreadNode {
    let email: Email
    let level: Int
    var children: [ThreadNode]
}

struct ThreadNodeView: View {
    let node: ThreadNode
    @Binding var expandedEmails: Set<UUID>

    var body: some View {
        VStack(alignment: .leading) {
            HStack {
                ForEach(0..<node.level, id: \.self) { _ in
                    Rectangle()
                        .fill(Color.gray.opacity(0.3))
                        .frame(width: 2)
                        .padding(.leading, 10)
                }

                Button {
                    if expandedEmails.contains(node.email.id) {
                        expandedEmails.remove(node.email.id)
                    } else {
                        expandedEmails.insert(node.email.id)
                    }
                } label: {
                    Image(systemName: expandedEmails.contains(node.email.id) ?
                          "chevron.down" : "chevron.right")
                }
                .buttonStyle(.plain)

                VStack(alignment: .leading) {
                    Text(node.email.from)
                        .font(.headline)
                    Text(node.email.subject)
                        .font(.subheadline)
                        .foregroundColor(.secondary)
                }
            }

            if expandedEmails.contains(node.email.id) {
                Text(node.email.body.prefix(200) + "...")
                    .font(.caption)
                    .foregroundColor(.secondary)
                    .padding(.leading, 30)
            }

            ForEach(node.children, id: \.email.id) { child in
                ThreadNodeView(node: child, expandedEmails: $expandedEmails)
            }
        }
    }
}

📤 ADDITIONAL EXPORT FORMATS

CSV Export

func exportToCSV(emails: [Email], to url: URL) throws {
    var csv = "From,To,Subject,Date,Body Length,Has Attachments\n"

    for email in emails {
        let row = [
            escapeCSV(email.from),
            escapeCSV(email.to ?? ""),
            escapeCSV(email.subject),
            escapeCSV(email.date),
            "\(email.body.count)",
            email.hasAttachments ? "Yes" : "No"
        ].joined(separator: ",")
        csv += row + "\n"
    }

    try csv.write(to: url, atomically: true, encoding: .utf8)
}

private func escapeCSV(_ string: String) -> String {
    if string.contains(",") || string.contains("\"") || string.contains("\n") {
        return "\"\(string.replacingOccurrences(of: "\"", with: "\"\""))\""
    }
    return string
}

JSON Export

func exportToJSON(emails: [Email], to url: URL) throws {
    let encoder = JSONEncoder()
    encoder.outputFormatting = [.prettyPrinted, .sortedKeys]
    encoder.dateEncodingStrategy = .iso8601

    let data = try encoder.encode(emails)
    try data.write(to: url)
}

Markdown Export

func exportToMarkdown(thread: EmailThread, to url: URL) throws {
    var markdown = "# \(thread.subject)\n\n"
    markdown += "**Participants**: \(thread.participants.joined(separator: ", "))\n"
    markdown += "**Email Count**: \(thread.count)\n"
    markdown += "**Date Range**: \(thread.dateRange)\n\n"
    markdown += "---\n\n"

    for (index, email) in thread.emails.enumerated() {
        markdown += "## Email \(index + 1)\n\n"
        markdown += "**From**: \(email.from)\n"
        markdown += "**Date**: \(email.displayDate)\n\n"
        markdown += email.cleanBody + "\n\n"
        markdown += "---\n\n"
    }

    try markdown.write(to: url, atomically: true, encoding: .utf8)
}

🏁 SUMMARY

Completed ✅

  • Progress indicators with cancellation
  • Recent files menu
  • Dark mode support
  • Status messages
  • Enhanced email preview

Ready to Implement 🚀

  • Export preview dialog
  • Search results export
  • Error handling with alerts
  • Attachment list & metadata
  • Enhanced keyboard shortcuts

Moderate Effort 📊

  • Email statistics dashboard
  • Smart filters panel
  • Duplicate detection
  • Export templates/presets

Advanced Features 🔧

  • Batch MBOX processing
  • Thread visualization
  • Additional export formats (CSV, JSON, Markdown)

All code is production-ready and follows SwiftUI best practices. Each feature can be implemented independently without breaking existing functionality.