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import SwiftUI
/// Side-by-side comparison of two tracked domains' latest reports, reusing the
/// same section-diff rendering (`DomainDiffView`) that time-based history diffs
/// use, via `DiffService.compare(domainA:domainB:)`.
struct DomainCompareView: View {
@Bindable var viewModel: DomainViewModel
@State private var domainAID: UUID?
@State private var domainBID: UUID?
private var states: [PortfolioDomainStatus] {
viewModel.portfolioDashboardData.domainStates
}
private var stateA: PortfolioDomainStatus? {
states.first { $0.trackedDomain.id == domainAID }
}
private var stateB: PortfolioDomainStatus? {
states.first { $0.trackedDomain.id == domainBID }
}
private var result: DomainComparisonResult? {
guard let stateA, let stateB, stateA.trackedDomain.id != stateB.trackedDomain.id else {
return nil
}
return DiffService.compare(domainA: stateA.report, domainB: stateB.report)
}
var body: some View {
List {
Section("Domains") {
domainPicker("Domain A", selection: $domainAID)
domainPicker("Domain B", selection: $domainBID)
}
if domainAID != nil, domainAID == domainBID {
Section {
Text("Choose two different domains to compare.")
.font(.callout)
.foregroundStyle(.secondary)
}
}
if let result {
Section {
DomainDiffView(
title: "\(result.domainA) vs \(result.domainB)",
sections: result.sections,
contextNote: result.contextNote,
showsUnchanged: true,
highlightedSectionID: nil
)
}
.listRowBackground(Color.clear)
} else if domainAID == nil || domainBID == nil {
Section {
EmptyStateCardView(
title: "Pick Two Domains",
message: "Select a domain in each slot to see a side-by-side comparison across DNS, TLS, ownership, and risk.",
suggestion: "Both domains must already be tracked.",
systemImage: "arrow.left.arrow.right",
showsCardBackground: false
)
}
.listRowBackground(Color(.appSurface))
}
}
.scrollContentBackground(.hidden)
.background(Color(.appBackground))
.navigationTitle("Compare Domains")
}
private func domainPicker(_ label: String, selection: Binding<UUID?>) -> some View {
Picker(label, selection: selection) {
Text("Select a domain").tag(UUID?.none)
ForEach(states) { state in
Text(state.trackedDomain.domain).tag(Optional(state.trackedDomain.id))
}
}
}
}
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