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import Foundation
@Observable
@MainActor
final class SystemStatusViewModel {
private let repository: SystemStatusRepository
private(set) var snapshot: SystemStatusSnapshot?
private(set) var recentIncidents: [StatusIncident] = []
private(set) var isLoading = false
private(set) var isShowingStaleData = false
private(set) var staleDataMessage: String?
var errorMessage: String?
init(repository: SystemStatusRepository) {
self.repository = repository
}
var hasContent: Bool {
snapshot != nil || !recentIncidents.isEmpty
}
func load(forceRefresh: Bool = false) async {
if !hasContent {
isLoading = true
}
defer { isLoading = false }
errorMessage = nil
staleDataMessage = nil
isShowingStaleData = false
async let snapshotTask = repository.snapshotResult(forceRefresh: forceRefresh)
async let incidentsTask = repository.recentIncidentsResult(forceRefresh: forceRefresh)
var refreshWarnings: [String] = []
do {
let result = try await snapshotTask
snapshot = result.value
if result.isStale {
isShowingStaleData = true
staleDataMessage = "Showing the last saved system status snapshot."
if let warning = result.refreshErrorMessage {
refreshWarnings.append(warning)
}
}
} catch {
if snapshot == nil {
errorMessage = error.userFacingMessage
}
}
do {
let result = try await incidentsTask
recentIncidents = result.value
if result.isStale {
isShowingStaleData = true
staleDataMessage = staleDataMessage ?? "Showing the last saved incident history."
if let warning = result.refreshErrorMessage {
refreshWarnings.append(warning)
}
}
} catch {
if errorMessage == nil && recentIncidents.isEmpty {
errorMessage = error.userFacingMessage
}
}
if hasContent, let firstWarning = refreshWarnings.first {
errorMessage = "Showing cached system status. \(firstWarning)"
}
}
}
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