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|
import Foundation
@Observable
@MainActor
final class ContributionCalendarViewModel {
enum DisplayState: Equatable {
case populated
case indexing
case empty
case unavailable
}
private(set) var calendar: ContributionCalendarResponse?
private(set) var stats: ContributionStatsResponse?
private(set) var isLoading = false
var loadErrorMessage: String?
var selectedEndDate: Date
let actor: String
private let service: any ContributionCalendarServing
private let currentEndDate: Date
init(
actor: String,
service: any ContributionCalendarServing,
selectedEndDate: Date? = nil
) {
self.actor = actor
self.service = service
let today = Calendar.contributionCalendar.startOfDay(for: Date())
let resolvedEndDate = Calendar.contributionCalendar.startOfDay(for: selectedEndDate ?? today)
self.selectedEndDate = resolvedEndDate
self.currentEndDate = today
}
var weekColumns: [ContributionWeek] {
ContributionCalendarLayout.weekColumns(from: calendar?.days ?? [])
}
var recentWeekColumns: [ContributionWeek] {
ContributionCalendarLayout.recentWeeks(from: calendar?.days ?? [], count: 8)
}
var isEmpty: Bool {
calendar?.isEmpty ?? false
}
var isIndexedButEmpty: Bool {
displayState != .populated
&& displayState != .unavailable
&& ((stats?.totalEvents == 0) || (calendar?.isEmpty == true))
}
var displayState: DisplayState {
if hasActivity {
return .populated
}
switch effectiveIndexingState {
case .pending:
return .indexing
case .error:
return .unavailable
case .indexed:
return .empty
case nil:
return .empty
}
}
var emptyStateTitle: String {
switch displayState {
case .indexing:
"Indexing Activity"
case .empty:
"No Contribution Activity"
case .unavailable:
"Activity Unavailable"
case .populated:
""
}
}
var emptyStateMessage: String {
switch displayState {
case .indexing:
"This user’s SourceHut activity is being indexed. Check back soon."
case .empty:
"No activity was found for this time range."
case .unavailable:
"The contribution graph couldn’t be refreshed right now. Try again later."
case .populated:
""
}
}
var lastUpdatedText: String? {
guard let lastPolledAt = effectiveLastPolledAt else {
return nil
}
return "Updated \(lastPolledAt.formatted(date: .abbreviated, time: .shortened))"
}
var canAdvanceYear: Bool {
selectedEndDate < currentEndDate
}
var displayedRangeText: String {
let range = trailingRange
return "\(range.lowerBound.formatted(date: .abbreviated, time: .omitted)) to \(range.upperBound.formatted(date: .abbreviated, time: .omitted))"
}
func load() async {
isLoading = true
loadErrorMessage = nil
defer { isLoading = false }
debugLog("load start actor=\(actor) endDate=\(selectedEndDate.formatted(date: .abbreviated, time: .omitted))")
let fetchedCalendar: ContributionCalendarResponse?
let fetchedStats: ContributionStatsResponse?
var errors: [any Error] = []
do {
fetchedCalendar = try await service.fetchContributionCalendar(actor: actor, endingOn: selectedEndDate)
} catch {
fetchedCalendar = nil
errors.append(error)
}
do {
fetchedStats = try await service.fetchContributionStats(actor: actor, endingOn: selectedEndDate)
} catch {
fetchedStats = nil
errors.append(error)
}
calendar = fetchedCalendar
stats = fetchedStats
if displayState != .unavailable {
loadErrorMessage = nil
} else if fetchedCalendar == nil && fetchedStats == nil {
loadErrorMessage = errors.first?.userFacingMessage
} else {
loadErrorMessage = errors.first?.userFacingMessage
}
debugLog(
"load complete actor=\(actor) endDate=\(selectedEndDate.formatted(date: .abbreviated, time: .omitted)) state=\(String(describing: displayState)) " +
"calendarDays=\(calendar?.days.count ?? 0) totalEvents=\(stats?.totalEvents ?? 0) " +
"indexingState=\(String(describing: effectiveIndexingState)) error=\(loadErrorMessage ?? "none")"
)
}
func selectPreviousYear() async {
guard let previousEndDate = Calendar.contributionCalendar.date(byAdding: .year, value: -1, to: selectedEndDate) else {
return
}
selectedEndDate = previousEndDate
await load()
}
func selectNextYear() async {
guard canAdvanceYear else { return }
let advancedDate = Calendar.contributionCalendar.date(byAdding: .year, value: 1, to: selectedEndDate) ?? currentEndDate
selectedEndDate = min(advancedDate, currentEndDate)
await load()
}
private var hasActivity: Bool {
if let stats, stats.totalEvents > 0 {
return true
}
if let calendar, !calendar.isEmpty {
return true
}
return false
}
private var effectiveIndexingState: ContributionIndexingState? {
stats?.indexingState ?? calendar?.indexingState
}
private var effectiveLastPolledAt: Date? {
stats?.lastPolledAt ?? calendar?.lastPolledAt
}
private var trailingRange: ClosedRange<Date> {
let normalizedEndDate = Calendar.contributionCalendar.startOfDay(for: selectedEndDate)
let oneYearBack = Calendar.contributionCalendar.date(byAdding: .year, value: -1, to: normalizedEndDate) ?? normalizedEndDate
let normalizedStartDate = Calendar.contributionCalendar.date(byAdding: .day, value: 1, to: oneYearBack) ?? oneYearBack
return normalizedStartDate...normalizedEndDate
}
private func debugLog(_ message: String) {
#if DEBUG
print("[ContributionCalendarViewModel] \(message)")
#endif
}
}
|
