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//
// SecurityEventStore.swift
// octosentry
//
// Holds the fetched event stream for the popover. Watch list, seen-state,
// and last-fetch timestamps are persisted (see PersistedState); the token
// comes from Keychain, put there by the device authorization flow (spec §6).
//
// Each alert source is fetched independently, per repo, so a problem
// with one endpoint (or one repo) doesn't blank out the rest. A 403/404
// on a single source usually just means that alert type is disabled for
// the repo (or the token lacks that one permission) — not a real
// failure — so those are reported as quiet "unavailable" notices rather
// than alarming errors.
//
import Foundation
import Observation
@Observable
final class SecurityEventStore {
private(set) var events: [SecurityEvent] = []
private(set) var isLoading = false
private(set) var errorMessages: [String] = []
private(set) var unavailableNotices: [String] = []
private(set) var minimumSeverity: SecurityEventSeverity = .low
private(set) var totalFetchedCount = 0
private(set) var watchedRepos: [String] = []
private(set) var watchListErrorMessage: String?
var unseenCriticalCount: Int {
rawEvents.filter { $0.severity == .critical && !$0.seenLocally }.count
}
private let persistenceStore = PersistenceStore()
private var rawEvents: [SecurityEvent] = []
private var pollingTask: Task<Void, Never>?
func refresh() async {
isLoading = true
errorMessages = []
unavailableNotices = []
defer { isLoading = false }
var state = await persistenceStore.load()
minimumSeverity = state.minimumSeverity
watchedRepos = state.watchedRepos
guard let token = KeychainTokenStore.load() else {
errorMessages = [GitHubAPIError.missingToken.errorDescription ?? "Not signed in."]
return
}
let client = GitHubSecurityAPIClient(token: token)
var fetchedEvents: [SecurityEvent] = []
var errors: [String] = []
var notices: [String] = []
for repoFullName in state.watchedRepos {
let parts = repoFullName.split(separator: "/", maxSplits: 1)
guard parts.count == 2 else { continue }
let owner = String(parts[0])
let repo = String(parts[1])
async let dependabot = fetchSource(label: "\(repoFullName) · Dependabot") {
try await client.fetchDependabotAlerts(owner: owner, repo: repo)
}
async let codeScanning = fetchSource(label: "\(repoFullName) · Code scanning") {
try await client.fetchCodeScanningAlerts(owner: owner, repo: repo)
}
async let secretScanning = fetchSource(label: "\(repoFullName) · Secret scanning") {
try await client.fetchSecretScanningAlerts(owner: owner, repo: repo)
}
let outcomes = await [dependabot, codeScanning, secretScanning]
var repoSucceeded = false
for outcome in outcomes {
switch outcome {
case .events(let sourceEvents):
fetchedEvents += sourceEvents
repoSucceeded = true
case .unavailable(let label):
notices.append("\(label) alerts aren't available for this repo (disabled, or token lacks that permission).")
case .failed(let label, let message):
errors.append("\(label): \(message)")
}
}
if repoSucceeded {
state.lastFetchByRepo[repoFullName] = Date()
}
}
rawEvents = fetchedEvents.map { event in
var event = event
event.seenLocally = state.seenEventIDs.contains(event.id)
return event
}
totalFetchedCount = rawEvents.count
applyMinimumSeverityFilter()
errorMessages = errors
unavailableNotices = notices
await persistenceStore.save(state)
}
func setMinimumSeverity(_ severity: SecurityEventSeverity) async {
minimumSeverity = severity
applyMinimumSeverityFilter()
var state = await persistenceStore.load()
state.minimumSeverity = severity
await persistenceStore.save(state)
}
func addRepo(_ input: String) async {
watchListErrorMessage = nil
let trimmed = input.trimmingCharacters(in: .whitespacesAndNewlines)
let parts = trimmed.split(separator: "/", omittingEmptySubsequences: true)
guard parts.count == 2 else {
watchListErrorMessage = "Enter a repo as \"owner/repo\"."
return
}
// Store the canonical "owner/repo" rather than the raw input, so
// stray slashes (e.g. "owner/repo/") can't produce a malformed
// entry that silently 404s on refresh.
let repoFullName = "\(parts[0])/\(parts[1])"
var state = await persistenceStore.load()
// GitHub owner/repo names are case-insensitive, so treat entries
// that differ only in case as the same watched repo.
guard !state.watchedRepos.contains(where: {
$0.caseInsensitiveCompare(repoFullName) == .orderedSame
}) else {
watchListErrorMessage = "\(repoFullName) is already watched."
return
}
state.watchedRepos.append(repoFullName)
await persistenceStore.save(state)
watchedRepos = state.watchedRepos
await refresh()
}
/// Lists repos the current token can see, for the repo picker (#15).
/// Requires broader repo-access scope — throws if the token only has
/// the default security_events scope.
func fetchAccessibleRepos() async throws -> [String] {
guard let token = KeychainTokenStore.load() else {
throw GitHubAPIError.missingToken
}
return try await GitHubSecurityAPIClient(token: token).fetchAccessibleRepos()
}
/// Local-only triage state (spec §11) — no API write, no scope beyond
/// read needed. Removes the event from the active stream.
func markSeen(_ eventID: String) async {
var state = await persistenceStore.load()
state.seenEventIDs.insert(eventID)
await persistenceStore.save(state)
rawEvents.removeAll { $0.id == eventID }
totalFetchedCount = rawEvents.count
applyMinimumSeverityFilter()
}
func removeRepo(_ repoFullName: String) async {
var state = await persistenceStore.load()
state.watchedRepos.removeAll { $0 == repoFullName }
state.lastFetchByRepo.removeValue(forKey: repoFullName)
await persistenceStore.save(state)
watchedRepos = state.watchedRepos
await refresh()
}
/// Keeps the feed reasonably fresh even while the popover is closed,
/// without hammering GitHub's rate limit (5000/hr authenticated).
/// Idempotent — safe to call every time the popover opens.
func startPolling(interval: Duration = .seconds(900)) {
guard pollingTask == nil else { return }
pollingTask = Task {
while !Task.isCancelled {
try? await Task.sleep(for: interval)
guard !Task.isCancelled else { return }
await refresh()
}
}
}
private func applyMinimumSeverityFilter() {
events = rawEvents
.filter { $0.severity >= minimumSeverity }
.sorted { lhs, rhs in
lhs.severity != rhs.severity ? lhs.severity > rhs.severity : lhs.createdAt > rhs.createdAt
}
}
private enum SourceOutcome {
case events([SecurityEvent])
case unavailable(label: String)
case failed(label: String, message: String)
}
private func fetchSource(
label: String,
_ operation: () async throws -> [SecurityEvent]
) async -> SourceOutcome {
do {
return .events(try await operation())
} catch GitHubAPIError.forbidden, GitHubAPIError.notFound {
return .unavailable(label: label)
} catch {
let description = (error as? LocalizedError)?.errorDescription ?? error.localizedDescription
return .failed(label: label, message: description)
}
}
}
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