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|
import Foundation
// MARK: - Response types (file-private to avoid @MainActor Decodable issues)
private struct ActivityResponse: Decodable, Sendable {
/// Nullable in the schema, and null when the token lacks the EVENTS scope.
let events: ActivityPage?
}
private struct ActivityPage: Decodable, Sendable {
let results: [ActivityEventPayload]
let cursor: String?
}
private struct ActivityEventPayload: Decodable, Sendable {
let id: Int
let created: Date
let changes: [EventChange]
let ticket: ActivityTicketPayload
}
private struct ActivityTicketPayload: Decodable, Sendable {
let id: Int
let subject: String
let tracker: ActivityTrackerPayload
}
private struct ActivityTrackerPayload: Decodable, Sendable {
let id: Int
let rid: String
let name: String
let owner: Entity
}
// MARK: - View Model
/// The authenticated user's ticket activity across every tracker.
///
/// todo.sr.ht's root `events` returns what the user is subscribed to or
/// implicated in, newest first — the closest thing sr.ht offers to a personal
/// feed, and it works across trackers the user does not own.
@Observable
@MainActor
final class ActivityViewModel {
private(set) var events: [ActivityEvent] = []
private(set) var isLoading = false
private(set) var isLoadingMore = false
private(set) var hasMore = false
var error: String?
private var cursor: String?
private let client: SRHTClient
init(client: SRHTClient) {
self.client = client
}
private static let eventsQuery = """
query activity($cursor: Cursor) {
events(cursor: $cursor) {
results {
id
created
changes {
eventType: __typename
... on Created { __typename }
... on Comment {
author { canonicalName }
text
authenticity
}
... on StatusChange {
oldStatus
newStatus
}
... on LabelUpdate {
labeler { canonicalName }
label { name }
}
... on Assignment {
assigner { canonicalName }
assignee { canonicalName }
}
}
ticket {
id
subject
tracker { id rid name owner { canonicalName } }
}
}
cursor
}
}
"""
func loadIfNeeded() async {
guard events.isEmpty, !isLoading else { return }
await load()
}
func load() async {
guard !isLoading else { return }
isLoading = true
error = nil
defer { isLoading = false }
cursor = nil
do {
let page = try await fetch(cursor: nil)
events = page.events
cursor = page.cursor
hasMore = page.cursor != nil
} catch {
self.error = error.userFacingMessage
}
}
func loadMore() async {
guard !isLoadingMore, !isLoading, let cursor else { return }
isLoadingMore = true
defer { isLoadingMore = false }
do {
let page = try await fetch(cursor: cursor)
events.append(contentsOf: page.events)
self.cursor = page.cursor
hasMore = page.cursor != nil
} catch {
// Keep what is already on screen; the next scroll can retry.
self.error = error.userFacingMessage
}
}
private func fetch(cursor: String?) async throws -> (events: [ActivityEvent], cursor: String?) {
var variables: [String: any Sendable] = [:]
if let cursor {
variables["cursor"] = cursor
}
let response = try await client.execute(
service: .todo,
query: Self.eventsQuery,
variables: variables.isEmpty ? nil : variables,
responseType: ActivityResponse.self
)
guard let page = response.events else {
throw SRHTError.graphQLErrors([
GraphQLError(message: "Your token does not grant access to ticket events.", locations: nil)
])
}
let mapped = page.results.map { payload in
ActivityEvent(
id: payload.id,
created: payload.created,
changes: payload.changes,
ticketID: payload.ticket.id,
ticketSubject: payload.ticket.subject,
trackerID: payload.ticket.tracker.id,
trackerRID: payload.ticket.tracker.rid,
trackerName: payload.ticket.tracker.name,
trackerOwner: payload.ticket.tracker.owner
)
}
return (mapped, page.cursor)
}
}
/// One entry in the activity feed, flattened so the row does not have to walk
/// into the ticket and tracker payloads.
struct ActivityEvent: Identifiable, Sendable {
let id: Int
let created: Date
let changes: [EventChange]
let ticketID: Int
let ticketSubject: String
let trackerID: Int
let trackerRID: String
let trackerName: String
let trackerOwner: Entity
var ownerUsername: String {
trackerOwner.canonicalName.hasPrefix("~")
? String(trackerOwner.canonicalName.dropFirst())
: trackerOwner.canonicalName
}
/// A one-line description of what happened, from the first change.
var summary: String {
guard let change = changes.first else { return "Updated" }
switch change.eventType {
case "Created": return "Filed"
case "Comment": return "Commented"
case "StatusChange":
if let newStatus = change.newStatus {
return "Status \(newStatus.displayName.lowercased())"
}
return "Status changed"
case "LabelUpdate": return change.label.map { "Labeled \($0.name)" } ?? "Labels changed"
case "Assignment":
if let assignee = change.assignee {
return "Assigned \(assignee.canonicalName)"
}
return "Assignment changed"
default: return "Updated"
}
}
}
|
