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| 1 | import Foundation |
| 2 | |
| 3 | // MARK: - Response types (file-private to avoid @MainActor Decodable issues) |
| 4 | |
| 5 | private struct ActivityResponse: Decodable, Sendable { |
| 6 | /// Nullable in the schema, and null when the token lacks the EVENTS scope. |
| 7 | let events: ActivityPage? |
| 8 | } |
| 9 | |
| 10 | private struct ActivityPage: Decodable, Sendable { |
| 11 | let results: [ActivityEventPayload] |
| 12 | let cursor: String? |
| 13 | } |
| 14 | |
| 15 | private struct ActivityEventPayload: Decodable, Sendable { |
| 16 | let id: Int |
| 17 | let created: Date |
| 18 | let changes: [EventChange] |
| 19 | let ticket: ActivityTicketPayload |
| 20 | } |
| 21 | |
| 22 | private struct ActivityTicketPayload: Decodable, Sendable { |
| 23 | let id: Int |
| 24 | let subject: String |
| 25 | let tracker: ActivityTrackerPayload |
| 26 | } |
| 27 | |
| 28 | private struct ActivityTrackerPayload: Decodable, Sendable { |
| 29 | let id: Int |
| 30 | let rid: String |
| 31 | let name: String |
| 32 | let owner: Entity |
| 33 | } |
| 34 | |
| 35 | // MARK: - View Model |
| 36 | |
| 37 | /// The authenticated user's ticket activity across every tracker. |
| 38 | /// |
| 39 | /// todo.sr.ht's root `events` returns what the user is subscribed to or |
| 40 | /// implicated in, newest first — the closest thing sr.ht offers to a personal |
| 41 | /// feed, and it works across trackers the user does not own. |
| 42 | @Observable |
| 43 | @MainActor |
| 44 | final class ActivityViewModel { |
| 45 | |
| 46 | private(set) var events: [ActivityEvent] = [] |
| 47 | private(set) var isLoading = false |
| 48 | private(set) var isLoadingMore = false |
| 49 | private(set) var hasMore = false |
| 50 | var error: String? |
| 51 | |
| 52 | private var cursor: String? |
| 53 | private let client: SRHTClient |
| 54 | |
| 55 | init(client: SRHTClient) { |
| 56 | self.client = client |
| 57 | } |
| 58 | |
| 59 | private static let eventsQuery = """ |
| 60 | query activity($cursor: Cursor) { |
| 61 | events(cursor: $cursor) { |
| 62 | results { |
| 63 | id |
| 64 | created |
| 65 | changes { |
| 66 | eventType: __typename |
| 67 | ... on Created { __typename } |
| 68 | ... on Comment { |
| 69 | author { canonicalName } |
| 70 | text |
| 71 | authenticity |
| 72 | } |
| 73 | ... on StatusChange { |
| 74 | oldStatus |
| 75 | newStatus |
| 76 | } |
| 77 | ... on LabelUpdate { |
| 78 | labeler { canonicalName } |
| 79 | label { name } |
| 80 | } |
| 81 | ... on Assignment { |
| 82 | assigner { canonicalName } |
| 83 | assignee { canonicalName } |
| 84 | } |
| 85 | } |
| 86 | ticket { |
| 87 | id |
| 88 | subject |
| 89 | tracker { id rid name owner { canonicalName } } |
| 90 | } |
| 91 | } |
| 92 | cursor |
| 93 | } |
| 94 | } |
| 95 | """ |
| 96 | |
| 97 | func loadIfNeeded() async { |
| 98 | guard events.isEmpty, !isLoading else { return } |
| 99 | await load() |
| 100 | } |
| 101 | |
| 102 | func load() async { |
| 103 | guard !isLoading else { return } |
| 104 | isLoading = true |
| 105 | error = nil |
| 106 | defer { isLoading = false } |
| 107 | |
| 108 | cursor = nil |
| 109 | do { |
| 110 | let page = try await fetch(cursor: nil) |
| 111 | events = page.events |
| 112 | cursor = page.cursor |
| 113 | hasMore = page.cursor != nil |
| 114 | } catch { |
| 115 | self.error = error.userFacingMessage |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | func loadMore() async { |
| 120 | guard !isLoadingMore, !isLoading, let cursor else { return } |
| 121 | isLoadingMore = true |
| 122 | defer { isLoadingMore = false } |
| 123 | |
| 124 | do { |
| 125 | let page = try await fetch(cursor: cursor) |
| 126 | events.append(contentsOf: page.events) |
| 127 | self.cursor = page.cursor |
| 128 | hasMore = page.cursor != nil |
| 129 | } catch { |
| 130 | // Keep what is already on screen; the next scroll can retry. |
| 131 | self.error = error.userFacingMessage |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | private func fetch(cursor: String?) async throws -> (events: [ActivityEvent], cursor: String?) { |
| 136 | var variables: [String: any Sendable] = [:] |
| 137 | if let cursor { |
| 138 | variables["cursor"] = cursor |
| 139 | } |
| 140 | |
| 141 | let response = try await client.execute( |
| 142 | service: .todo, |
| 143 | query: Self.eventsQuery, |
| 144 | variables: variables.isEmpty ? nil : variables, |
| 145 | responseType: ActivityResponse.self |
| 146 | ) |
| 147 | |
| 148 | guard let page = response.events else { |
| 149 | throw SRHTError.graphQLErrors([ |
| 150 | GraphQLError(message: "Your token does not grant access to ticket events.", locations: nil) |
| 151 | ]) |
| 152 | } |
| 153 | |
| 154 | let mapped = page.results.map { payload in |
| 155 | ActivityEvent( |
| 156 | id: payload.id, |
| 157 | created: payload.created, |
| 158 | changes: payload.changes, |
| 159 | ticketID: payload.ticket.id, |
| 160 | ticketSubject: payload.ticket.subject, |
| 161 | trackerID: payload.ticket.tracker.id, |
| 162 | trackerRID: payload.ticket.tracker.rid, |
| 163 | trackerName: payload.ticket.tracker.name, |
| 164 | trackerOwner: payload.ticket.tracker.owner |
| 165 | ) |
| 166 | } |
| 167 | return (mapped, page.cursor) |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /// One entry in the activity feed, flattened so the row does not have to walk |
| 172 | /// into the ticket and tracker payloads. |
| 173 | struct ActivityEvent: Identifiable, Sendable { |
| 174 | let id: Int |
| 175 | let created: Date |
| 176 | let changes: [EventChange] |
| 177 | let ticketID: Int |
| 178 | let ticketSubject: String |
| 179 | let trackerID: Int |
| 180 | let trackerRID: String |
| 181 | let trackerName: String |
| 182 | let trackerOwner: Entity |
| 183 | |
| 184 | var ownerUsername: String { |
| 185 | trackerOwner.canonicalName.hasPrefix("~") |
| 186 | ? String(trackerOwner.canonicalName.dropFirst()) |
| 187 | : trackerOwner.canonicalName |
| 188 | } |
| 189 | |
| 190 | /// A one-line description of what happened, from the first change. |
| 191 | var summary: String { |
| 192 | guard let change = changes.first else { return "Updated" } |
| 193 | switch change.eventType { |
| 194 | case "Created": return "Filed" |
| 195 | case "Comment": return "Commented" |
| 196 | case "StatusChange": |
| 197 | if let newStatus = change.newStatus { |
| 198 | return "Status \(newStatus.displayName.lowercased())" |
| 199 | } |
| 200 | return "Status changed" |
| 201 | case "LabelUpdate": return change.label.map { "Labeled \($0.name)" } ?? "Labels changed" |
| 202 | case "Assignment": |
| 203 | if let assignee = change.assignee { |
| 204 | return "Assigned \(assignee.canonicalName)" |
| 205 | } |
| 206 | return "Assignment changed" |
| 207 | default: return "Updated" |
| 208 | } |
| 209 | } |
| 210 | } |