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