add a createLabelPublisher

apple/OmnivoreKit/Sources/Services/DataService/Mutations/CreateLabelPublisher.swift

@@ -0,0 +1,62 @@
+import Combine
+import Foundation
+import Models
+import SwiftGraphQL
+
+public extension DataService {
+  func createLabelPublisher(
+    name: String,
+    color: String,
+    description: String?
+  ) -> AnyPublisher<FeedItemLabel, BasicError> {
+    enum MutationResult {
+      case saved(label: FeedItemLabel)
+      case error(errorCode: Enums.CreateLabelErrorCode)
+    }
+
+    let selection = Selection<MutationResult, Unions.CreateLabelResult> {
+      try $0.on(
+        createLabelSuccess: .init { .saved(label: try $0.label(selection: feedItemLabelSelection)) },
+        createLabelError: .init { .error(errorCode: try $0.errorCodes().first ?? .badRequest) }
+      )
+    }
+
+    let mutation = Selection.Mutation {
+      try $0.createLabel(
+        input: InputObjects.CreateLabelInput(
+          name: name,
+          color: color,
+          description: OptionalArgument(description)
+        ),
+        selection: selection
+      )
+    }
+
+    let path = appEnvironment.graphqlPath
+    let headers = networker.defaultHeaders
+
+    return Deferred {
+      Future { promise in
+        send(mutation, to: path, headers: headers) { result in
+          switch result {
+          case let .success(payload):
+            if let graphqlError = payload.errors {
+              promise(.failure(.message(messageText: "graphql error: \(graphqlError)")))
+            }
+
+            switch payload.data {
+            case let .saved(label: label):
+              promise(.success(label))
+            case let .error(errorCode: errorCode):
+              promise(.failure(.message(messageText: errorCode.rawValue)))
+            }
+          case .failure:
+            promise(.failure(.message(messageText: "graphql error")))
+          }
+        }
+      }
+    }
+    .receive(on: DispatchQueue.main)
+    .eraseToAnyPublisher()
+  }
+}

apple/OmnivoreKit/Sources/Services/DataService/Queries/LibraryItemsQuery.swift

@@ -148,16 +148,6 @@ let homeFeedItemSelection = Selection.Article {
   )
 }
 
-private let feedItemLabelSelection = Selection.Label {
-  FeedItemLabel(
-    id: try $0.id(),
-    name: try $0.name(),
-    color: try $0.color(),
-    createdAt: try $0.createdAt()?.value,
-    description: try $0.description()
-  )
-}
-
 private let articleEdgeSelection = Selection.ArticleEdge {
   try $0.node(selection: homeFeedItemSelection)
 }

apple/OmnivoreKit/Sources/Services/DataService/Selections/FeedItemLabelSelection.swift

@@ -0,0 +1,12 @@
+import Models
+import SwiftGraphQL
+
+let feedItemLabelSelection = Selection.Label {
+  FeedItemLabel(
+    id: try $0.id(),
+    name: try $0.name(),
+    color: try $0.color(),
+    createdAt: try $0.createdAt()?.value,
+    description: try $0.description()
+  )
+}