1 files changed, 63 insertions, 0 deletions
diff --git a/Hutch/Networking/SRHTError.swift b/Hutch/Networking/SRHTError.swift
new file mode 100644
index 0000000..f148c00
--- /dev/null
+++ b/Hutch/Networking/SRHTError.swift
@@ -0,0 +1,63 @@
+import Foundation
+
+/// Errors produced by the Sourcehut GraphQL client.
+enum SRHTError: LocalizedError, Sendable {
+    /// The server returned one or more GraphQL-level errors.
+    case graphQLErrors([GraphQLError])
+    /// The HTTP response had a non-2xx status code.
+    case httpError(Int)
+    /// The response data could not be decoded.
+    case decodingError(any Error)
+    /// A networking error from URLSession (timeout, DNS, connectivity, etc.).
+    case networkError(any Error)
+    /// 401 or no authentication token configured.
+    case unauthorized
+
+    var errorDescription: String? {
+        switch self {
+        case .graphQLErrors(let errors):
+            let messages = errors.map(\.message).joined(separator: "\n")
+            return "GraphQL error: \(messages)"
+        case .httpError(let code):
+            return "Server returned HTTP \(code)."
+        case .decodingError(let error):
+            return "Failed to decode response: \(error.localizedDescription)"
+        case .networkError(let error):
+            return "Network error: \(error.localizedDescription)"
+        case .unauthorized:
+            return "Authentication required. Please sign in again."
+        }
+    }
+
+    /// Whether this error represents a connectivity issue (no internet, timeout, DNS).
+    var isConnectivityError: Bool {
+        switch self {
+        case .networkError(let error):
+            let nsError = error as NSError
+            let connectivityCodes: Set<Int> = [
+                NSURLErrorNotConnectedToInternet,
+                NSURLErrorNetworkConnectionLost,
+                NSURLErrorTimedOut,
+                NSURLErrorCannotFindHost,
+                NSURLErrorCannotConnectToHost,
+                NSURLErrorDNSLookupFailed,
+                NSURLErrorInternationalRoamingOff,
+                NSURLErrorDataNotAllowed
+            ]
+            return connectivityCodes.contains(nsError.code)
+        default:
+            return false
+        }
+    }
+}
+
+/// A single error entry from the GraphQL `errors` array.
+struct GraphQLError: Decodable, Sendable {
+    let message: String
+    let locations: [GraphQLErrorLocation]?
+}
+
+struct GraphQLErrorLocation: Decodable, Sendable {
+    let line: Int
+    let column: Int
+}