gitbay/MRs/MRCreateViewModel.swift

 1import Foundation
 2import Observation
 3
 4/// `mr create <repo> --source <b> --target <b> --title <t> --file -`.
 5///
 6/// Branch names are typed, not picked: no command lists branches yet
 7/// (krz/gitbay#45). The target prefills with the default branch from
 8/// `repo show`.
 9@Observable
10@MainActor
11final class MRCreateViewModel {
12
13    private(set) var working = false
14    private(set) var errorMessage: String?
15    private(set) var defaultBranch: String?
16
17    private let client: GitbayClient
18    let repoPath: String
19
20    init(client: GitbayClient, repoPath: String) {
21        self.client = client
22        self.repoPath = repoPath
23    }
24
25    func loadDefaultBranch() async {
26        guard defaultBranch == nil else { return }
27        defaultBranch = (try? await client.read(
28            ["repo", "show", repoPath], as: RepoDetail.self
29        ))?.defaultBranch
30    }
31
32    nonisolated private struct Created: Decodable, Sendable {
33        let number: Int64
34    }
35
36    func create(source: String, target: String, title: String, body: String) async -> Int64? {
37        working = true
38        errorMessage = nil
39        defer { working = false }
40        do {
41            var argv = ["mr", "create", repoPath,
42                        "--source", source, "--target", target, "--title", title]
43            var stdin: String?
44            if !body.isEmpty {
45                argv.append(contentsOf: ["--file", "-"])
46                stdin = body
47            }
48            let created = try await client.run(argv, stdin: stdin, as: Created.self)
49            return created?.number
50        } catch let error as GitbayError {
51            errorMessage = error.userFacingMessage
52        } catch {
53            errorMessage = GitbayError.transport(error).userFacingMessage
54        }
55        return nil
56    }
57}