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import Foundation
@Observable
@MainActor
final class RepositoryACLViewModel {
let repository: RepositorySummary
private let service: any RepositoryACLServicing
private(set) var entries: [RepositoryACLEntry] = []
private(set) var isLoading = false
private(set) var loadError: String?
private(set) var updatingEntryIDs: Set<Int> = []
private(set) var deletingEntryIDs: Set<Int> = []
private(set) var isCreatingEntry = false
var addUsername = ""
var addMode: AccessMode = .ro
var error: String?
init(
repository: RepositorySummary,
service: any RepositoryACLServicing
) {
self.repository = repository
self.service = service
}
var visibleEntries: [RepositoryACLEntry] {
sort(entries.filter { normalizedIdentity($0.entity.canonicalName) != normalizedIdentity(repository.owner.canonicalName) })
}
var hasEntries: Bool {
!visibleEntries.isEmpty
}
var addValidationMessage: String? {
Self.validateEntityInput(
addUsername,
ownerCanonicalName: repository.owner.canonicalName,
existingEntities: visibleEntries.map(\.entity.canonicalName)
)
}
var canSubmitNewEntry: Bool {
addValidationMessage == nil && !isCreatingEntry
}
func load() async {
guard !isLoading else { return }
isLoading = true
defer { isLoading = false }
do {
entries = try await service.fetchACLs(repositoryRid: repository.rid)
loadError = nil
} catch {
let message = error.userFacingMessage
if entries.isEmpty {
loadError = message
} else {
self.error = message
}
}
}
func addEntry() async -> Bool {
guard let entity = validatedNewEntity() else {
error = addValidationMessage ?? "Enter a valid username."
return false
}
isCreatingEntry = true
defer { isCreatingEntry = false }
error = nil
do {
let entry = try await service.upsertACL(
repositoryId: repository.id,
entity: entity,
mode: addMode
)
merge(entry)
addUsername = ""
addMode = .ro
await refreshAfterMutation()
return true
} catch {
self.error = error.userFacingMessage
return false
}
}
func updatePermission(for entry: RepositoryACLEntry, to mode: AccessMode) async {
guard entry.mode != mode else { return }
updatingEntryIDs.insert(entry.id)
defer { updatingEntryIDs.remove(entry.id) }
error = nil
do {
let updatedEntry = try await service.upsertACL(
repositoryId: repository.id,
entity: entry.entity.canonicalName,
mode: mode
)
merge(updatedEntry)
await refreshAfterMutation()
} catch {
self.error = error.userFacingMessage
}
}
func removeEntry(_ entry: RepositoryACLEntry) async {
deletingEntryIDs.insert(entry.id)
defer { deletingEntryIDs.remove(entry.id) }
error = nil
do {
try await service.deleteACL(entryId: entry.id)
entries.removeAll { $0.id == entry.id }
await refreshAfterMutation()
} catch {
self.error = error.userFacingMessage
}
}
func isUpdating(_ entry: RepositoryACLEntry) -> Bool {
updatingEntryIDs.contains(entry.id)
}
func isDeleting(_ entry: RepositoryACLEntry) -> Bool {
deletingEntryIDs.contains(entry.id)
}
static func canonicalEntity(from input: String) -> String? {
guard validateEntityInput(input, ownerCanonicalName: nil, existingEntities: []) == nil else {
return nil
}
let trimmed = input.trimmingCharacters(in: .whitespacesAndNewlines)
let username = trimmed.hasPrefix("~") ? String(trimmed.dropFirst()) : trimmed
return "~\(username)"
}
static func validateEntityInput(
_ input: String,
ownerCanonicalName: String?,
existingEntities: [String]
) -> String? {
let trimmed = input.trimmingCharacters(in: .whitespacesAndNewlines)
guard !trimmed.isEmpty else { return "Enter a username." }
guard !trimmed.contains(where: \.isWhitespace) else { return "Usernames cannot contain spaces." }
let username = trimmed.hasPrefix("~") ? String(trimmed.dropFirst()) : trimmed
guard !username.isEmpty else { return "Enter a username." }
guard username.first != "~", !username.contains("~") else { return "Enter a valid username." }
guard username.range(of: #"^[A-Za-z0-9][A-Za-z0-9._-]*$"#, options: .regularExpression) != nil else {
return "Enter a valid username."
}
if let ownerCanonicalName, normalizedIdentity(ownerCanonicalName) == normalizedIdentity(username) {
return "The repository owner already has access."
}
if existingEntities.contains(where: { normalizedIdentity($0) == normalizedIdentity(username) }) {
return "That user already has access."
}
return nil
}
}
private extension RepositoryACLViewModel {
func validatedNewEntity() -> String? {
guard addValidationMessage == nil else { return nil }
return Self.canonicalEntity(from: addUsername)
}
func refreshAfterMutation() async {
do {
entries = try await service.fetchACLs(repositoryRid: repository.rid)
loadError = nil
} catch {
self.error = "Saved, but couldn't refresh access list: \(error.userFacingMessage)"
}
}
func merge(_ entry: RepositoryACLEntry) {
if let index = entries.firstIndex(where: { $0.id == entry.id }) {
entries[index] = entry
} else {
entries.append(entry)
}
entries = sort(entries)
}
func sort(_ entries: [RepositoryACLEntry]) -> [RepositoryACLEntry] {
entries.sorted {
$0.entity.canonicalName.localizedCaseInsensitiveCompare($1.entity.canonicalName) == .orderedAscending
}
}
static func normalizedIdentity(_ value: String) -> String {
let trimmed = value.trimmingCharacters(in: .whitespacesAndNewlines)
return trimmed.hasPrefix("~") ? String(trimmed.dropFirst()).lowercased() : trimmed.lowercased()
}
func normalizedIdentity(_ value: String) -> String {
Self.normalizedIdentity(value)
}
}
|
