282 lines
12 KiB
Swift
282 lines
12 KiB
Swift
// API/APIClient.swift
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import Foundation
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import Combine
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enum APIError: Error, LocalizedError, Sendable {
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case invalidURL
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case notAuthenticated
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case serverError(String)
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case decodingError(String)
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case networkError(String)
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var errorDescription: String? {
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switch self {
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case .invalidURL: return "Invalid URL."
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case .notAuthenticated: return "Session expired. Please log in again."
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case .serverError(let msg): return msg
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case .decodingError(let msg): return "Data error: \(msg)"
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case .networkError(let msg): return "Network error: \(msg)"
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}
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}
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}
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// File-scope envelope — cannot be nested in a generic function (Swift restriction).
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// T is constrained to Sendable so `data: T?` does not inherit @MainActor isolation.
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private struct _Envelope<T: Decodable & Sendable>: Decodable, Sendable {
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let ok: Bool
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let data: T?
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let error: String?
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nonisolated init(from decoder: any Decoder) throws {
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let c = try decoder.container(keyedBy: CodingKeys.self)
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ok = try c.decode(Bool.self, forKey: .ok)
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data = try? c.decode(T.self, forKey: .data)
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error = try? c.decode(String.self, forKey: .error)
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}
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private enum CodingKeys: String, CodingKey { case ok, data, error }
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}
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// Free function removed — see refreshAccessToken() which decodes using a
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// local JSONDecoder to avoid Swift 6 actor-isolation errors.
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// Refresh-only envelope — Sendable so it can cross actor boundaries in Swift 6.
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private struct _RefreshEnvelope: Decodable, Sendable {
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struct Tokens: Decodable, Sendable {
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let accessToken: String
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let refreshToken: String
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}
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let ok: Bool
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let data: Tokens?
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}
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actor APIClient {
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static let shared = APIClient()
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private let session: URLSession
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private let decoder: JSONDecoder
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private init() {
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let config = URLSessionConfiguration.default
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config.timeoutIntervalForRequest = 30
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self.session = URLSession(configuration: config)
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self.decoder = JSONDecoder()
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self.decoder.keyDecodingStrategy = .convertFromSnakeCase
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}
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// ── Generic JSON Request ──────────────────────────────────────────────
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func request<T: Decodable & Sendable>(
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_ endpoint: String,
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method: String = "GET",
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body: [String: Any]? = nil,
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retrying: Bool = false
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) async throws -> T {
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let url = try buildURL(endpoint)
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var req = buildRequest(url: url, method: method, body: body)
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injectToken(&req)
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let (data, response) = try await performRequest(req)
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if shouldRefresh(response, retrying: retrying) {
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let refreshed = await refreshAccessToken()
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if refreshed {
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return try await request(endpoint, method: method, body: body, retrying: true)
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}
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throw APIError.notAuthenticated
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}
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return try decode(data)
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}
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func post<T: Decodable & Sendable>(_ endpoint: String, body: [String: Any]) async throws -> T {
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return try await request(endpoint, method: "POST", body: body)
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}
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// ── Inspection History ────────────────────────────────────────────────
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func fetchInspectionHistory(
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limit: Int = 50,
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offset: Int = 0,
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facilityId: Int? = nil
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) async throws -> InspectionHistoryResponseData {
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var ep = "/api/v1/inspections?limit=\(limit)&offset=\(offset)&status=completed"
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if let fid = facilityId { ep += "&facility_id=\(fid)" }
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return try await request(ep)
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}
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// ── Photo Upload ──────────────────────────────────────────────────────
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func uploadPhoto(localPath: String, entityType: String) async throws -> String {
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let url = try buildURL("/api/v1/photos/upload")
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guard let imageData = FileManager.default.contents(atPath: localPath) else {
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throw APIError.networkError("Could not read photo: \(localPath)")
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}
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let boundary = "Boundary-\(UUID().uuidString)"
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let filename = URL(fileURLWithPath: localPath).lastPathComponent
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let ext = (filename as NSString).pathExtension.lowercased()
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let mime = ext == "png" ? "image/png" : "image/jpeg"
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var body = Data()
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body.append("--\(boundary)\r\nContent-Disposition: form-data; name=\"entity_type\"\r\n\r\n\(entityType)\r\n".data(using: .utf8)!)
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body.append("--\(boundary)\r\nContent-Disposition: form-data; name=\"file\"; filename=\"\(filename)\"\r\nContent-Type: \(mime)\r\n\r\n".data(using: .utf8)!)
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body.append(imageData)
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body.append("\r\n--\(boundary)--\r\n".data(using: .utf8)!)
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var req = URLRequest(url: url)
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req.httpMethod = "POST"
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req.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
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injectToken(&req)
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req.httpBody = body
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let (data, response) = try await performRequest(req)
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if shouldRefresh(response, retrying: false) {
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let refreshed = await refreshAccessToken()
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if refreshed { return try await uploadPhoto(localPath: localPath, entityType: entityType) }
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throw APIError.notAuthenticated
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}
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struct PhotoResult: Decodable, Sendable { let serverPath: String }
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if let env = try? decoder.decode(_Envelope<PhotoResult>.self, from: data),
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env.ok, let r = env.data { return r.serverPath }
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throw APIError.serverError("Photo upload failed")
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}
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// ── Submit Inspection ─────────────────────────────────────────────────
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func submitInspection(_ inspection: LocalInspection) async throws -> Int {
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// Sanitise form_data: replace any field values that are still a local
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// file reference ("local://...") with an empty string. This happens
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// when a photo upload failed but the inspection was submitted anyway.
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// JSONSerialization silently drops non-serialisable values, so without
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// this guard the server would receive a dict missing those fields
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// entirely — worse than receiving an empty string.
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var sanitisedFormData: [String: Any] = [:]
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for (k, v) in inspection.formData {
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if let s = v as? String, s.hasPrefix("local://") {
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sanitisedFormData[k] = "" // upload failed; clear the field
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} else {
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sanitisedFormData[k] = v
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}
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}
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var body: [String: Any] = [
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"template_id": inspection.templateServerId,
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"facility_id": inspection.facilityServerId,
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"status": "completed",
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"form_data": sanitisedFormData,
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"mobile_local_id": inspection.localId,
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]
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if let score = inspection.overallScore { body["overall_score"] = score }
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if let areaId = inspection.areaServerId { body["area_id"] = areaId }
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if let parentId = inspection.parentServerId { body["parent_inspection_id"] = parentId }
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if !inspection.inspectorNotes.isEmpty { body["notes"] = inspection.inspectorNotes }
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let fmt = ISO8601DateFormatter()
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body["inspection_date"] = fmt.string(from: inspection.inspectionDate)
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if let c = inspection.completedAt { body["completed_at"] = fmt.string(from: c) }
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struct R: Decodable, Sendable { let inspectionId: Int; let duplicate: Bool }
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let r: R = try await post("/api/v1/inspections", body: body)
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return r.inspectionId
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}
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// ── Submit Issue ──────────────────────────────────────────────────────
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func submitIssue(_ issue: LocalIssue) async throws -> Int {
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var body: [String: Any] = [
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"facility_id": issue.facilityServerId,
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"severity": issue.severity,
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"description": issue.issueDescription,
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"mobile_local_id": issue.localId,
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]
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if let id = issue.inspection?.serverId { body["inspection_id"] = id }
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if let path = issue.photoServerPath { body["photo_path"] = path }
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struct R: Decodable, Sendable { let issueId: Int; let duplicate: Bool }
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let r: R = try await post("/api/v1/issues", body: body)
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return r.issueId
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}
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// ── Token Refresh ─────────────────────────────────────────────────────
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private func refreshAccessToken() async -> Bool {
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guard let token = KeychainHelper.get(Constants.Keychain.refreshToken),
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let url = URL(string: Constants.baseURL + "/api/v1/auth/refresh")
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else { return false }
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var req = URLRequest(url: url)
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req.httpMethod = "POST"
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req.setValue("application/json", forHTTPHeaderField: "Content-Type")
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req.httpBody = try? JSONSerialization.data(withJSONObject: ["refresh_token": token])
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guard let (data, response) = try? await session.data(for: req),
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let http = response as? HTTPURLResponse, http.statusCode == 200
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else { return false }
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// Use a local decoder — avoids referencing the actor-isolated self.decoder
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// which would trigger a Swift 6 main-actor isolation error.
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let localDecoder = JSONDecoder()
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localDecoder.keyDecodingStrategy = .convertFromSnakeCase
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guard let env = try? localDecoder.decode(_RefreshEnvelope.self, from: data),
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env.ok,
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let tokens = env.data
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else { return false }
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KeychainHelper.set(tokens.accessToken, forKey: Constants.Keychain.accessToken)
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KeychainHelper.set(tokens.refreshToken, forKey: Constants.Keychain.refreshToken)
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return true
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}
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// ── Private Helpers ───────────────────────────────────────────────────
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private func buildURL(_ endpoint: String) throws -> URL {
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guard let url = URL(string: Constants.baseURL + endpoint) else {
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throw APIError.invalidURL
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}
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return url
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}
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private func buildRequest(url: URL, method: String, body: [String: Any]?) -> URLRequest {
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var req = URLRequest(url: url)
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req.httpMethod = method
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req.setValue("application/json", forHTTPHeaderField: "Content-Type")
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if let body { req.httpBody = try? JSONSerialization.data(withJSONObject: body) }
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return req
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}
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private func injectToken(_ req: inout URLRequest) {
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if let token = KeychainHelper.get(Constants.Keychain.accessToken) {
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req.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
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}
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}
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private func performRequest(_ req: URLRequest) async throws -> (Data, URLResponse) {
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do {
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return try await session.data(for: req)
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} catch {
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throw APIError.networkError(error.localizedDescription)
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}
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}
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private func shouldRefresh(_ response: URLResponse, retrying: Bool) -> Bool {
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guard !retrying, let http = response as? HTTPURLResponse else { return false }
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return http.statusCode == 401
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}
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private func decode<T: Decodable & Sendable>(_ data: Data) throws -> T {
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if let env = try? decoder.decode(_Envelope<T>.self, from: data) {
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if env.ok, let result = env.data { return result }
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throw APIError.serverError(env.error ?? "Unknown server error")
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}
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do {
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return try decoder.decode(T.self, from: data)
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} catch {
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throw APIError.decodingError(error.localizedDescription)
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}
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}
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}
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