Add LibreTranslate integration for machine translating notes from other languages

damus/Models/LibreTranslateServer.swift

@@ -0,0 +1,44 @@
+//
+//  LibreTranslateServer.swift
+//  damus
+//
+//  Created by Terry Yiu on 1/21/23.
+//
+
+import Foundation
+
+enum LibreTranslateServer: String, CaseIterable, Identifiable {
+    var id: String { self.rawValue }
+
+    struct Model: Identifiable, Hashable {
+        var id: String { self.tag }
+        var tag: String
+        var displayName: String
+        var url: String?
+    }
+
+    case none
+    case argosopentech
+    case terraprint
+    case vern
+    case custom
+
+    var model: Model {
+        switch self {
+        case .none:
+            return .init(tag: self.rawValue, displayName: NSLocalizedString("None", comment: "Dropdown option for selecting no translation server."), url: nil)
+        case .argosopentech:
+            return .init(tag: self.rawValue, displayName: "translate.argosopentech.com", url: "https://translate.argosopentech.com")
+        case .terraprint:
+            return .init(tag: self.rawValue, displayName: "translate.terraprint.co", url: "https://translate.terraprint.co")
+        case .vern:
+            return .init(tag: self.rawValue, displayName: "lt.vern.cc", url: "https://lt.vern.cc")
+        case .custom:
+            return .init(tag: self.rawValue, displayName: NSLocalizedString("Custom", comment: "Dropdown option for selecting a custom translation server."), url: nil)
+        }
+    }
+
+    static var allModels: [Model] {
+        return Self.allCases.map { $0.model }
+    }
+}