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[rbdr/captura] / Captura / Data / CapturaURLDecoder.swift

/*
 Copyright (C) 2024 Rubén Beltrán del Río

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program. If not, see https://captura.tranquil.systems.
 */
import Foundation

protocol ConfigureActionProtocol {
  var action: String { get }
  var fps: Int? { get }
  var outputs: OutputFormatSetting? { get }
  var backend: URL? { get }
  var backendOutput: OutputFormatSetting? { get }
  var keepLocalFiles: Bool? { get }
}

protocol RecordActionProtocol {
  var action: String { get }

  var x: Int? { get }
  var y: Int? { get }
  var width: Int? { get }
  var height: Int? { get }
  var preventResize: Bool? { get }
  var preventMove: Bool? { get }
  var fps: Int? { get }
  var backend: URL? { get }
  var outputs: OutputFormatSetting? { get }
  var backendOutput: OutputFormatSetting? { get }
  var keepLocalFiles: Bool? { get }
  var autoStart: Bool? { get }
  var skipBackend: Bool { get }
  var maxLength: Int? { get }
}

// The concrete implementations
struct ConfigureAction: ConfigureActionProtocol {
  let action: String
  var fps: Int?
  var outputs: OutputFormatSetting?
  var backend: URL?
  var backendOutput: OutputFormatSetting?
  var keepLocalFiles: Bool?
}

struct RecordAction: RecordActionProtocol {
  let action: String
  var x: Int?
  var y: Int?
  var width: Int?
  var height: Int?
  var preventResize: Bool?
  var preventMove: Bool?
  var fps: Int?
  var outputs: OutputFormatSetting?
  var backend: URL?
  var backendOutput: OutputFormatSetting?
  var keepLocalFiles: Bool?
  var autoStart: Bool?
  var skipBackend: Bool
  var maxLength: Int?
}

enum CapturaAction {
  case record(RecordAction)
  case configure(ConfigureAction)
}

struct CapturaURLDecoder {

  static func decodeParams(url: URL) -> CapturaAction? {
    guard let components = URLComponents(url: url, resolvingAgainstBaseURL: false),
      let params = components.queryItems
    else {
      return nil
    }

    var paramsDict = [String: Any]()

    params.forEach { item in
      paramsDict[item.name] = item.value
    }

    guard let action = paramsDict["action"] as? String else {
      return nil
    }

    switch action {
    case "configure":
      var fps = Int(paramsDict["fps"] as? String ?? "")
      let backend = URL(string: paramsDict["backend"] as? String ?? "")
      let keepLocalFiles = Bool(paramsDict["keep_local_files"] as? String ?? "")
      let outputs = OutputFormatSetting(paramsDict["outputs"] as? String ?? "")
      var backendOutput = OutputFormatSetting(paramsDict["backend_output"] as? String ?? "")

      if fps != nil {
        fps = min(10, max(4, fps!))
      }

      if backendOutput == .all {
        backendOutput = .gifOnly
      }

      return .configure(
        ConfigureAction(
          action: action,
          fps: fps,
          outputs: outputs,
          backend: backend,
          backendOutput: backendOutput,
          keepLocalFiles: keepLocalFiles
        ))

    case "record":
      let x = Int(paramsDict["x"] as? String ?? "")
      let y = Int(paramsDict["y"] as? String ?? "")
      let width = Int(paramsDict["width"] as? String ?? "")
      let height = Int(paramsDict["height"] as? String ?? "")
      let preventResize = Bool(paramsDict["prevent_resize"] as? String ?? "")
      let preventMove = Bool(paramsDict["prevent_move"] as? String ?? "")
      var fps = Int(paramsDict["fps"] as? String ?? "")
      let backend = URL(string: paramsDict["backend"] as? String ?? "")
      let keepLocalFiles = Bool(paramsDict["keep_local_files"] as? String ?? "")
      let outputs = OutputFormatSetting(paramsDict["outputs"] as? String ?? "")
      var backendOutput = OutputFormatSetting(paramsDict["backend_output"] as? String ?? "")
      let autoStart = Bool(paramsDict["auto_start"] as? String ?? "")
      var maxLength = Int(paramsDict["max_length"] as? String ?? "")

      if fps != nil {
        fps = min(10, max(4, fps!))
      }

      if maxLength != nil {
        maxLength = min(300, max(1, fps!))
      }

      if backendOutput == .all {
        backendOutput = .gifOnly
      }

      var skipBackend = false
      if let backendString = paramsDict["backend"] as? String {
        if backendString == "" {
          skipBackend = true
        }
      }

      return .record(
        RecordAction(
          action: action,
          x: x,
          y: y,
          width: width,
          height: height,
          preventResize: preventResize,
          preventMove: preventMove,
          fps: fps,
          outputs: outputs,
          backend: backend,
          backendOutput: backendOutput,
          keepLocalFiles: keepLocalFiles,
          autoStart: autoStart,
          skipBackend: skipBackend,
          maxLength: maxLength
        ))

    default:
      return nil
    }
  }
}