将 object 值转换为 TypeScript 中的类枚举类型

Question

ParsedParametersObject["--mode"]的类型必须是Parameters[ValidFirstCommandPhrases.buildProject].mode.values 。 目前它已被硬编码，因此当将新支持的模式添加到应用程序时，我们需要编辑Parameters[ValidFirstCommandPhrases.buildProject].mode.values和ParsedParametersObject 。

如何将Parameters[ValidFirstCommandPhrases.buildProject].mode.values转换为有效的类枚举类型？

enum ValidFirstCommandPhrases {
 initializeProject = "initializeProject",
 buildProject = "buildProject"
}

export const Parameters = {
    [ValidFirstCommandPhrases.buildProject]: {
      mode: {
        name__includingDoubleNDash: "--mode",
        values: {
          development: "development",
          production: "production",
        }
      },
      debug: {
       name__includingDoubleNDash: "--debug"
     }
  }
} as const;

type ParsedParametersObject = {
    // --mode
  [Parameters[ValidFirstCommandPhrases.buildProject].mode.name__includingDoubleNDash]:
    "development" | "production"; // Hardcoded!!
}

Answer 1

您可以使用的一个选项是拥有一个专用的ENVIRONMENTS枚举并将其用作ParsedParametersObject["--mode"]类型中的类型。

见下文

enum ValidFirstCommandPhrases {
 initializeProject = "initializeProject",
 buildProject = "buildProject"
}

enum ENVIRONMENTS {
    DEVELOPMENT = 'development',
    PRODUCTION = 'production'
}

export const Parameters = {
    [ValidFirstCommandPhrases.buildProject]: {
      mode: {
        name__includingDoubleNDash: "--mode",
        values: {
          development: ENVIRONMENTS.DEVELOPMENT,
          production: ENVIRONMENTS.PRODUCTION,
        }
      },
      debug: {
       name__includingDoubleNDash: "--debug"
     }
  }
} as const;

type ParsedParametersObject = {
    // --mode
  [Parameters[ValidFirstCommandPhrases.buildProject].mode.name__includingDoubleNDash]: 
ENVIRONMENTS;
}

希望能帮助到你！