如何将字符串转换为枚举总和类型？

Question

这个问题可能看起来和the one about converting strings to enums类似，但我的情况要复杂一些。我有两个不同的枚举和另一个总和类型：

enum InteractiveStep {
    Pick = 'PICK',
    Ban = 'BAN'
}

enum AutoStep {
    RandomPick = 'RANDOM_PICK',
    LastPick = 'LAST_PICK'
}

type ActionStep = InteractiveStep | AutoStep

如何检查ActionStep类型中是否包含任意字符串，并安全转换？

Answer 1

使用this discussion，我想出了这个：

enum InteractiveStep {
    Pick = 'PICK',
    Ban = 'BAN'
}

enum AutoStep {
    RandomPick = 'RANDOM_PICK',
    LastPick = 'LAST_PICK'
}

type ActionStep = InteractiveStep | AutoStep
const ActionStep = {...InteractiveStep, ...AutoStep}

const inputString: string = 'RANDOM_PICK'

const inputStep: ActionStep = ActionStep[inputString as keyof typeof ActionStep];