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02 ex. Convert Action to generic #7

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02 ex. Convert Action to generic #7

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6 changes: 3 additions & 3 deletions exercises/02-roleBasedAccess.code.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,8 @@ const userAccessModel = {
} as const;

export type Role = keyof typeof userAccessModel;
export type Action = typeof userAccessModel[Role][number];
export type Action<R extends Role> = typeof userAccessModel[R][number];

export const canUserAccess = (role: Role, action: Action) => {
return (userAccessModel[role] as ReadonlyArray<Action>).includes(action);
export const canUserAccess = <R extends Role>(role: R, action: Action<R>) => {
return (userAccessModel[role] as ReadonlyArray<Action<R>>).includes(action);
};