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import { Either, type IEither } from "@emprespresso/pengueno";
export const getRequiredEnv = (name: string): IEither<Error, string> =>
Either
.fromFailable<Error, string | undefined>(() => Deno.env.get(name)) // could throw when no permission.
.flatMap((v) =>
(v &&
Either.right(v)) ||
Either.left(
new Error(`environment variable "${name}" is required D:`),
)
);
export const getRequiredEnvVars = (vars: Array<string>) =>
vars
.map((envVar) =>
[envVar, getRequiredEnv(envVar)] as [string, IEither<Error, string>]
)
.reduce((acc, x: [string, IEither<Error, string>]) => {
const [envVar, eitherVal] = x;
return acc.flatMap((args) => {
return eitherVal.mapRight((envValue) => ({
...args,
[envVar]: envValue,
}));
});
}, Either.right<Error, Record<string, string>>({}));
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