Oli Sturm
50 lines
1.2 KiB
JavaScript
50 lines
1.2 KiB
JavaScript
export const ok = (value) => ({
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isSuccess: true,
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isFailure: false,
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value,
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});
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export const fail = (error) => ({
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isSuccess: false,
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isFailure: true,
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error,
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});
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export const catchResult = (f, exceptionMapper) => {
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try {
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return ok(f());
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} catch (e) {
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return fail(exceptionMapper(e));
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}
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};
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export const bind = (binder) => (result) =>
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result.isSuccess ? binder(result.value) : fail(result.error);
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export const map = (mapper) => (result) =>
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result.isSuccess ? ok(mapper(result.value)) : fail(result.error);
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export const tap = (action) => (result) => {
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if (result.isSuccess) action(result.value);
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return result;
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};
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export const tapError = (action) => (result) => {
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if (result.isFailure) action(result.error);
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return result;
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};
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export const mapError = (mapper) => (result) =>
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result.isSuccess ? ok(result.value) : fail(mapper(result.error));
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export const match = (onSuccess, onFailure) => (result) =>
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result.isSuccess ? onSuccess(result.value) : onFailure(result.error);
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export const switch_ = (onSuccess, onFailure) => (result) => {
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if (result.isSuccess) onSuccess(result.value);
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else onFailure(result.error);
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};
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export const pipe = (result, ...fns) =>
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fns.reduce((acc, fn) => fn(acc), result);
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