128 lines
2.4 KiB
JavaScript
128 lines
2.4 KiB
JavaScript
// originally base off of https://github.com/gulpjs/vinyl
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import invariant from 'invariant';
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// interface PolyVinyl {
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// contents: String,
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// name: String,
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// ext: String,
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// path: String,
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// key: String,
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// head: String,
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// tail: String,
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// history: [...String],
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// error: Null|Object
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// }
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//
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// createPoly({
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// name: String,
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// ext: String,
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// contents: String,
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// history?: [...String],
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// }) => PolyVinyl, throws
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export function createPoly({
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name,
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ext,
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contents,
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history,
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...rest
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} = {}) {
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invariant(
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typeof name === 'string',
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'name must be a string but got %s',
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name
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);
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invariant(
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typeof ext === 'string',
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'ext must be a string, but was %s',
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ext
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);
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invariant(
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typeof contents === 'string',
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'contents must be a string but got %s',
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contents
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);
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return {
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...rest,
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history: Array.isArray(history) ? history : [ name + ext ],
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name,
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ext,
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path: name + '.' + ext,
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key: name + ext,
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contents,
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error: null
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};
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}
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// isPoly(poly: Any) => Boolean
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export function isPoly(poly) {
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return poly &&
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typeof poly.contents === 'string' &&
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typeof poly.name === 'string' &&
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typeof poly.ext === 'string' &&
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Array.isArray(poly.history);
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}
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// checkPoly(poly: Any) => Void, throws
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export function checkPoly(poly) {
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invariant(
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isPoly(poly),
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'function should receive a PolyVinyl, but got %s',
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poly
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);
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}
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// isEmpty(poly: PolyVinyl) => Boolean, throws
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export function isEmpty(poly) {
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checkPoly(poly);
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return !!poly.contents;
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}
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// updateContents(contents: String, poly: PolyVinyl) => PolyVinyl
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export function updateContents(contents, poly) {
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checkPoly(poly);
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return {
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...poly,
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contents
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};
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}
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export function setExt(ext, poly) {
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checkPoly(poly);
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const newPoly = {
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...poly,
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ext,
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path: poly.name + '.' + ext,
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key: poly.name + ext
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};
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newPoly.history = [ ...poly.history, newPoly.path ];
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return newPoly;
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}
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export function setName(name, poly) {
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checkPoly(poly);
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const newPoly = {
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...poly,
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name,
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path: name + '.' + poly.ext,
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key: name + poly.ext
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};
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newPoly.history = [ ...poly.history, newPoly.path ];
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return newPoly;
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}
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export function setError(error, poly) {
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invariant(
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typeof error === 'object',
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'error must be an object or null, but got %',
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error
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);
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checkPoly(poly);
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return {
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...poly,
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error
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};
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}
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