56 lines
1.1 KiB
JavaScript
56 lines
1.1 KiB
JavaScript
'use strict';
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module.exports = (options, fn, target) => {
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const chainables = options.chainableMethods || {};
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const spread = options.spread;
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const defaults = Object.assign({}, options.defaults);
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function extend(target, getter, ctx) {
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for (const key of Object.keys(chainables)) {
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Object.defineProperty(target, key, {
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enumerable: true,
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configurable: true,
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get() {
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return wrap(getter, chainables[key], ctx || this);
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}
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});
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}
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}
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function wrap(createOpts, extensionOpts, ctx) {
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function wrappedOpts() {
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return Object.assign(createOpts(), extensionOpts);
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}
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function wrappedFn() {
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let args = new Array(arguments.length);
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for (let i = 0; i < args.length; i++) {
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args[i] = arguments[i];
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}
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if (spread) {
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args.unshift(wrappedOpts());
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} else {
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args = [wrappedOpts(), args];
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}
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return fn.apply(ctx || this, args);
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}
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extend(wrappedFn, wrappedOpts, ctx);
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return wrappedFn;
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}
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function copyDefaults() {
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return Object.assign({}, defaults);
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}
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if (target) {
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extend(target, copyDefaults);
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return target;
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}
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return wrap(copyDefaults);
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};
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