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