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40 lines
1.0 KiB
40 lines
1.0 KiB
var noop = require('./noop');
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var defaults = require('./defaults');
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var toArr = require('./toArr');
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var isArr = require('./isArr');
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var isErr = require('./isErr');
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exports = function(fn, options) {
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defaults(options, defOptions);
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return function() {
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var args = toArr(arguments);
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var newArgs = options.before.apply(this, args);
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if (isArr(newArgs)) {
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args = newArgs;
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}
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try {
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var result = fn.apply(this, args);
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var newResult = options.after.call(this, result);
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if (newResult) {
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result = newResult;
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}
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return result;
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} catch (e) {
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var newErr = options.error(e);
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if (newErr) {
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if (isErr(newErr)) {
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throw newErr;
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} else {
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return newErr;
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}
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}
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throw e;
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}
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};
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};
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var defOptions = {
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before: noop,
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after: noop,
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error: noop
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};
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module.exports = exports;
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