40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
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function isBuffer(obj) {
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return (obj &&
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obj.constructor &&
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typeof obj.constructor.isBuffer === "function" &&
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obj.constructor.isBuffer(obj));
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}
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/*
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Forked from https://github.com/hughsk/flat
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*/
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export function flatten(target, opts = {}) {
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opts = opts || {};
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const delimiter = opts.delimiter || ".";
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const maxDepth = opts.maxDepth;
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const transformKey = opts.transformKey || ((key) => (isNaN(parseInt(key)) ? key : ""));
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const output = [];
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function step(object, prev, currentDepth) {
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currentDepth = currentDepth || 1;
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Object.keys(object).forEach(function (key) {
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const value = object[key];
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const isarray = opts.safe && Array.isArray(value);
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const type = Object.prototype.toString.call(value);
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const isbuffer = isBuffer(value);
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const isobject = type === "[object Object]" || type === "[object Array]";
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const newKey = prev
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? prev + delimiter + transformKey(key)
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: transformKey(key);
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if (!isarray &&
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!isbuffer &&
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isobject &&
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Object.keys(value).length &&
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(!opts.maxDepth || currentDepth < maxDepth)) {
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return step(value, newKey, currentDepth + 1);
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}
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output.push(`${newKey}=${value}`);
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});
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}
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step(target);
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return output;
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}
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