68 lines
1.4 KiB
JavaScript
68 lines
1.4 KiB
JavaScript
var { Cache, normalizePath, split, forEach } = require('./')
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var setCache = new Cache(512),
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getCache = new Cache(512)
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function makeSafe(path, param) {
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var result = param,
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parts = split(path),
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isLast
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forEach(parts, function (part, isBracket, isArray, idx, parts) {
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isLast = idx === parts.length - 1
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part = isBracket || isArray ? '[' + part + ']' : '.' + part
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result += part + (!isLast ? ' || {})' : ')')
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})
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return new Array(parts.length + 1).join('(') + result
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}
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function expr(expression, safe, param) {
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expression = expression || ''
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if (typeof safe === 'string') {
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param = safe
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safe = false
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}
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param = param || 'data'
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if (expression && expression.charAt(0) !== '[') expression = '.' + expression
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return safe ? makeSafe(expression, param) : param + expression
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}
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module.exports = {
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expr,
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setter: function (path) {
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if (
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path.indexOf('__proto__') !== -1 ||
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path.indexOf('constructor') !== -1 ||
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path.indexOf('prototype') !== -1
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) {
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return (obj) => obj
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}
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return (
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setCache.get(path) ||
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setCache.set(
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path,
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new Function('data, value', expr(path, 'data') + ' = value')
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)
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)
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},
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getter: function (path, safe) {
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var key = path + '_' + safe
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return (
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getCache.get(key) ||
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getCache.set(
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key,
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new Function('data', 'return ' + expr(path, safe, 'data'))
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)
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)
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},
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}
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