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45 lines
1.4 KiB
45 lines
1.4 KiB
5 years ago
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'use strict';
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module.exports = function normalizeRefPath(refPath, doc, populatedPath) {
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if (refPath == null) {
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return refPath;
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}
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if (typeof refPath === 'function') {
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refPath = refPath.call(doc, doc, populatedPath);
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}
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// If populated path has numerics, the end `refPath` should too. For example,
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// if populating `a.0.b` instead of `a.b` and `b` has `refPath = a.c`, we
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// should return `a.0.c` for the refPath.
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const hasNumericProp = /(\.\d+$|\.\d+\.)/g;
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if (hasNumericProp.test(populatedPath)) {
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const chunks = populatedPath.split(hasNumericProp);
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if (chunks[chunks.length - 1] === '') {
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throw new Error('Can\'t populate individual element in an array');
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}
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let _refPath = '';
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let _remaining = refPath;
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// 2nd, 4th, etc. will be numeric props. For example: `[ 'a', '.0.', 'b' ]`
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for (let i = 0; i < chunks.length; i += 2) {
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const chunk = chunks[i];
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if (_remaining.startsWith(chunk + '.')) {
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_refPath += _remaining.substr(0, chunk.length) + chunks[i + 1];
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_remaining = _remaining.substr(chunk.length + 1);
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} else if (i === chunks.length - 1) {
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_refPath += _remaining;
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_remaining = '';
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break;
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} else {
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throw new Error('Could not normalize ref path, chunk ' + chunk + ' not in populated path');
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}
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}
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return _refPath;
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}
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return refPath;
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};
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