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48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
11 months ago
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'use strict';
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module.exports = function stringToParts(str) {
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const result = [];
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let curPropertyName = '';
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let state = 'DEFAULT';
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for (let i = 0; i < str.length; ++i) {
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// Fall back to treating as property name rather than bracket notation if
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// square brackets contains something other than a number.
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if (state === 'IN_SQUARE_BRACKETS' && !/\d/.test(str[i]) && str[i] !== ']') {
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state = 'DEFAULT';
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curPropertyName = result[result.length - 1] + '[' + curPropertyName;
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result.splice(result.length - 1, 1);
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}
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if (str[i] === '[') {
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if (state !== 'IMMEDIATELY_AFTER_SQUARE_BRACKETS') {
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result.push(curPropertyName);
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curPropertyName = '';
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}
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state = 'IN_SQUARE_BRACKETS';
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} else if (str[i] === ']') {
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if (state === 'IN_SQUARE_BRACKETS') {
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state = 'IMMEDIATELY_AFTER_SQUARE_BRACKETS';
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result.push(curPropertyName);
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curPropertyName = '';
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} else {
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state = 'DEFAULT';
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curPropertyName += str[i];
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}
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} else if (str[i] === '.') {
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if (state !== 'IMMEDIATELY_AFTER_SQUARE_BRACKETS') {
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result.push(curPropertyName);
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curPropertyName = '';
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}
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state = 'DEFAULT';
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} else {
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curPropertyName += str[i];
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}
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}
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if (state !== 'IMMEDIATELY_AFTER_SQUARE_BRACKETS') {
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result.push(curPropertyName);
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}
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return result;
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};
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