32 lines
817 B
JavaScript
32 lines
817 B
JavaScript
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const visit = require('unist-util-visit');
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function headingToLevel(heading) {
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const match = /^h(\d+)/.exec(heading);
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return match ? match[1] : '0';
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}
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function parseMappings(mappings) {
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const mapping = {};
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Object.keys(mappings).forEach(key => mapping[headingToLevel(key)] = headingToLevel(mappings[key]));
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return mapping;
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}
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module.exports = function mapHeadings(mappings) {
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const headings = parseMappings(mappings || {});
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return () => ast => {
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const nodesToFix = [];
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Object.keys(headings).forEach(heading => {
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visit(ast, 'heading', node => {
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if (node.depth === Number(heading)) {
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nodesToFix.push(node);
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}
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});
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});
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// Update the depth of the matched nodes
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nodesToFix.forEach(node => node.depth = headings[node.depth]);
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return ast;
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};
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};
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