137 lines
3 KiB
JavaScript
137 lines
3 KiB
JavaScript
'use strict';
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var typeOf = require('kind-of');
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var extend = require('extend-shallow');
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/**
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* Parse sections in `input` with the given `options`.
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*
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* ```js
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* var sections = require('{%= name %}');
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* var result = sections(input, options);
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* // { content: 'Content before sections', sections: [] }
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* ```
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* @param {String|Buffer|Object} `input` If input is an object, it's `content` property must be a string or buffer.
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* @param {Object} options
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* @return {Object} Returns an object with a `content` string and an array of `sections` objects.
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* @api public
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*/
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module.exports = function(input, options) {
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if (typeof options === 'function') {
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options = { parse: options };
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}
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var file = toObject(input);
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var defaults = {section_delimiter: '---', parse: identity};
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var opts = extend({}, defaults, options);
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var delim = opts.section_delimiter;
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var lines = file.content.split(/\r?\n/);
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var sections = null;
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var section = createSection();
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var content = [];
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var stack = [];
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function initSections(val) {
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file.content = val;
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sections = [];
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content = [];
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}
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function closeSection(val) {
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if (stack.length) {
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section.key = getKey(stack[0], delim);
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section.content = val;
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opts.parse(section, sections);
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sections.push(section);
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section = createSection();
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content = [];
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stack = [];
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}
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}
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for (var i = 0; i < lines.length; i++) {
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var line = lines[i];
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var len = stack.length;
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var ln = line.trim();
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if (isDelimiter(ln, delim)) {
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if (ln.length === 3 && i !== 0) {
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if (len === 0 || len === 2) {
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content.push(line);
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continue;
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}
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stack.push(ln);
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section.data = content.join('\n');
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content = [];
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continue;
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}
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if (sections === null) {
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initSections(content.join('\n'));
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}
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if (len === 2) {
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closeSection(content.join('\n'));
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}
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stack.push(ln);
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continue;
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}
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content.push(line);
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}
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if (sections === null) {
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initSections(content.join('\n'));
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} else {
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closeSection(content.join('\n'));
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}
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file.sections = sections;
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return file;
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};
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function isDelimiter(line, delim) {
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if (line.slice(0, delim.length) !== delim) {
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return false;
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}
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if (line.charAt(delim.length + 1) === delim.slice(-1)) {
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return false;
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}
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return true;
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}
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function toObject(input) {
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if (typeOf(input) !== 'object') {
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input = { content: input };
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}
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if (typeof input.content !== 'string' && !isBuffer(input.content)) {
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throw new TypeError('expected a buffer or string');
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}
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input.content = input.content.toString();
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input.sections = [];
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return input;
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}
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function getKey(val, delim) {
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return val ? val.slice(delim.length).trim() : '';
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}
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function createSection() {
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return { key: '', data: '', content: '' };
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}
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function identity(val) {
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return val;
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}
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function isBuffer(val) {
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if (val && val.constructor && typeof val.constructor.isBuffer === 'function') {
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return val.constructor.isBuffer(val);
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}
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return false;
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}
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