l0bsterssg

node.js static responsive blog post generator
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stringify.js (1427B)

      1 'use strict';
      2 
      3 const typeOf = require('kind-of');
      4 const getEngine = require('./engine');
      5 const defaults = require('./defaults');
      6 
      7 module.exports = function(file, data, options) {
      8   if (data == null && options == null) {
      9     switch (typeOf(file)) {
     10       case 'object':
     11         data = file.data;
     12         options = {};
     13         break;
     14       case 'string':
     15         return file;
     16       default: {
     17         throw new TypeError('expected file to be a string or object');
     18       }
     19     }
     20   }
     21 
     22   const str = file.content;
     23   const opts = defaults(options);
     24   if (data == null) {
     25     if (!opts.data) return file;
     26     data = opts.data;
     27   }
     28 
     29   const language = file.language || opts.language;
     30   const engine = getEngine(language, opts);
     31   if (typeof engine.stringify !== 'function') {
     32     throw new TypeError('expected "' + language + '.stringify" to be a function');
     33   }
     34 
     35   data = Object.assign({}, file.data, data);
     36   const open = opts.delimiters[0];
     37   const close = opts.delimiters[1];
     38   const matter = engine.stringify(data, options).trim();
     39   let buf = '';
     40 
     41   if (matter !== '{}') {
     42     buf = newline(open) + newline(matter) + newline(close);
     43   }
     44 
     45   if (typeof file.excerpt === 'string' && file.excerpt !== '') {
     46     if (str.indexOf(file.excerpt.trim()) === -1) {
     47       buf += newline(file.excerpt) + newline(close);
     48     }
     49   }
     50 
     51   return buf + newline(str);
     52 };
     53 
     54 function newline(str) {
     55   return str.slice(-1) !== '\n' ? str + '\n' : str;
     56 }