nodepub/src/constituents/replacements.js

Create valid EPUB (v2) ebooks with metadata, contents and cover image.

const moment = require('moment');

// Replace a single tag.
const tagReplace = (original, tag, value) => {
  const fullTag = `[[${tag}]]`;
  return original.split(fullTag).join(value || '');
};

// Do all in-line replacements needed.
const replacements = (document, original) => {
  const modified = moment().format('YYYY-MM-DD');
  let result = original;
  result = tagReplace(result, 'EOL', '\n');
  result = tagReplace(result, 'COVER', document.metadata.cover);
  result = tagReplace(result, 'ID', document.metadata.id);
  result = tagReplace(result, 'TITLE', document.metadata.title);
  result = tagReplace(result, 'SERIES', document.metadata.series);
  result = tagReplace(result, 'SEQUENCE', document.metadata.sequence);
  result = tagReplace(result, 'COPYRIGHT', document.metadata.copyright);
  result = tagReplace(result, 'LANGUAGE', document.metadata.language);
  result = tagReplace(result, 'FILEAS', document.metadata.fileAs);
  result = tagReplace(result, 'AUTHOR', document.metadata.author);
  result = tagReplace(result, 'PUBLISHER', document.metadata.publisher);
  result = tagReplace(result, 'DESCRIPTION', document.metadata.description);
  result = tagReplace(result, 'PUBLISHED', document.metadata.published);
  result = tagReplace(result, 'GENRE', document.metadata.genre);
  result = tagReplace(result, 'TAGS', document.metadata.tags);
  result = tagReplace(result, 'CONTENTS', document.metadata.contents);
  result = tagReplace(result, 'SOURCE', document.metadata.source);
  result = tagReplace(result, 'MODIFIED', modified);
  return result;
};

module.exports = replacements;