splitter.js

var _ = require('underscore.string');
var fs = require('fs');

exports.run = (text, flood_dir_name, maxColumns) => {
  // first check text convert it into each paragraph
  var paragraphs = _.words(text, '\n');
  var statusList = [];

  paragraphs.forEach((paragraph) => {
    paragraph = paragraph.trim();

    var mediaRegex = /^M:<(.*?)>(.*)/;
    var metaRegex = /^META-(.*?):<(.*)>/;
    var mediaMatch = mediaRegex.exec(paragraph);
    var metaMatch = metaRegex.exec(paragraph);
    var mediaPath = null;

    // check whether there is a meta involved, if so skip
    if (metaMatch != null) {
      // skipping this line
           
    }
    // check whether there is a media involved
    else if (mediaMatch != null) {
      mediaPath = mediaMatch[1];

      // Update the paragraph by trimming the media
      paragraph = mediaMatch[2];

      if (paragraph.length > maxColumns) {
        throw new Error(`Status attached to the media can not exceed ${maxColumns} characters`);
      }

      mediaPath = require('path').join(flood_dir_name, mediaPath);

      // Validate the media involved, if any not found, throw an error
      if (!fs.existsSync(mediaPath)) {
        throw new Error(`Media file with path ${mediaPath} not found`);
      }

      statusList = statusList.concat({
        media: mediaPath,
        text: paragraph === '' ? null : paragraph
      });
    } else {
      var foldedStr = _.wrap(paragraph, { width: maxColumns, seperator: '\n', cut: false, trailingSpaces: false });

      var splittedLines = _.words(foldedStr, '\n');

      // check whether any of splitted strings have longer columns than 'maxColumns'
      splittedLines.forEach((element) => {
        if (element.length > maxColumns) {
          throw new Error('Unable to split because there is a very long word');
        }

        statusList = statusList.concat({
          media: mediaPath,
          text: element
        });
      });
    }
  });

  return statusList;
};