gulp-tasks-soda/gulp-tasks/twig/twigLoader.fs.js

Gulp tasks for Soda drupal theme

var DrupalAttribute = require('drupal-attribute');


module.exports = function (Twig) {
  'use strict';

  let fs;
  let path;

  try {
    // Require lib dependencies at runtime
    fs = require('fs');
    path = require('path');
  } catch (error) {
    // NOTE: this is in a try/catch to avoid errors cross platform
  }

  Twig.Templates.registerLoader('fs', function (location, params, callback, errorCallback) {
    let template;
    let data = null;
    const {precompiled} = params;
    const parser = this.parsers[params.parser] || this.parser.twig;

    if (!fs || !path) {
      throw new Twig.Error('Unsupported platform: Unable to load from file ' +
        'because there is no "fs" or "path" implementation');
    }

    const loadTemplateFn = function (err, data) {
      if (err) {
        if (typeof errorCallback === 'function') {
          errorCallback(err);
        }

        return;
      }

      if (precompiled === true) {
        data = JSON.parse(data);
      }
      let attributes = new DrupalAttribute();

      params.data = data;
      params.path = params.path || location;
      // Template is in data
      template = parser.call(this, params);

      if (typeof callback === 'function') {
        callback(template);
      }
    };

    params.path = params.path || location;

    if (params.async) {
      fs.stat(params.path, (err, stats) => {
        if (err || !stats.isFile()) {
          if (typeof errorCallback === 'function') {
            errorCallback(new Twig.Error('Unable to find template file ' + params.path));
          }

          return;
        }
        console.log('async');
        fs.readFile(params.path, 'utf8', loadTemplateFn);
      });
      // TODO: return deferred promise
      return true;
    }

    try {
      if (!fs.statSync(params.path).isFile()) {
        throw new Twig.Error('Unable to find template file ' + params.path);
      }
    } catch (error) {
      throw new Twig.Error('Unable to find template file ' + params.path);
    }

    data = fs.readFileSync(params.path, 'utf8');

    var jsonFile = params.path.replace('.twig','.json');

   var templateData = {};
    if(fs.existsSync(jsonFile)) {
      try {
        templateData = fs.readFileSync(jsonFile);
      } catch (objError) {
        console.error(objError.message);
        console.log(jsonFile);
      }
    };
    if(fs.existsSync(jsonFile)) {
      data = '{% defaultvalues %}' + templateData +'{% enddefaultvalues %}' + data;
    }
    loadTemplateFn(undefined, data);


    return template;
  });
};