Sailsjs Seed Generator for https://github.com/lykmapipo/sails-hook-seed

SeedGeneratorService.js

/**
 * SeedGeneratorService
 *
 * @description :: Will generate seeds from the model specied in the development/production directory
 * @help        :: See http://sailsjs.org/documentation/concepts/services/creating-a-service
 */
module.exports = {
    _config: {
        dir: sails.config.appPath + '/seeds'
    },
    //Get Layouts by reading the directory
    //Will be used for layout select box
    generate: function(model_names, destination_dir) {
      var fs = require('fs');
      var path = require('path');
      var processSeedRequest = function() {
        if(model_names.length) {
          model_name = model_names.shift();
          var model_name_lower = model_name.toLowerCase(); //since sails keep all models name in lower case
          if(sails.models[model_name_lower]) {
            sails.models[model_name_lower].find()
              .sort('id ASC')
              .populateAll()
              .exec(function(err, rows) {
                //console.log(rows);
                var seedFilePath = path.join(SeedGeneratorService._config.dir, destination_dir, model_name + 'Seed.js');
                console.log(seedFilePath);
                //console.log(fs.readFileSync(seedFilePath));

                fs.exists(seedFilePath, function(exists) {
                  console.log(exists);
                  if(exists)
                  {
                    fs.unlink(seedFilePath, function(err) {
                      console.log('Old seed file deleted.');
                      startExport(rows, seedFilePath);
                    });
                  }
                  else
                    startExport(rows, seedFilePath);
                });
              });
          }
          var startExport = function(data, file_path) {
            console.log('Importing');
            //console.log(JSON.stringify(data, null, 4));
            var file_content = "module.exports =  function(done) {\r\n";
            file_content += "  var data = ";
            data = JSON.stringify(data, null, 4); //just remove attributes, which are function
            data = JSON.parse(data);
            data.map(function(obj) {
              var keys = Object.keys(obj);
              for(var i = 0, total = keys.length; i<total; i++)
              {
                if(obj[keys[i]] instanceof Array) {
                  obj[keys[i]] = obj[keys[i]].map(function(innerObj) {
                    return innerObj.id;
                  });
                }
                else if(obj[keys[i]] instanceof Object) {
                  obj[keys[i]] = obj[keys[i]].id;
                }
              }
              return obj;
            });
            file_content += JSON.stringify(data, null, 4);
            file_content += ";\r\n";
            file_content += "//remember to tell when your are done\r\n done(null, data);\r\n};";
            fs.writeFile(file_path, file_content, function(err) {
              if(err) {
                console.log(err);
              } else {
                console.log("seed saved to " + file_path);
              }
              processSeedRequest();
            });
          };
        }
        else
        {
          console.log('Seed generation is completed..');
        }
      };
      processSeedRequest();
    }
};