Use hobbies business rules

In last post hobbies business rules were created. You can see hobbies business rules documentation + npm package.

API
br-hobbies - npm package

Today example demonstrates how to generate hobbies documents for each employee and enforce that each document complies already defined hobbies business rules.

Generate many hobbies documents

Do not repeat yourself. We use existing libraries.

import _ = require('underscore');
import Q = require('q');
var Hobbies = require('br-hobbies');
var mongoose = require('mongoose');

Thinking about program decomposition. Define steps to program.

get list of employees
iterate through each employee
- create hobbies data
- create hobbies business rules
- execute hobbies business rules
- verify results
- if OK insert to documents DB
- if NOT OK log business rules errors

//fake our employee db
var employees = [
    {FirstName:'John',LastName:'Smith'},
    {FirstName:'Goerge',LastName:'Podolsky'},
    {FirstName:'Jan',LastName:'Novak'},
    {FirstName:'Karel',LastName:'Abraham'},
    {FirstName:'Josef',LastName:'Blaha'}
]

//connect to mongo
mongoose.connect('mongodb://rsamec:[password]@ds059908.mongolab.com:59908/documents');

//create a mongoose model
var Doc = mongoose.model('docs', {
    shortName:String,
    name: String,
    desc: String,
    data: Object,
    created: Date,
    updated: Date});

//create document header
var docHeader = {
    shortName: 'hobbies',
    name:'Hobbies',
    desc:'Hobbies business rules.',
    created:new Date()
};

//iterate list of employee
_.each(employees, function(employee){

    //create  data
    var data:Hobbies.IHobbiesData = {
        Person:{
            FirstName: employee.FirstName,
            LastName: employee.LastName,
            Email: employee.FirstName.charAt(1) + employee.LastName + "@gmail.com"
        },
        Hobbies:[
            {HobbyName:"English", Frequency:Hobbies.HobbyFrequency.Weekly , Paid:true,Recommendation:true},
            {HobbyName:"Swimming", Frequency:Hobbies.HobbyFrequency.Monthly , Paid:false,Recommendation:true}
        ]
    };

    //create business rules
    var businessRules = new Hobbies.BusinessRules(data);

    //execute business rules
    var promise = businessRules.Validate();

    //verify results
    return promise.then(function (result) {

        //log if any errors encounters
        if (result.HasErrors){
            console.log('error encounters at employee: ' + employee.LastName);
            console.log(result.ErrorMessage);
            return;
        }

        //create mongo document -> combine document header with document data
        var document = new Doc(_.extend(docHeader, {data:data}));

        //save to Db
        document.save(function (err) {
            if (err) {console.log('error encounters at employee: ' + employee.LastName)};
        });
    });
})

Well done.You have just finished your task.

Hobbies Bulk Import generate valid documents

Use hobbies business rules

Generate many hobbies documents