Instal RVM on Linux Ubuntu 64 Bit

RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems. To install Ubuntu in RVM

1. Check Apache and Mysql existed in your machine.

•  Type http://localhost or http://127.0.0.1 on your browser to check apache running.
• Check /var/www/ directory.
• In /var/www/index.html type <?php phpinfo(); ?> , then type http://localhost or http://127.0.0.1 on your browser. If apache installation in your machine already correct, your browser will load PHP informations installed on your machine

2.Run on your terminal:

• bash -s stable < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)

• source ~/.bash_profile .Note : This command is for reload opened terminal. 
• rvm requirements. Note : This command is for searching all libs that still needed, and then install the lib.

 3. Install Ruby according to the version we need:     

• rvm install 1.9.3

4.Install another version of ruby with this method.
5. To view all installed RVM 

• rvm list

6.To use specifics RVM 

• rvm use 1.9.3

 7.If there is an error when running rvm use 1.9.3 try open file ~/.bashrc and ~/.bash_profile and then add this script :

[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session

8. To use Specifics Gemset

• rvm use 1.9.3

• rvm gemset use rails3.2

• rvm use 1.9.3@rails3.2

9. Set Default RVM

• rvm use 1.9.3@rails3.2 --default

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MongoDB in PHP

The MongoDB PHP driver should work on nearly any system: Windows, Mac OS X, Unix, and Linux; little- and big-endian machines; 32- and 64-bit machines; PHP 5.2, 5.3, 5.4 and 5.5.

Install MongoDB Driver PHP

• sudo pecl install mongo

• Add extension=mongo.so in php.ini (/etc/php5/cli/php.ini)

• Restart Apache: sudo service apache2 restart

Check Installed MongoDB

• Check is MongoDB extensions already loaded in your PHP php --ini
  already installed: /etc/php5/cli/conf.d/mongo.ini
• Check is MongoDB extesions already enabled php -i | grep 'Mongo' Already Enabled: MongoDB Support => enabled
• Type <? phpinfo(); in your PHP applications.

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Install MongoDB on Ubuntu

MonggoDB provides package that supported officially. This package contains:

• mongodb-org
• mongodb-org-server
• mongodb-org-mongos
• mongodb-org-shell
• mongodb-org-tools

Install MonggoDB Package.

• Import Public Key used by Management System.

    Type on Terminal: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10

• Create List File.

    echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list

• Update Package.

    sudo apt-get update

• Install MongoDB package

    sudo apt-get install -y mongodb-org

Running MongoDB

• sudo service mongod start

MongoDB Shell

• type: mongo

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Install JRE on Ubuntu

Java Runtime Enviroment also known as JRE is part of Java Development Kit JDK a software development environment for writing Java applications. JRE consist Java Virtual Machine, core classes, and supporting files.
Installing JRE on ubuntu is a little bit different with installation JDK. First, Download the JRE file in here. Remember to download JRE version based on your system version either it's 32bit or 64bit.
After finished downloading your JRE version, we can begin the installation process.

1. Create new folder in opt directory. In terminal type this command "sudo mkdir -p -v /opt/java/64".
2. Go to folder containing your JRE download file(example: use"cd Downloads" to move to Download directory from your home directory) and unpack the file by typing "tar xvzf YOUR JRE FILE".
3. Moved unpacked contents into system folder that you created in step1. Type "sudo mv -v YOUR JRE FILE /opt/java/64".
4. Inform the system and make the new JRE become your system default.
   - sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/64/YOUR EXTRACTED JRE FILE/bin/java" 1
   - sudo update-alternatives --set java /opt/java/64/YOUR EXTRACTED JRE FILE/bin/java
5. Install Firefox plugins. Type "mkdir -v ~/.mozilla/plugins".
6. Removed IcedTea plugin, if it has been installed. type "sudo apt-get remove icedtea-6-plugin && sudo apt-get remove icedtea-7-plugin".
7. Remove an older version of the Java plugin. Type "rm -v ~/.mozilla/plugins/libnpjp2.so".
8. Install the plugin by creating symbolic link. Type "ln -s /opt/java/64/jre1.7.0_60/lib/amd64/libnpjp2.so ~/.mozilla/plugins/".
9. Close and restart Firefox
10. Type "about:plugins" in Firefox URL bar. If your installation is correct you will see something like this:

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Veritrans Rails 4 with dynamic server_key and client_key

Veritrans is Indonesian Payment Gateway. Veritrans accepts Credit Card, Direct Debit, e-Wallet,Bank Transfer and Convenience Store. That's why this Payment Gateway is famous in Indonesia. Further explanations about Veritrans https://veritrans.co.id/ .

Veritrans has multiple products with different integration method and pricing. About Veritrans Products https://veritrans.co.id/product.html

Veritrans Products:

VT-Link

VT-Link facilitates a payment feature for your online store by redirecting the customer to Veritrans payment page through a link.

VT-Web

VT-Web facilitatess merchant to use Veritrans payment system, by redirecting the customer to the Veritrans payment page.

VT-Direct

VT-Direct is Veritrans product that allows you to use our payment system directly on your website

Integration Tool Kit

• Rails 4
• gem veritrans

Configurations

Add gem Veritrans to Gem File and bundle install

    gem 'veritrans';

In Console generate veritrans.yml

rails g veritrans:install

Generate Veritrans Form

rails g veritrans:payment_form

This command will generate controller and view for Veritrans.
Because we will built dynamic key for this integrations. You can keep veritrans.yml configurations like this:

development:
  # Register in sandbox veritrans and get your keys here:
  # https://my.sandbox.veritrans.co.id/settings/config_info
  client_key: ""
  server_key: ""
  api_host: ""

production:
  # Register and get your keys here:
  # https://my.veritrans.co.id/settings/config_info
  client_key: ""
  server_key: ""
  api_host: ""

staging:
  # Register and get your keys here:
  # https://my.veritrans.co.id/settings/config_info
  client_key: ""
  server_key: ""
  api_host: ""

Scripting

VT-Web Integrations

In VT-Web Integrations, you just need to obtain redirect URL to Veritrans . After last check out process, put this function for directing page to veritrans:

@result = Veritrans.charge(
  payment_type: "VTWEB",
  transaction_details: {
    order_id: "order-id",
    gross_amount: 100_000
  }
)
// For Automatically redirect
redirect_to @result.redirect_url

VT-Direct Integrations

VT-Direct Integrations is a little bit complicated because a lot of sensitive data involved in this process.

Preparing The Form

In /views/shared/_credit_card_form   put your last checkout data in here. For example:

<%= form_for @payment, html: {class: "veritrans-payment-form", id:"card_form"} do |f| %>
<% if @settings.client_key.present? && @settings.server_key.present? && @settings.api_host.present? %>
  


Payments Page

<%= render "layouts/notification" %>
  <%= f.hidden_field :token_id, id:"card_token" %>

  

<%= label_tag "Length Of Membership" %>
    <%= number_field_tag :length_of_membership, 1,in: 1..10000 ,size: 5,class:"form-control", id:"length_of_membership",style:"width:10%;float:left;margin-right:10px;" %>Month
  

<%= label_tag "Membership Expired" %>
    <%= text_field_tag :membership_expired, (@company[:membership_expired] + 1.month).strftime('%Y-%m-%d'),size: 5,:readonly => true,class:"form-control", id:"date_expired",style:"width:75%;" %>
  

Amount (<%= @settings.currency_symbol %>)
    <%= f.number_field :amount, id:"gross_amount", size: 25,:readonly => true,class:"form-control",style:"width:75%;" %>
  

<%= label_tag :credit_card_number %>
    <%= text_field_tag :credit_card_number, '',:required => true,:placeholder => "4811 1111 1111 1114", name: nil, size: 25,class:"form-control", id:"card_number" %>
  

<%= label_tag :credit_card_cvv %>
    <%= text_field_tag :credit_card_cvv, '',:required => true,:placeholder => "123", name: nil,class:"form-control", id:"card_cvc" %>
  

<%= label_tag :credit_card_expire %>
    <%= text_field_tag :credit_card_expire, '',:required => true, placeholder: "MM / YY", name: nil,class:"form-control", id:"card_exp" %>
  

<%= f.label :credit_card_secure, "3D-secure" %>
    <%= f.check_box :credit_card_secure %>
  

<%= f.label :notes %>
    <%= text_area(:notes, :text, class:"form-control", size: "20x30") %>
  

<%= link_to (image_tag "undo-logo.png", title: :back).html_safe, users_path() %>
    <%= f.submit "Pay via VT-Direct", class:"btn green-btn" %>
  
<% else %>

Contact Administrator to do payments.


<%= link_to (image_tag "undo-logo.png", title: :back).html_safe, users_path() %>

<% end %>
<% end %>

Return Process

In Return Process build this functions

    veritrans_callback = {
      transaction_details: {
        order_id: payment.order_id,
        gross_amount: params[:payment][:amount].presence || @payment.amount
      }
    }
    // Get setting from database
    setting = Setting.first
    // Set key and host for Veritrans
    Veritrans::Config.client_key=(setting.client_key)
    Veritrans::Config.server_key=(setting.server_key)
    Veritrans::Config.api_host=(setting.api_host)

    params[:type] = "Credit Card"
    veritrans_callback[:payment_type] = "credit_card"
    veritrans_callback[:credit_card] = {}
    veritrans_callback[:credit_card][:token_id] = params[:payment][:token_id]
    result = Veritrans.charge(veritrans_callback)

    transaction_params = {}
    transaction_params = {
 order_id:payment.order_id,amounts:result.data[:gross_amount],transaction_status:result.data[:status_message],transaction_id:result.data[:transaction_id],transaction_time:result.data[:transaction_time]
}

    // If Transaction Success
    if result.data[:status_code] == "200"
      // Success Process 
    else
      // Failed Process
    end

That's All. I hope this will help anyone out there. :D

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Understanding Rubycritic Smells

Rubycritic is gem that wraps around static analysis gems such as Reek, Flay and Flog to provide a quality report of your Ruby code.

Because this gem was uses as Audit guidelines code quality in my company, I often faced hard time to adjust, optimizing and refactor my code.

I began to summarize Rubycritic detecting behavior and implement it in my code to avoid Smells and easier get at least Grade C to bare pass.

A few my conclusion things to consider when developing code according Rubycritic :

1. Don't! Never! Avoid! Duplicity Code. Rubycritic love this think and will give you sudden great high score, enough to drop your Code Rating Grade.
2. Evade complicated nested logic with multiple if, switch, etc. It's saver to use functions to handle logic rather than nested logic. Fox example
   
   

   // Rather than this
    if obj == "a"
      if obj1 == "1" && obj2 == "2"
        // Process
      elsif obj1 == "3" && obj2 == "4"
        // Process
      else
        // Process
      end
    elsif obj1 == "b"
      if obj1 == "1" && obj2 == "2"
        // Process
      elsif obj1 == "3" && obj2 == "4"
        // Process
      else
        // Process
      end
    else
     // Process
    end
   
   // Use this
    if obj == "a"
      process(obj1,obj2)
    elsif obj1 == "b"
      process(obj1,obj2)
    else
     // Process
    end
   
   

3. Evade complicated nested loops with multiple each, for, etc. It's saver to use functions to handle loops rather than nested loops. Fox example
   
   

   // Rather than this
    data_sources.each do |data_source|
     data_source.each do |data|
     end
    end
   
   // Use This
    data_sources.each do |data_source|
     process(data_source)
    end
   
   

4. If your function using nested hash, redeclare multiple used nested hash using variable.
   
   

   // rather than
   if params[:id] == '1'
     user = User.where('id = ?',params[:id])
   end
   
   // Used This
   id = params[:id]
   if id == '1'
     user = User.where('id = ?',id)
   end
   



5.  To combine Hash uses:  .merge!()
   
   

         params_data_assign = {}
         params_data_assign[:password_salt] = BCrypt::Engine.generate_salt
         params_data_assign[:password_hash] = BCrypt::Engine.hash_secret(password, self.password_salt)
         params_data.merge!(params_data_assign)
   

   
   
   
6. Use method = const_get(method) to change string into Model Constant. (surprisingly isn't it?).
   
   

     def myfunction
      my_return = obj == 'User' ? 'User' : 'Member'
      process_my_return(my_return)
     end 
     def process_my_return(my_return)
       method = const_get(my_return)
       data = method.where('id = ?',1)
       // Process
     end

If you have found something more than this or have more effective way. Please, tell us so we can share about this problem more.

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Using Zend ACL for Dynamic Access Control Privileges from Specifics Database

Zend ACL is flexible access control list implementation for  privileges management. Zend ACL has 3 different area Resources, Role, and Rights.

• Resources : Object which access is controlled.
• Role: Object which can request access to resources.
• Right:  Access Role for access resources.

As a default, Zend ACL give deny value to all resources, we have to built white list access roles for each of resources.

In this example, I will use "user_role" table as Resources, "role_access" table as Rights. 

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