Log data Visualization User

Description:

This sub-module visualizes the event log data for finding a user along with performed operations using a pie chart. The other feature is to find a list of N users with top usage for which N (input) is provided using a textfield. This allows the administrator to keep a track of the operations performed by various users. This module makes use of the d3.js module of Drupal. This caters various libraries and predefined functions for the development of various SVG data visualization techniques with minimal overhead. There are two dependencies for the log_data_visualization_analysis module: Event Log Module: (Github link to this module: https://github.com/fresearchgroup/drupal-logger ) D3 Module: (Drupal link to this module: https://www.drupal.org/project/d3 )

Implementation:

A new sub-module named log_data_visualization_user is added. The .module file implements the desired action using hook api functions namely, hook_menu and hook_permission. Details about this functions can be found at : hook_menu : To register paths to configuration page and the page used for representation of visualizations. It also associates callback functions to the corresponding registered pages. https://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_menu/7.x hook_permission : To enable administrator to provide privileges to different users. https://api.drupal.org/api/drupal/modules%21system%21system.api.php/function/hook_permission/7.x Besides the above hook api functions, some user defined functions in the sub-module are: log_data_visualization_user_admin_form: This function uses text field form api to create the required text field and submit button api to create a button. log_data_visualization_user_select: This function is called when the ‘Go to Visualization’ button is clicked and it redirects the user to the visualizations page using drupal_goto(). Further, it also sends the selected user’s uid to the visualization page. log_data_visualization_user_pie: This function is the callback function(this function is executed on redirection) for the visualization page which retrieves the operations and maintains their count for a particular uid (received as argument). Finally, it converts that data to the desired format for calling the d3_draw() function from d3 module. Log_data_visualization_user_active: After entering the number of users required to view, who are extensively using operations and then pressing the submit button, drupal_goto() will be called to redirect the user to a page wherein data will be rendered by executing this function.