<?php 
/**
 * @package CISY
 * @version 0.1
 */
/*
Plugin Name: CISY
Plugin URI: http://raritanval.rogueleaf.com/
Description: This adds in grade information to BuddyPress.
Author: Steve Caruso
Version: 0.1
Author URI: http://steve.rogueleaf.com/
*/


defined( 'ABSPATH' ) or die( 'No script kiddies please!' );


/* THE IDEA:

Student: Wordpress user, BuddyPress group member.
Professor: Wordpress user, BuddyPress group administrator.

Topic: (Week or individual class)
 - Title (Wordpress title)
 - Author (Wordpress author)
 - Class (BuddyPress group)
 - Begins
 - Ends

Assignment
 - Title (Wordpress title)
 - Class (BuddyPress group)
 - Topic (Topic post type)
 - Visible?
 - Begins
 - Ends
 - Accept Late?
 - Accept Late Until
 - Body (Wordpress post text)
 - Comments (Wordpress post comments)
 - Quiz (metadata in SCORM format to be interpreted by software)
 - Score
 - OutOf
 - Category (GradeCategory)
 - File uploads (Normal Wordpress)

Submission
 - Assignment (Assignment post type)
 - Student (Wordpress user)
 - Body (Wordpress post text)
 - Comments (Wordpress post comments)
 - Quiz answers (properly escaped metadata)
 - File uploads (CUSTOM)

GradingScale (metadata on BuddyPress group)

GradeCategory
 - Title (Wordpress title)
 - Percentage [of total]

Grade
 - Title (Wordpress title)
 - Student (Wordpress user)
 - Class (BuddyPress group)
 - Assignment (Assignment post type)
 - Submission (Submission post type)
 - Score
 - OutOf
 - Category (GradeCategory)


Topics are listed on the Class tab of the group.
Each topic can have 0+ Assignments attached to it.
Students fill out Assignments which become Submissions.
Submissions are graded and become Grades which show up on the Student’s Grades tab in the Class Group.
Attendance is taken by hidden Assignments which are submitted by the Professor.

IDEA!!!!! –– Student access logs. A MUST.


=Student Topics Tab=

Master:
 - Lists each Topic.

Detail:
 - Expands in situ to show each Topic's body text.
 - Lists all attachments for that Topic.
 - Lists each Assignment for that Topic.


=Student Assignments Tab=

Master: 
- Lists all Assignments.
- Hilights which ones are open, in-progress, late, missing, and graded.

Detail: 
- Lists all attachments for that Assignment.
- Allows student to create/continue/submit a Submission.


=Student Grades Tab=

 - Lists all Grades, broken down by category & weight and estimates current grade.


=Professor Topics Tab=

Master:
 - Lists each Topic with an editing interface.

Detail:
 - Create/Edit/Remove individual Topics.
 - Create/Edit/Remove attachments for individual Topics.
 - Create/Edit/Remove Assignments for each Topic.


=Professor Assignments Tab=

Master: 
- Lists all Assignments.
- Hilights which ones are open, in-progress, late, missing, and graded.

Detail: 
- Lists all attachments for that Assignment.
- Allows professor to begin grading Submissions.

Hybrid:
- Assignment sheet mode, listing each Submission for that Assignment with attachments inline and grading fields.

=Student Grades Tab=

 - Lists all Grades, broken down by category & weight and estimates current grade.


*/


/**
 * This plugin will only initialize if BuddyPress is active.
 */
add_action( 'bp_include', array('CISY','init') );


/**
 * CISY Class houses all of the plugin code.
 */
class CISY {


/**
 * The initialization function sets up everything. 
 */
public static function init() {
	
	//Register post types
	add_action( 'init', array(get_called_class(),'register_post_types') );
	
	
	//Restrict email registration domains (THIS IS SPARTA!)
	add_action('registration_errors', array(get_called_class(),'restrict_domains'), 10, 3);
	
	
	//Set up students' topics tab
	add_action( 'wp', array(get_called_class(),'topics_tab'));
	
	//Set up students' assignments tab
	add_action( 'wp', array(get_called_class(),'assignments_tab'));
	
	//Set up students' grades tab
	add_action( 'wp', array(get_called_class(),'grades_tab'));
	
	
	//Set up professor's topics tab
	add_action( 'wp', array(get_called_class(),'topics_admin_tab'));
	
	//Set up professor's assignments tab
	add_action( 'wp', array(get_called_class(),'assignments_admin_tab'));
	
	//Set up professor's grades tab
	add_action( 'wp', array(get_called_class(),'grades_admin_tab'));
	
	//Set up professor's student log tab
	//add_action( 'wp', array(get_called_class(),'student_admin_tab'));
	
}


/**
 * Register all of the required post types:
 *	- Topic (houses daily/weekly topics on each class group; determines their weight)
 *	- Assignment (linked to a topic, these allow students to submit assignments)
 *	- Submission (the students' submissions)
 *	- Grade (the graded submission data)
 */
function register_post_types() {
  
  //Topics
  $labels = array(
    'name'               => _x( 'Topics', 'post type general name' ),
    'singular_name'      => _x( 'Topic', 'post type singular name' ),
    'add_new'            => _x( 'Add New', 'topic' ),
    'add_new_item'       => __( 'Add New Topic' ),
    'edit_item'          => __( 'Edit Topic' ),
    'new_item'           => __( 'New Topic' ),
    'all_items'          => __( 'All Topics' ),
    'view_item'          => __( 'View Topic' ),
    'search_items'       => __( 'Search Topics' ),
    'not_found'          => __( 'No topics found' ),
    'not_found_in_trash' => __( 'No topics found in the Trash' ), 
    'parent_item_colon'  => '',
    'menu_name'          => 'Topics'
  );
  $args = array(
    'labels'        => $labels,
    'description'   => 'Holds class topics.',
    'public'        => true,
    'publicly_queryable' => true,
    'supports'      => array( 'title', 
    						  'author',
    						  'comments', 
    						  'revisions', 
    						  'editor', 
    						  'custom-fields'),
    'has_archive'   => true,
    'capabilities' => array(
        'publish_posts' => 'manage_options',
        'edit_posts' => 'manage_options',
        'edit_others_posts' => 'manage_options',
        'delete_posts' => 'manage_options',
        'delete_others_posts' => 'manage_options',
        'read_private_posts' => 'manage_options',
        'edit_post' => 'manage_options',
        'delete_post' => 'manage_options',
        'read_post' => 'manage_options',
    ),
    'hierarchical' => true,
    'menu_position' => 10,
    'show_ui' => true,
  );
  register_post_type( 'topic', $args );
  
  
  //Assignments
  $labels = array(
    'name'               => _x( 'Assignments', 'post type general name' ),
    'singular_name'      => _x( 'Assignment', 'post type singular name' ),
    'add_new'            => _x( 'Add New', 'assignment' ),
    'add_new_item'       => __( 'Add New Assignment' ),
    'edit_item'          => __( 'Edit Assignment' ),
    'new_item'           => __( 'New Assignment' ),
    'all_items'          => __( 'All Assignments' ),
    'view_item'          => __( 'View Assignment' ),
    'search_items'       => __( 'Search Assignments' ),
    'not_found'          => __( 'No assignments found' ),
    'not_found_in_trash' => __( 'No assignments found in the Trash' ), 
    'parent_item_colon'  => '',
    'menu_name'          => 'Assignments'
  );
  $args = array(
    'labels'        => $labels,
    'description'   => 'Holds assignments.',
    'public'        => true,
    'publicly_queryable' => true,
    'supports'      => array( 'title', 
    						  'author',
    						  'comments', 
    						  'revisions', 
    						  'editor', 
    						  'custom-fields'),
    'has_archive'   => true,
    'capabilities' => array(
        'publish_posts' => 'manage_options',
        'edit_posts' => 'manage_options',
        'edit_others_posts' => 'manage_options',
        'delete_posts' => 'manage_options',
        'delete_others_posts' => 'manage_options',
        'read_private_posts' => 'manage_options',
        'edit_post' => 'manage_options',
        'delete_post' => 'manage_options',
        'read_post' => 'manage_options',
    ),
    'hierarchical' => false,
    'menu_position' => 10,
    'show_ui' => true,
  );
  register_post_type( 'assignment', $args );
  
  
  //Submission
  $labels = array(
    'name'               => _x( 'Submissions', 'post type general name' ),
    'singular_name'      => _x( 'Submission', 'post type singular name' ),
    'add_new'            => _x( 'Add New', 'submission' ),
    'add_new_item'       => __( 'Add New Submission' ),
    'edit_item'          => __( 'Edit Submission' ),
    'new_item'           => __( 'New Submission' ),
    'all_items'          => __( 'All Submissions' ),
    'view_item'          => __( 'View Submission' ),
    'search_items'       => __( 'Search Submissions' ),
    'not_found'          => __( 'No submissions found' ),
    'not_found_in_trash' => __( 'No submissions found in the Trash' ), 
    'parent_item_colon'  => '',
    'menu_name'          => 'Submissions'
  );
  $args = array(
    'labels'        => $labels,
    'description'   => 'Holds student submissions.',
    'public'        => true,
    'publicly_queryable' => true,
    'supports'      => array( 'title', 
    						  'author',
    						  'comments', 
    						  'revisions', 
    						  'editor', 
    						  'custom-fields'),
    'has_archive'   => true,
    'capabilities' => array(
        'publish_posts' => 'manage_options',
        'edit_posts' => 'manage_options',
        'edit_others_posts' => 'manage_options',
        'delete_posts' => 'manage_options',
        'delete_others_posts' => 'manage_options',
        'read_private_posts' => 'manage_options',
        'edit_post' => 'manage_options',
        'delete_post' => 'manage_options',
        'read_post' => 'manage_options',
    ),
    'hierarchical' => false,
    'menu_position' => 10,
    'show_ui' => true,
  );
  register_post_type( 'submission', $args );
  
  
  $labels = array(
    'name'               => _x( 'Grades', 'post type general name' ),
    'singular_name'      => _x( 'Grade', 'post type singular name' ),
    'add_new'            => _x( 'Add New', 'book' ),
    'add_new_item'       => __( 'Add New Grade' ),
    'edit_item'          => __( 'Edit Grade' ),
    'new_item'           => __( 'New Grade' ),
    'all_items'          => __( 'All Grades' ),
    'view_item'          => __( 'View Grade' ),
    'search_items'       => __( 'Search Grades' ),
    'not_found'          => __( 'No grades found' ),
    'not_found_in_trash' => __( 'No grades found in the Trash' ), 
    'parent_item_colon'  => '',
    'menu_name'          => 'Grades'
  );
  $args = array(
    'labels'        => $labels,
    'description'   => 'Holds student grades.',
    'public'        => false,
    'publicly_queryable' => false,
    'menu_position' => 5,
    'supports'      => array( 'title', 'editor', 'custom-fields'),
    'has_archive'   => false,
    'capabilities' => array(
        'publish_posts' => 'manage_options',
        'edit_posts' => 'manage_options',
        'edit_others_posts' => 'manage_options',
        'delete_posts' => 'manage_options',
        'delete_others_posts' => 'manage_options',
        'read_private_posts' => 'manage_options',
        'edit_post' => 'manage_options',
        'delete_post' => 'manage_options',
        'read_post' => 'manage_options',
    ),
    'hierarchical' => false,
    'menu_position' => 10,
    'show_ui' => true,
  );
  register_post_type( 'grade', $args );
  
  
}//END function register_post_types


/**
 * Prevent students from using personal email accounts.
 */
function restrict_domains( $errors, $login, $email ) {
	
	$whitelist = array(	'raritanval.edu',
						'stu.raritanval.edu'
	);
	
	if ( is_email($email) ) {

		$parts = explode('@', $email);

		$domain = $parts[count($parts)-1];

		if ( !in_array(strtolower($domain), $whitelist) ) {

			$errors->add('email_domain', __('ERROR: You may ONLY register with an @raritanval.edu or @stu.raritanval.edu email address. No exceptions. THIS IS SPARTA!'));

		}

	}

	return $errors;
	
}//END function restrict_domains


/**
 * Set up students' Topics tab.
 */
function topics_tab() {

	
}//END function topics_tab


/**
 * Set up students' Assignments tab.
 */
function assignments_tab() {

	
}//END function assignments_tab
 
 
/**
 * Set up students' Grades tab.
 */
function grades_tab() {

	
}//END function grades_tab


/**
 * Set up professor's Topics tab.
 */
function topics_admin_tab() {
	
	global $bp;
	
	//If the user is not a group administrator, return.
	if (groups_is_user_admin( get_current_user_id(), $bp->groups->current_group->id )) return;
	
	//Calculate the group link.
	//$groups_link = $bp->root_domain . '/' . $bp->groups->slug . '/' . $bp->groups->current_group->slug . '/';
	
	//Add in the new subnav item to the group.
	bp_core_new_subnav_item( array(
		'name' => 'Topics',
		'slug' => 'topics',
		'parent_slug' => $bp->groups->current_group->slug,
		'parent_url' => bp_get_group_permalink( $bp->groups->current_group ),
		'screen_function' => array(get_called_class(),'topics_admin_tab_template'),
		'position' => 1001 ) 
	);

}//END function topics_admin_tab

/**
 * Display the professor's Topics tab.
 */
function topics_admin_tab_template() {
	
	//Hook in the title
	add_action( 'bp_template_title', array(get_called_class(),'topics_admin_tab_title') );
	//Hook in the content
	add_action( 'bp_template_content', array(get_called_class(),'topics_admin_tab_content') );
	
	//Nab the template
	$templates = array('groups/single/plugins.php','plugin-template.php');
	
	//Load the template and fire the hooks.
	if( strstr( locate_template($templates), 'groups/single/plugins.php' ) ) {
		bp_core_load_template( apply_filters( 'bp_core_template_plugin', 'groups/single/plugins' ) );
	} else {
		bp_core_load_template( apply_filters( 'bp_core_template_plugin', 'plugin-template' ) );
	}
}

/**
 * Print the tab title.
 */
function topics_admin_tab_title() {

	echo 'Topics';

}

/**
 * Print the tab content.
 */
function topics_admin_tab_content() {
	
	global $bp;
	
	echo 'This is the professor\'s topics tab.';

}


/**
 * Set up professor's Assignments tab.
 */
function assignments_admin_tab() {


}//END function assignments_admin_tab
 
 
/**
 * Set up professor's Grades tab.
 */
function grades_admin_tab() {

	
}//END function grades_admin_tab


}//END class CISY


?>