Sensei_Analysis_Overview_List_Table

Complexity

Total Complexity

77

Size/Duplication

Total Lines	688
Duplicated Lines	24.56 %

Coupling/Cohesion

Components	1
Dependencies	7

14 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	12	2
B	get_columns()	27	39	4
B	get_sortable_columns()	18	39	4
C	prepare_items()	17	61	11
D	generate_report()	17	62	12
D	get_row_data()	15	179	17
B	get_courses()	25	25	3
B	get_lessons()	24	24	3
B	get_learners()	0	24	2
A	stats_boxes()	0	49	3
A	no_items()	0	8	3
B	data_table_header()	8	39	5
A	data_table_footer()	0	18	4
A	search_button()	18	18	4

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 12 and the first side effect is on line 2.

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

/**
 * Analysis Overview Data Table.
 *
 * @package Analytics
 * @author Automattic
 *
 * @since 1.2.0
 */
class Sensei_Analysis_Overview_List_Table extends WooThemes_Sensei_List_Table {
	public $type;
	public $page_slug = 'sensei_analysis';

	/**
	 * Constructor
	 * @since  1.2.0
	 * @return  void

Adding a @return annotation to constructors is generally not recommended as a constructor does not have a meaningful return value.

	 */
	public function __construct ( $type = 'users' ) {
		$this->type = in_array( $type, array( 'courses', 'lessons', 'users' ) ) ? $type : 'users';

		// Load Parent token into constructor
		parent::__construct( 'analysis_overview' );

		// Actions
		add_action( 'sensei_before_list_table', array( $this, 'data_table_header' ) );
		add_action( 'sensei_after_list_table', array( $this, 'data_table_footer' ) );

		add_filter( 'sensei_list_table_search_button_text', array( $this, 'search_button' ) );
	} // End __construct()

	/**
	 * Define the columns that are going to be used in the table
	 * @since  1.7.0
	 * @return array $columns, the array of columns to use with the table
	 */
	function get_columns() {

It is generally recommended to explicitly declare the visibility for methods.

		switch( $this->type ) {
			case 'courses':

This code seems to be duplicated across your project.

				$columns = array(
					'title' => __( 'Course', 'woothemes-sensei' ),
					'students' => __( 'Learners', 'woothemes-sensei' ),
					'lessons' => __( 'Lessons', 'woothemes-sensei' ),
					'completions' => __( 'Completed', 'woothemes-sensei' ),
					'average_percent' => __( 'Average Percentage', 'woothemes-sensei' ),
				);
				break;

			case 'lessons':

This code seems to be duplicated across your project.

				$columns = array(
					'title' => __( 'Lesson', 'woothemes-sensei' ),
					'course' => __( 'Course', 'woothemes-sensei' ),
					'students' => __( 'Learners', 'woothemes-sensei' ),
					'completions' => __( 'Completed', 'woothemes-sensei' ),
					'average_grade' => __( 'Average Grade', 'woothemes-sensei' ),
				);
				break;

			case 'users':
			default:

This code seems to be duplicated across your project.

				$columns = array(
					'title' => __( 'Learner', 'woothemes-sensei' ),
					'registered' => __( 'Date Registered', 'woothemes-sensei' ),
					'active_courses' => __( 'Active Courses', 'woothemes-sensei' ),
					'completed_courses' => __( 'Completed Courses', 'woothemes-sensei' ),
					'average_grade' => __( 'Average Grade', 'woothemes-sensei' ),
				);
				break;
		}
		// Backwards compatible filter name, moving forward should have single filter name
		$columns = apply_filters( 'sensei_analysis_overview_' . $this->type . '_columns', $columns, $this );
		$columns = apply_filters( 'sensei_analysis_overview_columns', $columns, $this );
		return $columns;
	}

	/**
	 * Define the columns that are going to be used in the table
	 * @since  1.7.0
	 * @return array $columns, the array of columns to use with the table
	 */
	function get_sortable_columns() {

It is generally recommended to explicitly declare the visibility for methods.

		switch( $this->type ) {
			case 'courses':

This code seems to be duplicated across your project.

				$columns = array(
					'title' => array( 'title', false ),
					'students' => array( 'students', false ),
					'lessons' => array( 'lessons', false ),
					'completions' => array( 'completions', false ),
					'average_percent' => array( 'average_percent', false ),
				);
				break;

			case 'lessons':

This code seems to be duplicated across your project.

				$columns = array(
					'title' => array( 'title', false ),
					'course' => array( 'course', false ),
					'students' => array( 'students', false ),
					'completions' => array( 'completions', false ),
					'average_grade' => array( 'average_grade', false ),
				);
				break;

			case 'users':
			default:
				$columns = array(
					'title' => array( 'user_login', false ),
					'registered' => array( 'registered', false ),
					'active_courses' => array( 'active_courses', false ),
					'completed_courses' => array( 'completed_courses', false ),
					'average_grade' => array( 'average_grade', false )
				);
				break;
		}
		// Backwards compatible filter name, moving forward should have single filter name
		$columns = apply_filters( 'sensei_analysis_overview_' . $this->type . '_columns_sortable', $columns, $this );
		$columns = apply_filters( 'sensei_analysis_overview_columns_sortable', $columns, $this );
		return $columns;
	}

	/**
	 * Prepare the table with different parameters, pagination, columns and table elements
	 * @since  1.7.0
	 * @return void
	 */
	public function prepare_items() {
		global $per_page;

		// Handle orderby
		$orderby = '';
		if ( !empty( $_GET['orderby'] ) ) {
			if ( array_key_exists( esc_html( $_GET['orderby'] ), $this->get_sortable_columns() ) ) {
				$orderby = esc_html( $_GET['orderby'] );
			} // End If Statement
		}

		// Handle order
		$order = 'ASC';
		if ( !empty( $_GET['order'] ) ) {
			$order = ( 'ASC' == strtoupper($_GET['order']) ) ? 'ASC' : 'DESC';
		}

		$per_page = $this->get_items_per_page( 'sensei_comments_per_page' );
		$per_page = apply_filters( 'sensei_comments_per_page', $per_page, 'sensei_comments' );

		$paged = $this->get_pagenum();
		$offset = 0;
		if ( !empty($paged) ) {
			$offset = $per_page * ( $paged - 1 );
		} // End If Statement

		$args = array(
			'number' => $per_page,
			'offset' => $offset,
			'orderby' => $orderby,
			'order' => $order,
		);

        // Handle search
        if ( isset( $_GET['s'] ) && !empty( $_GET['s'] ) ) {

This code seems to be duplicated across your project.

            $args['search'] = esc_html( $_GET['s'] );
        }

		switch ( $this->type ) {

This code seems to be duplicated across your project.

			case 'courses':
				$this->items = $this->get_courses( $args );
				break;

			case 'lessons':
				$this->items = $this->get_lessons( $args );
				break;

			case 'users':
			default :
				$this->items = $this->get_learners( $args );
				break;
		}

		$total_items = $this->total_items;
		$total_pages = ceil( $total_items / $per_page );
		$this->set_pagination_args( array(
			'total_items' => $total_items,
			'total_pages' => $total_pages,
			'per_page' => $per_page
		) );
	}

	/**
	 * Generate a csv report with different parameters, pagination, columns and table elements
	 * @since  1.7.0
	 * @return data
	 */
	public function generate_report( $report ) {

		$data = array();

		$this->csv_output = true;

		// Handle orderby
		$orderby = '';
		if ( !empty( $_GET['orderby'] ) ) {
			if ( array_key_exists( esc_html( $_GET['orderby'] ), $this->get_sortable_columns() ) ) {
				$orderby = esc_html( $_GET['orderby'] );
			} // End If Statement
		}

		// Handle order
		$order = 'ASC';
		if ( !empty( $_GET['order'] ) ) {
			$order = ( 'ASC' == strtoupper($_GET['order']) ) ? 'ASC' : 'DESC';
		}

		$args = array(
			'orderby' => $orderby,
			'order' => $order,
		);


        // Handle search
        if ( isset( $_GET['s'] ) && !empty( $_GET['s'] ) ) {

This code seems to be duplicated across your project.

            $args['search'] = esc_html( $_GET['s'] );
        }


		// Start the csv with the column headings
		$column_headers = array();
		$columns = $this->get_columns();
		foreach( $columns AS $key => $title ) {
			$column_headers[] = $title;
		}
		$data[] = $column_headers;

		switch ( $this->type ) {

This code seems to be duplicated across your project.

			case 'courses':
				$this->items = $this->get_courses( $args );
				break;

			case 'lessons':
				$this->items = $this->get_lessons( $args );
				break;

			case 'users':
			default :
				$this->items = $this->get_learners( $args );
				break;
		}

		// Process each row
		foreach( $this->items AS $item) {
			$data[] = $this->get_row_data( $item );
		}

		return $data;
	}

	/**
	 * Generates the overall array for a single item in the display
	 * @since  1.7.0
	 * @param object $item The current item
     * @return array $column_data;
	 */
	protected function get_row_data( $item ) {

		switch( $this->type ) {
			case 'courses' :
				// Get Learners (i.e. those who have started)
				$course_args = array( 
						'post_id' => $item->ID,
						'type' => 'sensei_course_status',
						'status' => 'any',
					);
				$course_students = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_course_learners', $course_args, $item ) );

				// Get Course Completions
				$course_args = array( 
						'post_id' => $item->ID,
						'type' => 'sensei_course_status',
						'status' => 'complete',
					);
				$course_completions = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_course_completions', $course_args, $item ) );

				// Course Lessons
				$course_lessons = Sensei()->lesson->lesson_count( array('publish', 'private'), $item->ID );

array('publish', 'private') is of type array<integer,string,{"0":"string","1":"string"}>, but the function expects a string.

				// Get Percent Complete
				$grade_args = array( 
						'post_id' => $item->ID,
						'type' => 'sensei_course_status',
						'status' => 'any',
						'meta_key' => 'percent',
					);

				$percent_count = count( Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_course_percentage', $grade_args, $item ), true ) );
				$percent_total = Sensei_Grading::get_course_users_grades_sum( $item->ID );

                $course_average_percent = 0;
                if( $percent_count > 0 && $percent_total > 0 ){
                    $course_average_percent = abs( round( doubleval( $percent_total / $percent_count ), 2 ) );
                }


				// Output course data
				if ( $this->csv_output ) {

This code seems to be duplicated across your project.

					$course_title = apply_filters( 'the_title', $item->post_title, $item->ID );
				}
				else {
					$url = add_query_arg( array( 'page' => $this->page_slug, 'course_id' => $item->ID ), admin_url( 'admin.php' ) );

					$course_title = '<strong><a class="row-title" href="' . esc_url( $url ) . '">' . apply_filters( 'the_title', $item->post_title, $item->ID ) . '</a></strong>';
					$course_average_percent .= '%';
				} // End If Statement
				$column_data = apply_filters( 'sensei_analysis_overview_column_data', array( 'title' => $course_title,
												'students' => $course_students,
												'lessons' => $course_lessons,
												'completions' => $course_completions,
												'average_percent' => $course_average_percent,
											), $item, $this );
				break;

			case 'lessons' :
				// Get Learners (i.e. those who have started)
				$lesson_args = array( 
						'post_id' => $item->ID,
						'type' => 'sensei_lesson_status',
						'status' => 'any',
					);
				$lesson_students = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_lesson_learners', $lesson_args, $item ) );

				// Get Course Completions
				$lesson_args = array( 
						'post_id' => $item->ID,
						'type' => 'sensei_lesson_status',
						'status' => array( 'complete', 'graded', 'passed', 'failed' ),
						'count' => true,
					);
				$lesson_completions = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_lesson_completions', $lesson_args, $item ) );

				// Course 
				$course_id = get_post_meta( $item->ID, '_lesson_course', true );
				$course_title = $course_id ? get_the_title( $course_id ) : '';

				$lesson_average_grade = __('n/a', 'woothemes-sensei');
				if ( false != get_post_meta($item->ID, '_quiz_has_questions', true) ) {
					// Get Percent Complete
					$grade_args = array( 
							'post_id' => $item->ID,
							'type' => 'sensei_lesson_status',
							'status' => array( 'graded', 'passed', 'failed' ),
							'meta_key' => 'grade',
						);

					$grade_count = count( Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_lesson_grades', $grade_args, $item ), true ));
					$grade_total = Sensei_Grading::get_lessons_users_grades_sum( $item->ID );

                    $lesson_average_grade = 0;
                    if( $grade_total > 0 && $grade_count > 0 ){

This code seems to be duplicated across your project.

                        $lesson_average_grade = abs( round( doubleval( $grade_total / $grade_count ), 2 ) );
                    }

                }
				// Output lesson data
				if ( $this->csv_output ) {
					$lesson_title = apply_filters( 'the_title', $item->post_title, $item->ID );
				}
				else {
					$url = add_query_arg( array( 'page' => $this->page_slug, 'lesson_id' => $item->ID ), admin_url( 'admin.php' ) );
					$lesson_title = '<strong><a class="row-title" href="' . esc_url( $url ) . '">' . apply_filters( 'the_title', $item->post_title, $item->ID ) . '</a></strong>';

					if ( $course_id ) {
						$url = add_query_arg( array( 'page' => $this->page_slug, 'course_id' => $course_id ), admin_url( 'admin.php' ) );
						$course_title = '<a href="' . esc_url( $url ) . '">' . $course_title . '</a>';
					}
					else {
						$course_title = __('n/a', 'woothemes-sensei');
					}
					if ( is_numeric( $lesson_average_grade ) ) {
						$lesson_average_grade .= '%';
					}
				} // End If Statement
				$column_data = apply_filters( 'sensei_analysis_overview_column_data', array( 'title' => $lesson_title,
												'course' => $course_title,
												'students' => $lesson_students,
												'completions' => $lesson_completions,
												'average_grade' => $lesson_average_grade,
											), $item, $this );
				break;

			case 'users' :
			default:
				// Get Started Courses
				$course_args = array( 
						'user_id' => $item->ID,
						'type' => 'sensei_course_status',
						'status' => 'any',
					);
				$user_courses_started = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_user_courses_started', $course_args, $item ) );

				// Get Completed Courses
				$course_args = array( 
						'user_id' => $item->ID,
						'type' => 'sensei_course_status',
						'status' => 'complete',
					);
				$user_courses_ended = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_user_courses_ended', $course_args, $item ) );

				// Get Quiz Grades
				$grade_args = array( 
						'user_id' => $item->ID,
						'type' => 'sensei_lesson_status',
						'status' => 'any',
						'meta_key' => 'grade',
					);

				$grade_count = count( Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_user_lesson_grades', $grade_args, $item ), true ));
				$grade_total = Sensei_Grading::get_user_graded_lessons_sum( $item->ID );

                $user_average_grade = 0;
                if( $grade_total > 0 && $grade_count > 0 ){

This code seems to be duplicated across your project.

                    $user_average_grade = abs( round( doubleval( $grade_total / $grade_count ), 2 ) );
                }

				// Output the users data
				if ( $this->csv_output ) {
                    $user_name = Sensei_Learner::get_full_name( $item->ID );
                }
				else {
					$url = add_query_arg( array( 'page' => $this->page_slug, 'user_id' => $item->ID ), admin_url( 'admin.php' ) );
					$user_name = '<strong><a class="row-title" href="' . esc_url( $url ) . '">' . $item->display_name . '</a></strong>';
					$user_average_grade .= '%';
				} // End If Statement
				$column_data = apply_filters( 'sensei_analysis_overview_column_data', array( 'title' => $user_name,
												'registered' => $item->user_registered,
												'active_courses' => ( $user_courses_started - $user_courses_ended ),
												'completed_courses' => $user_courses_ended,
												'average_grade' => $user_average_grade,
											), $item, $this );
				break;
		} // end switch
		return $column_data;
	}

	/**
	 * Return array of course
	 * @since  1.7.0
	 * @return array courses
	 */
	private function get_courses( $args ) {

This method seems to be duplicated in your project.

		$course_args = array(
			'post_type' => 'course',
			'post_status' => array('publish', 'private'),
			'posts_per_page' => $args['number'],
			'offset' => $args['offset'],
			'orderby' => $args['orderby'],
			'order' => $args['order'],
			'suppress_filters' => 0,
		);

		if ( $this->csv_output ) {
			$course_args['posts_per_page'] = '-1';
		}

		if( isset( $args['search'] ) ) {
			$course_args['s'] = $args['search'];
		}

		// Using WP_Query as get_posts() doesn't support 'found_posts'
		$courses_query = new WP_Query( apply_filters( 'sensei_analysis_overview_filter_courses', $course_args ) );
		$this->total_items = $courses_query->found_posts;
		return $courses_query->posts;

	} // End get_courses()

	/**
	 * Return array of lessons
	 * @since  1.7.0
	 * @return array lessons
	 */
	private function get_lessons( $args ) {

This method seems to be duplicated in your project.

		$lessons_args = array(
			'post_type' => 'lesson',
			'post_status' => array('publish', 'private'),
			'posts_per_page' => $args['number'],
			'offset' => $args['offset'],
			'orderby' => $args['orderby'],
			'order' => $args['order'],
			'suppress_filters' => 0,
		);

		if ( $this->csv_output ) {
			$lessons_args['posts_per_page'] = '-1';
		}

		if( isset( $args['search'] ) ) {
			$lessons_args['s'] = $args['search'];
		}

		// Using WP_Query as get_posts() doesn't support 'found_posts'
		$lessons_query = new WP_Query( apply_filters( 'sensei_analysis_overview_filter_lessons', $lessons_args ) );
		$this->total_items = $lessons_query->found_posts;
		return $lessons_query->posts;
	} // End get_lessons()

	/**
	 * Return array of learners
	 * @since  1.7.0
	 * @return array learners
	 */
	private function get_learners( $args ) {

		if ( !empty($args['search']) ) {
			$args = array(
				'search' => '*' . trim( $args['search'], '*' ) . '*',
			);
		}

		// This stops the full meta data of each user being loaded
		$args['fields'] = array( 'ID', 'user_login', 'user_email', 'user_registered', 'display_name' );

        /**
         * Filter the WP_User_Query arguments
         * @since 1.6.0
         * @param $args
         */
        $args = apply_filters( 'sensei_analysis_overview_filter_users', $args );
		$wp_user_search = new WP_User_Query( $args );
        $learners = $wp_user_search->get_results();
		$this->total_items = $wp_user_search->get_total();

        return $learners;

	} // End get_learners()

	/**
	 * Sets the stats boxes to render
	 * @since  1.2.0
	 * @return array $stats_to_render of stats boxes and values
	 */
	public function stats_boxes () {

		// Get the data required
		$user_count = count_users();
		$user_count = apply_filters( 'sensei_analysis_total_users', $user_count['total_users'], $user_count );
		$total_courses = Sensei()->course->course_count( array('publish', 'private') );

array('publish', 'private') is of type array<integer,string,{"0":"string","1":"string"}>, but the function expects a string.

		$total_lessons = Sensei()->lesson->lesson_count( array('publish', 'private') );

array('publish', 'private') is of type array<integer,string,{"0":"string","1":"string"}>, but the function expects a string.

        /**
         * filter the analysis tot grades query args
         */
		$grade_args = apply_filters( 'sensei_analysis_total_quiz_grades', array(

$grade_args is not used, you could remove the assignment.

				'type' => 'sensei_lesson_status',
				'status' => 'any',

                'meta_key' => 'grade'
        ));

		$total_grade_count = Sensei_Grading::get_graded_lessons_count();
		$total_grade_total = Sensei_Grading::get_graded_lessons_sum();
		$total_average_grade = 0;
		if( $total_grade_total > 0 &&  $total_grade_count >0   ){
			$total_average_grade = abs( round( doubleval( $total_grade_total / $total_grade_count ), 2 ) );
		}


		$course_args = array( 
				'type' => 'sensei_course_status',
				'status' => 'any',
			);
		$total_courses_started = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_total_courses_started', $course_args ) );
		$course_args = array( 
				'type' => 'sensei_course_status',
				'status' => 'complete',
			);
		$total_courses_ended = Sensei_Utils::sensei_check_for_activity( apply_filters( 'sensei_analysis_total_courses_ended', $course_args ) );
		$average_courses_per_learner = abs( round( doubleval( $total_courses_started / $user_count ), 2 ) );

		// Setup the boxes to render
		$stats_to_render = array( 
								__( 'Total Courses', 'woothemes-sensei' ) => $total_courses,
								__( 'Total Lessons', 'woothemes-sensei' ) => $total_lessons,
								__( 'Total Learners', 'woothemes-sensei' ) => $user_count,
								__( 'Average Courses per Learner', 'woothemes-sensei' ) => $average_courses_per_learner,
								__( 'Average Grade', 'woothemes-sensei' ) => $total_average_grade . '%',
								__( 'Total Completed Courses', 'woothemes-sensei' ) => $total_courses_ended,
							);
		return apply_filters( 'sensei_analysis_stats_boxes', $stats_to_render );
	} // End stats_boxes()

	/**
	 * Sets output when no items are found
	 * Overloads the parent method
	 * @since  1.2.0
	 * @return void
	 */
	public function no_items() {
		if( ! $this->view || 'users' == $this->view ) {
			$type = 'learners';
		} else {
			$type = $this->view;
		}
		echo  sprintf( __( '%1$sNo %2$s found%3$s', 'woothemes-sensei' ), '<em>', $type, '</em>' );
	} // End no_items()

	/**
	 * Output for table heading
	 * @since  1.2.0
	 * @return void
	 */
	public function data_table_header() {
		$menu = array();

		$query_args = array(
			'page' => $this->page_slug,
		);
		$learners_class = $courses_class = $lessons_class = '';
		switch( $this->type ) {
			case 'courses':
				$courses_class = 'current';
				break;

			case 'lessons':
				$lessons_class = 'current';
				break;

			default:
				$learners_class = 'current';
				break;
		}
		$learner_args = $lesson_args = $courses_args = $query_args;
		$learner_args['view'] = 'users';
		$lesson_args['view'] = 'lessons';
		$courses_args['view'] = 'courses';

		$menu['learners'] = '<a class="' . $learners_class . '" href="' . esc_url( add_query_arg( $learner_args, admin_url( 'admin.php' ) ) ). '">' . __( 'Learners', 'woothemes-sensei' ) . '</a>';
		$menu['courses'] = '<a class="' . $courses_class . '" href="' . esc_url ( add_query_arg( $courses_args, admin_url( 'admin.php' ) ) ) . '">' . __( 'Courses', 'woothemes-sensei' ) . '</a>';
		$menu['lessons'] = '<a class="' . $lessons_class . '" href="' . esc_url( add_query_arg( $lesson_args, admin_url( 'admin.php' ) ) ) . '">' . __( 'Lessons', 'woothemes-sensei' ) . '</a>';

		$menu = apply_filters( 'sensei_analysis_overview_sub_menu', $menu );
		if ( !empty($menu) ) {

This code seems to be duplicated across your project.

			echo '<ul class="subsubsub">' . "\n";
			foreach ( $menu as $class => $item ) {
				$menu[ $class ] = "\t<li class='$class'>$item";
			}
			echo implode( " |</li>\n", $menu ) . "</li>\n";
			echo '</ul>' . "\n";
		}
	} // End data_table_header()

	/**
	 * Output for table footer
	 * @since  1.7.0
	 * @return void
	 */
	public function data_table_footer() {
		switch ( $this->type ) {
			case 'courses':
				$report = 'courses-overview';
				break;

			case 'lessons':
				$report = 'lessons-overview';
				break;

			case 'users':
			default :
				$report = 'user-overview';
			break;
		} // End Switch Statement
		$url = add_query_arg( array( 'page' => $this->page_slug, 'view' => $this->type, 'sensei_report_download' => $report ), admin_url( 'admin.php' ) );
		echo '<a class="button button-primary" href="' . esc_url( wp_nonce_url( $url, 'sensei_csv_download-' . $report, '_sdl_nonce' ) ) . '">' . __( 'Export all rows (CSV)', 'woothemes-sensei' ) . '</a>';
	} // End data_table_footer()

	/**
	 * The text for the search button
	 * @since  1.7.0
	 * @return string $text
	 */
	public function search_button( $text = '' ) {

This method seems to be duplicated in your project.

		switch( $this->type ) {
			case 'courses':
				$text = __( 'Search Courses', 'woothemes-sensei' );
			break;

			case 'lessons':
				$text = __( 'Search Lessons', 'woothemes-sensei' );
			break;

			case 'users':
			default:
				$text = __( 'Search Learners', 'woothemes-sensei' );
			break;
		} // End Switch Statement

		return $text;
	}

} // End Class

/**
 * Class WooThemes_Sensei_Analysis_Overview_List_Table
 * @ignore only for backward compatibility
 * @since 1.9.0
 */
class WooThemes_Sensei_Analysis_Overview_List_Table extends Sensei_Analysis_Overview_List_Table {}