woothemes / sensei

includes/class-sensei-settings-api.php

<?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

/**
 * A settings API (wrapping the WordPress Settings API).
 *
 * @package Core
 * @author Automattic
 *
 * @since 1.0.0
 */
class Sensei_Settings_API {

	public $token;
	public $page_slug;
	public $name;
	public $menu_label;
	public $settings;
	public $sections;
	public $fields;
	public $errors;

	public $has_range;
	public $has_imageselector;
	public $has_tabs;
	private $tabs;
	public $settings_version;

	/**
	 * Constructor.
	 * @access public
	 * @since  1.0.0
	 */
	public function __construct () {

		$this->token = 'woothemes-sensei-settings';
		$this->page_slug = 'woothemes-sensei-settings-api';

		$this->sections = array();
		$this->fields = array();
		$this->remaining_fields = array();
		$this->errors = array();

		$this->has_range = false;
		$this->has_imageselector = false;
		$this->has_tabs = false;
		$this->tabs = array();
		$this->settings_version = '';

	} // End __construct()

	/**
	 * Setup the settings screen and necessary functions.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function register_hook_listener() {

        add_action( 'admin_menu', array( $this, 'register_settings_screen' ), 60 );
		add_action( 'admin_init', array( $this, 'settings_fields' ) );
        add_action( 'init', array( $this, 'general_init' ), 5 );

	} // End setup_settings()

	/**
	 * Initialise settings sections, settings fields and create tabs, if applicable.
	 * @access  public
	 * @since   1.0.3
	 * @return  void
	 */
	public function general_init() {
		$this->init_sections();
		$this->init_fields();
		$this->get_settings();
		if ( $this->has_tabs == true ) {

It seems like you are loosely comparing two booleans. Considering using the strict comparison === instead.

			$this->create_tabs();
		} // End If Statement
	} // End general_init()

	/**
	 * Register the settings sections.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function init_sections () {
		// Override this function in your class and assign the array of sections to $this->sections.
		_e( 'Override init_sections() in your class.', 'woothemes-sensei' );
	} // End init_sections()

	/**
	 * Register the settings fields.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function init_fields () {
		// Override this function in your class and assign the array of sections to $this->fields.
		_e( 'Override init_fields() in your class.', 'woothemes-sensei' );
	} // End init_fields()

	/**
	 * Construct and output HTML markup for the settings tabs.
	 * @access public
	 * @since  1.1.0
	 * @return void
	 */
	public function settings_tabs () {

		if ( ! $this->has_tabs ) { return; }

		if ( count( $this->tabs ) > 0 ) {
			$html = '';

			$html .= '<ul id="settings-sections" class="subsubsub hide-if-no-js">' . "\n";

			$sections = array(
						'all' => array( 'href' => '#all', 'name' => __( 'All', 'woothemes-sensei' ), 'class' => 'current all tab' )
					);

			foreach ( $this->tabs as $k => $v ) {
				$sections[$k] = array( 'href' => '#' . esc_attr( $k ), 'name' => esc_attr( $v['name'] ), 'class' => 'tab' );
			}

			$count = 1;
			foreach ( $sections as $k => $v ) {
				$count++;
				$html .= '<li><a href="' . $v['href'] . '"';
				if ( isset( $v['class'] ) && ( $v['class'] != '' ) ) { $html .= ' class="' . esc_attr( $v['class'] ) . '"'; }

This code seems to be duplicated across your project.

				$html .= '>' . esc_attr( $v['name'] ) . '</a>';
				if ( $count <= count( $sections ) ) { $html .= ' | '; }
				$html .= '</li>' . "\n";
			}

			$html .= '</ul><div class="clear"></div>' . "\n";

			echo $html;
		}
	} // End settings_tabs()

	/**
	 * Create settings tabs based on the settings sections.
	 * @access private
	 * @since  1.1.0
	 * @return void
	 */
	private function create_tabs () {
		if ( count( $this->sections ) > 0 ) {
			$tabs = array();
			foreach ( $this->sections as $k => $v ) {
				$tabs[$k] = $v;
			}

			$this->tabs = $tabs;
		}
	} // End create_tabs()

	/**
	 * Create settings sections.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function create_sections () {
		if ( count( $this->sections ) > 0 ) {
			foreach ( $this->sections as $k => $v ) {
				add_settings_section( $k, $v['name'], array( $this, 'section_description' ), $this->token );
			}
		}
	} // End create_sections()

	/**
	 * Create settings fields.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function create_fields () {
		if ( count( $this->sections ) > 0 ) {
			// $this->parse_fields( $this->fields );

59% of this comment could be valid code. Did you maybe forget this after debugging?

			foreach ( $this->fields as $k => $v ) {
				$method = $this->determine_method( $v, 'form' );
				$name = $v['name'];
				if ( $v['type'] == 'info' ) { $name = ''; }
				add_settings_field( $k, $name, $method, $this->token, $v['section'], array( 'key' => $k, 'data' => $v ) );

				// Let the API know that we have a colourpicker field.
				if ( $v['type'] == 'range' && $this->has_range == false ) { $this->has_range = true; }

It seems like you are loosely comparing two booleans. Considering using the strict comparison === instead.

			}
		}
	} // End create_fields()

	/**
	 * Determine the method to use for outputting a field, validating a field or checking a field.
	 * @access protected
	 * @since  1.0.0
	 * @param  array $data
	 * @return callable,  array or string
	 */
	protected function determine_method ( $data, $type = 'form' ) {
		$method = '';

		if ( ! in_array( $type, array( 'form', 'validate', 'check' ) ) ) { return; }

		// Check for custom functions.
		if ( isset( $data[$type] ) ) {
			if ( function_exists( $data[$type] ) ) {
				$method = $data[$type];
			}

			if ( $method == '' && method_exists( $this, $data[$type] ) ) {
				if ( $type == 'form' ) {
					$method = array( $this, $data[$type] );
				} else {
					$method = $data[$type];
				}
			}
		}

		if ( $method == '' && method_exists ( $this, $type . '_field_' . $data['type'] ) ) {
			if ( $type == 'form' ) {
				$method = array( $this, $type . '_field_' . $data['type'] );
			} else {
				$method = $type . '_field_' . $data['type'];
			}
		}

		if ( $method == '' && function_exists ( $this->token . '_' . $type . '_field_' . $data['type'] ) ) {
			$method = $this->token . '_' . $type . '_field_' . $data['type'];
		}

		if ( $method == '' ) {
			if ( $type == 'form' ) {
				$method = array( $this, $type . '_field_text' );
			} else {
				$method = $type . '_field_text';
			}
		}

		return $method;
	} // End determine_method()

	/**
	 * Parse the fields into an array index on the sections property.
	 * @access public
	 * @since  1.0.0
	 * @param  array $fields
	 * @return void
	 */
	public function parse_fields ( $fields ) {
		foreach ( $fields as $k => $v ) {
			if ( isset( $v['section'] ) && ( $v['section'] != '' ) && ( isset( $this->sections[$v['section']] ) ) ) {
				if ( ! isset( $this->sections[$v['section']]['fields'] ) ) {

This code seems to be duplicated across your project.

					$this->sections[$v['section']]['fields'] = array();
				}

				$this->sections[$v['section']]['fields'][$k] = $v;
			} else {
				$this->remaining_fields[$k] = $v;
			}
		}
	} // End parse_fields()

	/**
	 * Register the settings screen within the WordPress admin.
	 * @access public
	 * @since 1.0.0
	 * @return void
	 */
	public function register_settings_screen () {

		if ( current_user_can( 'manage_sensei' ) ) {
			$hook = add_submenu_page( 'sensei', $this->name, $this->menu_label, 'manage_sensei', $this->page_slug, array( $this, 'settings_screen' ) );

			$this->hook = $hook;
		}

		if ( isset( $_GET['page'] ) && ( $_GET['page'] == $this->page_slug ) ) {

			add_action( 'admin_notices', array( $this, 'settings_errors' ) );
			add_action( 'admin_print_scripts', array( $this, 'enqueue_scripts' ) );
			add_action( 'admin_print_styles', array( $this, 'enqueue_styles' ) );

		}
	} // End register_settings_screen()

	/**
	 * The markup for the settings screen.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function settings_screen ()
    {

        ?>
        <div id="woothemes-sensei" class="wrap <?php echo esc_attr($this->token); ?>">
        <?php screen_icon('woothemes-sensei'); ?>
        <h2><?php echo esc_html($this->name); ?><?php if ('' != $this->settings_version) {
                echo ' <span class="version">' . $this->settings_version . '</span>';
            } ?></h2>
        <p class="powered-by-woo"><?php _e('Powered by', 'woothemes-sensei'); ?><a href="http://www.woothemes.com/"
                                                                                   title="WooThemes"><img
                    src="<?php echo Sensei()->plugin_url; ?>assets/images/woothemes.png" alt="WooThemes"/></a></p>
        <?php do_action('settings_before_form'); ?>
        <form action="options.php" method="post">

        <?php
        $this->settings_tabs();
        settings_fields($this->token);
        $page = 'woothemes-sensei-settings';
        foreach ($this->sections as $section_id => $section) {

            echo '<section id="' . $section_id . '">';

            if ($section['name'])
                echo "<h2>{$section['name']}</h2>\n";

            echo '<table class="form-table">';
            do_settings_fields($page, $section_id );
            echo '</table>';

            echo '</section>';

        }

        submit_button();
        ?>
	</form>
	<?php do_action( 'settings_after_form' ); ?>
</div><!--/#woothemes-sensei-->
<?php
	} // End settings_screen()

	/**
	 * Retrieve the settings from the database.
	 * @access public
	 * @since  1.0.0
	 * @return array
	 */
	public function get_settings () {

        $this->settings = get_option( $this->token, array() );

		foreach ( $this->fields as $k => $v ) {
			if ( ! isset( $this->settings[$k] ) && isset( $v['default'] ) ) {
				$this->settings[$k] = $v['default'];
			}
			if ( $v['type'] == 'checkbox' && $this->settings[$k] != true ) {
				$this->settings[$k] = 0;
			}
		}

		return $this->settings;
	} // End get_settings()

	/**
	 * Register the settings fields.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function settings_fields () {
		register_setting( $this->token, $this->token, array( $this, 'validate_fields' ) );
		$this->create_sections();
		$this->create_fields();
	} // End settings_fields()

	/**
	 * Display settings errors.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function settings_errors () {
        settings_errors( $this->token . '-errors' );
	} // End settings_errors()

	/**
	 * Display the description for a settings section.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function section_description ( $section ) {
		if ( isset( $this->sections[$section['id']]['description'] ) ) {

This code seems to be duplicated across your project.

			echo wpautop( $this->sections[$section['id']]['description'] );
		}
	} // End section_description_main()

	/**
	 * Generate text input field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_text ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		echo '<input id="' . esc_attr( $args['key'] ) . '" name="' . $this->token . '[' . esc_attr( $args['key'] ) . ']" size="40" type="text" value="' . esc_attr( $options[$args['key']] ) . '" />' . "\n";
		if ( isset( $args['data']['description'] ) ) {
			echo '<span class="description">' . $args['data']['description'] . '</span>' . "\n";
		}
	} // End form_field_text()

	/**
	 * Generate color picker field.
	 * @access public
	 * @since  1.6.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_color ( $args ) {
		$options = $this->get_settings();

		echo '<input id="' . esc_attr( $args['key'] ) . '" name="' . $this->token . '[' . esc_attr( $args['key'] ) . ']" size="40" type="text" class="color" value="' . esc_attr( $options[$args['key']] ) . '" />' . "\n";
		echo '<div style="position:absolute;background:#FFF;z-index:99;border-radius:100%;" class="colorpicker"></div>';
		if ( isset( $args['data']['description'] ) ) {
			echo '<span class="description">' . $args['data']['description'] . '</span>' . "\n";
		}
	} // End form_field_text()

	/**
	 * Generate checkbox field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_checkbox ( $args ) {
		$options = $this->get_settings();

		$has_description = false;
		if ( isset( $args['data']['description'] ) ) {
			$has_description = true;
			echo '<label for="' . esc_attr( $args['key'] ) . '">' . "\n";
		}
		echo '<input id="' . $args['key'] . '" name="' . $this->token . '[' . esc_attr( $args['key'] ) . ']" type="checkbox" value="1"' . checked( esc_attr( $options[$args['key']] ), '1', false ) . ' />' . "\n";
		if ( $has_description ) {
			echo wp_kses( $args['data']['description'], array( 'a' => array(
																	        'href' => array(),
																	        'title' => array()
																	    )
															)
						) . '</label>' . "\n";
		}
	} // End form_field_checkbox()

	/**
	 * Generate textarea field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_textarea ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		echo '<textarea id="' . esc_attr( $args['key'] ) . '" name="' . $this->token . '[' . esc_attr( $args['key'] ) . ']" cols="42" rows="5">' . esc_html( $options[$args['key']] ) . '</textarea>' . "\n";
		if ( isset( $args['data']['description'] ) ) {
			echo '<p><span class="description">' . esc_html( $args['data']['description'] ) . '</span></p>' . "\n";
		}
	} // End form_field_textarea()

	/**
	 * Generate select box field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_select ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		if ( isset( $args['data']['options'] ) && ( count( (array)$args['data']['options'] ) > 0 ) ) {
			$html = '';
			$html .= '<select class="" id="' . esc_attr( $args['key'] ) . '" name="' . esc_attr( $this->token ) . '[' . esc_attr( $args['key'] ) . ']">' . "\n";
				foreach ( $args['data']['options'] as $k => $v ) {
					$html .= '<option value="' . esc_attr( $k ) . '"' . selected( esc_attr( $options[$args['key']] ), $k, false ) . '>' . $v . '</option>' . "\n";
				}
			$html .= '</select>' . "\n";
			echo $html;

			if ( isset( $args['data']['description'] ) ) {
				echo '<p><span class="description">' . esc_html( $args['data']['description'] ) . '</span></p>' . "\n";
			}
		}
	} // End form_field_select()

	/**
	 * Generate radio button field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_radio ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		if ( isset( $args['data']['options'] ) && ( count( (array)$args['data']['options'] ) > 0 ) ) {
			$html = '';
			foreach ( $args['data']['options'] as $k => $v ) {
				$html .= '<input type="radio" name="' . $this->token . '[' . esc_attr( $args['key'] ) . ']" value="' . esc_attr( $k ) . '"' . checked( esc_attr( $options[$args['key']] ), $k, false ) . ' /> ' . $v . '<br />' . "\n";
			}
			echo $html;

			if ( isset( $args['data']['description'] ) ) {
				echo '<span class="description">' . esc_html( $args['data']['description'] ) . '</span>' . "\n";
			}
		}
	} // End form_field_radio()

	/**
	 * Generate multicheck field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_multicheck ( $args ) {
		$options = $this->get_settings();

		if ( isset( $args['data']['options'] ) && ( count( (array)$args['data']['options'] ) > 0 ) ) {
			$html = '<div class="multicheck-container" style="margin-bottom:10px;">' . "\n";
			foreach ( $args['data']['options'] as $k => $v ) {
				$checked = '';

				if( isset( $options[ $args['key'] ] ) ) {
					if ( in_array( $k, (array)$options[ $args['key'] ] ) ) { $checked = ' checked="checked"'; }
				} else {
					if ( in_array( $k, $args['data']['defaults'] ) ) { $checked = ' checked="checked"'; }
				}
				$html .= '<label for="checkbox-' . esc_attr( $k ) . '">' . "\n";
				$html .= '<input type="checkbox" name="' . esc_attr( $this->token ) . '[' . esc_attr( $args['key'] ) . '][]" class="multicheck multicheck-' . esc_attr( $args['key'] ) . '" value="' . esc_attr( $k ) . '" id="checkbox-' . esc_attr( $k ) . '" ' . $checked . ' /> ' . $v . "\n";
				$html .= '</label><br />' . "\n";
			}
			$html .= '</div>' . "\n";
			echo $html;

			if ( isset( $args['data']['description'] ) ) {
				echo '<span class="description">' . esc_html( $args['data']['description'] ) . '</span>' . "\n";
			}
		}
	} // End form_field_multicheck()

	/**
	 * Generate range field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_range ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		if ( isset( $args['data']['options'] ) && ( count( (array)$args['data']['options'] ) > 0 ) ) {
			$html = '';
			$html .= '<select id="' . esc_attr( $args['key'] ) . '" name="' . esc_attr( $this->token ) . '[' . esc_attr( $args['key'] ) . ']" class="range-input">' . "\n";
				foreach ( $args['data']['options'] as $k => $v ) {
					$html .= '<option value="' . esc_attr( $k ) . '"' . selected( esc_attr( $options[$args['key']] ), $k, false ) . '>' . $v . '</option>' . "\n";
				}
			$html .= '</select>' . "\n";
			echo $html;

			if ( isset( $args['data']['description'] ) ) {
				echo '<p><span class="description">' . esc_html( $args['data']['description'] ) . '</span></p>' . "\n";
			}
		}
	} // End form_field_range()

	/**
	 * Generate image-based selector form field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_images ( $args ) {

This method seems to be duplicated in your project.

		$options = $this->get_settings();

		if ( isset( $args['data']['options'] ) && ( count( (array)$args['data']['options'] ) > 0 ) ) {
			$html = '';
			foreach ( $args['data']['options'] as $k => $v ) {
				$html .= '<input type="radio" name="' . esc_attr( $this->token ) . '[' . esc_attr( $args['key'] ) . ']" value="' . esc_attr( $k ) . '"' . checked( esc_attr( $options[$args['key']] ), $k, false ) . ' /> ' . $v . '<br />' . "\n";
			}
			echo $html;

			if ( isset( $args['data']['description'] ) ) {
				echo '<span class="description">' . esc_html( $args['data']['description'] ) . '</span>' . "\n";
			}
		}
	} // End form_field_images()

	/**
	 * Generate information box field.
	 * @access public
	 * @since  1.0.0
	 * @param  array $args
	 * @return void
	 */
	public function form_field_info ( $args ) {
		$class = '';
		if ( isset( $args['data']['class'] ) ) {

This code seems to be duplicated across your project.

			$class = ' ' . esc_attr( $args['data']['class'] );
		}
		$html = '<div id="' . $args['key'] . '" class="info-box' . $class . '">' . "\n";
		if ( isset( $args['data']['name'] ) && ( $args['data']['name'] != '' ) ) {

This code seems to be duplicated across your project.

			$html .= '<h3 class="title">' . esc_html( $args['data']['name'] ) . '</h3>' . "\n";
		}
		if ( isset( $args['data']['description'] ) && ( $args['data']['description'] != '' ) ) {

This code seems to be duplicated across your project.

			$html .= '<p>' . esc_html( $args['data']['description'] ) . '</p>' . "\n";
		}
		$html .= '</div>' . "\n";

		echo $html;
	} // End form_field_info()


	/**
	 * Generate button field.
	 * @access public
	 * @since  1.9.0
	 * @param  array $args
	 */
	public function form_field_button( $args ) {
		$options = $this->get_settings();

		if ( isset( $args['data']['target'] ) && isset( $args['data']['label'] ) ) {
			printf( '<a href="%s" class="button button-secondary">%s</a> ', esc_url( $args['data']['target'] ), esc_html( $args['data']['label'] ) );

			if ( isset( $args['data']['description'] ) ) {
				echo '<span class="description">' . esc_html( $args['data']['description'] ) . '</span>' . "\n";
			}
		}
	} // End form_field_button()


	/**
	 * Validate registered settings fields.
	 * @access public
	 * @since  1.0.0
	 * @param  array $input
	 * @uses   $this->parse_errors()
	 * @return array $options
	 */
	public function validate_fields ( $input ) {
		$options = $this->get_settings();

		foreach ( $this->fields as $k => $v ) {
			// Make sure checkboxes are present even when false.
			if ( $v['type'] == 'checkbox' && ! isset( $input[$k] ) ) { $input[$k] = false; }

This code seems to be duplicated across your project.

			if ( $v['type'] == 'multicheck' && ! isset( $input[$k] ) ) { $input[$k] = false; }

			if ( isset( $input[$k] ) ) {
				// Perform checks on required fields.
				if ( isset( $v['required'] ) && ( $v['required'] == true ) ) {
					if ( in_array( $v['type'], $this->get_array_field_types() ) && ( count( (array) $input[$k] ) <= 0 ) ) {
						$this->add_error( $k, $v );
						continue;
					} else {
						if ( $input[$k] == '' ) {
							$this->add_error( $k, $v );
							continue;
						}
					}
				}

				$value = $input[$k];

				// Check if the field is valid.
				$method = $this->determine_method( $v, 'check' );

				if ( function_exists ( $method ) ) {

This code seems to be duplicated across your project.

					$is_valid = $method( $value );
				} else {
					if ( method_exists( $this, $method ) ) {
						$is_valid = $this->$method( $value );
					}
				}

				if ( ! $is_valid ) {
					$this->add_error( $k, $v );
					continue;
				}

				$method = $this->determine_method( $v, 'validate' );

				if ( function_exists ( $method ) ) {

This code seems to be duplicated across your project.

					$options[$k] = $method( $value );
				} else {
					if ( method_exists( $this, $method ) ) {
						$options[$k] = $this->$method( $value );
					}
				}
			}
		}

		// Parse error messages into the Settings API.
		$this->parse_errors();
		return $options;
	} // End validate_fields()

	/**
	 * Validate text fields.
	 * @access public
	 * @since  1.0.0
	 * @param  string $input
	 * @return string
	 */
	public function validate_field_text ( $input ) {
		return trim( esc_attr( $input ) );
	} // End validate_field_text()

	/**
	 * Validate checkbox fields.
	 * @access public
	 * @since  1.0.0
	 * @param  string $input
	 * @return string
	 */
	public function validate_field_checkbox ( $input ) {
		if ( ! isset( $input ) ) {
			return 0;
		} else {
			return (bool)$input;
		}
	} // End validate_field_checkbox()

	/**
	 * Validate multicheck fields.
	 * @access public
	 * @since  1.0.0
	 * @param  string $input
	 * @return string
	 */
	public function validate_field_multicheck ( $input ) {
		$input = (array) $input;

		$input = array_map( 'esc_attr', $input );

		return $input;
	} // End validate_field_multicheck()

	/**
	 * Validate range fields.
	 * @access public
	 * @since  1.0.0
	 * @param  string $input
	 * @return string
	 */
	public function validate_field_range ( $input ) {
		$input = number_format( floatval( $input ), 0 );

		return $input;
	} // End validate_field_range()

	/**
	 * Validate URL fields.
	 * @access public
	 * @since  1.0.0
	 * @param  string $input
	 * @return string
	 */
	public function validate_field_url ( $input ) {
		return trim( esc_url( $input ) );
	} // End validate_field_url()

	/**
	 * Check and validate the input from text fields.
	 * @param  string $input String of the value to be validated.
	 * @since  1.1.0
	 * @return boolean Is the value valid?
	 */
	public function check_field_text ( $input ) {

The parameter $input is not used and could be removed.

		$is_valid = true;

		return $is_valid;
	} // End check_field_text()

	/**
	 * Log an error internally, for processing later using $this->parse_errors().
	 * @access protected
	 * @since  1.0.0
	 * @param  string $key
	 * @param  array $data
	 * @return void
	 */
	protected function add_error ( $key, $data ) {
		if ( isset( $data['error_message'] ) ) {
			$message = $data['error_message'];
		} else {
			$message = sprintf( __( '%s is a required field', 'woothemes-sensei' ), $data['name'] );
		}
		$this->errors[$key] = $message;
	} // End add_error()

	/**
	 * Parse logged errors.
	 * @access  protected
	 * @since   1.0.0
	 * @return  void
	 */
	protected function parse_errors () {
		if ( count ( $this->errors ) > 0 ) {
			foreach ( $this->errors as $k => $v ) {
				add_settings_error( $this->token . '-errors', $k, $v, 'error' );
			}
		} else {
			$message = sprintf( __( '%s updated', 'woothemes-sensei' ), $this->name );
			add_settings_error( $this->token . '-errors', $this->token, $message, 'updated' );
		}
	} // End parse_errors()

	/**
	 * Return an array of field types expecting an array value returned.
	 * @access protected
	 * @since  1.0.0
	 * @return array
	 */
	protected function get_array_field_types () {
		return array( 'multicheck' );
	} // End get_array_field_types()

	/**
	 * Load in JavaScripts where necessary.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function enqueue_scripts () {

        $suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';

		wp_enqueue_script( 'farbtastic' );
		wp_enqueue_script( 'woothemes-sensei-settings', esc_url( Sensei()->plugin_url . 'assets/js/settings' . $suffix . '.js' ), array( 'jquery', 'farbtastic' ), Sensei()->version );

		if ( $this->has_range ) {

This code seems to be duplicated across your project.

			wp_enqueue_script( 'woothemes-sensei-settings-ranges', esc_url( Sensei()->plugin_url . 'assets/js/ranges' . $suffix . '.js' ), array( 'jquery-ui-slider' ), Sensei()->version );
		}

		wp_register_script( 'woothemes-sensei-settings-imageselectors', esc_url( Sensei()->plugin_url . 'assets/js/image-selectors' . $suffix . '.js' ), array( 'jquery' ), Sensei()->version );

		if ( $this->has_imageselector ) {
			wp_enqueue_script( 'woothemes-sensei-settings-imageselectors' );
		}

	} // End enqueue_scripts()

	/**
	 * Load in CSS styles where necessary.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function enqueue_styles () {

		wp_enqueue_style( $this->token . '-admin' );

		wp_enqueue_style( 'farbtastic' );
		wp_enqueue_style( 'woothemes-sensei-settings-api', esc_url( Sensei()->plugin_url . 'assets/css/settings.css' ), array( 'farbtastic' ), Sensei()->version );

		$this->enqueue_field_styles();
	} // End enqueue_styles()

	/**
	 * Load in CSS styles for field types where necessary.
	 * @access public
	 * @since  1.0.0
	 * @return void
	 */
	public function enqueue_field_styles () {

		if ( $this->has_range ) {

This code seems to be duplicated across your project.

			wp_enqueue_style( 'woothemes-sensei-settings-ranges', esc_url( Sensei()->plugin_url . 'assets/css/ranges.css' ), '', Sensei()->version );
		}

		wp_register_style( 'woothemes-sensei-settings-imageselectors', esc_url( Sensei()->plugin_url . 'assets/css/image-selectors.css' ), '', Sensei()->version );

		if ( $this->has_imageselector ) {
			wp_enqueue_style( 'woothemes-sensei-settings-imageselectors' );
		}
	} // End enqueue_field_styles()
} // End Class

/**
 * Class WooThemes_Sensei_Settings_API
 * @ignore only for backward compatibility
 * @since 1.9.0
 */
class WooThemes_Sensei_Settings_API extends Sensei_Settings_API{}