<?php
/**
 * @version     1.0
 * @package     Settings
 * @category    Abstract Class
 * @author      wpdevelop
 *
 * @web-site    https://wpbookingcalendar.com/
 * @email       info@wpbookingcalendar.com 
 * @modified    2015-10-06
 */

if ( ! defined( 'ABSPATH' ) ) exit;                                             // Exit if accessed directly


abstract class WPBC_Settings_API {

	/**
	 * ID of specific Settings page
	 * basically its prefix near each generated Input field
	 *
	 * @var String
	 */
	public $id;

	/**
	 * Define different options for CLASS - check  more in constructor.
	 *
	 * @var array
	 */
	public $options;

	/**
	 * List of all settings rows
	 * @var array
	 */
	public $fields = array();

	/**
	 * Values of all settings fields
	 * @var array
	 */
	public $fields_values = array();

	/**
	 * Validated fields after $_POST request - for example before saving to DB
	 *
	 * @var array
	 */
	public $validated_fields = array();


	/**
	 * If setted,  then  we can validate all form  fields, BEFORE post.
	 * Each form  field that  we need to  validate have to  have parameter: "validate_as" which  ia array, like array('required')
	 * HTML fields elements will  have additional CSS classes,  like "validate-required"
	 * If this $validated_form_id empty  so  then  no validation  procedure.
	 *
	 * @var string
	 */
	public $validated_form_id = '';

	/**
	 * Constructor for Settings API
	 *
	 * @param string $id                - unique ID of this Settings
	 * @param array  $options           - Optional. Array of parameters.
	 *                                  array(
	 *                                  'db_prefix_option'  => 'wpbc_'
	 *                                  , 'db_saving_type'  => 'togather'       ['togather'|'separate'|'separate_prefix']
	 *                                  )
	 * @param array  $fields_values     - optional array of values. If skipped, then case system try to get values from DB.
	 */
	public function __construct( $id, $options = array(), $fields_values = array() ) {

		$this->id = $id;                                                        // Define name of this settings page .

		$default_options = array(
			'db_prefix_option' => 'wpbc_',
			// Prefix for adding to option name before saving to DB.
			'db_saving_type'   => 'separate'
			// Type of DB saving: 'togather' | 'separate' | 'separate_prefix'.
			/*  'togather' - saving all parameters from settings page to  one DB option
				'separate' - saving each settings parameters as separate DB options
				'separate_prefix' - saving each settings parameters as separate DB options
									with prefix $id */
		);

		$this->options = wp_parse_args( $options, $default_options );

		// Define what  fields we are having.
		$this->init_settings_fields();                                          // Init all Fields Rows for settings page.


		// Get Values for the fields
		if ( empty( $fields_values ) ) {
			$this->define_fields_values_from_db();                              // Define Fields Values from DB.
		} else {
			$this->define_fields_values( $fields_values );                      // Define Fields by transmited values.
		}

		// Set Values for the fields.
		$this->set_values_to_fields();                                          // Assign $this->fields_values['some_field']   to  $this->fields[ 'some_field' ]['value'].

		add_action( 'wpbc_after_settings_content', array(
			$this,
			'enqueue_validate_js'
		), 10, 3 );        // Add JavaScript if you need.
	}


	/**
	 * Validate Form Fields before $_POST request
	 *
	 * @param string $page_tag
	 */
	public function enqueue_validate_js( $page_tag, $active_page_tab, $active_page_subtab ) {

		if ( empty( $this->validated_form_id ) ) {
			return;
		}

		// Get Fields to  validate
		$fields_to_validate = array();
		foreach ( $this->fields as $field_name => $field_values ) {

			if ( ( isset( $field_values['validate_as'] ) ) && ( ! empty( $field_values['validate_as'] ) ) ) {
				$field_html_id = $this->id . '_' . $field_name;
				$fields_to_validate[ $field_html_id ] = $field_values['validate_as'];
			}
		}
		// JavaScript .

		$js_script = '';

		$js_script .= " jQuery('#" . $this->validated_form_id . "').on( 'submit', function(){ ";      // Catch Submit event.

		foreach ( $fields_to_validate as $field_html_id => $field_validate_array ) {

			// Validate Required.
			$js_script .= " if ( jQuery('#" . $field_html_id . "').val() == '' ) { " . "\n";

			$js_script .= "     wpbc_field_highlight( '#" . $field_html_id . "' );" . "\n";

			//$js_script .= "     wpbc_scroll_to( '#". $field_html_id ."' );" . "\n" ;
			//$js_script .= "     showWarningUnderElement( '#". $field_html_id ."' );" . "\n" ;

			$js_script .= "     return false; " . "\n";                                        // - cancel event - Submit.

			$js_script .= " }" . "\n";
		}

		$js_script .= "      } ); " . "\n";

		// Eneque JS to  the footer of the page.
		wpbc_enqueue_js( $js_script );
	}

	// -----------------------------------------------------------------------------------------------------------------
	// Abstract methods
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 * Init all fields rows for settings page
	 */
	abstract public function init_settings_fields();




	// -----------------------------------------------------------------------------------------------------------------
	// Functions
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 * Get array of Default fields Names and Values.
	 *  Example:
	 *           $default_values = array(
	 *                           'my_date_format'           => get_option('date_format')
	 *                         , 'my_time_format'           => get_option('time_format')
	 *                       );
	 *
	 * @return array
	 */
	public function get_default_values() {

		$default_values = array();

		foreach ( $this->fields as $field_name => $field_data ) {
			if ( isset( $field_data['default'] ) ) {
				$default_values[ $field_name ] = $field_data['default'];
			} else {
				// Action  here if no default value in field.
			}
		}

		return $default_values;
	}


	/**
	 * Define "Default Values" for all exist settings Fields.
	 *
	 * @param array $fields_values - Optional. Field values
	 */
	public function define_fields_values( $fields_values = array(), $is_check_exist_values_from_fields = true ) {

		// Default .
		if ( $is_check_exist_values_from_fields ) {
			$default_values = $this->get_default_values();
		} else {
			$default_values = array();
		}

		// Parse.
		$this->fields_values = wp_parse_args( $fields_values, $default_values );

		if ( $is_check_exist_values_from_fields ) {                             // We no need to  check  it after saving to DB.
			$defined_values_in_fields = array();
			foreach ( $this->fields as $field_name => $field_data ) {
				if ( isset( $field_data['value'] ) ) {
					$defined_values_in_fields[ $field_name ] = $field_data['value'];
				}
			}
			$this->fields_values = wp_parse_args( $defined_values_in_fields, $this->fields_values );
		}
	}


	/**
	 * Set Values to Fiels
	 *   Assign $this->fields_values   to  $fields[ 'some_field' ]['value']
	 */
	public function set_values_to_fields() {

		foreach ( $this->fields_values as $field_name => $field_value ) {

			if ( isset( $this->fields[ $field_name ] ) ) {
				$this->fields[ $field_name ]['value'] = $field_value;
			}
		}
	}


	/**
	 * Get ID of this settings page
	 *
	 * @return string
	 */
	public function get_id() {
		return $this->id;
	}


	/**
	 *  Get Value of specfic Field
	 *
	 * @param string $field_name
	 *
	 * @return mixed or false,  if field does not exist
	 *
	 */
	public function get_field_value( $field_name ) {

		if ( empty( $this->fields_values ) ) {
			$this->define_fields_values();
		}                                      // If empty,  then define by Default values

		return isset( $this->fields_values[ $field_name ] ) ? $this->fields_values[ $field_name ] : false;
	}


	/**
	 * Set Value to specfic Field
	 *
	 * @param string $field_name
	 *
	 * @return mixed or false,  if field does not exist
	 *
	 */
	public function set_field_value( $field_name, $field_value ) {

		if ( empty( $this->fields_values ) ) {
			$this->define_fields_values();
		}                                      // If empty,  then define by Default values

		$this->fields_values[ $field_name ] = $field_value;
	}


	/**
	 * Get all exist form  fields
	 * and Init fields,  if fields are empty.
	 *
	 * @return array
	 */
	public function get_form_fields() {

		if ( empty( $this->fields ) ) {
			$this->init_settings_fields();
		}

		return $this->fields;
	}


	/**
	 *  Generate Settings Table
	 */
	public function show( $group = false ) {
		?>
		<table class="form-table">
		<?php
		$this->generate_settings_rows( $group );
		?>
		</table>
		<?php
	}


	/**
	 *  Loop through the fields array and show settings.
	 */
	public function generate_settings_rows( $group = false, $form_fields = false ) {

		if ( ! $form_fields ) {
			$form_fields = $this->get_form_fields();
		}

		$html = '';
		foreach ( $form_fields as $k => $v ) {

			$k = $this->id . '_' . $k;

			if ( ! isset( $v['type'] ) || ( $v['type'] == '' ) ) {
				$v['type'] = 'text';
			}

			if (
				( $group === false ) || ( ( ! isset( $v['group'] ) ) && ( $group == 'general' ) ) || ( ( isset( $v['group'] ) ) && ( $group == $v['group'] ) ) ) {
				if ( method_exists( $this, 'field_' . $v['type'] . '_row' ) ) {
					$html .= $this->{'field_' . $v['type'] . '_row'}( $k, $v );
				} else {
					$html .= $this->{'field_text_row'}( $k, $v );
				}
			}
		}

		// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		echo $html;
	}


	// <editor-fold     defaultstate="collapsed"                        desc=" G e n e r a t e    F i e l d s "  >

	// -----------------------------------------------------------------------------------------------------------------
	// Input Fields
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 *  Text Input Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_text_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_text_row_static( $field_name, $field, $echo );
		} else {
			self::field_text_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Text Color Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_color_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_color_row_static( $field_name, $field, $echo );
		} else {
			self::field_color_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Textarea Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_textarea_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_textarea_row_static( $field_name, $field, $echo );
		} else {
			self::field_textarea_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  WP Rich Content Edit Textarea Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_wp_textarea_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_wp_textarea_row_static( $field_name, $field, $echo );
		} else {
			self::field_wp_textarea_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 * Radio buttons field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_radio_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_radio_row_static( $field_name, $field, $echo );
		} else {
			self::field_radio_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 * Selectbox field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_select_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_select_row_static( $field_name, $field, $echo );
		} else {
			self::field_select_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 * Checkbox field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_checkbox_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_checkbox_row_static( $field_name, $field, $echo );
		} else {
			self::field_checkbox_row_static( $field_name, $field, $echo );
		}
	}

	// -----------------------------------------------------------------------------------------------------------------
	// Static Methods
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 *  Static Text Input Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_text_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'           => '',
			'disabled'        => false,
			'class'           => '',
			'css'             => '',
			'placeholder'     => '',
			'type'            => 'text',
			'description'     => '',
			'attr'            => array(),
			'group'           => 'general',
			'tr_class'        => '',
			'only_field'      => false,
			'description_tag' => 'p',
			'validate_as'     => array()
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}

		if ( ! $field['only_field'] ) {
			?>
			<tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] );
			?>">
			<th scope="row">
				<?php
				echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			</th>
			<td><fieldset><?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<input type="<?php
		echo esc_attr( $field['type'] ); ?>"
			   id="<?php
			   echo esc_attr( $field_name ); ?>"
			   name="<?php
			   echo esc_attr( $field_name ); ?>"
			   value="<?php
			   echo esc_attr( $field['value'] ); ?>"
			   class="regular-text <?php
			   echo esc_attr( $field['class'] );
			   echo esc_attr( ( ! empty( $field['validate_as'] ) ) ? ' validate-' . implode( ' validate-', $field['validate_as'] ) : '' ); ?>"
			   style="<?php
			   echo esc_attr( $field['css'] ); ?>"
			   placeholder="<?php
			   echo esc_attr( $field['placeholder'] ); ?>"
			<?php
			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo self::get_custom_attr_static( $field ); ?>
			<?php
			disabled( $field['disabled'], true ); ?>
			   autocomplete="off"
		/>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  Static Color Input Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_color_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'           => '',
			'disabled'        => false,
			'class'           => '',
			'css'             => '',
			'placeholder'     => '',
			'type'            => 'text',
			'description'     => '',
			'attr'            => array(),
			'group'           => 'general',
			'tr_class'        => '',
			'only_field'      => false,
			'description_tag' => 'p'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		if ( ! $field['only_field'] ) {
			?>
			<tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
				<?php
				echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			</th>
			<td><fieldset><?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<input type="text"
			   id="<?php
			   echo esc_attr( $field_name ); ?>"
			   name="<?php
			   echo esc_attr( $field_name ); ?>"
			   value="<?php
			   echo esc_attr( $field['value'] ); ?>"
			   class="regular-text wpbc_colorpick <?php
			   echo esc_attr( $field['class'] ); ?>"
			   style="width: 6em; background-color: <?php
			   // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			   echo $field['value']; ?>;<?php
			   echo esc_attr( $field['css'] ); ?>"
			   placeholder="<?php
			   echo esc_attr( $field['placeholder'] ); ?>"
			<?php
			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo self::get_custom_attr_static( $field ); ?>
			<?php
			disabled( $field['disabled'], true ); ?>
			   autocomplete="off"
		/>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  Static Textarea Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_textarea_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'           => '',
			'disabled'        => false,
			'class'           => '',
			'css'             => '',
			'placeholder'     => '',
			'type'            => 'text',
			'description'     => '',
			'attr'            => array(),
			'rows'            => 3,
			'cols'            => 20,
			'show_in_2_cols'  => false,
			'group'           => 'general',
			'tr_class'        => '',
			'only_field'      => false,
			'description_tag' => 'p',
			'validate_as'     => array()
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}

		if ( ! $field['only_field'] ) {
			?>
		<tr valign="top" class="wpbc_tr_<?php
		echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
			<?php
			echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			<?php
			if ( $field['show_in_2_cols'] ) { ?>
				</th>
				<td></td>
				</tr>
				<tr valign="top" class="wpbc_tr_<?php
				echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
				<td colspan="2"><fieldset>
			<?php
			} else {
				echo ' </th>';                  // FixIn: 9.6.3.3.
				echo ' <td><fieldset>';
			} ?><?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<textarea
			rows="<?php
			echo esc_attr( $field['rows'] ); ?>"
			cols="<?php
			echo esc_attr( $field['cols'] ); ?>"
                            <?php
							/* type="<?php echo esc_attr( $field['type'] ); ?>" */ ?>
                            id="<?php
							echo esc_attr( $field_name ); ?>"
			name="<?php
			echo esc_attr( $field_name ); ?>"
			class="input-text wide-input <?php
			echo esc_attr( $field['class'] );
			echo esc_attr( ( ! empty( $field['validate_as'] ) ) ? ' validate-' . implode( ' validate-', $field['validate_as'] ) : '' ); ?>"
			style="<?php
			echo esc_attr( $field['css'] ); ?>"
			placeholder="<?php
			echo esc_attr( $field['placeholder'] ); ?>"
                            <?php
							// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
							echo self::get_custom_attr_static( $field ); ?>
			<?php
			disabled( $field['disabled'], true ); ?>
                            autocomplete="off"
		><?php
			echo esc_textarea( $field['value'] ); ?></textarea>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  Static WP Rich Content Edit Textarea Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_wp_textarea_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'            => '',
			'disabled'         => false,
			'class'            => '',
			'css'              => '',
			'placeholder'      => '',
			'type'             => 'text',
			'description'      => '',
			'attr'             => array(),
			'rows'             => 3,
			'editor_height'    => '',
			'cols'             => 20,
			'teeny'            => true,
			'show_visual_tabs' => true,
			'default_editor'   => 'tinymce',
			// 'tinymce' | 'html'       // 'html' is used for the "Text" editor tab.
			'drag_drop_upload' => false,
			'show_in_2_cols'   => false,
			'group'            => 'general',
			'tr_class'         => '',
			'only_field'       => false,
			'description_tag'  => 'p'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		if ( ! $field['only_field'] ) {
			?>
		<tr valign="top" class="wpbc_tr_<?php
		echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
			<?php
			echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			<?php
			if ( $field['show_in_2_cols'] ) { ?>
				</th>
				<td></td>
				</tr>
				<tr valign="top" class="wpbc_tr_<?php
				echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
				<td colspan="2"><fieldset>
			<?php
			} else {
				echo ' </th>';              // FixIn: 9.6.3.3.
				echo ' <td><fieldset>';
			} ?><?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
			echo wp_kses_post( $field['title'] ); ?></span></legend><?php
		wp_editor( $field['value'], esc_attr( $field_name ), array(
				'wpautop'          => false,
				'media_buttons'    => false,
				'textarea_name'    => esc_attr( $field_name ),
				'textarea_rows'    => $field['rows'],
				'editor_class'     => 'wpbc-textarea-tinymce ' . esc_attr( $field['class'] )
				// Any extra CSS Classes to append to the Editor textarea
			,
				'teeny'            => esc_attr( $field['teeny'] )
				// Whether to output the minimal editor configuration used in PressThis
			,
				'drag_drop_upload' => esc_attr( $field['drag_drop_upload'] )
				// Enable Drag & Drop Upload Support (since WordPress 3.9)
			,
				'tinymce'          => $field['show_visual_tabs']
				// Remove Visual Mode from the Editor
			,
				'default_editor'   => $field['default_editor']
				// 'tinymce' | 'html'     // 'html' is used for the "Text" editor tab.
			,
				'editor_height'    => $field['editor_height']
				//  '' | '500'
			) );
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 * Static Radio buttons field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_radio_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'            => '',
			'label'            => '',
			'disabled'         => false,
			'disabled_options' => array(),
			'class'            => '',
			'css'              => '',
			'type'             => 'radio',
			'description'      => '',
			'attr'             => array(),
			'options'          => array(),
			'group'            => 'general',
			'tr_class'         => '',
			'only_field'       => false,
			'is_new_line'      => false,
			'description_tag'  => 'span'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		if ( ! $field['only_field'] ) {
			?>
			<tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
				<?php
				echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			</th>
			<td><fieldset><?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<?php
		foreach ( $field['options'] as $option_value => $option_title ) {

			$option_parameters = array();
			if ( is_array( $option_title ) ) {
				$option_parameters = $option_title;
				$option_title = $option_title['title'];
			}

			?><label  class="wpbc-form-radio" title="<?php
			echo esc_attr( $option_title ); ?>">
			<input type="radio"
				   name="<?php
				   echo esc_attr( $field_name ); ?>"
				   value="<?php
				   echo esc_attr( $option_value ); ?>"
				   class="<?php
				   echo esc_attr( $field['class'] ); ?>"
				   style="<?php
				   echo esc_attr( $field['css'] ); ?>"
				<?php
				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				echo self::get_custom_attr_static( $field ); ?>
				<?php
				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				echo self::get_custom_attr_static( $option_parameters ); ?>
				<?php
				checked( $field['value'], $option_value ); ?>
				<?php
				disabled( $field['disabled'], true ); ?>
				<?php
				disabled( in_array( $option_value, $field['disabled_options'] ), true ); ?>
				   autocomplete="off"
			/> <?php
			echo wp_kses_post( $option_title ); ?></label><?php
			echo ( $field['is_new_line'] ) ? '<br/>' : '&nbsp; &nbsp; &nbsp;';

			if ( isset( $option_parameters['html'] ) ) {
				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				echo  $option_parameters['html'] ;
			}
		} ?>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 * Static Selectbox field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_select_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'            => '',
			'label'            => '',
			'disabled'         => false,
			'disabled_options' => array(),
			'class'            => '',
			'css'              => '',
			'type'             => 'select',
			'description'      => '',
			'multiple'         => false,
			'attr'             => array(),
			'options'          => array(),
			'group'            => 'general',
			'tr_class'         => '',
			'only_field'       => false,
			'description_tag'  => 'span'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}

		if ( ! $field['only_field'] ) {
			?>
			<tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
				<?php
				echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			</th>
			<td><fieldset>
			<?php
		}
		?>
		<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<select
			id="<?php
			echo esc_attr( $field_name ); ?>"
			name="<?php
			echo esc_attr( $field_name );
			echo( $field['multiple'] ? '[]' : '' ); ?>"
			class="<?php
			echo esc_attr( $field['class'] ); ?>"
			style="<?php
			echo esc_attr( $field['css'] ); ?>"
			<?php
			disabled( $field['disabled'], true ); ?>
			<?php
			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo self::get_custom_attr_static( $field ); ?>
			<?php
			echo( $field['multiple'] ? ' multiple="MULTIPLE"' : '' ); ?>
			autocomplete="off"
		><?php

			foreach ( (array) $field['options'] as $option_value => $option_title ) {

				$option_parameters = array();
				if ( is_array( $option_title ) ) {
					$option_parameters = $option_title;
					$option_title = ( ! empty( $option_title['title'] ) ) ? $option_title['title'] : '';
				}


				//                            array(
				//                                  'title' => 'Option Group Title'             // Title
				//                                , 'optgroup' => true                          // Use only  if you need to show OPTGROUP - Also  need to  use 'title' of start, end 'close' for END
				//                                , 'close'  => false
				//                            )

				if ( ! empty( $option_parameters['optgroup'] ) ) {                                   // OPTGROUP

					if ( ! $option_parameters['close'] ) {
						?><optgroup label="<?php
						echo esc_attr( $option_parameters['title'] ); ?>"><?php
					} else {
						?></optgroup><?php
					}
				} else {


					?>
					<option value="<?php
					echo esc_attr( $option_value ); ?>"
					<?php
					if ( ( is_array( $field['value'] ) ) && ( in_array( $option_value, $field['value'] ) ) ) {
						selected( true );
					} else {
						if ( ! is_array( $field['value'] ) ) {                                    // FixIn: 8.1.1.2.
							selected( $option_value, $field['value'] );
						}
					}
					?>
					<?php
					disabled( in_array( $option_value, $field['disabled_options'] ), true ); ?>
					<?php
					// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
					echo self::get_custom_attr_static( $option_parameters ); ?>
					><?php
					echo wp_kses_post( $option_title ); ?></option><?php
				}
			} ?>
		</select>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) {
			?>
			</fieldset></td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 * Static Checkbox field row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_checkbox_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'title'           => '',
			'label'           => '',
			'disabled'        => false,
			'class'           => '',
			'css'             => '',
			'type'            => 'checkbox',
			'description'     => '',
			'attr'            => array(),
			'group'           => 'general',
			'tr_class'        => '',
			'only_field'      => false,
			'is_new_line'     => true,
			'description_tag' => 'span'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		if ( ! $field['only_field'] ) {
			?>
			<tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<th scope="row">
				<?php
				echo wp_kses_post( self::label_static( $field_name, $field ) ); ?>
			</th>
			<td><fieldset><?php
		}

		// Show toggles in Settings pages
		if ( 1 ) {

			$field['label'] = str_replace( '<span', '<i style="font-style: normal;"', $field['label'] );
			$field['label'] = str_replace( '/span>', '/i>', $field['label'] );

			$params_checkbox = array(
				'id'           => $field_name
				// HTML ID  of element
			,
				'name'         => $field_name,
				'label'        => array( 'title' => wp_kses_post( $field['label'] ), 'position' => 'right' )
				// FixIn: 9.6.1.5.
			,
				'toggle_style' => $field['css']
				// CSS of select element
			,
				'class'        => $field['class']
				// CSS Class of select element
			,
				'disabled'     => $field['disabled'],
				'attr'         => $field['attr']
				// Any  additional attributes, if this radio | checkbox element
			,
				'legend'       => wp_kses_post( $field['title'] )
				// aria-label parameter
			,
				'value'        => $field['value']
				// Some Value from optins array that selected by default
			,
				'selected'     => ( ( 'On' == $field['value'] ) ? true : false )
				// Selected or not

				//, 'onfocus' 	=>  "console.log( 'ON FOCUS:',  jQuery( this ).is(':checked') , 'in element:' , jQuery( this ) );"					// JavaScript code
				//, 'onchange' 	=> "wpbc_ajx_booking_send_search_request_with_params( {'ui_usr__send_emails': (jQuery( this ).is(':checked') ? 'send' : 'not_send') } );"					// JavaScript code
				//, 'hint' 		=> array( 'title' => __('Send email notification to customer about this operation' ,'booking') , 'position' => 'top' )
			);
			$params_checkbox = wp_parse_args( $params_checkbox, $field );
			wpbc_flex_toggle( $params_checkbox );

			?>
			<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend><?php

			echo ( $field['is_new_line'] ) ? '<br/>' : '&nbsp; &nbsp; &nbsp;';
			echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) );

		} else {

			?>
			<legend class="screen-reader-text"><span><?php
				echo wp_kses_post( $field['title'] ); ?></span></legend>
		<label class="wpbc-form-checkbox" for="<?php
		echo esc_attr( $field_name ); ?>">
			<input type="checkbox"
				   id="<?php
				   echo esc_attr( $field_name ); ?>"
				   name="<?php
				   echo esc_attr( $field_name ); ?>"
				   value="<?php
				   echo esc_attr( $field['value'] ); ?>"
				   class="<?php
				   echo esc_attr( $field['class'] ); ?>"
				   style="<?php
				   echo esc_attr( $field['css'] ); ?>"
				<?php
				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				echo self::get_custom_attr_static( $field ); ?>
				<?php
				checked( $field['value'], 'On' ); ?>
				<?php
				disabled( $field['disabled'], true ); ?>
				   autocomplete="off"
			/> <?php
			echo wp_kses_post( $field['label'] ); ?></label><?php
			echo ( $field['is_new_line'] ) ? '<br/>' : '&nbsp; &nbsp; &nbsp;'; ?>
			<?php
			echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?><?php
		}

		if ( ! $field['only_field'] ) {
			?></fieldset></td>
			</tr><?php

		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	// -----------------------------------------------------------------------------------------------------------------
	// Text, Help, HTML, JS Elements
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 *  Help Info Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_help_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_help_row_static( $field_name, $field, $echo );
		} else {
			self::field_help_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Static Help Info Row
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_help_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'value'           => array(),
			'class'           => '',
			'css'             => '',
			'description'     => '',
			'cols'            => 1,
			'group'           => 'general',
			'tr_class'        => '',
			'description_tag' => 'span',
			'only_field'      => false
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		if ( ! $field['only_field'] ) {

			?><tr valign="top" class="wpbc_tr_<?php
			echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<?php
			if ( $field['cols'] == 1 ) { ?>
				<th scope="row"></th>
				<td>
			<?php
			} else { ?>
				<td colspan="2">
			<?php
			}
		}
		?>
		<div class="wpbc-help-message <?php
		echo esc_attr( $field['class'] ); ?>" style="margin-top:10px; <?php
		echo esc_attr( $field['css'] ); ?>">
		<?php
		$field['value'] = (array) $field['value'];

		foreach ( $field['value'] as $help_text ) {
			?><p class="description" style="font-weight: 400;"><?php
			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo $help_text;

			?></p><?php
		}
		?>
		</div>
		<?php
		echo wp_kses_post( self::description_static( $field, $field['description_tag'] ) ); ?>
		<?php
		if ( ! $field['only_field'] ) { ?>
			</td>
			</tr>
			<?php
		}

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  Horizontal Separator
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_hr_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_hr_row_static( $field_name, $field, $echo );
		} else {
			self::field_hr_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Static Horizontal Separator
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_hr_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'class'    => '',
			'css'      => '',
			'group'    => 'general',
			'tr_class' => ''
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		?>
		<tr valign="top" class="wpbc_tr_<?php
		echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<td style="padding:10px 0px; " colspan="2">
				<div class="<?php
				echo esc_attr( $field['class'] ); ?>" style="border-bottom:1px solid #cccccc;<?php
				echo esc_attr( $field['css'] ); ?>"></div>
			</td>
		</tr>
		<?php

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  HTML Row - show any html. Warning parameter html do not escaped,  check  it before assign.
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_html_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_html_row_static( $field_name, $field, $echo );
		} else {
			self::field_html_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Static HTML Row - show any html. Warning parameter html do not escaped,  check  it before assign.
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_html_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'html'     => '',
			'cols'     => 1,
			'group'    => 'general',
			'tr_class' => ''
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		?>
		<tr valign="top" class="wpbc_tr_<?php
		echo esc_attr( $field_name ), ' ', esc_attr( $field['tr_class'] ); ?>">
			<?php
			if ( $field['cols'] == 1 ) { ?>
			<th scope="row"></th>
			<td>
				<?php
				} else { ?>
			<td colspan="2">
				<?php
				} ?>
				<?php
				// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
				echo $field['html'];
				?>
			</td>
		</tr>
		<?php

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  HTML  - show only this html, Without any Table Rows. Warning parameter html do not escaped,  check  it before assign.
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_pure_html_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_pure_html_row_static( $field_name, $field, $echo );
		} else {
			self::field_pure_html_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Static HTML  - show only this html, Without any Table Rows. Warning parameter html do not escaped,  check  it before assign.
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_pure_html_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'html'  => '',
			'group' => 'general'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}

		// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		echo  $field['html'] ;

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	/**
	 *  JavaScript Row - insert JavaScript
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public function field_js_row( $field_name, $field, $echo = true ) {
		if ( ! $echo ) {
			return self::field_js_row_static( $field_name, $field, $echo );
		} else {
			self::field_js_row_static( $field_name, $field, $echo );
		}
	}


	/**
	 *  Static JavaScript Row - insert JavaScript
	 *
	 * @param string  $field_name - name of field
	 * @param array   $field      - parameters
	 * @param boolean $echo       - show or return reaults {default true}
	 *
	 * @return string - html || nothing
	 */
	public static function field_js_row_static( $field_name, $field, $echo = true ) {

		$defaults = array(
			'js'    => '',
			'group' => 'general'
		);

		$field = wp_parse_args( $field, $defaults );

		if ( ! $echo ) {
			ob_start();
		}
		?>
		<script type="text/javascript">
			<?php
			// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
			echo $field['js']; ?>
		</script>
		<?php

		if ( ! $echo ) {
			return ob_get_clean();
		}
	}


	// -----------------------------------------------------------------------------------------------------------------
	// Support functions
	// -----------------------------------------------------------------------------------------------------------------
	/**
	 * Get custom attributes
	 *
	 * @param array $field
	 *
	 * @return string
	 */
	public static function get_custom_attr_static( $field ) {

		$attributes = array();

		if ( ! empty( $field['attr'] ) && is_array( $field['attr'] ) ) {

			foreach ( $field['attr'] as $attr => $attr_v ) {
				$attributes[] = esc_attr( $attr ) . '="' . esc_attr( $attr_v ) . '"';
			}
		}

		return implode( ' ', $attributes );
	}


	/**
	 * Get Description
	 *
	 * @param array  $field
	 * @param string $html_tag - HTML element,  which will be used as separator. Default - 'p'
	 *
	 * @return string
	 */
	public static function description_static( $field, $html_tag = 'p' ) {
		if ( empty( $html_tag ) ) {
			$html_tag = 'p';
		}

		return $field['description']
			? '<' . $html_tag . ' class="description">' . wp_kses_post( $field['description'] ) . '</' . $html_tag . '>' . "\n"
			: '';
	}

	public static function label_static( $field_name, $field ) {

		if ( empty( $field['title'] ) ) {
			return '';
		}

		$defaults = array(
			'title'       => '',
			'label_class' => '',
			'label_css'   => '',
			'type'        => ''
		);
		$field = wp_parse_args( $field, $defaults );

		if ( ! empty( $field['type'] ) ) {
			$field['label_class'] .= ' wpbc-form-' . $field['type'];
		}

		if ( ! empty( $field['label_css'] ) ) {
			$field['label_css'] = ' style="' . $field['label_css'] . '"';
		}

		return '<label for="' . esc_attr( $field_name ) . '" class="' . $field['label_class'] . '"' . $field['label_css'] . '>' . wp_kses_post( $field['title'] ) . '</label>';
	}

	// </editor-fold>

    
	// -----------------------------------------------------------------------------------------------------------------
    // Validate POSTs
	// -----------------------------------------------------------------------------------------------------------------
    /**
     * Validate Settings Field Data.
     *
     * Validate the data on the "Settings" form.
     *
     * @since 1.0.0
     * @uses method_exists()
     * @param array $form_fields (default: array())
     */
    public function validate_post( $form_fields = array() ) {

        // Check  server restrictions in php.ini file relative to  length of $_POST variabales
        if (  function_exists ('wpbc_check_post_key_max_number')) { wpbc_check_post_key_max_number(); }

        if ( ! $form_fields ) {
            $form_fields = $this->get_form_fields();
        }

        $this->validated_fields = array();

        foreach ( $form_fields as $k => $v ) {

            if ( ! empty( $v['is_demo_safe'] ) ) {                              // Skip saving values for fields with  this parameter ( 'is_demo_safe' => true )
                    continue;
            }
            
            if ( empty( $v['type'] ) ) {
                $v['type'] = 'text'; 
            }

            // Look for a validate_FIELDID_post method for special handling
            if ( method_exists( $this, 'validate_' . $k . '_post' ) ) {
                $field = $this->{'validate_' . $k . '_post'}( $this->id . '_' . $k );
                $this->validated_fields[ $k ] = $field;

            // Look for a validate_FIELDTYPE_post method
            } elseif ( method_exists( $this, 'validate_' . $v['type'] . '_post' ) ) {
                $field = $this->{'validate_' . $v['type'] . '_post'}( $this->id . '_' . $k );
                $this->validated_fields[ $k ] = $field;

            // Default to text
            } else {
                // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
                if ( isset( $_POST[ $this->id . '_' . $k ] ) ) {                            //Check this for non Fields elements,  like simple HTML or TEXT or JS
                    $field = $this->{'validate_text_post'}( $this->id . '_' . $k );
                    $this->validated_fields[ $k ] = $field;
                }
            }
        }
        
        return $this->validated_fields;
    }


    // <editor-fold     defaultstate="collapsed"                        desc=" V a l i d a t e    P O S T    F i e l d s "  >
    
    /**
     * Validate Text in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public function validate_text_post( $post_key ) {
        return self::validate_text_post_static( $post_key );
    }

	// FixIn: 10.14.2.2
    /**
     * Validate Color: '#ff00ff' in POST request - escape data correctly.
     *
     * @param string $post_key - key for POST
     * @return string | false,  if no such POST
     */
    public function validate_color_post( $post_key ) {
        return self::validate_color_static( $post_key );
    }


	// FixIn: 10.14.2.2
    /**
     * Static Validate Color field in POST request - escape data correctly.
     *
     * @param string $post_key - key for POST
     * @return string | false,  if no such POST
     */
    public static function validate_color_static( $post_key ) {

        $value = '';

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
        if ( isset( $_POST[ $post_key ] ) ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
            $value = sanitize_hex_color( trim( stripslashes( $_POST[ $post_key ] ) ) );
			if ( null === $value ) {
				$value = '';
			}
        }

        return $value;
    }


    /**
     * Static Validate Text in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public static function validate_text_post_static( $post_key, $post_index = false ) {

        $value = false;
	    // FixIn: 9.2.4.2.
	    // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
	    if ( isset( $_POST[ $post_key ] ) ) {
		    if ( $post_index !== false ) {
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.InputNotValidated
			    $post_value = $_POST[ $post_key ][ $post_index ];
		    } else {
				// phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, WordPress.Security.ValidatedSanitizedInput.InputNotValidated
			    $post_value = $_POST[ $post_key ];
		    }
	    }

        if ( isset( $post_value ) ) {

            $value = wp_kses_post( trim( stripslashes( $post_value ) ) );
        }

        return $value;
    }        


    /**
     * Validate Email field in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public function validate_email_post( $post_key ) {
        return self::validate_email_post_static( $post_key );
    }

    
    /**
     * Static Validate Email field in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public static function validate_email_post_static( $post_key ) {

        $value = false;

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
        if ( isset( $_POST[ $post_key ] ) ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
            $value = sanitize_email( trim( stripslashes( $_POST[ $post_key ] ) ) );
        }

        return $value;
    }    
        
    
    /**
     * Validate Textarea in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public function validate_textarea_post( $post_key ) {
        return self::validate_textarea_post_static( $post_key );
    }
    
    
    /**
     * Static Validate Textarea in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public static function validate_textarea_post_static( $post_key ) {

        $value = false;

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
        if ( isset( $_POST[ $post_key ] ) ) {

			// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
            $value = wp_kses(   trim( stripslashes( $_POST[ $post_key ] ) ),
                                array_merge(
                                                array(
                                                        'iframe' => array( 'src' => true, 'style' => true, 'id' => true, 'class' => true )
                                                ),
                                                wp_kses_allowed_html( 'post' )
                                )
                    );
        }

            return $value;
    }


    /**
     * Validate WP Textarea in POST request - escape data correctly.     
     * 
     * Same as Textarea
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public function validate_wp_textarea_post( $post_key ){
        return self::validate_wp_textarea_post_static( $post_key );
    }

    
    /**
     * Static Validate WP Textarea in POST request - escape data correctly.     
     * 
     * Same as Textarea
     *
     * @param string $post_key - key for POST 
     * @return string | false,  if no such POST
     */
    public static function validate_wp_textarea_post_static( $post_key ){
        return self::validate_textarea_post_static( $post_key );
    }

    
    /**
     * Validate Checkbox in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string: 'On' | 'Off'
     */
    public function validate_checkbox_post( $post_key ) {
        return self::validate_checkbox_post_static( $post_key );
    }
    
    
    /**
     * Static Validate Checkbox in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string: 'On' | 'Off'
     */
    public static function validate_checkbox_post_static( $post_key ) {

        $status = 'Off';

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
        if (  isset( $_POST[ $post_key ] ) && ( in_array( $_POST[ $post_key ], array( 'On', 'Off' ) ) )  ) {
            $status = 'On';
        }

        return $status;
    }
    
    
    /**
     * Validate Select in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | array | false,  if no such POST
     */
    public function validate_select_post( $post_key ) {
        return self::validate_select_post_static( $post_key );
    }
    
    
    /**
     * Static Validate Select in POST request - escape data correctly.     
     *
     * @param string $post_key - key for POST 
     * @return string | array | false,  if no such POST
     */
    public static function validate_select_post_static( $post_key ) {

        $value = false;

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
        if ( isset( $_POST[ $post_key ] ) ) {
            
            // phpcs:ignore WordPress.Security.NonceVerification.Recommended, WordPress.Security.NonceVerification.Missing
            if ( is_array(  $_POST[ $post_key ] ) ) {
				// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
                $value = array_map( 'sanitize_text_field', array_map( 'stripslashes', (array) $_POST[ $post_key ] ) );
            } else {
				// phpcs:ignore WordPress.Security.NonceVerification.Missing, WordPress.Security.ValidatedSanitizedInput.MissingUnslash, WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
                $value = sanitize_text_field( stripslashes( $_POST[ $post_key ] ) );
            }
        }

        return $value;
    }
    

    /**
     * Validate Radio in POST request - escape data correctly.  
     * 
     * Its the same as Select field   
     *
     * @param string $post_key - key for POST 
     * @return string | array | false,  if no such POST
     */
    public function validate_radio_post( $post_key ) {
        return self::validate_radio_post_static( $post_key );
    }
    
    
    /**
     * Static Validate Radio in POST request - escape data correctly.  
     * 
     * Its the same as Select field   
     *
     * @param string $post_key - key for POST 
     * @return string | array | false,  if no such POST
     */
    public static function validate_radio_post_static( $post_key ) {
        return self::validate_select_post_static( $post_key );
    }
        
    // </editor-fold>
    
	// -----------------------------------------------------------------------------------------------------------------
    // Save | Get from DB
	// -----------------------------------------------------------------------------------------------------------------
    /**
     * Save Setting Options to DB,  then Reinit Settings Fields with  these new Values...
     * 
     * @param string $settings_id - ID of the settings
     * @param array $validated_fields  - List of validated fields in format array( field_name => field_value, ... )
     * @param string $how_to_save      - 'togather' - default - save as one field | 'separately_with_prefix' - save separately but with adding settings_id |  'separately' - separately  each  field only with adding db  prefix
     */    
    public function save_to_db( $validated_fields ){       
            
        $settings_id = $this->get_id();
        
        $how_to_save = $this->options['db_saving_type'];
            
        
        if ( $how_to_save == 'togather' ) {
                                                                                /* wpbc_ settings_general = 
                                                                                                            Array (
                                                                                                                    [date_format] => F j, Y
                                                                                                                    [time_format] => H:i
                                                                                                                    [hr_time_format] => 
                                                                                                            ) */
            update_bk_option( $this->options['db_prefix_option'] . $settings_id , $validated_fields );
            
        } elseif ( $how_to_save == 'separate_prefix' ) {                        // wpbc_ settings_general_ date_format => F j, Y
                        
            foreach ( (array) $validated_fields as $field_name => $field_value ) {
                update_bk_option( $this->options['db_prefix_option'] . $settings_id . '_' . $field_name , $field_value );
            }
        } else {                                                                // $how_to_save == 'separate' // wpbc_ date_format => F j, Y            

            foreach ( (array) $validated_fields as $field_name => $field_value ) {
                update_bk_option( $this->options['db_prefix_option'] . $field_name , $field_value );
            }
        } 
          
        
        // Redefine fields values for New Saved values
        $this->define_fields_values( $validated_fields , false );
        
        // Set Values for the fields
        $this->set_values_to_fields();                                          // Assign $this->fields_values['some_field']   to  $this->fields[ 'some_field' ]['value']          
        
        
        $this->fields = apply_filters( 'wpbc_fields_after_saving_to_db', $this->fields, $this->id );
        
//debuge('After Saving to DB', $this->fields_values, $this->fields);        
    }    
    
    
    public function define_fields_values_from_db() {
                
        $how_to_save = $this->options['db_saving_type'];
        
        switch ( $how_to_save ) {
            
            case 'togather':
                
                $fields_values_from_db = get_bk_option( $this->options['db_prefix_option'] . $this->get_id() );

                $this->define_fields_values( $fields_values_from_db );          // Define Fields by values from DB                
                
                break;
            
            case 'separate_prefix':
                    
                $this->define_fields_values();                                  // Reinit Fields - need to know how many fields and names of fields            

                $fields_values_from_db = array();

                foreach ( $this->fields_values as $field_name => $field_value ) {

                    $got_value = get_bk_option( $this->options['db_prefix_option'] . $this->get_id() . '_' . $field_name );
                    
                    // If we do not have this value in DB ( === false ), then do not assing this value - will have  Default Value
                    if ( $got_value !== false )
                         $fields_values_from_db[ $field_name ] = $got_value;
                }

                $this->define_fields_values( $fields_values_from_db );          // Define Fields by values from DB                

                break;
            
            default:    // 'separate'
                    
                $this->define_fields_values();                                  // Reinit Fields - need to know how many fields and names of fields            

                $fields_values_from_db = array();
//debuge('Before Loading from DB', $this->fields_values, $this->fields);
                foreach ( $this->fields_values as $field_name => $field_value ) {

                    $got_value = get_bk_option( $this->options['db_prefix_option'] . $field_name );
                    
                    // If we do not have this value in DB ( === false ), then do not assing this value - will have  Default Value
                    if ( $got_value !== false )
                         $fields_values_from_db[ $field_name ] = $got_value;
                }

                $this->define_fields_values( $fields_values_from_db );          // Define Fields by values from DB
//debuge('After loaded from DB', $this->fields_values, $this->fields);                
                break;
        }
        
    }
    

    
	// -----------------------------------------------------------------------------------------------------------------
    //  Install | Uninstall   
	// -----------------------------------------------------------------------------------------------------------------
    /**  Actiovation of Plugin. Save to DB initial values of Settings Fields. */    
    public function activate() {

        $settings_id = $this->get_id();
        
        $how_to_save = $this->options['db_saving_type'];
            
        
        $default_values = $this->get_default_values();                          // Get "Default" values from $this->fields array.
        
        if ( $how_to_save == 'togather' ) {
                                                                                /* wpbc_ settings_general = 
                                                                                                            Array (
                                                                                                                    [date_format] => F j, Y
                                                                                                                    [time_format] => H:i
                                                                                                                    [hr_time_format] => 
                                                                                                            ) */
            add_bk_option( $this->options['db_prefix_option'] . $settings_id , $default_values );

        } elseif ( $how_to_save == 'separate_prefix' ) {                        // wpbc_ settings_general_ date_format => F j, Y

            foreach ( (array) $default_values as $field_name => $field_value ) {
                add_bk_option( $this->options['db_prefix_option'] . $settings_id . '_' . $field_name , $field_value );
            }
        } else {                                                                // $how_to_save == 'separate' // wpbc_ date_format => F j, Y            

            foreach ( (array) $default_values as $field_name => $field_value ) {
                add_bk_option( $this->options['db_prefix_option'] . $field_name , $field_value );
            }
        } 
    }

    
    /** Uninstall. Deactivation of Plugin. Delete Settings Fields from DB. */
    public function deactivate() {
        
        $settings_id = $this->get_id();
        
        $how_to_save = $this->options['db_saving_type'];
        
        $default_values = $this->get_default_values();                          // Get "Default" values from $this->fields array.
        
        
        if ( $how_to_save == 'togather' ) {
                                                                                /* wpbc_ settings_general = 
                                                                                                            Array (
                                                                                                                    [date_format] => F j, Y
                                                                                                                    [time_format] => H:i
                                                                                                                    [hr_time_format] => 
                                                                                                            ) */
            delete_bk_option( $this->options['db_prefix_option'] . $settings_id );

        } elseif ( $how_to_save == 'separate_prefix' ) {                        // wpbc_ settings_general_ date_format => F j, Y

            foreach ( (array) $default_values as $field_name => $field_value ) {
                delete_bk_option( $this->options['db_prefix_option'] . $settings_id . '_' . $field_name );
            }
        } else {                                                                // $how_to_save == 'separate' // wpbc_ date_format => F j, Y            

            foreach ( (array) $default_values as $field_name => $field_value ) {
                delete_bk_option( $this->options['db_prefix_option'] . $field_name );
            }
        }         
    }    
    
}