Astra_Target_Rules_Fields::generate_target_rule_selector( String $type, Array $selection_options, String $input_name, Array $saved_values, String $add_rule_label )

		public static function generate_target_rule_selector( $type, $selection_options, $input_name, $saved_values, $add_rule_label ) {

			$output = '<div class="target_rule-builder-wrap">';

			if ( ! is_array( $saved_values ) || ( is_array( $saved_values ) && empty( $saved_values ) ) ) {
				$saved_values                = array();
				$saved_values['rule'][0]     = '';
				$saved_values['specific'][0] = '';
			}

			$index = 0;

			foreach ( $saved_values['rule'] as $index => $data ) {

				$output .= '<div class="astra-target-rule-condition ast-target-rule-' . $index . '" data-rule="' . $index . '" >';
				/* Condition Selection */
				$output .= '<span class="target_rule-condition-delete dashicons dashicons-dismiss"></span>';
				$output .= '<div class="target_rule-condition-wrap" >';
				$output .= '<select name="' . esc_attr( $input_name ) . '[rule][' . $index . ']" class="target_rule-condition form-control ast-input">';
				$output .= '<option value="">' . __( 'Select', 'astra-addon' ) . '</option>';

				foreach ( $selection_options as $group => $group_data ) {

					$output .= '<optgroup label="' . $group_data['label'] . '">';
					foreach ( $group_data['value'] as $opt_key => $opt_value ) {

						// specific rules.
						$selected = '';

						if ( $data == $opt_key ) {
							$selected = 'selected="selected"';
						}

						$output .= '<option value="' . $opt_key . '" ' . $selected . '>' . $opt_value . '</option>';
					}
					$output .= '</optgroup>';
				}
				$output .= '</select>';
				$output .= '</div>';

				$output .= '</div>';

				/* Specific page selection */
				$output .= '<div class="target_rule-specific-page-wrap" style="display:none">';
				$output .= '<select name="' . esc_attr( $input_name ) . '[specific][]" class="target-rule-select2 target_rule-specific-page form-control ast-input " multiple="multiple">';

				if ( 'specifics' == $data && isset( $saved_values['specific'] ) && null != $saved_values['specific'] && is_array( $saved_values['specific'] ) ) {

					foreach ( $saved_values['specific'] as $data_key => $sel_value ) {
						// posts.
						if ( strpos( $sel_value, 'post-' ) !== false ) {
							$post_id    = (int) str_replace( 'post-', '', $sel_value );
							$post_title = get_the_title( $post_id );
							$output    .= '<option value="post-' . $post_id . '" selected="selected" >' . $post_title . '</option>';
						}

						// taxonomy options.
						if ( strpos( $sel_value, 'tax-' ) !== false ) {

							$tax_data = explode( '-', $sel_value );

							$tax_id    = (int) str_replace( 'tax-', '', $sel_value );
							$term      = get_term( $tax_id );
							$term_name = '';

							if ( ! is_wp_error( $term ) ) {
								$term_taxonomy = ucfirst( str_replace( '_', ' ', $term->taxonomy ) );

								if ( isset( $tax_data[2] ) && 'single' === $tax_data[2] ) {
									$term_name = 'All singulars from ' . $term->name;
								} else {
									$term_name = $term->name . ' - ' . $term_taxonomy;
								}
							}

							$output .= '<option value="' . $sel_value . '" selected="selected" >' . $term_name . '</option>';
						}
					}
				}
				$output .= '</select>';
				$output .= '</div>';
			}

			$output .= '</div>';

			/* Add new rule */
			$output .= '<div class="target_rule-add-rule-wrap">';
			$output .= '<a href="#" class="button" data-rule-id="' . absint( $index ) . '" data-rule-type="' . $type . '">' . $add_rule_label . '</a>';
			$output .= '</div>';

			if ( 'display' == $type ) {
				/* Add new rule */
				$output .= '<div class="target_rule-add-exclusion-rule">';
				$output .= '<a href="#" class="button">' . __( 'Add Exclusion Rule', 'astra-addon' ) . '</a>';
				$output .= '</div>';
			}

			return $output;
		}