InputSelect.php

<?php

namespace ACFQuickEdit\Fields\Traits;

trait InputSelect {

	/**
	 *	Render Input element
	 *
	 *	@param array $input_attr
	 *	@param bool $is_quickedit
	 *
	 *	@return string
	 */
	public function render_select_input( $input_atts, $acf_field, $is_quickedit = true ) {
		$output = '';

		$acf_field = wp_parse_args( $acf_field, [
			'choices' => [],
			'other_choice' => 0,
		]);

		$input_atts += [
			'class' => 'acf-quick-edit widefat',
			'id' => $this->core->prefix( $acf_field['key'] ),
			'data-ui'			=> $acf_field['ui'],
			'data-ajax'			=> $acf_field['ajax'],
			'data-type'			=> $acf_field['type'],//'select',
			'data-multiple'		=> $acf_field['multiple'],
			'data-allow_null'	=> $acf_field['allow_null'],
		];

		$output .= acf_get_hidden_input( [
			'name'	=> $input_atts['name'],
		]);

		if ( $acf_field['multiple'] ) {
			$input_atts['multiple'] = 'multiple';
			$input_atts['name']	.= '[]';
		}

		if ( $acf_field['ui'] ) {
			$input_atts['class'] .= ' ui';
			$input_atts['data-nonce'] = wp_create_nonce( 'acf_field_' . $acf_field['type'] . '_' . $acf_field['key'] );
			$input_atts['data-query-nonce'] = wp_create_nonce( $acf_field['key'] ); // backwards compatibility ACF < 6.3.1
		}

		$output .= sprintf( '<select %s>', acf_esc_attr( $input_atts ) ) . PHP_EOL;

		if ( ! $acf_field['ajax'] ) {

			if ( ! $acf_field['multiple'] && $acf_field['allow_null'] ) {
				$output .= sprintf('<option value="">%s</option>', __( '— Select —', 'acf-quickedit-fields' ) ) . PHP_EOL;
			}

			$output .= $this->render_select_options( $acf_field['choices'], null, (boolean) $acf_field['multiple'] );

		}

		$output .= '</select>' . PHP_EOL;

		return $output;
	}

	/**
	 *	@param array $choices
	 *	@param string $out
	 *	@param string $selected
	 *	@param boolean $is_multiple
	 */
	protected function render_select_options( $choices, $selected, $is_multiple = false, $value_cb = null ) {
		$out = '';
		foreach ( $choices as $value => $label ) {
			if ( is_array( $label ) ) {
				$out .= sprintf( '<optgroup label="%s">', esc_attr( $value ) ) . PHP_EOL;
				$out .= $this->render_select_options( $label, $selected, $is_multiple ) . PHP_EOL;
				$out .= '</optgroup>' . PHP_EOL ;
			} else {
				if ( is_callable( $value_cb ) ) {
					$value = $value_cb( $value );
				}
				$out .= sprintf(
					'<option value="%s" %s>%s</option>',
					esc_attr( $value ),
					$selected === $value
						? 'selected'
						: '',
					esc_html( $label )
				) . PHP_EOL;
			}
		}
		return $out;
	}


	/**
	 *	@inheritdoc
	 */
	public function sanitize_value( $value, $context = 'db' ) {

		$sanitation_cb = $context === 'ajax'
			? [ $this, 'sanitize_ajax_result' ]
			: 'sanitize_text_field';

		$value = $sanitation_cb( $value );

		return parent::sanitize_value( $value, $context );
	}

	/**
	 *	Format result data for select2
	 *
	 *	@param mixed $value
	 *	@return string|array If value present and post exists Empty string
	 */
	protected function sanitize_ajax_result( $value ) {
		// multiple x custom
		$values = $this->search_value_in_choices( $value, $this->acf_field['choices'] );

		if ( ( isset( $this->acf_field['multiple'] ) && $this->acf_field['multiple'] ) || 'checkbox' === $this->acf_field['type'] ) {
			$value = (array) $value;
			if (
				$this->acf_field['allow_custom'] && (
					! count( $values )
					|| count( $value ) > count( $values )
				)
			) {
				$values = array_merge(
					$values,
					array_map(
						function( $val ) {
							return [
								'id'   => sanitize_text_field( $val ),
								'text' => sanitize_text_field( $val ),
							];
						},
						$value
					)
				);
			}


		} else {
			// flatten single values
			$values = current( $values );
		}

		return $values;
	}

	/**
	 *	Search value-objects in multidimensional arrays
	 *
	 *	@param mixed $value
	 *	@return string|array If value present and post exists Empty string
	 */
	private function search_value_in_choices( $value, $choices, $ret = [] ) {
		foreach ( (array) $value as $val ) {
			if ( isset( $choices[$val] ) ) {
				$ret[] = [
					'id'   => sanitize_text_field( $val ),
					'text' => sanitize_text_field( $choices[ $val ] ),
				];
			}
		}
		// multidimensional arrays
		foreach ( $choices as $choice ) {
			if ( is_array( $choice ) ) {
				$ret = $this->search_value_in_choices( $value, $choice, $ret );
			}
		}
		return $ret;
	}
}