WIP: Add typehint checking

inc/class-options-page.php

+<?php
+/**
+ * Plugin options page
+ *
+ * @package Camo_Image_Proxy
+ */
+
+namespace Camo_Image_Proxy;
+
+/**
+ * Class Options_Page
+ */
+class Options_Page {
+	use Singleton;
+
+	/**
+	 * Settings screen section
+	 *
+	 * @var string
+	 */
+	private $section = 'camp-image-proxy';
+
+	/**
+	 * Field labels
+	 *
+	 * @var array
+	 */
+	private $labels = [];
+
+	/**
+	 * Option name
+	 *
+	 * @var string
+	 */
+	private $name;
+
+	/**
+	 * Hooks
+	 */
+	public function setup() {
+		$this->name = Options::instance()->name;
+
+		$this->labels['host'] = __( 'Host', 'camo-image-proxy' );
+		$this->labels['key']  = __( 'Shared Key', 'camo-image-proxy' );
+
+		add_action( 'admin_init', [ $this, 'action_admin_init' ] );
+	}
+
+	/**
+	 * Add fields to Media settings page
+	 */
+	public function action_admin_init() {
+		register_setting( 'media', $this->name, [ Options::instance(), 'sanitize_all' ] );
+		add_settings_section( $this->section, __( 'Camo Image Proxy', 'camo-image-proxy' ), '__return_false', 'media' );
+
+		foreach ( $this->labels as $key => $label ) {
+			$args = [
+				'option' => $key,
+				'label'  => $label,
+			];
+			add_settings_field( $key, $label, [ $this, 'screen' ], 'media', $this->section, $args );
+		}
+	}
+
+	/**
+	 * Render options field
+	 *
+	 * @param array $args Field arguments.
+	 */
+	public function screen( $args ) {
+		$value      = Options::instance()->get( $args['option'] );
+		$input_type = 'host' === $args['option'] ? 'url' : 'text';
+		$name       = sprintf( '%1$s[%2$s]', $this->name, $args['option'] );
+		$html_id    = sprintf( '%1$s-%2$s', str_replace( '_', '-', $this->name ), $args['option'] );
+
+		?>
+		<input
+			type="<?php echo esc_attr( $input_type ); ?>"
+			name="<?php echo esc_attr( $name ); ?>"
+			class="regular-text"
+			id="<?php echo esc_attr( $html_id ); ?>"
+			value="<?php echo esc_attr( $value ); ?>"
+		/>
+		<?php
+	}
+}