Integrations: Extract into separate classes

src/Integrations/class-amp.php

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+<?php
+/**
+ * AMP integration class
+ *
+ * @package Parsely\Integrations
+ * @since 2.6.0
+ */
+
+namespace Parsely\Integrations;
+
+/**
+ * Integrates Parse.ly tracking with the AMP plugin.
+ *
+ * @since 2.6.0 Moved from Parsely class to this file.
+ */
+class Amp implements Integration {
+	/**
+	 * Apply the hooks that integrate the plugin or theme with the Parse.ly plugin.
+	 *
+	 * @since 2.6.0
+	 */
+	public function integrate() {
+		if ( defined( 'AMP__VERSION' ) ) {
+			add_action( 'template_redirect', array( $this, 'add_actions' ) );
+		}
+	}
+
+	/**
+	 * Verify if request is an AMP request.
+	 *
+	 * This is needed to make it easier to mock whether the function exists ot not during tests.
+	 *
+	 * @codeCoverageIgnore
+	 *
+	 * @since 2.6.0
+	 *
+	 * @return bool True is an AMP request, false otherwise.
+	 */
+	public function is_amp_request() {
+		return function_exists( 'amp_is_request' ) && amp_is_request();
+	}
+
+	/**
+	 * Verify if request is an AMP request, and that AMP support is not disabled.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @return bool True is an AMP request and not disabled, false otherwise.
+	 */
+	public function can_handle_amp_request() {
+		$options = get_option( \Parsely::OPTIONS_KEY );
+
+		return $this->is_amp_request() && is_array( $options ) && ! $options['disable_amp'];
+	}
+
+	/**
+	 * Add AMP actions.
+	 *
+	 * @since 2.6.0
+	 */
+	public function add_actions() {
+		if ( $this->can_handle_amp_request() ) {
+			add_filter( 'amp_post_template_analytics', array( $this, 'register_parsely_for_amp_analytics' ) );
+			add_filter( 'amp_analytics_entries', array( $this, 'register_parsely_for_amp_native_analytics' ) );
+		}
+	}
+
+	/**
+	 * Register Parse.ly for AMP analytics.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param array $analytics The analytics registry.
+	 * @return array The analytics registry.
+	 */
+	public function register_parsely_for_amp_analytics( $analytics ) {
+		$options = get_option( \Parsely::OPTIONS_KEY );
+
+		if ( empty( $options['apikey'] ) ) {
+			return $analytics;
+		}
+
+		$analytics['parsely'] = array(
+			'type'        => 'parsely',
+			'attributes'  => array(),
+			'config_data' => array(
+				'vars' => array(
+					'apikey' => $options['apikey'],
+				),
+			),
+		);
+
+		return $analytics;
+	}
+
+	/**
+	 * Register Parse.ly for AMP native analytics.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param array $analytics The analytics registry.
+	 * @return array The analytics registry.
+	 */
+	public function register_parsely_for_amp_native_analytics( $analytics ) {
+		$options = get_option( \Parsely::OPTIONS_KEY );
+
+		if ( ! empty( $options['disable_amp'] ) && true === $options['disable_amp'] ) {
+			return $analytics;
+		}
+
+		if ( empty( $options['apikey'] ) ) {
+			return $analytics;
+		}
+
+		$analytics['parsely'] = array(
+			'type'       => 'parsely',
+			'attributes' => array(),
+			'config'     => wp_json_encode(
+				array(
+					'vars' => array(
+						'apikey' => $options['apikey'],
+					),
+				)
+			),
+		);
+
+		return $analytics;
+	}
+}

src/Integrations/class-facebook-instant-articles.php

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+<?php
+/**
+ * Facebook Instant Articles integration class
+ *
+ * @package Parsely\Integrations
+ * @since 2.6.0
+ */
+
+namespace Parsely\Integrations;
+
+/**
+ * Integrates Parse.ly tracking with the Facebook Instant Articles plugin.
+ *
+ * @since 2.6.0 Moved from Parsely class to this file.
+ */
+final class Facebook_Instant_Articles implements Integration {
+	const REGISTRY_IDENTIFIER   = 'parsely-analytics-for-wordpress';
+	const REGISTRY_DISPLAY_NAME = 'Parse.ly Analytics';
+
+	/**
+	 * Apply the hooks that integrate the plugin or theme with the Parse.ly plugin.
+	 *
+	 * @since 2.6.0
+	 */
+	public function integrate() {
+		if ( defined( 'IA_PLUGIN_VERSION' ) ) {
+			add_action( 'instant_articles_compat_registry_analytics', array( $this, 'insert_parsely_tracking' ) );
+		}
+	}
+
+	/**
+	 * Add Parse.ly tracking to Facebook instant articles.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param array $registry The registry info for fbia.
+	 * @return void
+	 */
+	public function insert_parsely_tracking( &$registry ) {
+		$options = get_option( \Parsely::OPTIONS_KEY );
+		if ( ! ( $options['apikey'] ) ) {
+			return;
+		}
+
+		$registry[ self::REGISTRY_IDENTIFIER ] = array(
+			'name'    => self::REGISTRY_DISPLAY_NAME,
+			'payload' => $this->get_embed_code( $options['apikey'] ),
+		);
+	}
+
+	/**
+	 * Get the payload / embed code.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string $api_key API key.
+	 * @return string Embedded code.
+	 */
+	public function get_embed_code( $api_key ) {
+		return '<script>
+			PARSELY = {
+				autotrack: false,
+				onload: function() {
+					PARSELY.beacon.trackPageView({
+						urlref: \'http://facebook.com/instantarticles\'
+					});
+					return true;
+				}
+			}
+		</script>
+		<script data-cfasync="false" id="parsely-cfg" data-parsely-site="' . esc_attr( $api_key ) . '" src="//cdn.parsely.com/keys/' . esc_attr( $api_key ) . '/p.js"></script>';
+	}
+}

src/Integrations/class-integration.php

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+<?php
+/**
+ * Integration interface
+ *
+ * @package Parsely\Integrations
+ * @since 2.6.0
+ */
+
+namespace Parsely\Integrations;
+
+/**
+ * Integration classes are expected to implement this interface.
+ *
+ * @since 2.6.0
+ */
+interface Integration {
+	/**
+	 * Apply the hooks that integrate the plugin or theme with the Parse.ly plugin.
+	 *
+	 * @since 2.6.0
+	 */
+	public function integrate();
+}

src/Integrations/class-integrations.php

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+<?php
+/**
+ * Integrations collection
+ *
+ * @package Parsely\Integrations
+ * @since   2.6.0
+ */
+
+namespace Parsely\Integrations;
+
+/**
+ * Integrations are registered to this collection.
+ *
+ * The integrate() method is called on each registered integration, on the init hook.
+ *
+ * @since 2.6.0
+ */
+class Integrations {
+	/**
+	 * Collection of registered integrations.
+	 *
+	 * @var array
+	 */
+	private $integrations = array();
+
+	/**
+	 * Register an integration.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string        $key             A unique identifier for the integration.
+	 * @param string|object $class_or_object Fully-qualified class name, or an instantiated object.
+	 *                             If a class name is passed, it will be instantiated.
+	 */
+	public function register( $key, $class_or_object ) {
+		// If a Foo::class or other FQCN is passed, instantiate it.
+		if ( ! is_object( $class_or_object ) ) {
+			$class_or_object = new $class_or_object();
+		}
+		$this->integrations[ $key ] = $class_or_object;
+	}
+
+	/**
+	 * Integrate each integration by calling the method that does the add_action() and add_filter() calls.
+	 *
+	 * @since 2.6.0
+	 */
+	public function integrate() {
+		foreach ( $this->integrations as $integration ) {
+			$integration->integrate();
+		}
+	}
+}