Change a few things in the AWS Polly integration to take advantage of…

… the changes made in the TTS feature, standardizing on how all these providers work

includes/Classifai/Providers/AWS/AmazonPolly.php

@@ -9,7 +9,6 @@
 namespace Classifai\Providers\AWS;
 
 use Classifai\Providers\Provider;
-use Classifai\Normalizer;
 use Classifai\Features\TextToSpeech;
 use WP_Error;
 use Aws\Sdk;
@@ -18,14 +17,6 @@ class AmazonPolly extends Provider {
 
 	const ID = 'aws_polly';
 
-	/**
-	 * Meta key to get/set the audio hash that helps to indicate if there is any need
-	 * for the audio file to be regenerated or not.
-	 *
-	 * @var string
-	 */
-	const AUDIO_HASH_KEY = '_classifai_post_audio_hash';
-
 	/**
 	 * AmazonPolly Text to Speech constructor.
 	 *
@@ -374,12 +365,10 @@ public function synthesize_speech( int $post_id ) {
 			);
 		}
 
-		$normalizer          = new Normalizer();
 		$feature             = new TextToSpeech();
 		$settings            = $feature->get_settings();
-		$post                = get_post( $post_id );
-		$post_content        = $normalizer->normalize_content( $post->post_content, $post->post_title, $post_id );
-		$content_hash        = get_post_meta( $post_id, self::AUDIO_HASH_KEY, true );
+		$post_content        = $feature->normalize_post_content( $post_id );
+		$content_hash        = get_post_meta( $post_id, TextToSpeech::AUDIO_HASH_KEY, true );
 		$saved_attachment_id = (int) get_post_meta( $post_id, $feature::AUDIO_ID_KEY, true );
 
 		// Don't regenerate the audio file it it already exists and the content hasn't changed.
@@ -453,7 +442,7 @@ public function synthesize_speech( int $post_id ) {
 			$polly_client = $this->get_polly_client();
 			$result       = $polly_client->synthesizeSpeech( $synthesize_data );
 
-			update_post_meta( $post_id, self::AUDIO_HASH_KEY, md5( $post_content ) );
+			update_post_meta( $post_id, TextToSpeech::AUDIO_HASH_KEY, md5( $post_content ) );
 			$contents = $result['AudioStream']->getContents();
 			return $contents;
 		} catch ( \Exception $e ) {