#486 - Handle audio file no longer existing but is part of the post m…

…eta still.

includes/Classifai/Admin/SavePostHandler.php

@@ -200,8 +200,14 @@ public function synthesize_speech( $post_id ) {
 		$saved_attachment_id = (int) get_post_meta( $post_id, TextToSpeech::AUDIO_ID_KEY, true );
 
 		// Don't regenerate the audio file it it already exists and the content hasn't changed.
-		if ( $saved_attachment_id && ! empty( $content_hash ) && ( md5( $post_content ) === $content_hash ) ) {
-			return $saved_attachment_id;
+		if ( $saved_attachment_id ) {
+
+			// Check if the audio file exists.
+			$audio_attachment_url = wp_get_attachment_url( $saved_attachment_id );
+
+			if ( $audio_attachment_url && ! empty( $content_hash ) && ( md5( $post_content ) === $content_hash ) ) {
+				return $saved_attachment_id;
+			}
 		}
 
 		$voice        = $settings['voice'] ?? '';

includes/Classifai/Providers/Azure/TextToSpeech.php

@@ -530,6 +530,12 @@ public function render_post_audio_controls( $content ) {
 			return $content;
 		}
 
+		$audio_attachment_url = wp_get_attachment_url( $audio_attachment_id );
+
+		if ( ! $audio_attachment_url ) {
+			return $content;
+		}
+
 		wp_enqueue_script(
 			'classifai-post-audio-player-js',
 			CLASSIFAI_PLUGIN_URL . 'dist/post-audio-controls.js',
@@ -546,12 +552,11 @@ public function render_post_audio_controls( $content ) {
 			'all'
 		);
 
-		$audio_timestamp      = (int) get_post_meta( $post->ID, self::AUDIO_TIMESTAMP_KEY, true );
-		$audio_attachment_url = sprintf(
-			'%1$s?ver=%2$s',
-			wp_get_attachment_url( $audio_attachment_id ),
-			filter_var( $audio_timestamp, FILTER_SANITIZE_NUMBER_INT )
-		);
+		$audio_timestamp = (int) get_post_meta( $post->ID, self::AUDIO_TIMESTAMP_KEY, true );
+
+		if ( $audio_timestamp ) {
+			$audio_attachment_url = add_query_arg( 'ver', filter_var( $audio_timestamp, FILTER_SANITIZE_NUMBER_INT ), $audio_attachment_url );
+		}
 
 		ob_start();