private function convert_to_audio()

in admin/class-amazonpolly-admin.php [637:760]

• 91 lines of code
• 13 McCabe index (conditional complexity)

	private function convert_to_audio( $post_id, $sample_rate, $voice_id, $sentences, $wp_filesystem, $lang ) {

		foreach ( $this->translate_langs as $lan ) {
			if ( $lan == $lang ) {
				$voice_id = get_option( 'amazon_polly_trans_langs_' . $lan . '_voice' );
			}
		}

		$sample_rate_values = array( '24000', '22050', '16000', '8000' );
		if ( ! in_array( $sample_rate, $sample_rate_values, true ) ) {
			$sample_rate = '24000';
		}

		$upload_dir           = wp_upload_dir()['basedir'];
		$file_prefix          = 'amazon_polly_';
		$file_name            = $file_prefix . $post_id . $lang . '.mp3';
		$file_temp_full_name  = trailingslashit($upload_dir) . 'temp_' . $file_name;

		$dir_final_full_name  = trailingslashit($upload_dir);
		if ( get_option('uploads_use_yearmonth_folders') ) {
		   $dir_final_full_name .= get_the_date( 'Y', $post_id ) . '/' . get_the_date( 'm', $post_id ) . "/";
		}
		$file_final_full_name = $dir_final_full_name . $file_name;

		// Delete temporary file if already exists.
		if ( $wp_filesystem->exists( $file_temp_full_name ) ) {
			$wp_filesystem->delete( $file_temp_full_name );
		}
		// Delete final file if already exists.
		if ( $wp_filesystem->exists( $file_final_full_name ) ) {
			$wp_filesystem->delete( $file_final_full_name );
		}
		$first_part = true;

		foreach ( $sentences as $key => $text_content ) {

			// Depending on the plugin configuration SSML tags for automated breaths sound will be added.
			$is_breaths_enabled = $this->amazon_polly_is_auto_breaths_enabled();
			if ( $is_breaths_enabled ) {
				$text_content = '<amazon:auto-breaths>' . $text_content . '</amazon:auto-breaths>';
			}

			// If plugin SSML support option is enabled, plugin will try to decode all SSML tags.
			$is_ssml_enabled = $this->amazon_polly_is_ssml_enabled();
			if ( $is_ssml_enabled ) {
				$text_content = $this->amazon_polly_decode_ssml_tags( $text_content );
			}
			$text_content = str_replace( '**AMAZONPOLLY*SSML*BREAK*time=***500ms***SSML**', '<break time="500ms"/>', $text_content );
			$text_content = str_replace( '**AMAZONPOLLY*SSML*BREAK*time=***1s***SSML**', '<break time="500ms"/>', $text_content );

			$amazon_polly_mark_value = 'wp-plugin-awslabs';
			$amazon_polly_mark_value = apply_filters( 'amazon_polly_mark_value', $amazon_polly_mark_value );

			$ssml_text_content = '<speak><mark name="' . esc_attr( $amazon_polly_mark_value ) . '"/>' . $text_content . '</speak>';

			$lexicons       = $this->get_lexicons();
			$lexicons_array = explode( ' ', $lexicons );

			if ( ! empty( $lexicons ) and ( count( $lexicons_array ) > 0 ) ) {

				$result = $this->polly_client->synthesizeSpeech(
					array(
						'OutputFormat' => 'mp3',
						'SampleRate'   => $sample_rate,
						'Text'         => $ssml_text_content,
						'TextType'     => 'ssml',
						'VoiceId'      => $voice_id,
						'LexiconNames' => $lexicons_array,
					)
				);
			} else {

				$result = $this->polly_client->synthesizeSpeech(
					array(
						'OutputFormat' => 'mp3',
						'SampleRate'   => $sample_rate,
						'Text'         => $ssml_text_content,
						'TextType'     => 'ssml',
						'VoiceId'      => $voice_id,
					)
				);
			}//end if

			// Grab the stream and output to a file.
			$contents = $result['AudioStream']->getContents();
			// Save first part of the audio stream in the parial temporary file.
			$wp_filesystem->put_contents( $file_temp_full_name . '_part_' . $key, $contents );
			// Merge new temporary file with previous ones.
			if ( $first_part ) {
				$wp_filesystem->put_contents( $file_temp_full_name, $contents );
				$first_part = false;
			} else {
				$this->remove_id3( $file_temp_full_name . '_part_' . $key );
				$merged_file = $wp_filesystem->get_contents( $file_temp_full_name ) . $wp_filesystem->get_contents( $file_temp_full_name . '_part_' . $key );
				$wp_filesystem->put_contents( $file_temp_full_name, $merged_file );
			}
			// Deleting partial audio file.
			$wp_filesystem->delete( $file_temp_full_name . '_part_' . $key );
		}//end foreach

		// Saving audio file in final destination.
		$fileHandler = $this->getFileHandler();
		$audio_location_link = $fileHandler->save($wp_filesystem, $file_temp_full_name, $dir_final_full_name, $file_final_full_name, $post_id, $file_name);

		// This will bust the browser cache when a content revision is made.
		$audio_location_link = add_query_arg( 'version', time(), $audio_location_link );

		// We are using a hash of these values to improve the speed of queries.
		$amazon_polly_settings_hash = md5( $voice_id . $sample_rate . $fileHandler->get_type() );

		if ( $lang == '' ) {
			update_post_meta( $post_id, 'amazon_polly_audio_link_location', $audio_location_link );
			update_post_meta( $post_id, 'amazon_polly_audio_location', $fileHandler->get_type() );
		} else {
			update_post_meta( $post_id, 'amazon_polly_translation_' . $lang, '1' );
		}

		// Update post meta data.
		update_post_meta( $post_id, 'amazon_polly_enable', 1 );
		update_post_meta( $post_id, 'amazon_polly_voice_id', get_option( 'amazon_polly_voice_id' ) );
		update_post_meta( $post_id, 'amazon_polly_sample_rate', $sample_rate );
		update_post_meta( $post_id, 'amazon_polly_settings_hash', $amazon_polly_settings_hash );

	}