public function content_filter()

in public/class-amazonpolly-public.php [100:229]

• 86 lines of code
• 20 McCabe index (conditional complexity)

	public function content_filter( $content ) {

		// Really strange case
		if (!isset($GLOBALS)) {
			return $content;
		} else {
			if (!array_key_exists('post', $GLOBALS)) {
				return $content;
			}
		}


		$post_id = $GLOBALS['post']->ID;
		$common = $this->common;

		$source_language = $common->get_post_source_language($post_id);
		$polly_content = '';
		$translate_options = '';


		// Check if Amazon Polly is enabled in WP, if yes then...
		if ( $common->is_polly_enabled() ) {

			// Check if Amazon Polly is enabled for specific post.
			if ( get_post_meta( $post_id, 'amazon_polly_enable', true ) === '1' ) {

				$audio_location    = get_post_meta( $post_id, 'amazon_polly_audio_link_location', true );
				$selected_autoplay = get_option( 'amazon_polly_autoplay' );
				$player_label      = get_option( 'amazon_polly_player_label' );

				// Checks if this is single post view and if there is autoplay options selected.
				if ( is_singular() && ! empty( $selected_autoplay ) ) {
					$autoplay = 'autoplay';
				} else {
					$autoplay = '';
				}


				// Prepare "Power By" label.
				$voice_by_part = '';
				if ( $common->is_poweredby_enabled() ) {
					if ( is_singular() ) {
						$image  = __('<img src="https://d12ee1u74lotna.cloudfront.net/images/Voiced_by_Amazon_Polly_EN.png" width="100" alt="Voiced by Amazon Polly" >', $this->plugin_name);
					/**
					 * Filters the voiced by Polly image HTML
					 *
					 * @param string $image Voiced by Polly image HTML
					 * @param string $locale The current page locale
					 */
					$image  = apply_filters('amazon_polly_voiced_by_html', $image, get_locale());
            $voice_by_part = '<a href="https://aws.amazon.com/polly/" target="_blank" rel="noopener noreferrer">' . $image . '</a>';
					}
				}

				// Removing Amazon Polly special tags.
				$content = $content;
				$content = preg_replace( '/-AMAZONPOLLY-ONLYAUDIO-START-[\S\s]*?-AMAZONPOLLY-ONLYAUDIO-END-/', '', $content );
				$content = str_replace( '-AMAZONPOLLY-ONLYWORDS-START-', '', $content );
				$content = str_replace( '-AMAZONPOLLY-ONLYWORDS-END-', '', $content );

				// Create player area.
				if ( is_singular() ) {

					// By default we will show default player.
					$audio_part = $this->include_audio_player( 'src', $audio_location, $autoplay );

					// Checks if Translate functionaliy is turned on.
					if ($common->is_translation_enabled() ) {
						// Checks if other than default langue is choosen.
						if(isset($_GET['amazonai-language'])) {

							// Retrievie selected language.
							$selected_language = $_GET['amazonai-language'];

							if ( $source_language != $selected_language ) {

								$audio_part = '';
								foreach ($common->get_all_polly_languages() as $language_code) {
									if ($language_code === $selected_language) {
										$audio_part = $this->include_audio_player( $selected_language, $audio_location, $autoplay );
									}
								}
							}
						}
					}

					$subscribe_part = $this->get_subscribe_part();


					$polly_content = '
					<table id="amazon-polly-audio-table">
						<tr>
						<td id="amazon-polly-audio-tab">
							<div id="amazon-ai-player-label">' . $player_label . '</div>
							' . $audio_part . '
							<div id="amazon-polly-subscribe-tab">' . $subscribe_part . '</div>
							<div id="amazon-polly-by-tab">' . $voice_by_part . '</div>
						</td>
						</tr>
					</table>';
				}
			}
		}


		// Will create 'translate' options and content part. If enabled.
		if ( is_singular() ) {
			if ($common->is_translation_enabled() ) {
				$translate_options = $this->show_translations_options($post_id, $common);
				if(isset($_GET['amazonai-language'])) {
					$selected_language = $_GET['amazonai-language'];
					if ( $source_language != $selected_language ) {
						$content = get_post_meta( $post_id, 'amazon_polly_transcript_' . $selected_language , true );
					}
				}
			}
		}

		// Put plugin content in the correct position.
		$selected_position = get_option( 'amazon_polly_position' );
		if ( strcmp( $selected_position, 'Do not show' ) === 0 ) {
			$content = $content;
		} elseif ( strcmp( $selected_position, 'After post' ) === 0 ) {
			$content = $content . $translate_options . $polly_content;
		} else {
			$content = $translate_options . $polly_content . $content;
		}

		return $content;
	}