Image filters

inc/image/namespace.php

@@ -111,7 +111,18 @@ function is_valid_image( $file, $filename, $is_stream = false ) {
 	$format = explode( '.', $filename );
 	$format = strtolower( end( $format ) ); // Extension
 	if ( ! ( 'jpg' === $format || 'jpeg' === $format || 'gif' === $format || 'png' === $format ) ) {
-		return false;
+
+		/**
+		 * @since 5.5.0
+		 *
+		 * Filters if a image has a valid extension
+		 *
+		 * @param boolean $valid if is valid
+		 * @param string $extension the extension of the file
+		 */
+		if ( ! apply_filters( 'pb_is_valid_image_extension', false, $format ) ) {
+			return false;
+		}
 	}
 
 	if ( $is_stream ) {
@@ -125,7 +136,16 @@ function is_valid_image( $file, $filename, $is_stream = false ) {
 	if ( IMAGETYPE_JPEG === $type || IMAGETYPE_GIF === $type || IMAGETYPE_PNG === $type ) {
 		return true;
 	} else {
-		return false;
+		/**
+		 * @since 5.5.0
+		 *
+		 * Filters if a image is a valid image type
+		 *
+		 * @param boolean $valid if is valid
+		 * @param string $type the type of the image
+		 * @param file $file the file
+		 */
+		return apply_filters( 'pb_is_valid_image_type', false, $type, $file );
 	}
 }
 

inc/modules/export/epub/class-epub201.php

@@ -2004,19 +2004,35 @@ protected function fetchAndSaveUniqueImage( $url, $fullpath ) {
 		// Basename without query string
 		$filename = explode( '?', basename( $url ) );
 
-		// isolate latex image service from WP, add file extension
-		$host = wp_parse_url( $url, PHP_URL_HOST );
-		if ( ( str_ends_with( $host, 'wordpress.com' ) || str_ends_with( $host, 'wp.com' ) ) && 'latex.php' === $filename[0] ) {
-			$filename = md5( array_pop( $filename ) );
-			// content-type = 'image/png'
-			$type = explode( '/', $response['headers']['content-type'] );
-			$type = array_pop( $type );
-			$filename = $filename . '.' . $type;
+		/**
+		 * @since 5.5.0
+		 *
+		 * Filters the filename of a unique image
+		 *
+		 * @param string $filename the filename
+		 * @param array $ori_filename the original filename
+		 * @param object $response the response
+		 * @param string $url the url
+		 */
+		$unique_filename = apply_filters( 'pb_epub201_fetchandsaveuniqueimage_filename', '', $filename, $response, $url );
+
+		if ( '' !== $unique_filename ) {
+			$filename = $unique_filename;
 		} else {
-			$filename = array_shift( $filename );
-			$filename = explode( '#', $filename )[0]; // Remove trailing anchors
-			$filename = sanitize_file_name( urldecode( $filename ) );
-			$filename = Sanitize\force_ascii( $filename );
+			// isolate latex image service from WP, add file extension
+			$host = wp_parse_url( $url, PHP_URL_HOST );
+			if ( ( str_ends_with( $host, 'wordpress.com' ) || str_ends_with( $host, 'wp.com' ) ) && 'latex.php' === $filename[0] ) {
+				$filename = md5( array_pop( $filename ) );
+				// content-type = 'image/png'
+				$type = explode( '/', $response['headers']['content-type'] );
+				$type = array_pop( $type );
+				$filename = $filename . '.' . $type;
+			} else {
+				$filename = array_shift( $filename );
+				$filename = explode( '#', $filename )[0]; // Remove trailing anchors
+				$filename = sanitize_file_name( urldecode( $filename ) );
+				$filename = Sanitize\force_ascii( $filename );
+			}
 		}
 
 		// A book with a lot of images can trigger "Fatal Error Too many open files" because tmpfiles are not closed until PHP exits
@@ -2034,12 +2050,22 @@ protected function fetchAndSaveUniqueImage( $url, $fullpath ) {
 		}
 
 		if ( $this->compressImages ) {
-			$format = explode( '.', $filename );
-			$format = strtolower( end( $format ) ); // Extension
-			try {
-				\Pressbooks\Image\resize_down( $format, $tmp_file );
-			} catch ( \Exception $e ) {
-				return '';
+			/**
+			 * @since 5.5.0
+			 *
+			 * Filters if a image should be compressed
+			 *
+			 * @param boolean $compress should it be compressed
+			 * @param file $tmp_file the temp file
+			 */
+			if ( apply_filters( 'pb_epub201_fetchandsaveuniqueimage_compress', true, $tmp_file ) ) {
+				$format = explode( '.', $filename );
+				$format = strtolower( end( $format ) ); // Extension
+				try {
+					\Pressbooks\Image\resize_down( $format, $tmp_file );
+				} catch ( \Exception $e ) {
+					return '';
+				}
 			}
 		}