New rule: oversized images (#276)

New rule: oversized images
2019-01-13 17:18:03 +05:30
parent fa216dddd5
commit 8ffab2ae70
10 changed files with 200 additions and 6 deletions
@@ -0,0 +1,51 @@
+var debug               = require('debug')('ylt:imageDimensions');
+var Q                   = require('q');
+var sizeOf              = require('image-size');
+
+var ImageDimensions = function() {
+
+    function getDimensions(entry) {
+        var deferred = Q.defer();
+
+        if (!entry.weightCheck || !entry.weightCheck.bodyBuffer) {
+            // No valid file available
+            deferred.resolve(entry);
+            return deferred.promise;
+        }
+
+        var fileSize = entry.weightCheck.uncompressedSize;
+
+        if (isJPEG(entry) || isPNG(entry)) {
+            try {
+                var dimensions = sizeOf(entry.weightCheck.bodyBuffer);
+                debug('Image dimensions of %s: %sx%s', entry.url, dimensions.width, dimensions.height);
+
+                entry.imageDimensions = {
+                    width: dimensions.width,
+                    height: dimensions.height
+                };
+            } catch(err) {
+                debug('Error while checking image dimensions:');
+                debug(err);
+            }
+        }
+        
+        deferred.resolve(entry);
+
+        return deferred.promise;
+    }
+
+    function isJPEG(entry) {
+        return entry.isImage && entry.contentType === 'image/jpeg';
+    }
+
+    function isPNG(entry) {
+        return entry.isImage && entry.contentType === 'image/png';
+    }
+
+    return {
+        getDimensions: getDimensions
+    };
+};
+
+module.exports = new ImageDimensions();