Issue #3363745: Deprecate file_validate_image_resolution() and replace with a service

core/modules/file/src/FileUsage/ImageResizer.php

+<?php
+
+namespace Drupal\file\FileUsage;
+
+use Drupal\file\FileInterface;
+
+class ImageResizer {
+
+ public function fileValidateImageResolution(FileInterface $file, $maximum_dimensions = 0, $minimum_dimensions = 0){
+    $errors = [];
+
+    // Check first that the file is an image.
+    $image_factory = \Drupal::service('image.factory');
+    $image = $image_factory->get($file->getFileUri());
+
+    if ($image->isValid()) {
+      $scaling = FALSE;
+      if ($maximum_dimensions) {
+        // Check that it is smaller than the given dimensions.
+        [$width, $height] = explode('x', $maximum_dimensions);
+        if ($image->getWidth() > $width || $image->getHeight() > $height) {
+          // Try to resize the image to fit the dimensions.
+          if ($image->scale($width, $height)) {
+            $scaling = TRUE;
+            $image->save();
+            if (!empty($width) && !empty($height)) {
+              $message = t(
+                'The image was resized to fit within the maximum allowed dimensions of %dimensions pixels. The new dimensions of the resized image are %new_widthx%new_height pixels.',
+                [
+                  '%dimensions' => $maximum_dimensions,
+                  '%new_width' => $image->getWidth(),
+                  '%new_height' => $image->getHeight(),
+                ]
+              );
+            } elseif (empty($width)) {
+              $message = t(
+                'The image was resized to fit within the maximum allowed height of %height pixels. The new dimensions of the resized image are %new_widthx%new_height pixels.',
+                [
+                  '%height' => $height,
+                  '%new_width' => $image->getWidth(),
+                  '%new_height' => $image->getHeight(),
+                ]
+              );
+            } elseif (empty($height)) {
+              $message = t(
+                'The image was resized to fit within the maximum allowed width of %width pixels. The new dimensions of the resized image are %new_widthx%new_height pixels.',
+                [
+                  '%width' => $width,
+                  '%new_width' => $image->getWidth(),
+                  '%new_height' => $image->getHeight(),
+                ]
+              );
+            }
+            \Drupal::messenger()->addStatus($message);
+          } else {
+            $errors[] = t('The image exceeds the maximum allowed dimensions and an attempt to resize it failed.');
+          }
+        }
+      }
+
+      if ($minimum_dimensions) {
+        // Check that it is larger than the given dimensions.
+        [$width, $height] = explode('x', $minimum_dimensions);
+        if ($image->getWidth() < $width || $image->getHeight() < $height) {
+          if ($scaling) {
+            $errors[] = t(
+              'The resized image is too small. The minimum dimensions are %dimensions pixels and after resizing, the image size will be %widthx%height pixels.',
+              [
+                '%dimensions' => $minimum_dimensions,
+                '%width' => $image->getWidth(),
+                '%height' => $image->getHeight(),
+              ]
+            );
+          } else {
+            $errors[] = t(
+              'The image is too small. The minimum dimensions are %dimensions pixels and the image size is %widthx%height pixels.',
+              [
+                '%dimensions' => $minimum_dimensions,
+                '%width' => $image->getWidth(),
+                '%height' => $image->getHeight(),
+              ]
+            );
+          }
+        }
+      }
+    }
+
+    return $errors;
+  }
+ }