Support for maximum allowed image size

Minor improvements:

• Used short array syntax.
• Added additional empty checks.

Updated patch that applies to latest code.

Would be nice to apply the checks using the client side JavaScript too.

And another minor fix to change the size error messages to say "than" instead of "then".

As per #4 this does not work.
Logic here, is that images have to scale down to maximum allowed image size at image field settings.
Just comes with an error saying that "The file nz6_3733.jpg with resolution 6048x4024 could not be uploaded. The file should be smaller than 1600x1600"

#4 details a mistake in the error message.

This patch is intended to prevent users from uploading images larger than the maximum allowed size.

Before this patch, images where uploaded directly, even if their size was larger then the maximum size.

@Nick Dewitte, oh yes, sorry about that. I just reviewed the patch code and i relize this was not what i expected.
What i was expected was an image dimensions resize message like this:
The image was resized to fit within the maximum allowed dimensions of 1600x1600 pixels. The new dimensions of the resized image are 1600x1065 pixel
Seems that this is a core issue https://www.drupal.org/project/drupal/issues/3008292.
I am not sure if this patch here could be merged, so we have the functionality i wish.
Thank you for this module and your work!

Patch looks good, but not adding the validation as it does check for type 'image' by using array key exists in the MediaType object so update the code to check the plugin id of the mediaType source.

I am applying a new patch that is using the core image resolution validation and is resizing the image if needed.

I am applying new patch to work with 3.0.0 version. Please review. It works fine for max image resolution, but does not show error message for minimum image resolution.

This is a nice UX issue. Assigning to myself to try to get this into the next release.

Fyi, for all the people who've added updated patches above, in the future, please include interdiffs so we know easily what has changed:

https://www.drupal.org/node/1488712

Here are crude raw diffs between the 4 patches.

Quick review of the last patch in #15. I haven't tested.

1. +++ b/src/Form/MediaBulkUploadForm.php
   @@ -482,6 +483,12 @@ protected function processFile(MediaBulkConfigInterface $mediaBulkConfig, FileIn
   +       throw new \Exception('File entity could not be created.');
   

   Nitpick: missing space before throw

2. +++ b/src/Form/MediaBulkUploadForm.php
   @@ -536,6 +543,31 @@ protected function validateFileSize(MediaTypeInterface $mediaType, FileInterface
   +   *   Media Type.
   

   Nitpick: The media type.

3. +++ b/src/Form/MediaBulkUploadForm.php
   @@ -536,6 +543,31 @@ protected function validateFileSize(MediaTypeInterface $mediaType, FileInterface
   +   * @param array $file
   +   *   File.
   

   Fix param type: array => File

   Nitpick: The file.

I'm going to fix this one and test it.

I tested and did some tweaks to the code. I found that it is fine for dealing with the max resolution but not the min which was noted above in #15. But this may be due to:

#2922667: Image fields minimum dimension restrictions don't apply equally in D7 and D8

so I'm going to let this slide for now. It does resize the image when it's too big which is nice.

Thanks, everyone!