When uploading an image file with dots in the filename we were splitting the string on dots and getting the last of the split items as the extension-less filename. However this did not work with filenames that have dots. We now just remove the extension using substr.
* instead of using encodeURIComponent in imageNameFromFileName,
we just replace the bad characters that we wanted to get rid
of in the first place where we introduced encodeURIComponent.
as per review
Meta: https://meta.discourse.org/t/image-name-has-20-in-file-name/134136
We were ending up with [file%20name](url) in the markdown preview, which looked weird and
affected the alt text. this is because we were calling encodeURIComponent, which has been left in place because this is a valid thing to do for some cases. (e.g. f674b9e)
This PR introduces a new secure media setting. When enabled, it prevent unathorized access to media uploads (files of type image, video and audio). When the `login_required` setting is enabled, then all media uploads will be protected from unauthorized (anonymous) access. When `login_required`is disabled, only media in private messages will be protected from unauthorized access.
A few notes:
- the `prevent_anons_from_downloading_files` setting no longer applies to audio and video uploads
- the `secure_media` setting can only be enabled if S3 uploads are already enabled and configured
- upload records have a new column, `secure`, which is a boolean `true/false` of the upload's secure status
- when creating a public post with an upload that has already been uploaded and is marked as secure, the post creator will raise an error
- when enabling or disabling the setting on a site with existing uploads, the rake task `uploads:ensure_correct_acl` should be used to update all uploads' secure status and their ACL on S3
