Misleading notification when changing file type via JekyllAdmin

Describe in one or two sentences why you’re opening this issue:

Renaming a .txt file as .md file throws a misleading flash notification

Tell us a bit about yourself

• Version of JekyllAdmin I’m using <hint: use bundle show to check>: 0.1.0
• Version of Jekyll I’m using <hint: use bundle show to check>: 3.2.1
• Operating System <e.g. OS X, Windows>: Windows 7
• Browser <e.g, Safari, Chrome>: Chrome

Steps to reproduce

Navigate to http://localhost:3000/admin/page/new create demo.txt by entering that in the breadcrumb rename demo.txt to demo.md in the breadcrumb

Expected

Expected demo.txt to be renamed to demo.md silently or with a success! notification

Actual

demo.txt is successfully renamed to demo.md but with a error flash notification (couldn’t update page…)

Other details

• This could be a false alarm as the plugin is infact rightfully stating that demo.txt couldn’t be updated as its no longer available.
• Its nevertheless an alarm that may cause confusion for a short while. Possible solution: Introduce a flash notification to handle renaming. This will return a message echoing the old filename with extn and the new filename with extn

[mertkahyaoglu]

Closed via #307

[ashmaroli]

We should either not allow creating pages with .txt extension

I think it would be better to not allow change of file extension / type via the Admin interface.

–

or not add any front matter if the extension is not markdown

don’t think that’s a good idea. Even *.html with Front Matter is a valid JekyllPage object.