This is an add-on that lets you close your store to orders being placed. It contains 2 modules.
The first is a simple header message which can be used to let your customer know you are closed.
The second is a button control header tag that hides buy or add to cart buttons on index and replaces the buy button on product info page with a closed button. It is designed for stock install so if you have any custom buttons then you will need to deal with those separately.
Again totally stand alone with no code change. Simply copy all files into relevant sections and install.
The messages can be set in admin by editing language files.
Once installed all you need to do is turn on the 2 modules to close the store to new orders. No other module needs to be changed as customer can not add anything to basket. Your store should be full functional other than this and web links , seo should be unaffected as all products and pages are still active and available.
Has been tested on Phoenix 184.108.40.206 only.