Description

The next command should be able to retrieve a list of menus from the database. A parameter will provide the number of days to query.

So. next 5 will get everything between today and today plus 5. A max number of 7 days can be queried. More days will spam the chat.

Examples

next 1
On *01.01.2017* the meals are:
1. Foo
2. Foobar

next 2
On *01.01.2017* the meals are:
1. Foo
2. Foobar

On *02.01.2017* the meals are:
1. Foobar
2. Foo

When it is not known what is served on the queried day, it will be state. So no day will be skipped.

We should add a new command that allow us to query the current week or month. The result will be a list of all menus in that time frame. Maybe best to restrict this to private channels only because such a list could be pretty long.

Currently every command handles FILE operations on its own. Best to use some shared mechanism for this.