You should take array of date intervals:
- 01.01-10.01 2021 allowed
- 15.05-30.05 2021 allowed
- 10.05-17.05 2021 forbid
- 16.05 - 05.06 2021 allowed high priority
Inveterals can have priority
Some of the invervals allow to work with dates, some of them not. Dates can be overlayed if they are from different types of invervals. In the output we can see the list of allowed dates
DI should be used
- PHP 8
- composer
- SOLID