Economic Calendar Entry and Exit Condition

Need a entry and exit condition for an existing EA based on the economic calendar (Forex Factory, DailyFX, MyFxBook, etc.). 

 Need the below variables to be included in the EA.

 Enable Entry: True  / False

 Enable Exit: True / False

Entry Time Before:  X minutes

Entry Time After: X minutes

High Impact: check box

Medium Impact: check box

Low Impact: check box