refractor fields and listing model

[lenad90]

Documents changed: Model: Listing.java and ListingFields.java

• Removed documents in listing and created a new model class for listing fields to identify the fields in the message embed

Controller: ListingController.java

• Removed any JDA dependencies in the controller and added new querying logic for getListingByKeyword() and getListingsByUser(). Changed setListing() to addListing() for a better naming convention. Added createListing() and createListingFields() using builders to allow the creation of the models in order to pass it through addListing().

ViewMyListingCommand.java

• Refactored the code have new methods that identify the functions within the event code. This is will help with testing since mock variables can be made to test these functions? (Correct me if I'm wrong)

Note: **I decided to push without executing the bot first because createMyListing.java needs to be refactored as well

[tsanevp]

"ViewMyListingCommand.java

Refactored the code have new methods that identify the functions within the event code. This is will help with testing since mock variables can be made to test these functions? (Correct me if I'm wrong)"

I don't think we can test anything in your ViewMyListingCommand.java. It all relies on discord, and we are supposed to "assume" discord will do what we expect. All methods take discord variables as parameters.

Your controller code is now testable, however. You can do that with the InMemory repository.