Yii2 module independency

Question

We're developing an Yii2 php appliction, which can be seen as a AirBNB clone for sake of simplicity. I'm trying to devide the application into modules, but keep getting ugly dependencies no matter how I twist or try. Couple of examples:

• There is a booking and an item module, when displaying an item, the booking module is also to be used to disable dates when an item is already booked.
• On the confirm booking page, a credit card form is implemented which belongs to the payment module, which couples the modules really tightly.
• The homepage should display items, which depend on the item module for generating the right image url's etc.

How can we keep this kind of things decoupled?

Answer 1

For anybody looking at the same problem, I currently solved it by keeping every strictly decoupled. Modules can either make a call to a custom made WidgetRequester, which sees is a requested widget exists in another module, and returns it if it does, which solves the problem of pages with multiple module dependencies (an item page with a booking form i.e.).

Modules can also trigger normal Yii events, which can be picked up by other modules in their Bootstrap file, and process the events to their own liking.