designing a Swiggy app!

designSwiggyApp.txt

Designing Swiggy-app!

requirements
Kotlin
MVVM - MVI etc
android arch components
Dagger-Hilt, MockK
retrofit2
kotlin coroutines

multi geographic & accessibility
flavors

jP strings - based on user device  language


security



design
ask location permission
it'll get your curreent location

dashboard
offers, restaurants, coupens, if order is confirmed you'll track delivery boy live location

search
restaurant, food
choose -> make menu -> order(cart+payment)

settings / account
user minimal, logout etc.


MVVM
Coroutines
ROOM DB, LiveData

getting User location - scenario
it'll ask the permission - location - deny - we'll educate - allow
track the location
make an api to backend details to shown in dashboard - activity <- viewModel <- repository <- success - 
populate views - recyclerview


order tracking
delivery boy -> he'll share location with Swiggy backend -> google location apis -> periodic tracking
when open
data bar -> delivery boy's details -> google map
websocket -> swiggy backend
make websocket connection


SocketUtilClass -> make, disconnect, handle msgs -> 

DashBoardViewClass
DashBoardViewModel
DashBoardRepository -> 
msg from SocketUtilClass -> orderLiveData(Mutable) -> _orderLiveData(Immutable) DashBoardViewModel -> DashBoardView -> I'll do UI changes

only in foreground
in bg -> disconnect websocket
kill app -> disconnect websocket


interface APIs{
	suspend fun getMenu() : List<Items>
}

DashBoardRepository()
suspend getMenu(){
	retrofitServce.getMenu()
}

DashBoardViewModel
repository
fun getMenu(){
	viewmodelscope.launch{
		repo.getmenu()
	}
}


Dagger-Hilt -> FakeRepository
DashBoardViewModelTest{

	@Test
	fun getMenuTest(){
		//	given
		fake.getMenu -> itemsList(FakeList) 

		//	when

	}
}




polling -> https
fcm -> 


main() {
(1,2,3,4).forEach{
		it.mapIs{

		}
	}
}


emitted.mapIs(callBack: (Boolean) -> Unit){
	val isAvailable = this.map{
		it * 2
	}.map{
		val value = it + 5
		value
	}.map{
		it % 2 == 0
	}.toBoolean()

	callback.invoke(isAvailable)
}