Actually implement the billing stuff

[blonsky95]

Following these steps
https://developer.android.com/google/play/billing/integrate#kotlin

[blonsky95]

interesting/helpful coroutine stuff about when to use withContext/await/async https://medium.com/@vcanato/withcontext-async-or-launch-inside-coroutine-kotlin-17c332854a08

[blonsky95]

This project also useful - example of implementing everything with billing https://github.com/android/play-billing-samples/blob/master/ClassyTaxiAppKotlin/app/src/main/java/com/example/subscriptions/billing/BillingClientLifecycle.kt

[blonsky95]

Test if billing client lifecycle works fine

[blonsky95]

most things working now

do some clean up

• change trials to 1 - DONE
• encapsulate dialog windows logic for trial - DONE
• display a loading icon with a cancel button when loading purchases - probably do a view model - place here the isLoading liveData, - change to true when active - which triggers the loading window with cancel - If gets cancelled - change to false - triggers dialog hide - when data retrieved - change to false which clears the loading window - DONE

[blonsky95]

Just realised something big with interfaces

If you want something that inherits an interface to use all the methods, then the functions in the interface would be: fun doSomething1() if you inherit the interface, you have to provide a method for this

but if you do fun doSomething1() {} When you inherit the interface you dont have to provide a method, (the body exists even if empty so it doesnt need to be overriden)

lol https://kotlinlang.org/docs/reference/interfaces.html

[blonsky95]

• did a bit of docummenting
• did strings for spanish english - test if the segment concatenation works fine in both langs
• next continue with the next purchasing step - actually making the purchase

[blonsky95]

need to follow this before I test purchasing

https://developer.android.com/google/play/billing/test#testing-purchases

see if what i have in code now can be tested with that - that when you press subscribe and it takes you to that skudetails i dont get the error of product not found

once that is working continue https://developer.android.com/google/play/billing/integrate#pending

bear in midn that i am acknowledging the purchase on main thread, see if its problem to block it or if it should be done elsewhere (coroutines)

[blonsky95]

THINGS TO DO:

1. If you uninstall and install or change device but same google account - user gets prompted - so option 1 - open billing client and do check at the start or option 2 - in the dialog for buying trigger another dialog saying the subscription is now active on this device - or just change button to ACTIVE - needs a how to cancel thing - non refundable -

2. change the subscribe button to something else when user finished subscribing or when they go to this screen if they already subscribed - use the live data in the query purchases function as well as the on purchase update

MOOOOOOOOOOOOOOOOOOOOOOOOD

• up is done, but need a couple things:
  1. test without internet - DOOOOONE
  2. for the device change thing - activates as soon as user opens dialog - consider initialising billing client at start? so it stores on preferences asap? or as it is - DOOOOOOONE
  3. when user cancels subscription - how to remove them - investigate - DOOOOONE
  4. investigate more scenarios as recommended in developer guides

[blonsky95]

So right now it works well, still need to address points 1. and 4. from previous comment but

• cancelling works fine now - however need to see what happens when no internet - if you cancel but never use internet in the app do you ever get caught? maybe put an obligatory check for next two weeks when you know you had a purchase to check the state until first payment?

[blonsky95]

test the following

start free trial with internet (3 min) - then cancel before renewing - then take internet - then use app

[blonsky95]

Ok good news - it seems like play store already does it behind the scenes and loads a cache version or something so even without internet, the billing client does receive the updated list of purchases in which the cancelled subscription doesn't show up, even when opening the app without internet, so it does it bts.

If I open the app without internet, with a valid subscription, it does work, and it appears in the list of purchases!!!

[blonsky95]

So now go to dev guides and test the other scenarios

then clean up strings and text

[blonsky95]

TESTS: https://developer.android.com/google/play/billing/test

see if after 6 months (6*30 mins) when it stopes renewing - if subscription status is removed - check at 5.23

Monthly subscription with grace period; user recovers - mid subscription change the test license to decline during a renewal,

test account holds - so - after a payment is declined it enters account hold where you dont have access but user should know the reason they dont have access if because payment didnt go through, so dont show normal subscribe dialog --- detect if account is on hold

[blonsky95]

• Do all the text to make it have sense - in the dialog - and in the guide - add a section after controls about trial and premium

• then think of the most basic scenarios and run them through

[blonsky95]

STRINGS DONE - now think basic scenarios - release it and test it or something - see whats next