Adds a helper since there are only a few different parameters for
all BillingSession child clases, `build_support_url`.
Also, renames `get_support_url` to more explicitly note that it
is for realms: `get_realm_support_url`.
Moves the section in support views for any current plan details
to a new template: `templates/analytics/current_plan_details.html`.
Also, updates the PlanData dataclass to have a boolean that checks
if the current plan tier is the self-hosted legacy plan.
Creates a process_support_view_request method for BillingSession
to process the various support requests that relate to the billing
system.
Moves approve_realm_sponsorship, update_realm_sponsorship_status,
and attach_discount_to_realm to this new BillingSession method.
Adds a new abstract property to BillingSession to have a string
value, billing_entity_display_name, to use for support messages
sent when these requests are processed.
The "send_invoice" and "charge_automatically" strings used by stripe
for the `collection_method` are referred to both as the "billing
method" and "billing modality" in the billing code.
Because we send this as data to stripe as either `collection_method`
or `billing_modality`, renames any references that are any form of
"billing method".
Moves and generalizes `switch_realm_from_standard_to_plus_plan`
in stripe.py to be a more general function for changing a
CustomerPlan to a new and valid tier, `do_change_plan_to_new_tier`.
Adds a helper function with the previous function name to be used
for the support view and management command for changing a realm
from the Standard plan tier to the Plus plan tier.
Moves `update_billing_method_of_current_plan` to the BillingSession
abstract class.
Adds a helper function for support views for the realm case:
`update_realm_billing_method`.
Moves `update_sponsorship_status` to BillingSession abstract class
as `update_customer_sponsorship_status`.
Updates the support views to have a helper for updating this on a
realm: `update_realm_sponsorship_status`.
Makes `approve_sponshorship` an abstract method in BillingSession
abstract base class and moves the implementation for realms to the
RealmBillingSession child class.
Adds `approve_realm_sponsorship` helper function that's used in
the support view and initiates the billing session.
This moves the logic for `attach_realm_discount`, which is used in
the support view, to be in the BillingSession class.
Updates the function name to be `attach_discount_to_customer` so
that the context is generalized vs realm specific.
Updates RealmBillingSession implementation to account for actions
that are initiated by a support admin user.
Also moves the helper function `get_discount_for_realm` that is
only used in support views to `corporate/lib/support.py`.
Lauryn Menard
Tim Abbott
Eeshan Garg