ApplicationHelper#format_price and Budget#formatted_amount has the same
objective and code, but the Budget#formatted_amount method also uses the
currency of the Budget to correctly give currencies format.
By replacing usage of format_price with formatted_amount we can remove
format_price and have a single location for currency format logic.
Why:
The logic to construct the link to a heading (if it exists) is in three
different places, this is a clear candidate for a helper method.
How:
Just checking at the helper method if `assigned_heading` and `budget`
has values and composing the link if so.
Valuators should not be able to edit a finished valuation (only admins
should).
The valuation form is only shown to the valuator if he has that ability
(we've previously modified app/models/abilities/valuator.rb to be able
to rely on `valuate` over an investment to check that)
If the valuator can't see the form, we present him just the data in
plain text.
Why:
Both Newsletters and Email Downloads need the same logic: To extract the
emails from all the users in the segment that have newsletter flag
active, removing all empty email values.
How:
1- UserSegments#user_segment_emails holds that repeated logic and is used
on both Newsletter & EmailDownload.
2- Rename Newsletter#list_of_recipients to list_of_recipient_emails as
it is more descriptive. There is no need to pass entire Users around,
only the emails are needed at Mailer#newsletter method.
3- Cleanup Newsletter#list_of_recipient_emails model spec scenario
Why:
Newsletters without a valid user segment can't be sent since there is no
recipient user email list.
How:
* Hiding the send button at the form
* Preventing an invalid newsletter from being delivered at the controller
Why:
Newsletter attribute `segment_recipient` is an integer to be used as
enum. There's no advantage to store a number instead of an string if the
ammount of elements in the table is not going to be huge, or we can take
advantage of using an enum.
Also maintaining both Newsletters enum paired with UserSegments::SEGMENTS
would be a maintenance burden.
How:
* Migration to change segment_recipient column from integer to string
* Removing enumeration from Newsletter model class
* Using UserSegments::SEGMENTS instead of Newsletter.segment_recipients
or integer values
