* Add previous, current and next forms to form handler
* Add current, previous and next sales forms to form handler
* Implement current_lettings_form, current_sales_form and store year and form type in form
* refactor lettings_forms
* Use current, previous and next forms in lettings log model
* Use current, previous and next forms in sales log model
* use current, previous and next forms in csv service
* Remove "startyear_endyear" forms from form handler
* Remove name from form initializer and add an optional start year
* refactor get_form
* update csv test, fix form initialize
* rebase fix
* Refactor form_name_from_start_year method out
* remove unused variable
* fix typo, add date tests
* rebase, fix tests
* add comment to before test block
* Change the FormHandler back to only contain the form objects
* extract name
* Add abstract log class and sales log class
Created a parent log class for sales log and lettings log. Any bits common
to both sales and lettings can live in the parent class. As the sales log
functionality is built up any commonalities with lettings log can be extracted
into the parent log class. The sales log model is set up without a json form
and instead the form is defined in code - like the setup section of the lettings
log.
* update sales logs controller
* update lettings controller specs
* update filter method name
* update organisations controller
* use lettings method
* Add deleted tests back
* lint
Co-authored-by: Kat <katrina@madetech.com>
Co-authored-by: Kat <kosiak.katrina@gmail.com>
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