* create method to test whether we are currently in the crossover period and associated tests
* update copy, use method for testing whether we are in the crossover period, remove focus from test file
* reuse existing method to determine whether we are in a collection period
* use the existing method and update validations
* fix test broken by changes
* update location in same way as scheme
* create method on FormHandler that finds the start date of the earliest collection period
* ensure that default deactivation and reactivation dates also reflect the changes
* create tests for the new validations
* lint correction
* minor copy change
* minor logic change
* amend naming error after rebase conflict
remove test that is no longer correct after change on another branch to functionality
update a test after a copy change
* feat: add scheme reactivation behaviour
* test: add tests
* refactor: linting
* fix: find deactivation periods by scheme/location ids rather than just the first
* feat: add activating_soon status to location (not to schemes as they have no startdate field)
* feat: fix logic and add tests fo activating soon
* fix: check for startdate presence
* route deactivated scheme to reactivation page
* Render correct reactivate question content
* refactor into a helper
* display successful reactivation banner for default date
* Save reactivation date
* Add reactivation errors
* lint and fix url in tests
* make toggle translations generic
* Add reactivation status
* Reuse date validation messages
* Show deactivate this location when location is reactivating soon
* Display correct confirmation banner
* Add validation for reactivation date before deactivation date
* Improve availability label
* Use current collection start date if created at is later than that
* Update paths
* Fix controller and don't display the previous day if location availability start afterwards
* refactor availability label
* Filter out active periods
* lint
* Refactor active_period method into the model
* Allow deactivations and reactivations from available from date instead of start of the collection date
* Prevent deactivations during deactivated periods
* lint
* typo
* Remove active periods that last 1 day (because they get deactivated on the same day)
* Move the active_periods into helper
* extract remove_overlapping_and_empty_periods into a separate method
* Remove nested deactivation periods
* Make deactivate/reactvate location form use location_deactivation_period model
* refactor toggle date methods
* extract shared condition
* update validations
* refactor validations
* Update schemes deactivation form to use dectivation model
* Refactor
* lint
* remove redundant location_id and update scheme controller
* update active_periods
* Remove deactivation date from schemes and add scheme deactivation periods table
* Update affected logs when a scheme gets deactivated
* Update status method
* Display availability timeline
* Update flash notice message