====== ThenThat ======

===== Subscribe to atomic changes in excel spreadsheet =====

Potential applications:

  * organizing event with attendance confirmations (wedding)
  * appointments cancellation or timing change in Health Clinic
  * update of debt in house commitee
  * important notification that members must confirm receival
  * results of exam
  * work shifts changes notifications with confirmation

==== Health Clinic appointment Flow ====

  - Recognition: mandatory steps for Clinic to subscribe to user
      - Client performs lookup for the Clinic "NewClientRegistration", fills up data
      - Clinic is subscribed to objects of type "NewClientRegistration", human verification is likely necessary
      - Clinic creates targeted "Welcome" message, with links to various services
  - Slots creation
      - Publisher (Secretary in the Health Clinic) creates slots document:
        - Prepare excel document with empty slots. The slots must have field "State" with possible values "Taken", "Free" or "Canceled". A daily template might be used
        - The document is uploaded using web interface.
        - Publisher receives WebDAV link, so he can edit the file
      - Publisher subscribes for targeted objects of "WantToReserveSlot"
      - Client discovers "registration" page and creates targeted object "WantToReserveSlot"
      - Publisher confirms user's identity and fills up rows in the excel file - probably using WebDAV, to lock the document properly
      - Publisher creates targeted object "SlotReservedSuccess" for user with link to the excel file.
      - User chooses whether to subscribe to changes in the file. He might filter changes to individual rows, for example using the row data as "Anchor" and field "State" as Needle.
  - Human notifications to the document
      - The document is then inotify monitored. On change "DocumentChanged" is created.
      - User receives the "DocumentChanged". If Anchor/Needle is specified, additional check is done.
      - TBD: InteractiveNotification with Answer Options