Tracking Object Additions, Deletions, and Moves
===============================================

Unique ID utilities track object add moves.  Let's look at an
example. First, we'll create a unique Id utility:

  >>> print http(r"""
  ... POST /++etc++site/default/@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Referer: http://localhost:8081/++etc++site/default/@@contents.html
  ...
  ... type_name=BrowserAdd__zope.app.intid.IntIds&new_value=""")
  HTTP/1.1 303 See Other
  ...
  Location: http://localhost/++etc++site/default/IntIds/@@registration.html
  ...

  >>> print http(r"""
  ... POST /++etc++site/default/IntIds/addRegistration.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Referer: http://localhost:8081/++etc++site/default/IntIds/
  ... Content-Type: multipart/form-data; boundary=----------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... 
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... Content-Disposition: form-data; name="field.name"
  ... 
  ... IntIds
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... Content-Disposition: form-data; name="field.provided"
  ... 
  ... zope.app.intid.interfaces.IIntIds
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... Content-Disposition: form-data; name="field.provided-empty-marker"
  ... 
  ... 1
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... Content-Disposition: form-data; name="field.comment"
  ... 
  ... 
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ
  ... Content-Disposition: form-data; name="field.actions.register"
  ... 
  ... Register
  ... ------------CedQTrEQIEPbgfYhvcITAhQi2aJdgu3tYfJ0WYQmkpLQTt6OTOpd5GJ--
  ... """)
  HTTP/1.1 303 See Other
  ...

Now, we'll add a few folders:

  >>> print http(r"""
  ... POST /@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 64
  ... Content-Type: application/x-www-form-urlencoded
  ... 
  ... type_name=BrowserAdd__zope.app.folder.folder.Folder&new_value=f1""")
  HTTP/1.1 303 See Other
  ...

  >>> print http(r"""
  ... POST /f1/@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 64
  ... Content-Type: application/x-www-form-urlencoded
  ... 
  ... type_name=BrowserAdd__zope.app.folder.folder.Folder&new_value=f1""")
  HTTP/1.1 303 See Other
  ...

  >>> print http(r"""
  ... POST /f1/@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 64
  ... Content-Type: application/x-www-form-urlencoded
  ... 
  ... type_name=BrowserAdd__zope.app.folder.folder.Folder&new_value=f2""")
  HTTP/1.1 303 See Other
  ...

  >>> print http(r"""
  ... POST /f1/f1/@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 64
  ... Content-Type: application/x-www-form-urlencoded
  ... 
  ... type_name=BrowserAdd__zope.app.folder.folder.Folder&new_value=f1""")
  HTTP/1.1 303 See Other
  ...

Now, if we look at the index page for the unique id utility, we'll see
the objects we added:

  >>> print http(r"""
  ... GET /++etc++site/default/IntIds/@@index.html?testing=1 HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Referer: http://localhost:8081/++etc++site/default/@@contents.html
  ... """)
  HTTP/1.1 200 Ok
  ...4 objects...
  .../f1...
  .../f1/f1...
  .../f1/f2...
  .../f1/f1/f1...

If we move the top object:

  >>> print http(r"""
  ... POST /@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 40
  ... Content-Type: application/x-www-form-urlencoded
  ... Referer: http://localhost:8081/@@contents.html
  ... 
  ... new_value%3Alist=f2&rename_ids%3Alist=f1""")
  HTTP/1.1 303 See Other
  ...

We'll see that reflected in the utility:

  >>> print http(r"""
  ... GET /++etc++site/default/IntIds/@@index.html?testing=1 HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Referer: http://localhost:8081/++etc++site/default/@@contents.html
  ... """)
  HTTP/1.1 200 Ok
  ...4 objects...
  .../f2...
  .../f2/f1...
  .../f2/f2...
  .../f2/f1/f1...

And if we delete the top object:

  >>> print http(r"""
  ... POST /@@contents.html HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Content-Length: 44
  ... Content-Type: application/x-www-form-urlencoded
  ... Referer: http://localhost:8081/@@contents.html
  ... 
  ... ids%3Alist=f2&container_delete_button=Delete""")
  HTTP/1.1 303 See Other
  ...

all of the objects will go away:

  >>> print http(r"""
  ... GET /++etc++site/default/IntIds/@@index.html?testing=1 HTTP/1.1
  ... Authorization: Basic mgr:mgrpw
  ... Referer: http://localhost:8081/++etc++site/default/@@contents.html
  ... """)
  HTTP/1.1 200 Ok
  ...0 objects...