This helper class keeps the referenced ids to be dumped into the
inforef.xml files. For now, it uses a in-memory storage structures but
in the future we may refactor it so that it can use some persistent
storage (like converter's stashes).
We want to set migrated content file in the File module as a main file.
Main files are files with sortorder set to 1. Therefore the file manager
must provide a way to set the sortorder property of the new file record.
The second change allowing filepaths not ending with slash is a helper
as we can easily use dirname() as a value (see the usage in the next
commits). Not providing the dirname() was a bug as the reference to a
file in the HTML text did not respect the migrated file path.
These static caches were bad idea of mine. Multiple conversion jobs
executed from a single PHP script share such variables, of course, which
is wrong. This patch removes one static cache completely and
reimplements the other two static caches as normal member variables.
Grouped elements contain arrays with the sub-paths. This patch makes
sure that the sub-paths are pre-cooked recursively. However because the
recipes do not distinguish the full path to the element, only the
implicit recipe (making the tags lowecase) is applied. To avoid
potential data loss (for example dropfields recipe would delete all
fields from the whole grouped tree, not only the direct descendants of
the path where the recipe is declared), explicit recipes are forbidden
for grouped elements. The developer has to convert the $data manually as
needed.
In case the source $rootpath passed to the migrate_directory() does not
exist, an empty array is returned by the method. Note that if the
directory exists and is empty, the directory itself is converter so
there would be a new record created. However, the restore process
ignores these records anyway, as the directory records are created
automatically by certain file api methods.
The new file manager class is introduced. Once its public properties are
set, one can use it to migrate either a single file or a whole
directory. The course_files conversion reworked so that it uses the new
manager now. The files.xml written at the very end of the conversion,
giving all handlers a chance to migrate the files they need.
For system and course levels, we do not need itemid as we work with
single system context and single course context only. Thanks to this, we
can generate contextid for the restored course even we do not know its
original id yet.
It was realized that it is pretty common to register a convert_path just
to be able to attach on-start or on-end listeners to it, without actual
processing data. So now, the handler must provide at least one of these
three methods and the process_xxx() does not need to be there if it is
not needed.
Added write_xml() helper that writes the given tree-ish structure into
the current xml writer. Improved get_contextid() so that it can use
indices for searching data. Added set_stash() and get_stash() helper
methods.
This patch mainly adds support for dispatching path-start and path-end events,
defines API to access backup_ids_temp table. Some ideas emailed by Mark
after his first review of the code are incorporated already.
These are David's changes of Mark's code that replace the
plan/tasks/steps infrastructure with a bit simpler one. The changes will
be described in the next commit that will actually finish the
conversion.
TODO: refactor backup/converter/moodle1/stepslib.php into conversion
handlers.
Petr Skoda