HFP-3065 Allow to delete library if circular dependency #101
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A long time ago in a galaxy far far away, the
H5PLibraryList
class was created to allow H5P library management - including deletion of libraries. Libraries cannot be deleted, of course, if some content or library still depends on it.Unfortunately, it is possible that a content library is used for the view and the editor alike, e.g. Course Presentation. H5P.CoursePresentation has an "editor" dependency to H5PEditor.CoursePresentation, and H5PEditor.CoursePresentation has a "preloaded" dependency to H5P.CoursePresentation. This direct circular dependency prevents both libraries from being deleted (without manually modifying the relevant entries in the
h5p_libraries_libraries
database table.When merged in, the
H5PLibraryList
class will now check the library data for ahasCircularEditorDepencendy
flag that needs to be set in the integration. If set and the respective editor library is the only library that requires the library at stake, then it is safe to delete it and the delete button will not be disabled.Setting the
hasCircularEditorDepencendy
flag if appropriate and allowing the library to be deleted needs implementation in the integrations. There's a pull request for the WordPress plugin as a reference at h5p/h5p-wordpress-plugin#125. It could easily be ported to other integrations if this pull request is accepted.