HFP-3065 Allow to delete library if circular dependency #125
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A long time ago in a galaxy far far away, the
H5PLibraryListclass 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_librariesdatabase table.When merged in, this pull request will check for a direct circular dependency (no transitive circles of more than two libraries) when calling
getLibraryUsage()and set ahasCircularEditorDepencendyflag in the return value if appropriate. That flag will be used to check whether a library can be deleted (if the respective editor library is the only library that requires the library at stake) or not.In order to allow deletion using the GUI of the
H5PLibraryListclass, the pull request for the H5P core at h5p/h5p-php-library#101 will have to me merged in as well.This pull request could easily be ported to other integrations if it is accepted.