Project Checker

A QGIS plugin to check QGIS projects for potential issues.

This and that

• Each check must be implemented as QgsProcessingAlgorithm.
• Checks must be thread-safe. They might run on the current QgsProject.instance().
• Checks must be named as a question "if a problem exists". E.g. "DoProblemsExist" or "AreThereIssues".
• Each check must accept at least a QgsProject as input (which may be None): {"INPUT": QgsProject}
• Each check must return a dictionary: {"VERDICT": bool, "DETAILS": Any}
• The GUI currently executes the algorithms without QgsProcessingContext!

Ideas for improvements

• Show the QgsProcessingFeedback in the GUI for each chosen check (in the AlgorithmResultWidget?)
• Add more checks, see below
• Write unittests
• Allow the user to configure input parameters for algorithms in the GUI (e.g. a CRS, a list of CRS, layers, ...)
• Add algorithms that can (try to) fix specific issues, add functions that can (try to) fix issues outside the scope of QgsProcessingAlgorithms
• Design a nice logo
• ...

Ideas for checks

• IsProjectCrsInvalid
• IsProjectCrsNotInWhitelist -> QgsCoordinateReferenceSystem
• AreVectorLayersMissingSpatialIndexes -> list of QgsVectorLayers
• AreRasterLayersMissingOverviews -> list of QgsRasterLayers
• AreLayersUsingSlowFormats -> list of QgsMapLayers and their formats
• ...