Database and storage integrity check and clean-up

[adriendupuis]

• Remove unused files from storage.
• Check that for each location, all its ancestors still exist.
• Check that for each content object, there is at least one version and if it's the published one
• Check that for each content object field, there is a content type field definition.
• Check ezcontentobject.is_hidden, ezcontentobject_tree.is_hidden and ezcontentobject_tree.is_invisible consistency
• Check that
  • database declared languages are available in config (common recurrent omission) (see 18376c4)
  • languages used by content are still available (after removing an used language)

[adriendupuis]

str_replace('/images/', '/images/_aliases/*/', $dirPath)

[adriendupuis]

-- Content objects with missing attribute

SELECT co.id, co.current_version, cc.identifier, cca.identifier
  FROM ezcontentobject AS co
    JOIN ezcontentclass AS cc ON cc.id = co.contentclass_id AND NOT cc.version
    JOIN ezcontentclass_attribute AS cca ON cc.id = cca.contentclass_id
    LEFT JOIN ezcontentobject_attribute AS coa ON cca.id = coa.contentclassattribute_id AND co.current_version = coa.version
  WHERE coa.id IS NULL
;

-- Content objects with undefined attribute

SELECT co.id, cc.identifier, coa.data_type_string, coa.contentclassattribute_id, coa.id
  FROM ezcontentobject AS co
    JOIN ezcontentclass AS cc ON cc.id = co.contentclass_id
    JOIN ezcontentobject_attribute AS coa ON co.id = coa.contentobject_id AND co.current_version = coa.version
    LEFT JOIN ezcontentclass_attribute AS cca ON cca.id = coa.contentclassattribute_id
  WHERE cca.id IS NULL
;

TODO: languages