Currently the `getPath` methods returned `NULL` in case when a file with the specified ID does not exist. This however mandates that developers are checking for the `NULL` case and if they do not the door for bugs with all kind of impact is widely opened.
This is especially harmful if used in context with Views where the final result is limited based on the result of `getPath`, if `getPath` returns `NULL` PHP type juggles this to an empty string resulting in all possible kind of bugs.
While one could argue that this is a misusage of the API the fact is that it is very often misused and an exception will trigger an immediate stop of execution as well as log this behaviour and show a pretty error page.
I also adjusted some usages where I believe that we need to catch these errors, in most cases this is though simply an error that should hard-fail.
Some code paths called the `normalizePath` functionality with types other than a string which resulted in unexpected behaviour.
Thus the function is now manually casting the type to a string and I corrected the usage in list.php as well.
It's better to encode the string to prevent possible (yet unknown) bugs in combination with PHP's type juggling.
Previously the boolean statements evaluated to either an empty string (false) or a not empty one (true, then it was 1). Not it always evaluates to false or true.
This also removes a stray - that was not intended there but shouldn't have produced any bugs. Just to increase readability.
Thanks @nickvergessen for spotting.
Addresses https://github.com/owncloud/core/pull/13235/files#r22852319
`normalizePath` is a rather expensive operation and called multiple times for a single path for every file related operation.
In my development installation with about 9GB of data and 60k files this leads to a performance boost of 24% - in seconds that are 1.86s (!) - for simple searches. With more files the impact will be even more noticeable. Obviously this affects every operation that has in any regard something to do with using OC\Files\Filesystem.
Part of https://github.com/owncloud/core/issues/13221
The check for invalid paths is actually over-complicated and performed twice resulting in a performance penalty. Additionally, I decided to add unit-tests to that function.
Part of https://github.com/owncloud/core/issues/13221
As constants not defined within a class cannot be automatically found by the
autoloader moving those constants into a class makes them accessible to
code which uses them.
Signed-off-by: Stephan Peijnik <speijnik@anexia-it.com>
