If an author name begins with a multibyte UTF8 character, the name is not converted to an initial

[jnugent]

Please follow the general troubleshooting steps first:

• [X] I read the README and followed the instructions.
• [X] I am sure that the used CSL metadata follows the CSL schema.
• [X] I use a valid CSL stylesheet

Bug reports:

We first received a report of this behaviour in one of our hosted OJS installations. A Norwegian journal who had authors with the first name Åse reported that citations generated with this name did not convert this to Å but instead kept the whole name. I've since duplicated this in other OJS installations, and have also just cloned the citeproc-php repository and changed one of the author names in the sample JSON to Åse and the problem occurs there as well, when running the example/index.php script.

In my investigating I discovered that the file ./src/Util/StringHelper.php contains a method called initializeBySpaceOrHyphen that appears to split the first letter off of a string. If a string like Åse is passed in, the first letter is correctly split off but then the StringHelper::isLatinString method returns true here (it probably should not?) and then the call to ctype_upper fails, which causes the method to return the entire string again. I was able to get this to correctly work by temporarily negating the test for StringHelper::isLatinString in the if statement.

Used CSL stylesheet:

apa.csl

Used CSL metadata

Please replace these lines with your used metadata, for instance:

[
    {
        "author": [
            {
                "family": "Anderson",
                "given": "John"
            },
            {
                "family": "Brown",
                "given": "Åse"
            }
        ],
        "id": "ITEM-2",
        "type": "book",
        "title": "Two authors writing a book"
    }
]

[ronste]

Hi,

here's another example were this bug kicks in: https://www.cgt-journal.org/index.php/cgt/article/view/11

[RewindLife]

Our journal also has the same issue with failed abbreviation of authors' first names starting with characters with diactritics. Can this issue be assigned a bug status? Any idea how quickly this can be fixed. Thank you in advance.