def message_from_json()

in python/moz/l10n/message/from_json.py [0:0]

• 28 lines of code
• 12 McCabe index (conditional complexity)

def message_from_json(json: list[Any] | dict[str, Any]) -> Message:
    """
    Marshal the JSON output of `moz.l10n.message.to_json()`
    back into a parsed `moz.l10n.message.data.Message`.

    May raise `MF2ValidationError`.
    """
    if isinstance(json, Mapping) and "sel" in json:
        return SelectMessage(
            declarations={
                name: _expression_from_json(value)
                for name, value in json["decl"].items()
            },
            selectors=tuple(VariableRef(sel) for sel in json["sel"]),
            variants={
                tuple(
                    key if isinstance(key, str) else CatchallKey(key["*"] or None)
                    for key in variant["keys"]
                ): _pattern_from_json(variant["pat"])
                for variant in json["alt"]
            },
        )
    else:
        declarations = {}
        if isinstance(json, Mapping):
            if "decl" in json:
                declarations = {
                    name: _expression_from_json(value)
                    for name, value in json["decl"].items()
                }
            pattern = _pattern_from_json(json["msg"])
        else:
            pattern = _pattern_from_json(json)
        return PatternMessage(pattern, declarations)