def parse_trans_unit()

in python/moz/l10n/formats/xliff/parse_trans_unit.py [0:0]

• 40 lines of code
• 20 McCabe index (conditional complexity)

def parse_trans_unit(unit: etree._Element, is_xcode: bool) -> Entry[Message]:
    id = unit.attrib.get("id", None)
    if id is None:
        raise ValueError(f'Missing "id" attribute for <trans-unit>: {unit}')
    meta = attrib_as_metadata(unit, None, ("id",))
    if unit.text and not unit.text.isspace():
        raise ValueError(f"Unexpected text in <trans-unit>: {unit.text}")

    target = None
    note = None
    seen: dict[str, int] = defaultdict(int)
    for el in unit:
        if isinstance(el, etree._Comment):
            meta.append(Metadata("comment()", el.text))
        else:
            name = pretty_name(el, el.tag)
            if name == "target":
                if target:
                    raise ValueError(f"Duplicate <target> in <trans-unit> {id}: {unit}")
                target = el
                meta += attrib_as_metadata(el, "target")
            elif name == "note" and note is None and el.text:
                note = el
                note_attrib = attrib_as_metadata(el, "note")
                if note_attrib:
                    meta += note_attrib
                elif el != unit[-1]:
                    # If there are elements after this <note>,
                    # add a marker for its relative position.
                    meta.append(Metadata("note", ""))
                seen[name] += 1
            else:
                idx = seen[name] + 1
                base = f"{name}[{idx}]" if idx > 1 else name
                meta += element_as_metadata(el, base, True)
                seen[name] = idx
        if el.tail and not el.tail.isspace():
            raise ValueError(f"Unexpected text in <trans-unit>: {el.tail}")

    comment = "" if note is None else note.text or ""
    msg = PatternMessage(
        [] if target is None else list(parse_pattern(target, is_xcode))
    )
    return Entry((id,), msg, comment, meta)