def get_fluent_source_pattern()

in fluent/migrate/_context.py [0:0]

• 17 lines of code
• 8 McCabe index (conditional complexity)

    def get_fluent_source_pattern(self, path: str, key: str):
        """Get a pattern from a localized Fluent source.

        If the key contains a `.`, does an attribute lookup.
        Used by the `COPY_PATTERN` transform.
        """
        resource = self.localization_resources[path]
        msg_key, _, attr_key = key.partition(".")
        found = None
        for entry in resource.body:
            if isinstance(entry, (FTL.Message, FTL.Term)):
                if entry.id.name == msg_key:
                    found = entry
                    break
        if found is None:
            return None
        if not attr_key:
            return found.value
        for attribute in found.attributes:
            if attribute.id.name == attr_key:
                return attribute.value
        return None