l-systems/converter.py

from csv import reader as csv_reader
from pprint import pformat
from pprint import pp as pprint
from sys import argv, stderr
from xml.dom.minidom import parseString as xml_parser
from xml.etree import ElementTree


class System:
    """Represents an L-System"""

    def __init__(
        self,
        name: str,
        base: list[str],
        axiom: str,
        substitutions: list[tuple[str, str]],
        interpretations: list[tuple[str, str]],
    ):
        self.name = name
        """System name"""

        self.base = base
        """Set used"""

        self.axiom = axiom
        """Axiom used at the start of iterations"""

        self.substitutions = substitutions
        """
        Substitution for each member of the base,
        represented as a couple (member, substitution)
        """

        self.interpretations = interpretations
        """
        Interpretation for each member of the base,
        represented as a couple (member, interpretation)
        """

        # TODO: Est-ce que on garde ça ??
        # Interpretation of extra symbols added if necessary
        extra_symbols = ["[", "]"]
        for _, substitution in substitutions:
            if any(symbol in substitution for symbol in extra_symbols):
                self.interpretations.extend(
                    [(extra_symbols[0], "STORE"), (extra_symbols[1], "RESTORE")]
                )
                break

    def __repr__(self):
        return pformat(self.__dict__, compact=True, width=120, sort_dicts=False)

    def to_xml(self) -> ElementTree.Element:
        """Convert the current system into an XML element"""
        system = ElementTree.Element("lsystem")

        base = ElementTree.SubElement(system, "base")
        base.text = "".join(self.base)

        axiom = ElementTree.SubElement(system, "axiom")
        axiom.text = self.axiom

        substitutions = ElementTree.SubElement(system, "substitutions")
        for member, substitution in self.substitutions:
            sub_element = ElementTree.SubElement(substitutions, "substitution")
            sub_element.set("member", member)
            sub_element.text = substitution

        interpretations = ElementTree.SubElement(system, "interpretations")
        for member, interpretation in self.interpretations:
            inter_element = ElementTree.SubElement(interpretations, "interpretation")
            inter_element.set("member", member)
            inter_element.text = interpretation

        return system


def data_reader(path: str, delimiter: str = ","):
    """Read a CSV file and returns a list of L-System"""
    res: list[System] = []
    with open(path) as csv_file:
        data = csv_reader(csv_file, delimiter=delimiter)
        for system in data:
            name = system[0]
            base = list(system[1])
            axiom = system[2]
            substitutions = [(v, system[3 + i]) for i, v in enumerate(base)]
            interpretations = [
                (v, system[3 + i + len(substitutions)]) for i, v in enumerate(base)
            ]

            res.append(System(name, base, axiom, substitutions, interpretations))

    return res


def lsystems_xml(systems: list[System]) -> ElementTree.Element:
    """Convert list of L-system structure into XML"""

    root = ElementTree.Element("lsystems")

    for system in systems:
        root.append(system.to_xml())

    return root


if __name__ == "__main__":
    if len(argv) != 2:
        pprint(f"Syntax error:\n\tpython {argv[0]} file.csv", stream=stderr)
        exit(1)
    # TODO: Check if we have to dump to stdout or we write into a file
    #       use `argparse` for cli arguments

    # Read data
    lsystems = data_reader(argv[1])

    # Generate XML
    xml = lsystems_xml(lsystems)

    # Print XML
    dom = xml_parser(ElementTree.tostring(xml))
    print(dom.toprettyxml(encoding="UTF-8").decode())