from bs4 import BeautifulSoup
import pandas,pyproj, re
from shapely.geometry import Point

def process_nodes(data):
    transformer = pyproj.Transformer.from_crs('EPSG:2950', 'EPSG:4326', always_xy=True)
    ELEMENT_LIST = []
    for node in data:
        attr = dict(node.attrs)
        lat, lon = transformer.transform(attr['x'], attr['y'])
        attr['coordinates'] = Point(lon,lat)
        ELEMENT_LIST.append(attr)
    return pandas.DataFrame(ELEMENT_LIST)

def process_links(data):
    ELEMENT_LIST = []
    for element in data:
        ELEMENT_LIST.append(dict(element.attrs))
    return pandas.DataFrame(ELEMENT_LIST)

def process_links_attr(data):
    ELEMENT_LIST = []
    for element in data:
        if not element.find("attributes"):
            continue
        ELEMENT_DICT = {"id": element.get("id")}
        for attr in element.find("attributes").find_all("attribute"):
            attr_name = attr.get("name")
            attr_value = attr.get_text()
            attr_name = attr_name.replace(":", "_")
            ELEMENT_DICT[attr_name] = attr_value
        
        ELEMENT_LIST.append(ELEMENT_DICT)
    return pandas.DataFrame(ELEMENT_LIST)