wbo-svg-to-json.py

import xml.sax
import sys
import json

class InkscapeSvgHandler(xml.sax.ContentHandler):
    def __init__(self):
        self.o = {}
        self.t = 1554660678511
    def startElement(self, name, attrs):
        if name not in ("path","line","rect"):
            return
        self.t += 1
        o = {
            "color": attrs.get("stroke", "#000000"),
            "size":  float(attrs.get("stroke-width", 1)),
            "opacity": float(attrs.get("opacity", 1)),
            "id": attrs.get("id"),
            "time": self.t,
            "_children": [],
        }
        if name == "path":
            o["type"] = "line"
            o["tool"] = "Pencil"
            if "d" in attrs:
                d = attrs["d"]
                pts = [float(x) for x in d.split() if not x.isalpha()]
                for x,y in zip(pts[::2], pts[1::2]):
                    o["_children"].append({
                        "x": x,
                        "y": y,
                        "parent": o["id"],
                        "type": "child",
                        "tool": "Pencil",
                    })
        elif name=="line":
            o["type"] = "straight"
            o["tool"] = "Straight line"
            o["x"] = float(attrs.get("x1"))
            o["y"] = float(attrs.get("y1"))
            o["x2"] = float(attrs.get("x2"))
            o["y2"] = float(attrs.get("y2"))
        elif name=="rect":
            o["type"] = "rect"
            o["tool"] = "Rectangle"
            o["x"] = float(attrs.get("x"))
            o["y"] = float(attrs.get("y"))
            o["x2"] = float(attrs.get("width")) + o["x"]
            o["y2"] = float(attrs.get("height")) + o["y"]
        self.o[o["id"]] = o

parser = xml.sax.make_parser()
handler = InkscapeSvgHandler()
parser.setContentHandler(handler)
parser.parse(sys.stdin)
json.dump(handler.o, sys.stdout)