sanic-org/sanic-routing

import logging

from sanic_routing import BaseRouter

logging.basicConfig(level=logging.DEBUG)


class Router(BaseRouter):
    def get(self, path, *args, **kwargs):
        return self.resolve(path, *args, **kwargs)


router = Router()

router.add("/<foo>", lambda: ...)
router.finalize()
router.tree.display()
logging.info(router.find_route_src)

route, handler, params = router.get("/matchme", method="BASE", extra=None)

<Node: level=0>
    <Node: part=__dynamic__:str, level=1, groups=[<RouteGroup: path=<foo:str> len=1>], dynamic=True>

def find_route(path, method, router, basket, extra):
    parts = tuple(path[1:].split(router.delimiter))
    num = len(parts)
    
    # node=1 // part=__dynamic__:str
    if num == 1:  # CHECK 1
        try:
            basket['__matches__'][0] = str(parts[0])
        except ValueError:
            pass
        else:
            # Return 1
            return router.dynamic_routes[('<__dynamic__:str>',)][0], basket
    raise NotFound

router.add("/path/to/<foo>", lambda: ...)
router.add("/path/to/<foo:int>", lambda: ...)
router.add("/path/to/different/<foo>", lambda: ...)
router.add("/path/to/different/<foo>", lambda: ..., methods=["one", "two"])

<RouteGroup: path=path/to/<foo:str> len=1>
<RouteGroup: path=path/to/<foo:int> len=1>
<RouteGroup: path=path/to/different/<foo:str> len=2>

<Route: path=path/to/<foo:str>>
<Route: path=path/to/<foo:int>>
<Route: path=path/to/different/<foo:str>>
<Route: path=path/to/different/<foo:str>>

<Node: level=0>
    <Node: part=path, level=1>
        <Node: part=to, level=2>
            <Node: part=different, level=3>
                <Node: part=__dynamic__:str, level=4, groups=[<RouteGroup: path=path/to/different/<foo:str> len=2>], dynamic=True>
            <Node: part=__dynamic__:int, level=3, groups=[<RouteGroup: path=path/to/<foo:int> len=1>], dynamic=True>
            <Node: part=__dynamic__:str, level=3, groups=[<RouteGroup: path=path/to/<foo:str> len=1>], dynamic=True>

def find_route(path, method, router, basket, extra):
    parts = tuple(path[1:].split(router.delimiter))
    num = len(parts)
    
    # node=1 // part=path
    if num > 1:  # CHECK 1
        if parts[0] == "path":  # CHECK 4
            
            # node=1.1 // part=to
            if num > 2:  # CHECK 1
                if parts[1] == "to":  # CHECK 4
                    
                    # node=1.1.1 // part=different
                    if num > 3:  # CHECK 1
                        if parts[2] == "different":  # CHECK 4
                            
                            # node=1.1.1.1 // part=__dynamic__:str
                            if num == 4:  # CHECK 1
                                try:
                                    basket['__matches__'][3] = str(parts[3])
                                except ValueError:
                                    pass
                                else:
                                    if method in frozenset({'one', 'two'}):
                                        route_idx = 0
                                    elif method in frozenset({'BASE'}):
                                        route_idx = 1
                                    else:
                                        raise NoMethod
                                    # Return 1.1.1.1
                                    return router.dynamic_routes[('path', 'to', 'different', '<__dynamic__:str>')][route_idx], basket
                    
                    # node=1.1.2 // part=__dynamic__:int
                    if num >= 3:  # CHECK 1
                        try:
                            basket['__matches__'][2] = int(parts[2])
                        except ValueError:
                            pass
                        else:
                            if num == 3:  # CHECK 5
                                # Return 1.1.2
                                return router.dynamic_routes[('path', 'to', '<__dynamic__:int>')][0], basket
                    
                    # node=1.1.3 // part=__dynamic__:str
                    if num >= 3:  # CHECK 1
                        try:
                            basket['__matches__'][2] = str(parts[2])
                        except ValueError:
                            pass
                        else:
                            if num == 3:  # CHECK 5
                                # Return 1.1.3
                                return router.dynamic_routes[('path', 'to', '<__dynamic__:str>')][0], basket
    raise NotFound