clan_cli: Rewrite ClanURI
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Qubasa
@@ -5,13 +5,13 @@ import urllib.request
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from dataclasses import dataclass
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from enum import Enum, member
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from pathlib import Path
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from typing import Any, Self
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from typing import Any
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from .errors import ClanError
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# Define an enum with different members that have different values
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class ClanScheme(Enum):
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class ClanUrl(Enum):
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# Use the dataclass decorator to add fields and methods to the members
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@member
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@dataclass
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@@ -33,137 +33,116 @@ class ClanScheme(Enum):
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# Parameters defined here will be DELETED from the nested uri
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# so make sure there are no conflicts with other webservices
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@dataclass
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class ClanParameters:
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flake_attr: str = "defaultVM"
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class MachineParams:
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dummy_opt: str = "dummy"
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@dataclass
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class MachineData:
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name: str = "defaultVM"
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params: MachineParams = dataclasses.field(default_factory=MachineParams)
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# Define the ClanURI class
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class ClanURI:
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_orig_uri: str
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_nested_uri: str
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_components: urllib.parse.ParseResult
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url: ClanUrl
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machines: list[MachineData]
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# Initialize the class with a clan:// URI
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def __init__(self, uri: str) -> None:
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self.machines = []
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# users might copy whitespace along with the uri
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uri = uri.strip()
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self._full_uri = uri
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self._orig_uri = uri
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# Check if the URI starts with clan://
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# If it does, remove the clan:// prefix
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if uri.startswith("clan://"):
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self._nested_uri = uri[7:]
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else:
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raise ClanError(f"Invalid scheme: expected clan://, got {uri}")
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raise ClanError(f"Invalid uri: expected clan://, got {uri}")
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# Parse the URI into components
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# scheme://netloc/path;parameters?query#fragment
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# url://netloc/path;parameters?query#fragment
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self._components = urllib.parse.urlparse(self._nested_uri)
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# Parse the query string into a dictionary
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query = urllib.parse.parse_qs(self._components.query)
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# Replace the query string in the components with the new query string
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clean_comps = self._components._replace(
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query=self._components.query, fragment=""
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)
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# Create a new dictionary with only the parameters we want
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# example: https://example.com?flake_attr=myVM&password=1234
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# becomes: https://example.com?password=1234
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# clan_params = {"flake_attr": "myVM"}
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# query = {"password": ["1234"]}
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clan_params: dict[str, str] = {}
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for field in dataclasses.fields(ClanParameters):
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if field.name in query:
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values = query[field.name]
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# Parse the URL into a ClanUrl object
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self.url = self._parse_url(clean_comps)
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# Parse the fragment into a list of machine queries
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# Then parse every machine query into a MachineParameters object
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machine_frags = list(
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filter(lambda x: len(x) > 0, self._components.fragment.split("#"))
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)
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for machine_frag in machine_frags:
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machine = self._parse_machine_query(machine_frag)
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self.machines.append(machine)
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# If there are no machine fragments, add a default machine
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if len(machine_frags) == 0:
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self.machines.append(MachineData())
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def _parse_url(self, comps: urllib.parse.ParseResult) -> ClanUrl:
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comb = (
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comps.scheme,
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comps.netloc,
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comps.path,
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comps.params,
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comps.query,
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comps.fragment,
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)
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match comb:
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case ("file", "", path, "", "", _) | ("", "", path, "", "", _): # type: ignore
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url = ClanUrl.LOCAL.value(Path(path).expanduser().resolve()) # type: ignore
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case _:
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url = ClanUrl.REMOTE.value(comps.geturl()) # type: ignore
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return url
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def _parse_machine_query(self, machine_frag: str) -> MachineData:
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comp = urllib.parse.urlparse(machine_frag)
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query = urllib.parse.parse_qs(comp.query)
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machine_name = comp.path
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machine_params: dict[str, Any] = {}
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for dfield in dataclasses.fields(MachineParams):
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if dfield.name in query:
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values = query[dfield.name]
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if len(values) > 1:
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raise ClanError(f"Multiple values for parameter: {field.name}")
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clan_params[field.name] = values[0]
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raise ClanError(f"Multiple values for parameter: {dfield.name}")
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machine_params[dfield.name] = values[0]
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# Remove the field from the query dictionary
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# clan uri and nested uri share one namespace for query parameters
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# we need to make sure there are no conflicts
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del query[field.name]
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# Reencode the query dictionary into a query string
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real_query = urllib.parse.urlencode(query, doseq=True)
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del query[dfield.name]
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params = MachineParams(**machine_params)
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machine = MachineData(name=machine_name, params=params)
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return machine
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# If the fragment contains a #, use the part after the # as the flake_attr
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# on multiple #, use the first one
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if self._components.fragment != "":
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clan_params["flake_attr"] = self._components.fragment.split("#")[0]
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def get_orig_uri(self) -> str:
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return self._orig_uri
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# Replace the query string in the components with the new query string
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self._components = self._components._replace(query=real_query, fragment="")
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# Create a ClanParameters object from the clan_params dictionary
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self.params = ClanParameters(**clan_params)
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comb = (
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self._components.scheme,
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self._components.netloc,
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self._components.path,
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self._components.params,
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self._components.query,
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self._components.fragment,
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)
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match comb:
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case ("file", "", path, "", "", "") | ("", "", path, "", "", _): # type: ignore
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self.scheme = ClanScheme.LOCAL.value(Path(path).expanduser().resolve()) # type: ignore
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case _:
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self.scheme = ClanScheme.REMOTE.value(self._components.geturl()) # type: ignore
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def get_internal(self) -> str:
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match self.scheme:
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case ClanScheme.LOCAL.value(path):
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def get_url(self) -> str:
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match self.url:
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case ClanUrl.LOCAL.value(path):
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return str(path)
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case ClanScheme.REMOTE.value(url):
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case ClanUrl.REMOTE.value(url):
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return url
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case _:
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raise ClanError(f"Unsupported uri components: {self.scheme}")
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def get_full_uri(self) -> str:
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return self._full_uri
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def get_id(self) -> str:
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return f"{self.get_internal()}#{self.params.flake_attr}"
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@classmethod
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def from_path(
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cls, # noqa
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path: Path,
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flake_attr: str | None = None,
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params: dict[str, Any] | ClanParameters | None = None,
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) -> Self:
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return cls.from_str(str(path), flake_attr=flake_attr, params=params)
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@classmethod
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def from_str(
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cls, # noqa
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url: str,
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flake_attr: str | None = None,
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params: dict[str, Any] | ClanParameters | None = None,
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) -> Self:
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if flake_attr is not None and params is not None:
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raise ClanError("flake_attr and params are mutually exclusive")
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prefix = "clan://"
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if url.startswith(prefix):
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url = url[len(prefix) :]
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if params is None and flake_attr is None:
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return cls(f"clan://{url}")
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comp = urllib.parse.urlparse(url)
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query = urllib.parse.parse_qs(comp.query)
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if isinstance(params, dict):
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query.update(params)
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elif isinstance(params, ClanParameters):
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query.update(params.__dict__)
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elif flake_attr is not None:
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query["flake_attr"] = [flake_attr]
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else:
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raise ClanError(f"Unsupported params type: {type(params)}")
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new_query = urllib.parse.urlencode(query, doseq=True)
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comp = comp._replace(query=new_query)
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new_url = urllib.parse.urlunparse(comp)
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return cls(f"clan://{new_url}")
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raise ClanError(f"Unsupported uri components: {self.url}")
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def __str__(self) -> str:
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return self.get_full_uri()
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return self.get_orig_uri()
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def __repr__(self) -> str:
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return f"ClanURI({self.get_full_uri()})"
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return f"ClanURI({self})"
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