build.controllers

Complexity

Total Complexity

40

Size/Duplication

Total Lines	343
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes

0

31 Methods

Rating	Name	Duplication	Size	Complexity
A	TopoController.add_interface_metadata()	0	8	1
A	TopoController.enable_switch()	0	3	1
A	TopoController.disable_interface()	0	4	1
A	TopoController.bootstrap_indexes()	0	10	3
A	TopoController.get_topology()	0	5	1
A	TopoController.get_links()	0	9	1
A	TopoController.add_switch_metadata()	0	6	1
A	TopoController._update_switch()	0	4	1
A	TopoController.deactivate_link()	0	14	1
A	TopoController.add_link_metadata()	0	8	1
A	TopoController.disable_switch()	0	4	1
A	TopoController.delete_link_metadata_key()	0	5	1
A	TopoController.get_switches()	0	9	1
A	TopoController.deactivate_switch()	0	3	1
A	TopoController.delete_switch_metadata_key()	0	5	1
A	TopoController._update_interface()	0	14	2
A	TopoController.activate_interface()	0	3	1
A	TopoController.enable_link()	0	3	1
A	TopoController._update_link()	0	4	1
A	TopoController.disable_link()	0	3	1
A	TopoController._set_updated_at()	0	7	2
A	TopoController.enable_interface()	0	4	1
A	TopoController.__init__()	0	6	2
B	TopoController.bulk_upsert_interface_details()	0	31	5
A	TopoController.delete_interface_metadata_key()	0	6	1
A	TopoController.upsert_switch()	0	16	1
A	TopoController.get_interfaces()	0	11	1
A	TopoController.deactivate_interface()	0	4	1
A	TopoController.upsert_link()	0	46	1
A	TopoController.get_interfaces_details()	0	7	1
A	TopoController.activate_link()	0	14	1

"""TopoController."""

import time
# pylint: disable=invalid-name
from datetime import datetime
from threading import Lock
from typing import List, Optional, Tuple

import pymongo
from pymongo.collection import ReturnDocument
from pymongo.operations import UpdateOne

from kytos.core import log
from kytos.core.db import Mongo
from napps.kytos.topology.db.models import (InterfaceDetailDoc, LinkDoc,
                                            SwitchDoc)


class TopoController:
    """TopoController."""

    def __init__(self, get_mongo=lambda: Mongo()) -> None:

The variable Mongo does not seem to be defined.

        """Constructor of TopoController."""
        self.mongo = get_mongo()
        self.db_client = self.mongo.client
        self.db = self.db_client[self.mongo.db_name]
        self.interface_details_lock = Lock()

    def bootstrap_indexes(self) -> None:
        """Bootstrap all topology related indexes."""
        index_tuples = [
            ("switches", [("interfaces.id", pymongo.ASCENDING)]),
            ("links", [("endpoints.id", pymongo.ASCENDING)]),
        ]
        for collection, keys in index_tuples:
            if self.mongo.bootstrap_index(collection, keys):
                log.info(
                    f"Created DB index {keys}, "
                    f"collection: {collection})"
                )

    def get_topology(self) -> dict:
        """Get topology from DB."""
        switches = self.get_switches()
        links = self.get_links()
        return {"topology": {**links, **switches}}

    def get_switches(self) -> dict:
        """Get switches from DB."""
        switches = self.db.switches.aggregate(
            [
                {"$sort": {"_id": 1}},
                {"$project": SwitchDoc.projection()},
            ]
        )
        return {"switches": {value["id"]: value for value in switches}}

    def get_links(self) -> dict:
        """Get links from DB."""
        links = self.db.links.aggregate(
            [
                {"$sort": {"_id": 1}},
                {"$project": LinkDoc.projection()},
            ]
        )
        return {"links": {value["id"]: value for value in links}}

    def get_interfaces(self) -> dict:
        """Get interfaces from DB."""
        interfaces = self.db.switches.aggregate(
            [
                {"$sort": {"_id": 1}},
                {"$project": {"interfaces": 1, "_id": 0}},
                {"$unwind": "$interfaces"},
                {"$replaceRoot": {"newRoot": "$interfaces"}},
            ]
        )
        return {"interfaces": {value["id"]: value for value in interfaces}}

    @staticmethod
    def _set_updated_at(update_expr: dict) -> None:
        """Set updated_at on $set expression."""
        if "$set" in update_expr:
            update_expr["$set"].update({"updated_at": datetime.utcnow()})
        else:
            update_expr.update({"$set": {"updated_at": datetime.utcnow()}})

    def _update_switch(self, dpid: str, update_expr: dict) -> Optional[dict]:
        """Try to find one switch and update it given an update expression."""
        self._set_updated_at(update_expr)
        return self.db.switches.find_one_and_update({"_id": dpid}, update_expr)

    def upsert_switch(self, dpid: str, switch_dict: dict) -> Optional[dict]:
        """Update or insert switch."""
        utc_now = datetime.utcnow()
        model = SwitchDoc(
            **{**switch_dict, **{"_id": dpid, "updated_at": utc_now}}
        )
        updated = self.db.switches.find_one_and_update(
            {"_id": dpid},
            {
                "$set": model.dict(exclude={"inserted_at"}),
                "$setOnInsert": {"inserted_at": utc_now},
            },
            return_document=ReturnDocument.AFTER,
            upsert=True,
        )
        return updated

    def enable_switch(self, dpid: str) -> Optional[dict]:
        """Try to find one switch and enable it."""
        return self._update_switch(dpid, {"$set": {"enabled": True}})

    def deactivate_switch(self, dpid: str) -> Optional[dict]:
        """Try to find one switch and deactivate it."""
        return self._update_switch(dpid, {"$set": {"active": False}})

    def disable_switch(self, dpid: str) -> Optional[dict]:
        """Try to find one switch and disable it."""
        return self._update_switch(
            dpid, {"$set": {"enabled": False, "interfaces.$[].enabled": False}}
        )

    def add_switch_metadata(self, dpid: str, metadata: dict) -> Optional[dict]:
        """Try to find a switch and add to its metadata."""
        update_expr = {
            "$set": {f"metadata.{k}": v for k, v in metadata.items()}
        }
        return self._update_switch(dpid, update_expr)

    def delete_switch_metadata_key(
        self, dpid: str, key: str
    ) -> Optional[dict]:
        """Try to find a switch and delete a metadata key."""
        return self._update_switch(dpid, {"$unset": {f"metadata.{key}": ""}})

    def enable_interface(self, interface_id: str) -> Optional[dict]:
        """Try to enable one interface and its embedded object on links."""
        return self._update_interface(
            interface_id, {"$set": {"enabled": True}}
        )

    def disable_interface(self, interface_id: str) -> Optional[dict]:
        """Try to disable one interface and its embedded object on links."""
        return self._update_interface(
            interface_id, {"$set": {"enabled": False}}
        )

    def activate_interface(self, interface_id: str) -> Optional[dict]:
        """Try to activate one interface."""
        return self._update_interface(interface_id, {"$set": {"active": True}})

    def deactivate_interface(self, interface_id: str) -> Optional[dict]:
        """Try to deactivate one interface."""
        return self._update_interface(
            interface_id, {"$set": {"active": False}}
        )

    def add_interface_metadata(
        self, interface_id: str, metadata: dict
    ) -> Optional[dict]:
        """Try to find an interface and add to its metadata."""
        update_expr = {
            "$set": {f"metadata.{k}": v for k, v in metadata.items()}
        }
        return self._update_interface(interface_id, update_expr)

    def delete_interface_metadata_key(
        self, interface_id: str, key: str
    ) -> Optional[dict]:
        """Try to find an interface and delete a metadata key."""
        return self._update_interface(
            interface_id, {"$unset": {f"metadata.{key}": ""}}
        )

    def _update_interface(
        self, interface_id: str, update_expr: dict
    ) -> Optional[dict]:
        """Try to update one interface and its embedded object on links."""
        self._set_updated_at(update_expr)
        interfaces_expression = {}
        for operator, values in update_expr.items():
            interfaces_expression[operator] = {
                f"interfaces.$.{k}": v for k, v in values.items()
            }
        return self.db.switches.find_one_and_update(
            {"interfaces.id": interface_id},
            interfaces_expression,
            return_document=ReturnDocument.AFTER,
        )

    def upsert_link(self, link_id: str, link_dict: dict) -> dict:
        """Update or insert a Link."""
        utc_now = datetime.utcnow()

        endpoint_a = link_dict.get("endpoint_a")
        endpoint_b = link_dict.get("endpoint_b")
        model = LinkDoc(
            **{
                **link_dict,
                **{
                    "updated_at": utc_now,
                    "_id": link_id,
                    "endpoints": [endpoint_a, endpoint_b],
                },
            }
        )
        updated = self.db.links.find_one_and_update(
            {"_id": link_id},
            {
                "$set": model.dict(exclude={"inserted_at"}),
                "$setOnInsert": {"inserted_at": utc_now},
            },
            return_document=ReturnDocument.AFTER,
            upsert=True,
        )
        self.db.switches.find_one_and_update(
            {"interfaces.id": endpoint_a},
            {
                "$set": {
                    "interfaces.$.link_id": link_id,
                    "interfaces.$.link_side": "endpoint_a",
                    "updated_at": utc_now,
                }
            },
        )
        self.db.switches.find_one_and_update(
            {"interfaces.id": endpoint_b},
            {
                "$set": {
                    "interfaces.$.link_id": link_id,
                    "interfaces.$.link_side": "endpoint_b",
                    "updated_at": utc_now,
                }
            },
        )
        return updated

    def _update_link(self, link_id: str, update_expr: dict) -> Optional[dict]:
        """Try to find one link and update it given an update expression."""
        self._set_updated_at(update_expr)
        return self.db.links.find_one_and_update({"_id": link_id}, update_expr)

    def enable_link(self, link_id: str) -> Optional[dict]:
        """Try to find one link and enable it."""
        return self._update_link(link_id, {"$set": {"enabled": True}})

    def disable_link(self, link_id: str) -> Optional[dict]:
        """Try to find one link and disable it."""
        return self._update_link(link_id, {"$set": {"enabled": False}})

    def deactivate_link(self, link_id: str,
                        last_status_change: Optional[float] = None,
                        last_status_is_active=False
                        ) -> Optional[dict]:
        """Try to find one link and deactivate it."""
        # It might be worth using datetime in the future
        last_status_change = last_status_change or time.time()
        return self._update_link(
            link_id,
            {
                "$set": {
                    "metadata.last_status_change": last_status_change,
                    "metadata.last_status_is_active": last_status_is_active,
                    "active": False,
                }
            },
        )

    def activate_link(self, link_id: str,
                      last_status_change: Optional[float] = None,
                      last_status_is_active=True
                      ) -> Optional[dict]:
        """Try to find one link and activate it."""
        # It might be worth using datetime in the future
        last_status_change = last_status_change or time.time()
        return self._update_link(
            link_id,
            {
                "$set": {
                    "metadata.last_status_change": last_status_change,
                    "metadata.last_status_is_active": last_status_is_active,
                    "active": True,
                }
            },
        )

    def add_link_metadata(
        self, link_id: str, metadata: dict
    ) -> Optional[dict]:
        """Try to find link and add to its metadata."""
        update_expr = {
            "$set": {f"metadata.{k}": v for k, v in metadata.items()}
        }
        return self._update_link(link_id, update_expr)

    def delete_link_metadata_key(
        self, link_id: str, key: str
    ) -> Optional[dict]:
        """Try to find a link and delete a metadata key."""
        return self._update_link(link_id, {"$unset": {f"metadata.{key}": ""}})

    def bulk_upsert_interface_details(
        self, ids_details: List[Tuple[str, dict]]
    ) -> Optional[dict]:
        """Update or insert interfaces details."""
        utc_now = datetime.utcnow()
        ops = []
        for _id, detail_dict in ids_details:
            ops.append(
                UpdateOne(
                    {"_id": _id},
                    {
                        "$set": InterfaceDetailDoc(
                            **{
                                **detail_dict,
                                **{
                                    "updated_at": utc_now,
                                    "_id": _id,
                                },
                            }
                        ).dict(exclude={"inserted_at"}),
                        "$setOnInsert": {"inserted_at": utc_now},
                    },
                    upsert=True,
                ),
            )

        with self.interface_details_lock:
            with self.db_client.start_session() as session:
                with session.start_transaction():
                    return self.db.interface_details.bulk_write(
                        ops, ordered=False, session=session
                    )

    def get_interfaces_details(
        self, interface_ids: List[str]
    ) -> Optional[dict]:
        """Try to get interfaces details given a list of interface ids."""
        return self.db.interface_details.aggregate(
            [
                {"$match": {"_id": {"$in": interface_ids}}},
            ]
        )