59 lines
2.2 KiB
Python
59 lines
2.2 KiB
Python
import enum
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from datetime import datetime
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from typing import List, Any
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from app.extensions import db
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from app.models.activity import Activity
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class AlarmState(enum.Enum):
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UNKNOWN = 0
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OK = 1
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WARNING = 2
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CRITICAL = 3
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@property
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def emoji(self) -> str:
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if self.name == "OK":
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return "😅"
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if self.name == "WARNING":
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return "😟"
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if self.name == "CRITICAL":
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return "🚨"
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return "❓"
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class Alarm(db.Model): # type: ignore
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id = db.Column(db.Integer, primary_key=True)
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target = db.Column(db.String(255), nullable=False)
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aspect = db.Column(db.String(255), nullable=False)
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alarm_state = db.Column(db.Enum(AlarmState), default=AlarmState.UNKNOWN, nullable=False)
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state_changed = db.Column(db.DateTime(), nullable=False)
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last_updated = db.Column(db.DateTime(), nullable=False)
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text = db.Column(db.String(255), nullable=False)
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@classmethod
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def csv_header(cls) -> List[str]:
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return ["id", "target", "alarm_type", "alarm_state", "state_changed", "last_updated", "text"]
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def csv_row(self) -> List[Any]:
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return [getattr(self, x) for x in self.csv_header()]
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def update_state(self, state: AlarmState, text: str) -> None:
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if self.alarm_state is None:
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self.alarm_state = AlarmState.UNKNOWN
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if self.alarm_state != state or self.state_changed is None:
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self.state_changed = datetime.utcnow()
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activity = Activity(activity_type="alarm_state",
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text=f"[{self.aspect}] {state.emoji} Alarm state changed from "
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f"{self.alarm_state.name} to {state.name} on {self.target}: {text}.")
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if (self.alarm_state.name in ["WARNING", "CRITICAL"]
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or state.name in ["WARNING", "CRITICAL"]):
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# Notifications are only sent on recovery from warning/critical state or on entry
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# to warning/critical states. This should reduce alert fatigue.
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activity.notify()
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db.session.add(activity)
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self.alarm_state = state
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self.text = text
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self.last_updated = datetime.utcnow()
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