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# coding: utf-8
import hashlib
import uuid
from datetime import timedelta as td
from django.conf import settings
from django.contrib.auth.models import User
from django.core.urlresolvers import reverse
from django.db import models
from django.utils import timezone
from hc.api import transports
from hc.lib import emails
STATUSES = (
("up", "Up"),
("down", "Down"),
("new", "New"),
("paused", "Paused")
)
DEFAULT_TIMEOUT = td(days=1)
DEFAULT_GRACE = td(hours=1)
CHANNEL_KINDS = (("email", "Email"), ("webhook", "Webhook"),
("hipchat", "HipChat"),
("slack", "Slack"), ("pd", "PagerDuty"), ("po", "Pushover"),
("victorops", "VictorOps"))
PO_PRIORITIES = {
-2: "lowest",
-1: "low",
0: "normal",
1: "high",
2: "emergency"
}
class Check(models.Model):
class Meta:
# sendalerts command will query using these
index_together = ["status", "user", "alert_after"]
name = models.CharField(max_length=100, blank=True)
tags = models.CharField(max_length=500, blank=True)
code = models.UUIDField(default=uuid.uuid4, editable=False, db_index=True)
user = models.ForeignKey(User, blank=True, null=True)
created = models.DateTimeField(auto_now_add=True)
timeout = models.DurationField(default=DEFAULT_TIMEOUT)
grace = models.DurationField(default=DEFAULT_GRACE)
n_pings = models.IntegerField(default=0)
last_ping = models.DateTimeField(null=True, blank=True)
alert_after = models.DateTimeField(null=True, blank=True, editable=False)
status = models.CharField(max_length=6, choices=STATUSES, default="new")
def name_then_code(self):
if self.name:
return self.name
return str(self.code)
def url(self):
return settings.PING_ENDPOINT + str(self.code)
def log_url(self):
return settings.SITE_ROOT + reverse("hc-log", args=[self.code])
def email(self):
return "%s@%s" % (self.code, settings.PING_EMAIL_DOMAIN)
def send_alert(self):
if self.status not in ("up", "down"):
raise NotImplementedError("Unexpected status: %s" % self.status)
errors = []
for channel in self.channel_set.all():
error = channel.notify(self)
if error not in ("", "no-op"):
errors.append((channel, error))
return errors
def get_status(self):
if self.status == "new":
return self.status
now = timezone.now()
if self.last_ping + self.timeout + self.grace > now:
return "up"
return "down"
def in_grace_period(self):
if not self.last_ping:
return False
up_ends = self.last_ping + self.timeout
grace_ends = up_ends + self.grace
return up_ends < timezone.now() < grace_ends
def assign_all_channels(self):
if self.user:
channels = Channel.objects.filter(user=self.user)
self.channel_set.add(*channels)
def tags_list(self):
return [t.strip() for t in self.tags.split(" ") if t.strip()]
class Ping(models.Model):
n = models.IntegerField(null=True)
owner = models.ForeignKey(Check)
created = models.DateTimeField(auto_now_add=True)
scheme = models.CharField(max_length=10, default="http")
remote_addr = models.GenericIPAddressField(blank=True, null=True)
method = models.CharField(max_length=10, blank=True)
ua = models.CharField(max_length=200, blank=True)
class Channel(models.Model):
code = models.UUIDField(default=uuid.uuid4, editable=False)
user = models.ForeignKey(User)
created = models.DateTimeField(auto_now_add=True)
kind = models.CharField(max_length=20, choices=CHANNEL_KINDS)
value = models.TextField(blank=True)
email_verified = models.BooleanField(default=False)
checks = models.ManyToManyField(Check)
def assign_all_checks(self):
checks = Check.objects.filter(user=self.user)
self.checks.add(*checks)
def make_token(self):
seed = "%s%s" % (self.code, settings.SECRET_KEY)
seed = seed.encode("utf8")
return hashlib.sha1(seed).hexdigest()
def send_verify_link(self):
args = [self.code, self.make_token()]
verify_link = reverse("hc-verify-email", args=args)
verify_link = settings.SITE_ROOT + verify_link
emails.verify_email(self.value, {"verify_link": verify_link})
@property
def transport(self):
if self.kind == "email":
return transports.Email(self)
elif self.kind == "webhook":
return transports.Webhook(self)
elif self.kind == "slack":
return transports.Slack(self)
elif self.kind == "hipchat":
return transports.HipChat(self)
elif self.kind == "pd":
return transports.PagerDuty(self)
elif self.kind == "victorops":
return transports.VictorOps(self)
elif self.kind == "po":
return transports.Pushover(self)
else:
raise NotImplementedError("Unknown channel kind: %s" % self.kind)
def notify(self, check):
# Make 3 attempts--
for x in range(0, 3):
error = self.transport.notify(check) or ""
if error in ("", "no-op"):
break # Success!
if error != "no-op":
n = Notification(owner=check, channel=self)
n.check_status = check.status
n.error = error
n.save()
return error
def test(self):
return self.transport().test()
@property
def po_value(self):
assert self.kind == "po"
user_key, prio = self.value.split("|")
prio = int(prio)
return user_key, prio, PO_PRIORITIES[prio]
@property
def value_down(self):
assert self.kind == "webhook"
parts = self.value.split("\n")
return parts[0]
@property
def value_up(self):
assert self.kind == "webhook"
parts = self.value.split("\n")
return parts[1] if len(parts) == 2 else ""
def latest_notification(self):
return Notification.objects.filter(channel=self).latest()
class Notification(models.Model):
class Meta:
get_latest_by = "created"
owner = models.ForeignKey(Check)
check_status = models.CharField(max_length=6)
channel = models.ForeignKey(Channel)
created = models.DateTimeField(auto_now_add=True)
error = models.CharField(max_length=200, blank=True)