Alert update to include location

.cspell/custom-dictionary-workspace.txt

@@ -71,6 +71,7 @@ Fingerbot
 firstparty
 fline
 FLOMASTA
+Forestfire
 foxess
 futurerate
 gecloud

apps/predbat/alertfeed.py

@@ -0,0 +1,232 @@
+# -----------------------------------------------------------------------------
+# Predbat Home Battery System
+# Copyright Trefor Southwell 2024 - All Rights Reserved
+# This application maybe used for personal use only and not for commercial use
+# -----------------------------------------------------------------------------
+# fmt off
+# pylint: disable=consider-using-f-string
+# pylint: disable=line-too-long
+# pylint: disable=attribute-defined-outside-init
+
+import requests
+import re
+from datetime import datetime, timedelta
+from config import TIME_FORMAT, TIME_FORMAT_OCTOPUS
+from utils import str2time, minutes_to_time, dp1, dp2, dp4
+import xml.etree.ElementTree as etree
+
+
+class Alertfeed:
+    def process_alerts(self):
+        """
+        Process the alerts from the alert feed
+        """
+
+        self.alerts = []
+        self.alert_active_keep = {}
+
+        alerts = self.get_arg("alerts", {})
+        if not alerts:
+            return
+        if not isinstance(alerts, dict):
+            self.log("Warn: Alerts must be a dictionary, ignoring")
+            return
+
+        latitude = self.get_state_wrapper("zone.home", attribute="latitude")
+        longitude = self.get_state_wrapper("zone.home", attribute="longitude")
+        if latitude and longitude:
+            self.log("Processing alerts for approx position latitude {} longitude {}".format(dp1(latitude), dp1(longitude)))
+
+        alert_url = alerts.get("url", "https://feeds.meteoalarm.org/feeds/meteoalarm-legacy-atom-united-kingdom")
+        area = alerts.get("area", "")
+        event = alerts.get("event", "")
+        severity = alerts.get("severity", "")
+        certainty = alerts.get("certainty", "")
+        urgency = alerts.get("urgency", "")
+        keep = alerts.get("keep", 100)
+
+        self.log("Info: Processing alerts from {}".format(alert_url))
+        alert_xml = self.download_alert_data(alert_url)
+        if alert_xml:
+            self.alerts = self.parse_alert_data(alert_xml)
+            self.alerts = self.filter_alerts(self.alerts, area, event, severity, certainty, urgency, latitude, longitude)
+            self.alert_active_keep = self.apply_alerts(self.alerts, keep)
+
+    def apply_alerts(self, alerts, keep):
+        """
+        Apply the alerts to the active alert list
+        """
+        alert_active_keep = {}
+        active_alert_text = ""
+        active_alert = False
+
+        if alerts:
+            for alert in alerts:
+                onset = alert.get("onset", None)
+                expires = alert.get("expires", None)
+                severity = alert.get("severity", "")
+                certainty = alert.get("certainty", "")
+                urgency = alert.get("urgency", "")
+                area = alert.get("areaDesc", "")
+
+                if onset and expires:
+                    onset_minutes = int((onset - self.midnight_utc).total_seconds() / 60)
+                    expires_minutes = int((expires - self.midnight_utc).total_seconds() / 60)
+                    if expires_minutes >= self.minutes_now:
+                        self.log("Info: Active alert: {} severity {} certainty {} urgency {} from {} to {} applying keep {}".format(alert.get("event"), severity, certainty, urgency, onset, expires, keep))
+                        for minute in range(onset_minutes, expires_minutes):
+                            if minute not in alert_active_keep:
+                                alert_active_keep[minute] = keep
+                            else:
+                                alert_active_keep[minute] = max(alert_active_keep[minute], keep)
+                            if minute == self.minutes_now:
+                                active_alert_text = alert.get("event") + " until " + str(expires)
+                                active_alert = True
+
+        alert_keep = alert_active_keep.get(self.minutes_now, 0)
+        alert_show = []
+        for alert in alerts:
+            item = {}
+            item["event"] = alert.get("event", "")
+            item["severity"] = alert.get("severity", "")
+            item["certainty"] = alert.get("certainty", "")
+            item["urgency"] = alert.get("urgency", "")
+            item["area"] = alert.get("areaDesc", "")
+            item["onset"] = str(alert.get("onset", ""))
+            item["expires"] = str(alert.get("expires", ""))
+            item["title"] = alert.get("title", "")
+            item["status"] = alert.get("status", "")
+            alert_show.append(item)
+        self.dashboard_item(self.prefix + ".alerts", state=active_alert_text, attributes={"friendly_name": "Weather alerts", "icon": "mdi:alert-outline", "keep": alert_keep, "alerts": alert_show})
+
+        return alert_active_keep
+
+    def is_point_in_polygon(self, lat, lon, polygon):
+        """
+        Determines if a given point is inside a polygon.
+
+        Parameters:
+            lat (float): Latitude of the point.
+            lon (float): Longitude of the point.
+            polygon (list of tuples): List of (latitude, longitude) tuples defining the polygon.
+
+        Returns:
+            bool: True if the point is inside the polygon, False otherwise.
+        """
+        num_vertices = len(polygon)
+        inside = False
+
+        # Loop through each edge of the polygon
+        for i in range(num_vertices):
+            lat1, lon1 = polygon[i]
+            lat2, lon2 = polygon[(i + 1) % num_vertices]
+
+            # Check if the point is on the boundary
+            if (lat == lat1 and lon == lon1) or (lat == lat2 and lon == lon2):
+                return True
+
+            # Check if the edge crosses the ray
+            if ((lon > lon1) != (lon > lon2)) and (lat < (lat2 - lat1) * (lon - lon1) / (lon2 - lon1) + lat1):
+                inside = not inside
+
+        return inside
+
+    def filter_alerts(self, alerts, area=None, event=None, severity=None, certainty=None, urgency=None, latitude=None, longitude=None):
+        # Filter alerts by area, event, severity, certainty, and urgency
+        result = []
+        for alert in alerts:
+            if area:
+                areaDesc = alert.get("areaDesc", [])
+                areas = areaDesc.split("|")
+                match = False
+                for check_area in areas:
+                    if area and re.search(area.lower(), check_area.lower()):
+                        match = True
+                if not match:
+                    continue
+            if event and not re.search(event.lower(), alert.get("event", "").lower()):
+                continue
+            if severity and not re.search(severity.lower(), alert.get("severity", "").lower()):
+                continue
+            if certainty and not re.search(certainty.lower(), alert.get("certainty", "").lower()):
+                continue
+            if urgency and not re.search(urgency.lower(), alert.get("urgency", "").lower()):
+                continue
+
+            if latitude and longitude:
+                polygon_text = alert.get("polygon", "")
+                polygon = []
+
+                # Polygon is a list of lat/lon pairs
+                if polygon_text:
+                    polygon_arr = polygon_text.split()
+                    for point in polygon_arr:
+                        try:
+                            lat, lon = point.split(",")
+                            polygon.append((float(lat), float(lon)))
+                        except (ValueError, TypeError):
+                            pass
+
+                # Check if the alert is relevant to our location
+                if polygon:
+                    # Check if our location is within the polygon
+                    if not self.is_point_in_polygon(latitude, longitude, polygon):
+                        continue
+
+            result.append(alert)
+        return result
+
+    def download_alert_data(self, url):
+        """
+        Download octopus free session data directly from a URL
+        """
+        # Check the cache first
+        now = datetime.now()
+        if url in self.alert_cache:
+            stamp = self.alert_cache[url]["stamp"]
+            pdata = self.alert_cache[url]["data"]
+            age = now - stamp
+            if age.seconds < (30 * 60):
+                self.log("Return cached octopus data for {} age {} minutes".format(url, dp1(age.seconds / 60)))
+                return pdata
+
+        r = requests.get(url)
+        if r.status_code not in [200, 201]:
+            self.log("Warn: Error downloading Octopus data from URL {}, code {}".format(url, r.status_code))
+            self.record_status("Warn: Error downloading Octopus free session data", debug=url, had_errors=True)
+            return None
+
+        # Return new data
+        self.alert_cache[url] = {}
+        self.alert_cache[url]["stamp"] = now
+        self.alert_cache[url]["data"] = r.text
+        return r.text
+
+    def parse_alert_data(self, xml):
+        """
+        Parse the alert data from the XML
+        """
+        namespace = "{http://www.w3.org/2005/Atom}"
+        namespace2 = "{urn:oasis:names:tc:emergency:cap:1.2}"
+        alerts = []
+        root = None
+        try:
+            root = etree.fromstring(xml)
+        except Exception as e:
+            self.log("Warn: Failed to extract alerts from xml data exception: {}".format(e))
+
+        if root:
+            for entry in root:
+                alert = {}
+                if entry.tag == f"{namespace}entry":
+                    for child in entry:
+                        tag_name = child.tag.replace(namespace, "").replace(namespace2, "")
+                        tag_value = child.text
+                        if tag_name in ["effective", "expires", "onset", "sent", "published", "updated"]:
+                            try:
+                                tag_value = str2time(tag_value)
+                            except (ValueError, TypeError):
+                                tag_value = None
+                        alert[tag_name] = tag_value
+                    alerts.append(alert)
+        return alerts

apps/predbat/config/apps.yaml

@@ -492,14 +492,13 @@ pred_bat:
   #futurerate_peak_premium_import: 14
   #futurerate_peak_premium_export: 6.5
 
-  # Alert feeds - customise to your region and desired risk/events
+  # Alert feeds - customise to your country and the alert types, severity and keep value
   #alerts:
   #  url: "https://feeds.meteoalarm.org/feeds/meteoalarm-legacy-atom-united-kingdom"
-  #  area: "North West England"
-  #  event: "Amber|Yellow|Orange|Red"
+  #  event: "(Amber|Yellow|Orange|Red).*(Wind|Snow|Fog|Rain|Thunderstorm|Avalanche|Frost|Heat|Coastal event|Flood|Forestfire|Ice|Low temperature|Storm|Tornado|Tsunami|Volcano|Wildfire)"
   #  severity: "Moderate|Severe|Extreme"
-  #  certainty: "Possible|Likely|Expected"
-  #  keep: 100
+  #  certainty: "Likely|Expected"
+  #  keep: 40
 
   # Watch list, a list of sensors to watch for changes and then update the plan if they change
   # This is useful for things like the Octopus Intelligent Slot sensor so that the plan update as soon as you plugin in

apps/predbat/predbat.py

@@ -515,6 +515,7 @@ def reset(self):
         self.battery_temperature_prediction = {}
         self.alerts = []
         self.alert_active_keep = {}
+        self.alert_cache = {}
 
         self.config_root = "./"
         for root in CONFIG_ROOTS:

apps/predbat/unit_test.py

@@ -6992,10 +6992,16 @@ def test_alert_feed(my_predbat):
     Test the alert feed
     """
     failed = 0
+    ha = my_predbat.ha_interface
     today = datetime.now().strftime("%Y-%m-%d")
     yesterday = (datetime.now() - timedelta(days=1)).strftime("%Y-%m-%d")
     tomorrow = (datetime.now() + timedelta(days=1)).strftime("%Y-%m-%d")
 
+    birmingham = [52.4823, -1.8900]
+    bristol = [51.4545, -2.5879]
+    manchester = [53.4808, -2.2426]
+    fife = [56.2082, -3.1495]
+
     alert_data = f"""<?xml version="1.0" encoding="UTF-8"?>
 <feed xmlns="http://www.w3.org/2005/Atom" xmlns:cap="urn:oasis:names:tc:emergency:cap:1.2">
   <link href="https://pubsubhubbub.appspot.com/" rel="hub"/>
@@ -7088,13 +7094,25 @@ def test_alert_feed(my_predbat):
         failed = 1
         return failed
 
+    filter = my_predbat.filter_alerts(result, latitude=birmingham[0], longitude=birmingham[1])
+    if len(filter) != 0:
+        print("ERROR: Expecting 0 alert for Birmingham got {}".format(len(filter)))
+        failed = 1
+        return failed
+
+    filter = my_predbat.filter_alerts(result, latitude=fife[0], longitude=fife[1])
+    if len(filter) != 1:
+        print("ERROR: Expecting 1 alert for Fife got {}".format(len(filter)))
+        failed = 1
+        return failed
+
     filter = my_predbat.filter_alerts(result, area="Grampian", severity="Moderate|Severe", certainty="Likely")
     if len(filter) != 1:
         print("ERROR: Expecting 1 alert for Grampian got {}".format(len(filter)))
         failed = 1
         return failed
 
-    filter = my_predbat.filter_alerts(result, event="Yellow|Amber")
+    filter = my_predbat.filter_alerts(result, event="(Amber|Yellow|Orange|Red).*(Wind|Snow|Fog|Thunderstorm|Avalanche|Frost|Heat|Coastal event|Flood|Forestfire|Ice|Low temperature|Storm|Tornado|Tsunami|Volcano|Wildfire)")
     if len(filter) != 2:
         print("ERROR: Expecting 2 alerts for Yellow|Amber but got {}".format(len(filter)))
         failed = 1
@@ -7524,6 +7542,12 @@ def test_alert_feed(my_predbat):
         print("ERROR: Expecting show should be {} got {}".format(expect_show, show))
         failed = 1
 
+    alert_text = ha.get_state(my_predbat.prefix + ".alerts")
+    expect_text = "Yellow wind warning until " + today + " 23:59:59+00:00"
+    if alert_text != expect_text:
+        print("ERROR: Expecting alert text to be '{}' got '{}'".format(expect_text, alert_text))
+        failed = 1
+
     return failed