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	Added null checking to activity stats (#169)
Position.getInfo().* might return null sometimes, so best check and avoid a numerical error. @KPWhiver My co-author is away presently, would you mind giving this simple change the once over? Thanks!
This commit is contained in:
		@@ -30,3 +30,4 @@
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|   2.15  | Better support for templates by isolating erroneous returns and marking the menu item. |
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					|   2.15  | Better support for templates by isolating erroneous returns and marking the menu item. |
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|   2.16  | Bug fix for lack of phone connection when starting the application. Includes new activity reporting features from [KPWhiver](https://github.com/KPWhiver) covering steps, heart rate, floors climbed and descended, and respiration rate. |
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					|   2.16  | Bug fix for lack of phone connection when starting the application. Includes new activity reporting features from [KPWhiver](https://github.com/KPWhiver) covering steps, heart rate, floors climbed and descended, and respiration rate. |
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|   2.17  | Bug fix for reporting activity metrics that are not found on some devices. |
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					|   2.17  | Bug fix for reporting activity metrics that are not found on some devices. |
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					|   2.18  | Bug fix for reporting activity metrics that might be `null` sometimes. This is unsimulatable situation, so this version is a change based on an informed guess. |
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@@ -79,13 +79,13 @@ class BackgroundServiceDelegate extends System.ServiceDelegate {
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    private function doUpdate(activity as Lang.Number or Null, sub_activity as Lang.Number or Null) {
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					    private function doUpdate(activity as Lang.Number or Null, sub_activity as Lang.Number or Null) {
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): Making API call.");
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Making API call.");
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        var position = Position.getInfo();
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					        var position = Position.getInfo();
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): gps: " + position.position.toDegrees());
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): GPS      : " + position.position.toDegrees());
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): speed: " + position.speed);
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Speed    : " + position.speed);
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): course: " + position.heading + "rad (" + (position.heading * 180 / Math.PI) + "°)");
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Course   : " + position.heading + " radians (" + (position.heading * 180 / Math.PI) + "°)");
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): altitude: " + position.altitude);
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Altitude : " + position.altitude);
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): battery: " + System.getSystemStats().battery);
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Battery  : " + System.getSystemStats().battery);
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): charging: " + System.getSystemStats().charging);
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Charging : " + System.getSystemStats().charging);
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        // System.println("BackgroundServiceDelegate onTemporalEvent(): activity: " + Activity.getProfileInfo().name);
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					        // System.println("BackgroundServiceDelegate onTemporalEvent(): Activity : " + Activity.getProfileInfo().name);
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        // Don't use Settings.* here as the object lasts < 30 secs and is recreated each time the background service is run
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					        // Don't use Settings.* here as the object lasts < 30 secs and is recreated each time the background service is run
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@@ -102,17 +102,28 @@ class BackgroundServiceDelegate extends System.ServiceDelegate {
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                    accuracy = 10;
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					                    accuracy = 10;
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                    break;
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					                    break;
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            }
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					            }
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					            var data = { "gps_accuracy" => accuracy };
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					            // Only add the non-null fields as all the values are optional in Home Assistant, and it avoid submitting fake values.
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					            if (position.position != null) {
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					                data.put("gps", position.position.toDegrees());
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					            }
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					            if (position.speed != null) {
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					                data.put("speed", Math.round(position.speed));
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					            }
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					            if (position.heading != null) {
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					                data.put("course", Math.round(position.heading * 180 / Math.PI));
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					            }
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					            if (position.altitude != null) {
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					                data.put("altitude", Math.round(position.altitude));
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					            }
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					            // System.println("BackgroundServiceDelegate onTemporalEvent(): data = " + data.toString());
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            Communications.makeWebRequest(
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					            Communications.makeWebRequest(
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                (Properties.getValue("api_url") as Lang.String) + "/webhook/" + (Properties.getValue("webhook_id") as Lang.String),
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					                (Properties.getValue("api_url") as Lang.String) + "/webhook/" + (Properties.getValue("webhook_id") as Lang.String),
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                {
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					                {
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                    "type" => "update_location",
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					                    "type" => "update_location",
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                    "data" => {
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					                    "data" => data,
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                        "gps"          => position.position.toDegrees(),
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                        "gps_accuracy" => accuracy,
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                        "speed"        => Math.round(position.speed),
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                        "course"       => Math.round(position.heading * 180 / Math.PI),
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                        "altitude"     => Math.round(position.altitude),
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                    }
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                },
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					                },
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                {
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					                {
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                    :method       => Communications.HTTP_REQUEST_METHOD_POST,
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					                    :method       => Communications.HTTP_REQUEST_METHOD_POST,
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