Merge pull request #54 from dfpc-coe/sensor

Sensor Parsing

index.ts

@@ -1,12 +1,13 @@
 import CoT from './lib/cot.js';
-export * as Feature from './lib/types/feature.js'
-export * as Types from './lib/types/types.js'
-export * as CoTTypes from './lib/types/cot-types.js'
-export * from './lib/chat.js'
-export * from './lib/fileshare.js'
-export * from './lib/force-delete.js'
-export * from './lib/data-package.js'
-export * from './lib/xml/basemap.js'
-export * from './lib/xml/iconset.js'
+export * as Feature from './lib/types/feature.js';
+export * as Types from './lib/types/types.js';
+export * as CoTTypes from './lib/types/cot-types.js';
+export * from './lib/chat.js';
+export * from './lib/sensor.js';
+export * from './lib/fileshare.js';
+export * from './lib/force-delete.js';
+export * from './lib/data-package.js';
+export * from './lib/xml/basemap.js';
+export * from './lib/xml/iconset.js';
 
 export default CoT;

lib/cot.ts

@@ -7,6 +7,7 @@ import type { Static } from '@sinclair/typebox';
 import type {
     Feature,
     Polygon,
+    Position,
     FeaturePropertyMission,
     FeaturePropertyMissionLayer,
 } from './types/feature.js';
@@ -16,11 +17,13 @@ import type {
     Link,
     LinkAttributes,
     VideoAttributes,
+    SensorAttributes,
     VideoConnectionEntryAttributes,
 } from './types/types.js'
 import {
     InputFeature,
 } from './types/feature.js';
+import Sensor from './sensor.js';
 import type { AllGeoJSON } from "@turf/helpers";
 import PointOnFeature from '@turf/point-on-feature';
 import Truncate from '@turf/truncate';
@@ -236,6 +239,37 @@ export default class CoT {
         return this;
     }
 
+    position(position?: Static<typeof Position>): Static<typeof Position> {
+        if (position) {
+            this.raw.event.point._attributes.lon = String(position[0]);
+            this.raw.event.point._attributes.lat = String(position[1]);
+        }
+
+        return [
+            Number(this.raw.event.point._attributes.lon),
+            Number(this.raw.event.point._attributes.lat)
+        ];
+    }
+
+    sensor(sensor?: Static<typeof SensorAttributes>): Static<typeof Polygon> | null {
+        if (!this.raw.event.detail) this.raw.event.detail = {};
+
+        if (sensor) {
+            this.raw.event.detail.sensor = {
+                _attributes: sensor
+            }
+        }
+
+        if (!this.raw.event.detail.sensor || !this.raw.event.detail.sensor._attributes) {
+            return null;
+        }
+
+        return new Sensor(
+            this.position(),
+            this.raw.event.detail.sensor._attributes
+        ).to_geojson();
+    };
+
     addLink(link: Static<typeof LinkAttributes>): CoT {
         if (!this.raw.event.detail) this.raw.event.detail = {};
 

lib/sensor.ts

@@ -0,0 +1,30 @@
+import type { Static } from '@sinclair/typebox';
+import { Position, Polygon } from './types/feature.js';
+import { SensorAttributes } from './types/types.js';
+import { sector } from '@turf/sector';
+
+export default class Sensor {
+    center: Static<typeof Position>;
+    sensor: Static<typeof SensorAttributes>;
+
+    constructor(
+        center: Static<typeof Position>,
+        sensor: Static<typeof SensorAttributes>
+    ) {
+        this.center = center;
+        this.sensor = sensor;
+    }
+
+    to_geojson(): Static<typeof Polygon> | null {
+        if (!this.sensor.range) return null;
+        if (!this.sensor.azimuth) return null;
+        if (!this.sensor.fov) return null;
+
+        return sector(
+            this.center,
+            this.sensor.range / 1000,
+            this.sensor.azimuth,
+            this.sensor.azimuth + this.sensor.fov,
+        ).geometry;
+    }
+}