adding H1-FPN decoding

lib/MessageDecoder.ts

@@ -27,6 +27,7 @@ export class MessageDecoder {
     this.registerPlugin(new Plugins.Label_44_ON(this));
     this.registerPlugin(new Plugins.Label_44_POS(this));
     this.registerPlugin(new Plugins.Label_B6_Forwardslash(this));
+    this.registerPlugin(new Plugins.Label_H1_FPN(this));
     this.registerPlugin(new Plugins.Label_H1_M1BPOS(this));
     this.registerPlugin(new Plugins.Label_H1_POS(this));
     this.registerPlugin(new Plugins.Label_80(this));

lib/plugins/Label_H1_FPN.test.ts

@@ -0,0 +1,129 @@
+import { MessageDecoder } from '../MessageDecoder';
+import { Label_H1_FPN } from './Label_H1_FPN';
+
+test('decodes Label H1 Preamble FPN landing', () => {
+  const decoder = new MessageDecoder();
+  const decoderPlugin = new Label_H1_FPN(decoder);
+
+  expect(decoderPlugin.decode).toBeDefined();
+  expect(decoderPlugin.name).toBe('label-h1-fpn');
+  expect(decoderPlugin.qualifiers).toBeDefined();
+  expect(decoderPlugin.qualifiers()).toEqual({
+    labels: ['H1'],
+    preambles: ['FPN'],
+  });
+
+  const text = 'FPN/RI:DA:KEWR:AA:KDFW:CR:EWRDFW01(17L)..SAAME.J6.HVQ.Q68.LITTR..MEEOW..FEWWW:A:SEEVR4.FEWWW:F:VECTOR..DISCO..RIVET:AP:ILS 17L.RIVET:F:TACKEC8B5';
+  const decodeResult = decoderPlugin.decode({ text: text });
+  console.log(JSON.stringify(decodeResult, null, 2));
+
+  expect(decodeResult.decoded).toBe(true);
+  expect(decodeResult.decoder.decodeLevel).toBe('partial');
+  expect(decodeResult.decoder.name).toBe('label-h1-fpn');
+  expect(decodeResult.formatted.description).toBe('Flight Plan');
+  expect(decodeResult.formatted.items.length).toBe(6);
+  expect(decodeResult.formatted.items[0].label).toBe('Route Status');
+  expect(decodeResult.formatted.items[0].value).toBe('Route Inactive');
+  expect(decodeResult.formatted.items[1].label).toBe('Origin');
+  expect(decodeResult.formatted.items[1].value).toBe('KEWR');
+  expect(decodeResult.formatted.items[2].label).toBe('Destination');
+  expect(decodeResult.formatted.items[2].value).toBe('KDFW');
+  expect(decodeResult.formatted.items[3].label).toBe('Aircraft Route');
+  expect(decodeResult.formatted.items[3].value).toBe('VECTOR >> DISCO >> RIVET');
+  expect(decodeResult.formatted.items[4].label).toBe('Aircraft Route');
+  expect(decodeResult.formatted.items[4].value).toBe('TACKE');
+  expect(decodeResult.formatted.items[5].label).toBe('Message Checksum');
+  expect(decodeResult.formatted.items[5].value).toBe('0xc8b5');
+});
+test('decodes Label H1 Preamble FPN full flight', () => {
+  const decoder = new MessageDecoder();
+  const decoderPlugin = new Label_H1_FPN(decoder);
+
+  expect(decoderPlugin.decode).toBeDefined();
+  expect(decoderPlugin.name).toBe('label-h1-fpn');
+  expect(decoderPlugin.qualifiers).toBeDefined();
+  expect(decoderPlugin.qualifiers()).toEqual({
+    labels: ['H1'],
+    preambles: ['FPN'],
+  });
+
+  // https://app.airframes.io/messages/2161768398
+  const text = 'FPN/FNAAL1956/RP:DA:KPHL:AA:KPHX:CR:PHLPHX61:R:27L(26O):D:PHL3:A:EAGUL6.ZUN:AP:ILS26..AIR,N40010W080490.J110.BOWRR..VLA,N39056W089097..STL,N38516W090289..GIBSN,N38430W092244..TYGER,N38410W094050..GCK,N37551W100435..DIXAN,N36169W105573..ZUN,N34579W109093293B';
+  const decodeResult = decoderPlugin.decode({ text: text });
+  console.log(JSON.stringify(decodeResult, null, 2));
+
+  expect(decodeResult.decoded).toBe(true);
+  expect(decodeResult.decoder.decodeLevel).toBe('partial');
+  expect(decodeResult.decoder.name).toBe('label-h1-fpn');
+  expect(decodeResult.raw.flight_number).toBe('AAL1956')
+  expect(decodeResult.formatted.description).toBe('Flight Plan');
+  expect(decodeResult.formatted.items.length).toBe(5);
+  expect(decodeResult.formatted.items[0].label).toBe('Route Status');
+  expect(decodeResult.formatted.items[0].value).toBe('Route Planned');
+  expect(decodeResult.formatted.items[1].label).toBe('Origin');
+  expect(decodeResult.formatted.items[1].value).toBe('KPHL');
+  expect(decodeResult.formatted.items[2].label).toBe('Destination');
+  expect(decodeResult.formatted.items[2].value).toBe('KPHX');
+  expect(decodeResult.formatted.items[3].label).toBe('Runway');
+  expect(decodeResult.formatted.items[3].value).toBe('27L(26O)');
+  expect(decodeResult.formatted.items[4].label).toBe('Message Checksum');
+  expect(decodeResult.formatted.items[4].value).toBe('0x293b');
+});
+
+test('decodes Label H1 Preamble FPN in-flight', () => {
+  const decoder = new MessageDecoder();
+  const decoderPlugin = new Label_H1_FPN(decoder);
+
+  expect(decoderPlugin.decode).toBeDefined();
+  expect(decoderPlugin.name).toBe('label-h1-fpn');
+  expect(decoderPlugin.qualifiers).toBeDefined();
+  expect(decoderPlugin.qualifiers()).toEqual({
+    labels: ['H1'],
+    preambles: ['FPN'],
+  });
+
+  // https://app.airframes.io/messages/2161761202
+  const text = 'FPN/FNUAL1187/RP:DA:KSFO:AA:KPHX:F:KAYEX,N36292W120569..LOSHN,N35509W120000..BOILE,N34253W118016..BLH,N33358W114457DDFB';
+  const decodeResult = decoderPlugin.decode({ text: text });
+  console.log(JSON.stringify(decodeResult, null, 2));
+
+  expect(decodeResult.decoded).toBe(true);
+  expect(decodeResult.decoder.decodeLevel).toBe('full');
+  expect(decodeResult.decoder.name).toBe('label-h1-fpn');
+  expect(decodeResult.raw.flight_number).toBe('UAL1187')
+  expect(decodeResult.formatted.description).toBe('Flight Plan');
+  expect(decodeResult.formatted.items.length).toBe(5);
+  expect(decodeResult.formatted.items[0].label).toBe('Route Status');
+  expect(decodeResult.formatted.items[0].value).toBe('Route Planned');
+  expect(decodeResult.formatted.items[1].label).toBe('Origin');
+  expect(decodeResult.formatted.items[1].value).toBe('KSFO');
+  expect(decodeResult.formatted.items[2].label).toBe('Destination');
+  expect(decodeResult.formatted.items[2].value).toBe('KPHX');
+  expect(decodeResult.formatted.items[3].label).toBe('Aircraft Route');
+  expect(decodeResult.formatted.items[3].value).toBe('KAYEX(36.292 N, 120.569 W) >> LOSHN(35.509 N, 120 W) >> BOILE(34.253 N, 118.016 W) >> BLH(33.358 N, 114.457 W)');
+  expect(decodeResult.formatted.items[4].label).toBe('Message Checksum');
+  expect(decodeResult.formatted.items[4].value).toBe('0xddfb');
+});
+
+test('decodes Label H1 Preamble FPN <invalid>', () => {
+  const decoder = new MessageDecoder();
+  const decoderPlugin = new Label_H1_FPN(decoder);
+
+  expect(decoderPlugin.decode).toBeDefined();
+  expect(decoderPlugin.name).toBe('label-h1-fpn');
+  expect(decoderPlugin.qualifiers).toBeDefined();
+  expect(decoderPlugin.qualifiers()).toEqual({
+    labels: ['H1'],
+    preambles: ['FPN'],
+  });
+
+  const text = 'FPN Bogus message';
+  const decodeResult = decoderPlugin.decode({ text: text });
+  console.log(JSON.stringify(decodeResult, null, 2));
+
+  expect(decodeResult.decoded).toBe(false);
+  expect(decodeResult.decoder.decodeLevel).toBe('none');
+  expect(decodeResult.decoder.name).toBe('label-h1-fpn');
+  expect(decodeResult.formatted.description).toBe('Flight Plan');
+  expect(decodeResult.message.text).toBe(text);
+});

lib/plugins/Label_H1_FPN.ts

@@ -0,0 +1,158 @@
+import { decode } from 'base85';
+import { DateTimeUtils } from '../DateTimeUtils';
+import { DecoderPlugin } from '../DecoderPlugin';
+import { CoordinateUtils } from '../utils/coordinate_utils';
+import { RouteUtils } from '../utils/route_utils';
+
+export class Label_H1_FPN extends DecoderPlugin {
+  name = 'label-h1-fpn';
+
+  qualifiers() { // eslint-disable-line class-methods-use-this
+    return {
+      labels: ["H1"],
+      preambles: ['FPN'],
+    };
+  }
+
+  decode(message: any, options: any = {} ): any {
+    let decodeResult: any = this.defaultResult;
+    decodeResult.decoder.name = this.name;
+    decodeResult.formatted.description = 'Flight Plan';
+    decodeResult.message = message;
+
+    const checksum = message.text.slice(-4);
+    const data = message.text.slice(0, message.text.length-4).split(':');
+
+    if(data[0].startsWith('FPN/')) {
+      let allKnownFields = parseHeader(decodeResult, data[0]);
+      for(let i=1; i< data.length; i+=2) {
+        const key = data[i];
+        const value = data[i+1];
+        // TODO: discuss how store commented out bits as both raw and formatted
+        switch(key) {
+          // case 'A': // Arrival Procedure (?)
+          // break;
+          case 'AA':
+            addArrivalAirport(decodeResult, value);
+          break;
+          // case 'CR': // Current Route (?)
+          // break;
+          // case 'D': // Departure Procedure
+          // break;
+          case 'DA':
+            addDepartureAirport(decodeResult, value);
+          break;
+          case 'F': // First Waypoint
+            addRoute(decodeResult, value);
+          break;
+          case 'R':
+            addDepartureRunway(decodeResult, value);
+          default:
+            if(allKnownFields) {
+              decodeResult.remaining.text = '';
+              allKnownFields = false;
+            }
+            decodeResult.remaining.text += `:${data[i]}`;
+            decodeResult.decoder.decodeLevel = 'partial';
+        }
+      }
+
+      addChecksum(decodeResult, checksum);
+      decodeResult.decoded = true;
+      if(allKnownFields) {
+        decodeResult.decoder.decodeLevel = 'full';
+      }
+    } else {// Unknown
+      if (options?.debug) {
+        console.log(`Decoder: Unknown H1 message: ${message.text}`);
+      }
+      decodeResult.remaining.text = message.text;
+      decodeResult.decoded = false;
+      decodeResult.decoder.decodeLevel = 'none';
+    }
+	  return decodeResult;
+  }
+}
+
+export default {};
+
+function parseHeader(decodeResult: any, header: string): boolean {
+  let allKnownFields = true;
+  const fields = header.split('/');
+  if(fields.length == 3) {
+    decodeResult.raw.flight_number = fields[1].substring(2); // Strip off 'FN'
+  } else if(fields.length > 3) {
+    decodeResult.remaining.text = fields.slice(2,-1).join('/');
+    allKnownFields = false
+  }
+  decodeResult.raw.route_status = fields[fields.length - 1];
+
+  var text;
+  if(decodeResult.raw.route_status == 'RP'){
+    text = 'Route Planned';
+  } else if(decodeResult.raw.route_status == 'RI') {
+    text = 'Route Inactive';
+  } else {
+    text = decodeResult.raw.route_status;
+  }
+  decodeResult.formatted.items.push({
+    type: 'status',
+    code: 'ROUTE_STATUS',
+    label: 'Route Status',
+    value: text,
+  });
+  return allKnownFields;
+};
+
+function addChecksum(decodeResult: any, value: string) {
+  decodeResult.raw.checksum = Number("0x"+value);
+  decodeResult.formatted.items.push({
+    type: 'message_checksum',
+    code: 'CHECKSUM',
+    label: 'Message Checksum',
+    value: '0x' + ('0000' + decodeResult.raw.checksum.toString(16)).slice(-4),
+  });    
+};
+
+function addArrivalAirport(decodeResult: any, value: string) {
+  decodeResult.raw.arrival_icao = value;
+  decodeResult.formatted.items.push({
+    type: 'destination',
+    code: 'DST',
+    label: 'Destination',
+    value: decodeResult.raw.arrival_icao,
+  });
+};
+
+function addDepartureAirport(decodeResult: any, value: string) {
+  decodeResult.raw.departure_icao = value;
+  decodeResult.formatted.items.push({
+    type: 'origin',
+    code: 'ORG',
+    label: 'Origin',
+    value: decodeResult.raw.departure_icao,
+  });
+};
+
+function addDepartureRunway(decodeResult: any, value: string) {
+  decodeResult.raw.runway = value;
+  decodeResult.formatted.items.push({
+    type: 'runway',
+    label: 'Runway',
+    value: decodeResult.raw.runway,
+  });
+};
+
+function addRoute(decodeResult: any, value: string) {
+  const route = value.split('.');
+  decodeResult.raw.route = route.map((leg)=> RouteUtils.getWaypoint(leg));
+  decodeResult.formatted.items.push({
+    type: 'aircraft_route',
+    code: 'ROUTE',
+    label: 'Aircraft Route',
+    value: RouteUtils.routeToString(decodeResult.raw.route),
+  });
+};
+
+
+

lib/plugins/official.ts

@@ -3,6 +3,7 @@ export * from './Label_12_N_Space';
 export * from './Label_15';
 export * from './Label_15_FST';
 export * from './Label_16_N_Space';
+export * from './Label_1M_Slash';
 export * from './Label_20_POS';
 export * from './Label_30_Slash_EA';
 export * from './Label_44_ETA';
@@ -14,9 +15,9 @@ export * from './Label_80';
 export * from './Label_8E';
 export * from './Label_B6';
 export * from './Label_ColonComma';
+export * from './Label_H1_FPN';
 export * from './Label_H1_M1BPOS';
 export * from './Label_H1_M1BPRG';
-export * from './Label_1M_Slash';
 export * from './Label_H1_POS';
 export * from './Label_SQ';
 export * from './Label_QR';

lib/utils/route_utils.ts

@@ -4,7 +4,7 @@ import { CoordinateUtils } from "./coordinate_utils";
 export class RouteUtils {
 
     public static routeToString(route: Waypoint[]): string {
-        return route.map((x) => RouteUtils.waypointToString(x)).join( ' > ');
+        return route.map((x) => RouteUtils.waypointToString(x)).join( ' > ').replaceAll('>  >', '>>');
     }
 
     public static waypointToString(waypoint: Waypoint): string {
@@ -17,6 +17,20 @@ export class RouteUtils {
         }
         return s;
     }
+
+    public static getWaypoint(leg: string): Waypoint {
+        const waypoint = leg.split(',');
+        if(waypoint.length ==2) {
+        const position = CoordinateUtils.decodeStringCoordinates(waypoint[1]);
+        return {name: waypoint[0], latitude: position.latitude, longitude: position.longitude};
+        }
+        if(leg.length == 14) { //looks like coordinates
+        const position = CoordinateUtils.decodeStringCoordinates(leg);
+        return {name: waypoint[0], latitude: position.latitude, longitude: position.longitude};
+        }
+        return {name: leg};
+    }
+
     // move out if we want public
     private static timestampToString(time: number, format: 'tod' | 'epoch'): string {
         const date = new Date(time * 1000);