create ad WIP, extract geography methods to dedicated module

src/modules/geography/adapters/secondaries/geo-timezone-finder.ts

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+import { Injectable } from '@nestjs/common';
+import { IFindTimezone } from '../../domain/interfaces/timezone-finder.interface';
+import { find } from 'geo-tz';
+
+@Injectable()
+export class GeoTimezoneFinder implements IFindTimezone {
+  timezones = (lon: number, lat: number): Array<string> => find(lat, lon);
+}

src/modules/geography/adapters/secondaries/geodesic.ts

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+import { Injectable } from '@nestjs/common';
+import { Geodesic as Geolib, GeodesicClass } from 'geographiclib-geodesic';
+import { IGeodesic } from '../../domain/interfaces/geodesic.interface';
+
+@Injectable()
+export class Geodesic implements IGeodesic {
+  private geod: GeodesicClass;
+
+  constructor() {
+    this.geod = Geolib.WGS84;
+  }
+
+  inverse = (
+    lon1: number,
+    lat1: number,
+    lon2: number,
+    lat2: number,
+  ): { azimuth: number; distance: number } => {
+    const { azi2: azimuth, s12: distance } = this.geod.Inverse(
+      lat1,
+      lon1,
+      lat2,
+      lon2,
+    );
+    return { azimuth, distance };
+  };
+}

src/modules/geography/domain/interfaces/geodesic.interface.ts

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+export interface IGeodesic {
+  inverse(
+    lon1: number,
+    lat1: number,
+    lon2: number,
+    lat2: number,
+  ): {
+    azimuth: number;
+    distance: number;
+  };
+}

src/modules/geography/domain/interfaces/timezone-finder.interface.ts

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+export interface IFindTimezone {
+  timezones(lon: number, lat: number): Array<string>;
+}

src/modules/geography/geography.module.ts

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+import { Module } from '@nestjs/common';
+import { GeoTimezoneFinder } from './adapters/secondaries/geo-timezone-finder';
+import { Geodesic } from './adapters/secondaries/geodesic';
+
+@Module({
+  providers: [GeoTimezoneFinder, Geodesic],
+  exports: [GeoTimezoneFinder, Geodesic],
+})
+export class GeographyModule {}

src/modules/geography/tests/unit/geo-timezone-finder.spec.ts

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+import { GeoTimezoneFinder } from '../../adapters/secondaries/geo-timezone-finder';
+
+describe('Geo TZ Finder', () => {
+  it('should be defined', () => {
+    const timezoneFinder: GeoTimezoneFinder = new GeoTimezoneFinder();
+    expect(timezoneFinder).toBeDefined();
+  });
+  it('should get timezone for Nancy(France) as Europe/Paris', () => {
+    const timezoneFinder: GeoTimezoneFinder = new GeoTimezoneFinder();
+    const timezones = timezoneFinder.timezones(6.179373, 48.687913);
+    expect(timezones.length).toBe(1);
+    expect(timezones[0]).toBe('Europe/Paris');
+  });
+});

src/modules/geography/tests/unit/geodesic.spec.ts

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+import { Geodesic } from '../../adapters/secondaries/geodesic';
+
+describe('Matcher geodesic', () => {
+  it('should be defined', () => {
+    const geodesic: Geodesic = new Geodesic();
+    expect(geodesic).toBeDefined();
+  });
+  it('should get inverse values', () => {
+    const geodesic: Geodesic = new Geodesic();
+    const inv = geodesic.inverse(0, 0, 1, 1);
+    expect(Math.round(inv.azimuth)).toBe(45);
+    expect(Math.round(inv.distance)).toBe(156900);
+  });
+});