add direction decoder

src/modules/geography/core/application/ports/direction-encoder.port.ts

@@ -2,4 +2,5 @@ import { Coordinates } from '../types/coordinates.type';
 
 export interface DirectionEncoderPort {
   encode(coordinates: Coordinates[]): string;
+  decode(direction: string): Coordinates[];
 }

src/modules/geography/infrastructure/postgres-direction-encoder.ts

@@ -10,4 +10,14 @@ export class PostgresDirectionEncoder implements DirectionEncoderPort {
       coordinates.map((point) => [point.lon, point.lat].join(' ')).join(),
       ")'",
     ].join('');
+  decode = (direction: string): Coordinates[] =>
+    direction
+      .split('(')[1]
+      .split(')')[0]
+      .split(',')
+      .map((coordinates) => coordinates.split(' '))
+      .map((point) => ({
+        lon: parseFloat(point[0]),
+        lat: parseFloat(point[1]),
+      }));
 }