Merge branch 'master' of github.com:manuelbieh/geolib

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+# github: [manuelbieh]
+open_collective: geolib
+issuehunt: manuelbieh/geolib

README.md

@@ -546,3 +546,23 @@ geolib.convertArea(298678, 'km2'));
 ```
 
 Returns the converted area as number.
+
+
+### `wktToPolygon(wkt)`
+
+Converts the Well-known text (a.k.a WKT) to polygon that Geolib understands.
+[https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry#Geometric_Objects](WKT)
+
+```js
+geolib.wktToPolygon('POLYGON ((30 10.54321, 40 40, 20 40, 10 20, 30 10))');
+// [
+//     { latitude: 10.54321, longitude: 30 },
+//     { latitude: 40, longitude: 40 },
+//     { latitude: 40, longitude: 20 },
+//     { latitude: 20, longitude: 10 },
+//     { latitude: 10, longitude: 30 },}
+// ]
+```
+
+Returns the array of coordinates.
+

package.json

@@ -1,6 +1,6 @@
 {
   "name": "geolib",
-  "version": "3.0.3",
+  "version": "3.1.0",
   "description": "",
   "main": "lib/index.js",
   "module": "es/index.js",

src/wktToPolygon.test.js

@@ -0,0 +1,19 @@
+import wktToPolygon from './wktToPolygon';
+
+describe('wktToPolygon', () => {
+    it('converts a WKT to Polygon', () => {
+        const wkt = 'POLYGON ((30 10.54321, 40 40, 20 40, 10 20, 30 10))';
+        expect(wktToPolygon(wkt)).toEqual([
+            { latitude: 10.54321, longitude: 30 },
+            { latitude: 40, longitude: 40 },
+            { latitude: 40, longitude: 20 },
+            { latitude: 20, longitude: 10 },
+            { latitude: 10, longitude: 30 },
+        ]);
+    });
+
+    it('throw error when is not a POLYGON', () => {
+        const wkt = 'MULTIPOLYGON (((3 2, 45 4, 3 2)), ((15 5, 4 1, 15 5)))';
+        expect(() => wktToPolygon(wkt)).toThrowError('Invalid wkt.');
+    });
+});

src/wktToPolygon.ts

@@ -0,0 +1,21 @@
+// Converts a wkt text to polygon
+const wktToPolygon = (wkt: string) => {
+    if (!wkt.startsWith('POLYGON')) {
+        throw new Error('Invalid wkt.');
+    }
+    const coordsText = wkt
+        .slice(wkt.indexOf('(') + 2, wkt.indexOf(')'))
+        .split(', ');
+
+    const polygon = coordsText.map((coordText) => {
+        const [longitude, latitude] = coordText.split(' ');
+        return {
+            longitude: parseFloat(longitude),
+            latitude: parseFloat(latitude),
+        };
+    });
+
+    return polygon;
+};
+
+export default wktToPolygon;

yarn.lock

@@ -3151,14 +3151,16 @@ eslint-scope@^4.0.0, eslint-scope@^4.0.3:
     estraverse "^4.1.1"
 
 eslint-utils@^1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.3.1.tgz#9a851ba89ee7c460346f97cf8939c7298827e512"
-  integrity sha512-Z7YjnIldX+2XMcjr7ZkgEsOj/bREONV60qYeB/bjMAqqqZ4zxKyWX+BOUkdmRmA9riiIPVvo5x86m5elviOk0Q==
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.4.3.tgz#74fec7c54d0776b6f67e0251040b5806564e981f"
+  integrity sha512-fbBN5W2xdY45KulGXmLHZ3c3FHfVYmKg0IrAKGOkT/464PQsx2UeIzfz1RmEci+KLm1bBaAzZAh8+/E+XAeZ8Q==
+  dependencies:
+    eslint-visitor-keys "^1.1.0"
 
-eslint-visitor-keys@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
-  integrity sha512-qzm/XxIbxm/FHyH341ZrbnMUpe+5Bocte9xkmFMzPMjRaZMcXww+MpBptFvtU+79L362nqiLhekCxCxDPaUMBQ==
+eslint-visitor-keys@^1.0.0, eslint-visitor-keys@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
+  integrity sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==
 
 eslint@^5.16.0:
   version "5.16.0"