Add a fp library and finish the repository implementation

package.json

@@ -16,6 +16,7 @@
   },
   "dependencies": {
     "expo": "^30.0.1",
+    "fp-ts": "^1.9.0",
     "react": "16.3.1",
     "react-native": "https://github.com/expo/react-native/archive/sdk-30.0.0.tar.gz",
     "react-navigation": "^2.18.0",

src/core/super-heroes-repository.ts

@@ -1,3 +1,4 @@
+import { fromNullable, Option } from "fp-ts/lib/Option";
 import { SuperHero } from "./model";
 
 const superHeroes: SuperHero[] = [
@@ -102,12 +103,15 @@ const superHeroes: SuperHero[] = [
 
 export function getSuperHeroes(): Promise<SuperHero[]> {
     return new Promise<SuperHero[]>((resolve) => {
-        resolve(superHeroes);
+        setTimeout(() => resolve(superHeroes), 1500);
     });
 }
 
-export function getSuperHeroById(id: string): Promise<SuperHero> {
-    return new Promise<SuperHero>((resolve) => {
-        superHeroes.filter((superHero) => superHero.name === id);
+export function getSuperHeroById(id: string): Promise<Option<SuperHero>> {
+    return new Promise<Option<SuperHero>>((resolve) => {
+        setTimeout(() => {
+            const superHero = superHeroes.find((sh) => sh.name === id);
+            resolve(fromNullable(superHero));
+        }, 1500);
     });
 }

yarn.lock

@@ -2698,6 +2698,10 @@ form-data@~2.3.2:
     combined-stream "^1.0.6"
     mime-types "^2.1.12"
 
+fp-ts@^1.9.0:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/fp-ts/-/fp-ts-1.9.0.tgz#52acf85692025b34285ff4014f39af72d1107e0b"
+
 fragment-cache@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/fragment-cache/-/fragment-cache-0.2.1.tgz#4290fad27f13e89be7f33799c6bc5a0abfff0d19"