Added base64 encoding for image content

src/services/ImageService.ts

@@ -21,12 +21,20 @@ class ImageService {
         const botResponse = await BotApiService.getAll();
         const imagesUrls = botResponse.images.map(image => image.url);
 
-        const validPosts = posts
+        const validPosts = Promise.all(posts
             .filter(post => !imagesUrls.some(url => url === post.url))
-            .map(post => ({ url: post.url, tags: post.tags, content: "TODO" }));
+            .map(async (post): Promise<Image> => {
+                const encodedImage = await this.imageUrlToBase64(post.url);
+                return { url: post.url, tags: post.tags, content: encodedImage };
+            }));
         
         return validPosts;
     }
+
+    private async imageUrlToBase64(url: string): Promise<string> {
+        const data = await (await fetch(url)).text();
+        return Buffer.from(data, "base64").toString("binary");
+    }
 }
 
 export default new ImageService();

test/ImageService.test.ts

@@ -1,4 +1,4 @@
-import { describe, expect, it, mock } from "bun:test";
+import { describe, expect, it, mock, spyOn } from "bun:test";
 import Image from "../src/types/Image";
 import ImageService from "../src/services/ImageService";
 import GelbooruApiResponse from "../src/types/GelbooruServiceResponse";
@@ -6,8 +6,8 @@ import { BotApiResponse } from "../src/types/BotApiResponse";
 
 describe("endpoint gets a non repeated image", () => {
     it("should return an image that is not in the response of the /images endpoint of the bot API", async () => {
-        const REPEATED_URL = "image.com/1";
-        const UNIQUE_URL = "image.com/2";
+        const REPEATED_URL = "https://fastly.picsum.photos/id/1/10/20.jpg?hmac=gY6PvUXFacKfYpBpTTVcNLxumpyMmoCamM-J5DOPwNc";
+        const UNIQUE_URL = "https://fastly.picsum.photos/id/2/10/20.jpg?hmac=zy6lz21CuRIstr9ETx9h5AuoH50s_L2uIEct3dROpY8";
 
         mock.module("../src/services/GelbooruApiService", () => {
             let alreadyCalled = false;
@@ -35,7 +35,10 @@ describe("endpoint gets a non repeated image", () => {
             }
         }));
 
+        const imageUrlToBase64Spy = spyOn(ImageService as any, 'imageUrlToBase64');
+
         const image: Image = await ImageService.get();
         expect(image.url).not.toBe(REPEATED_URL);
-    })
+        expect(imageUrlToBase64Spy).toHaveBeenCalledTimes(1);
+    });
 })