init: backend

.gitignore

@@ -0,0 +1,39 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+.DS_Store
+dist
+dist-ssr
+coverage
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+*.tsbuildinfo
+
+.eslintcache
+
+# Cypress
+/cypress/videos/
+/cypress/screenshots/
+
+# Vitest
+__screenshots__/
+
+# Vite
+*.timestamp-*-*.mjs

package.json

@@ -0,0 +1,22 @@
+{
+	"type": "module",
+	"dependencies": {
+		"@elysiajs/cors": "^1.4.1",
+		"@elysiajs/node": "^1.4.5",
+		"@sinclair/typebox": "^0.34.49",
+		"axios": "^1.15.0",
+		"elysia": "^1.4.28",
+		"node": "^25.9.0",
+		"openapi-types": "^12.1.3"
+	},
+	"scripts": {
+		"dev": "tsx watch src/index.ts",
+		"build": "tsc src/index.ts --outDir dist",
+		"start": "NODE_ENV=production node dist/index.js"
+	},
+	"devDependencies": {
+		"@types/node": "^25.5.2",
+		"tsx": "^4.21.0",
+		"typescript": "^6.0.2"
+	}
+}

pnpm-lock.yaml

@@ -0,0 +1,749 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
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+        specifier: ^1.4.1
+        version: 1.4.1(elysia@1.4.28(@sinclair/typebox@0.34.49)(exact-mirror@1.0.0)(file-type@22.0.0)(openapi-types@12.1.3)(typescript@6.0.2))
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+      '@sinclair/typebox':
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+        version: 0.34.49
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+        version: 1.15.0
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+      node:
+        specifier: ^25.9.0
+        version: 25.9.0
+      openapi-types:
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+        version: 12.1.3
+    devDependencies:
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+        specifier: ^25.5.2
+        version: 25.5.2
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+        version: 4.21.0
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+      get-tsconfig: 4.13.7
+    optionalDependencies:
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src/download_cover.ts

@@ -0,0 +1,77 @@
+import axios from "axios";
+import fs from "node:fs";
+
+export async function download_image_from_caa(mbid: string) {
+  console.log("[DEBUG]: download_image_from_caa:", mbid);
+  try {
+    const response = await axios.get(
+      `http://coverartarchive.org/release/${mbid}`,
+    );
+    const img_response = await axios.get(
+      response.data.images[0].thumbnails["250"],
+      {
+        responseType: "arraybuffer",
+      },
+    );
+
+    fs.writeFileSync(`public/covers/mb/${mbid}.png`, img_response.data);
+  } catch (error) {
+    console.error("Error fetching data:", error);
+    throw error;
+  }
+}
+
+export async function itunes_cover_url(artist: string, album: string) {
+  artist = (
+    artist.toLowerCase().split(/\s+feat\.?|\s+w\s*|\s+&\s+/)[0] || artist
+  ).trim();
+
+  let query = `${artist} ${album}`
+    .replace(/\([^)]*\)/g, "")
+    .replace(/\[[^\]]*\]/g, "")
+    .replace(/[-_,"':;|]/g, " ")
+    .toLowerCase();
+
+  const apple_music_results = await fetch("https://itunes.apple.com/search", {
+    body: new URLSearchParams({
+      term: query,
+      entity: "song",
+      limit: "10",
+    }),
+    method: "POST",
+  }).then((res) => res.json());
+
+  for (let result of apple_music_results.results) {
+    if (artist == result.artistName.toLowerCase()) {
+      return result.artworkUrl100.replace("100x100bb.jpg", "200x200bb.png");
+    }
+  }
+}
+
+export async function download_image_from_itunes(
+  artist: string,
+  album: string,
+) {
+  console.log("[DEBUG]: download_image_from_itunes:", artist, album);
+  try {
+    const itunes_url = await itunes_cover_url(artist, album);
+
+    if (!itunes_url) {
+      throw new Error(`iTunes URL not found for ${artist} - ${album}`);
+    }
+
+    const artist_dir = `public/covers/itunes/${artist}`;
+    if (!fs.existsSync(artist_dir)) {
+      fs.mkdirSync(artist_dir, { recursive: true });
+    }
+
+    const img_response = await axios.get(itunes_url, {
+      responseType: "arraybuffer",
+    });
+
+    fs.writeFileSync(`${artist_dir}/${album}.png`, img_response.data);
+  } catch (error) {
+    console.error("Error fetching data:", error);
+    throw error;
+  }
+}

src/index.ts

@@ -0,0 +1,63 @@
+import { Elysia } from "elysia";
+import { cors } from "@elysiajs/cors";
+import { node } from "@elysiajs/node";
+
+import fs from "node:fs";
+
+import {
+  download_image_from_caa,
+  download_image_from_itunes,
+} from "./download_cover.js";
+
+export const app = new Elysia({ adapter: node() });
+
+app.use(cors());
+
+app.get("/", () => "snusxd-api");
+app.get("/cover/:artist/:album/:id", ({ params: { artist, album, id } }) =>
+  get_image_from_server(artist, album, id),
+);
+
+app.listen(3000, ({ hostname, port }) => {
+  console.log(`🦊 Elysia is running at ${hostname}:${port}`);
+});
+
+async function get_image_from_server(
+  artist: string,
+  album: string,
+  mbid: string,
+) {
+  const MBFilePath = `public/covers/mb/${mbid}.png`;
+  const iTunesFilePath = `public/covers/itunes/${artist}/${album}.png`;
+
+  let resultFilePath = MBFilePath;
+
+  if (fs.existsSync(MBFilePath) || fs.existsSync(iTunesFilePath)) {
+    if (fs.existsSync(MBFilePath)) resultFilePath = MBFilePath;
+    else resultFilePath = iTunesFilePath;
+    console.log("[DEBUG]: cover found on server");
+  } else {
+    try {
+      await download_image_from_itunes(artist, album);
+      resultFilePath = iTunesFilePath;
+    } catch (first_error) {
+      try {
+        await download_image_from_caa(mbid);
+        resultFilePath = MBFilePath;
+      } catch (secong_error) {
+        console.error(
+          "There's two errors while searching covers:",
+          first_error,
+          secong_error,
+        );
+        resultFilePath = "public/covers/0.png";
+      }
+    }
+  }
+
+  return new Response(fs.createReadStream(resultFilePath) as any, {
+    headers: {
+      "Content-Type": "image/png",
+    },
+  });
+}

tsconfig.json

@@ -0,0 +1,42 @@
+{
+  // Visit https://aka.ms/tsconfig to read more about this file
+  "compilerOptions": {
+    // File Layout
+    // "rootDir": "./src",
+    // "outDir": "./dist",
+    // Environment Settings
+    // See also https://aka.ms/tsconfig/module
+    "target": "esnext",
+    "types": [
+      "node"
+    ],
+    // For nodejs:
+    // "lib": ["esnext"],
+    // "types": ["node"],
+    // and npm install -D @types/node
+    // Other Outputs
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true,
+    // Stricter Typechecking Options
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+    // Style Options
+    // "noImplicitReturns": true,
+    // "noImplicitOverride": true,
+    // "noUnusedLocals": true,
+    // "noUnusedParameters": true,
+    // "noFallthroughCasesInSwitch": true,
+    // "noPropertyAccessFromIndexSignature": true,
+    // Recommended Options
+    "strict": true,
+    "jsx": "react-jsx",
+    "verbatimModuleSyntax": true,
+    "isolatedModules": true,
+    "noUncheckedSideEffectImports": true,
+    "moduleDetection": "force",
+    "skipLibCheck": true,
+    "module": "NodeNext", // or "ESNext"
+    "moduleResolution": "NodeNext", // or "Bundler"
+  }
+}