basic navidrome implementation

src/navidrome.ts

@@ -0,0 +1,91 @@
+import { Md5 } from "ts-md5/dist/md5";
+import { Credentials, MusicService } from "./music_service";
+import X2JS from "x2js";
+
+import axios from "axios";
+import { Encryption } from "./encryption";
+import randomString from "./random_string";
+
+export const t = (password: string, s: string) =>
+  Md5.hashStr(`${password}${s}`);
+
+export type SubconicEnvelope = {
+  "subsonic-response": SubsonicResponse;
+};
+
+export type SubsonicResponse = {
+  _status: string;
+};
+
+export type SubsonicError = SubsonicResponse & {
+  error: {
+    _code: string;
+    _message: string;
+  };
+};
+
+export function isError(
+  subsonicResponse: SubsonicResponse
+): subsonicResponse is SubsonicError {
+  return (subsonicResponse as SubsonicError).error !== undefined;
+}
+
+export class Navidrome implements MusicService {
+  url: string;
+  encryption: Encryption;
+
+  constructor(url: string, encryption: Encryption) {
+    this.url = url;
+    this.encryption = encryption;
+  }
+
+  generateToken = async ({ username, password }: Credentials) => {
+    const s = randomString();
+    return axios
+      .get(
+        `${this.url}/rest/ping.view?u=${username}&t=${t(
+          password,
+          s
+        )}&s=${s}&v=1.16.1.0&c=bonob`
+      )
+      .then((response) => new X2JS().xml2js(response.data) as SubconicEnvelope)
+      .then((json) => json["subsonic-response"])
+      .then((json) => {
+        if (isError(json)) throw json.error._message;
+        else return json;
+      })
+      .then((_) => {
+        return {
+          authToken: Buffer.from(
+            JSON.stringify(
+              this.encryption.encrypt(JSON.stringify({ username, password }))
+            )
+          ).toString("base64"),
+          userId: username,
+          nickname: username,
+        };
+      });
+  };
+
+  parseToken = (token: string): Credentials =>
+    JSON.parse(
+      this.encryption.decrypt(
+        JSON.parse(Buffer.from(token, "base64").toString("ascii"))
+      )
+    );
+
+  async login(_: string) {
+    // const credentials: Credentials = this.parseToken(token);
+    return Promise.resolve({
+      artists: () => [],
+      artist: (id: string) => ({
+        id,
+        name: id,
+      }),
+      albums: ({ artistId }: { artistId?: string }) => {
+        console.log(artistId);
+        return [];
+      },
+    });
+  }
+}