Hacky, but working spotify skipping.

package-lock.json

@@ -13,6 +13,7 @@
         "express": "^4.18.2",
         "nanoid": "^3.3.6",
         "pkg": "^5.8.1",
+        "spotify-web-api-node": "^5.0.2",
         "yargs": "^17.7.2"
       },
       "bin": {
@@ -434,6 +435,11 @@
         "node": ">=8"
       }
     },
+    "node_modules/asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="
+    },
     "node_modules/at-least-node": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
@@ -648,6 +654,22 @@
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       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
     },
+    "node_modules/combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "dependencies": {
+        "delayed-stream": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/component-emitter": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+      "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -699,6 +721,11 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
     },
+    "node_modules/cookiejar": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.4.tgz",
+      "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw=="
+    },
     "node_modules/core-util-is": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
@@ -755,6 +782,14 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/delayed-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -955,6 +990,11 @@
         "node": ">=8.6.0"
       }
     },
+    "node_modules/fast-safe-stringify": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz",
+      "integrity": "sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA=="
+    },
     "node_modules/fastq": {
       "version": "1.15.0",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.15.0.tgz",
@@ -1018,6 +1058,28 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
+    "node_modules/form-data": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.1.tgz",
+      "integrity": "sha512-RHkBKtLWUVwd7SqRIvCZMEvAMoGUp0XU+seQiZejj0COz3RI3hWP4sCv3gZWWLjJTd7rGwcsF5eKZGii0r/hbg==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/formidable": {
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/formidable/-/formidable-1.2.6.tgz",
+      "integrity": "sha512-KcpbcpuLNOwrEjnbpMC0gS+X8ciDoZE1kkqzat4a8vrprf+s9pKNQ/QIwWfbfs4ltgmFl3MD177SNTkve3BwGQ==",
+      "deprecated": "Please upgrade to latest, formidable@v2 or formidable@v3! Check these notes: https://bit.ly/2ZEqIau",
+      "funding": {
+        "url": "https://ko-fi.com/tunnckoCore/commissions"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -2143,6 +2205,14 @@
         "node": ">=8"
       }
     },
+    "node_modules/spotify-web-api-node": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/spotify-web-api-node/-/spotify-web-api-node-5.0.2.tgz",
+      "integrity": "sha512-r82dRWU9PMimHvHEzL0DwEJrzFk+SMCVfq249SLt3I7EFez7R+jeoKQd+M1//QcnjqlXPs2am4DFsGk8/GCsrA==",
+      "dependencies": {
+        "superagent": "^6.1.0"
+      }
+    },
     "node_modules/statuses": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
@@ -2199,6 +2269,52 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/superagent": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/superagent/-/superagent-6.1.0.tgz",
+      "integrity": "sha512-OUDHEssirmplo3F+1HWKUrUjvnQuA+nZI6i/JJBdXb5eq9IyEQwPyPpqND+SSsxf6TygpBEkUjISVRN4/VOpeg==",
+      "deprecated": "Please upgrade to v7.0.2+ of superagent.  We have fixed numerous issues with streams, form-data, attach(), filesystem errors not bubbling up (ENOENT on attach()), and all tests are now passing.  See the releases tab for more information at <https://github.com/visionmedia/superagent/releases>.",
+      "dependencies": {
+        "component-emitter": "^1.3.0",
+        "cookiejar": "^2.1.2",
+        "debug": "^4.1.1",
+        "fast-safe-stringify": "^2.0.7",
+        "form-data": "^3.0.0",
+        "formidable": "^1.2.2",
+        "methods": "^1.1.2",
+        "mime": "^2.4.6",
+        "qs": "^6.9.4",
+        "readable-stream": "^3.6.0",
+        "semver": "^7.3.2"
+      },
+      "engines": {
+        "node": ">= 7.0.0"
+      }
+    },
+    "node_modules/superagent/node_modules/mime": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/mime/-/mime-2.6.0.tgz",
+      "integrity": "sha512-USPkMeET31rOMiarsBNIHZKLGgvKc/LrjofAnBlOttf5ajRvqiRA8QsenbcooctK6d6Ts6aqZXBA+XbkKthiQg==",
+      "bin": {
+        "mime": "cli.js"
+      },
+      "engines": {
+        "node": ">=4.0.0"
+      }
+    },
+    "node_modules/superagent/node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",

package.json

@@ -23,6 +23,7 @@
     "express": "^4.18.2",
     "nanoid": "^3.3.6",
     "pkg": "^5.8.1",
+    "spotify-web-api-node": "^5.0.2",
     "yargs": "^17.7.2"
   },
   "devDependencies": {

src/commands/authenticate.js

@@ -3,31 +3,36 @@ const {input} = require("@inquirer/prompts");
 const querystring = require("querystring");
 const {nanoid} = require("nanoid");
 const express = require('express')
-const {setAuth, hasAuth, authFile} = require("../utilities/authentication");
+const {spotify, spotifyCredentialsFile, hasSpotifyCredentials, saveSpotifyCredentials} = require("../utilities/spotify");
 
 exports.command = 'authenticate'
 exports.description = 'starts the Spotity authentication process'
-exports.builder = function (argv) {
+exports.builder = (argv) => argv
-    return argv.option('client-id')
+    .option('client-id', {
-}
+        description: 'The Spotify app client id',
-;
+        type: 'string'
+    })
+    .option('client-secret', {
+        description: 'The Spotify app client secret',
+        type: 'string'
+    })
 exports.handler = async function (argv) {
-    if (hasAuth()) {
+    if (hasSpotifyCredentials()) {
-        console.log(`spotify.local is already authenticated, remove "${authFile}" is you want to log out.`);
+        console.log(`spotify.local is already authenticated, remove "${spotifyCredentialsFile}" is you want to log out.`);
         return;
     }
 
     const port = await findAvailablePort();
 
     const authenticateRoute = 'authenticate';
-    const authenticateUrl = `http://localhost:${port}/${authenticateRoute}`;
+    const redirectUri = `http://localhost:${port}/${authenticateRoute}`;
 
     const tutorial = [
         'Visit https://developer.spotify.com/dashboard and click "Create app"',
         'Set the "App name" as "spotify.local"',
         'Set the "App description" as "My spotify.local"',
         'Set the "Website" as "https://code.tmp.dev/ian/spotify.local"',
-        `Set the "Redirect URI" as "${authenticateUrl}"`,
+        `Set the "Redirect URI" as "${redirectUri}"`,
         'Select under "Which API/SDKs are you planning to use?" the "Web API"',
         'Sign your life away by agreeing with the "Developer Terms of Service and Design Guidelines"',
         'Click on the "Save" button',
@@ -36,12 +41,18 @@ exports.handler = async function (argv) {
 
     tutorial.forEach((string, index) => console.log(`${index+1} ${string}`));
 
-    const clientId = argv.clientId ?? await input({ message: `${tutorial.length}. Paste the clientId here` })
+    const clientId = argv.clientId ?? await input({ message: `${tutorial.length}. Paste the client id here` })
+    const clientSecret = argv.clientSecret ?? await input({ message: `${tutorial.length}. Paste the client secret here` })
     const originalState = nanoid();
-    const redirectUrl = new URL('https://accounts.spotify.com/authorize');
+
-    redirectUrl.search = querystring.stringify({
+    spotify.setClientId(clientId);
+    spotify.setClientSecret(clientSecret);
+    spotify.setRedirectURI(redirectUri);
+
+    const authUrl = new URL('https://accounts.spotify.com/authorize');
+    authUrl.search = querystring.stringify({
         response_type: 'code',
-        client_id: clientId,
+        client_id: spotify.getClientId(),
         scope: [
             'user-library-read',
             'user-read-private',
@@ -59,28 +70,35 @@ exports.handler = async function (argv) {
             'user-read-currently-playing',
             'user-read-playback-position'
         ].join(' '),
-        redirect_uri: authenticateUrl,
+        redirect_uri: spotify.getRedirectURI(),
         state:  originalState
     });
 
     const app = express();
 
     let server;
-    app.get(`/${authenticateRoute}`, (req, res) => {
+    app.get(`/${authenticateRoute}`, async (req, res) => {
-        const {state, code} = req.query;
+        const {state, code, error = null} = req.query;
-        if (originalState === state) {
+        if (!error && originalState === state) {
-            setAuth(code);
+            const { body } = await spotify.authorizationCodeGrant(code)
+            const {access_token, refresh_token, expires_in} = body;
+            spotify.setExpired((new Date).getTime() + expires_in);
+            spotify.setAccessToken(access_token);
+            spotify.setRefreshToken(refresh_token);
+            saveSpotifyCredentials();
 
             res.send('<script>(() => close())()</script>');
 
             server?.close();
 
             console.log(`${tutorial.length+2}. Spotify.local has been authenticated`);
-        } else {
+
-            res.status(400);
+            return;
-            res.send('NO')
         }
+
+        res.status(400);
+        res.send('NO');
     });
 
-    server = app.listen(port, () => console.log(`${tutorial.length+1}. Follow the following URL to authenticate: ${redirectUrl}`));
+    server = app.listen(port, () => console.log(`${tutorial.length+1}. Follow the following URL to authenticate: ${authUrl}`));
 }

src/commands/next.js

@@ -0,0 +1,8 @@
+const { spotify} = require('../utilities/spotify')
+
+exports.command = 'next'
+exports.handler = async () => {
+    spotify.ensure()
+        .then(spotify => spotify.skipToNext())
+        .catch(e => console.error(e.message))
+};

src/utilities/authentication.js

@@ -1,16 +0,0 @@
-const { existsSync, mkdirSync, writeFileSync, readFileSync } = require('fs');
-const { homedir } = require('os');
-
-const configDir = `${homedir()}/.spotify-local`
-const authenticationFile = `${configDir}/authentication`
-
-const ensure = () => {
-    if (!existsSync(configDir)) mkdirSync(configDir);
-    if (!existsSync(authenticationFile)) writeFileSync(authenticationFile, '');
-    return true;
-};
-
-exports.authFile = authenticationFile;
-exports.setAuth = (code) => ensure() && writeFileSync(authenticationFile, code);
-exports.getAuth = () => ensure() && readFileSync(authenticationFile).toString();
-exports.hasAuth = () => ensure() && readFileSync(authenticationFile).toString() !== '';

src/utilities/spotify.js

@@ -0,0 +1,56 @@
+const SpotifyWebApi = require('spotify-web-api-node');
+const {homedir} = require("os");
+const {existsSync, mkdirSync, writeFileSync, readFileSync} = require("fs");
+
+const configDir = `${homedir()}/.spotify-local`
+const spotifyCredentialsFile = `${configDir}/credentials.json`
+
+const ensure = () => {
+    if (!existsSync(configDir)) mkdirSync(configDir);
+    if (!existsSync(spotifyCredentialsFile)) writeFileSync(spotifyCredentialsFile, '{}');
+    return true;
+};
+
+SpotifyWebApi.prototype.setExpired = function (expiresIn) {
+    const expired = (new Date).getTime() + expiresIn;
+
+    this._setCredential('expired', expired);
+}
+
+SpotifyWebApi.prototype.getExpired = function () {
+    return this._getCredential('expired') ?? 0;
+}
+
+/**
+ * @returns {Promise<SpotifyWebApi>}
+ */
+SpotifyWebApi.prototype.ensure = async function () {
+    const timeExpired = this.getExpired();
+    const time = (new Date).getTime();
+    if (time > timeExpired) {
+        const { body } = await this.refreshAccessToken();
+        const { access_token, expires_in } = body;
+        this.setAccessToken(access_token);
+        this.setExpired((new Date).getTime() + expires_in);
+        saveSpotifyCredentials();
+    }
+
+    return this;
+}
+
+const spotify = new SpotifyWebApi();
+
+const saveSpotifyCredentials = () => ensure() && writeFileSync(spotifyCredentialsFile, JSON.stringify(spotify.getCredentials()));
+const restoreSpotifyCredentials = () => ensure() && spotify.setCredentials(JSON.parse(readFileSync(spotifyCredentialsFile).toString()));
+const hasSpotifyCredentials = () => existsSync(spotifyCredentialsFile);
+
+if (existsSync(spotifyCredentialsFile)) restoreSpotifyCredentials();
+
+
+module.exports = {
+    spotify,
+    spotifyCredentialsFile,
+    saveSpotifyCredentials,
+    restoreSpotifyCredentials,
+    hasSpotifyCredentials,
+}