From 91bc10c3955d5ad937ec27c5cad3065555a1287f Mon Sep 17 00:00:00 2001 From: James Magahern Date: Sat, 15 Feb 2025 00:37:32 -0800 Subject: [PATCH] initial commit --- .gitignore | 3 + package.json | 24 +++++++ src/MediaPlayer.ts | 169 +++++++++++++++++++++++++++++++++++++++++++++ src/server.ts | 93 +++++++++++++++++++++++++ tsconfig.json | 109 +++++++++++++++++++++++++++++ 5 files changed, 398 insertions(+) create mode 100644 .gitignore create mode 100644 package.json create mode 100644 src/MediaPlayer.ts create mode 100644 src/server.ts create mode 100644 tsconfig.json diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b8ffe08 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +node_modules/ +package-lock.json + diff --git a/package.json b/package.json new file mode 100644 index 0000000..0d9230b --- /dev/null +++ b/package.json @@ -0,0 +1,24 @@ +{ + "name": "mpvqueue", + "version": "1.0.0", + "main": "build/server.js", + "scripts": { + "build": "tsc", + "start": "tsc && node build/server.js" + }, + "author": "", + "license": "ISC", + "description": "", + "devDependencies": { + "@types/express": "^5.0.0", + "@types/express-ws": "^3.0.5", + "@types/node": "^22.13.4", + "@types/ws": "^8.5.14", + "typescript": "^5.7.3" + }, + "dependencies": { + "express": "^4.21.2", + "express-ws": "^5.0.2", + "ws": "^8.18.0" + } +} diff --git a/src/MediaPlayer.ts b/src/MediaPlayer.ts new file mode 100644 index 0000000..ff14ad1 --- /dev/null +++ b/src/MediaPlayer.ts @@ -0,0 +1,169 @@ +import { ChildProcess, spawn } from "child_process"; +import { Socket } from "net"; +import { WebSocket } from "ws"; + +interface PendingCommand { + resolve: (value: any) => void; + reject: (reason: any) => void; +} + +export class MediaPlayer { + private playerProcess: ChildProcess; + private socket: Socket; + private eventSubscribers: WebSocket[] = []; + + private pendingCommands: Map = new Map(); + private requestId: number = 1; + private dataBuffer: string = ''; + + constructor() { + console.log("Starting player process"); + this.playerProcess = spawn("mpv", [ + "--no-video", + "--no-terminal", + "--idle=yes", + "--input-ipc-server=/tmp/mpv-socket" + ]); + + this.socket = new Socket(); + + this.playerProcess.on("spawn", () => { + console.log("Player process spawned, opening socket"); + setTimeout(() => { + this.connectToSocket(); + }, 200); + }); + } + + public async getPlaylist(): Promise { + return this.writeCommand("get_property", ["playlist"]) + .then((response) => { + return response.data; + }); + } + + public async getNowPlaying(): Promise { + return this.writeCommand("get_property", ["media-title"]) + .then((response) => { + return response.data; + }); + } + + public async getPauseState(): Promise { + return this.writeCommand("get_property", ["pause"]) + .then((response) => { + return response.data; + }); + } + + public async getVolume(): Promise { + return this.writeCommand("get_property", ["volume"]) + .then((response) => { + return response.data; + }); + } + + public async setVolume(volume: number) { + return this.writeCommand("set_property", ["volume", volume]); + } + + public async getIdle(): Promise { + return this.writeCommand("get_property", ["idle"]) + .then((response) => { + return response.data; + }); + } + + public async append(url: string) { + return this.writeCommand("loadfile", [url, "append-play"]); + } + + public async play() { + return this.writeCommand("set_property", ["pause", false]); + } + + public async pause() { + return this.writeCommand("set_property", ["pause", true]); + } + + public async deletePlaylistItem(index: number) { + return this.writeCommand("playlist-remove", [index]); + } + + public subscribe(ws: WebSocket) { + this.eventSubscribers.push(ws); + } + + public unsubscribe(ws: WebSocket) { + this.eventSubscribers = this.eventSubscribers.filter(subscriber => subscriber !== ws); + } + + private async writeCommand(command: string, args: any[]): Promise { + return new Promise((resolve, reject) => { + const id = this.requestId++; + + const commandObject = JSON.stringify({ + command: [command, ...args], + request_id: id + }); + + this.pendingCommands.set(id, { resolve, reject }); + this.socket.write(commandObject + '\n'); + + // Add timeout to prevent hanging promises + setTimeout(() => { + if (this.pendingCommands.has(id)) { + const pending = this.pendingCommands.get(id); + if (pending) { + pending.reject(new Error('Command timed out')); + this.pendingCommands.delete(id); + } + } + }, 5000); + }); + } + + private connectToSocket() { + this.socket.connect("/tmp/mpv-socket"); + this.socket.on("data", data => this.receiveData(data.toString())); + } + + private handleEvent(event: string, data: any) { + console.log("Event [" + event + "]: " + JSON.stringify(data, null, 2)); + + // Notify all subscribers + this.eventSubscribers.forEach(subscriber => { + subscriber.send(JSON.stringify({ event, data })); + }); + } + + private receiveData(data: string) { + this.dataBuffer += data; + + const lines = this.dataBuffer.split('\n'); + + // Keep last incomplete line in the buffer + this.dataBuffer = lines.pop() || ''; + + for (const line of lines) { + if (line.trim().length > 0) { + try { + const response = JSON.parse(line); + if (response.request_id) { + const pending = this.pendingCommands.get(response.request_id); + if (pending) { + pending.resolve(response); + this.pendingCommands.delete(response.request_id); + } + } else if (response.event) { + this.handleEvent(response.event, response.data); + } else { + console.log(response); + } + } catch (error) { + console.error('Error parsing JSON:', error); + } + } + } + } +} \ No newline at end of file diff --git a/src/server.ts b/src/server.ts new file mode 100644 index 0000000..d8d56a3 --- /dev/null +++ b/src/server.ts @@ -0,0 +1,93 @@ +import express from "express"; +import expressWs from "express-ws"; +import { MediaPlayer } from "./MediaPlayer"; + +interface PlaylistAppendRequest { + url: string; +} + +const app = express(); +expressWs(app); +app.use(express.json()); + +const router = express.Router(); + +const mediaPlayer = new MediaPlayer(); + +router.get("/playlist", async (req, res) => { + const playlist = await mediaPlayer.getPlaylist(); + res.send(playlist); +}); + +router.post("/playlist", async (req, res) => { + try { + const { url } = req.body as PlaylistAppendRequest; + await mediaPlayer.append(url); + res.send(JSON.stringify({ success: true })); + } catch (error: any) { + res.status(500) + .send(JSON.stringify({ success: false, error: error.message })); + } +}); + +router.delete("/playlist/:index", async (req, res) => { + const { index } = req.params as { index: string }; + await mediaPlayer.deletePlaylistItem(parseInt(index)); + res.send(JSON.stringify({ success: true })); +}); + +router.post("/play", async (req, res) => { + try { + await mediaPlayer.play(); + res.send(JSON.stringify({ success: true })); + } catch (error: any) { + res.status(500) + .send(JSON.stringify({ success: false, error: error.message })); + } +}); + +router.post("/pause", async (req, res) => { + try { + await mediaPlayer.pause(); + res.send(JSON.stringify({ success: true })); + } catch (error: any) { + res.status(500) + .send(JSON.stringify({ success: false, error: error.message })); + } +}); + +router.get("/nowplaying", async (req, res) => { + const nowPlaying = await mediaPlayer.getNowPlaying(); + const pauseState = await mediaPlayer.getPauseState(); + const volume = await mediaPlayer.getVolume(); + const idle = await mediaPlayer.getIdle(); + + res.send(JSON.stringify({ + success: true, + nowPlaying: nowPlaying, + isPaused: pauseState, + volume: volume, + isIdle: idle + })); +}); + +router.post("/volume", async (req, res) => { + const { volume } = req.body as { volume: number }; + await mediaPlayer.setVolume(volume); + res.send(JSON.stringify({ success: true })); +}); + +router.ws("/events", (ws, req) => { + console.log(req.query); + mediaPlayer.subscribe(ws); + + ws.on("close", () => { + mediaPlayer.unsubscribe(ws); + }); +}); + +app.use("/", router); + +app.listen(3000, () => { + console.log("Server is running on port 3000"); +}); \ No newline at end of file diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..83a69c7 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,109 @@ +{ + "compilerOptions": { + /* Visit https://aka.ms/tsconfig to read more about this file */ + + /* Projects */ + // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ + // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ + // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ + // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ + // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ + // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ + + /* Language and Environment */ + "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ + // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ + // "jsx": "preserve", /* Specify what JSX code is generated. */ + // "experimentalDecorators": true, /* Enable experimental support for legacy experimental decorators. */ + // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ + // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ + // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ + // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ + // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ + // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ + // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ + // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ + + /* Modules */ + "module": "commonjs", /* Specify what module code is generated. */ + "rootDir": "./src", /* Specify the root folder within your source files. */ + // "moduleResolution": "node10", /* Specify how TypeScript looks up a file from a given module specifier. */ + // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ + // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ + // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ + // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ + // "types": [], /* Specify type package names to be included without being referenced in a source file. */ + // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ + // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ + // "allowImportingTsExtensions": true, /* Allow imports to include TypeScript file extensions. Requires '--moduleResolution bundler' and either '--noEmit' or '--emitDeclarationOnly' to be set. */ + // "resolvePackageJsonExports": true, /* Use the package.json 'exports' field when resolving package imports. */ + // "resolvePackageJsonImports": true, /* Use the package.json 'imports' field when resolving imports. */ + // "customConditions": [], /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */ + // "resolveJsonModule": true, /* Enable importing .json files. */ + // "allowArbitraryExtensions": true, /* Enable importing files with any extension, provided a declaration file is present. */ + // "noResolve": true, /* Disallow 'import's, 'require's or ''s from expanding the number of files TypeScript should add to a project. */ + + /* JavaScript Support */ + // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ + // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ + // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ + + /* Emit */ + // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ + // "declarationMap": true, /* Create sourcemaps for d.ts files. */ + // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ + // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ + // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ + // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ + "outDir": "./build", /* Specify an output folder for all emitted files. */ + // "removeComments": true, /* Disable emitting comments. */ + // "noEmit": true, /* Disable emitting files from a compilation. */ + // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ + // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ + // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ + // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ + // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ + // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ + // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ + // "newLine": "crlf", /* Set the newline character for emitting files. */ + // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ + // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ + // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ + // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ + // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ + // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ + + /* Interop Constraints */ + // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ + // "verbatimModuleSyntax": true, /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */ + // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ + "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ + // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ + "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ + + /* Type Checking */ + "strict": true, /* Enable all strict type-checking options. */ + // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ + // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ + // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ + // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ + // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ + // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ + // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ + // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ + // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ + // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ + // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ + // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ + // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ + // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ + // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ + // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ + // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ + // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ + + /* Completeness */ + // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ + "skipLibCheck": true /* Skip type checking all .d.ts files. */ + } +}