commit fd4c56a3c72177d5b7109e10526cbd2eff09fb04
Author: Lorenzo Zolfanelli <lorenzo.zolfanelli@espci.psl.eu>
Date:   Thu Oct 10 15:48:21 2024 +0200

    First commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d67ee30
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,133 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+
+uploads
\ No newline at end of file
diff --git a/app.js b/app.js
new file mode 100644
index 0000000..fbef980
--- /dev/null
+++ b/app.js
@@ -0,0 +1,162 @@
+const express = require('express');
+const http = require('http');
+const socketIo = require('socket.io');
+const multer = require('multer');
+const fs = require('fs');
+const path = require('path');
+const { OBSWebSocket } = require('obs-websocket-js');
+
+const app = express();
+const server = http.createServer(app);
+const io = socketIo(server);
+const obs = new OBSWebSocket();
+
+const OBS_HOST = 'localhost';  // If OBS is running on the same machine
+const OBS_PORT = 4455;         // Default WebSocket port
+const OBS_PASSWORD = 'jBHD5lLvKtHIjIwC';       // Add your WebSocket password here if set
+
+// Set up file storage for uploaded speeches
+const upload = multer({ dest: 'uploads/' });
+
+let speechText = [];
+let currentPosition = 0;
+
+// File to store speech lines
+const SPEECH_LINES_FILE = 'speechLines.txt';
+const SRT_FILE_NAME = 'captions.srt';
+
+// Serve static files (HTML views)
+app.use(express.static(path.join(__dirname, 'public')));
+
+// Connect to OBS WebSocket
+async function connectToOBS() {
+    try {
+        await obs.connect(`ws://${OBS_HOST}:${OBS_PORT}`, OBS_PASSWORD);
+        console.log('Connected to OBS WebSocket');
+    } catch (error) {
+        console.error('Failed to connect to OBS WebSocket:', error);
+    }
+}
+
+connectToOBS();
+
+// Load speech lines from file
+function loadSpeechLines() {
+    if (fs.existsSync(SPEECH_LINES_FILE)) {
+        const fileContents = fs.readFileSync(SPEECH_LINES_FILE, 'utf-8');
+        speechText = fileContents.split('\n').map(line => line.trim()).filter(line => line.length > 0);
+        currentPosition = 0; // Reset the position to the start
+        console.log('Loaded speech lines from file.');
+    }
+}
+
+// Load speech lines when the server starts
+loadSpeechLines();
+
+// Serve speaker view
+app.get('/speaker', (req, res) => {
+    res.sendFile(path.join(__dirname, 'public', 'speaker.html'));
+});
+
+// Serve audience/projector view
+app.get('/audience', (req, res) => {
+    res.sendFile(path.join(__dirname, 'public', 'audience.html'));
+});
+
+// Endpoint to handle file upload
+app.post('/upload', upload.single('speech'), (req, res) => {
+    const filePath = path.join(process.cwd(), req.file.path);
+    const fileContents = fs.readFileSync(filePath, 'utf-8');
+
+    speechText = fileContents.split('\n').map(line => line.trim()).filter(line => line.length > 0);
+    currentPosition = 0;
+
+    // Save the loaded speech lines to a file
+    fs.writeFileSync(SPEECH_LINES_FILE, speechText.join('\n'));
+
+    io.emit('load_speech', speechText);
+    res.send('File uploaded and speech loaded.');
+});
+
+// Handle WebSocket connections
+io.on('connection', (socket) => {
+    console.log('Client connected');
+
+    // Send the full speech to any newly connected client
+    if (speechText.length > 0) {
+        socket.emit('load_speech', speechText);
+    }
+
+    // Handle position updates from the speaker view
+    socket.on('update_position', (newPosition) => {
+        currentPosition = newPosition;
+        io.emit('update_caption', currentPosition); // Send to all clients
+
+        const currentLine = speechText[currentPosition];
+        updateOBSSubtitle(currentLine);
+        generateSRT(currentLine);
+    });
+});
+
+async function updateOBSSubtitle(captionText) {
+    try {
+        await obs.call('SendStreamCaption', {
+            captionText: captionText
+        });
+        console.log('Updated OBS Text Source:', captionText);
+    } catch (error) {
+        console.error('Error updating OBS Text Source:', error);
+    }0
+}
+
+async function generateSRT(captionText) {
+    try {
+        // Check if recording is enabled
+        const recordStatus = await obs.call('GetRecordStatus');
+        if (recordStatus && recordStatus.outputActive) {
+            // Get the recording timecode
+            const seconds = recordStatus.outputDuration / 1000; // Assuming this returns a time in seconds
+
+            // Format timecode for SRT (HH:MM:SS,ms)
+            const startTime = formatTimecode(seconds);
+            const endTime = formatTimecode(seconds + 5); // Assume each line is displayed for 5 seconds
+
+            // Create SRT entry
+            const srtEntry = `${currentPosition + 1}\n${startTime} --> ${endTime}\n${captionText}\n\n`;
+            fs.appendFileSync(SRT_FILE_NAME, srtEntry); // Append to SRT file
+            console.log('Updated SRT file:', SRT_FILE_NAME);
+        }
+    } catch (error) {
+        console.error('Error generating SRT:', error);
+    }
+}
+
+function formatTimecode(seconds) {
+    const date = new Date(0);
+    date.setSeconds(seconds);
+    const hours = String(date.getUTCHours()).padStart(2, '0');
+    const minutes = String(date.getUTCMinutes()).padStart(2, '0');
+    const secs = String(date.getUTCSeconds()).padStart(2, '0');
+    const millis = String((seconds % 1) * 1000).padStart(3, '0');
+    return `${hours}:${minutes}:${secs},${millis}`;
+}
+
+const PORT = process.env.PORT || 3000;
+server.listen(PORT, () => {
+    console.log(`Server running on port ${PORT}`);
+});
+
+const ngrok = require("@ngrok/ngrok");
+
+async function startTunnel() {
+    const listener = await ngrok.forward({
+      addr: PORT,
+      authtoken: "2nCZjA9FOMFVdHAhIDyI0Tn8y0A_5oFkSL7kXve8RcCeJMXKU",
+      domain: "explicitly-trusty-javelin.ngrok-free.app",
+      proto: "http"
+    });
+
+    console.log(`Ingress established at: ${listener.url()}`);
+}
+
+startTunnel();
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..75dc0d3
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1554 @@
+{
+  "name": "speechsub",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "speechsub",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "@ngrok/ngrok": "^1.4.1",
+        "express": "^4.21.0",
+        "multer": "^1.4.5-lts.1",
+        "obs-websocket-js": "^5.0.6",
+        "socket.io": "^4.8.0"
+      },
+      "bin": {
+        "speechsub": "app.js"
+      }
+    },
+    "node_modules/@msgpack/msgpack": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/@msgpack/msgpack/-/msgpack-2.8.0.tgz",
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+      "engines": {
+        "node": ">= 10"
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diff --git a/package.json b/package.json
new file mode 100644
index 0000000..663db84
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "speechsub",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "bin": "app.js",
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "@ngrok/ngrok": "^1.4.1",
+    "express": "^4.21.0",
+    "multer": "^1.4.5-lts.1",
+    "obs-websocket-js": "^5.0.6",
+    "socket.io": "^4.8.0"
+  },
+  "pkg": {
+    "assets": "public/*",
+    "outputPath": "dist"
+  }
+}
diff --git a/public/audience.html b/public/audience.html
new file mode 100644
index 0000000..ecf096e
--- /dev/null
+++ b/public/audience.html
@@ -0,0 +1,106 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Projector View</title>
+    <style>
+        body {
+            font-family: Futura, sans-serif;
+            font-size: 32px;
+            background-color: green;
+            color: white;
+            text-align: center; /* Align text to the left */
+            margin: 0;
+            padding: 0;
+            -webkit-text-fill-color: white;
+            -webkit-text-stroke-color: black;
+            -webkit-text-stroke-width: 6.00px; 
+            paint-order: stroke fill;
+        }
+
+        #container {
+            overflow: hidden;
+            height: 200px; /* Ensure container is tall enough for 4 lines */
+            max-width: 42ch; 
+            position: relative;
+            padding-left: 20px; /* Add some padding to the left */
+            margin-left: auto;
+            margin-right: auto;
+        }
+
+        #content {
+            position: absolute;
+            top: 0;
+            transition: top 0.5s ease; /* Smooth scrolling */
+        }
+
+        .line {
+            opacity: 1;
+            white-space: normal; /* Allow lines to wrap */
+            word-wrap: break-word; /* Break long words if needed */
+            margin: 5px 0;
+            }
+
+        .currentLine {
+            font-weight: bold;
+            opacity: 1;
+        }
+
+        /* Ensure there's space for 4 lines to be displayed */
+        #container {
+            max-height: 400px;
+        }
+    </style>
+</head>
+<body>
+    <div id="container">
+        <div id="content"></div>
+    </div>
+
+    <script src="/socket.io/socket.io.js"></script>
+    <script>
+        const socket = io();
+        const contentElement = document.getElementById('content');
+        let speechLines = [];
+        let currentLineIndex = 0;
+
+        // Display 4 lines (previous, current, next, and an extra one above the current line)
+        function updateDisplay() {
+            contentElement.innerHTML = ''; // Clear previous lines
+
+            const start = Math.max(0, currentLineIndex - 2); // Show 2 lines before current
+            const end = Math.min(speechLines.length, currentLineIndex + 2); // Show 2 lines after current
+
+            // Create a new block of lines
+            const displayLines = speechLines.slice(start, end).map((line, index) => {
+                const div = document.createElement('div');
+                div.classList.add('line');
+                if (index === 2) div.classList.add('currentLine'); // Highlight the current line
+                div.textContent = line;
+                return div;
+            });
+
+            displayLines.forEach(div => contentElement.appendChild(div));
+
+            // Scroll animation based on the height of each line
+            const lineHeight = document.querySelector('.line').offsetHeight;
+            const previousLinesHeight = (currentLineIndex - start - 1) * lineHeight; // Offset for lines above the current line
+            contentElement.style.top = `-${previousLinesHeight}px`;
+        }
+
+        // Receive updates from the server
+        socket.on('update_caption', (newPosition) => {
+            currentLineIndex = newPosition;
+            updateDisplay();
+        });
+
+        // Load the speech when a new client connects
+        socket.on('load_speech', (lines) => {
+            speechLines = lines;
+            currentLineIndex = 0;
+            updateDisplay(); // Display the initial lines
+        });
+    </script>
+</body>
+</html>
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..2ddd196
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Upload Speech</title>
+</head>
+<body>
+    <h1>Upload Speech File</h1>
+    <form action="/upload" method="POST" enctype="multipart/form-data">
+        <input type="file" name="speech" accept=".txt">
+        <button type="submit">Upload</button>
+    </form>
+</body>
+</html>
\ No newline at end of file
diff --git a/public/speaker.html b/public/speaker.html
new file mode 100644
index 0000000..d9a645d
--- /dev/null
+++ b/public/speaker.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Speaker View</title>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            padding: 20px;
+            background-color: white;
+        }
+
+        .line {
+            font-size: 20px;
+            margin: 5px 0;
+        }
+
+        .currentLine {
+            background-color: yellow;
+        }
+    </style>
+</head>
+<body>
+    <h1>Speaker View</h1>
+    <div id="speech"></div>
+
+    <script src="/socket.io/socket.io.js"></script>
+    <script>
+        const socket = io();
+        const speechDiv = document.getElementById('speech');
+        let speechLines = [];
+        let currentLineIndex = 0;
+
+        // Render the speech and highlight the current line
+        function renderSpeech() {
+            speechDiv.innerHTML = '';
+            speechLines.forEach((line, index) => {
+                const div = document.createElement('div');
+                div.classList.add('line');
+                if (index === currentLineIndex) {
+                    div.classList.add('currentLine');
+                }
+                div.textContent = line;
+                div.onclick = () => updatePosition(index); // Allow clicking to select a line
+                speechDiv.appendChild(div);
+            });
+        }
+
+        // Send updated position to the server
+        function updatePosition(newPosition) {
+            currentLineIndex = newPosition;
+            socket.emit('update_position', currentLineIndex);
+            renderSpeech();
+        }
+
+        // Listen for speech text and load it
+        socket.on('load_speech', (lines) => {
+            speechLines = lines;
+            currentLineIndex = 0;
+            renderSpeech();
+        });
+
+        // Add keyboard navigation
+        document.addEventListener('keydown', (event) => {
+            if (event.key === 'ArrowDown' && currentLineIndex < speechLines.length - 1) {
+                updatePosition(currentLineIndex + 1);
+            } else if (event.key === 'ArrowUp' && currentLineIndex > 0) {
+                updatePosition(currentLineIndex - 1);
+            }
+        });
+    </script>
+</body>
+</html>