X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=index.js;h=55e17982786b27ad39ce47568dfe13cf18a39e02;hb=3fb2bec10ed7b64ae2455abde1febce6156d854e;hp=19035310d08d207618ebff39e06b2f0a3e4000ce;hpb=e0b2d89a75bbe68baf6a0d2eb05e3bb7e2e7c242;p=zombocom-ai

diff --git a/index.js b/index.js
index 1903531..55e1798 100644
--- a/index.js
+++ b/index.js
@@ -1,14 +1,135 @@
+const fs = require('fs');
+
+const util = require('util');
+const execFile = util.promisify(require('child_process').execFile);
+
 const express = require('express');
 const app = express();
+const session = require('express-session');
+const FileStore = require('session-file-store')(session);
 const http = require('http');
 const server = http.createServer(app);
+const { Server } = require("socket.io");
+const io = new Server(server);
 const port = 2122;
 
-app.get('/', (req, res) => {
+const python_path = '/usr/bin/python3'
+const generate_image_script = '/home/cworth/src/zombocom-ai/generate-image.py'
+const state_file = 'zombocom-state.json'
+
+var state;
+
+if (!process.env.ZOMBOCOM_SESSION_SECRET) {
+    console.log("Error: Environment variable ZOMBOCOM_SESSION_SECRET not set.");
+    console.log("Please set it to a random, but persistent, value.")
+    process.exit();
+}
+
+const session_middleware =  session(
+    {store: new FileStore,
+     secret: process.env.ZOMBOCOM_SESSION_SECRET,
+     resave: false,
+     saveUninitialized: true
+    });
+
+app.use(session_middleware);
+
+// convert a connect middleware to a Socket.IO middleware
+const wrap = middleware => (socket, next) => middleware(socket.request, {}, next);
+
+io.use(wrap(session_middleware));
+
+// Load comments at server startup
+fs.readFile(state_file, (err, data) => {
+    if (err)
+        state = { images: [], comments: [] };
+    else
+        state = JSON.parse(data);
+});
+
+// Save comments when server is shutting down
+function cleanup() {
+    fs.writeFileSync('zombocom-state.json', JSON.stringify(state), (error) => {
+        if (error)
+            throw error;
+    })
+}
+
+// And connect to that on either clean exit...
+process.on('exit', cleanup);
+
+// ... or on a SIGINT (control-C)
+process.on('SIGINT', () => {
+    cleanup();
+    process.exit();
+});
+
+app.get('/index.html', (req, res) => {
     res.sendFile(__dirname + '/index.html');
 });
 
+io.on('connection', (socket) => {
+
+    // First things first, tell the client their name (if any)
+    if (socket.request.session.name) {
+        socket.emit('inform-name', socket.request.session.name);
+    }
+
+    // Replay old comments and images to a newly-joining client
+    socket.emit('reset');
+    state.images.forEach((image) => {
+        socket.emit('image', image)
+    });
+    state.comments.forEach((comment) => {
+        socket.emit('comment', comment)
+    });
+
+    socket.on('set-name', (name) => {
+        console.log("Received set-name event: " + name);
+        socket.request.session.name = name;
+        socket.request.session.save();
+    });
+
+    // When any client comments, send that to all clients (including sender)
+    socket.on('comment', (comment) => {
+        comment.name = socket.request.session.name;
+        io.emit('comment', comment);
+        state.comments.push(comment);
+    });
+
+    // Generate an image when requested
+    socket.on('generate', (request) => {
+        console.log(`Generating image with code=${request['code']} and prompt=${request['prompt']}`);
+        async function generate_image(code, prompt) {
+            var promise;
+            if (code) {
+                promise = execFile(python_path, [generate_image_script, `--seed=${code}`, prompt])
+            } else {
+                promise = execFile(python_path, [generate_image_script, prompt])
+            }
+            const child = promise.child;
+            child.stdout.on('data', (data) => {
+                const images = JSON.parse(data);
+                images.forEach((image) => {
+                    image.index = state.images.length;
+                    io.emit('image', image);
+                    state.images.push(image);
+                });
+            });
+            child.stderr.on('data', (data) => {
+                console.log("Error occurred during generate-image: " + data);
+            });
+            try {
+                const { stdout, stderr } = await promise;
+            } catch(e) {
+                console.error(e);
+            }
+            socket.emit('generation-done');
+        }
+        generate_image(request['code'], request['prompt']);
+    });
+});
+
 server.listen(port, () => {
     console.log(`listening on *:${port}`);
 });
-