refactored categories code, now a seperate modifiable file

style changes and refinements

server.js

@@ -5,6 +5,7 @@ const sqlite3 = require('sqlite3').verbose();
 const path = require('path');
 const http = require('http');
 const { Server } = require('socket.io');
+const fs = require('fs');
 
 const app = express();
 const server = http.createServer(app);
@@ -63,6 +64,76 @@ app.post('/api/positions', (req, res) => {
   );
 });
 
+// Serve categories and fruits from a JSON file
+app.get('/api/categories', (req, res) => {
+  const categoriesPath = path.join(__dirname, 'categories.json');
+  fs.readFile(categoriesPath, 'utf8', (err, data) => {
+    if (err) return res.status(500).json({ error: 'Could not load categories' });
+    try {
+      const categories = JSON.parse(data);
+      res.json(categories);
+    } catch (e) {
+      res.status(500).json({ error: 'Invalid categories file' });
+    }
+  });
+});
+
+// Add a fruit to a category in categories.json
+app.post('/api/add-fruit', (req, res) => {
+  const { category, fruit } = req.body;
+  if (!category || !fruit) {
+    return res.status(400).json({ error: 'category and fruit required' });
+  }
+  const categoriesPath = path.join(__dirname, 'categories.json');
+  fs.readFile(categoriesPath, 'utf8', (err, data) => {
+    if (err) return res.status(500).json({ error: 'Could not load categories' });
+    let categories;
+    try {
+      categories = JSON.parse(data);
+    } catch (e) {
+      return res.status(500).json({ error: 'Invalid categories file' });
+    }
+    const cat = categories.find(c => c.name === category);
+    if (!cat) return res.status(404).json({ error: 'Category not found' });
+    // Prevent duplicates
+    if (cat.fruits.includes(fruit)) {
+      return res.status(400).json({ error: 'Fruit already exists in category' });
+    }
+    cat.fruits.push(fruit);
+    fs.writeFile(categoriesPath, JSON.stringify(categories, null, 2), err2 => {
+      if (err2) return res.status(500).json({ error: 'Could not save categories' });
+      res.json({ success: true });
+    });
+  });
+});
+
+// Delete a fruit from a category in categories.json
+app.post('/api/delete-fruit', (req, res) => {
+  const { category, fruit } = req.body;
+  if (!category || !fruit) {
+    return res.status(400).json({ error: 'category and fruit required' });
+  }
+  const categoriesPath = path.join(__dirname, 'categories.json');
+  fs.readFile(categoriesPath, 'utf8', (err, data) => {
+    if (err) return res.status(500).json({ error: 'Could not load categories' });
+    let categories;
+    try {
+      categories = JSON.parse(data);
+    } catch (e) {
+      return res.status(500).json({ error: 'Invalid categories file' });
+    }
+    const cat = categories.find(c => c.name === category);
+    if (!cat) return res.status(404).json({ error: 'Category not found' });
+    const idx = cat.fruits.indexOf(fruit);
+    if (idx === -1) return res.status(404).json({ error: 'Fruit not found in category' });
+    cat.fruits.splice(idx, 1);
+    fs.writeFile(categoriesPath, JSON.stringify(categories, null, 2), err2 => {
+      if (err2) return res.status(500).json({ error: 'Could not save categories' });
+      res.json({ success: true });
+    });
+  });
+});
+
 // start server
 const PORT = process.env.PORT || 3085;
 server.listen(PORT, () => {