improved frontend, started csv upload endpoint

server/db.js

@@ -2,6 +2,7 @@ import chalk from 'chalk'
 import path from 'path';
 import fs from 'fs/promises';
 import { pathToFileURL } from 'url';
+import parse from "csv-parser"
 import Node from "../model/Node.js"
 
 export default class Database {
@@ -74,4 +75,75 @@ export default class Database {
     async getAll() {
         return { nodes: this.#nodes }
     }
+
+    async loadCSV(csvString) {
+        if (!csvString || typeof csvString !== 'string') {
+            throw new Error('loadCSVAsync: input must be a non-empty string');
+        }
+
+        return new Promise((resolve, reject) => {
+            const records = [];
+
+            const parser = parse({
+                columns: true,
+                skip_empty_lines: true,
+                trim: true,
+                relax_column_count: true,
+                bom: true
+            });
+
+            parser.on('readable', () => {
+                let row;
+                while ((row = parser.read()) !== null) {
+                    records.push(this.cleanRow(row));
+                }
+            });
+
+            parser.on('error', (err) => {
+                reject(err);
+            });
+
+            parser.on('end', () => {
+                resolve(records);
+            });
+
+            // Feed the CSV string
+            parser.write(csvString);
+            parser.end();
+        });
+    }
+
+    cleanRow(row) {
+        const cleaned = {};
+
+        for (let [key, value] of Object.entries(row)) {
+            // 1. Clean header
+            key = key
+            .replace(/ -MyData/g, '')
+            .replace(/[^a-zA-Z0-9]/g, ' ')
+            .trim()
+            .replace(/\s+(.)/g, (_, c) => c.toUpperCase())
+            .replace(/^(.)/, c => c.toLowerCase());
+
+            // 2. Empty → null
+            if (value === '' || value == null) {
+            cleaned[key] = null;
+            continue;
+            }
+
+            // 3. Type conversion
+            if (key === 'registrationStatus') {
+            cleaned[key] = value === 'True' ? true : value === 'False' ? false : null;
+            } 
+            else if (['confidences', 'personId', 'uid', 'stateVoterId'].includes(key)) {
+            const num = parseFloat(value);
+            cleaned[key] = isNaN(num) ? null : num;
+            } 
+            else {
+            cleaned[key] = value;
+            }
+        }
+
+        return cleaned;
+    }
 }

server/handlers.js

@@ -6,6 +6,13 @@ const handlers = {
         console.log(`Received location: (${name}, ${latitude}, ${longitude}) at ${timestamp}`);
         broadcast("update-location", { name, latitude, longitude, timestamp });
         res.json({ success: true });
+    },
+
+    async uploadCSV(req, res) {
+        const csvString = req.body;
+        console.log(csvString);
+        await global.db.uploadCSV(csvString)
+        res.json({ ok: true });
     }
 }
 

server/index.js

@@ -22,6 +22,7 @@ class Server {
 
     registerRoutes(router) {
         router.post('/api/location', handlers.updateLocation)
+        router.post('/csv', handlers.uploadCSV)
         router.post('/login', this.login)
         router.get('/*', this.get)
         return router
@@ -115,7 +116,7 @@ class Server {
     }
 
     constructor() {
-        this.db = new Database()
+        global.db = new Database()
         this.auth = new AuthHandler()
         const app = express();
         app.use(cors({ origin: '*' }));