first commit

server/db.js

@@ -0,0 +1,56 @@
+const duckdb = require('duckdb');
+const path = require('path');
+
+const dbPath = path.join(__dirname, 'data', 'chat.duckdb');
+const db = new duckdb.Database(dbPath);
+
+const con = db.connect();
+
+// Initialize Schema
+con.exec(`
+    CREATE TABLE IF NOT EXISTS users (
+        wallet_address VARCHAR PRIMARY KEY,
+        username VARCHAR UNIQUE,
+        last_seen TIMESTAMP
+    );
+
+    CREATE TABLE IF NOT EXISTS messages (
+        id INTEGER PRIMARY KEY,
+        channel_id VARCHAR,
+        wallet_address VARCHAR,
+        content VARCHAR,
+        timestamp TIMESTAMP,
+        tx_id VARCHAR,
+        FOREIGN KEY (wallet_address) REFERENCES users(wallet_address)
+    );
+
+    CREATE TABLE IF NOT EXISTS reactions (
+        message_id INTEGER,
+        wallet_address VARCHAR,
+        emoji VARCHAR,
+        PRIMARY KEY (message_id, wallet_address, emoji),
+        FOREIGN KEY (wallet_address) REFERENCES users(wallet_address)
+    );
+    
+    CREATE SEQUENCE IF NOT EXISTS seq_msg_id START 1;
+
+    -- Migration: Add tx_id to messages if it doesn't exist (for existing DBs)
+    PRAGMA table_info('messages');
+`, (err) => {
+    if (err) return console.error('Schema error:', err);
+
+    // Check if tx_id exists, if not add it
+    con.all("PRAGMA table_info('messages')", (err, rows) => {
+        if (err) return;
+        const hasTxId = rows.some(r => r.name === 'tx_id');
+        if (!hasTxId) {
+            con.run("ALTER TABLE messages ADD COLUMN tx_id VARCHAR", (err) => {
+                if (err) console.error("Error adding tx_id column:", err);
+                else console.log("Added tx_id column to messages table");
+            });
+        }
+    });
+    console.log('Database initialized and cleared');
+});
+
+module.exports = { db, con };