feat: add Discord bot integration for PDF receipt uploads and manual entry

Co-authored-by: aider (openai/unsloth/Qwen3-Coder-Next) <aider@aider.chat>

app.py

@@ -1,6 +1,9 @@
 import sqlite3
 from datetime import datetime
 import os
+import discord
+from discord.ext import commands
+import io
 
 DB_PATH = "grocery_receipts.db"
 
@@ -151,34 +154,114 @@ def list_receipts():
 # Initialize the database when the module is imported
 init_db()
 
+# Discord bot setup
+intents = discord.Intents.default()
+intents.message_content = True
+intents.members = True
+
+bot = commands.Bot(command_prefix='!', intents=intents)
+
+@bot.event
+async def on_ready():
+    print(f'{bot.user} has connected to Discord!')
+
+@bot.event
+async def on_message(message):
+    # Ignore messages from the bot itself
+    if message.author == bot.user:
+        return
+    
+    # Process commands
+    await bot.process_commands(message)
+    
+    # Handle receipt uploads
+    if message.attachments:
+        for attachment in message.attachments:
+            if attachment.filename.lower().endswith('.pdf'):
+                # Download the PDF
+                pdf_bytes = await attachment.read()
+                
+                # For now, we'll just acknowledge receipt and save the file
+                # In a full implementation, you'd extract text from the PDF using OCR
+                
+                # Save the PDF to a receipts folder
+                os.makedirs('receipts', exist_ok=True)
+                file_path = os.path.join('receipts', attachment.filename)
+                with open(file_path, 'wb') as f:
+                    f.write(pdf_bytes)
+                
+                # Send confirmation message
+                await message.channel.send(f"Receipt '{attachment.filename}' received and saved!")
+
+@bot.command(name='add_receipt')
+async def add_receipt_command(ctx, store_name: str, date: str, *, items: str):
+    """
+    Add a receipt manually.
+    Usage: !add_receipt StoreName 2023-10-15 "Product1,2,1.50;Product2,1,2.00"
+    """
+    try:
+        # Parse items: format is "Product1,quantity,price;Product2,quantity,price"
+        item_list = []
+        for item_str in items.split(';'):
+            parts = item_str.strip().split(',')
+            if len(parts) == 3:
+                product_name = parts[0].strip()
+                quantity = float(parts[1].strip())
+                price = float(parts[2].strip())
+                item_list.append((product_name, quantity, price))
+        
+        add_receipt(store_name, date, item_list)
+        await ctx.send(f"Receipt added for {store_name} on {date} with {len(item_list)} items!")
+    except Exception as e:
+        await ctx.send(f"Error adding receipt: {str(e)}")
+
+@bot.command(name='prices')
+async def prices_command(ctx, *, product_name: str):
+    """
+    Get price history for a product.
+    Usage: !prices ProductName
+    """
+    try:
+        prices = get_product_prices(product_name)
+        if not prices:
+            await ctx.send(f"No price history found for '{product_name}'.")
+            return
+        
+        message = f"Price history for '{product_name}':\n"
+        for date, store, qty, price in prices:
+            message += f"- {date} at {store}: ${price:.2f} per unit (qty: {qty})\n"
+        
+        await ctx.send(message)
+    except Exception as e:
+        await ctx.send(f"Error retrieving prices: {str(e)}")
+
+@bot.command(name='receipts')
+async def receipts_command(ctx):
+    """
+    List all receipts.
+    Usage: !receipts
+    """
+    try:
+        receipts = list_receipts()
+        if not receipts:
+            await ctx.send("No receipts found in the database.")
+            return
+        
+        message = "All receipts:\n"
+        for receipt_id, store, date, total in receipts:
+            message += f"- ID: {receipt_id}, Store: {store}, Date: {date}, Total: ${total:.2f}\n"
+        
+        await ctx.send(message)
+    except Exception as e:
+        await ctx.send(f"Error listing receipts: {str(e)}")
+
+# Run the bot
 if __name__ == "__main__":
-    # Example usage
-    print("Grocery Receipt Tracker - Demo")
-    print("=" * 30)
+    # You'll need to set your Discord bot token as an environment variable
+    # or replace the token parameter with your actual token (not recommended for production)
+    DISCORD_TOKEN = os.getenv('DISCORD_BOT_TOKEN')
+    if not DISCORD_TOKEN:
+        print("Error: DISCORD_BOT_TOKEN environment variable not set")
+        exit(1)
     
-    # Add a sample receipt
-    items = [
-        ("Milk", 2, 1.50),
-        ("Bread", 1, 2.00),
-        ("Apples", 3, 0.80)
-    ]
-    add_receipt("SuperMarket", "2023-10-15", items)
-    print("Added sample receipt to database.")
-    
-    # Add another receipt for comparison
-    items2 = [
-        ("Milk", 1, 1.30),
-        ("Bread", 1, 1.80)
-    ]
-    add_receipt("Corner Store", "2023-10-20", items2)
-    print("Added another receipt to database.")
-    
-    # Show all receipts
-    print("\nAll Receipts:")
-    for receipt in list_receipts():
-        print(f"  ID: {receipt[0]}, Store: {receipt[1]}, Date: {receipt[2]}, Total: ${receipt[3]:.2f}")
-    
-    # Show prices for a specific product
-    print("\nMilk Prices Over Time:")
-    for price_info in get_product_prices("Milk"):
-        print(f"  Date: {price_info[0]}, Store: {price_info[1]}, Qty: {price_info[2]}, Price: ${price_info[3]:.2f}")
+    bot.run(DISCORD_TOKEN)