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README.md

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----
-title: Lib
-emoji: 🐨
-colorFrom: purple
-colorTo: gray
-sdk: gradio
-sdk_version: 5.34.2
-app_file: app.py
-pinned: false
----
-
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# Gradio Library Inventory App
+
+A minimal multi-user web app for managing book inventory and checkout logs using Gradio and Google Sheets.
+
+## 📝 Google Sheet Template
+
+Copy this sheet and set its access to "Anyone with the link can edit":
+👉 https://docs.google.com/spreadsheets/d/1u6klpE_4Rm2i-sxXgNf5wK1M-Kj9csQqXQ3M6P8eX40/edit?usp=sharing
+
+Make sure your Google Service Account has edit access if using credentials.
+
+## 🚀 Deploy on Hugging Face
+
+1. Create a new **Gradio Space** on [Hugging Face Spaces](https://huggingface.co/spaces)
+2. Upload:
+   - `app.py`
+   - `requirements.txt`
+   - `credentials.json` (downloaded from Google Cloud Console)
+3. Set visibility to **Private or Protected** to secure your credentials
+4. Your app is ready!

app.py

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+import gradio as gr
+import gspread
+from datetime import datetime
+
+# Google Sheet ID (replace with your own copy)
+SHEET_ID = "1u6klpE_4Rm2i-sxXgNf5wK1M-Kj9csQqXQ3M6P8eX40"
+
+# Connect to public Google Sheet (read/write access required)
+gc = gspread.service_account(filename="credentials.json")
+sheet = gc.open_by_key(SHEET_ID)
+book_sheet = sheet.worksheet("Books")
+log_sheet = sheet.worksheet("Logs")
+
+def add_book(title, author, genre):
+    next_id = len(book_sheet.get_all_records()) + 1
+    book_sheet.append_row([next_id, title, author, genre, "Yes"])
+    log_sheet.append_row([len(log_sheet.get_all_records()) + 1, next_id, "Added", "Admin", datetime.now().isoformat()])
+    return "✅ Book added!"
+
+def view_inventory():
+    return book_sheet.get_all_values()
+
+def checkout_book(book_id, user):
+    books = book_sheet.get_all_records()
+    for i, book in enumerate(books):
+        if int(book["ID"]) == int(book_id) and book["Availability"] == "Yes":
+            book_sheet.update_cell(i+2, 5, "No")
+            log_sheet.append_row([len(log_sheet.get_all_records()) + 1, book_id, "Checked Out", user, datetime.now().isoformat()])
+            return "✅ Book checked out!"
+    return "❌ Book not available or not found"
+
+with gr.Blocks() as demo:
+    with gr.Tab("Add Book"):
+        t, a, g_ = gr.Text(label="Title"), gr.Text(label="Author"), gr.Text(label="Genre")
+        add_btn = gr.Button("Add Book")
+        out1 = gr.Textbox()
+        add_btn.click(add_book, [t, a, g_], out1)
+
+    with gr.Tab("Inventory"):
+        inv_btn = gr.Button("Refresh Inventory")
+        table = gr.Dataframe()
+        inv_btn.click(view_inventory, outputs=table)
+
+    with gr.Tab("Checkout Book"):
+        book_id = gr.Number(label="Book ID")
+        user = gr.Text(label="User Name")
+        chk_btn = gr.Button("Check Out")
+        out2 = gr.Textbox()
+        chk_btn.click(checkout_book, [book_id, user], out2)
+
+demo.launch()

requirements.txt

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+gradio
+gspread
+oauth2client