Create app.py

app.py

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+import streamlit as st
+import pymongo
+
+# Connect to MongoDB database
+client = pymongo.MongoClient("mongodb://localhost:27017/")
+db = client["todo_db"]
+collection = db["tasks"]
+
+# Define a function to create a task
+def create_task(task, category, priority):
+    # Create a dictionary with the task information
+    task_dict = {"task": task, "category": category, "priority": priority}
+    # Insert the task into the database
+    collection.insert_one(task_dict)
+    # Display a success message
+    st.success("Task created successfully!")
+
+# Define a function to edit a task
+def edit_task(id, task, category, priority):
+    # Create a dictionary with the updated task information
+    new_values = {"$set": {"task": task, "category": category, "priority": priority}}
+    # Update the task in the database using the id
+    collection.update_one({"_id": id}, new_values)
+    # Display a success message
+    st.success("Task edited successfully!")
+
+# Define a function to delete a task
+def delete_task(id):
+    # Delete the task from the database using the id
+    collection.delete_one({"_id": id})
+    # Display a success message
+    st.success("Task deleted successfully!")
+
+# Define a function to validate the user input
+def validate_input(task, category, priority):
+    # Check if any field is empty
+    if task == "" or category == "" or priority == "":
+        # Display a warning message
+        st.warning("Please fill in all the fields before creating or editing a task.")
+        # Return False to indicate invalid input
+        return False
+    else:
+        # Return True to indicate valid input
+        return True
+
+# Create a sidebar with navigation options
+st.sidebar.title("To-do List App")
+navigation = st.sidebar.radio("Navigation", ["Home", "Create", "Edit", "Delete"])
+
+# Display the corresponding page based on the navigation option
+if navigation == "Home":
+    # Display the title and subtitle
+    st.title("To-do List App")
+    st.subheader("View your tasks")
+    # Fetch all the tasks from the database and sort them by priority
+    tasks = collection.find().sort("priority", -1)
+    # Display the tasks in a table
+    st.table(tasks)
+elif navigation == "Create":
+    # Display the title and subtitle
+    st.title("To-do List App")
+    st.subheader("Create a new task")
+    # Create input fields for the task information
+    task = st.text_input("Task")
+    category = st.text_input("Category")
+    priority = st.number_input("Priority (1-5)", min_value=1, max_value=5)
+    # Create a button to create the task
+    if st.button("Create"):
+        # Validate the user input
+        if validate_input(task, category, priority):
+            # Create the task
+            create_task(task, category, priority)
+elif navigation == "Edit":
+    # Display the title and subtitle
+    st.title("To-do List App")
+    st.subheader("Edit an existing task")
+    # Create a selectbox to choose a task to edit
+    tasks = collection.find()
+    task_list = [(task["_id"], task["task"]) for task in tasks]
+    task_id, task_name = st.selectbox("Select a task to edit", task_list)
+    # Create input fields for the new task information
+    new_task = st.text_input("Task", value=task_name)
+    new_category = st.text_input("Category")
+    new_priority = st.number_input("Priority (1-5)", min_value=1, max_value=5)
+    # Create a button to edit the task
+    if st.button("Edit"):
+        # Validate the user input
+        if validate_input(new_task, new_category, new_priority):
+            # Edit the task
+            edit_task(task_id, new_task, new_category, new_priority)
+elif navigation == "Delete":
+    # Display the title and subtitle
+    st.title("To-do List App")
+    st.subheader("Delete a task")
+    # Create a selectbox to choose a task to delete
+    tasks = collection.find()
+    task_list = [(task["_id"], task["task"]) for task in tasks]
+    task_id, task_name = st.selectbox("Select a task to delete", task_list)
+    # Create a button to delete the task
+    if st.button("Delete"):
+        # Delete the task
+        delete_task(task_id)