Expense Tracker

!pip install gradio
import gradio as gr
#Binary search for a particular transaction or expense by amount
transactions = [
{"date": "2024-08-01", "amount": 50.0, "description": "Groceries"},
{"date": "2024-08-02", "amount": 20.0, "description": "Bus fare"},
{"date": "2024-08-03", "amount": 100.0, "description": "Electricity bill"},
{"date": "2024-08-04", "amount": 200.0, "description": "New shoes"},
]

#linear search for transaction by date
def search_by_date(target_date):
  for transaction in transactions:
    if transaction["date"]==target_date:
      return transaction
  return "transaction not found"

#print(search_by_date("2024-08-03"))

#in the transactions array we use the sort method to sort the amount key value
#in all the dictionaries  in the transactions array and we also use the lambda function
#which is a small anonymous fuction which is use to take any number of arguments
#inside the function in this case we are fetching  all of the amount values as arguments
def search_by_amount(target_amount):
  transactions.sort(key=lambda x:x["amount"])

  left=0
  right=len(transactions)-1
  while left<=right:
    mid=(left+right)//2
    if transactions[mid]["amount"]== target_amount:
      return transactions[mid]
    elif transactions[mid]["amount"]<target_amount:
      left=mid
    else:
      right=mid-1
  return "transaction not found"

print(search_by_amount(50.0))

#adding a new expense
def add_expense(date,amount,description):
  new_transaction={"date":date,"amount":amount,"description":description}
  transactions.append(new_transaction)
  return "expense added successfully!"


#cheking amount by description
def total_spent_by_description(description):
  total_spent=sum(transaction["amount"] for transaction in transactions if transaction["description"].lower()==description.lower())
  if total_spent > 0:
    return {"Description :": description,"total_spent: ":total_spent}
  else:
    return "No expenses were found for description in the transactions"

#displaying all of the expenses
def display_all_expenses():
  if transactions:
    return transactions
  else:
    return "no transactions available"

#Gradio: It is an open source python library that allows u to create user friendly interfaces
"""
4 components
1.Block: It is function in gradio which is used as container which it contain multiple small elements
2.Markdown: Markdown is a component which is use to add text
3.Tab : It is a component in gradio which is used to create tab section is your interface
4.Button : Button is a component in gradio which enables a page to have interacten element whenever u press a particular button which triggers the action

"""


#building a gradio interface
with gr.Blocks() as demo:
  gr.Markdown("#Expense tracker")

  with gr.Tab("Search By Date"):
    date_input=gr.Textbox(label="enter date(YYYY-MM-DD)")
    #json is javascript object notation which is a text based format for storing strings
    date_output=gr.JSON(label="result")
    gr.Button("Search").click(fn=search_by_date,inputs=date_input,outputs=date_output)


  with gr.Tab("Search By Amount"):
    amount_input=gr.Number(label="enter amount")
    #json is javascript object notation which is a text based format for storing strings
    amount_output=gr.JSON(label="result")
    gr.Button ("Search").click(fn=search_by_amount,inputs=amount_input,outputs=amount_output)

  with gr.Tab("Add a new expense"):
    date_input=gr.Textbox(label="enter date(YYYY-MM-DD)")
    amount_input=gr.Number(label="enter amount")
    description_input=gr.Textbox(label="Enter the description")
    add_output=gr.Textbox(label="status")
    gr.Button("Add expense").click(fn=add_expense,inputs=[date_input,amount_input,description_input],outputs=add_output)

  with gr.Tab("Display all expenses"):
    all_expenses_output=gr.JSON(label="all expenses")
    gr.Button("Show all Expenses").click(fn=display_all_expenses,outputs=all_expenses_output)

demo.launch()