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app_base.py
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app_base.py
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import pandas as pd
import streamlit as st
import mysql.connector
from mysql.connector import errorcode
class DBLink(object):
def __init__(self, UCID=st.secrets.db_username, pwd=st.secrets.db_password, host="mysql01.arcs.njit.edu") -> None:
self.config = {'user': '%s' %UCID,
'password': '%s' %pwd,
'host': '%s' %host,
'database': '%s' %UCID,
'raise_on_warnings': True}
self._alias = None
return
@property
def connection(self):
try:
cnx = mysql.connector.connect(**self.config)
return cnx
except mysql.connector.Error as err:
if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:
st.error("Something is wrong with your user name or password")
elif err.errno == errorcode.ER_BAD_DB_ERROR:
st.error("Database does not exist")
else:
st.error(err)
def check_CID(self):
if st.session_state.CID:
CID = st.session_state.CID
df = self.query("SELECT CID FROM CUSTOMER WHERE CID = \"%s\";" %CID)
if df.empty:
self._logged_in = False
st.warning("Incorrect CID. Please try again.")
else:
self._logged_in = True
def get_alias(self):
CID = st.session_state.CID
df = self.query("SELECT * FROM CUSTOMER WHERE CID = \"%s\";" %CID)
df = df.to_dict("index")[0]
self._alias = df
return
def login_prompt(self):
st.text_input("Enter CID:", value="10013", key="CID")
if st.button("Login", type="primary"):
self.check_CID()
def logout(self):
delattr(self, "_logged_in")
def welcome(self):
st.success("Login successful.")
self.get_alias()
def query(self, cmd):
cnx = self.connection
try:
cursor = cnx.cursor(dictionary=True)
cursor.execute(cmd, multi=True)
val_dict = cursor.fetchall()
attr = cursor.column_names
df = pd.DataFrame(columns=attr)
for val in val_dict:
df_val = pd.DataFrame(val, columns=list(val.keys()), index=[0])
df = pd.concat([df, df_val], ignore_index=True)
cnx.close()
return df
except Exception as err:
st.error(err)
def insert(self, cmd):
cnx = self.connection
try:
cursor = cnx.cursor(dictionary=True)
cursor.execute(cmd, multi=True)
return
except Exception as err:
st.error(err)
def get_products(self):
ptypes_df = self.query("SELECT DISTINCT(PType) FROM PRODUCT;")
ptypes = ptypes_df["PType"].sort_values().values.tolist()
PType = st.selectbox("Select the product type to view available products", ["All"] + ptypes)
if PType == "All":
products_df = self.query("SELECT * FROM PRODUCT;")
st.dataframe(products_df, use_container_width=True)
else:
products_df = self.query("SELECT * FROM PRODUCT WHERE PType = \"%s\";" %PType)
st.dataframe(products_df, use_container_width=True)
return
def get_offers(self):
ptypes_df = self.query("SELECT DISTINCT(PType) FROM PRODUCT NATURAL JOIN OFFER_PRODUCT;")
ptypes = ptypes_df["PType"].sort_values().values.tolist()
PType = st.selectbox("Select the product type to view available products", ["All"] + ptypes)
if PType == "All":
products_df = self.query("SELECT * FROM PRODUCT NATURAL JOIN OFFER_PRODUCT;")
st.dataframe(products_df, use_container_width=True)
else:
products_df = self.query("SELECT * FROM PRODUCT NATURAL JOIN OFFER_PRODUCT WHERE PType = \"%s\";" %PType)
st.dataframe(products_df, use_container_width=True)
return
def get_info(self):
st.table(self._alias)
return
def get_cards(self):
CID = st.session_state.CID
cards_df = self.query("SELECT * FROM CREDIT_CARD JOIN CUSTOMER ON CREDIT_CARD.StoredCardCID = CUSTOMER.CID WHERE CREDIT_CARD.StoredCardCID = \"%s\";" %CID)
st.dataframe(cards_df, use_container_width=True)
return
def get_address(self):
CID = st.session_state.CID
address_df = self.query("SELECT * FROM SHIPPING_ADDRESS WHERE CID = \"%s\";" %CID)
st.dataframe(address_df, use_container_width=True)
return
def get_cart(self):
CID = st.session_state.CID
carts_df = self.query("SELECT * FROM PRODUCT NATURAL JOIN APPEARS_IN NATURAL JOIN BASKET WHERE CID = \"%s\" AND BID NOT IN (SELECT BID FROM TRANSACTION);" %CID)
st.dataframe(carts_df, use_container_width=True)
return
def get_orders(self):
CID = st.session_state.CID
orders_df = self.query("SELECT * FROM TRANSACTION WHERE CID = \"%s\";" %CID)
st.dataframe(orders_df, use_container_width=True)
return
def buy(self):
CID = st.session_state.CID
col1, col2 = st.columns(2)
BID = col1.number_input("Basket ID:")
cid = col1.number_input("Customer ID:", value=int(CID))
SAName = col2.text_input("Shipping Address:")
TDate = col2.date_input("Date:", value="today")
CCNumber = col1.number_input("Card Number:")
TTag = col2.text_input("Tag:", value = "Not Delivered")
self.insert("INSERT INTO TRANSACTION VALUES(%d, %d, %s, %s, %d, %s);" %(BID,cid,SAName,TDate,CCNumber,TTag))
return