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bamazonManager.js
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bamazonManager.js
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// Dependencies
var mysql = require("mysql");
var wrap = require("word-wrap");
var Table = require("cli-table");
var inquirer = require("inquirer");
var colors = require("colors");
// sets connection param for database connection
var connection = mysql.createConnection({
host: "localhost",
port: 3306,
// sets username
user: "root",
// sets password
password: "",
// sets current database
database: "bamazon_db"
});
// makes connection with the server
connection.connect(function (err) {
if (err) throw err;
console.log("connected as id " + connection.threadId);
chooseMenu();
});
// manager chooses a from a menu list
function chooseMenu() {
inquirer
.prompt({
name: "menu",
type: "list",
message: "Please select a menu option?",
choices: [
"View Products for Sale",
"View Low Inventory",
"Add to Inventory",
"Add New Product",
"Exit Manager View"
]
})
.then(function (answer) {
// console.log(answer);
switch (answer.menu) {
case "View Products for Sale":
displayItemsForSale();
break;
case "View Low Inventory":
displayLowInventory();
break;
case "Add to Inventory":
displayItemsForSale(addToInvetory);
break;
case "Add New Product":
askQuestions();
break;
case "Exit Manager View":
exit();
break;
}
})
}
// displays low invetory when requested
function displayItemsForSale(func) {
connection.query(
"SELECT item_id, product_name, price, stock_quantity, department_name " +
"FROM products " +
"WHERE price > 0;", function (err, result) {
if (err) throw err;
// gets and builds the table header
var obj = result[0];
var header = [];
for (var prop in obj) {
header.push(prop);
}
// instantiate
var table = new Table({
head: header,
colWidths: [15, 55, 10, 5, 20]
});
// gets and sets the data in the table
var item_ids = [];
for (var i = 0; i < result.length; i++) {
item_ids.push(result[i].item_id);
table.push([result[i].item_id, wrap(result[i].product_name), result[i].price.toFixed(2),
result[i].stock_quantity, result[i].department_name]);
}
var output = table.toString();
console.log(output);
if (func) {
func(item_ids);
} else {
chooseMenu();
}
});
}
// displays low inventory (stock lower or equal than 5) when requested
function displayLowInventory() {
connection.query(
"SELECT item_id, stock_quantity " +
"FROM products " +
"WHERE stock_quantity <= 5;", function (err, result) {
// console.log(err)
var obj = result[0];
var header = [];
for (var prop in obj) {
header.push(prop);
}
// instantiate
var table = new Table({
head: header,
colWidths: [15, 10]
});
for (var i = 0; i < result.length; i++) {
table.push([result[i].item_id, result[i].stock_quantity]);
}
var output = table.toString();
console.log(output);
chooseMenu();
});
}
// funtion adds to inventory
function addToInvetory(list) {
inquirer
.prompt([{
name: "action",
type: "list",
message: "Select item:",
choices: list
},
{
name: "quantity",
type: "input",
message: "Update quantity with:",
}])
.then(function (answer) {
updateQuantity(answer.action, answer.quantity);
})
}
function updateQuantity(item, quant) {
var query = "UPDATE products SET stock_quantity = stock_quantity + ? WHERE ?"
connection.query(
query,
[
quant,
{
item_id: item
}
],
function (err, res) {
if (err) throw err;
console.log("DB has been updated!".green);
chooseMenu();
}
);
}
// prompts for adding new item
function askQuestions() {
inquirer
.prompt([{
name: "id",
message: "Input Item ID: "
},
{
name: "name",
message: "Input Product Name: "
},
{
name: "department",
type: "list",
message: "Select Department",
choices: ["Electronics", "Books", "Clothing", "Shoes", "Handmade"]
},
{
name: "price",
message: "Input Product Cost: "
},
{
name: "stock",
message: "Input Stock Quantity: "
}])
.then(function (answer) {
// adds new item to database
addNewItem(answer.id, answer.name, answer.department, answer.price, answer.stock);
});
}
// adds new item to product table
function addNewItem(id, name, department, price, stock) {
var query = "INSERT INTO products SET ?"
connection.query(query,
{
item_id: id,
product_name: name,
department_name: department,
price: price,
stock_quantity: stock
},
function (err, res) {
if (err) console.log(err)
console.log(`New item ${id} is added to DB!`.green);
chooseMenu();
}
)
}
function exit() {
connection.end();
process.exit(-1);
}