inventory skeleton

calculator/js/script.js

@@ -1,5 +1,5 @@
-let display = document.querySelector('.display');
-const buttons = document.querySelectorAll('.btn');
+let display = document.querySelector(".display");
+const buttons = document.querySelectorAll(".btn");
 
 const ops = {
   firstNum: String(),
@@ -13,7 +13,7 @@ const ops = {
   result: String(),
 
   toggleNumFlag: function () {
-    this.numFlag = !this.numFlag
+    this.numFlag = !this.numFlag;
   },
   clear: function () {
     this.firstNum = String();
@@ -25,7 +25,7 @@ const ops = {
     display.textContent = "0";
   },
   appendNumber: function (num) {
-    if(num === "0" && display.textContent.trim() === "0") return
+    if (num === "0" && display.textContent.trim() === "0") return;
     if (!ops.numFlag && ops.checkLength(ops.firstNum)) {
       ops.firstNum += num;
       updateDisplay(ops.firstNum);
@@ -38,7 +38,7 @@ const ops = {
   },
   checkLength: function (string) {
     return string.length < this.stringLength;
- }
+  },
 };
 
 function add(x, y) {
@@ -55,23 +55,23 @@ function multiply(x, y) {
 
 function divede(x, y) {
   if (x === 0) {
-        return 0
+    return 0;
   } else if (y === 0) {
     alert("Cannot divide by 0!");
-        return "Error"
+    return "Error";
   }
   return x / y;
 }
 
 function operate(firstNum, secondNum, operator) {
   switch (operator) {
-        case '+':
+    case "+":
       return add(firstNum, secondNum);
-        case '-':
+    case "-":
       return subtract(firstNum, secondNum);
-        case '*':
+    case "*":
       return multiply(firstNum, secondNum);
-        case '/':
+    case "/":
       return divede(firstNum, secondNum);
   }
 }
@@ -79,9 +79,10 @@ function operate(firstNum, secondNum, operator) {
 function handleOperation() {
   const first = Number(ops.firstNum);
   const second = Number(ops.secondNum);
+  console.log(`last operator: ${ops.operator}`);
   let result = operate(first, second, ops.operator);
 
-    if (result === "error") {
+  if (result === "Error") {
     ops.clear();
     return;
   }
@@ -92,17 +93,19 @@ function handleOperation() {
   // store result
   ops.result = result;
 
-    if (ops.lastOperator === '=') {
+  if (ops.operator === "=") {
     ops.firstNum = String();
     ops.secondNum = String();
     ops.numFlag = false;
-        ops.onSecondNumber = !ops.onSecondNumber;
+    ops.onSecondNumber = false;
   } else {
     ops.firstNum = ops.result;
     ops.secondNum = "";
+    ops.operator = "";
     ops.onSecondNumber = true;
   }
-    // ops.operator = undefined;
+  ops.operator = undefined;
+    ops.lastOperator = undefined;
 }
 
 function updateDisplay(displayValue) {
@@ -110,8 +113,7 @@ function updateDisplay(displayValue) {
 }
 
 function roundThreeDecimals(number) {
-    if (!Number.isInteger(number) && Number.isFinite(number)
-    ) {
+  if (!Number.isInteger(number) && Number.isFinite(number)) {
     return parseFloat(number.toPrecision(3));
   } else {
     return number;
@@ -119,64 +121,62 @@ function roundThreeDecimals(number) {
 }
 
 function handleOperatorClick(operatorClicked) {
-   
-    ops.lastOperator = operatorClicked;
+  ops.operator = operatorClicked;
   // TODO handle ops for = or clear
-    if (operatorClicked === 'cls') {
+  if (operatorClicked === "cls") {
     ops.clear();
     return;
-    } else if (operatorClicked === '=') {
-        ops.lastOperator = '=';
+  } else if (operatorClicked === "=") {
+    if (ops.lastOperator) {
+      ops.operator = ops.lastOperator;
+    }
     handleOperation();
     return;
-    } else if (operatorClicked === '+/-') {
+  } else if (operatorClicked === "+/-") {
     negateNumber();
     return;
-    } else if (operatorClicked === '%') {
+  } else if (operatorClicked === "%") {
     percentageNumber();
     return;
   } else {
     if (ops.secondNum && ops.numFlag) {
+      ops.lastOperator = operatorClicked;
       handleOperation();
       return;
     }
   }
 
-    
-    ops.operator = operatorClicked;
   //TODO fix this conditional should be if numFlag and a check if = or additional ops
   if (!ops.onSecondNumber) {
     ops.numFlag = true;
     if (ops.result !== "") {
-            console.log('this is running the ops.result');
+      console.log("this is running the ops.result");
       ops.firstNum = ops.result;
       ops.onSecondNumber = true;
-            return
+      return;
     }
   }
-    ops.onSecondNumber = !ops.onSecondNumber;
+  // ops.onSecondNumber = !ops.onSecondNumber;
 }
 
 function calculator(event) {
-
   if (event.target.dataset.ops === "") {
     handleOperatorClick(event.target.value);
-    } else if (event.target.value === '.') {
-        if (display.textContent.includes('.')) {
-            return
+  } else if (event.target.value === ".") {
+    if (display.textContent.includes(".")) {
+      return;
     } else {
-        ops.appendNumber(event.target.value)
+      ops.appendNumber(event.target.value);
     }
-
   } else if (event.target.dataset.num === "") {
-        ops.appendNumber(event.target.value)
+    ops.appendNumber(event.target.value);
   }
 }
 
 function negateNumber() {
   // returns a negated number
   let negated;
-    if (!ops.numFlag || !ops.onSecondNumber) {
+  if (!ops.numFlag || ops.secondNum === "") {
     negated = Number(ops.firstNum) * -1;
     ops.firstNum = String(negated);
   } else {
@@ -188,7 +188,7 @@ function negateNumber(){
 
 function percentageNumber() {
   let percent;
-    if ((!ops.numFlag || !ops.onSecondNumber)) {
+  if (!ops.numFlag || !ops.secondNum === "") {
     percent = Number(ops.firstNum) / 100;
     ops.firstNum = String(percent);
   } else if (ops.result !== "") {
@@ -200,6 +200,6 @@ function percentageNumber() {
   updateDisplay(percent);
 }
 
-buttons.forEach(btn => {
-    btn.addEventListener('click', calculator);
+buttons.forEach((btn) => {
+  btn.addEventListener("click", calculator);
 });

inventory/package.json

@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "ejs": "^3.1.10",
+    "express": "^4.21.2",
+    "express-validator": "^7.2.1",
+    "pg": "^8.13.1"
+  }
+}

inventory/src/app.js

@@ -0,0 +1,31 @@
+const express = require("express");
+const path = require("node:path");
+
+const app = express();
+const port = 8080;
+
+const { indexRouter } = require("./routes/indexRouter");
+const assetsPath = path.join(path.dirname(__dirname), "public");
+
+app.set("views", path.join(__dirname, "views"));
+app.set(express.static(assetsPath));
+
+app.use(express.urlencoded({ extended: true }));
+
+app.use("/", indexRouter);
+
+const server = app.listen(port, () => {
+  console.log(`Server started at ${port}`);
+});
+
+const gracefulShutdownHandler = (signal) => {
+  console.log(`Caught ${signal}, gracefully shutting down`);
+
+  server.close(() => {
+    console.log("shutting down server.");
+    process.exit();
+  });
+};
+
+process.on("SIGINT", gracefulShutdownHandler);
+process.on("SIGTERM", gracefulShutdownHandler);

inventory/src/routes/indexRouter.js

@@ -0,0 +1,9 @@
+const { Router } = require("express");
+
+const indexRouter = Router();
+
+indexRouter.get("/", (req, res) => {
+  res.send("index");
+});
+
+module.exports = { indexRouter };