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script.js
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script.js
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const calorieCounter = document.getElementById('calorie-counter');
const budgetNumberInput = document.getElementById('budget');
const entryDropdown = document.getElementById('entry-dropdown');
const addEntryButton = document.getElementById('add-entry');
const clearButton = document.getElementById('clear');
const output = document.getElementById('output');
let isError = false;
function cleanInputString(str) {
const regex = /[+-\s]/g;
return str.replace(regex, "");
}
function isInvalidInput(str) {
const regex = /\d+e\d+/i;
return str.match(regex);
}
function addEntry() {
const targetInputContainer = document.querySelector(`#${entryDropdown.value} .input-container`);
const entryNumber = targetInputContainer.querySelectorAll('input[type="text"]').length + 1;
const HTMLString = `
<label for="${entryDropdown.value}-${entryNumber}-name">Entry ${entryNumber} Name</label>
<input type="text" id="${entryDropdown.value}-${entryNumber}-name" placeholder="Name" />
<label for="${entryDropdown.value}-${entryNumber}-name">Entry ${entryNumber} Calories</label>
<input
type="number"
min="0"
id="${entryDropdown.value}-${entryNumber}-calories"
placeholder="Calories"
/>`;
targetInputContainer.insertAdjacentHTML("beforeend", HTMLString);
//above statements helps in adding entries without using previous ones
}
function getCaloriesFromInputs(list) {
let calories = 0;
for (let i = 0; i < list.length; i++) {
const currVal = cleanInputString(list[i].value);
const invalidInputMatch = isInvalidInput(currVal);
if (invalidInputMatch) {
alert(`Invalid Input: ${invalidInputMatch[0]}`);
isError = true;
return null;
}
calories += Number(currVal);
}
return calories;
}
function calculateCalories(e) {
e.preventDefault();
isError = false;
const breakfastNumberInputs = document.querySelectorAll("#breakfast input[type=number]");
const lunchNumberInputs = document.querySelectorAll("#lunch input[type=number]");
const dinnerNumberInputs = document.querySelectorAll("#dinner input[type=number]");
const snacksNumberInputs = document.querySelectorAll("#snacks input[type=number]");
const exerciseNumberInputs = document.querySelectorAll("#exercise input[type=number]");
const breakfastCalories = getCaloriesFromInputs(breakfastNumberInputs);
const lunchCalories=getCaloriesFromInputs(lunchNumberInputs);
const dinnerCalories=getCaloriesFromInputs(dinnerNumberInputs);
const snacksCalories=getCaloriesFromInputs(snacksNumberInputs);
const exerciseCalories=getCaloriesFromInputs(exerciseNumberInputs);
const budgetCalories=getCaloriesFromInputs([budgetNumberInput]);
if(isError){return ;}
const consumedCalories=breakfastCalories+lunchCalories+snacksCalories+dinnerCalories;
const remainingCalories=budgetCalories-consumedCalories+exerciseCalories;
const surplusOrDeficit=(remainingCalories>=0)?"Surplus":"Deficit";
output.innerHTML = `
<span class="${surplusOrDeficit.toLowerCase()}">${Math.abs(remainingCalories)} Calorie ${surplusOrDeficit}</span>
<hr>
<p>${budgetCalories} Calories Budgeted</p>
<p>${consumedCalories} Calories Consumed</p>
<p>${exerciseCalories} Calories Burned</p>
`;
output.classList.remove("hide");
}
function clearForm(){
const inputContainers=Array.from(document.querySelectorAll("input-container"));
for (let i = 0; i < inputContainers.length; i++) {
inputContainers[i].innerHTML="";
}
budgetNumberInput.value="";
output.innerText="";
output.classList.add("hide");
}
addEntryButton.addEventListener("click", addEntry);
calorieCounter.addEventListener("submit",calculateCalories);
clearButton.addEventListener("click",clearForm);