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Build a script for food allergy alerts

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Computer Science

Sure! Here’s a script idea that could be used to trigger food allergy alerts. It could be implemented in a variety of ways depending on the platform or application. Below is a simple script for a web application, using JavaScript for client-side validation, which checks if a user’s food allergies match with ingredients in a food product.

Script for Food Allergy Alerts (JavaScript)

javascript
// Sample food items and their ingredients
const foodItems = [
  {
    name: "Peanut Butter Sandwich",
    ingredients: ["bread", "peanut", "butter", "jam"],
  },
  {
    name: "Cheese Pizza",
    ingredients: ["cheese", "flour", "tomato", "yeast", "olive oil"],
  },
  {
    name: "Chicken Salad",
    ingredients: ["chicken", "lettuce", "olive oil", "avocado", "walnuts"],
  },
  {
    name: "Fruit Salad",
    ingredients: ["apple", "banana", "grape", "orange", "melon"],
  },
];

// List of allergens
const allergens = ["peanut", "dairy", "gluten", "walnut", "soy"];

// Function to check for allergens
function checkAllergies(selectedFood, allergies) {
  const food = foodItems.find((item) => item.name === selectedFood);
  if (!food) {
    return "Food item not found.";
  }

  const allergensFound = food.ingredients.filter((ingredient) =>
    allergies.some((allergy) => ingredient.toLowerCase().includes(allergy))
  );

  if (allergensFound.length > 0) {
    return `Warning: This food contains allergens: ${allergensFound.join(", ")}`;
  } else {
    return "This food item does not contain any of your listed allergens.";
  }
}

// Function to trigger the allergy alert based on user input
function triggerAllergyAlert() {
  const selectedFood = document.getElementById("foodDropdown").value;
  const userAllergies = getUserAllergies(); // Assume this is a function that fetches the user's allergies

  const alertMessage = checkAllergies(selectedFood, userAllergies);

  // Displaying alert message
  alert(alertMessage);
}

// Simulate getting user's allergy list (could be from a database or input form)
function getUserAllergies() {
  return ["peanut", "dairy"];  // Example: user is allergic to peanut and dairy
}

// Adding event listener to the "Check Allergies" button
document.getElementById("checkButton").addEventListener("click", triggerAllergyAlert);

HTML Structure for the Webpage

html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Food Allergy Alert</title>
</head>
<body>
  <h1>Food Allergy Checker</h1>
  
  <label for="foodDropdown">Select Food Item:</label>
  <select id="foodDropdown">
    <option value="Peanut Butter Sandwich">Peanut Butter Sandwich</option>
    <option value="Cheese Pizza">Cheese Pizza</option>
    <option value="Chicken Salad">Chicken Salad</option>
    <option value="Fruit Salad">Fruit Salad</option>
  </select>
  
  <button id="checkButton">Check Allergies</button>

  <script src="path_to_your_script.js"></script>
</body>
</html>

How It Works:

The JavaScript script stores a list of food items and their ingredients.
The checkAllergies function compares the user’s allergies with the food item ingredients and alerts the user if any allergens are found.
When the user selects a food item from a dropdown menu and clicks “Check Allergies,” the script will check if any allergens from their profile are present in the selected food.

This basic script can be expanded to include more food items, more detailed user allergy profiles, and even integrate with backend systems if required. Let me know if you want to go deeper into any specific part!

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