271 lines
8.8 KiB
JavaScript
271 lines
8.8 KiB
JavaScript
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/**
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* Dog Calorie Calculator - Shared Core Logic
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* This file contains all the business logic, calculations, and configurations
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* that are shared between the iframe and widget versions.
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*
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* By Canine Nutrition and Wellness
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* https://caninenutritionandwellness.com
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*/
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// Core configuration and constants
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const DOG_CALCULATOR_CONFIG = {
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// Dog type factors and labels
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dogTypes: [
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{ value: "3.0", label: "Puppy (0-4 months)" },
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{ value: "2.0", label: "Puppy (4 months - adult)" },
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{ value: "1.2", label: "Adult - inactive/obese" },
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{ value: "1.6", label: "Adult (neutered/spayed) - average activity" },
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{ value: "1.8", label: "Adult (intact) - average activity" },
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{ value: "1.0", label: "Adult - weight loss" },
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{ value: "1.7", label: "Adult - weight gain" },
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{ value: "2.0", label: "Working dog - light work" },
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{ value: "3.0", label: "Working dog - moderate work" },
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{ value: "5.0", label: "Working dog - heavy work" },
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{ value: "1.1", label: "Senior dog" }
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],
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// Energy unit configurations
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energyUnits: [
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{ value: "kcal100g", label: "kcal/100g" },
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{ value: "kcalkg", label: "kcal/kg" },
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{ value: "kcalcup", label: "kcal/cup" },
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{ value: "kcalcan", label: "kcal/can" }
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],
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// Unit options for different measurement systems
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units: {
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metric: [
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{ value: "g", label: "grams (g)" },
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{ value: "kg", label: "kilograms (kg)" },
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{ value: "oz", label: "ounces (oz)" },
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{ value: "lb", label: "pounds (lb)" }
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],
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imperial: [
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{ value: "oz", label: "ounces (oz)" },
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{ value: "lb", label: "pounds (lb)" },
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{ value: "g", label: "grams (g)" },
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{ value: "kg", label: "kilograms (kg)" }
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]
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},
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// Conversion factors
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conversions: {
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lbToKg: 2.20462,
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gToOz: 28.3495,
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gToLb: 453.592,
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gToKg: 1000
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},
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// Energy unit conversion factors to kcal/100g
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energyConversions: {
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kcal100g: 1,
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kcalkg: 0.1, // 1 kg = 10 × 100g
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kcalcup: 0.833, // Assume 1 cup ≈ 120g for dry dog food
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kcalcan: 0.222 // Assume 1 can ≈ 450g for wet dog food
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},
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// Validation limits for energy units
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energyLimits: {
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kcal100g: { min: 1, max: 1000 },
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kcalkg: { min: 10, max: 10000 },
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kcalcup: { min: 50, max: 1000 },
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kcalcan: { min: 100, max: 2000 }
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}
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};
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// Core calculator functions
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const DogCalculatorCore = {
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/**
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* Calculate Resting Energy Requirement (RER)
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* Formula: 70 × (weight in kg)^0.75
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*/
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calculateRER(weightKg) {
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if (!weightKg || weightKg <= 0) return 0;
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return 70 * Math.pow(weightKg, 0.75);
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},
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/**
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* Calculate Maintenance Energy Requirement (MER)
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* Formula: RER × activity factor
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*/
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calculateMER(rer, factor) {
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if (!rer || !factor || factor <= 0) return 0;
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return rer * factor;
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},
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/**
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* Convert weight to kg regardless of input unit
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*/
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convertWeightToKg(weight, isImperial) {
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if (!weight || weight <= 0) return null;
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return isImperial ? weight / DOG_CALCULATOR_CONFIG.conversions.lbToKg : weight;
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},
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/**
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* Convert weight from kg to display unit
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*/
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convertWeightFromKg(weightKg, isImperial) {
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if (!weightKg || weightKg <= 0) return null;
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return isImperial ? weightKg * DOG_CALCULATOR_CONFIG.conversions.lbToKg : weightKg;
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},
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/**
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* Convert food energy to kcal/100g for calculations
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*/
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convertFoodEnergyTo100g(energy, unit) {
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if (!energy || energy <= 0) return null;
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const factor = DOG_CALCULATOR_CONFIG.energyConversions[unit];
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return factor ? energy * factor : energy;
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},
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/**
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* Convert food amounts between units
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*/
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convertUnits(grams, targetUnit) {
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if (!grams || grams <= 0) return 0;
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switch (targetUnit) {
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case 'kg':
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return grams / DOG_CALCULATOR_CONFIG.conversions.gToKg;
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case 'oz':
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return grams / DOG_CALCULATOR_CONFIG.conversions.gToOz;
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case 'lb':
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return grams / DOG_CALCULATOR_CONFIG.conversions.gToLb;
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default:
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return grams;
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}
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},
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/**
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* Calculate daily food amount in grams
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*/
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calculateDailyFoodGrams(merCalories, energyPer100g) {
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if (!merCalories || !energyPer100g || energyPer100g <= 0) return 0;
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return (merCalories / energyPer100g) * 100;
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},
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/**
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* Validate input values
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*/
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validateInput(value, min = 0, isInteger = false) {
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const num = parseFloat(value);
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if (isNaN(num) || num < min) return false;
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if (isInteger && !Number.isInteger(num)) return false;
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return true;
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},
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/**
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* Validate energy input based on unit
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*/
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validateEnergyInput(energy, unit) {
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if (!energy || !unit) return false;
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const limits = DOG_CALCULATOR_CONFIG.energyLimits[unit];
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if (!limits) return false;
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const num = parseFloat(energy);
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return !isNaN(num) && num >= limits.min && num <= limits.max;
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},
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/**
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* Format number for display
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*/
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formatNumber(num, decimals = 0) {
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if (typeof num !== 'number' || isNaN(num)) return '0';
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if (decimals === 0) {
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return Math.round(num).toString();
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}
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return num.toFixed(decimals).replace(/\.?0+$/, '');
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},
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/**
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* Get theme from URL parameters
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*/
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getThemeFromURL() {
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const urlParams = new URLSearchParams(window.location.search);
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const theme = urlParams.get('theme');
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return ['light', 'dark', 'system'].includes(theme) ? theme : 'system';
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},
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/**
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* Get scale from URL parameters
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*/
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getScaleFromURL() {
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const urlParams = new URLSearchParams(window.location.search);
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const scale = parseFloat(urlParams.get('scale'));
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return (!isNaN(scale) && scale >= 0.5 && scale <= 2.0) ? scale : 1.0;
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},
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/**
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* Generate embed codes
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*/
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generateEmbedCodes(baseUrl) {
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const scriptTag = `<script src="${baseUrl}/dog-food-calculator-widget.js"></script>`;
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const divTag = `<div id="dog-calorie-calculator"></div>`;
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const widgetCode = scriptTag + '\n' + divTag;
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const iframeCode = `<iframe src="${baseUrl}/iframe.html" width="100%" height="600" frameborder="0" title="Dog Calorie Calculator"></iframe>`;
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return { widgetCode, iframeCode };
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},
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/**
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* Share URLs for different platforms
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*/
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generateShareUrls(currentUrl) {
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const encodedUrl = encodeURIComponent(currentUrl);
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const text = encodeURIComponent('Check out this useful dog calorie calculator!');
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return {
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facebook: `https://www.facebook.com/sharer/sharer.php?u=${encodedUrl}`,
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twitter: `https://twitter.com/intent/tweet?url=${encodedUrl}&text=${text}`,
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linkedin: `https://www.linkedin.com/sharing/share-offsite/?url=${encodedUrl}`,
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email: `mailto:?subject=${encodeURIComponent('Dog Calorie Calculator')}&body=${encodeURIComponent('Check out this useful dog calorie calculator: ' + currentUrl)}`
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};
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},
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/**
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* Copy text to clipboard with fallback
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*/
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async copyToClipboard(text, button) {
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if (!text || !button) return false;
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try {
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await navigator.clipboard.writeText(text);
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const originalText = button.textContent;
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button.textContent = 'Copied!';
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button.classList.add('copied');
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setTimeout(() => {
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button.textContent = originalText;
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button.classList.remove('copied');
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}, 2000);
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return true;
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} catch (err) {
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// Fallback for older browsers
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try {
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const textArea = document.createElement('textarea');
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textArea.value = text;
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textArea.style.position = 'fixed';
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textArea.style.opacity = '0';
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document.body.appendChild(textArea);
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textArea.select();
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document.execCommand('copy');
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document.body.removeChild(textArea);
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return true;
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} catch (fallbackErr) {
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console.error('Copy to clipboard failed:', fallbackErr);
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return false;
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}
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}
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}
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};
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// Export for different module systems
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if (typeof module !== 'undefined' && module.exports) {
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module.exports = { DOG_CALCULATOR_CONFIG, DogCalculatorCore };
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} else if (typeof window !== 'undefined') {
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window.DOG_CALCULATOR_CONFIG = DOG_CALCULATOR_CONFIG;
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window.DogCalculatorCore = DogCalculatorCore;
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}
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