application planning
This commit is contained in:
Jake Kasper
198
backend/src/utils/applicationCalculations.js
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198
backend/src/utils/applicationCalculations.js
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/**
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* Application Calculation Engine
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* Calculates product amounts, water amounts, and application speeds
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* based on area, product rates, and equipment specifications
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*/
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/**
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* Calculate liquid application requirements
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* @param {number} areaSquareFeet - Area to be treated in square feet
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* @param {number} rateAmount - Product rate amount
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* @param {string} rateUnit - Product rate unit (oz/gal, oz/1000sqft, etc.)
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* @param {Object} equipment - Equipment specifications
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* @param {Object} nozzle - Nozzle specifications (optional)
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* @returns {Object} Calculation results
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*/
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function calculateLiquidApplication(areaSquareFeet, rateAmount, rateUnit, equipment, nozzle) {
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let productOunces = 0;
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let waterGallons = 0;
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let applicationSpeedMph = 3; // Default speed
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const areaAcres = areaSquareFeet / 43560; // Convert to acres
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const area1000sqft = areaSquareFeet / 1000; // Convert to 1000 sq ft units
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console.log(`Calculating liquid application:
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Area: ${areaSquareFeet} sq ft (${areaAcres.toFixed(3)} acres, ${area1000sqft.toFixed(1)} x 1000sqft)
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Rate: ${rateAmount} ${rateUnit}
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Equipment: ${equipment?.categoryName}
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Nozzle GPM: ${nozzle?.flowRateGpm || 'N/A'}`);
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// Calculate product amount based on rate unit
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if (rateUnit.includes('oz/gal')) {
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// Rate is ounces per gallon of spray solution
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// Need to determine gallons of water needed first
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const gallonsPerAcre = 20; // Default 20 GPA for lawn applications
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waterGallons = areaAcres * gallonsPerAcre;
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productOunces = waterGallons * rateAmount;
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} else if (rateUnit.includes('oz/1000sqft') || rateUnit.includes('oz per 1000sqft')) {
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// Rate is ounces per 1000 square feet
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productOunces = area1000sqft * rateAmount;
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// Calculate water needed (typical lawn application is 0.5-1 gallon per 1000 sqft)
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waterGallons = area1000sqft * 0.75; // 0.75 gal per 1000 sqft default
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} else if (rateUnit.includes('oz/acre')) {
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// Rate is ounces per acre
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productOunces = areaAcres * rateAmount;
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waterGallons = areaAcres * 20; // 20 GPA default
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} else if (rateUnit.includes('fl oz/1000sqft') || rateUnit.includes('fl oz per 1000sqft')) {
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// Rate is fluid ounces per 1000 square feet
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productOunces = area1000sqft * rateAmount;
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waterGallons = area1000sqft * 0.75;
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} else {
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// Fallback: assume rate is per 1000 sq ft
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productOunces = area1000sqft * rateAmount;
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waterGallons = area1000sqft * 0.75;
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}
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// Calculate application speed based on equipment and nozzle
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if (equipment && nozzle) {
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const sprayWidthFeet = equipment.sprayWidthFeet || 3; // Default 3 ft width
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const nozzleGpm = nozzle.flowRateGpm || 0.25; // Default 0.25 GPM
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const gallonsPerAcre = (waterGallons / areaAcres) || 20;
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// Speed calculation: MPH = (GPM × 5940) / (Width × GPA)
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// Where 5940 is a conversion constant
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applicationSpeedMph = (nozzleGpm * 5940) / (sprayWidthFeet * gallonsPerAcre);
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// Limit speed to reasonable range (1-8 MPH for lawn applications)
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applicationSpeedMph = Math.max(1, Math.min(8, applicationSpeedMph));
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}
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const result = {
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productAmountOunces: Math.round(productOunces * 100) / 100, // Round to 2 decimals
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waterAmountGallons: Math.round(waterGallons * 100) / 100,
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applicationSpeedMph: Math.round(applicationSpeedMph * 100) / 100,
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gallonsPerAcre: Math.round((waterGallons / areaAcres) * 100) / 100,
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calculationDetails: {
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areaSquareFeet,
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areaAcres: Math.round(areaAcres * 1000) / 1000,
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area1000sqft: Math.round(area1000sqft * 10) / 10,
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rateAmount,
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rateUnit
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}
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};
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console.log('Liquid calculation result:', result);
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return result;
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}
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/**
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* Calculate granular application requirements
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* @param {number} areaSquareFeet - Area to be treated in square feet
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* @param {number} rateAmount - Product rate amount
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* @param {string} rateUnit - Product rate unit (lbs/1000sqft, lbs/acre, etc.)
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* @param {Object} equipment - Equipment specifications
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* @returns {Object} Calculation results
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*/
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function calculateGranularApplication(areaSquareFeet, rateAmount, rateUnit, equipment) {
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let productPounds = 0;
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let applicationSpeedMph = 3; // Default speed
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const areaAcres = areaSquareFeet / 43560;
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const area1000sqft = areaSquareFeet / 1000;
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console.log(`Calculating granular application:
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Area: ${areaSquareFeet} sq ft (${areaAcres.toFixed(3)} acres, ${area1000sqft.toFixed(1)} x 1000sqft)
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Rate: ${rateAmount} ${rateUnit}
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Equipment: ${equipment?.categoryName}`);
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// Calculate product amount based on rate unit
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if (rateUnit.includes('lbs/1000sqft') || rateUnit.includes('lbs per 1000sqft') || rateUnit.includes('lb/1000sqft')) {
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// Rate is pounds per 1000 square feet
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productPounds = area1000sqft * rateAmount;
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} else if (rateUnit.includes('lbs/acre') || rateUnit.includes('lb/acre')) {
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// Rate is pounds per acre
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productPounds = areaAcres * rateAmount;
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} else if (rateUnit.includes('oz/1000sqft') || rateUnit.includes('oz per 1000sqft')) {
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// Rate is ounces per 1000 square feet, convert to pounds
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productPounds = (area1000sqft * rateAmount) / 16; // 16 oz = 1 lb
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} else {
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// Fallback: assume rate is per 1000 sq ft
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productPounds = area1000sqft * rateAmount;
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}
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// Calculate application speed for spreaders
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if (equipment) {
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const spreadWidthFeet = equipment.spreadWidth || equipment.sprayWidthFeet || 3;
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// For granular applications, speed is typically 2-4 MPH
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// This is more dependent on walking/driving speed than flow rate
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applicationSpeedMph = 3; // Standard walking speed for spreader applications
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}
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const result = {
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productAmountPounds: Math.round(productPounds * 100) / 100,
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applicationSpeedMph: Math.round(applicationSpeedMph * 100) / 100,
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calculationDetails: {
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areaSquareFeet,
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areaAcres: Math.round(areaAcres * 1000) / 1000,
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area1000sqft: Math.round(area1000sqft * 10) / 10,
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rateAmount,
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rateUnit
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}
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};
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console.log('Granular calculation result:', result);
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return result;
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}
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/**
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* Main calculation function that determines application type and calls appropriate calculator
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* @param {Object} params - Calculation parameters
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* @returns {Object} Calculation results
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*/
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function calculateApplication(params) {
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const {
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areaSquareFeet,
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rateAmount,
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rateUnit,
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applicationType,
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equipment,
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nozzle
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} = params;
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console.log('Starting application calculation with params:', params);
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if (applicationType === 'liquid') {
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return {
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type: 'liquid',
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...calculateLiquidApplication(areaSquareFeet, rateAmount, rateUnit, equipment, nozzle)
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};
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} else if (applicationType === 'granular') {
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return {
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type: 'granular',
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...calculateGranularApplication(areaSquareFeet, rateAmount, rateUnit, equipment)
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};
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} else {
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// Auto-detect based on rate unit
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const isLiquid = rateUnit.toLowerCase().includes('oz/gal') ||
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rateUnit.toLowerCase().includes('fl oz') ||
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equipment?.categoryName?.toLowerCase() === 'sprayer';
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if (isLiquid) {
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return {
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type: 'liquid',
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...calculateLiquidApplication(areaSquareFeet, rateAmount, rateUnit, equipment, nozzle)
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};
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} else {
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return {
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type: 'granular',
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...calculateGranularApplication(areaSquareFeet, rateAmount, rateUnit, equipment)
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};
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}
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}
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}
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module.exports = {
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calculateApplication,
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calculateLiquidApplication,
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calculateGranularApplication
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};
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@@ -94,13 +94,30 @@ const userProductSchema = Joi.object({
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const applicationPlanSchema = Joi.object({
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lawnSectionId: Joi.number().integer().positive().required(),
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equipmentId: Joi.number().integer().positive().required(),
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nozzleId: Joi.number().integer().positive().optional(),
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plannedDate: Joi.date().required(),
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notes: Joi.string().allow('').optional(),
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areaSquareFeet: Joi.number().positive().optional(),
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equipment: Joi.object({
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id: Joi.number().integer().positive().optional(),
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categoryName: Joi.string().optional(),
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tankSizeGallons: Joi.number().positive().allow(null).optional(),
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pumpGpm: Joi.number().positive().allow(null).optional(),
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sprayWidthFeet: Joi.number().positive().allow(null).optional(),
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capacityLbs: Joi.number().positive().allow(null).optional(),
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spreadWidth: Joi.number().positive().allow(null).optional()
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}).optional(),
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nozzle: Joi.object({
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id: Joi.number().integer().positive().optional(),
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flowRateGpm: Joi.number().positive().allow(null).optional(),
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sprayAngle: Joi.number().integer().allow(null).optional()
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}).allow(null).optional(),
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products: Joi.array().items(Joi.object({
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productId: Joi.number().integer().positive().optional(),
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userProductId: Joi.number().integer().positive().optional(),
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rateAmount: Joi.number().positive().required(),
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rateUnit: Joi.string().max(50).required()
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rateUnit: Joi.string().max(50).required(),
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applicationType: Joi.string().valid('liquid', 'granular').optional()
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})).min(1).required()
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});
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