wilks/dist/helpers.js

Calculate wilks score, dots, one rep max and more. Wilks formula and Dots are primarily used in powerlifting contests to identify the best lifter across different weight classes.

import { coefficients } from "./constants.js";
export function roundToDecimal(input, decimal) {
    const factor = Math.pow(10, decimal);
    return Math.round(input * factor) / factor;
}
export function convertWeight(weight, unit, decimal = 1) {
    return roundToDecimal(unit === "lb" ? weight * 0.45359237 : weight, decimal);
}
export function getTotal(input) {
    if ("total" in input)
        return input.total;
    return Object.values(input).reduce((a, b) => a + b, 0);
}
;
export function calculateCoefficient(input, formula) {
    const { gender, bodyweight, unit } = input;
    const coefficient = coefficients[formula][gender];
    const bw = convertWeight(bodyweight, unit);
    return coefficient.reduce((acc, curr, idx) => {
        return idx === 0
            ? acc + curr
            : acc + (curr * Math.pow(bw, idx));
    }, 0);
}
export function validateInput(input) {
    const { bodyweight, gender, unit, total, squat, bench, deadlift } = input;
    const errors = [];
    const isValidNumber = (value) => typeof value === "number" && value > 0;
    const isValidGender = (g) => g === "male" || g === "female";
    const isValidUnit = (u) => u === "kg" || u === "lb";
    if (!isValidNumber(bodyweight)) {
        errors.push("Bodyweight must be a number greater than 0.");
    }
    if (!isValidGender(gender)) {
        errors.push("Gender must be either 'male' or 'female'.");
    }
    if (!isValidUnit(unit)) {
        errors.push("Unit must be either 'kg' or 'lb'.");
    }
    const hasTotal = typeof total === "number";
    const hasLifts = squat !== undefined || bench !== undefined || deadlift !== undefined;
    if (hasTotal && hasLifts) {
        errors.push("Use either total or squat/bench/deadlift, not both.");
    }
    if (hasTotal && !isValidNumber(total)) {
        errors.push("Invalid total. Use a number greater than 0.");
    }
    if (!hasTotal) {
        if (!isValidNumber(squat))
            errors.push("Invalid squat. Use a number greater than 0.");
        if (!isValidNumber(bench))
            errors.push("Invalid bench. Use a number greater than 0.");
        if (!isValidNumber(deadlift))
            errors.push("Invalid deadlift. Use a number greater than 0.");
    }
    if (errors.length) {
        throw new TypeError(errors.join(" "));
    }
}
export function validateCompetition(competition) {
    const validCompetitions = ["clpl", "clbp", "eqpl", "eqbp"];
    if (typeof competition !== "string" || !validCompetitions.includes(competition)) {
        throw new TypeError("Please enter valid competition (\"clpl\", \"clbp\", \"eqpl\", \"eqbp\")");
    }
}
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