@seroh/roll/dist/randomizer/Randomizer.js

An RPG dice-rolling library with a variety of built-in roll mechanics.

export class Randomizer {
    generate(min, max) {
        this.validateMinMax(min, max);
        return this.scaleToRange(this.generator(), min, max);
    }
    scaleToRange(rawRoll, min, max) {
        if (rawRoll >= 0.99)
            return max;
        if (rawRoll <= 0)
            return min;
        return Math.floor(rawRoll * (max - min + 1)) + min;
    }
    validateMinMax(min, max) {
        if (!Number.isInteger(min) || !Number.isInteger(max)) {
            throw new Error(`Invalid range: Both minimum (${min}) and maximum (${max}) values must be integers.`);
        }
        if (min < 1 || max < 1) {
            throw new Error(`Invalid range: Both minimum (${min}) and maximum (${max}) values must be positive integers greater than zero.`);
        }
        if (min > max) {
            throw new Error(`Invalid range: The minimum value (${min}) cannot be greater than the maximum value (${max}).`);
        }
    }
}
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