server/project/src/helpers/ProbabilityHelper.ts

import { inject, injectable } from "tsyringe";

import { ILogger } from "@spt-aki/models/spt/utils/ILogger";
import { RandomUtil } from "@spt-aki/utils/RandomUtil";

@injectable()
export class ProbabilityHelper
{
    constructor(
        @inject("WinstonLogger") protected logger: ILogger,
        @inject("RandomUtil") protected randomUtil: RandomUtil,
    )
    {}

    /**
     * Chance to roll a number out of 100
     * @param chance Percentage chance roll should success
     * @param scale scale of chance to allow support of numbers > 1-100
     * @returns true if success
     */
    public rollChance(chance: number, scale = 1): boolean
    {
        return (this.randomUtil.getInt(1, 100 * scale) / (1 * scale)) <= chance;
    }
}