osu-api-extended/dist/tools/net-pp.js

Advanced osu! api wrapper for v1 and v2, with extra stuff

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.calculate_net_pp = void 0;
const handleErrors_1 = require("../utility/handleErrors");
const calculate_net_pp = (params) => {
    if (!Array.isArray(params.scores)) {
        return (0, handleErrors_1.handleErrors)(`Provide array of scores or numbers`);
    }
    ;
    if (!isFinite(params.pp_value) || params.pp_value == null) {
        return (0, handleErrors_1.handleErrors)(`Specify pp`);
    }
    ;
    const pp_values = typeof params.scores[0] == 'number' ? params.scores : params.scores.map(r => r.pp);
    pp_values.sort((a, b) => b - a);
    // weight the user's current scores. (see https://osu.ppy.sh/wiki/en/Performance_points/Weighting_system)
    const weighted_before = pp_values.slice(0, 100).map((x, i) => x * Math.pow(0.95, i));
    // sum up the total pp value of the user's current scores.
    const total_pp_old = weighted_before.reduce((a, b) => a + b, 0);
    if (params.pp_value < Math.min(pp_values[pp_values.length - 1]))
        return {
            pp: 0,
            totalNow: total_pp_old,
            totalBefore: total_pp_old,
        };
    // Push new pp_value
    pp_values.push(params.pp_value);
    pp_values.sort((a, b) => b - a);
    // weight the new scores. (see https://osu.ppy.sh/wiki/en/Performance_points/Weighting_system)
    const weighted_after = pp_values.slice(0, 100).map((x, i) => x * Math.pow(0.95, i));
    // sum up the total pp value of the user's new simulated scores.
    const total_pp_new = weighted_after.reduce((a, b) => a + b, 0);
    return {
        pp: total_pp_new - total_pp_old,
        totalNow: total_pp_new,
        totalBefore: total_pp_old,
    };
};
exports.calculate_net_pp = calculate_net_pp;