params.js

"use strict";

/*
 * Copyright (C) 2025 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
*/


class Params {
    // Enable a detailed developer menu to change the current Params.
    developerMode = false;
    startAutomatically = false;
    shouldReport = false;
    startDelay = undefined;

    testList = [];
    testIterationCount = undefined;
    testWorstCaseCount = undefined;
    prefetchResources = true;

    RAMification = false;
    dumpJSONResults = false;
    testIterationCountMap = new Map();
    testWorstCaseCountMap = new Map();

    customPreIterationCode = undefined;
    customPostIterationCode = undefined;

    constructor(sourceParams = undefined) {
        if (sourceParams)
            this._copyFromSearchParams(sourceParams);
        if (!this.developerMode)
            Object.freeze(this);
    }

    _copyFromSearchParams(sourceParams) {
        this.startAutomatically = this._parseBooleanParam(sourceParams, "startAutomatically");
        this.developerMode = this._parseBooleanParam(sourceParams, "developerMode");
        this.shouldReport = this._parseBooleanParam(sourceParams, "report");
        this.prefetchResources = this._parseBooleanParam(sourceParams, "prefetchResources");
        this.RAMification = this._parseBooleanParam(sourceParams, "RAMification");
        this.dumpJSONResults = this._parseBooleanParam(sourceParams, "dumpJSONResults");

        this.customPreIterationCode = this._parseStringParam(sourceParams, "customPreIterationCode");
        this.customPostIterationCode = this._parseStringParam(sourceParams, "customPostIterationCode");

         this.startDelay = this._parseIntParam(sourceParams, "startDelay", 0);
        if (this.shouldReport && !this.startDelay)
            this.startDelay = 4000;

        for (const paramKey of ["tag", "tags", "test", "tests"])
          this.testList = this._parseTestListParam(sourceParams, paramKey);

        this.testIterationCount = this._parseIntParam(sourceParams, "iterationCount", 1);
        this.testWorstCaseCount = this._parseIntParam(sourceParams, "worstCaseCount", 1);

        const unused = Array.from(sourceParams.keys());
        if (unused.length > 0)
            console.error("Got unused source params", unused);
    }

    _parseTestListParam(sourceParams, key) {
        if (!sourceParams.has(key))
          return this.testList;
        let testList = [];
        if (sourceParams?.getAll) {
          testList = sourceParams?.getAll(key);
        } else {
          // fallback for cli sourceParams which is just a Map;
          testList = sourceParams.get(key).split(",");
        }
        sourceParams.delete(key);
        if (this.testList.length > 0 && testList.length > 0)
            throw new Error(`Overriding previous testList='${this.testList.join()}' with ${key} url-parameter.`);
        return testList;
    }

    _parseStringParam(sourceParams, paramKey) {
        if (!sourceParams.has(paramKey))
            return DefaultJetStreamParams[paramKey];
        const value = sourceParams.get(paramKey);
        sourceParams.delete(paramKey);
        return value;
    }

    _parseBooleanParam(sourceParams, paramKey) {
        if (!sourceParams.has(paramKey))
            return DefaultJetStreamParams[paramKey];
        const value = sourceParams.get(paramKey).toLowerCase();
        sourceParams.delete(paramKey);
        return !(value === "false" || value === "0");
    }

    _parseIntParam(sourceParams, paramKey, minValue) {
        if (!sourceParams.has(paramKey))
            return DefaultJetStreamParams[paramKey];

        const parsedValue = this._parseInt(sourceParams.get(paramKey), paramKey);
        if (parsedValue < minValue)
            throw new Error(`Invalid ${paramKey} param: '${parsedValue}', value must be >= ${minValue}.`);
        sourceParams.delete(paramKey);
        return parsedValue;
    }

    _parseInt(value, errorMessage) {
        const number = Number(value);
        if (!Number.isInteger(number) && errorMessage)
            throw new Error(`Invalid ${errorMessage} param: '${value}', expected int.`);
        return parseInt(number);
    }

    get isDefault() {
      return this === DefaultJetStreamParams;
    }
}

const DefaultJetStreamParams = new Params();
let maybeCustomParams = DefaultJetStreamParams;
if (globalThis?.JetStreamParamsSource) {
    try {
        maybeCustomParams = new Params(globalThis?.JetStreamParamsSource);
    } catch (e) {
        console.error("Invalid Params", e, "\nUsing defaults as fallback:", maybeCustomParams);
    }
}
const JetStreamParams = maybeCustomParams;