constructor()

in Library/Config.ts [68:104]
33 lines of code
24 McCabe index (conditional complexity)

    constructor(setupString?: string) {
        // Load config values from env variables and JSON if available
        this._mergeConfig();
        const connectionStringEnv: string | undefined = this._connectionString;
        const csCode = ConnectionStringParser.parse(setupString);
        const csEnv = ConnectionStringParser.parse(connectionStringEnv);
        const iKeyCode = !csCode.instrumentationkey && Object.keys(csCode).length > 0
            ? null // CS was valid but instrumentation key was not provided, null and grab from env var
            : setupString; // CS was invalid, so it must be an ikey

        this.instrumentationKey = csCode.instrumentationkey || iKeyCode /* === instrumentationKey */ || csEnv.instrumentationkey || Config._getInstrumentationKey();
        this.endpointUrl = `${this.endpointUrl || csCode.ingestionendpoint || csEnv.ingestionendpoint || this._endpointBase}/v2.1/track`;
        this.maxBatchSize = this.maxBatchSize || 250;
        this.maxBatchIntervalMs = this.maxBatchIntervalMs || 15000;
        this.disableAppInsights = this.disableAppInsights || false;
        this.samplingPercentage = this.samplingPercentage || 100;
        this.correlationIdRetryIntervalMs = this.correlationIdRetryIntervalMs || 30 * 1000;
        this.correlationHeaderExcludedDomains =
            this.correlationHeaderExcludedDomains ||
            [
                "*.core.windows.net",
                "*.core.chinacloudapi.cn",
                "*.core.cloudapi.de",
                "*.core.usgovcloudapi.net",
                "*.core.microsoft.scloud",
                "*.core.eaglex.ic.gov"
            ];

        this._setCorrelationId = (correlationId) => this.correlationId = correlationId;
        this.ignoreLegacyHeaders = this.ignoreLegacyHeaders || false;
        this.profileQueryEndpoint = csCode.ingestionendpoint || csEnv.ingestionendpoint || process.env[Config.ENV_profileQueryEndpoint] || this._endpointBase;
        this.quickPulseHost = this.quickPulseHost || csCode.liveendpoint || csEnv.liveendpoint || process.env[Config.ENV_quickPulseHost] || Constants.DEFAULT_LIVEMETRICS_HOST;
        // Parse quickPulseHost if it starts with http(s)://
        if (this.quickPulseHost.match(/^https?:\/\//)) {
            this.quickPulseHost = new url.URL(this.quickPulseHost).host;
        }
    }