export function log()

in src/util/log.ts [38:95]
34 lines of code
10 McCabe index (conditional complexity)

export function log(eventName: string, data?: any) {
  data = data || {};

  // let LOG_ENDPOINT = "https://clarence.eecs.berkeley.edu";

  // Prepare log data.
  let postData: any = {
    timestamp: new Date().toISOString(),
    event: eventName,
    data: data,
    tag: undefined
  };

  if (_settingRegistry != undefined || _settingRegistry != null) {
    _settingRegistry
      .get("nbgather:plugin", "enableLogging")
      .then(loggingEnabled => {
        if (
          typeof loggingEnabled.composite === "boolean" &&
          loggingEnabled.composite
        ) {
          _settingRegistry.get("nbgather:plugin", "loggingTag").then(tag => {
            if (typeof tag.composite === "string") {
              postData.tag = tag.composite as string;

              // Poll for additional data from each state poller.
              for (let poller of _statePollers) {
                let pollData = poller.poll();
                for (let k in pollData) {
                  if (pollData.hasOwnProperty(k)) {
                    postData[k] = pollData[k];
                  }
                }
              }

              // If there is any sensitive data to be logged, it should first be cleaned through a
              // `toJSON` method defined on a class, or manually before passing it into this method.
              // Earlier, we used the replacer argument to JSON.stringify, but it takes too much time
              // to apply replacers to every value in the resulting JSON.
              postData.data = JSON.stringify(postData.data);

              // Submit data to logger endpoint.
              // Disabled in the near term, until a new server is launched.
              /*
              $.ajax(LOG_ENDPOINT + "/log", {
                data: postData,
                method: "POST",
                error: (_: any, textStatus: string, errorThrown: string) => {
                  console.error("Failed to log", textStatus, errorThrown);
                }
              });
              */
            }
          });
        }
      });
  }
}