function _patchConsoleWith()

in src/LogPatch.js [150:202]
52 lines of code
6 McCabe index (conditional complexity)

function _patchConsoleWith(log) {
  const NopLog = (_message, ..._params) => {};
  const levels = Object.freeze({
    TRACE: { name: 'TRACE', priority: 1, tlvMask: 0b00100 },
    DEBUG: { name: 'DEBUG', priority: 2, tlvMask: 0b01000 },
    INFO: { name: 'INFO', priority: 3, tlvMask: 0b01100 },
    WARN: { name: 'WARN', priority: 4, tlvMask: 0b10000 },
    ERROR: { name: 'ERROR', priority: 5, tlvMask: 0b10100 },
    FATAL: { name: 'FATAL', priority: 6, tlvMask: 0b11000 },
  });
  let awsLambdaLogLevel =
    levels[process.env['AWS_LAMBDA_LOG_LEVEL']?.toUpperCase()] ?? levels.TRACE;

  if (levels.TRACE.priority >= awsLambdaLogLevel.priority) {
    console.trace = (msg, ...params) => {
      log(levels.TRACE, msg, ...params);
    };
  } else {
    console.trace = NopLog;
  }
  if (levels.DEBUG.priority >= awsLambdaLogLevel.priority) {
    console.debug = (msg, ...params) => {
      log(levels.DEBUG, msg, ...params);
    };
  } else {
    console.debug = NopLog;
  }
  if (levels.INFO.priority >= awsLambdaLogLevel.priority) {
    console.info = (msg, ...params) => {
      log(levels.INFO, msg, ...params);
    };
  } else {
    console.info = NopLog;
  }
  console.log = console.info;
  if (levels.WARN.priority >= awsLambdaLogLevel.priority) {
    console.warn = (msg, ...params) => {
      log(levels.WARN, msg, ...params);
    };
  } else {
    console.warn = NopLog;
  }
  if (levels.ERROR.priority >= awsLambdaLogLevel.priority) {
    console.error = (msg, ...params) => {
      log(levels.ERROR, msg, ...params);
    };
  } else {
    console.error = NopLog;
  }
  console.fatal = (msg, ...params) => {
    log(levels.FATAL, msg, ...params);
  };
}