function evaluateFunctionParameters()

in datawig-js/static/jspsych-6.1.0/jspsych.js [877:917]
37 lines of code
18 McCabe index (conditional complexity)

  function evaluateFunctionParameters(trial){

    // first, eval the trial type if it is a function
    // this lets users set the plugin type with a function
    if(typeof trial.type === 'function'){
      trial.type = trial.type.call();
    }

    // now eval the whole trial

    // start by getting a list of the parameters
    var keys = Object.keys(trial);

    // iterate over each parameter
    for (var i = 0; i < keys.length; i++) {
      // check to make sure parameter is not "type", since that was eval'd above.
      if(keys[i] !== 'type'){
        // this if statement is checking to see if the parameter type is expected to be a function, in which case we should NOT evaluate it.
        // the first line checks if the parameter is defined in the universalPluginParameters set
        // the second line checks the plugin-specific parameters
        if(
          (typeof jsPsych.plugins.universalPluginParameters[keys[i]] !== 'undefined' && jsPsych.plugins.universalPluginParameters[keys[i]].type !== jsPsych.plugins.parameterType.FUNCTION ) ||
          (typeof jsPsych.plugins[trial.type].info.parameters[keys[i]] !== 'undefined' && jsPsych.plugins[trial.type].info.parameters[keys[i]].type !== jsPsych.plugins.parameterType.FUNCTION)
        ) {
          if (typeof trial[keys[i]] == "function") {
            trial[keys[i]] = trial[keys[i]].call();
          }
        }
      }
      // add a special exception for the data parameter so we can evaluate functions. eventually this could be generalized so that any COMPLEX object type could
      // be evaluated at the individual parameter level.
      if(keys[i] == 'data'){
        var data_params = Object.keys(trial[keys[i]]);
        for(var j=0; j<data_params.length; j++){
          if(typeof trial[keys[i]][data_params[j]] == "function") {
            trial[keys[i]][data_params[j]] = trial[keys[i]][data_params[j]].call();
          }
        }
      }
    }
  }