private async Task <JObject> GetDataObject(ISkraprWorker worker)
{
var result = new JObject();
foreach (var gatherProperty in Gather.Properties())
{
var propertyName = gatherProperty.Name;
bool awaitPromise = false;
string gatherScript = null;
switch (gatherProperty.Value.Type)
{
case JTokenType.String:
gatherScript = gatherProperty.Value.Value <string>();
break;
case JTokenType.Object:
//TODO: Implement this -- objects can specify additional settings.
throw new NotImplementedException("Objects are not yet supported.");
default:
throw new InvalidOperationException($"Unknown or invalid value for gather property {propertyName}: {gatherProperty.Value.Type}");
}
if (String.IsNullOrWhiteSpace(gatherScript))
{
throw new InvalidOperationException($"A gather script must be specified for property {propertyName}");
}
var fnGatherScript = $@"(function() {{
'use strict';
var result = {gatherScript}
return JSON.stringify({{ result }});
}})();";
var evaluateResponse = await worker.Session.Runtime.Evaluate(new Runtime.EvaluateCommand
{
AwaitPromise = awaitPromise,
Expression = fnGatherScript,
IncludeCommandLineAPI = true,
ContextId = worker.DevTools.CurrentFrameContext.Id,
ObjectGroup = "Skrapr"
});
if (evaluateResponse.Result.Subtype == "error")
{
throw new InvalidOperationException($"An error occurred while evaluating script on property '{propertyName}': {evaluateResponse.Result.Description}");
}
var strResult = evaluateResponse.Result.Value as string;
if (strResult == null)
{
throw new InvalidOperationException($"Unable to obtain the gather result for property {propertyName}");
}
var objResult = JToken.Parse(strResult);
result.Add(propertyName, objResult["result"]);
}
return(result);
}
