public async Task <InteractionResult> ExecuteAsync(InteractConfig config, NameValueCollection inputs = null, string target = null)
{
var targets = config.Targets;
if (string.IsNullOrEmpty(target))
{
target = config.DefaultTarget;
}
if (string.IsNullOrEmpty(target))
{
throw new Exception("No target is specified.");
}
var entranceTarget = targets.FirstOrDefault(t => t.Name.Equals(target, StringComparison.OrdinalIgnoreCase));
if (entranceTarget == null)
{
throw new Exception("target cannot be found:" + target);
}
var context = new InterationContext();
context.Inputs = inputs;
context.WebAccessor = this.serviceProvider.GetService <IWebAccessor>();
return(await ExecuteTargetAsync(entranceTarget, context, targets));
}
protected string GetValue(InterationContext context, string property)
{
if (property.StartsWith("$(") && property.EndsWith(")"))
{
var inputPropertyName = property.Substring(1, property.Length - 3);
return(GetInputValue(context.Inputs, inputPropertyName));
}
if (property.StartsWith("${") && property.EndsWith("}"))
{
var outputPropertyName = property.Substring(1, property.Length - 3);
return(GetOutputValue(context.Outputs, outputPropertyName));
}
return(string.Empty);
}
protected string PrepareValue(InterationContext context, string value)
{
if (string.IsNullOrEmpty(value))
{
return(string.Empty);
}
while (true)
{
var pos = value.IndexOf("${");
var endPos = -1;
if (pos >= 0)
{
endPos = value.IndexOf("}", pos);
if (endPos >= 0)
{
var outputPropertyName = value.Substring(pos, endPos - pos - 2);
value = value.Substring(0, pos) + GetOutputValue(context.Outputs, outputPropertyName) + value.Substring(endPos + 1);
continue;
}
}
pos = value.IndexOf("$(");
if (pos >= 0)
{
endPos = value.IndexOf(")", pos);
if (endPos >= 0)
{
var inputPropertyName = value.Substring(pos, endPos - pos - 2);
value = value.Substring(0, pos) + GetOutputValue(context.Inputs, inputPropertyName) + value.Substring(endPos + 1);
continue;
}
}
break;
}
return(value);
}
public abstract Task <InteractionResult> ExecuteAsync(InterationContext context);
private async Task <InteractionResult> ExecuteTargetAsync(TargetConfig target, InterationContext context, TargetConfig[] allTargets)
{
var actions = target.Actions.Select(x => x.GetAction());
var lastResult = default(InteractionResult);
foreach (var action in actions)
{
var result = lastResult = await action.ExecuteAsync(context);
if (!result.Ok)
{
break;
}
if (string.IsNullOrEmpty(result.Target))
{
continue;
}
var callTarget = allTargets.FirstOrDefault(t => t.Name.Equals(result.Target, StringComparison.OrdinalIgnoreCase));
if (callTarget == null)
{
throw new Exception("callTarget cannot be found:" + result.Target);
}
result = lastResult = await ExecuteTargetAsync(callTarget, context, allTargets);
if (!result.Ok)
{
break;
}
}
lastResult.Outputs = context.Outputs;
return(lastResult);
}
