/// <summary>
/// Adds a workflow variable to the TriggerParam variables collection.
/// </summary>
/// <typeparam name="TVariable"></typeparam>
/// <param name="triggerParam"></param>
/// <param name="value"></param>
/// <returns></returns>
public static TriggerParam AddVariableWithKey <TVariable>(
this TriggerParam triggerParam,
WorkflowVariableBase value
)
{
return(triggerParam.AddVariable(KeyBuilder.ToKey(typeof(TVariable)), value));
}
/// <summary>
/// Returns the workflow variable from the TransitionContext.
/// </summary>
/// <typeparam name="TVariable"></typeparam>
/// <param name="transitionContext"></param>
/// <returns></returns>
public static TVariable ReturnVariable <TVariable>(
this TransitionContext transitionContext
) where TVariable : WorkflowVariableBase
{
return(transitionContext.GetVariable <TVariable>(
KeyBuilder.ToKey(typeof(TVariable))
));
}
internal static WorkflowVariable Create(Workflow workflow, WorkflowVariableBase variable)
{
return(new WorkflowVariable
{
WorkflowId = workflow.Id,
Workflow = workflow,
Type = KeyBuilder.ToKey(variable.GetType()),
Content = JsonConvert.SerializeObject(variable)
});
}
internal void AddVariable(WorkflowVariableBase variable)
{
var type = KeyBuilder.ToKey(variable.GetType());
var existing = this.WorkflowVariables.FirstOrDefault(v => v.Type == type);
if (existing != null)
{
existing.UpdateContent(variable);
return;
}
this.WorkflowVariables.Add(WorkflowVariable.Create(this, variable));
}
private void EnsureWorkflowVariables(Workflow workflow, TriggerParam param)
{
if (workflow.WorkflowVariables.Count > 0)
{
foreach (var workflowVariable in workflow.WorkflowVariables)
{
var type = KeyBuilder.FromKey(workflowVariable.Type);
var variable = JsonConvert.DeserializeObject(workflowVariable.Content, type);
var workflowVariableBase = variable as WorkflowVariableBase;
if (workflowVariableBase != null)
{
var key = KeyBuilder.ToKey(type);
if (param.Variables.ContainsKey(key))
{
param.Variables[key] = variable as WorkflowVariableBase;
}
else
{
param.Variables.Add(key, variable as WorkflowVariableBase);
}
}
}
}
}
/// <summary>
/// Checks whether the workflow variable is present in the TransitionContext.
/// </summary>
/// <typeparam name="TVariable"></typeparam>
/// <param name="transitionContext"></param>
/// <returns></returns>
public static bool HasVariable <TVariable>(
this TransitionContext transitionContext
)
{
return(transitionContext.ContainsKey(KeyBuilder.ToKey(typeof(TVariable))));
}