Add Recipient, Reassign Recipient, or Recall Message

using System.Collections.Generic;
using System.Text;
using PNMsoft.Sequence;
using PNMsoft.Sequence.Expressions;
using PNMsoft.Sequence.Forms.Activities;
using PNMsoft.Sequence.Messaging;

namespace SequenceEx.Tasks.Samples
{
 public class TaskActivityExecutorExample
 {
 public static void SendTask(ActivityInstance activityInstance, string subject, string body, IEnumerable<Recipient> recipients)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 Task task = executor.CreateTask();
 
 if (!string.IsNullOrEmpty(subject))
 {
 task.Subject = SqExpression.Object(EscapeExpressionString(subject));
 }
 if (!string.IsNullOrEmpty(body))
 {
 task.Body = SqExpression.Object(EscapeExpressionString(body));
 }
 
 
 task.Recipients.Clear();
 
 RecipientSet set = new RecipientSet();
 foreach (Recipient recipient in recipients)
 {
 set.Recipients.Add(recipient);
 }
 
 task.Recipients.Add(set);
 
 
 executor.SendTask(task);
 }
 
 public static void SendTask(ActivityInstance activityInstance, IEnumerable<Recipient> recipients)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 executor.SendTask(recipients);
 }
 
 
 public static void RecallTask(ActivityInstance activityInstance, IEnumerable<Recipient> recipients)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 executor.RecallTask(recipients);
 }
 
 
 public static void ReassignTask(ActivityInstance activityInstance, IEnumerable<Recipient> fromRecipients, IEnumerable<Recipient> toRecipients)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 executor.ReassignTask(fromRecipients, toRecipients);
 }
 
 public static void ReassignTask(ActivityInstance activityInstance, IEnumerable<Recipient> fromRecipients, string subject, string body, IEnumerable<Recipient> toRecipients)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 Task task = executor.CreateTask();
 
 if (!string.IsNullOrEmpty(subject))
 {
 task.Subject = SqExpression.Object(EscapeExpressionString(subject));
 }
 if (!string.IsNullOrEmpty(body))
 {
 task.Body = SqExpression.Object(EscapeExpressionString(body));
 }
 
 
 task.Recipients.Clear();
 
 RecipientSet set = new RecipientSet();
 foreach (Recipient recipient in toRecipients)
 {
 set.Recipients.Add(recipient);
 }
 
 task.Recipients.Add(set);
 
 executor.ReassignTask(fromRecipients, task);
 }
 
 public static Task CreateTask(ActivityInstance activityInstance)
 {
 TaskActivityExecutor executor = new TaskActivityExecutor(activityInstance);
 return executor.CreateTask();
 }
 
 private static string EscapeExpressionString(string text)
 {
 if (string.IsNullOrEmpty(text))
 {
 return string.Empty;
 }
 
 StringBuilder sb = new StringBuilder();
 
 sb.Append('"');
 
 for (int i = 0; i < text.Length; i++)
 {
 char ch = text[i];
 
 if (ch == '"')
 {
 sb.Append('"');
 }
 
 sb.Append(ch);
 }
 
 sb.Append('"');
 
 return sb.ToString();
 }
 }
}