private IEnumerable <Impl.Command> CreateCommands(
IControllerTag controllerTag,
Controller controller,
Tag userDefinedInterfaceTag,
ITagListener tagListener)
{
var commandsTag = controller.FindTag(TagName.CmdList(parent: null), userDefinedInterfaceTag);
if (commandsTag != null)
{
Tag modeTag = null;
Tag commandTag = null;
// assuming that the job interface is defined in the parent tag of the commandsTag
var jobTag = commandsTag.Parent;
// get the mode tag
modeTag = controller.FindTag(TagName.Mode(parent: null), jobTag);
commandTag = controller.FindTag(TagName.ManualCommand(parent: null), jobTag);
if (jobTag.NestedName != TagName.Job(parent: null) ||
modeTag == null || commandTag == null)
{
throw new InvalidOperationException(new StringBuilder()
.AppendFormat("The {0} is not defined inside a {1} structure for the controller {2} or ",
TagName.CmdList(parent: null),
TagName.Job(parent: null),
controller.Name)
.AppendFormat("the {0} or {1} was not defined in the {2} structure. ",
TagName.Mode(parent: null),
TagName.ManualCommand(parent: null),
TagName.Job(parent: null))
.AppendLine()
.AppendFormat("Set the {0} as a subelement of a valid {1} structure.",
commandsTag.Name, TagName.Job(parent: null)).ToString());
}
tagListener.ReadTagSynchronously(commandsTag);
var commands = commandsTag.ArrayValues <Command>();
int commandIndex = 0;
if (commands.Any(c => c == null))
{
throw new InvalidOperationException(new StringBuilder()
.AppendFormat("The commands {0} of the controller {1} could not be read. ",
commandsTag.Name,
controller.Name)
.AppendLine()
.AppendFormat("Expected array datatype {0}.", CmdList.PlcArrayDataType())
.AppendLine()
.AppendFormat("Current array datatype {0}.", commandsTag.DataType).ToString());
}
foreach (Command command in commands.Where(c => c != null && !c.Name.IsNullOrEmpty()))
{
Tag tag = controller.FindTag(TagName.CmdList(null, commandIndex), commandsTag);
if (tag == null)
{
continue;
}
var commandImpl = new Impl.Command(controller, command, tag.Childs.ToReadOnly(), modeTag, commandTag);
yield return(commandImpl);
commandIndex++;
}
// remove CmdListArray-Tag in order to prevent that the same tags exists more
// than once --> For example the tag "bolAvailable"
jobTag.Childs.Remove(commandsTag);
}
}