/// <summary>
/// Work item goals should be structured as
// <Asset_Name>:<Predicate>;<Value>+
// <Asset_Name>:<Predicate>;<Value>+
// etc...
/// </summary>
public static Goal ExtractGoal(this string goalString)
{
const string GoalStateSeparator = "+";
const string PartSeparator = ":;";
const int RequiredNumberOfParts = 3;
Goal newGoal = new Goal();
var goalStates = goalString.Split(GoalStateSeparator.ToCharArray());
foreach (var state in goalStates)
{
var parts = state.Split(PartSeparator.ToCharArray(), 3);
if (parts.Count() < RequiredNumberOfParts) continue;
State goalState = new State
{
Asset = parts[0].Replace('_', ' '),
Predicate = PredicateDeUnderscore(parts[1]),
Value = parts[2].Replace('_', ' ')
};
newGoal.GoalStates.Add(goalState);
}
return newGoal;
}
public void RegisterGoal(Goal goal)
{
// Make sure its not already satisfied
bool satisfied = ValidateGoal(goal);
if (satisfied)
goal.Satisfy();
else
_registeredGoals.Add(goal);
}
/// <summary>
/// Checks if a Goal's states is satisfied by the world state.
/// </summary>
/// <returns>True if all goal states are satisfied</returns>
public bool ValidateGoal(Goal goal)
{
// Find the world states relavent to the goal states
var allStates = _stateService.GetAll();
var relevantStates = allStates
.Where(state => goal.GoalStates.Any(goalstate =>
String.Compare(goalstate.Asset, state.Asset, true) == 0 &&
String.Compare(goalstate.Predicate,state.Predicate, true) == 0));
// For each goal state, compare its existance in the list of total states
foreach (State goalState in goal.GoalStates)
{
// If the goal state is not in the world state
if (!relevantStates.Contains(goalState, _stateComparer))
{
return false;
}
}
return true;
}
public void GoalSatisified(Goal goal, WorkItem workitem)
{
if (_workitemGoals.ContainsKey(workitem))
{
// 8. Remove the goal from the list of necessary goals
// _workitemGoals[workitem].Remove(goal);
// 9. If all goals are satisfied, check out (complete) the work item
if (_workitemGoals[workitem].Count(g => !g.IsSatisfied()) == 0)
{
CompleteWork(workitem);
}
}
}