feat(Core/Scripting): Implement TaskScheduler GetNextGroupOccurrence() (

azerothcore#20714)

src/common/Utilities/TaskScheduler.cpp

@@ -124,6 +124,11 @@ bool TaskScheduler::IsGroupScheduled(group_t const group)
     return _task_holder.IsGroupQueued(group);
 }
 
+Milliseconds TaskScheduler::GetNextGroupOcurrence(group_t const group) const
+{
+    return std::chrono::duration_cast<std::chrono::milliseconds>(_task_holder.GetNextGroupOcurrence(group) - clock_t::now());
+}
+
 void TaskScheduler::TaskQueue::Push(TaskContainer&& task)
 {
     container.insert(task);
@@ -189,6 +194,18 @@ bool TaskScheduler::TaskQueue::IsGroupQueued(group_t const group)
     return false;
 }
 
+TaskScheduler::timepoint_t TaskScheduler::TaskQueue::GetNextGroupOcurrence(group_t const group) const
+{
+    TaskScheduler::timepoint_t next = TaskScheduler::timepoint_t::max();
+    for (auto const& task : container)
+    {
+        if (task->IsInGroup(group) && task->_end < next)
+            next = task->_end;
+    }
+
+    return next;
+}
+
 bool TaskScheduler::TaskQueue::IsEmpty() const
 {
     return container.empty();
@@ -231,6 +248,11 @@ TaskScheduler::repeated_t TaskContext::GetRepeatCounter() const
     return _task->_repeated;
 }
 
+TaskScheduler::timepoint_t TaskContext::GetNextOcurrence() const
+{
+    return _task->_end;
+}
+
 TaskContext& TaskContext::Async(std::function<void()> const& callable)
 {
     return Dispatch(std::bind(&TaskScheduler::Async, std::placeholders::_1, callable));

src/common/Utilities/TaskScheduler.h

@@ -148,6 +148,9 @@ class TaskScheduler
         /// Check if the group exists and is currently scheduled.
         bool IsGroupQueued(group_t const group);
 
+        // Returns the next group occurrence.
+        TaskScheduler::timepoint_t GetNextGroupOcurrence(group_t const group) const;
+
         bool IsEmpty() const;
     };
 
@@ -373,6 +376,9 @@ class TaskScheduler
         return RescheduleGroup(group, RandomDurationBetween(min, max));
     }
 
+    // Returns the next group occurrence.
+    Milliseconds GetNextGroupOcurrence(group_t const group) const;
+
 private:
     /// Insert a new task to the enqueued tasks.
     TaskScheduler& InsertTask(TaskContainer task);
@@ -477,6 +483,8 @@ class TaskContext
     /// Returns the repeat counter which increases every time the task is repeated.
     TaskScheduler::repeated_t GetRepeatCounter() const;
 
+    TaskScheduler::timepoint_t GetNextOcurrence() const;
+
     /// Repeats the event and sets a new duration.
     /// std::chrono::seconds(5) for example.
     /// This will consume the task context, its not possible to repeat the task again