Merge branch 'feature/behavior-tree-builder' into develop

Author: ashblue

Assets/FluidBehaviorTree/Scripts/BehaviorTree/BehaviorTree.cs

@@ -15,10 +15,13 @@ public BehaviorTree (GameObject owner) {
             SyncNodes(Root);
         }
 
-        public void Tick () {
-            if (Root.Update() != TaskStatus.Continue) {
+        public TaskStatus Tick () {
+            var status = Root.Update();
+            if (status != TaskStatus.Continue) {
                 TickCount++;
             }
+
+            return status;
         }
 
         public void Reset () {

Assets/FluidBehaviorTree/Scripts/BehaviorTree/BehaviorTreeBuilder.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using Adnc.FluidBT.Decorators;
+using Adnc.FluidBT.TaskParents;
+using Adnc.FluidBT.TaskParents.Composites;
+using Adnc.FluidBT.Tasks;
+using Adnc.FluidBT.Tasks.Actions;
+using UnityEngine;
+
+namespace Adnc.FluidBT.Trees {
+    public class BehaviorTreeBuilder {
+        private readonly BehaviorTree _tree;
+        private readonly List<ITaskParent> _pointer = new List<ITaskParent>();
+
+        private ITaskParent Pointer {
+            get {
+                if (_pointer.Count == 0) return null;
+                return _pointer[_pointer.Count - 1];
+            }
+        }
+        
+        public BehaviorTreeBuilder (GameObject owner) {
+            _tree = new BehaviorTree(owner);
+            _pointer.Add(_tree.Root);
+        }
+
+        private BehaviorTreeBuilder ParentTask<T> (string name) where T : ITaskParent, new() {
+            var parent = new T { Name = name };
+            _tree.AddNode(Pointer, parent);
+            _pointer.Add(parent);
+
+            return this;
+        }
+
+        public BehaviorTreeBuilder Decorator (string name, Func<ITask, TaskStatus> logic) {
+            var decorator = new DecoratorGeneric {
+                updateLogic = logic,
+                Name = name
+            };
+                        
+            _tree.AddNode(Pointer, decorator);
+            _pointer.Add(decorator);
+            
+            return this;
+        }
+        
+        public BehaviorTreeBuilder Decorator (Func<ITask, TaskStatus> logic) {
+            return Decorator("decorator", logic);
+        }
+
+        public BehaviorTreeBuilder Inverter (string name = "inverter") {
+            return ParentTask<Inverter>(name);
+        }
+        
+        public BehaviorTreeBuilder ReturnSuccess (string name = "return success") {
+            return ParentTask<ReturnSuccess>(name);
+        }
+        
+        public BehaviorTreeBuilder ReturnFailure (string name = "return failure") {
+            return ParentTask<ReturnFailure>(name);
+        }
+        
+        public BehaviorTreeBuilder Sequence (string name = "sequence") {
+            return ParentTask<Sequence>(name);
+        }
+
+        public BehaviorTreeBuilder Selector (string name = "selector") {
+            return ParentTask<Selector>(name);
+        }
+        
+        public BehaviorTreeBuilder Parallel (string name = "parallel") {
+            return ParentTask<Parallel>(name);
+        }
+
+        public BehaviorTreeBuilder Do (string name, Func<TaskStatus> action) {
+            _tree.AddNode(Pointer, new ActionGeneric {
+                Name = name,
+                updateLogic = action
+            });
+            
+            return this;
+        }
+        
+        public BehaviorTreeBuilder Do (Func<TaskStatus> action) {
+            return Do("action", action);
+        }
+
+        public BehaviorTreeBuilder Condition (string name, Func<bool> action) {
+            _tree.AddNode(Pointer, new ConditionGeneric {
+                Name = name,
+                updateLogic = action
+            });
+
+            return this;
+        }
+        
+        public BehaviorTreeBuilder Condition (Func<bool> action) {
+            return Condition("condition", action);
+        }
+
+        public BehaviorTreeBuilder End () {
+            _pointer.RemoveAt(_pointer.Count - 1);
+            
+            return this;
+        }
+
+        public BehaviorTree Build () {
+            return _tree;
+        }
+    }
+}