Better stack management

Advanced Software Engineering/Advanced Software Engineering/Drawer.cs

@@ -12,7 +12,7 @@ namespace Advanced_Software_Engineering {
     /// </summary>
     public class Drawer {
 
-        protected static Dictionary<int, ValueStorage> ValueStorages = new Dictionary<int, ValueStorage>();
+        private ValueStorage valueStorage = new ValueStorage();
 
         /// <summary>
         /// The starting color of the pen / brush
@@ -67,7 +67,7 @@ namespace Advanced_Software_Engineering {
             pen = new Pen(defaultColor, defaultWidth);
             brush = new SolidBrush(defaultColor);
             fill = false;
-            foreach (int valueStorage in ValueStorages.Keys) ValueStorages[valueStorage].Reset();
+            valueStorage = new ValueStorage();
         }
 
         /// <summary>
@@ -189,16 +189,8 @@ namespace Advanced_Software_Engineering {
             graphics.FillRectangle(new SolidBrush(pen.Color), penPosition.X, penPosition.Y, 1, 1);
         }
 
-        public void SetStack(int name, ValueStorage value) {
-            ValueStorages[name] = value;
-        }
-
-        public ValueStorage GetStack(int name) {
-            return ValueStorages[name];
-        }
-
-        public bool CheckStackExists(int name) {
-            return ValueStorages.ContainsKey(name);
+        public ValueStorage GetValueStorage() {
+            return valueStorage;
         }
 
     }

Advanced Software Engineering/Advanced Software Engineering/Verbs/Flow/VerbChunk.cs

@@ -1,12 +1,22 @@
-namespace Advanced_Software_Engineering.Verbs.Flow {
+using System.Collections.Generic;
+
+namespace Advanced_Software_Engineering.Verbs.Flow {
 
     public class VerbChunk : IVerb {
-        private readonly IVerb[] verbs;
+        private readonly List<IVerb> verbs;
 
-        public VerbChunk(IVerb[] verbs) {
+        public VerbChunk(List<IVerb> verbs) {
             this.verbs = verbs;
         }
 
+        public VerbChunk() {
+            verbs = new List<IVerb> { };
+        }
+
+        public void AddVerb(IVerb verb) {
+            verbs.Add(verb);
+        }
+
         public void ExecuteVerb() {
             foreach (IVerb verb in verbs) verb.ExecuteVerb();
         }

Advanced Software Engineering/Advanced Software Engineering/Verbs/Value/ValueStorage.cs

@@ -3,7 +3,8 @@
 namespace Advanced_Software_Engineering.Verbs.Value {
     public class ValueStorage {
 
-        protected Dictionary<string, IValue> Variables = new Dictionary<string, IValue>();
+        protected int currentStack;
+        protected Dictionary<int,Dictionary<string, IValue>> Variables = new Dictionary<int,Dictionary<string, IValue>>();
 
         public ValueStorage() {
             Reset();
@@ -11,19 +12,41 @@ namespace Advanced_Software_Engineering.Verbs.Value {
 
         public void Reset() {
             Variables.Clear();
+            SetStack(0);
+        }
+
+        public void Reset(int stack) {
+            Variables[stack].Clear();
+        }
+
+        public void SetStack(int stack) {
+            currentStack = stack;
+            if (!Variables.ContainsKey(stack)) Variables.Add(currentStack, new Dictionary<string, IValue>());
+        }
+
+        public void SetVariable(string name, int stack, IValue value) {
+            Variables[stack][name] = value;
         }
 
         public void SetVariable(string name, IValue value) {
-            Variables[name] = value;
+            SetVariable(name, currentStack, value);
+        }
+
+        public IValue GetVariable(string name, int stack) {
+            return Variables[stack][name];
         }
 
         public IValue GetVariable(string name) {
-            return Variables[name];
+            return GetVariable(name, currentStack);
+        }
+
+        public bool CheckVariableExists(string name, int stack) {
+            if (name == null) return false;
+            return Variables[stack].ContainsKey(name);
         }
 
         public bool CheckVariableExists(string name) {
-            if (name == null) return false;
-            return Variables.ContainsKey(name);
+            return CheckVariableExists(name, currentStack);
         }
     }
 }

Advanced Software Engineering/Advanced Software Engineering/Verbs/VerbFactory.cs

@@ -24,13 +24,7 @@ namespace Advanced_Software_Engineering {
         public static IVerb MakeVerb(Drawer drawer, string fullCommand) {
             int stackLevel = 0;
 
-            ValueStorage rootValueStorage;
-            if (drawer.CheckStackExists(stackLevel)) {
-                rootValueStorage = drawer.GetStack(stackLevel);
-            } else {
-                rootValueStorage = new ValueStorage();
-                drawer.SetStack(stackLevel, rootValueStorage);
-            }
+            ValueStorage rootValueStorage = drawer.GetValueStorage();
 
             CommandAndParameterParserResult result = HelperFunctions.CommandAndParameterParser(fullCommand);