Factories for templates and objects, Sztl parsing

SessionZero/Data/SzObjectFactory.cs

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+using System;
+using System.Collections.Generic;
+using SessionZero.Data.Sztl;
+
+namespace SessionZero.Data
+{
+    public static class SzObjectFactory
+    {
+        public static SzObject CreateObject(SzTemplate template)
+        {
+            ArgumentNullException.ThrowIfNull(template);
+
+            SzObject obj = template switch
+            {
+                SzDataObjectTemplate _ => new SzDataObject(),
+                _ => throw new NotImplementedException($"Cannot create object for template type '{template.TemplateType}'")
+            };
+            
+            obj.TemplateId = template.Id;
+            obj.Id = ""; // TODO: This will be replaces with the top level "id" field whenever it gets filled in in the UI
+            obj.Uuid = "0"; // TODO: Generate true UUIDs later
+            
+            foreach (var field in template.Fields)
+            {
+                obj.Fields[field.Key] = new SzField
+                {
+                    Id = field.Value.Id,
+                    Type = field.Value.Type,
+                    Value = field.Value.DefaultValue,
+                    IsTextBlock = field.Value.IsTextBlock
+                };
+            }
+            
+            foreach (var group in template.SubGroups)
+            {
+                obj.FieldGroups[group.Key] = InitializeGroup(group.Value);
+            }
+
+            return obj;
+        }
+
+        private static SzFieldGroup InitializeGroup(SztlFieldGroup groupTemplate)
+        {
+            var group = new SzFieldGroup
+            {
+                Id = groupTemplate.Id
+            };
+            
+            foreach (var field in groupTemplate.Fields)
+            {
+                group.Fields[field.Key] = new SzField
+                {
+                    Id = field.Value.Id,
+                    Type = field.Value.Type,
+                    Value = field.Value.DefaultValue,
+                    IsTextBlock = field.Value.IsTextBlock
+                };
+            }
+            
+            foreach (var subGroup in groupTemplate.SubGroups)
+            {
+                group.SubGroups[subGroup.Key] = InitializeGroup(subGroup.Value);
+            }
+
+            return group;
+        }
+    }
+}