Implement DefaultChildType

src/Components/Editor/ContainerOperations.ts

@@ -6,7 +6,7 @@ import { findContainerById } from '../../utils/itertools';
 import { getCurrentHistory } from './Editor';
 import { AddMethod } from '../../Enums/AddMethod';
 import { IAvailableContainer } from '../../Interfaces/IAvailableContainer';
-import { GetDefaultContainerProps } from '../../utils/default';
+import { GetDefaultContainerProps, DEFAULTCHILDTYPE_ALLOW_CYCLIC, DEFAULTCHILDTYPE_MAX_DEPTH } from '../../utils/default';
 import { ApplyBehaviors } from './Behaviors/Behaviors';
 
 /**
@@ -181,12 +181,7 @@ export function AddContainer(
 
   // Set the counter of the object type in order to assign an unique id
   const newCounters = Object.assign({}, current.TypeCounters);
-  if (newCounters[type] === null ||
-      newCounters[type] === undefined) {
-    newCounters[type] = 0;
-  } else {
-    newCounters[type]++;
-  }
+  UpdateCounters(newCounters, type);
   const count = newCounters[type];
 
   // Create maincontainer model
@@ -234,6 +229,8 @@ export function AddContainer(
     parentClone.children.splice(index, 0, newContainer);
   }
 
+  InitializeDefaultChild(configuration, containerConfig, newContainer, newCounters);
+
   // Update the state
   history.push({
     LastAction: `Add ${newContainer.properties.id} in ${parentClone.properties.id}`,
@@ -246,6 +243,74 @@ export function AddContainer(
   setHistoryCurrentStep(history.length - 1);
 }
 
+function UpdateCounters(counters: Record<string, number>, type: string): void {
+  if (counters[type] === null ||
+    counters[type] === undefined) {
+    counters[type] = 0;
+  } else {
+    counters[type]++;
+  }
+}
+
+function InitializeDefaultChild(
+  configuration: IConfiguration,
+  containerConfig: IAvailableContainer,
+  newContainer: ContainerModel,
+  newCounters: Record<string, number>
+): void {
+  if (containerConfig.DefaultChildType === undefined) {
+    return;
+  }
+
+  let currentConfig = configuration.AvailableContainers
+    .find(option => option.Type === containerConfig.DefaultChildType);
+  let parent = newContainer;
+  let depth = 0;
+  const seen = new Set<string>([containerConfig.Type]);
+
+  while (currentConfig !== undefined &&
+    depth <= DEFAULTCHILDTYPE_MAX_DEPTH
+  ) {
+    if (!DEFAULTCHILDTYPE_ALLOW_CYCLIC && seen.has(currentConfig.Type)) {
+      return;
+    }
+
+    seen.add(currentConfig.Type);
+    const x = currentConfig.DefaultX ?? 0;
+    const y = currentConfig.DefaultY ?? 0;
+
+    UpdateCounters(newCounters, currentConfig.Type);
+    const count = newCounters[currentConfig.Type];
+    const defaultChildProperties = GetDefaultContainerProps(
+      currentConfig.Type,
+      count,
+      parent,
+      x,
+      y,
+      currentConfig
+    );
+
+    // Create the container
+    const newChildContainer = new ContainerModel(
+      parent,
+      defaultChildProperties,
+      [],
+      {
+        type: currentConfig.Type
+      }
+    );
+
+    // And push it the the parent children
+    parent.children.push(newChildContainer);
+
+    // iterate
+    depth++;
+    parent = newChildContainer;
+    currentConfig = configuration.AvailableContainers
+      .find(option => option.Type === (currentConfig as IAvailableContainer).DefaultChildType);
+  }
+}
+
 /**
  * Returns a new offset by applying an Add method (append, insert etc.)
  * See AddMethod