Merged PR 16: Transform every single class components into functional component

This improve greatly the performance and the code cleaning.
It allows us to separate the inseparable class methods into modules functions

src/Components/Editor/ContainerOperations.ts

@@ -0,0 +1,269 @@
+import { Dispatch, SetStateAction } from 'react';
+import { HistoryState } from "../../Interfaces/HistoryState";
+import { Configuration } from '../../Interfaces/Configuration';
+import { ContainerModel, IContainerModel } from '../../Interfaces/ContainerModel';
+import { findContainerById } from '../../utils/itertools';
+import { getCurrentHistory } from './Editor';
+
+/**
+ * Select a container
+ * @param container Selected container
+ */
+export function SelectContainer(
+  container: ContainerModel,
+  fullHistory: HistoryState[],
+  historyCurrentStep: number,
+  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
+  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
+): void {
+  const history = getCurrentHistory(fullHistory, historyCurrentStep);
+  const current = history[history.length - 1];
+
+  if (current.MainContainer === null) {
+    throw new Error('[SelectContainer] Tried to select a container while there is no main container!');
+  }
+
+  const mainContainerClone = structuredClone(current.MainContainer);
+  const SelectedContainer = findContainerById(mainContainerClone, container.properties.id);
+
+  if (SelectedContainer === undefined) {
+    throw new Error('[SelectContainer] Cannot find container among children of main container!');
+  }
+
+  setHistory(history.concat([{
+    MainContainer: mainContainerClone,
+    TypeCounters: Object.assign({}, current.TypeCounters),
+    SelectedContainer,
+    SelectedContainerId: SelectedContainer.properties.id
+  }]));
+  setHistoryCurrentStep(history.length);
+}
+
+export function DeleteContainer(
+  containerId: string,
+  fullHistory: HistoryState[],
+  historyCurrentStep: number,
+  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
+  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
+): void {
+  const history = getCurrentHistory(fullHistory, historyCurrentStep);
+  const current = history[historyCurrentStep];
+
+  if (current.MainContainer === null) {
+    throw new Error('[DeleteContainer] Error: Tried to delete a container without a main container');
+  }
+
+  const mainContainerClone: IContainerModel = structuredClone(current.MainContainer);
+  const container = findContainerById(mainContainerClone, containerId);
+
+  if (container === undefined) {
+    throw new Error(`[DeleteContainer] Tried to delete a container that is not present in the main container: ${containerId}`);
+  }
+
+  if (container === mainContainerClone) {
+    // TODO: Implement alert
+    throw new Error('[DeleteContainer] Tried to delete the main container! Deleting the main container is not allowed !');
+  }
+
+  if (container === null || container === undefined) {
+    throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
+  }
+
+  if (container.parent != null) {
+    const index = container.parent.children.indexOf(container);
+    if (index > -1) {
+      container.parent.children.splice(index, 1);
+    }
+  }
+
+  setHistory(history.concat([{
+    SelectedContainer: null,
+    SelectedContainerId: '',
+    MainContainer: mainContainerClone,
+    TypeCounters: Object.assign({}, current.TypeCounters)
+  }]));
+  setHistoryCurrentStep(history.length);
+}
+
+/**
+ * Add a new container to a selected container
+ * @param type The type of container
+ * @returns void
+ */
+export function AddContainerToSelectedContainer(
+  type: string,
+  configuration: Configuration,
+  fullHistory: HistoryState[],
+  historyCurrentStep: number,
+  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
+  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
+): void {
+  const history = getCurrentHistory(fullHistory, historyCurrentStep);
+  const current = history[history.length - 1];
+
+  if (current.SelectedContainer === null ||
+      current.SelectedContainer === undefined) {
+    return;
+  }
+
+  const parent = current.SelectedContainer;
+  AddContainer(
+    parent.children.length,
+    type,
+    parent.properties.id,
+    configuration,
+    fullHistory,
+    historyCurrentStep,
+    setHistory,
+    setHistoryCurrentStep
+  );
+}
+
+export function AddContainer(
+  index: number,
+  type: string,
+  parentId: string,
+  configuration: Configuration,
+  fullHistory: HistoryState[],
+  historyCurrentStep: number,
+  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
+  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
+): void {
+  const history = getCurrentHistory(fullHistory, historyCurrentStep);
+  const current = history[history.length - 1];
+
+  if (current.MainContainer === null ||
+      current.MainContainer === undefined) {
+    return;
+  }
+
+  // Get the preset properties from the API
+  const properties = configuration.AvailableContainers
+    .find(option => option.Type === type);
+
+  if (properties === undefined) {
+    throw new Error(`[AddContainer] Object type not found. Found: ${type}`);
+  }
+
+  // Set the counter of the object type in order to assign an unique id
+  const newCounters = Object.assign({}, current.TypeCounters);
+  if (newCounters[type] === null ||
+      newCounters[type] === undefined) {
+    newCounters[type] = 0;
+  } else {
+    newCounters[type]++;
+  }
+  const count = newCounters[type];
+
+  // Create maincontainer model
+  const clone: IContainerModel = structuredClone(current.MainContainer);
+
+  // Find the parent
+  const parentClone: IContainerModel | undefined = findContainerById(
+    clone, parentId
+  );
+
+  if (parentClone === null || parentClone === undefined) {
+    throw new Error('[AddContainer] Container model was not found among children of the main container!');
+  }
+
+  let x = 0;
+  if (index !== 0) {
+    const lastChild: IContainerModel | undefined = parentClone.children.at(index - 1);
+    if (lastChild !== undefined) {
+      x = lastChild.properties.x + Number(lastChild.properties.width);
+    }
+  }
+
+  // Create the container
+  const newContainer = new ContainerModel(
+    parentClone,
+    {
+      id: `${type}-${count}`,
+      parentId: parentClone.properties.id,
+      x,
+      y: 0,
+      width: properties?.Width,
+      height: parentClone.properties.height,
+      ...properties.Style
+    },
+    [],
+    {
+      type
+    }
+  );
+
+  // And push it the the parent children
+  if (index === parentClone.children.length) {
+    parentClone.children.push(newContainer);
+  } else {
+    parentClone.children.splice(index, 0, newContainer);
+  }
+
+  // Update the state
+  setHistory(history.concat([{
+    MainContainer: clone,
+    TypeCounters: newCounters,
+    SelectedContainer: parentClone,
+    SelectedContainerId: parentClone.properties.id
+  }]));
+  setHistoryCurrentStep(history.length);
+}
+
+/**
+  * Handled the property change event in the properties form
+  * @param key Property name
+  * @param value New value of the property
+  * @returns void
+  */
+export function OnPropertyChange(
+  key: string,
+  value: string | number,
+  fullHistory: HistoryState[],
+  historyCurrentStep: number,
+  setHistory: Dispatch<SetStateAction<HistoryState[]>>,
+  setHistoryCurrentStep: Dispatch<SetStateAction<number>>
+): void {
+  const history = getCurrentHistory(fullHistory, historyCurrentStep);
+  const current = history[history.length - 1];
+
+  if (current.SelectedContainer === null ||
+      current.SelectedContainer === undefined) {
+    throw new Error('[OnPropertyChange] Property was changed before selecting a Container');
+  }
+
+  if (current.MainContainer === null ||
+      current.MainContainer === undefined) {
+    throw new Error('[OnPropertyChange] Property was changed before the main container was added');
+  }
+
+  if (parent === null) {
+    const selectedContainerClone: IContainerModel = structuredClone(current.SelectedContainer);
+    (selectedContainerClone.properties as any)[key] = value;
+    setHistory(history.concat([{
+      SelectedContainer: selectedContainerClone,
+      SelectedContainerId: selectedContainerClone.properties.id,
+      MainContainer: selectedContainerClone,
+      TypeCounters: Object.assign({}, current.TypeCounters)
+    }]));
+    setHistoryCurrentStep(history.length);
+    return;
+  }
+
+  const mainContainerClone: IContainerModel = structuredClone(current.MainContainer);
+  const container: ContainerModel | undefined = findContainerById(mainContainerClone, current.SelectedContainer.properties.id);
+
+  if (container === null || container === undefined) {
+    throw new Error('[OnPropertyChange] Container model was not found among children of the main container!');
+  }
+
+  (container.properties as any)[key] = value;
+
+  setHistory(history.concat([{
+    SelectedContainer: container,
+    SelectedContainerId: container.properties.id,
+    MainContainer: mainContainerClone,
+    TypeCounters: Object.assign({}, current.TypeCounters)
+  }]));
+  setHistoryCurrentStep(history.length);
+}