app/node_modules/@babylonjs/core/Misc/sceneRecorder.js

import { SceneSerializer } from "./sceneSerializer.js";
import { Mesh } from "../Meshes/mesh.js";
import { Light } from "../Lights/light.js";
import { Camera } from "../Cameras/camera.js";
import { Skeleton } from "../Bones/skeleton.js";
import { Material } from "../Materials/material.js";
import { MultiMaterial } from "../Materials/multiMaterial.js";
import { TransformNode } from "../Meshes/transformNode.js";
import { ParticleSystem } from "../Particles/particleSystem.js";
import { MorphTargetManager } from "../Morph/morphTargetManager.js";
import { ShadowGenerator } from "../Lights/Shadows/shadowGenerator.js";
import { PostProcess } from "../PostProcesses/postProcess.js";
import { Texture } from "../Materials/Textures/texture.js";
import { SerializationHelper } from "./decorators.serialization.js";
/**
 * Class used to record delta files between 2 scene states
 */
export class SceneRecorder {
    constructor() {
        this._trackedScene = null;
    }
    /**
     * Track a given scene. This means the current scene state will be considered the original state
     * @param scene defines the scene to track
     */
    track(scene) {
        this._trackedScene = scene;
        SerializationHelper.AllowLoadingUniqueId = true;
        this._savedJSON = SceneSerializer.Serialize(scene);
        SerializationHelper.AllowLoadingUniqueId = false;
    }
    /**
     * Get the delta between current state and original state
     * @returns a any containing the delta
     */
    getDelta() {
        if (!this._trackedScene) {
            return null;
        }
        const currentForceSerializeBuffers = Texture.ForceSerializeBuffers;
        Texture.ForceSerializeBuffers = false;
        SerializationHelper.AllowLoadingUniqueId = true;
        const newJSON = SceneSerializer.Serialize(this._trackedScene);
        SerializationHelper.AllowLoadingUniqueId = false;
        const deltaJSON = {};
        for (const node in newJSON) {
            this._compareCollections(node, this._savedJSON[node], newJSON[node], deltaJSON);
        }
        Texture.ForceSerializeBuffers = currentForceSerializeBuffers;
        return deltaJSON;
    }
    _compareArray(key, original, current, deltaJSON) {
        if (original.length === 0 && current.length === 0) {
            return true;
        }
        // Numbers?
        if ((original.length && !isNaN(original[0])) || (current.length && !isNaN(current[0]))) {
            if (original.length !== current.length) {
                return false;
            }
            if (original.length === 0) {
                return true;
            }
            for (let index = 0; index < original.length; index++) {
                if (original[index] !== current[index]) {
                    deltaJSON[key] = current;
                    return false;
                }
            }
            return true;
        }
        // let's use uniqueId to find similar objects
        const originalUniqueIds = [];
        for (let index = 0; index < original.length; index++) {
            const originalObject = original[index];
            const originalUniqueId = originalObject.uniqueId;
            originalUniqueIds.push(originalUniqueId);
            // Look for that object in current state
            const currentObjects = current.filter((c) => c.uniqueId === originalUniqueId);
            if (currentObjects.length) {
                // We have a candidate
                const currentObject = currentObjects[0];
                const newObject = {};
                if (!this._compareObjects(originalObject, currentObject, newObject)) {
                    if (!deltaJSON[key]) {
                        deltaJSON[key] = [];
                    }
                    newObject.__state = {
                        id: currentObject.id || currentObject.name,
                    };
                    deltaJSON[key].push(newObject);
                }
            }
            else {
                // We need to delete
                const newObject = {
                    __state: {
                        deleteId: originalObject.id || originalObject.name,
                    },
                };
                if (!deltaJSON[key]) {
                    deltaJSON[key] = [];
                }
                deltaJSON[key].push(newObject);
            }
        }
        // Checking for new objects
        for (let index = 0; index < current.length; index++) {
            const currentObject = current[index];
            const currentUniqueId = currentObject.uniqueId;
            // Object was added
            if (originalUniqueIds.indexOf(currentUniqueId) === -1) {
                if (!deltaJSON[key]) {
                    deltaJSON[key] = [];
                }
                deltaJSON[key].push(currentObject);
            }
        }
        return true;
    }
    _compareObjects(originalObjet, currentObject, deltaJSON) {
        let aDifferenceWasFound = false;
        for (const prop in originalObjet) {
            if (!Object.prototype.hasOwnProperty.call(originalObjet, prop)) {
                continue;
            }
            const originalValue = originalObjet[prop];
            const currentValue = currentObject[prop];
            let diffFound = false;
            if (Array.isArray(originalValue)) {
                diffFound = JSON.stringify(originalValue) !== JSON.stringify(currentValue);
            }
            else if (!isNaN(originalValue) || Object.prototype.toString.call(originalValue) == "[object String]") {
                diffFound = originalValue !== currentValue;
            }
            else if (typeof originalValue === "object" && typeof currentValue === "object") {
                const newObject = {};
                if (!this._compareObjects(originalValue, currentValue, newObject)) {
                    deltaJSON[prop] = newObject;
                    aDifferenceWasFound = true;
                }
            }
            if (diffFound) {
                aDifferenceWasFound = true;
                deltaJSON[prop] = currentValue;
            }
        }
        return !aDifferenceWasFound;
    }
    _compareCollections(key, original, current, deltaJSON) {
        // Same ?
        if (original === current) {
            return;
        }
        if (original && current) {
            // Array?
            if (Array.isArray(original) && Array.isArray(current)) {
                if (this._compareArray(key, original, current, deltaJSON)) {
                    return;
                }
            }
            else if (typeof original === "object" && typeof current === "object") {
                // Object
                const newObject = {};
                if (!this._compareObjects(original, current, newObject)) {
                    deltaJSON[key] = newObject;
                }
                return;
            }
        }
    }
    static GetShadowGeneratorById(scene, id) {
        const allGenerators = scene.lights.map((l) => l.getShadowGenerators());
        for (const generators of allGenerators) {
            if (generators) {
                const iterator = generators.values();
                for (let key = iterator.next(); key.done !== true; key = iterator.next()) {
                    const generator = key.value;
                    if (generator && generator.id === id) {
                        return generator;
                    }
                }
            }
        }
        return null;
    }
    /**
     * Apply a given delta to a given scene
     * @param deltaJSON defines the JSON containing the delta
     * @param scene defines the scene to apply the delta to
     */
    static ApplyDelta(deltaJSON, scene) {
        if (typeof deltaJSON === "string") {
            deltaJSON = JSON.parse(deltaJSON);
        }
        // Scene
        const anyScene = scene;
        for (const prop in deltaJSON) {
            const source = deltaJSON[prop];
            const property = anyScene[prop];
            if (Array.isArray(property) || prop === "shadowGenerators") {
                // Restore array
                switch (prop) {
                    case "cameras":
                        this._ApplyDeltaForEntity(source, scene, scene.getCameraById.bind(scene), (data) => Camera.Parse(data, scene));
                        break;
                    case "lights":
                        this._ApplyDeltaForEntity(source, scene, scene.getLightById.bind(scene), (data) => Light.Parse(data, scene));
                        break;
                    case "shadowGenerators":
                        this._ApplyDeltaForEntity(source, scene, (id) => this.GetShadowGeneratorById(scene, id), (data) => ShadowGenerator.Parse(data, scene));
                        break;
                    case "meshes":
                        this._ApplyDeltaForEntity(source, scene, scene.getMeshById.bind(scene), (data) => Mesh.Parse(data, scene, ""));
                        break;
                    case "skeletons":
                        this._ApplyDeltaForEntity(source, scene, scene.getSkeletonById.bind(scene), (data) => Skeleton.Parse(data, scene));
                        break;
                    case "materials":
                        this._ApplyDeltaForEntity(source, scene, scene.getMaterialById.bind(scene), (data) => Material.Parse(data, scene, ""));
                        break;
                    case "multiMaterials":
                        this._ApplyDeltaForEntity(source, scene, scene.getMaterialById.bind(scene), (data) => MultiMaterial.Parse(data, scene, ""));
                        break;
                    case "transformNodes":
                        this._ApplyDeltaForEntity(source, scene, scene.getTransformNodeById.bind(scene), (data) => TransformNode.Parse(data, scene, ""));
                        break;
                    case "particleSystems":
                        this._ApplyDeltaForEntity(source, scene, scene.getParticleSystemById.bind(scene), (data) => ParticleSystem.Parse(data, scene, ""));
                        break;
                    case "morphTargetManagers":
                        this._ApplyDeltaForEntity(source, scene, scene.getMorphTargetById.bind(scene), (data) => MorphTargetManager.Parse(data, scene));
                        break;
                    case "postProcesses":
                        this._ApplyDeltaForEntity(source, scene, scene.getPostProcessByName.bind(scene), (data) => PostProcess.Parse(data, scene, ""));
                        break;
                }
            }
            else if (!isNaN(property)) {
                anyScene[prop] = source;
            }
            else if (property.fromArray) {
                property.fromArray(source);
            }
        }
    }
    static _ApplyPropertiesToEntity(deltaJSON, entity) {
        for (const prop in deltaJSON) {
            const source = deltaJSON[prop];
            const property = entity[prop];
            if (property === undefined) {
                continue;
            }
            if (!isNaN(property) || Array.isArray(property)) {
                entity[prop] = source;
            }
            else if (property.fromArray) {
                property.fromArray(source);
            }
            else if (typeof property === "object" && property !== null) {
                this._ApplyPropertiesToEntity(source, property);
            }
        }
    }
    static _ApplyDeltaForEntity(sources, scene, finder, addNew) {
        for (const source of sources) {
            // Update
            if (source.__state && source.__state.id !== undefined) {
                const targetEntity = finder(source.__state.id);
                if (targetEntity) {
                    // This first pass applies properties that aren't on the serialization list
                    this._ApplyPropertiesToEntity(source, targetEntity);
                    // The second pass applies the serializable properties
                    SerializationHelper.ParseProperties(source, targetEntity, scene, null);
                }
            }
            else if (source.__state && source.__state.deleteId !== undefined) {
                const target = finder(source.__state.deleteId);
                target?.dispose();
            }
            else {
                // New
                addNew(source);
            }
        }
    }
}
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