Update metadata in existing assets when the model is modified

lib/modules/asset/AssetService.ts

@@ -1,26 +1,42 @@
-import _ from "lodash";
 import { Backend, BadRequestError, PluginContext, User } from "kuzzle";
-import { JSONObject, KDocument, KHit, SearchResult } from "kuzzle-sdk";
+import {
+  BaseRequest,
+  JSONObject,
+  KDocument,
+  KHit,
+  SearchResult,
+  mReplaceResponse,
+} from "kuzzle-sdk";
+import _ from "lodash";
 
-import { MeasureContent } from "../measure/";
 import { AskDeviceUnlinkAsset } from "../device";
-import { EmbeddedMeasure, Metadata, lock, ask, flattenObject } from "../shared";
+import { MeasureContent } from "../measure/";
+import { AskModelAssetGet, AssetModelContent } from "../model";
 import {
+  AskEngineList,
   DeviceManagerConfiguration,
-  InternalCollection,
   DeviceManagerPlugin,
+  InternalCollection,
 } from "../plugin";
-import { AskModelAssetGet } from "../model";
+import {
+  EmbeddedMeasure,
+  Metadata,
+  ask,
+  flattenObject,
+  lock,
+  onAsk,
+} from "../shared";
 
-import { AssetContent } from "./types/AssetContent";
+import { AssetHistoryService } from "./AssetHistoryService";
+import { ApiAssetGetMeasuresResult } from "./exports";
 import { AssetSerializer } from "./model/AssetSerializer";
+import { AssetContent } from "./types/AssetContent";
 import {
+  AskAssetRefreshModel,
   EventAssetUpdateAfter,
   EventAssetUpdateBefore,
 } from "./types/AssetEvents";
-import { AssetHistoryService } from "./AssetHistoryService";
 import { AssetHistoryEventMetadata } from "./types/AssetHistoryContent";
-import { ApiAssetGetMeasuresResult } from "./types/AssetApi";
 
 export class AssetService {
   private context: PluginContext;
@@ -52,6 +68,15 @@ export class AssetService {
     this.context = plugin.context;
     this.config = plugin.config;
     this.assetHistoryService = assetHistoryService;
+
+    this.registerAskEvents();
+  }
+
+  registerAskEvents() {
+    onAsk<AskAssetRefreshModel>(
+      "ask:device-manager:asset:refresh-model",
+      this.refreshModel.bind(this)
+    );
   }
 
   /**
@@ -306,6 +331,42 @@ export class AssetService {
     return result;
   }
 
+  /**
+   * Replace an asset metadata
+   */
+  public async mReplaceAndHistorize(
+    engineId: string,
+    assets: KDocument<AssetContent>[],
+    removedMetadata: string[],
+    { refresh }: { refresh: any }
+  ): Promise<mReplaceResponse> {
+    const replacedAssets = await this.sdk.document.mReplace<AssetContent>(
+      engineId,
+      InternalCollection.ASSETS,
+      assets.map((asset) => ({ _id: asset._id, body: asset._source })),
+      { refresh, source: true }
+    );
+
+    await Promise.all(
+      replacedAssets.successes.map((asset) =>
+        this.assetHistoryService.add<AssetHistoryEventMetadata>(
+          engineId,
+          {
+            metadata: {
+              names: Object.keys(flattenObject(asset._source.metadata)).concat(
+                removedMetadata.map((name) => `-${name}`)
+              ),
+            },
+            name: "metadata",
+          },
+          asset as KDocument<AssetContent>
+        )
+      )
+    );
+
+    return replacedAssets;
+  }
+
   private async getEngine(engineId: string): Promise<JSONObject> {
     const engine = await this.sdk.document.get(
       this.config.adminIndex,
@@ -315,4 +376,76 @@ export class AssetService {
 
     return engine._source.engine;
   }
+
+  private async refreshModel({
+    assetModel,
+  }: {
+    assetModel: AssetModelContent;
+  }): Promise<void> {
+    const engines = await ask<AskEngineList>("ask:device-manager:engine:list", {
+      group: assetModel.engineGroup,
+    });
+
+    const targets = engines.map((engine) => ({
+      collections: [InternalCollection.ASSETS],
+      index: engine.index,
+    }));
+
+    const assets = await this.sdk.query<
+      BaseRequest,
+      JSONObject // TODO: switch to DocumentSearchResult<AssetContent> once KHit<> has index and collection properties
+    >({
+      action: "search",
+      body: { query: { equals: { model: assetModel.asset.model } } },
+      controller: "document",
+      lang: "koncorde",
+      targets,
+    });
+
+    const modelMetadata = {};
+
+    for (const metadataName of Object.keys(assetModel.asset.metadataMappings)) {
+      const defaultMetadata = assetModel.asset.defaultMetadata[metadataName];
+      modelMetadata[metadataName] = defaultMetadata ?? null;
+    }
+
+    const removedMetadata: string[] = [];
+
+    const updatedAssetsPerIndex: Record<string, KDocument<AssetContent>[]> =
+      assets.result.hits.reduce(
+        (acc: Record<string, KDocument<AssetContent>[]>, asset: JSONObject) => {
+          const assetMetadata = { ...asset._source.metadata };
+
+          for (const key of Object.keys(asset._source.metadata)) {
+            if (!(key in modelMetadata)) {
+              removedMetadata.push(key);
+              delete assetMetadata[key];
+            }
+          }
+
+          asset._source.metadata = {
+            ...modelMetadata,
+            ...assetMetadata,
+          };
+
+          acc[asset.index].push(asset as KDocument<AssetContent>);
+
+          return acc;
+        },
+        Object.fromEntries(
+          engines.map((engine) => [
+            engine.index,
+            [] as KDocument<AssetContent>[],
+          ])
+        )
+      );
+
+    await Promise.all(
+      Object.entries(updatedAssetsPerIndex).map(([index, updatedAssets]) =>
+        this.mReplaceAndHistorize(index, updatedAssets, removedMetadata, {
+          refresh: "wait_for",
+        })
+      )
+    );
+  }
 }

lib/modules/asset/types/AssetEvents.ts

@@ -1,4 +1,5 @@
 import { KDocument } from "kuzzle-sdk";
+import { AssetModelContent } from "lib/modules/model";
 
 import { Metadata } from "../../../modules/shared";
 
@@ -17,6 +18,16 @@ export type EventAssetUpdateAfter = {
   args: [{ asset: KDocument<AssetContent>; metadata: Metadata }];
 };
 
+export type AskAssetRefreshModel = {
+  name: "ask:device-manager:asset:refresh-model";
+
+  payload: {
+    assetModel: AssetModelContent;
+  };
+
+  result: void;
+};
+
 /**
  * @internal
  */

lib/modules/model/ModelService.ts

@@ -14,14 +14,15 @@ import {
 } from "../plugin";
 import { ask, onAsk } from "../shared/utils/ask";
 
+import { AskAssetRefreshModel } from "../asset";
+import { flattenObject } from "../shared/utils/flattenObject";
+import { ModelSerializer } from "./ModelSerializer";
 import {
   AssetModelContent,
   DeviceModelContent,
   MeasureModelContent,
 } from "./types/ModelContent";
-import { ModelSerializer } from "./ModelSerializer";
 import { AskModelAssetGet, AskModelDeviceGet } from "./types/ModelEvents";
-import { flattenObject } from "../shared/utils/flattenObject";
 
 export class ModelService {
   private config: DeviceManagerConfiguration;
@@ -90,7 +91,9 @@ export class ModelService {
     );
     await ask<AskEngineUpdateAll>("ask:device-manager:engine:updateAll");
 
-    // @todo update assets in every engine to add the new metadata with null value or default metadata
+    await ask<AskAssetRefreshModel>("ask:device-manager:asset:refresh-model", {
+      assetModel: modelContent,
+    });
 
     return assetModel;
   }

lib/modules/plugin/DeviceManagerEngine.ts

@@ -2,6 +2,7 @@ import _ from "lodash";
 import { Backend, InternalError, Plugin } from "kuzzle";
 import { JSONObject } from "kuzzle-sdk";
 import { AbstractEngine, ConfigManager } from "kuzzle-plugin-commons";
+import { EngineContent } from "kuzzle-plugin-commons/lib/engine/EngineContent";
 
 import { assetsMappings, assetsHistoryMappings } from "../asset";
 import {
@@ -23,6 +24,16 @@ const digitalTwinMappings = {
   device: devicesMappings,
 } as const;
 
+export type AskEngineList = {
+  name: "ask:device-manager:engine:list";
+
+  payload: {
+    group: string | null;
+  };
+
+  result: EngineContent[];
+};
+
 export type AskEngineUpdateAll = {
   name: "ask:device-manager:engine:updateAll";
 
@@ -53,6 +64,10 @@ export class DeviceManagerEngine extends AbstractEngine<DeviceManagerPlugin> {
 
     this.context = plugin.context;
 
+    onAsk<AskEngineList>("ask:device-manager:engine:list", async ({ group }) =>
+      this.list(group)
+    );
+
     onAsk<AskEngineUpdateAll>(
       "ask:device-manager:engine:updateAll",
       async () => {

package.json

@@ -41,6 +41,7 @@
     "kuzzle-sdk": "^7.10.7",
     "ts-jest": "^29.0.5",
     "ts-node": "^10.9.1",
+    "type-fest": "^3.7.2",
     "typescript": "^4.9.5"
   },
   "peerDependencies": {