fanavaran lookups done

src/fanavaran/fanavaran-lookup.service.ts

@@ -7,9 +7,15 @@ import {
   Logger,
   NotFoundException,
 } from "@nestjs/common";
+import { InjectModel } from "@nestjs/mongoose";
+import { Model } from "mongoose";
 import { firstValueFrom } from "rxjs";
 import { isAxiosError } from "axios";
 import { type FanavaranClientKey } from "src/core/config/fanavaran-client.config";
+import {
+  LookupModel,
+  type LookupDocument,
+} from "src/lookups/entities/schema/lookup.schema";
 import {
   FANAVARAN_LOOKUP_BASE_URL,
   fanavaranLookupCacheDir,
@@ -24,6 +30,8 @@ export class FanavaranLookupService {
   constructor(
     private readonly httpService: HttpService,
     private readonly fanavaranAuthService: FanavaranAuthService,
+    @InjectModel(LookupModel.name)
+    private readonly lookupModel: Model<LookupDocument>,
   ) {}
 
   private cacheFilePath(clientKey: FanavaranClientKey, fileName: string): string {
@@ -117,34 +125,114 @@ export class FanavaranLookupService {
     }
   }
 
+  /**
+   * Resolve a remote Fanavaran lookup.
+   *
+   * Parsian (default): file → `lookups` collection → Fanavaran API
+   * Tejaratno with dbSource: file → Fanavaran → DB on API failure
+   * Others: file → Fanavaran
+   */
   async getRemoteLookup(
     clientKey: FanavaranClientKey,
     url: string,
     cacheFile: string,
-    fallback?: () => Promise<unknown>,
+    options?:
+      | (() => Promise<unknown>)
+      | {
+          /** Soft/hard DB read — return null/undefined to miss. */
+          dbSource?: () => Promise<unknown | null | undefined>;
+          /** When true: try DB after file miss, before Fanavaran. */
+          preferDbBeforeRemote?: boolean;
+        },
   ): Promise<unknown> {
+    const normalized =
+      typeof options === "function"
+        ? { dbSource: options, preferDbBeforeRemote: false }
+        : options ?? {};
+
+    const preferDbBeforeRemote =
+      normalized.preferDbBeforeRemote ?? clientKey === "parsian";
+
+    const dbSource =
+      normalized.dbSource ??
+      (preferDbBeforeRemote
+        ? () => this.readLookupsCollectionByCacheFile(cacheFile)
+        : undefined);
+
     const cached = await this.readCacheFile(clientKey, cacheFile);
     if (cached !== null) {
       return cached;
     }
 
+    if (preferDbBeforeRemote && dbSource) {
+      const fromDb = await this.tryDbSource(clientKey, cacheFile, dbSource);
+      if (fromDb !== null) {
+        await this.writeCacheFile(clientKey, cacheFile, fromDb);
+        return fromDb;
+      }
+    }
+
     try {
       const data = await this.fetchFromFanavaran(clientKey, url);
       await this.writeCacheFile(clientKey, cacheFile, data);
       return data;
     } catch (error) {
-      if (fallback) {
+      if (dbSource && !preferDbBeforeRemote) {
         this.logger.warn(
-          `Fanavaran lookup fetch failed for ${clientKey}/${cacheFile}; using fallback`,
+          `Fanavaran lookup fetch failed for ${clientKey}/${cacheFile}; using DB fallback`,
         );
-        const data = await fallback();
-        await this.writeCacheFile(clientKey, cacheFile, data);
-        return data;
+        const data = await dbSource();
+        if (data != null) {
+          await this.writeCacheFile(clientKey, cacheFile, data);
+          return data;
+        }
       }
       throw error;
     }
   }
 
+  private lookupNameFromCacheFile(cacheFile: string): string {
+    return cacheFile.replace(/\.json$/i, "");
+  }
+
+  private async readLookupsCollectionByCacheFile(
+    cacheFile: string,
+  ): Promise<unknown | null> {
+    const name = this.lookupNameFromCacheFile(cacheFile);
+    const doc = await this.lookupModel.findOne({ name }).lean().exec();
+    if (!doc || doc.response == null) {
+      return null;
+    }
+    return doc.response;
+  }
+
+  private async tryDbSource(
+    clientKey: FanavaranClientKey,
+    cacheFile: string,
+    dbSource: () => Promise<unknown | null | undefined>,
+  ): Promise<unknown | null> {
+    try {
+      const data = await dbSource();
+      if (data == null) {
+        this.logger.debug(
+          `[${clientKey}] No DB lookup for ${cacheFile}; will try Fanavaran`,
+        );
+        return null;
+      }
+      this.logger.log(
+        `[${clientKey}] Using lookups collection for ${cacheFile} (before Fanavaran)`,
+      );
+      return data;
+    } catch (error) {
+      this.logger.warn(
+        `[${clientKey}] DB lookup miss for ${cacheFile}: ${
+          error instanceof Error ? error.message : error
+        }; will try Fanavaran`,
+      );
+      return null;
+    }
+  }
+
   async inquiryByVin(
     clientKey: FanavaranClientKey,
     vin: string,