Added configuration for search for frontend.

backend/nestjs-seshat-api/assets/config/config.json

@@ -1,5 +1,21 @@
 {
-  "features": {
-    "registration": false
-  }
+    "features": {
+        "registration": false
+    },
+    "providers": {
+        "default": "google",
+        "google": {
+            "name": "Google",
+            "filters": {},
+            "languages": {
+                "zh": "Chinese",
+                "nl": "Dutch",
+                "en": "English",
+                "fr": "Francais",
+                "ko": "Korean",
+                "ja": "Japanese",
+                "es": "Spanish"
+            }
+        }
+    }
 }

backend/nestjs-seshat-api/src/providers/contexts/google.search.context.ts

@@ -7,7 +7,7 @@ export class GoogleSearchContext extends SearchContext {
 
 
   generateQueryParams(): string {
-    const filterParams = ['maxResults', 'startIndex', 'orderBy'];
+    const filterParams = ['maxResults', 'startIndex', 'orderBy', 'langRestrict'];
     const searchParams = ['intitle', 'inauthor', 'inpublisher', 'subject', 'isbn'];
 
     const queryParams = filterParams

backend/nestjs-seshat-api/src/providers/google/google.service.ts

@@ -1,14 +1,16 @@
-import { Injectable } from '@nestjs/common';
+import { BadRequestException, HttpException, Injectable } from '@nestjs/common';
 import { BookSearchResultDto } from '../dto/book-search-result.dto';
 import { HttpService } from '@nestjs/axios';
-import { firstValueFrom, map, timeout } from 'rxjs';
-import { AxiosResponse } from 'axios';
+import { catchError, EMPTY, firstValueFrom, map, timeout } from 'rxjs';
+import { AxiosError, AxiosResponse } from 'axios';
 import { GoogleSearchContext } from '../contexts/google.search.context';
+import { PinoLogger } from 'nestjs-pino';
 
 @Injectable()
 export class GoogleService {
   constructor(
     private readonly http: HttpService,
+    private readonly logger: PinoLogger,
   ) { }
 
   async searchRaw(searchQuery: string): Promise<BookSearchResultDto[]> {
@@ -28,7 +30,7 @@ export class GoogleService {
       return null;
     }
 
-    const defaultQueryParams = 'langRestrict=en&printType=books&fields=items(kind,id,volumeInfo(title,description,authors,publisher,publishedDate,industryIdentifiers,language,categories,maturityRating,imageLinks,canonicalVolumeLink,seriesInfo))';
+    const defaultQueryParams = 'printType=books&fields=items(kind,id,volumeInfo(title,description,authors,publisher,publishedDate,industryIdentifiers,language,categories,maturityRating,imageLinks,canonicalVolumeLink,seriesInfo))';
     const customQueryParams = context.generateQueryParams();
 
     return await firstValueFrom(
@@ -36,6 +38,23 @@ export class GoogleService {
         .pipe(
           timeout({ first: 5000 }),
           map(value => this.transform(value)),
+          catchError((err: any) => {
+            if (err instanceof AxiosError) {
+              if (err.status == 400) {
+                throw new BadRequestException(err.response.data);
+              } else if (err.status == 429) {
+                throw new HttpException(err.response?.data, 429);
+              }
+            }
+
+            this.logger.error({
+              class: GoogleService.name,
+              method: this.search.name,
+              msg: 'Unknown Google search error.',
+              error: err,
+            });
+            return EMPTY;
+          })
         )
     );
   }