Changed library search via API to use search context.

backend/nestjs-seshat-api/src/library/library.consumer.ts

@@ -54,7 +54,7 @@ export class LibraryConsumer extends WorkerHost {
       const series: SeriesSubscriptionJobDto = job.data;
       const existingBooks = await this.library.findBooksFromSeries(series);
       const existingVolumes = existingBooks.map(b => b.volume);
-      const lastPublishedBook = existingBooks.sort((a, b) => b.publishedAt.getTime() - a.publishedAt.getTime())[0];
+      const lastPublishedBook = existingBooks.reduce((a, b) => a.publishedAt.getTime() > b.publishedAt.getTime() ? a : b);
       const books = await this.search(job, series, lastPublishedBook?.publishedAt);
 
       let counter = 0;

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

@@ -6,7 +6,7 @@ export class GoogleSearchContext extends SearchContext {
   }
 
 
-  generateQueryParams() {
+  generateQueryParams(): string {
     const filterParams = ['maxResults', 'startIndex', 'orderBy'];
     const searchParams = ['intitle', 'inauthor', 'inpublisher', 'subject', 'isbn'];
 
@@ -120,12 +120,24 @@ export class GoogleSearchContext extends SearchContext {
     }
   }
 
-  next() {
+  previous(pageCount: number = 1): GoogleSearchContext {
+    if (pageCount > 0)
+      return this.update(-pageCount);
+    return this;
+  }
+
+  next(pageCount: number = 1): GoogleSearchContext {
+    if (pageCount > 0)
+      return this.update(pageCount);
+    return this;
+  }
+
+  private update(pageChange: number): GoogleSearchContext {
     const resultsPerPage = this.params['maxResults'] ? parseInt(this.params['maxResults']) : 10;
     const index = this.params['startIndex'] ? parseInt(this.params['startIndex']) : 0;
 
     const data = { ...this.params };
-    data['startIndex'] = (index + resultsPerPage).toString();
+    data['startIndex'] = Math.max(0, index + resultsPerPage * pageChange).toString();
 
     return new GoogleSearchContext(this.search, data);
   }

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

@@ -9,6 +9,7 @@ export abstract class SearchContext {
     this.params = params;
   }
 
-  abstract generateQueryParams();
-  abstract next();
+  abstract generateQueryParams(): string;
+  abstract previous(pageCount: number): SearchContext;
+  abstract next(pageCount: number): SearchContext;
 }

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

@@ -0,0 +1,24 @@
+import { GoogleSearchContext } from "./google.search.context";
+import { SearchContext } from "./search.context";
+
+export class SimplifiedSearchContext {
+  values: { [key: string]: string };
+
+  constructor(values: { [key: string]: string }) {
+    this.values = values;
+  }
+
+  toSearchContext(): SearchContext | null {
+    const provider = this.values['provider']?.toString().toLowerCase();
+    const search = this.values['search']?.toString();
+    const valuesCopy = { ...this.values };
+    delete valuesCopy['provider'];
+    delete valuesCopy['search'];
+
+    if (provider == 'google') {
+      return new GoogleSearchContext(search, valuesCopy)
+    }
+    console.log('abc4')
+    return null;
+  }
+}

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

@@ -12,7 +12,7 @@ export class GoogleService {
   ) { }
 
   async searchRaw(searchQuery: string): Promise<BookSearchResultDto[]> {
-    const queryParams = 'langRestrict=en&printType=books&maxResults=10&fields=items(kind,id,volumeInfo(title,description,authors,publisher,publishedDate,industryIdentifiers,language,categories,maturityRating,imageLinks,canonicalVolumeLink,seriesInfo))&q=';
+    const queryParams = 'langRestrict=en&printType=books&maxResults=20&fields=items(kind,id,volumeInfo(title,description,authors,publisher,publishedDate,industryIdentifiers,language,categories,maturityRating,imageLinks,canonicalVolumeLink,seriesInfo))&q=';
 
     return await firstValueFrom(
       this.http.get('https://www.googleapis.com/books/v1/volumes?' + queryParams + searchQuery)
@@ -46,7 +46,6 @@ export class GoogleService {
     }
 
     return response.data.items
-      //.filter(item => item.volumeInfo?.canonicalVolumeLink?.startsWith('https://play.google.com/store/books/details'))
       .map(item => this.extract(item));
   }
 

backend/nestjs-seshat-api/src/providers/providers.controller.ts

@@ -1,7 +1,7 @@
-import { Body, Controller, Get, UseGuards } from '@nestjs/common';
+import { Controller, Get, Query, UseGuards } from '@nestjs/common';
 import { ProvidersService } from './providers.service';
-import { BookSearchInputDto } from './dto/book-search-input.dto';
 import { JwtAccessGuard } from 'src/auth/guards/jwt-access.guard';
+import { SimplifiedSearchContext } from './contexts/simplified-search-context';
 
 @Controller('providers')
 export class ProvidersController {
@@ -12,8 +12,10 @@ export class ProvidersController {
   @UseGuards(JwtAccessGuard)
   @Get('search')
   async Search(
-    @Body() body: BookSearchInputDto,
+    @Query() context,
   ) {
-    return await this.providers.searchRaw(body.provider, body.query);
+    const simplified = new SimplifiedSearchContext(context);
+    const searchContext = simplified.toSearchContext();
+    return await this.providers.search(searchContext);
   }
 }