Add open library API call when search has no result

internal/model/book.go

@@ -4,13 +4,14 @@ import "gorm.io/gorm"
 
 type Book struct {
 	gorm.Model
-	Title     string `json:"title" gorm:"not null"`
-	ISBN      string `json:"isbn"`
-	Summary   string `json:"summary"`
-	Author    Author
-	AuthorID  uint
-	AddedBy   User
-	AddedByID uint
-	Cover     StaticFile
-	CoverID   uint
+	Title         string `json:"title" gorm:"not null"`
+	ISBN          string `json:"isbn"`
+	OpenLibraryId string `json:"openlibraryid"`
+	Summary       string `json:"summary"`
+	Author        Author
+	AuthorID      uint
+	AddedBy       User
+	AddedByID     uint
+	Cover         StaticFile
+	CoverID       uint
 }

internal/openlibrary/openlibrary.go

@@ -0,0 +1,70 @@
+package openlibrary
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+type OpenLibraryQueryResult struct {
+	Books    []OpenLibraryBook `json:"docs"`
+	NumFound int               `json:"numFound"`
+}
+
+type OpenLibraryBook struct {
+	Title         string   `json:"title"`
+	Authors       []string `json:"author_name"`
+	OpenLibraryId string   `json:"cover_edition_key"`
+}
+
+func CallOpenLibrary(searchterm string, limit int, offset int) (OpenLibraryQueryResult, error) {
+	var queryResult OpenLibraryQueryResult
+	baseUrl := "https://openlibrary.org"
+	booksApiUrl := "search.json"
+	u, err := url.Parse(baseUrl)
+	if err != nil {
+		return queryResult, err
+	}
+	u = u.JoinPath(booksApiUrl)
+	if limit != 0 {
+		addQueryParamInt(u, "limit", limit)
+	}
+	if offset != 0 {
+		addQueryParamInt(u, "offset", offset)
+	}
+	addQueryParam(u, "q", searchterm)
+	client := &http.Client{}
+	req, err := http.NewRequest("GET", u.String(), nil)
+	if err != nil {
+		return queryResult, err
+	}
+	req.Header.Add("Accept", "application/json")
+	req.Header.Add("User-Agent", "PersonalLibraryManager/0.1 (artlef@protonmail.com)")
+	resp, err := client.Do(req)
+	if err != nil {
+		return queryResult, err
+	}
+	defer resp.Body.Close()
+
+	bodyBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return queryResult, err
+	}
+	bodyString := string(bodyBytes)
+	decoder := json.NewDecoder(strings.NewReader(bodyString))
+	err = decoder.Decode(&queryResult)
+	return queryResult, err
+}
+
+func addQueryParamInt(u *url.URL, paramName string, paramValue int) {
+	addQueryParam(u, paramName, strconv.Itoa(paramValue))
+}
+
+func addQueryParam(u *url.URL, paramName string, paramValue string) {
+	q := u.Query()
+	q.Set(paramName, paramValue)
+	u.RawQuery = q.Encode()
+}

internal/openlibrary/openlibrary_test.go

@@ -0,0 +1,27 @@
+package openlibrary_test
+
+import (
+	"testing"
+
+	"git.artlef.fr/PersonalLibraryManager/internal/openlibrary"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCallOpenLibrary(t *testing.T) {
+	result, err := openlibrary.CallOpenLibrary("man in high castle", 0, 0)
+	assert.Nil(t, err)
+	assert.Equal(t, result.NumFound, 25)
+	assert.Equal(t, len(result.Books), 25)
+}
+
+func TestCallOpenLibraryLimit(t *testing.T) {
+	result, err := openlibrary.CallOpenLibrary("man in high castle", 10, 0)
+	assert.Nil(t, err)
+	assert.Equal(t, len(result.Books), 10)
+}
+
+func TestCallOpenLibraryOffset(t *testing.T) {
+	result, err := openlibrary.CallOpenLibrary("man in high castle", 0, 10)
+	assert.Nil(t, err)
+	assert.Equal(t, len(result.Books), 15)
+}

internal/query/search.go

@@ -9,13 +9,14 @@ import (
 )
 
 type BookSearchGet struct {
-	ID        uint   `json:"id"`
-	Title     string `json:"title" binding:"required,max=300"`
-	Author    string `json:"author" binding:"max=100"`
-	Rating    int    `json:"rating"`
-	Read      bool   `json:"read"`
-	WantRead  bool   `json:"wantread"`
-	CoverPath string `json:"coverPath"`
+	ID            uint   `json:"id"`
+	Title         string `json:"title" binding:"required,max=300"`
+	Author        string `json:"author" binding:"max=100"`
+	OpenLibraryId string `json:"openlibraryid"`
+	Rating        int    `json:"rating"`
+	Read          bool   `json:"read"`
+	WantRead      bool   `json:"wantread"`
+	CoverPath     string `json:"coverPath"`
 }
 
 func FetchBookSearchByAuthorGet(db *gorm.DB, userId uint, authorId uint64, limit int, offset int) ([]BookSearchGet, error) {
@@ -69,7 +70,7 @@ func fetchBookSearchQuery(db *gorm.DB, userId uint, searchterm string) *gorm.DB
 
 func fetchBookSearchQueryBuilder(db *gorm.DB, userId uint) *gorm.DB {
 	query := db.Model(&model.Book{})
-	query = query.Select("books.id, books.title, authors.name as author, user_books.rating, user_books.read, user_books.want_read, " + selectStaticFilesPath())
+	query = query.Select("books.id, books.title, authors.name as author, books.open_library_id, user_books.rating, user_books.read, user_books.want_read, " + selectStaticFilesPath())
 	query = joinAuthors(query)
 	query = query.Joins("left join user_books on (user_books.book_id = books.id and user_books.user_id = ?)", userId)
 	query = joinStaticFiles(query)

internal/routes/booksearchget.go

@@ -5,6 +5,7 @@ import (
 
 	"git.artlef.fr/PersonalLibraryManager/internal/appcontext"
 	"git.artlef.fr/PersonalLibraryManager/internal/myvalidator"
+	"git.artlef.fr/PersonalLibraryManager/internal/openlibrary"
 	"git.artlef.fr/PersonalLibraryManager/internal/query"
 	"github.com/gin-gonic/gin"
 )
@@ -33,7 +34,36 @@ func GetSearchBooksHandler(ac appcontext.AppContext) {
 		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
 		return
 	}
-	ac.C.JSON(http.StatusOK, books)
+	var returnedBooks []query.BookSearchGet
+	if len(books) > 0 {
+		returnedBooks = books
+	} else {
+		queryResult, err := openlibrary.CallOpenLibrary(searchterm, limit, offset)
+		if err != nil {
+			myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+			return
+		}
+		returnedBooks = OpenLibraryBooksToBookSearchGet(queryResult.Books)
+	}
+	ac.C.JSON(http.StatusOK, returnedBooks)
+}
+
+func OpenLibraryBooksToBookSearchGet(OLbooks []openlibrary.OpenLibraryBook) []query.BookSearchGet {
+	var books []query.BookSearchGet
+	for _, b := range OLbooks {
+		bookSearchGet := query.BookSearchGet{
+			ID:            0,
+			Title:         b.Title,
+			Author:        b.Authors[0],
+			OpenLibraryId: b.OpenLibraryId,
+			Rating:        0,
+			Read:          false,
+			WantRead:      false,
+			CoverPath:     "",
+		}
+		books = append(books, bookSearchGet)
+	}
+	return books
 }
 
 func GetSearchBooksCountHandler(ac appcontext.AppContext) {
@@ -49,5 +79,16 @@ func GetSearchBooksCountHandler(ac appcontext.AppContext) {
 		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
 		return
 	}
-	ac.C.JSON(http.StatusOK, gin.H{"count": count})
+	var finalCount int64
+	if count > 0 {
+		finalCount = count
+	} else {
+		queryResult, err := openlibrary.CallOpenLibrary(searchterm, 0, 0)
+		if err != nil {
+			myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+			return
+		}
+		finalCount = int64(queryResult.NumFound)
+	}
+	ac.C.JSON(http.StatusOK, gin.H{"count": finalCount})
 }