Open Library search API

If nothing is found on the server, returns results from open library
API. Clicking on a book imports it.

internal/openlibrary/openlibrary.go

@@ -2,61 +2,44 @@ 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
+func computeOpenLibraryUrl(paths ...string) (*url.URL, error) {
 	baseUrl := "https://openlibrary.org"
-	booksApiUrl := "search.json"
 	u, err := url.Parse(baseUrl)
 	if err != nil {
-		return queryResult, err
+		return nil, err
 	}
-	u = u.JoinPath(booksApiUrl)
-	if limit != 0 {
-		addQueryParamInt(u, "limit", limit)
+	for _, p := range paths {
+		u = u.JoinPath(p)
 	}
-	if offset != 0 {
-		addQueryParamInt(u, "offset", offset)
-	}
-	addQueryParam(u, "q", searchterm)
-	client := &http.Client{}
-	req, err := http.NewRequest("GET", u.String(), nil)
+	return u, nil
+}
+
+func fetchAndParseResult[T any](u *url.URL, queryResult *T) error {
+	resp, err := doOpenLibraryQuery(u)
 	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
+		return err
 	}
 	defer resp.Body.Close()
 
-	bodyBytes, err := io.ReadAll(resp.Body)
+	decoder := json.NewDecoder(resp.Body)
+	err = decoder.Decode(queryResult)
+	return err
+}
+
+func doOpenLibraryQuery(u *url.URL) (*http.Response, error) {
+	client := &http.Client{}
+	req, err := http.NewRequest("GET", u.String(), nil)
 	if err != nil {
-		return queryResult, err
+		return nil, err
 	}
-	bodyString := string(bodyBytes)
-	decoder := json.NewDecoder(strings.NewReader(bodyString))
-	err = decoder.Decode(&queryResult)
-	return queryResult, err
+	req.Header.Add("Accept", "application/json")
+	req.Header.Add("User-Agent", "PersonalLibraryManager/0.1 (artlef@protonmail.com)")
+	return client.Do(req)
 }
 
 func addQueryParamInt(u *url.URL, paramName string, paramValue int) {