Switch from open library API to Inventaire API

internal/callapiutils/callapiutils.go

@@ -0,0 +1,66 @@
+package callapiutils
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+)
+
+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()
+}
+
+func FetchAndParseResult[T any](u *url.URL, queryResult *T) error {
+	resp, err := DoApiQuery(u)
+	if err != nil {
+		return err
+	}
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		bodyError, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return err
+		}
+		return fmt.Errorf("Call to %s returned code %d:\n%s", u.String(), resp.StatusCode, string(bodyError))
+	}
+
+	decoder := json.NewDecoder(resp.Body)
+	err = decoder.Decode(queryResult)
+	if err != nil {
+		return err
+	}
+	return err
+}
+
+func DoApiQuery(u *url.URL) (*http.Response, error) {
+	client := &http.Client{}
+	req, err := http.NewRequest("GET", u.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Add("Accept", "application/json")
+	req.Header.Add("User-Agent", "PersonalLibraryManager/0.1 (artlef@protonmail.com)")
+	return client.Do(req)
+}
+
+func ComputeUrl(baseUrl string, paths ...string) (*url.URL, error) {
+	u, err := url.Parse(baseUrl)
+	if err != nil {
+		return nil, err
+	}
+	for _, p := range paths {
+		u = u.JoinPath(p)
+	}
+	return u, nil
+}