management server listener (#17)

Reviewed-on: #17
Co-authored-by: David Ashby <delta.mu.alpha@gmail.com>
Co-committed-by: David Ashby <delta.mu.alpha@gmail.com>

query/openlibrary.go

@@ -0,0 +1,46 @@
+package query
+
+import (
+	"strings"
+
+	"git.yetaga.in/alazyreader/go-openlibrary/client"
+	"git.yetaga.in/alazyreader/library/media"
+)
+
+type OpenLibrary struct {
+	client client.Client
+}
+
+func (o *OpenLibrary) GetByISBN(isbn string) (*media.Book, error) {
+	details, err := o.client.GetByISBN(isbn)
+	if err != nil {
+		return nil, err
+	}
+	return openLibraryToBook(details), nil
+}
+
+func openLibraryToBook(details *client.BookDetails) *media.Book {
+	return &media.Book{
+		Title:      details.Title,
+		Authors:    getAuthors(details.Authors),
+		SortAuthor: strings.ToLower(getLastName(tryGetFirst(getAuthors(details.Authors)))),
+		Publisher:  getPublisher(details.Publishers),
+		ISBN10:     tryGetFirst(details.Identifiers.ISBN10),
+		ISBN13:     tryGetFirst(details.Identifiers.ISBN13),
+	}
+}
+
+func getPublisher(publishers []client.Publishers) string {
+	if len(publishers) == 0 {
+		return ""
+	}
+	return publishers[0].Name
+}
+
+func getAuthors(authors []client.Authors) []string {
+	ret := make([]string, len(authors))
+	for _, author := range authors {
+		ret = append(ret, author.Name)
+	}
+	return ret
+}