carddav: add very basic Client

carddav/client.go

@@ -0,0 +1,44 @@
+package carddav
+
+import (
+	"encoding/xml"
+	"net/http"
+
+	"github.com/emersion/go-webdav"
+	"github.com/emersion/go-webdav/internal"
+)
+
+type Client struct {
+	*webdav.Client
+
+	ic *internal.Client
+}
+
+func NewClient(c *http.Client, endpoint string) (*Client, error) {
+	wc, err := webdav.NewClient(c, endpoint)
+	if err != nil {
+		return nil, err
+	}
+	ic, err := internal.NewClient(c, endpoint)
+	if err != nil {
+		return nil, err
+	}
+	return &Client{wc, ic}, nil
+}
+
+func (c *Client) FindAddressbookHomeSet(principal string) (string, error) {
+	name := xml.Name{namespace, "addressbook-home-set"}
+	propfind := internal.NewPropPropfind(name)
+
+	resp, err := c.ic.PropfindFlat(principal, propfind)
+	if err != nil {
+		return "", err
+	}
+
+	var prop addressbookHomeSet
+	if err := resp.DecodeProp(name, &prop); err != nil {
+		return "", err
+	}
+
+	return prop.Href, nil
+}