carddav: add Client.FindAddressBooks

carddav/carddav.go

@@ -1,3 +1,18 @@
 package carddav
 
+import (
+	"encoding/xml"
+)
+
 const namespace = "urn:ietf:params:xml:ns:carddav"
+
+type AddressBook struct {
+	Href        string
+	Description string
+}
+
+var addressBookName = xml.Name{namespace, "addressbook"}
+
+type AddressBookQuery struct {
+	AddressDataProps []string
+}

carddav/client.go

@@ -26,7 +26,7 @@ func NewClient(c *http.Client, endpoint string) (*Client, error) {
 	return &Client{wc, ic}, nil
 }
 
-func (c *Client) FindAddressbookHomeSet(principal string) (string, error) {
+func (c *Client) FindAddressBookHomeSet(principal string) (string, error) {
 	name := xml.Name{namespace, "addressbook-home-set"}
 	propfind := internal.NewPropPropfind(name)
 
@@ -42,3 +42,50 @@ func (c *Client) FindAddressbookHomeSet(principal string) (string, error) {
 
 	return prop.Href, nil
 }
+
+func (c *Client) FindAddressBooks(addressBookHomeSet string) ([]AddressBook, error) {
+	resTypeName := xml.Name{"DAV:", "resourcetype"}
+	descName := xml.Name{namespace, "addressbook-description"}
+	propfind := internal.NewPropPropfind(resTypeName, descName)
+
+	req, err := c.ic.NewXMLRequest("PROPFIND", addressBookHomeSet, propfind)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Add("Depth", "1")
+
+	ms, err := c.ic.DoMultiStatus(req)
+	if err != nil {
+		return nil, err
+	}
+
+	l := make([]AddressBook, 0, len(ms.Responses))
+	for i := range ms.Responses {
+		resp := &ms.Responses[i]
+		href, err := resp.Href()
+		if err != nil {
+			return nil, err
+		}
+
+		var resTypeProp internal.ResourceType
+		if err := resp.DecodeProp(resTypeName, &resTypeProp); err != nil {
+			return nil, err
+		}
+		if !resTypeProp.Is(addressBookName) {
+			continue
+		}
+
+		var descProp addressbookDescription
+		if err := resp.DecodeProp(descName, &descProp); err != nil {
+			return nil, err
+		}
+
+		l = append(l, AddressBook{
+			Href:        href,
+			Description: descProp.Data,
+		})
+	}
+
+	return l, nil
+}

carddav/elements.go

@@ -5,6 +5,19 @@ import (
 )
 
 type addressbookHomeSet struct {
-	Name xml.Name `xml:"urn:ietf:params:xml:ns:carddav addressbook-home-set"`
-	Href string   `xml:"href"`
+	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:carddav addressbook-home-set"`
+	Href    string   `xml:"href"`
+}
+
+type addressbookDescription struct {
+	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:carddav addressbook-description"`
+	Data    string   `xml:",chardata"`
+}
+
+// https://tools.ietf.org/html/rfc6352#section-10.3
+type addressbookQuery struct {
+	XMLName xml.Name       `xml:"urn:ietf:params:xml:ns:carddav addressbook-query"`
+	Prop    *internal.Prop `xml:"DAV: prop,omitempty"`
+	// TODO: DAV:allprop | DAV:propname
+	// TODO: filter, limit?
 }

elements.go

@@ -5,6 +5,6 @@ import (
 )
 
 type currentUserPrincipal struct {
-	Name xml.Name `xml:"DAV: current-user-principal"`
-	Href string   `xml:"href"`
+	XMLName xml.Name `xml:"DAV: current-user-principal"`
+	Href    string   `xml:"href"`
 }

internal/client.go

@@ -56,7 +56,7 @@ func (c *Client) NewXMLRequest(method string, href string, v interface{}) (*http
 
 func (c *Client) Do(req *http.Request) (*http.Response, error) {
 	// TODO: remove this quirk
-	req.SetBasicAuth("simon", "")
+	req.SetBasicAuth("emersion", "")
 	return c.http.Do(req)
 }
 

internal/elements.go

@@ -42,7 +42,7 @@ type Multistatus struct {
 func (ms *Multistatus) Get(href string) (*Response, error) {
 	for i := range ms.Responses {
 		resp := &ms.Responses[i]
-		for _, h := range resp.Href {
+		for _, h := range resp.Hrefs {
 			if h == href {
 				return resp, nil
 			}
@@ -55,7 +55,7 @@ func (ms *Multistatus) Get(href string) (*Response, error) {
 // https://tools.ietf.org/html/rfc4918#section-14.24
 type Response struct {
 	XMLName             xml.Name     `xml:"DAV: response"`
-	Href                []string     `xml:"href"`
+	Hrefs               []string     `xml:"href"`
 	Propstats           []Propstat   `xml:"propstat,omitempty"`
 	ResponseDescription string       `xml:"responsedescription,omitempty"`
 	Status              Status       `xml:"status,omitempty"`
@@ -63,6 +63,16 @@ type Response struct {
 	Location            *Location    `xml:"location,omitempty"`
 }
 
+func (resp *Response) Href() (string, error) {
+	if err := resp.Status.Err(); err != nil {
+		return "", err
+	}
+	if len(resp.Hrefs) != 1 {
+		return "", fmt.Errorf("webdav: malformed response: expected exactly one href element, got %v", len(resp.Hrefs))
+	}
+	return resp.Hrefs[0], nil
+}
+
 func (resp *Response) DecodeProp(name xml.Name, v interface{}) error {
 	if err := resp.Status.Err(); err != nil {
 		return err
@@ -71,13 +81,11 @@ func (resp *Response) DecodeProp(name xml.Name, v interface{}) error {
 		propstat := &resp.Propstats[i]
 		for j := range propstat.Prop.Raw {
 			raw := &propstat.Prop.Raw[j]
-			if start, ok := raw.tok.(xml.StartElement); ok {
-				if name == start.Name {
-					if err := propstat.Status.Err(); err != nil {
-						return err
-					}
-					return raw.Decode(v)
+			if start, ok := raw.tok.(xml.StartElement); ok && name == start.Name {
+				if err := propstat.Status.Err(); err != nil {
+					return err
 				}
+				return raw.Decode(v)
 			}
 		}
 	}
@@ -120,3 +128,20 @@ func NewPropPropfind(names ...xml.Name) *Propfind {
 	}
 	return &Propfind{Prop: &Prop{Raw: children}}
 }
+
+// https://tools.ietf.org/html/rfc4918#section-15.9
+type ResourceType struct {
+	XMLName xml.Name      `xml:"DAV: resourcetype"`
+	Raw     []RawXMLValue `xml:",any"`
+}
+
+func (t *ResourceType) Is(name xml.Name) bool {
+	for _, raw := range t.Raw {
+		if start, ok := raw.tok.(xml.StartElement); ok && name == start.Name {
+			return true
+		}
+	}
+	return false
+}
+
+var CollectionName = xml.Name{"DAV:", "collection"}