carddav: add Client.QueryAddressBook

carddav/carddav.go

@@ -2,6 +2,8 @@ package carddav
 
 import (
 	"encoding/xml"
+
+	"github.com/emersion/go-vcard"
 )
 
 const namespace = "urn:ietf:params:xml:ns:carddav"
@@ -14,5 +16,10 @@ type AddressBook struct {
 var addressBookName = xml.Name{namespace, "addressbook"}
 
 type AddressBookQuery struct {
-	AddressDataProps []string
+	Props []string
+}
+
+type Address struct {
+	Href string
+	Card vcard.Card
 }

carddav/client.go

@@ -1,9 +1,11 @@
 package carddav
 
 import (
+	"bytes"
 	"encoding/xml"
 	"net/http"
 
+	"github.com/emersion/go-vcard"
 	"github.com/emersion/go-webdav"
 	"github.com/emersion/go-webdav/internal"
 )
@@ -61,8 +63,7 @@ func (c *Client) FindAddressBooks(addressBookHomeSet string) ([]AddressBook, err
 	}
 
 	l := make([]AddressBook, 0, len(ms.Responses))
-	for i := range ms.Responses {
-		resp := &ms.Responses[i]
+	for _, resp := range ms.Responses {
 		href, err := resp.Href()
 		if err != nil {
 			return nil, err
@@ -89,3 +90,56 @@ func (c *Client) FindAddressBooks(addressBookHomeSet string) ([]AddressBook, err
 
 	return l, nil
 }
+
+func (c *Client) QueryAddressBook(addressBook string, query *AddressBookQuery) ([]Address, error) {
+	// TODO: add a better way to format the request
+	addrProps := make([]internal.RawXMLValue, 0, len(query.Props))
+	for _, name := range query.Props {
+		addrProps = append(addrProps, *newProp(name, false))
+	}
+
+	addrDataName := xml.Name{namespace, "address-data"}
+	addrDataReq := internal.NewRawXMLElement(addrDataName, nil, addrProps)
+
+	addressbookQuery := addressbookQuery{
+		Prop: &internal.Prop{Raw: []internal.RawXMLValue{*addrDataReq}},
+	}
+
+	req, err := c.ic.NewXMLRequest("REPORT", addressBook, &addressbookQuery)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Add("Depth", "1")
+
+	ms, err := c.ic.DoMultiStatus(req)
+	if err != nil {
+		return nil, err
+	}
+
+	addrs := make([]Address, 0, len(ms.Responses))
+	for _, resp := range ms.Responses {
+		href, err := resp.Href()
+		if err != nil {
+			return nil, err
+		}
+
+		var addrData addressDataResp
+		if err := resp.DecodeProp(addrDataName, &addrData); err != nil {
+			return nil, err
+		}
+
+		r := bytes.NewReader(addrData.Data)
+		card, err := vcard.NewDecoder(r).Decode()
+		if err != nil {
+			return nil, err
+		}
+
+		addrs = append(addrs, Address{
+			Href: href,
+			Card: card,
+		})
+	}
+
+	return addrs, nil
+}

carddav/elements.go

@@ -2,6 +2,8 @@ package carddav
 
 import (
 	"encoding/xml"
+
+	"github.com/emersion/go-webdav/internal"
 )
 
 type addressbookHomeSet struct {
@@ -21,3 +23,33 @@ type addressbookQuery struct {
 	// TODO: DAV:allprop | DAV:propname
 	// TODO: filter, limit?
 }
+
+func newProp(name string, noValue bool) *internal.RawXMLValue {
+	attrs := []xml.Attr{{Name: xml.Name{namespace, "name"}, Value: name}}
+	if noValue {
+		attrs = append(attrs, xml.Attr{Name: xml.Name{namespace, "novalue"}, Value: "yes"})
+	}
+
+	xmlName := xml.Name{namespace, "prop"}
+	return internal.NewRawXMLElement(xmlName, attrs, nil)
+}
+
+// https://tools.ietf.org/html/rfc6352#section-10.4
+type addressDataReq struct {
+	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:carddav address-data"`
+	Props   []prop   `xml:"prop"`
+	// TODO: allprop
+}
+
+// https://tools.ietf.org/html/rfc6352#section-10.4.2
+type prop struct {
+	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:carddav prop"`
+	Name    string   `xml:"name,attr"`
+	// TODO: novalue
+}
+
+// https://tools.ietf.org/html/rfc6352#section-10.4
+type addressDataResp struct {
+	XMLName xml.Name `xml:"urn:ietf:params:xml:ns:carddav address-data"`
+	Data    []byte   `xml:",chardata"`
+}

go.mod

@@ -1,3 +1,5 @@
 module github.com/emersion/go-webdav
 
 go 1.13
+
+require github.com/emersion/go-vcard v0.0.0-20191221110513-5f81fa0d3cc7