From 6aea0eda2d54c6b57d77b764a62b311316b58d52 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Thu, 30 Jan 2020 13:18:05 +0100
Subject: [PATCH] caldav: add Client boilerplate

---
 caldav/caldav.go   |  4 ++++
 caldav/client.go   | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 caldav/elements.go | 17 +++++++++++++++++
 carddav/carddav.go |  2 +-
 4 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 caldav/caldav.go
 create mode 100644 caldav/client.go
 create mode 100644 caldav/elements.go

diff --git a/caldav/caldav.go b/caldav/caldav.go
new file mode 100644
index 0000000..1f53364
--- /dev/null
+++ b/caldav/caldav.go
@@ -0,0 +1,4 @@
+// Package caldav provides a client and server CalDAV implementation.
+//
+// CalDAV is defined in RFC 4791.
+package caldav
diff --git a/caldav/client.go b/caldav/client.go
new file mode 100644
index 0000000..99594a6
--- /dev/null
+++ b/caldav/client.go
@@ -0,0 +1,47 @@
+package caldav
+
+import (
+	"net/http"
+
+	"github.com/emersion/go-webdav"
+	"github.com/emersion/go-webdav/internal"
+)
+
+// Client provides access to a remote CardDAV server.
+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) SetBasicAuth(username, password string) {
+	c.Client.SetBasicAuth(username, password)
+	c.ic.SetBasicAuth(username, password)
+}
+
+func (c *Client) FindCalendarHomeSet(principal string) (string, error) {
+	propfind := internal.NewPropNamePropfind(calendarHomeSetName)
+	resp, err := c.ic.PropfindFlat(principal, propfind)
+	if err != nil {
+		return "", err
+	}
+
+	var prop calendarHomeSet
+	if err := resp.DecodeProp(&prop); err != nil {
+		return "", err
+	}
+
+	return prop.Href.Path, nil
+}
diff --git a/caldav/elements.go b/caldav/elements.go
new file mode 100644
index 0000000..c6706f4
--- /dev/null
+++ b/caldav/elements.go
@@ -0,0 +1,17 @@
+package caldav
+
+import (
+	"encoding/xml"
+
+	"github.com/emersion/go-webdav/internal"
+)
+
+const namespace = "urn:ietf:params:xml:ns:caldav"
+
+var calendarHomeSetName = xml.Name{namespace, "calendar-home-set"}
+
+// https://tools.ietf.org/html/rfc4791#section-6.2.1
+type calendarHomeSet struct {
+	XMLName xml.Name      `xml:"urn:ietf:params:xml:ns:caldav calendar-home-set"`
+	Href    internal.Href `xml:"DAV: href"`
+}
diff --git a/carddav/carddav.go b/carddav/carddav.go
index 7d49c19..9a3dc8b 100644
--- a/carddav/carddav.go
+++ b/carddav/carddav.go
@@ -71,7 +71,7 @@ const (
 )
 
 type AddressBookMultiGet struct {
-	Paths []string
+	Paths       []string
 	DataRequest AddressDataRequest
 }