From 7bb9b3aa0b6fb874377a0a1a91e04eb11811bfa9 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Mon, 24 Feb 2020 18:13:24 +0100
Subject: [PATCH] caldav: add Client.PutCalendarObject

---
 caldav/client.go | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
 go.mod           |  2 +-
 go.sum           |  4 ++--
 3 files changed, 63 insertions(+), 3 deletions(-)

diff --git a/caldav/client.go b/caldav/client.go
index 1155703..c3771f0 100644
--- a/caldav/client.go
+++ b/caldav/client.go
@@ -3,6 +3,9 @@ package caldav
 import (
 	"bytes"
 	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
 	"time"
 
 	"github.com/emersion/go-ical"
@@ -211,3 +214,60 @@ func (c *Client) QueryCalendar(calendar string, query *CalendarQuery) ([]Calenda
 
 	return decodeCalendarObjectList(ms)
 }
+
+func populateCalendarObject(co *CalendarObject, resp *http.Response) error {
+	if loc := resp.Header.Get("Location"); loc != "" {
+		u, err := url.Parse(loc)
+		if err != nil {
+			return err
+		}
+		co.Path = u.Path
+	}
+	if etag := resp.Header.Get("ETag"); etag != "" {
+		etag, err := strconv.Unquote(etag)
+		if err != nil {
+			return err
+		}
+		co.ETag = etag
+	}
+	if lastModified := resp.Header.Get("Last-Modified"); lastModified != "" {
+		t, err := http.ParseTime(lastModified)
+		if err != nil {
+			return err
+		}
+		co.ModTime = t
+	}
+
+	return nil
+}
+
+func (c *Client) PutCalendarObject(path string, cal *ical.Calendar) (*CalendarObject, error) {
+	// TODO: add support for If-None-Match and If-Match
+
+	// TODO: some servers want a Content-Length header, so we can't stream the
+	// request body here. See the Radicale issue:
+	// https://github.com/Kozea/Radicale/issues/1016
+
+	var buf bytes.Buffer
+	if err := ical.NewEncoder(&buf).EncodeCalendar(cal); err != nil {
+		return nil, err
+	}
+
+	req, err := c.ic.NewRequest(http.MethodPut, path, &buf)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", ical.MIMEType)
+
+	resp, err := c.ic.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	resp.Body.Close()
+
+	co := &CalendarObject{Path: path}
+	if err := populateCalendarObject(co, resp); err != nil {
+		return nil, err
+	}
+	return co, nil
+}
diff --git a/go.mod b/go.mod
index 0c4f6f2..46c265b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module github.com/emersion/go-webdav
 go 1.13
 
 require (
-	github.com/emersion/go-ical v0.0.0-20200224161826-aa4584e92c62
+	github.com/emersion/go-ical v0.0.0-20200224170602-c9b8621220bc
 	github.com/emersion/go-vcard v0.0.0-20191221110513-5f81fa0d3cc7
 )
diff --git a/go.sum b/go.sum
index 1ccff55..c17f351 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,4 @@
-github.com/emersion/go-ical v0.0.0-20200224161826-aa4584e92c62 h1:kP9BxopsBc1jfYfHgbgnDBJeCfZt9GkyWXFmNOcRsps=
-github.com/emersion/go-ical v0.0.0-20200224161826-aa4584e92c62/go.mod h1:4xVTBPcT43a1pp3vdaa+FuRdX5XhKCZPpWv7m0z9ByM=
+github.com/emersion/go-ical v0.0.0-20200224170602-c9b8621220bc h1:kpISLFxf4eYcslxD/XkzE2Su7UQdNKt0XYgnN6MEUxg=
+github.com/emersion/go-ical v0.0.0-20200224170602-c9b8621220bc/go.mod h1:4xVTBPcT43a1pp3vdaa+FuRdX5XhKCZPpWv7m0z9ByM=
 github.com/emersion/go-vcard v0.0.0-20191221110513-5f81fa0d3cc7 h1:SE+tcd+0kn0cT4MqTo66gmkjqWHF1Z+Yha5/rhLs/H8=
 github.com/emersion/go-vcard v0.0.0-20191221110513-5f81fa0d3cc7/go.mod h1:HMJKR5wlh/ziNp+sHEDV2ltblO4JD2+IdDOWtGcQBTM=