feat: implement caldav search

vendor/github.com/dolanor/caldav-go/webdav/response.go

@@ -0,0 +1,54 @@
+package webdav
+
+import (
+	"encoding/xml"
+	"github.com/dolanor/caldav-go/http"
+	"github.com/dolanor/caldav-go/utils"
+	"io/ioutil"
+	"log"
+	"strings"
+)
+
+var _ = log.Print
+var _ = ioutil.ReadAll
+
+// a WebDAV response object
+type Response http.Response
+
+// downcasts the response to the local HTTP interface
+func (r *Response) Http() *http.Response {
+	return (*http.Response)(r)
+}
+
+// returns a list of WebDAV features found in the response
+func (r *Response) Features() (features []string) {
+	if dav := r.Header.Get("DAV"); dav != "" {
+		features = strings.Split(dav, ", ")
+	}
+	return
+}
+
+// decodes a WebDAV XML response into the provided interface
+func (r *Response) Decode(into interface{}) error {
+	//	data, _ := ioutil.ReadAll(r.Body)
+	//	log.Printf("[WebDAV Response]\n%+v\n", string(data))
+	//	if err := xml.Unmarshal(data, into); err != nil {
+	//		return utils.NewError(r.Decode, "unable to decode response body", r, err)
+	//	} else {
+	//		return nil
+	//	}
+	if body := r.Body; body == nil {
+		return nil
+	} else if decoder := xml.NewDecoder(body); decoder == nil {
+		return nil
+	} else if err := decoder.Decode(into); err != nil {
+		return utils.NewError(r.Decode, "unable to decode response body", r, err)
+	} else {
+		return nil
+	}
+}
+
+// creates a new WebDAV response object
+func NewResponse(response *http.Response) *Response {
+	return (*Response)(response)
+}