Better caldav support (#73)

vendor/github.com/samedi/caldav-go/ixml/ixml.go

@@ -0,0 +1,94 @@
+package ixml
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+
+	"github.com/samedi/caldav-go/lib"
+)
+
+const (
+	DAV_NS     = "DAV:"
+	CALDAV_NS  = "urn:ietf:params:xml:ns:caldav"
+	CALSERV_NS = "http://calendarserver.org/ns/"
+)
+
+var NS_PREFIXES = map[string]string{
+	DAV_NS:     "D",
+	CALDAV_NS:  "C",
+	CALSERV_NS: "CS",
+}
+
+var (
+	CALENDAR_TG                         = xml.Name{CALDAV_NS, "calendar"}
+	CALENDAR_DATA_TG                    = xml.Name{CALDAV_NS, "calendar-data"}
+	CALENDAR_HOME_SET_TG                = xml.Name{CALDAV_NS, "calendar-home-set"}
+	CALENDAR_QUERY_TG                   = xml.Name{CALDAV_NS, "calendar-query"}
+	CALENDAR_MULTIGET_TG                = xml.Name{CALDAV_NS, "calendar-multiget"}
+	CALENDAR_USER_ADDRESS_SET_TG        = xml.Name{CALDAV_NS, "calendar-user-address-set"}
+	COLLECTION_TG                       = xml.Name{DAV_NS, "collection"}
+	CURRENT_USER_PRINCIPAL_TG           = xml.Name{DAV_NS, "current-user-principal"}
+	DISPLAY_NAME_TG                     = xml.Name{DAV_NS, "displayname"}
+	GET_CONTENT_LENGTH_TG               = xml.Name{DAV_NS, "getcontentlength"}
+	GET_CONTENT_TYPE_TG                 = xml.Name{DAV_NS, "getcontenttype"}
+	GET_CTAG_TG                         = xml.Name{CALSERV_NS, "getctag"}
+	GET_ETAG_TG                         = xml.Name{DAV_NS, "getetag"}
+	GET_LAST_MODIFIED_TG                = xml.Name{DAV_NS, "getlastmodified"}
+	HREF_TG                             = xml.Name{DAV_NS, "href"}
+	OWNER_TG                            = xml.Name{DAV_NS, "owner"}
+	PRINCIPAL_TG                        = xml.Name{DAV_NS, "principal"}
+	PRINCIPAL_COLLECTION_SET_TG         = xml.Name{DAV_NS, "principal-collection-set"}
+	PRINCIPAL_URL_TG                    = xml.Name{DAV_NS, "principal-URL"}
+	RESOURCE_TYPE_TG                    = xml.Name{DAV_NS, "resourcetype"}
+	STATUS_TG                           = xml.Name{DAV_NS, "status"}
+	SUPPORTED_CALENDAR_COMPONENT_SET_TG = xml.Name{CALDAV_NS, "supported-calendar-component-set"}
+)
+
+// Namespaces returns the default XML namespaces in for CalDAV contents.
+func Namespaces() string {
+	bf := new(lib.StringBuffer)
+	bf.Write(`xmlns:%s="%s" `, NS_PREFIXES[DAV_NS], DAV_NS)
+	bf.Write(`xmlns:%s="%s" `, NS_PREFIXES[CALDAV_NS], CALDAV_NS)
+	bf.Write(`xmlns:%s="%s"`, NS_PREFIXES[CALSERV_NS], CALSERV_NS)
+
+	return bf.String()
+}
+
+// Tag returns a XML tag as string based on the given tag name and content. It
+// takes in consideration the namespace and also if it is an empty content or not.
+func Tag(xmlName xml.Name, content string) string {
+	name := xmlName.Local
+	ns := NS_PREFIXES[xmlName.Space]
+
+	if ns != "" {
+		ns = ns + ":"
+	}
+
+	if content != "" {
+		return fmt.Sprintf("<%s%s>%s</%s%s>", ns, name, content, ns, name)
+	} else {
+		return fmt.Sprintf("<%s%s/>", ns, name)
+	}
+}
+
+// HrefTag returns a DAV <D:href> tag with the given href path.
+func HrefTag(href string) (tag string) {
+	return Tag(HREF_TG, href)
+}
+
+// StatusTag returns a DAV <D:status> tag with the given HTTP status. The
+// status is translated into a label, e.g.: HTTP/1.1 404 NotFound.
+func StatusTag(status int) string {
+	statusText := fmt.Sprintf("HTTP/1.1 %d %s", status, http.StatusText(status))
+	return Tag(STATUS_TG, statusText)
+}
+
+// EscapeText escapes any special character in the given text and returns the result.
+func EscapeText(text string) string {
+	buffer := bytes.NewBufferString("")
+	xml.EscapeText(buffer, []byte(text))
+
+	return buffer.String()
+}