Better caldav support (#73)

vendor/github.com/samedi/caldav-go/handlers/delete.go

@@ -0,0 +1,40 @@
+package handlers
+
+import (
+	"github.com/samedi/caldav-go/global"
+	"net/http"
+)
+
+type deleteHandler struct {
+	request  *http.Request
+	response *Response
+}
+
+func (dh deleteHandler) Handle() *Response {
+	precond := requestPreconditions{dh.request}
+
+	// get the event from the storage
+	resource, _, err := global.Storage.GetShallowResource(dh.request.URL.Path)
+	if err != nil {
+		return dh.response.SetError(err)
+	}
+
+	// TODO: Handle delete on collections
+	if resource.IsCollection() {
+		return dh.response.Set(http.StatusMethodNotAllowed, "")
+	}
+
+	// check ETag pre-condition
+	resourceEtag, _ := resource.GetEtag()
+	if !precond.IfMatch(resourceEtag) {
+		return dh.response.Set(http.StatusPreconditionFailed, "")
+	}
+
+	// delete event after pre-condition passed
+	err = global.Storage.DeleteResource(resource.Path)
+	if err != nil {
+		return dh.response.SetError(err)
+	}
+
+	return dh.response.Set(http.StatusNoContent, "")
+}