Certificates Renewal + SSE

- Certificate renewal is just a re-request as it's forced already
- Rejig the routes for readability
- Added Server Side Events so that the UI would invalidate the
cache when changes happen on the backend, such as certs being
provided or failing
- Added a SSE Token, which has the same shelf life as normal token
but can't be used interchangeably. The reason for this is, the
SSE endpoint needs a token for auth as a Query param, so it would
be stored in log files. If someone where to get a hold of that,
it's pretty useless as it can't be used to change anything, only
to listen for events until it expires
- Added test endpoint for SSE testing only availabe in debug mode

backend/internal/entity/certificate/model.go

@@ -14,6 +14,7 @@ import (
 	"npm/internal/entity/dnsprovider"
 	"npm/internal/entity/user"
 	"npm/internal/logger"
+	"npm/internal/serverevents"
 	"npm/internal/types"
 	"npm/internal/util"
 
@@ -123,6 +124,9 @@ func (m *Model) Delete() bool {
 	if err := m.Save(); err != nil {
 		return false
 	}
+
+	// todo: delete from acme.sh as well
+
 	return true
 }
 
@@ -239,6 +243,7 @@ func (m *Model) GetCertificateLocations() (string, string, string) {
 // Request makes a certificate request
 func (m *Model) Request() error {
 	logger.Info("Requesting certificate for: #%d %v", m.ID, m.Name)
+	serverevents.SendChange("certificates")
 
 	// nolint: errcheck, gosec
 	m.Expand([]string{"certificate-authority", "dns-provider"})
@@ -283,6 +288,7 @@ func (m *Model) Request() error {
 		return err
 	}
 
+	serverevents.SendChange("certificates")
 	logger.Info("Request for certificate for: #%d %v was completed", m.ID, m.Name)
 	return nil
 }