Improve detection and fast-fail on empty Sendgrid template paths

src/main/java/io/kamax/mxisd/threepid/generator/PlaceholderNotificationGenerator.java

@@ -27,8 +27,8 @@ import io.kamax.mxisd.http.IsAPIv1;
 import io.kamax.mxisd.invitation.IMatrixIdInvite;
 import io.kamax.mxisd.invitation.IThreePidInviteReply;
 import io.kamax.mxisd.threepid.session.IThreePidSession;
-import org.apache.commons.lang.StringUtils;
 import org.apache.commons.lang.WordUtils;
+import org.apache.commons.lang3.StringUtils;
 
 import static io.kamax.mxisd.http.io.identity.StoreInviteRequest.Keys.RoomName;
 import static io.kamax.mxisd.http.io.identity.StoreInviteRequest.Keys.SenderDisplayName;
@@ -46,6 +46,10 @@ public abstract class PlaceholderNotificationGenerator {
     }
 
     protected String populateForCommon(ThreePid recipient, String input) {
+        if (StringUtils.isBlank(input)) {
+            return input;
+        }
+
         String domainPretty = WordUtils.capitalizeFully(mxCfg.getDomain());
 
         return input
@@ -56,6 +60,10 @@ public abstract class PlaceholderNotificationGenerator {
     }
 
     protected String populateForInvite(IMatrixIdInvite invite, String input) {
+        if (StringUtils.isBlank(input)) {
+            return input;
+        }
+
         String senderName = invite.getProperties().getOrDefault(SenderDisplayName, "");
         String senderNameOrId = StringUtils.defaultIfBlank(senderName, invite.getSender().getId());
         String roomName = invite.getProperties().getOrDefault(RoomName, "");
@@ -72,6 +80,10 @@ public abstract class PlaceholderNotificationGenerator {
     }
 
     protected String populateForReply(IThreePidInviteReply invite, String input) {
+        if (StringUtils.isBlank(input)) {
+            return input;
+        }
+
         ThreePid tpid = new ThreePid(invite.getInvite().getMedium(), invite.getInvite().getAddress());
 
         String senderName = invite.getInvite().getProperties().getOrDefault(SenderDisplayName, "");
@@ -93,6 +105,10 @@ public abstract class PlaceholderNotificationGenerator {
     }
 
     protected String populateForValidation(IThreePidSession session, String input) {
+        if (StringUtils.isBlank(input)) {
+            return input;
+        }
+
         String validationLink = srvCfg.getPublicUrl() + IsAPIv1.getValidate(
                 session.getThreePid().getMedium(),
                 session.getId(),

src/main/java/io/kamax/mxisd/threepid/notification/email/EmailSendGridNotificationHandler.java

@@ -33,7 +33,7 @@ import io.kamax.mxisd.notification.NotificationHandler;
 import io.kamax.mxisd.threepid.generator.PlaceholderNotificationGenerator;
 import io.kamax.mxisd.threepid.session.IThreePidSession;
 import io.kamax.mxisd.util.FileUtil;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -86,6 +86,9 @@ public class EmailSendGridNotificationHandler extends PlaceholderNotificationGen
     @Override
     public void sendForInvite(IMatrixIdInvite invite) {
         EmailTemplate template = cfg.getTemplates().getGeneric().get("matrixId");
+        if (StringUtils.isAllBlank(template.getBody().getText(), template.getBody().getHtml())) {
+            throw new FeatureNotAvailable("No template has been configured for Matrix ID invite notifications");
+        }
 
         Email email = getEmail();
         email.setSubject(populateForInvite(invite, template.getSubject()));
@@ -98,6 +101,10 @@ public class EmailSendGridNotificationHandler extends PlaceholderNotificationGen
     @Override
     public void sendForReply(IThreePidInviteReply invite) {
         EmailTemplate template = cfg.getTemplates().getInvite();
+        if (StringUtils.isAllBlank(template.getBody().getText(), template.getBody().getHtml())) {
+            throw new FeatureNotAvailable("No template has been configured for 3PID invite notifications");
+        }
+
         Email email = getEmail();
         email.setSubject(populateForReply(invite, template.getSubject()));
         email.setText(populateForReply(invite, getFromFile(template.getBody().getText())));
@@ -109,6 +116,10 @@ public class EmailSendGridNotificationHandler extends PlaceholderNotificationGen
     @Override
     public void sendForValidation(IThreePidSession session) {
         EmailTemplate template = cfg.getTemplates().getSession().getValidation();
+        if (StringUtils.isAllBlank(template.getBody().getText(), template.getBody().getHtml())) {
+            throw new FeatureNotAvailable("No template has been configured for validation notifications");
+        }
+
         Email email = getEmail();
         email.setSubject(populateForValidation(session, template.getSubject()));
         email.setText(populateForValidation(session, getFromFile(template.getBody().getText())));
@@ -120,6 +131,10 @@ public class EmailSendGridNotificationHandler extends PlaceholderNotificationGen
     @Override
     public void sendForFraudulentUnbind(ThreePid tpid) {
         EmailTemplate template = cfg.getTemplates().getSession().getUnbind().getFraudulent();
+        if (StringUtils.isAllBlank(template.getBody().getText(), template.getBody().getHtml())) {
+            throw new FeatureNotAvailable("No template has been configured for fraudulent unbind notifications");
+        }
+
         Email email = getEmail();
         email.setSubject(populateForCommon(tpid, template.getSubject()));
         email.setText(populateForCommon(tpid, getFromFile(template.getBody().getText())));