From 1f956b4e6476d8d845a74a64c824d42e82a0c3e8 Mon Sep 17 00:00:00 2001
From: cgeorgilakis-grnet <cgeorgilakis@admin.grnet.gr>
Date: Fri, 22 Nov 2024 12:41:18 +0200
Subject: [PATCH] Fix problem sending email from background process

---
 CHANGELOG.md                                  |  6 +++
 pom.xml                                       |  2 +-
 ...CustomFreeMarkerEmailTemplateProvider.java | 47 +++++++++++++++++++
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f46f9e..515dca9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes in keycloak-group-management will be documented in this file
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.2] - 2024-11-21
+
+### Fixed
+- Fix problem sending email from background process
+
+
 ## [1.0.1] - 2024-11-21
 
 ### Changed
diff --git a/pom.xml b/pom.xml
index 4f3b113..3a1100c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
         <quarkus.version>3.2.7.Final</quarkus.version>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
-        <agm-version>1.0.1</agm-version>
+        <agm-version>1.0.2</agm-version>
     </properties>
 
     <dependencies>
diff --git a/src/main/java/org/rciam/plugins/groups/email/CustomFreeMarkerEmailTemplateProvider.java b/src/main/java/org/rciam/plugins/groups/email/CustomFreeMarkerEmailTemplateProvider.java
index f0df6a6..6eb754a 100644
--- a/src/main/java/org/rciam/plugins/groups/email/CustomFreeMarkerEmailTemplateProvider.java
+++ b/src/main/java/org/rciam/plugins/groups/email/CustomFreeMarkerEmailTemplateProvider.java
@@ -1,17 +1,26 @@
 package org.rciam.plugins.groups.email;
 
 import java.net.URI;
+import java.text.MessageFormat;
 import java.time.LocalDate;
 import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Properties;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.apache.commons.lang3.StringUtils;
 import org.keycloak.email.EmailException;
 import org.keycloak.email.freemarker.FreeMarkerEmailTemplateProvider;
+import org.keycloak.email.freemarker.beans.ProfileBean;
+import org.keycloak.forms.login.freemarker.model.UrlBean;
 import org.keycloak.models.KeycloakSession;
 import org.keycloak.models.KeycloakUriInfo;
 import org.keycloak.models.UserModel;
+import org.keycloak.theme.FreeMarkerException;
+import org.keycloak.theme.Theme;
+import org.keycloak.theme.beans.MessageFormatterMethod;
 import org.rciam.plugins.groups.helpers.Utils;
 
 public class CustomFreeMarkerEmailTemplateProvider extends FreeMarkerEmailTemplateProvider {
@@ -392,5 +401,43 @@ private String rolesHtmlStrCalculation(List<String> roles) {
         return sb.toString();
     }
 
+    //override method in order not to have problem with finding Keycloak url from request
+    //This does not work with background process like notification and membership expiration emails
+    @Override
+    protected EmailTemplate processTemplate(String subjectKey, List<Object> subjectAttributes, String template, Map<String, Object> attributes) throws EmailException {
+        try {
+            Theme theme = getTheme();
+            Locale locale = session.getContext().resolveLocale(user);
+            attributes.put("locale", locale);
+
+            Properties messages = theme.getEnhancedMessages(realm, locale);
+            attributes.put("msg", new MessageFormatterMethod(locale, messages));
+
+            attributes.put("properties", theme.getProperties());
+            attributes.put("realmName", getRealmName());
+            attributes.put("user", new ProfileBean(user));
+
+            String subject = new MessageFormat(messages.getProperty(subjectKey, subjectKey), locale).format(subjectAttributes.toArray());
+            String textTemplate = String.format("text/%s", template);
+            String textBody;
+            try {
+                textBody = freeMarker.processTemplate(attributes, textTemplate, theme);
+            } catch (final FreeMarkerException e) {
+                throw new EmailException("Failed to template plain text email.", e);
+            }
+            String htmlTemplate = String.format("html/%s", template);
+            String htmlBody;
+            try {
+                htmlBody = freeMarker.processTemplate(attributes, htmlTemplate, theme);
+            } catch (final FreeMarkerException e) {
+                throw new EmailException("Failed to template html email.", e);
+            }
+
+            return new EmailTemplate(subject, textBody, htmlBody);
+        } catch (Exception e) {
+            throw new EmailException("Failed to template email", e);
+        }
+    }
+
 
 }