[Feature] Add possibility to add a role just by the mere presence in a guild

README.md

@@ -31,7 +31,8 @@ To sync roles from Discord -> Keycloak, do the following:
 1. Under the `discord` Identity Provider, fill out `Discord Roles mapping` value with the roles you want synced:
   - The format is `Discord-Guild-ID:Discord-Role-ID:Group-Name`, like so: `613425648685547541:613426529623605268:discord-devs-moderators`
   - You can specify multiple roles by separating them with commas: `613425648685547541:613426529623605268:discord-devs-moderators,613425648685547541:936746847437983786:discord-devs-modmail`
-2. Set up a Mapper under the `discord` Identity Provider:
+  - If you want to add a role just because the user is on the server, you can use the everyone role ID, which is the same as the guild ID : `613425648685547541:613425648685547541:everyone`
+3. Set up a Mapper under the `discord` Identity Provider:
   - Set Mapper Type to `Claim to Group Mapper`
   - Set Claim to `discord-groups`
   - Tick Create Groups if not exists

src/main/java/org/keycloak/social/discord/DiscordIdentityProvider.java

@@ -35,7 +35,6 @@ import org.keycloak.services.messages.Messages;
 
 import jakarta.ws.rs.core.Response;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
@@ -100,7 +99,7 @@ public class DiscordIdentityProvider extends AbstractOAuth2IdentityProvider<Disc
     @Override
     protected BrokeredIdentityContext doGetFederatedIdentity(String accessToken) {
         log.debug("doGetFederatedIdentity()");
-        JsonNode profile = null;
+        JsonNode profile;
         try {
             profile = SimpleHttp.doGet(PROFILE_URL, session).header("Authorization", "Bearer " + accessToken).asJson();
         } catch (Exception e) {
@@ -117,9 +116,12 @@ public class DiscordIdentityProvider extends AbstractOAuth2IdentityProvider<Disc
         if (getConfig().hasMappedRoles()) {
             Map<String, HashMap<String, String>> mappedRoles = getConfig().getMappedRolesAsMap();
             for (String guild : mappedRoles.keySet()) {
-                JsonNode guildMember = null;
+                JsonNode guildMember;
                 try {
                     guildMember = SimpleHttp.doGet(String.format(GUILD_MEMBER_URL, guild), session).header("Authorization", "Bearer " + accessToken).asJson();
+                    if (guildMember.has("joined_at") && mappedRoles.get(guild).containsKey(guild) ) {
+                        groups.add(mappedRoles.get(guild).get(guild));
+                    }
                     for (JsonNode role : guildMember.get("roles")) {
                         String roleString = role.textValue();
                         if (mappedRoles.get(guild).containsKey(roleString)) {
@@ -132,7 +134,7 @@ public class DiscordIdentityProvider extends AbstractOAuth2IdentityProvider<Disc
             }
         }
         if (profile instanceof ObjectNode) {
-            ((ObjectNode) profile).put("discord-groups", groups);
+            ((ObjectNode) profile).set("discord-groups", groups);
         }
 
         return extractIdentityFromProfile(null, profile);