added discord as know oidc provider

added unittest for merging discord oidc properties

docs/src/main/asciidoc/security-openid-connect-providers.adoc

@@ -481,6 +481,26 @@ quarkus.oidc.client-id=<Client ID>
 quarkus.oidc.credentials.client-secret.value=<Client Secret>
 ----
 
+[[discord]]
+=== Discord
+
+Create a https://discord.com/developers/applications[Discord application]:
+
+image::oidc-discord-1.png[role="thumb"]
+
+You now can get your client id and secret:
+
+image::oidc-discord-2.png[role="thumb"]
+
+You can now configure your `application.properties`:
+
+[source,properties]
+----
+quarkus.oidc.provider=discord
+quarkus.oidc.client-id=<Client ID>
+quarkus.oidc.credentials.client-secret=<Client Secret>
+----
+
 
 [[provider-scope]]
 == Provider scopes

extensions/oidc/runtime/src/main/java/io/quarkus/oidc/OidcTenantConfig.java

@@ -1655,6 +1655,7 @@ public static enum ApplicationType {
 
     public static enum Provider {
         APPLE,
+        DISCORD,
         FACEBOOK,
         GITHUB,
         GOOGLE,

extensions/oidc/runtime/src/main/java/io/quarkus/oidc/runtime/providers/KnownOidcProviders.java

@@ -13,6 +13,8 @@ public static OidcTenantConfig provider(OidcTenantConfig.Provider provider) {
         switch (provider) {
             case APPLE:
                 return apple();
+            case DISCORD:
+                return discord();
             case FACEBOOK:
                 return facebook();
             case GITHUB:
@@ -163,4 +165,18 @@ private static OidcTenantConfig twitch() {
         ret.getCredentials().getClientSecret().setMethod(Method.POST);
         return ret;
     }
+
+    private static OidcTenantConfig discord() {
+        // Ref https://discord.com/developers/docs/topics/oauth2
+        OidcTenantConfig ret = new OidcTenantConfig();
+        ret.setAuthServerUrl("https://discord.com/api/oauth2");
+        ret.setDiscoveryEnabled(false);
+        ret.setAuthorizationPath("authorize");
+        ret.setTokenPath("token");
+        ret.getAuthentication().setScopes(List.of("identify", "email"));
+        ret.getAuthentication().setIdTokenRequired(false);
+        ret.getToken().setVerifyAccessTokenWithUserInfo(true);
+        ret.setUserInfoPath("https://discord.com/api/users/@me");
+        return ret;
+    }
 }

extensions/oidc/runtime/src/test/java/io/quarkus/oidc/runtime/OidcUtilsTest.java

@@ -484,6 +484,41 @@ public void testOverrideTwitchProperties() throws Exception {
         assertEquals(Method.BASIC, config.credentials.clientSecret.method.get());
     }
 
+    @Test
+    public void testAcceptDiscordProperties() throws Exception {
+        OidcTenantConfig tenant = new OidcTenantConfig();
+        tenant.setTenantId(OidcUtils.DEFAULT_TENANT_ID);
+        OidcTenantConfig config = OidcUtils.mergeTenantConfig(tenant, KnownOidcProviders.provider(Provider.DISCORD));
+
+        assertEquals(OidcUtils.DEFAULT_TENANT_ID, config.getTenantId().get());
+        assertFalse(config.discoveryEnabled.get());
+        assertEquals("https://discord.com/api/oauth2", config.getAuthServerUrl().get());
+        assertEquals("authorize", config.getAuthorizationPath().get());
+        assertEquals("token", config.getTokenPath().get());
+        assertEquals("https://discord.com/api/users/@me", config.getUserInfoPath().get());
+        assertEquals(List.of("identify", "email"), config.authentication.scopes.get());
+        assertFalse(config.getAuthentication().idTokenRequired.get());
+    }
+
+    @Test
+    public void testOverrideDiscordProperties() throws Exception {
+        OidcTenantConfig tenant = new OidcTenantConfig();
+        tenant.setTenantId(OidcUtils.DEFAULT_TENANT_ID);
+
+        tenant.setApplicationType(ApplicationType.HYBRID);
+        tenant.setAuthServerUrl("http://localhost/wiremock");
+        tenant.credentials.clientSecret.setMethod(Method.BASIC);
+        tenant.authentication.setForceRedirectHttpsScheme(false);
+
+        OidcTenantConfig config = OidcUtils.mergeTenantConfig(tenant, KnownOidcProviders.provider(Provider.DISCORD));
+
+        assertEquals(OidcUtils.DEFAULT_TENANT_ID, config.getTenantId().get());
+        assertEquals(ApplicationType.HYBRID, config.getApplicationType().get());
+        assertEquals("http://localhost/wiremock", config.getAuthServerUrl().get());
+        assertFalse(config.getAuthentication().isForceRedirectHttpsScheme().get());
+        assertEquals(Method.BASIC, config.credentials.clientSecret.method.get());
+    }
+
     @Test
     public void testCorrectTokenType() throws Exception {
         OidcTenantConfig.Token tokenClaims = new OidcTenantConfig.Token();