Allow to enable/disable LDAP provider in config

src/main/groovy/io/kamax/mxisd/config/LdapConfig.groovy

@@ -32,6 +32,7 @@ class LdapConfig implements InitializingBean {
 
     private Logger log = LoggerFactory.getLogger(LdapConfig.class)
 
+    private boolean enabled;
     private String host
     private int port
     private String baseDn
@@ -41,6 +42,14 @@ class LdapConfig implements InitializingBean {
     private String bindPassword
     private Map<String, String> mappings
 
+    boolean getEnabled() {
+        return enabled
+    }
+
+    void setEnabled(boolean enabled) {
+        this.enabled = enabled
+    }
+
     String getHost() {
         return host
     }

src/main/groovy/io/kamax/mxisd/lookup/provider/DnsLookupProvider.groovy

@@ -48,6 +48,11 @@ class DnsLookupProvider implements IThreePidProvider {
     @Autowired
     private IRemoteIdentityServerFetcher fetcher
 
+    @Override
+    boolean isEnabled() {
+        return true
+    }
+
     @Override
     boolean isLocal() {
         return false

src/main/groovy/io/kamax/mxisd/lookup/provider/ForwarderProvider.groovy

@@ -40,6 +40,11 @@ class ForwarderProvider implements IThreePidProvider {
     @Autowired
     private IRemoteIdentityServerFetcher fetcher
 
+    @Override
+    boolean isEnabled() {
+        return true
+    }
+
     @Override
     boolean isLocal() {
         return false

src/main/groovy/io/kamax/mxisd/lookup/provider/IThreePidProvider.groovy

@@ -25,6 +25,8 @@ import io.kamax.mxisd.lookup.ThreePidMapping
 
 interface IThreePidProvider {
 
+    boolean isEnabled()
+
     boolean isLocal()
 
     /**

src/main/groovy/io/kamax/mxisd/lookup/provider/LdapProvider.groovy

@@ -50,6 +50,11 @@ class LdapProvider implements IThreePidProvider {
     @Autowired
     private LdapConfig ldapCfg
 
+    @Override
+    boolean isEnabled() {
+        return ldapCfg.getEnabled()
+    }
+
     @Override
     boolean isLocal() {
         return true

src/main/groovy/io/kamax/mxisd/lookup/strategy/RecursivePriorityLookupStrategy.groovy

@@ -96,7 +96,7 @@ class RecursivePriorityLookupStrategy implements LookupStrategy, InitializingBea
 
         log.info("Host {} allowed for recursion: {}", request.getRequester(), canRecurse)
         for (IThreePidProvider provider : providers) {
-            if (provider.isLocal() || canRecurse) {
+            if (provider.isEnabled() && (provider.isLocal() || canRecurse)) {
                 usableProviders.add(provider)
             }
         }