1 files changed, 63 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/mail/ListMailFilter.java b/java/com/google/gerrit/server/mail/ListMailFilter.java
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+++ b/java/com/google/gerrit/server/mail/ListMailFilter.java
@@ -0,0 +1,63 @@
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.server.mail;
+
+import static java.util.stream.Collectors.joining;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.mail.MailMessage;
+import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+import java.util.Arrays;
+import java.util.regex.Pattern;
+import org.eclipse.jgit.lib.Config;
+
+@Singleton
+public class ListMailFilter implements MailFilter {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  public enum ListFilterMode {
+    OFF,
+    WHITELIST,
+    BLACKLIST
+  }
+
+  private final ListFilterMode mode;
+  private final Pattern mailPattern;
+
+  @Inject
+  ListMailFilter(@GerritServerConfig Config cfg) {
+    this.mode = cfg.getEnum("receiveemail", "filter", "mode", ListFilterMode.OFF);
+    String[] addresses = cfg.getStringList("receiveemail", "filter", "patterns");
+    String concat = Arrays.asList(addresses).stream().collect(joining("|"));
+    this.mailPattern = Pattern.compile(concat);
+  }
+
+  @Override
+  public boolean shouldProcessMessage(MailMessage message) {
+    if (mode == ListFilterMode.OFF) {
+      return true;
+    }
+
+    boolean match = mailPattern.matcher(message.from().getEmail()).find();
+    if ((mode == ListFilterMode.WHITELIST && !match)
+        || (mode == ListFilterMode.BLACKLIST && match)) {
+      logger.atInfo().log("Mail message from %s rejected by list filter", message.from());
+      return false;
+    }
+    return true;
+  }
+}