// Copyright (C) 2012 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.httpd;

import com.google.gerrit.common.Nullable;
import com.google.gerrit.server.RemotePeer;
import com.google.gerrit.server.config.CanonicalWebUrl;
import com.google.gerrit.server.util.RequestScopePropagator;
import com.google.gerrit.server.util.ThreadLocalRequestContext;
import com.google.inject.Inject;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.servlet.ServletScopes;
import com.google.inject.util.Providers;
import com.google.inject.util.Types;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.net.SocketAddress;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Callable;

/** Propagator for Guice's built-in servlet scope. */
public class GuiceRequestScopePropagator extends RequestScopePropagator {

  private final String url;
  private final SocketAddress peer;

  @Inject
  GuiceRequestScopePropagator(
      @CanonicalWebUrl @Nullable Provider<String> urlProvider,
      @RemotePeer Provider<SocketAddress> remotePeerProvider,
      ThreadLocalRequestContext local) {
    super(ServletScopes.REQUEST, local);
    this.url = urlProvider != null ? urlProvider.get() : null;
    this.peer = remotePeerProvider.get();
  }

  /** @see RequestScopePropagator#wrap(Callable) */
  // ServletScopes#continueRequest is deprecated, but it's not obvious their
  // recommended replacement is an appropriate drop-in solution; see
  // https://gerrit-review.googlesource.com/83971
  @SuppressWarnings("deprecation")
  @Override
  protected <T> Callable<T> wrapImpl(Callable<T> callable) {
    Map<Key<?>, Object> seedMap = new HashMap<>();

    // Request scopes appear to use specific keys in their map, instead of only
    // providers. Add bindings for both the key to the instance directly and the
    // provider to the instance to be safe.
    seedMap.put(Key.get(typeOfProvider(String.class), CanonicalWebUrl.class), Providers.of(url));
    seedMap.put(Key.get(String.class, CanonicalWebUrl.class), url);

    seedMap.put(Key.get(typeOfProvider(SocketAddress.class), RemotePeer.class), Providers.of(peer));
    seedMap.put(Key.get(SocketAddress.class, RemotePeer.class), peer);

    return ServletScopes.continueRequest(callable, seedMap);
  }

  private ParameterizedType typeOfProvider(Type type) {
    return Types.newParameterizedType(Provider.class, type);
  }
}

@@ -1318,16 +1318,62 @@
 allable;
+%0Aimport javax.servlet.http.HttpServletRequest;
 %0A%0A/** Pr
@@ -1558,16 +1558,70 @@
 ss peer;
+%0A  private final Provider%3CHttpServletRequest%3E request;
 %0A%0A  @Inj
@@ -1817,16 +1817,60 @@
 xt local
+,%0A      Provider%3CHttpServletRequest%3E request
 ) %7B%0A    
@@ -2011,16 +2011,44 @@
 .get();%0A
+    this.request = request;%0A
   %7D%0A%0A  /
@@ -2921,24 +2921,24 @@
 .of(peer));%0A
-
     seedMap.
@@ -2993,24 +2993,326 @@
 s), peer);%0A%0A
+    Key%3C?%3E webSessionAttrKey = Key.get(WebSession.class);%0A    Object webSessionAttrValue = request.get().getAttribute(webSessionAttrKey.toString());%0A    seedMap.put(webSessionAttrKey, webSessionAttrValue);%0A    seedMap.put(Key.get(typeOfProvider(WebSession.class)), Providers.of(webSessionAttrValue));%0A%0A
     return S

Fix "internal error" when pushing to refs/users/*, propagate WebSession