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// Copyright (C) 2009 The Android Open Source Project
// Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
//
// 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.data.GerritConfig;
import com.google.gerrit.common.data.GitwebConfig;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.server.account.Realm;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.config.AnonymousCowardName;
import com.google.gerrit.server.config.AuthConfig;
import com.google.gerrit.server.config.DownloadConfig;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.contact.ContactStore;
import com.google.gerrit.server.mail.EmailSender;
import com.google.gerrit.server.ssh.SshInfo;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;

import org.eclipse.jgit.lib.Config;

import java.net.MalformedURLException;
import java.util.HashSet;
import java.util.Set;

import javax.servlet.ServletContext;

class GerritConfigProvider implements Provider<GerritConfig> {
  private final Realm realm;
  private final Config cfg;
  private final AuthConfig authConfig;
  private final DownloadConfig downloadConfig;
  private final GitWebConfig gitWebConfig;
  private final AllProjectsName wildProject;
  private final SshInfo sshInfo;

  private EmailSender emailSender;
  private final ContactStore contactStore;
  private final ServletContext servletContext;
  private final String anonymousCowardName;

  @Inject
  GerritConfigProvider(final Realm r, @GerritServerConfig final Config gsc,
      final AuthConfig ac, final GitWebConfig gwc, final AllProjectsName wp,
      final SshInfo si, final ContactStore cs,
      final ServletContext sc, final DownloadConfig dc,
      final @AnonymousCowardName String acn) {
    realm = r;
    cfg = gsc;
    authConfig = ac;
    downloadConfig = dc;
    gitWebConfig = gwc;
    sshInfo = si;
    wildProject = wp;
    contactStore = cs;
    servletContext = sc;
    anonymousCowardName = acn;
  }

  @Inject(optional = true)
  void setEmailSender(final EmailSender d) {
    emailSender = d;
  }

  private GerritConfig create() throws MalformedURLException {
    final GerritConfig config = new GerritConfig();
    switch (authConfig.getAuthType()) {
      case LDAP:
      case LDAP_BIND:
        config.setRegisterUrl(cfg.getString("auth", null, "registerurl"));
        config.setRegisterText(cfg.getString("auth", null, "registertext"));
        config.setEditFullNameUrl(cfg.getString("auth", null, "editFullNameUrl"));
        break;

      case CUSTOM_EXTENSION:
        config.setRegisterUrl(cfg.getString("auth", null, "registerurl"));
        config.setRegisterText(cfg.getString("auth", null, "registertext"));
        config.setEditFullNameUrl(cfg.getString("auth", null, "editFullNameUrl"));
        config.setHttpPasswordUrl(cfg.getString("auth", null, "httpPasswordUrl"));
        break;

      case CLIENT_SSL_CERT_LDAP:
      case DEVELOPMENT_BECOME_ANY_ACCOUNT:
      case HTTP:
      case HTTP_LDAP:
      case OPENID:
      case OPENID_SSO:
        break;
    }
    config.setUseContributorAgreements(cfg.getBoolean("auth",
        "contributoragreements", false));
    config.setGitDaemonUrl(cfg.getString("gerrit", null, "canonicalgiturl"));
    config.setGitHttpUrl(cfg.getString("gerrit", null, "gitHttpUrl"));
    config.setUseOnePageReview(cfg.getBoolean("gerrit", "onepagereview", false));
    config.setUseContactInfo(contactStore != null && contactStore.isEnabled());
    config.setDownloadSchemes(downloadConfig.getDownloadSchemes());
    config.setDownloadCommands(downloadConfig.getDownloadCommands());
    config.setAuthType(authConfig.getAuthType());
    config.setWildProject(wildProject);
    config.setDocumentationAvailable(servletContext
        .getResource("/Documentation/index.html") != null);
    config.setTestChangeMerge(cfg.getBoolean("changeMerge",
        "test", false));
    config.setAnonymousCowardName(anonymousCowardName);
    config.setSuggestFrom(cfg.getInt("suggest", "from", 0));

    config.setReportBugUrl(cfg.getString("gerrit", null, "reportBugUrl"));
    if (config.getReportBugUrl() == null) {
      config.setReportBugUrl("http://code.google.com/p/gerrit/issues/list");
    } else if (config.getReportBugUrl().isEmpty()) {
      config.setReportBugUrl(null);
    }

    final Set<Account.FieldName> fields = new HashSet<Account.FieldName>();
    for (final Account.FieldName n : Account.FieldName.values()) {
      if (realm.allowsEdit(n)) {
        fields.add(n);
      }
    }
    if (emailSender != null && emailSender.isEnabled()) {
      fields.add(Account.FieldName.REGISTER_NEW_EMAIL);
    }
    config.setEditableAccountFields(fields);

    if (gitWebConfig.getUrl() != null) {
      config.setGitwebLink(new GitwebConfig(gitWebConfig.getUrl(), gitWebConfig
          .getGitWebType()));
    }

    if (sshInfo != null && !sshInfo.getHostKeys().isEmpty()) {
      config.setSshdAddress(sshInfo.getHostKeys().get(0).getHost());
    }

    return config;
  }

  @Override
  public GerritConfig get() {
    try {
      return create();
    } catch (MalformedURLException e) {
      throw new ProvisionException("Cannot create GerritConfig instance", e);
    }
  }
}