/*
 * Copyright 2000-2010 JetBrains s.r.o.
 *
 * 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.intellij.ide.passwordSafe;

import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ModalityState;
import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * The interface defines basic password management operations
 */
public interface PasswordStorage {
  /**
   * <p>Get password stored in a password safe.</p>
   *
   * <p><b>NB: </b>
   *    This method may be called from the background,
   *    and it may need to ask user to enter the master password to access the database by calling
   *    {@link Application#invokeAndWait(Runnable, ModalityState) invokeAndWait()} to show a modal dialog.
   *    So make sure not to call it from the read action.
   *    Calling this method from the dispatch thread is allowed.</p>
   *
   * @param project   the project, that is used to ask for the master password if this is the first access to password safe
   * @param requestor the requestor class
   * @param key       the key for the password
   * @return the stored password or null if the password record was not found or was removed
   * @throws PasswordSafeException if password safe cannot be accessed
   * @throws IllegalStateException if the method is called from the read action.
   */
  @Nullable
  String getPassword(@Nullable Project project, @NotNull Class requestor, String key) throws PasswordSafeException;
  /**
   * Remove password stored in a password safe
   *
   * @param project   the project, that is used to ask for the master password if this is the first access to password safe
   * @param requestor the requestor class
   * @param key       the key for the password
   * @return the plugin key
   * @throws PasswordSafeException if password safe cannot be accessed
   */
  void removePassword(@Nullable Project project, @NotNull Class requestor, String key) throws PasswordSafeException;
  /**
   * Store password in password safe
   *
   * @param project   the project, that is used to ask for the master password if this is the first access to password safe
   * @param requestor the requestor class
   * @param key       the key for the password
   * @param value     the value to store
   * @throws PasswordSafeException if password safe cannot be accessed
   */
  void storePassword(@Nullable Project project, @NotNull Class requestor, String key, String value) throws PasswordSafeException;
}