From 70a614a0d43b3a8a614e751df442aac1900aedba Mon Sep 17 00:00:00 2001
From: ulrich <ulrich@uhilger.de>
Date: Fri, 10 Feb 2017 06:55:52 +0000
Subject: [PATCH] SessionManager hinzugefuegt, abstrakte Api-Klasse hinzugefuegt

---
 src/java/de/uhilger/um/api/UserMgr.java |  208 +++++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 188 insertions(+), 20 deletions(-)

diff --git a/src/java/de/uhilger/um/api/UserMgr.java b/src/java/de/uhilger/um/api/UserMgr.java
index dea28ca..3f06be7 100644
--- a/src/java/de/uhilger/um/api/UserMgr.java
+++ b/src/java/de/uhilger/um/api/UserMgr.java
@@ -1,54 +1,222 @@
+/*
+ *  Nutzerverwaltung - User and role management in your browser
+ *  Copyright (C) 2011-2016 Ulrich Hilger, http://uhilger.de
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see http://www.gnu.org/licenses/
+ */
+
 package de.uhilger.um.api;
 
 import de.uhilger.baselink.GenericRecord;
+import de.uhilger.baselink.PersistenceManager;
 import de.uhilger.baselink.Record;
-import de.uhilger.um.App;
+import de.uhilger.transit.web.RequestKontext;
+import de.uhilger.transit.web.WebKontext;
+import de.uhilger.um.Digester;
 import de.uhilger.um.daten.User;
+import de.uhilger.um.daten.UserData;
+import de.uhilger.um.daten.UserRole;
+import java.sql.Connection;
 import java.util.List;
-import org.apache.catalina.realm.RealmBase;
+import java.util.Properties;
+import java.util.logging.Logger;
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
 
 /**
+ * <p>Die Methoden der Klasse UserMgr sind  
+ * die 'Fassade', die &uuml;ber Transit als Programmschnittstelle 
+ * (Application Programming Interface, API) 
+ * nach au&szlig;en bereitgestellt wird. UserMgr dient weitgehend 
+ * als 'Durchreiche' f&uuml;r die Funktionalit&auml;t anderer Klassen.</p>
+ * 
+ * <p>
+ * Der UserMgr erh&auml;lt die ben&ouml;tigten Methoden aus dem ServletContext. 
+ * Auf diese Weise sind keine statischen Abh&auml;ngigkeiten in den Code 
+ * gewandert. Die folgenden Elemente werden vom UserMgr im ServletContext 
+ * erwartet:
+ * <ul>
+ * <li>PersistenceManager</li>
+ * <li>SQL-Properties</li>
+ * <li>Digester</li>
+ * </p> 
+ * 
+ * @author Copyright (c) Ulrich Hilger, http://uhilger.de
+ * @author Published under the terms and conditions of the
+ * <a href="http://www.gnu.org/licenses/agpl-3.0" target="_blank">GNU Affero
+ * General Public License</a>
  *
- * @author Ulrich Hilger
+ * @version 2, December 27, 2016
  */
-public class UserMgr {
+public class UserMgr extends Api /*implements WebKontext, RequestKontext*/ {
   
-  private static final String MD5 = "MD5";
+  private static final Logger logger = Logger.getLogger(UserMgr.class.getName());
   
-  private static final Record UserMapper = new GenericRecord(User.class);
+  /** Zeiger zum Servlet-Kontext dieser Anwendung */
+  //private ServletContext ctx;
   
+  //private HttpServletRequest request;
+  
+  /** Name, unter dem das Properties-Objekt mit den SQL-Befehlen im ServletContext hinterlegt ist */
+  public static final String UM_SQL_PROPERTIES = "umSqlProperties";
+
+  /** Name, unter dem das Digester-Objekt im ServletContext hinterlegt ist */
+  public static final String P_DIGESTER = "digester";
+
+  /** Name, unter dem das Zugriffsobjekt zur Datenbank im ServletContext hinterlegt ist */
+  public static final String UM_DB = "umDb";
+  
+  /** Boolean-Konstante zur Kennzeichnung von Datenbankergebnissen ohne Blobs */
+  public static final boolean WITHOUT_BLOBS = false;
+
+  /** Referenz zum SQL-Befehl zur Ermittlung der Benutzer */
   public static final String SQL_GET_USER_LIST = "getUserList";
+  /** Referenz zum SQL-Befehl zur Ermittlung der Benutzer-Namen */
   public static final String SQL_GET_USER_NAME_LIST = "getUserNameList";
-  public static final String SQL_DELETE_USER = "deleteUser";
+  /** Referenz zum SQL-Befehl zur Ermittlung der Rollen */
+  public static final String SQL_GET_ROLE_LIST = "getRoleList";
+  /** Referenz zum SQL-Befehl zur Ermittlung der Rollen eines Benutzers */
+  public static final String SQL_GET_USER_ROLES = "getUserRoles";
+  /** Referenz zum SQL-Befehl zum Loeschen aller Rollen eines Nutzers */
+  public static final String SQL_DELETE_USER_ROLES = "deleteUserRoles";
+  public static final String SQL_GET_USER_DATA = "getUserData";
   
-  public User createUser(User user) {
+  public static final String MP_USER = "userMapper";
+  public static final String MP_USER_DATA = "userDataMapper";
+  public static final String MP_USER_ROLE = "userRoleMapper";
+  
+  /** Mapper-Objekt fuer Benutzer */
+  //private static final Record UserMapper = new GenericRecord(User.class);
+  /** Mapper-Objekt fuer Benutzerdaten */
+  //private static final Record UserDataMapper = new GenericRecord(UserData.class);
+  /** Mapper-Objekt fuer Benutzerrollen */
+  //private static final Record UserRoleMapper = new GenericRecord(UserRole.class);
+  
+  /* ----------- Benutzer -------------- */
+  
+  public User createUser(User user) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
     String kw = user.getPw();
-    String digestedPw = RealmBase.Digest(kw, MD5, null);
+    String digesterClassName = getServletContext().getInitParameter(P_DIGESTER);
+    Digester digester = (Digester) Class.forName(digesterClassName).newInstance();
+    /*
+      MD5 geht nicht mehr,
+      vgl. http://stackoverflow.com/questions/39967289/how-to-use-digest-authentication-in-tomcat-8-5
+    */
+    String digestedPw = digester.digest(kw, Digester.SHA256, null);
     user.setPw(digestedPw);
-    App.getDatabase().insert(user, UserMapper);
+    getDb().insert(user, getMapper(MP_USER));
     return user;
   }
   
   public List getUserNameList() {
-    String sql = App.getSqlStatement(SQL_GET_USER_NAME_LIST);
-    List userNames = App.getDatabase().select(sql, App.WITHOUT_BLOBS);
-    return userNames;
+    return removeHeadline(getDb().select(getSql(SQL_GET_USER_NAME_LIST), WITHOUT_BLOBS));
   }
   
   public User deleteUser(User user) {
-    return (User) App.getDatabase().delete(user, UserMapper);
+    PersistenceManager pm = getDb();
+    Connection c = pm.getConnection();
+    pm.startTransaction(c);
+    pm.execute(c, getSql(SQL_DELETE_USER_ROLES), user.getId());
+    User deletedUser = (User) pm.delete(c, user, getMapper(MP_USER));
+    pm.commit(c);
+    return deletedUser;
+  }
+     
+  public String logout() {
+    getRequest().getSession().invalidate();
+		return "logged out";
   }
   
+  /* ------------ Rollen ------------------ */
+  
+  public UserRole grantRole(UserRole role) {
+    getDb().insert(role, getMapper(MP_USER_ROLE));
+    return role;
+  }
+  
+  public UserRole revokeRole(UserRole role) {
+    getDb().delete(role, getMapper(MP_USER_ROLE));
+    return role;
+  }
+  
+  public List getRoleNamesGranted() {
+    return removeHeadline(getDb().select(getSql(SQL_GET_ROLE_LIST), WITHOUT_BLOBS));
+  }
+  
+  public List getUserRoleNames(String userId) {
+    return removeHeadline(getDb().select(getSql(SQL_GET_USER_ROLES), WITHOUT_BLOBS, userId));
+  }
+  
+  /* ----------- Helfer ---- */
+  
+  private List removeHeadline(List list) {
+    if(list != null && list.size() > 0) {
+      list.remove(0);
+    }
+    return list;
+  }
+  
+  /**
+   * Ein benanntes SQL-Kommando ermitteln 
+   * @param id Name des gewuenschten SQL-Kommandos
+   * @return das SQL-Kommando mit der in id angegebenen Bezeichnung 
+   */
   /*
-  public List getUserList() {
-    String sql = App.getSqlStatement(SQL_GET_USER_LIST);
-    List users = App.getDatabase().select(sql, UserMapper, App.WITHOUT_BLOBS);
-    return users;
+  private String getSql(String id) {
+    Properties sql = (Properties) ctx.getAttribute(UserMgr.UM_SQL_PROPERTIES);
+    return sql.getProperty(id);
+  }
+  
+  private PersistenceManager getDb() {
+    return (PersistenceManager) ctx.getAttribute(UM_DB);
+  }
+  
+  private Record getMapper(String mapperName) {
+    Record record = null;
+    Object o = getServletContext().getAttribute(mapperName);
+    if(o instanceof Record) {
+      record = (Record) o;
+    }
+    return record;
+  }
+  */
+  /* ------------- Implementierung WebKontext ------------- */
+
+  /*
+  @Override
+  public ServletContext getServletContext() {
+    return ctx;
+  }
+
+  @Override
+  public void setServletContext(ServletContext servletContext) {
+    this.ctx = servletContext;
   }
   */
   
-  public String hallo() {
-    return "Hallo Welt";
+  /* ------------- Implementierung RequestKontext ------------- */
+
+  /*
+  @Override
+  public HttpServletRequest getRequest() {
+    return request;
   }
+
+  @Override
+  public void setRequest(HttpServletRequest r) {
+    this.request = r;
+  }
+  */
   
 }

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