src/manager/manager.c

   1 /**
   2  * @file manager.c
   3  *
   4  * @brief Implementation of manager_t.
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2007 Martin Willi
  10  * Hochschule fuer Technik Rapperswil
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  */
  22
  23 #include "manager.h"
  24
  25 #include "gateway.h"
  26
  27 #include <utils/linked_list.h>
  28
  29 typedef struct private_manager_t private_manager_t;
  30
  31 /**
  32  * private data of manager
  33  */
  34 struct private_manager_t {
  35
  36         /**
  37          * public functions
  38          */
  39         manager_t public;
  40
  41         /**
  42          * underlying database
  43          */
  44         database_t *db;
  45
  46         /**
  47          * user id, if we are logged in
  48          */
  49         int user;
  50
  51         /**
  52          * selected gateway
  53          */
  54         gateway_t *gateway;
  55 };
  56
  57 /**
  58  * Implementation of manager_t.create_gateway_enumerator.
  59  */
  60 static enumerator_t* create_gateway_enumerator(private_manager_t *this)
  61 {
  62         return this->db->create_gateway_enumerator(this->db, this->user);
  63 }
  64
  65 /**
  66  * Implementation of manager_t.select_gateway.
  67  */
  68 static gateway_t* select_gateway(private_manager_t *this, int select_id)
  69 {
  70         if (select_id != 0)
  71         {
  72                 enumerator_t *enumerator;
  73                 int id, port;
  74                 char *name, *address;
  75                 host_t *host;
  76
  77                 if (this->gateway) this->gateway->destroy(this->gateway);
  78                 this->gateway = NULL;
  79
  80                 enumerator = this->db->create_gateway_enumerator(this->db, this->user);
  81                 while (enumerator->enumerate(enumerator, &id, &name, &port, &address))
  82                 {
  83                         if (select_id == id)
  84                         {
  85                                 if (port != 0)
  86                                 {
  87                                         host = host_create_from_string(address, port);
  88                                         if (host)
  89                                         {
  90                                                 this->gateway = gateway_create(name, host);
  91                                         }
  92                                 }
  93                                 break;
  94                         }
  95                 }
  96                 enumerator->destroy(enumerator);
  97         }
  98         return this->gateway;
  99 }
 100
 101 /**
 102  * Implementation of manager_t.logged_in.
 103  */
 104 static bool logged_in(private_manager_t *this)
 105 {
 106         return this->user != 0;
 107 }
 108
 109 /**
 110  * Implementation of manager_t.login.
 111  */
 112 static bool login(private_manager_t *this, char *username, char *password)
 113 {
 114         if (!this->user)
 115         {
 116                 this->user = this->db->login(this->db, username, password);
 117         }
 118         return this->user != 0;
 119 }
 120
 121 /**
 122  * Implementation of manager_t.logout.
 123  */
 124 static void logout(private_manager_t *this)
 125 {
 126         if (this->gateway)
 127         {
 128                 this->gateway->destroy(this->gateway);
 129                 this->gateway = NULL;
 130         }
 131         this->user = 0;
 132 }
 133
 134 /**
 135  * Implementation of manager_t.destroy
 136  */
 137 static void destroy(private_manager_t *this)
 138 {
 139         if (this->gateway) this->gateway->destroy(this->gateway);
 140         free(this);
 141 }
 142
 143 /*
 144  * see header file
 145  */
 146 manager_t *manager_create(database_t *database)
 147 {
 148         private_manager_t *this = malloc_thing(private_manager_t);
 149
 150         this->public.login = (bool(*)(manager_t*, char *username, char *password))login;
 151         this->public.logged_in = (bool(*)(manager_t*))logged_in;
 152         this->public.logout = (void(*)(manager_t*))logout;
 153         this->public.create_gateway_enumerator = (enumerator_t*(*)(manager_t*))create_gateway_enumerator;
 154         this->public.select_gateway = (gateway_t*(*)(manager_t*, int id))select_gateway;
 155         this->public.context.destroy = (void(*)(context_t*))destroy;
 156
 157         this->user = 0;
 158         this->db = database;
 159         this->gateway = NULL;
 160
 161         return &this->public;
 162 }
 163