1 /*
2  * sys-emu - A system emulator for tutorials
3  * Copyright (C) 2018 - 2019 osdevelopment-info
4  *
5  * This program is free software: you can redistribute it and/or modify
6  * it under the terms of the GNU Affero General Public License as published by
7  * the Free Software Foundation, either version 3 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU Affero General Public License for more details.
14  *
15  * You should have received a copy of the GNU Affero General Public License
16  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
17  */
18 package info.osdevelopment.sysemu.system
19 
20 import info.osdevelopment.sysemu.model.SystemModel
21 import java.util.UUID
22 import java.util.logging.Logger
23 import scala.collection.mutable
24 
25 /**
26   * A repository with all known systems.
27   */
28 object SystemRepository {
29 
30   def apply() = new SystemRepository
31 
32 }
33 
34 class SystemRepository {
35 
36   private val log = Logger.getLogger(classOf[SystemRepository].getName)
37 
38   /** All known systems. */
39   private val systemMap = mutable.Map[UUID, System]()
40 
41   def create(): Option[SystemModel] = {
42     val system = System()
43     systemMap += (system.uuid -> system)
44     log.info("Created system " + system.uuid)
45     Some(SystemModel(system.uuid))
46   }
47 
48   /**
49     * Remove the system with the given UUID from the list of systems. Returns true if the system was removed, false if
50     * no system with the given UUID was found.
51     * @param uuid the UUID of the system to delete
52     * @return true, if the system existed and was removed
53     */
54   def remove(uuid: UUID): Option[SystemModel] = {
55     log.info("Removing system " + uuid)
56     systemMap remove(uuid) match {
57       case Some(system) => Some(SystemModel(system.uuid))
58       case _ => None
59     }
60   }
61 
62   /**
63     * Returns the system with the given UUID.
64     * @param uuid the UUID of the system to return
65     * @return Some(System) if a system with the given UUID exists or None
66     */
67   def byUUID(uuid: UUID): Option[SystemModel] = {
68     log.fine("Getting system " + uuid)
69     systemMap.get(uuid) match {
70       case Some(system) => Some(SystemModel(system.uuid))
71       case _ => None
72     }
73   }
74 
75   /**
76     * Returns an Iterable with all known systems.
77     * @return all known systems
78     */
79   def all(): Iterable[SystemModel] = {
80     log.fine("Getting all systems")
81     systemMap.values.map(s => SystemModel(s.uuid))
82   }
83 
84 }