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Forum.php
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1 <?PHP
2 #
3 # FILE: Forum.php
4 #
5 # Part of the Collection Workflow Integration System (CWIS)
6 # Copyright 2002-2013 Edward Almasy and Internet Scout Research Group
7 # http://scout.wisc.edu/cwis/
8 #
9
14 class Forum extends Item
15 {
16
17 # ---- PUBLIC INTERFACE --------------------------------------------------
18
21
30 public static function Create($Name, $ModeratorId, $Description = NULL)
31 {
32 $DB = new Database();
33 $ModeratorId = intval($ModeratorId);
34
35 # name is required
36 $Name = trim($Name);
37 if (!strlen($Name))
38 {
39 throw new InvalidArgumentException("Specified ForumName is empty.");
40 }
41
42 # check if the ID provided is a valid user ID and has privilege
43 $Factory = new UserFactory();
44 if ($Factory->UserExists($ModeratorId))
45 {
46 $Moderator = new CWUser($ModeratorId);
47 if (!$Moderator->HasPriv(PRIV_FORUMADMIN))
48 {
49 throw new InvalidArgumentException("Specified moderator ID ("
50 .$ModeratorId.") is not a forum administrator.");
51 }
52 }
53 else
54 {
55 throw new InvalidArgumentException("Specified moderator ID ("
56 .$ModeratorId.") is not found.");
57 }
58
59 # set description if there is any
60 if (!is_null($Description))
61 {
62 $Query = "INSERT INTO Forums (ForumName, ModeratorId, ForumDescription)".
63 " VALUES ('".addslashes($Name)."', '".addslashes($ModeratorId)."', '"
64 .addslashes($Description)."')";
65 }
66 else
67 {
68 $Query = "INSERT INTO Forums (ForumName, ModeratorId) VALUES ('"
69 .addslashes($Name)."', '".addslashes($ModeratorId)."')";
70 }
71
72 # create a new record
73 $DB->Query($Query);
74
75 # get its forum id
76 $ForumId = $DB->LastInsertId();
77
78 return (new Forum($ForumId));
79 }
80
84 public function Delete()
85 {
86 $this->DB->Query("SELECT * FROM Topics WHERE ForumId = ".
87 $this->Id()." ORDER BY DateCreated DESC");
88
89 # get list of topics for this forum
90 while ($Entry = $this->DB->FetchRow())
91 {
92 $Topic = new Topic($Entry["TopicId"]);
93 $Topic->Delete();
94 }
95 # delete record from database
96 $this->Destroy();
97 }
102
108 public function ForumId()
109 {
110 return $this->Id();
111 }
112
118 public function LastMessageDate()
119 {
120 $Message = $this->GetLastMessage();
121 if (isset($Message))
122 {
123 return GetPrettyTimestamp($Message->DatePosted())." by ";
124 }
125 else
126 {
127 return "None";
128 }
129 }
130
135 public function LastMessagePoster()
136 {
137 $Message = $this->GetLastMessage();
138 if (isset($Message))
139 {
140 return $Message->PosterName();
141 }
142 }
143
148 public function LastMessagePosterEmail()
149 {
150 $Message = $this->GetLastMessage();
151 if (isset($Message))
152 {
153 return $Message->PosterEmail();
154 }
155 }
156
162 public function ModeratorName()
163 {
164 $UserId = (int)$this->ModeratorId();
165 $UserFactory = new CWUserFactory();
166
167 if ($UserFactory->UserExists($UserId))
168 {
169 return (new CWUser($UserId))->Get("UserName");
170 }
171 else
172 {
173 return NULL;
174 }
175 }
176
182 public function ModeratorEmail()
183 {
184 $UserId = (int)$this->ModeratorId();
185 $UserFactory = new CWUserFactory();
186
187 if ($UserFactory->UserExists($UserId))
188 {
189 return (new CWUser($UserId))->Get("EMail");
190 }
191 else
192 {
193 return NULL;
194 }
195 }
196
201 public function GetTopicList()
202 {
203 $Topics = array();
204
205 $this->DB->Query("SELECT * FROM Topics WHERE ForumId = '".
206 addslashes($this->Id())."' ORDER BY DateCreated DESC");
207
208 # get list of topics for this forum
209 while ($Entry = $this->DB->FetchRow())
210 {
211 $Topics[$Entry["TopicId"]] = new Topic($Entry["TopicId"]);
212 }
213 return $Topics;
214 }
215
221 public function GetLastMessage()
222 {
223 $Message = NULL;
224
225 $this->DB->Query("
226 SELECT M.* FROM Messages M
227 LEFT JOIN Topics T
228 ON M.ParentId = T.TopicId
229 WHERE M.ParentType = ".Message::PARENTTYPE_TOPIC."
230 AND T.ForumId = '".addslashes($this->Id())."'
231 ORDER BY DatePosted DESC
232 LIMIT 1");
233
234 if ($this->DB->NumRowsSelected())
235 {
236 $Row = $this->DB->FetchRow();
237 $Message = new Message($Row["MessageId"]);
238 }
239
240 return $Message;
241 }
242
248 public function ForumName($NewValue = DB_NOVALUE)
249 {
250 return $this->UpdateValue("ForumName", $NewValue);
251 }
252
258 public function ForumDescription($NewValue = DB_NOVALUE)
259 {
260 return $this->UpdateValue("ForumDescription", $NewValue);
261 }
262
268 public function TopicCount($NewValue = DB_NOVALUE)
269 {
270 return $this->UpdateValue("TopicCount", $NewValue);
271 }
272
278 public function MessageCount($NewValue = DB_NOVALUE)
279 {
280 return $this->UpdateValue("MessageCount", $NewValue);
281 }
282
289 public function ModeratorId($NewValue = DB_NOVALUE)
290 {
291 return $this->UpdateValue("ModeratorId", $NewValue);
292 }
293
304 public function AddTopic($Author, $TopicName, $Subject, $Body)
305 {
306 $Topic = Topic::Create();
307 $Topic->TopicName($TopicName);
308 $Topic->DateCreated(date("YmdHis"));
309 $Topic->ForumId($this->Id());
310 $Topic->CreatorId($Author->Id());
311
312 $this->TopicCount($this->TopicCount() + 1);
313
314 $this->PostMessage($Topic->TopicId(), $Author, $Subject, $Body);
315
316 return $Topic->TopicId();
317 }
318
326 public function PostMessage($TopicId, $Author, $Subject, $Body )
327 {
328 $Topic = new Topic($TopicId);
329
330 # create a new message
331 $Message = Message::Create();
332 $Message->ParentId($TopicId);
333 $Message->ParentType(Message::PARENTTYPE_TOPIC);
334 $Message->DatePosted(date("YmdHis"));
335 $Message->PosterId($Author->Id());
336 $Message->Subject($Subject);
337 $Message->Body($Body);
338
339 # update counts for topic and forum
340 $this->MessageCount($this->MessageCount() + 1 );
341
342 $Topic->MessageCount($Topic->MessageCount() + 1);
343
344 }
345
351 public static function DeleteMessage($MessageId)
352 {
353 $Message = new Message($MessageId);
354
355 $TopicId = $Message->ParentId();
356 $Topic = new Topic($TopicId);
357
358 $ForumId = $Topic->ForumId();
359 $Forum = new Forum($ForumId);
360
361 # update count for topic and forum and delete message
362 $Topic->MessageCount($Topic->MessageCount() - 1 );
363 $Forum->MessageCount($Forum->MessageCount() - 1 );
364
365 $Message->Delete();
366 }
367 }
Forum\AddTopic
AddTopic($Author, $TopicName, $Subject, $Body)
Add topic to forum.
Definition: Forum.php:304
Item\Id
Id()
Get item ID.
Definition: Item.php:81
Message
Abstraction for forum messages and resource comments.
Definition: Message.php:14
Forum\MessageCount
MessageCount($NewValue=DB_NOVALUE)
Get or set the forum&#39;s message count.
Definition: Forum.php:278
Item\UpdateValue
UpdateValue($ColumnName, $NewValue=DB_NOVALUE)
Convenience function to supply parameters to Database::UpdateValue().
Definition: Item.php:284
Forum
A converastion forum which includes topics and messages.
Definition: Forum.php:14
Message\Create
static Create()
Create an empty message object.
Definition: Message.php:28
Database
SQL database abstraction object with smart query caching.
Definition: Database.php:22
Message\PARENTTYPE_TOPIC
const PARENTTYPE_TOPIC
Definition: Message.php:16
Forum\LastMessageDate
LastMessageDate()
Get the date of the most recent post to the forum.
Definition: Forum.php:118
Item\$DB
$DB
Definition: Item.php:210
Forum\ModeratorEmail
ModeratorEmail()
Get the e-mail address of the forum&#39;s moderator.
Definition: Forum.php:182
Forum\ForumDescription
ForumDescription($NewValue=DB_NOVALUE)
Get or modify the forum description.
Definition: Forum.php:258
Topic
Abstraction for topics within a Forum.
Definition: Topic.php:14
Forum\TopicCount
TopicCount($NewValue=DB_NOVALUE)
Get or set the forum&#39;s topic count.
Definition: Forum.php:268
Item\Destroy
Destroy()
Destroy item.
Definition: Item.php:60
Forum\LastMessagePosterEmail
LastMessagePosterEmail()
Get the e-mail address of the user with the most recent post.
Definition: Forum.php:148
Forum\GetLastMessage
GetLastMessage()
Get the last message posted in the forum.
Definition: Forum.php:221
CWUserFactory
CWIS-specific user factory class.
Definition: CWUserFactory.php:13
Topic\Create
static Create()
Create an empty new topic.
Definition: Topic.php:25
PHP
PHP
Definition: RSSClient--Test.php:12
Item
Common base class for persistent items store in database.
Definition: Item.php:13
DB_NOVALUE
const DB_NOVALUE
Definition: Database.php:1738
Forum\Create
static Create($Name, $ModeratorId, $Description=NULL)
Create a forum.
Definition: Forum.php:30
UserFactory
Definition: UserFactory.php:18
Forum\PostMessage
PostMessage($TopicId, $Author, $Subject, $Body)
Post new message to topic.
Definition: Forum.php:326
Forum\DeleteMessage
static DeleteMessage($MessageId)
Delete a message from a forum, updating the message counts for the associated forum and topic...
Definition: Forum.php:351
Forum\ForumId
ForumId()
Get the forum&#39;s ID.
Definition: Forum.php:108
Forum\ModeratorId
ModeratorId($NewValue=DB_NOVALUE)
Get or set the forum&#39;s moderator.
Definition: Forum.php:289
Forum\Delete
Delete()
Remove this forum, deleting all assocated topics and messages.
Definition: Forum.php:84
Forum\GetTopicList
GetTopicList()
Get the list of the topics in this forum.
Definition: Forum.php:201
Forum\ForumName
ForumName($NewValue=DB_NOVALUE)
Get or modify the forum&#39;s name.
Definition: Forum.php:248
Forum\ModeratorName
ModeratorName()
Get the CWIS username of the forum&#39;s moderator.
Definition: Forum.php:162
Forum\LastMessagePoster
LastMessagePoster()
Get the CWIS username of the user with the most recent post.
Definition: Forum.php:135
CWUser
CWIS-specific user class.
Definition: CWUser.php:13