QQ chat Analysis notes

The chat room program we will create is structured according to the client/server model. The customer will randomly connect to the chat room. If a chat room receives a customer, the customer will send a message to the chat room. Then each message is broadcast in the chat room. In addition to the sender, each customer who establishes a connection with the chat room will receive a copy. note: The number of people in the chat room is online. When the number of people reaches online, users cannot connect.

Requirement Analysis:
Participants: selanger, Administrator
Use case diagram
Color wolf ---------------- log on to the chat room
| --------------------- Send greetings to mm
-------------------- System forwarding MM's dislike of the color wolf.
| ---------------------- Exit the chat room

Administrator ---------------- adds a chat room
| ----------------------- Delete a chat room
| ---------------------- Modify chat room information

Use Case Specification
Use Case 1: log on to the chat room
1. The client obtains the address of the chat room.
2. The system places the address of a chat room.
3. The customer connects to the chat room
4. The system returns the successful logon information.
5. End of use case
Prerequisites: you must first know the address of the chatting room server.
Post condition: Add a user to a chat room
Backup event stream 1
4. When the number of connected chat rooms reaches the upper limit, the system returns a message indicating that the chat room is full.
Alternate event stream 2
4. When a user has logged on to a chat room and the user has logged on to the chat room again, the system returns the login message and

Use Case 2 color wolf sends greetings to mm
1. The client sends messages to the chat room
2. The system returns confirmation information.
Prerequisites: you must first log on to and change the chat room.
Post condition: a message to be sent to the chat room is added.

Case 3 system forwarding MM's contempt for the color Wolf
1. The system sends a message of another customer to the client.
2. The client submits an application for confirmation to the chat room.
Prerequisites: you must first log on to the chat room.
Post condition: the chat room does not send this message to selanger.

Case 4 Add a chat room as an administrator
1. Enter the name and number of new chat rooms
2. The system returns a successful message.
Prerequisites: the Administrator must first log on to the system.
Post condition: the system adds a chat room

Case 5: The Administrator deletes a chat room
1. Enter the number of the chat room to be deleted.
2. The system returns a successful message.
Prerequisites: the Administrator must first log on to the system.
Post condition: reduce a chat room in the system
Remarks event stream 1
2. When there are users in the chat room ??????? (How can I solve this problem ?)

Use Case 6: log out of the chat room
1. Submit an exit request to the chat room
2. The system returns confirmation information.
Prerequisites: Used to log on to the chat room.
Post condition: the chat room will reduce one user

Case 7 modify chat room information
1. Enter the modified chat room information, including the name of the chat room and the number of people going online.
2. The system returns a successful message.
Prerequisites: The administrator must log on to the system.
Post condition: the chat room information is modified ???)

Rough Class Analysis:
Tcharroomserver tcharroom tclient
Count maxcount clientname
Charroom []: tcharroom clientcount charroomname
Address clients []: tclient recvmsgs: tmessage
Msgcount recvmsgcount
Msgs []: tmessage sendmsg (MSG: string)
Tmessage
Clientname;
MSG

Rough Class Analysis:
Tcharroomserver tcharroom tclient
Count maxcount clientname
Charroom []: tcharroom clientcount charroomname
Address clients []: tclient recvmsgs: tmessage
Msgcount recvmsgcount
Msgs []: tmessage sendmsg (MSG: string)
Tmessage
Clientname;
MSG

Implementation
1 ttestchar = Class (ttestcase)
Private
SRV: tcharroomserver;
Charroom: tcharroom;
Cliarr: array [0 .. maxclient] of tclient;
Protected
Procedure setup (); override;
Procedure teardown (); override;
Published
Procedure testoneclient ();
Procedure testmaxconnect ();
End;
.//...
Procedure ttestchar. Setup ();
VaR
I: integer;
Begin
SRV: = tserver. Create;
Charroom: = tcharroom. Create (SRV );
Charroom. charname: = 'yihongyuan ';
For I: = 0 to MaxClient-1 do
Cliarr [I]: = tclient. Create;
End;

Procedure ttestchar. teardown ();
VaR
I: integer;
Begin
For I: = 0 to MaxClient-1 do
If assigned (cliarr [I]) then
Freeandnil (cliarr [I]);
SRV. Free;
End;

Procedure ttestchar. testoncclient ()
Begin
Check (SRV. charroom [0]. charname = 'yihongyuan ');
Check (cliarr [0]. Connect ('srv') = true );
Check (cliarr [0]. charroomname = 'yihongyuan ');
Check (SRV. charroom [0]. Client [0]. clientname = 'wollong ');
End;

Procedure ttestchar. testmaxconnect ();
VaR
CLI: tclient;
Begin
Check (charroom. maxclient
For I: = 0 to MaxCount-1 do
Cliarr [I]. Connect ('srv ');
Check (charroom. Count = charroom. maxcount );
CLI: = tclient. Create;
Check (CLI. Connect ('srv') = false );
CLI. Free;
End;
To be continued ....