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Gachon Univ. 21, Database Term Project - Instagram Clone

Basic information

• description: Gachon Univ. 21, Database Term Project - Instagram Clone
• author: 김예지, 김의진, 서지호, 조태완
• version: 1.0.0
• university: Gachon University
• department: Artificial Intelligence
• email: taewan2002@gachon.ac.kr, ksdk6145@gachon.ac.kr, whitekuj02@gachon.ac.kr, yezii1120@gachon.ac.kr
• last update: 2022-11-28

Database tables

chat_manager

• chat_id: char(70)
• member: int

chat_table

• chat_room_id: char(70)
• chat_file: char(70)

comment

• comment_id: int, primary key
• content: varchar(2000)
• perrent_id: int
• user_id: int unsigned
• post_id: int unsigned

follow

• follow_id: int, primary key
• follower_id: int
• following: int

hashtag

• hashtag_id: int, primary key
• hashtag: varchar(30)

image

• image_id: int, primary key
• file_name: varchar(2000)
• post_id: int unsigned

online_user

• session_id: int
• user_id: int, primary key

post

• post_id: int, primary key
• content: tinytext
• location: varchar(30)
• user_id: int

post_hashtag

• post_hashtag_id: int
• post_id: int
• hashtag_id2: int

User

• user_id: int(auto increment), primary key
• email: varchar(50)
• password: varchar(200)
• phone: varchar(11)
• gender: enum('male','female')
• name: varchar(10)
• nickname: varchar(10)
• website: varchar(50)
• introduce: varchar(100)
• profile_image: tinytext

user_comment_like

• user_comment_like_id: int, primary key
• user_id: int unsigned
• comment_id: int unsigned

user_comment_tag

• user_comment_tag_id: int, primary key
• user_id: int unsigned
• comment_id: int unsigned

user_post_like

• user_post_like_id: int, primary key
• user_id: int unsigned
• post_id: int unsigned

user_post_tag

• user_post_tag_id: int, primary key
• user_id: int unsigned
• post_id: int unsigned

Chatting protocol

• use protocol.java file

packet format for make chatting room

type	name	description
int	typeofrequest	type of request number
int	sender	user_id of requst member
ArrayList<Integer>	list	invite chat members

packet format for invite chatting room

type	name	description
int	typeofrequest	type of request number
int	sender	user_id of requst member
String	roomnumber	chat room number with md5
ArrayList<Integer>	list	invite chat members

packet format for remove chatting room

type	name	description
int	typeofrequest	type of request number
int	sender	user_id of requst member
String	roomnumber	chat room number with md5

packet format for send message

type	name	description
int	typeofrequest	type of request number
String	roomnumber	chat room number with md5
int	sender	user_id of requst member
int	message	message content
String	time	time when send messege
boolean	file_exist	Determine if a file exists
String	file_path	Storage Location of sended file in server

request of chat room list

type	name	description
int	typeofrequest	type of request number

Create room number

• roomnumber: md5(number of members + user_id of members + time)
• https://en.wikipedia.org/wiki/MD5

Create user_id number

• user_id: mysql auto increment
• https://dev.mysql.com/doc/refman/5.6/en/innodb-auto-increment-handling.html