ICOM Term Project - Phase III - Part 1 - ER Diagram Project Title: Stenzyl Members: Carlos N. Abreu Takemura Jean Rodríguez Fabián Zapata

Transcription

1 ICOM Term Project - Phase III - Part 1 - ER Diagram Project Title: Stenzyl Members: Carlos N. Abreu Takemura Jean Rodríguez Fabián Zapata Entity Sets: I. Account Represents the base, private side of the accounts each user has. The information stored in each of these entities are relevant to account management and authentication. A. Account Name - unique name that identifies each account. B. - of the user created account. C. Password - password for the account (must contain at least one uppercase character and one numeral). D. Created_On - keeps track of the date in which the account was created. E. Last Logged In - keeps track of the last time the user logged into their account. F. Tip Jar - associated Paypal account for use as a tip jar. II. Profile Represents the public side of a user's account. This includes the information that is visible on their public profile page, such as their name, age, and a description about themselves. All fields are optional for the user, except the Username field. A. Username - the profile name of the account which is visible to other users. B. Full name - first and last name of the user. C. Bio - user information relevant to his/her profile. D. Age - the age of the user.

2 III. IV. Content Represents pieces of content hosted on the system. Content could be audio, image, or video files. A. Content ID - primary key which segregates user uploaded content. B. Name - title of the uploaded file. C. Description - brief description of the file. D. Age rating - determines for which ages the content is appropriate. E. Views - the amount of views a file has. Specializations(with their additional attributes): - Audio A. Length - length of the audio file. - Video A. Length - length of the video file. B. Resolution - resolution of the video file. - Image A. Resolution - resolution of the image file. Collection Represents collections or groups of content created by users. These can be made public or private. A. Name - contains the title of the collection. B. Private - value stating whether an instance of a collection is only available to the user who created it or available to the public. V. Stream Represents live video streams, broadcasted by users. A. Stream ID - unique identifier for each broadcast. B. Title - contains the title of the stream determined by the streamer. VI. Chat Message (Weak) Represents the individual messages generated by users in a live stream's chat room. A. Message ID - uniquely identifies each chat message in a particular chat room. B. Text - the content of the message.

3 VII. VIII. IX. Chatroom Represents the chat room available in each stream. A. Chat ID - unique identifier for each chat room instance. Private Message(PM) Represents the private messages sent between users. A. PM ID - groups messages by both users. B. Message - contains the text message. C. Subject - contains the title of the message conversation. D. Sent - contains the date in which the message was issued. E. Seen - contains the date in which the message was seen. Tag Represents categorizations of content in a tag-based system. A. Name - the name of the tag

4 Relationship Sets: I. Has (Account-Profile) Connects a single Profile entity with a single Account entity. A. Account B. Profile Cardinality Constraint: 1:1 II. III. IV. Uploaded Connects users with the content they have uploaded. A. Tagged Content (Aggregation) B. User (Aggregation) Relationship A. Timestamp - the date and time that a piece of content was uploaded on Cardinality Constraint: 1:N Rated Connects users with ratings they have placed on other users content. A. Tagged Content (Aggregation) B. User (Aggregation) Relationship A. Timestamp - the date and time that a piece of content was rated by a user. B. Positive - whether the rating was a positive one or not. Cardinality Constraint: N:N Broadcasting Connects a stream to the user who broadcasts it. A. Stream B. User (Aggregation) Relationship A. Started - the date and time a video stream started. B. Key - Verification code that allows the broadcaster to stream video through the server. Cardinality Constraint: 1:1

5 V. Sent Connects private messages between senders and receivers. Roles: A. Sender B. Receiver A. User (Aggregation) B. Private Message Cardinality Constraint: N:N VI. VII. VIII. Tagged Connects a piece of content to a tag. A. Tag B. Content Cardinality Constraint: N:N Contains Connects a collection to its content and indicates the content's position within the collection. A. Collection B. Tagged Content (Aggregation) Relationship A. Index - value used to identify the order of content in the collection. Cardinality Constraint: N:N Created Connects the user to created collections. A. User B. Collection Relationship A. Timestamp - the date and time that a collection was created. Cardinality Constraint: N:1

6 IX. Has (Stream-Chatroom) Connects a stream to its assigned chat room. A. Stream B. Chat Room Cardinality Constraint: 1:1 X. Posted in Connects a chat message with the chat room it was posted in. A. Chat Message B. Chat Room Relationship A. Timestamp - the date and time the chat message was posted. Cardinality Constraint: N:1 XI. XII. Posted Connects messages posted in a chat room with the user that posted it. A. User (Aggregation) B. Chat Messages Posted in a Chat Room (Aggregation) Cardinality Constraint: 1:N Follows Connects the user to other users that they are following. A. User (Aggregation) B. User (Aggregation) Cardinality Constraint: 1:N

7 Aggregations: I. User Entity Sets: A. Account B. Profile Relationship Set: Has(Account-Profile) II. III. Tagged Content Entity Sets: A. Content B. Tag Relationship Set: Tagged Chat Messages Posted in a Chatroom Entity Sets: A. Chatroom B. Chat Message Relationship Set: Posted In

8 ER Diagram