Authors: Shaunak Pethe, Huzaifah Munshi, Abhishek Polekar, Shirish Sabnis
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Auctions are processes where selling and buying of products takes place by offering them for a bid and the buyer with the highest bid price buys the product or the seller with lowest ask price sells the product. Due to the emergence of e-commerce , the world has become a universal marketplace which grants every individual the right to become a seller and buyer of products irrespective of geographical barriers. In this project, we aim to create a web application for online auction system where every product is offered for bidding and the interested buyers can bid on them and buy them at fair prices. We have used the ReactJS library for developing the frontend and Django for the backend development. Initially, we have created an e-commerce web application prototype with all the typical features in it like user and admin system, login / authentication system, catalogue of products, shopping cart, payment page,etc. We have introduced bidding functionality after development of the base e-commerce system. The purpose of this project is to create a simulated environment for research in this domain to test the different fraud detection algorithms for shill bidding , bid shielding, etc.
II. SYSTEM ANALYSIS
A. Use Case Diagram
A use case diagram is used to identify, clarify and organize user requirements and shows how a system interacts with the external entities. There are three participants in our system – bidder , seller and admin. Each one has their own use cases like:
a. Bidder can search for a product
b. Bidder can view product details
c. Bidder can make a bid for product
d. Bidder can edit profile information.
e. Ask questions about product
a. Seller can post a product
b. Seller can allot time limit and initial price for product bidding.
c. Seller can view bidding information
d. Seller can edit profile information
a. Admin can manage products
b. Admin can manage users
c. Admin can manage bidding
d. Admin can view visualizations for bidding data.
B. Sequence Diagram
A sequence diagram shows the interaction between different objects in a sequential manner. It depicts the order of interaction between objects in the system. These diagrams are used to analyse and model the usage scenarios in the system. For example, in our system, the given sequence diagram is drawn for a buyer who bids for the first time on a product.
???????C. Class Diagram
The class diagram helps to define the kinds of objects that are present in the system and describes the static relationships between the system internal classes .It shows the attributes and operations of a class along with the constraints that apply that apply to the objects connection .
???????D. Data Flow Diagram
Data flow diagrams are used to present the data transformation in the system and serves as a visual tool to depict logical models. Data flow diagrams help in the analysis and requirement stage of development to model the details of the data flows in the system. According to the degree of detail, data flow diagrams are of three levels, level 0 , level 1 and level 2. The main components of data flow diagrams are process, data flow , data store and external entity.
III. SYSTEM IMPLEMENTATION
The customer has to register themselves in the application to enter the application. The registered users can login into the system using their usernames and passwords. The customer searches for the product of their choice and places a bid for a given product which is recorded in a database. Other customers who view the product also place their bids on the product which is visible to all those who view the product. The bidding policy implemented is given below:
After every bid, we increase the reserve price of the product by 10 percent. The price of the product is incremented using compounding. The idea behind using compounding is to reduce the number of bids after a given number of bids are placed. The product also has a bid timer which shows the time for which bidding on the product is active.
A. For the Frontend of the Application
B. For the Backend of the Application
1. The product interface shows the product details along with it’s initial price and status with the option to bid on the product.
2. The bidding summary interface displays the count of bidders on a given product along with the visualization of bid price progression over time.
3. The user information model in the Django based backend shows the details of the users registered in the application
This paper and the research behind it would not have been possible without the exceptional support of our project guide and
supervisor, Mr. Shirish Sabnis. His enthusiasm, knowledge and exact attention to detail have been an inspiration and kept the work on track from the beginning. We would also like to thank our friends and family who supported us and also offered deep insight into the study.
This paper employs the best practices in building a web application for online auctions. We have designed, analyzed and implemented a web application for online auctions using UML, React library and Django framework. We have used UML to add functions using class diagrams, use case diagrams, data flow diagrams, sequence diagrams,etc. The application allows the bidder for quick bidding and sellers to achieve maximum profit. React library allows the development of a single page application which does not reload while navigating through each page.The backend of the system is developed by using the Django framework which makes it easier to achieve modular development. Future works involve adding new functionalities to the system like verifying users’ identity, support different types of auctions, a mechanism to remove spurious and inactive accounts to improve system performance.
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Copyright © 2022 Shaunak Pethe, Huzaifah Munshi, Abhishek Polekar, Shirish Sabnis. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.