Create a Woocommerce Plugin

This is a woocommerce plugin development. What we are doing: 1. Cooperating with another website to attract more customers to our one 2. Identify the customers directed by that website 3. All purchases made by those customers will generate profits for the other website 4. Therefore we need to analyse the purchases made by those customers What we need you to do: 1. Produce a woocommerce plugin 2. The plugin needs to identify customers directed to our website by the other website: a) The other website will have our products showing on their website, having a link to our one. The link will be like [login to view URL] b) When the customers click this link and come to our website, the backend first identify the source code. This source code is unique. Every website will have its own source code. c) Then the program needs to remember this source code for this customer, like storing in session, etc. d) Then when the customer register, the program write the source code and user id to the database that will prove this customer is from that website. 3. The plugin needs to manage the sources, providing functions to add\edit\delete sources(participating websites). Each source will have their own source code. The source code will be made manually so don't need to write a function to generate it. 4. The plugin needs to have a function to set a settlement period. This period is used for point 6. 5. The plugin needs to have analytic functions. For each source, it needs to display diagrams for us to analyse the sales results. 6. It will also need to generate a document(PDF) displaying contents including: a) Products sold in the previous settlement period. Including Brands(We are using woocommerce's brand extension), Product names, quantities, specs, variation details(if it's a variable product) and bundle details(if it's a bundled product, this is an extension from Woocommerce) b) Total sales amount. c) Listing customers purchases details, including Order number, amount of order, date purchased What standard we are expecting: 1. Well documented code 2. Clean and lined up 3. Clear and safe logic 4. Hackers proof, needs to be solid to any sort of injection attacks 5. Data structure needs to be consistent so we can transfer to Laravel in the future How much time we are giving you: 12 Calendar Days