Prestashop enhancement

Prestashop extension. Functionality: [Customer - View]: The Customer see no price for a Product, but a button to add the product (including the quantity of product) to the cart for quotation request. Shopping cart and checkout process (Checkout) work as usual, with the difference that no Prices are displayed. On checkout, a text have to be output (can be maintained over the Area "translation" in the backend), which informed the customer that he now can request a price for the selected item in the cart. The customer sends the request and receives a confirmation for his request (Text must be editable via " translations → Mail"). The confirmation Mail show the info about the requested items and amounts and confirm that the request was arrived in the Shop. [Store Owner - View]: The store owner will receive a mail about the new price request. He sees the request either to a newly designed area called "quote requests" under the menu item "order", or in the regular Order Section (Order - Order) The operator sees the quote request for products in tabular form. The structure of the table should look like this (based on the attached Screenshot and "Order->Order" Section in Backend): Item Image | Item Description | Single Price | Price Offer per Item | Price binding The Articles in the Table are fetched from the Shop. "Single Price" = the Price for the item which is saved as default-price for each item. Price Offer per Item = "inputfifeld" the Price per Item which should be send to the customer "Price Binding" = Chechbox. Activated= Price bind to the requested amount of the customer; deactivated = price bind to item [customer could change the ammount after recieved the offer.] If you enter a Price to "Price Offer per item", the sum should be calculatet at the end of the Row (and to the "Total Sum" below the last Column. If Store Owner saved the input, an email will be send to the customer again, with the offer he made. The Data (Price offer) should be saved to the account of the customer (like a normal order). [Customer - View]: The Customer recieved the offer. A Hyperlink point back to the Onlineshop. On this Page the customer sees an overwiew of his request, with the offer the Store owner made (same tablestructure like above). In this overwiew the customer have to choose which items he like to buy. If the Store Owner bind the price to the amount of the requested Product, the customer only can choose to "order, or not" this Item. If the Store Owner bind the price to the item instead of the ammount, the customer able to change the amount in a textfield. In this way the sum should be recalculated directly on the Page. After aggree to Disclaimer, Terms and Conditions ... the customer can place the Order. [Store Owner - View]: The following order process continues as normal. The operator receives a notification that a new Order has been received, it can edit, .... Technical Requirements: - Multishop support (where single shops may use or not use this module). - Upgradesave (Prestashop Core-Files are not touched, or upgradesave) - Prestashop Version 1.5.6.2 and above