Build an Online Store

We are looking to create a store on Shopify, with custom ordering functionality based on a map (google map API) using drawing tools (leaflet) There are two product types, both of which are custom digital products (Type 1, Type 2) Once on the map ordering page: 1. The user can enter a 'name', which becomes a description to add to the product order 2. Ordering Product Type 1 2a. The user can then draw polygons over the map 2b. The polygon(s) 'area' is displayed on the map, with a cost (cost = area x product cost) - some of this code already exists. 2c. The user can then add this information to the cart, with the name entered in step 1. 2d. Upon submitting the order to the cart, the polygons will be written to a KML file which will be added to the product order as an attachment. 2e. Proceed to ordering Product Type 2. 3. As above (2a - 2d) for Product Type 2 4. The user can then return to step 1, for a new order, or proceed to the cart. 5. When the ordering is complete, the customer enters card details for preauthorisation. We perform the work and when ready to deliver, email a link for the customer to download the products and we take the payment from the card.