Prestashop dropshipping products csv file import

I need a module to import severals dropshipping catalogues on Prestashop. They use basicly the same configuration parent and child with info of parent and variations on child. The module should get the file from an url and insert new products, update already imported products (price and quantity), disable no more available products not more present on file. I should be able to match, for each supplier, a column with a prestashop product caratteristic: id (unique for each supplier), category, brand, title, description, variation (size and color) with his quantity and barcode, reference, features (can be more than one column), tags, weight (with conversion from grams to Kg if needed), dimensions (with conversions from mm to cm if needed), images (can be in severals column or in one with separator), wholesale price and sell price (with extracharge). The script need: - use the native Prestashop classes, like the native csv import, expecially for import pictures - use ajax call to add product to avoid timeout for big catalogues - script can be called by cron to automate the procedure - have settings for each supplier on database - i need a setting page where I can put the supplier url and match all info: type of file, column with presta caratteristic, pattern for create title (like: {col2} - {col5} {col7}), ecc. - features: search if it already exist on db otherwise create it For each supplier file: - matched supplier category with store category - parent qualifier: usually the file have a fix text to identify the parent and the child (like: PRODUCT or PARENT). - set main separetor, element separetor and qualifier method (like: separetor -> comma, element separetor -> pipeline, qualifier -> quotes) for "test1|test2","test3" - make a title with file information - language of the file - set a recharge on price - set a defoult (one or more) store (for multistore option) or store group