This commit completely rewrites the extract_item and extract_items
function. Before this commit these two function were an unreadable
mess. The extract_item function was a lengthy if-elsif chain
while the extract_items function contained an incomprehensible
mess of .try, else and ||.
With this commit both of these functions have been pulled into a
separate file with the internal logic being moved to a few classes.
This significantly reduces the size of these two methods, enhances
readability and makes adding new extraction/parse rules much simpler.
See diff for details.
a027fbf7af