Posts tagged CopySU

I have now added the ‘Copy To’ functionality to CLUMP. It presents a list of the owners reading lists to them with checkboxes and they can select which ones they want to copy the item to. Once they have chosen the lists to copy the item to they click ‘copy’ and it calls LUMP’s CopySU API to copy the structural unit to each reading list selected.

Because the CopySU API can take a while to run at the minute I use the asynchronous aspect of JavaScript to make all the CopySU calls without waiting for the previous one to complete.  This lead to the problem of “how do I wait till all the calls have completed?”.  There is no “wait till all my callbacks have run” option in JavaScript so I ended up having to increment a counter for each call and then have the callback function decrement the counter.  If the counter reaches 0 then the callback function runs the code that we need to run after all of the CopySU API calls have completed (In this case close the popups and reload the current structural unit if it was one of the targets).