2011/3/17 pete huerter <pete.huerter@gmail.com>
Hi list,
I am trying to understand all code related to barcodes.
1. It appears that C4::Barcodes is only used in additem.pl. Additem.pl appears not to be involved in batch processing.
I can't speak to batch processing as I've not slogged through that section of code, but a quick grep of the codebase shows C4::Barcodes being used in multiple places... about 48...
2. 952$p (barcode) does not appear in the Add Item Koha screen, so the plugin is not callable.
If all this is true, then whey is there a barcode.pl value_builder? When would it be called?
952$p visibility is based on your framework. Using the default "Books, Booklets, Workbooks" framework it is visible. (See http://tinyurl.com/68ngc74) That is where it is called from. It populates when that field gets the focus iirc.
Is the barcode.pl value_builder only invoked when AutoBarcode type is "NONE"? In which case the code in barcode.pl value_builder effectively replaces that in C4::Barcodes? (the logic of the various barcode types appears to be duplicated in barcode.pl).
C4::Barcode is used by additem.pl when adding multiple copies. The plugin only supplies a single barcode value to the 952$p field. C4::Barcode has a next_value method which will take a barcode and return the next valid value among other methods. You'll just have to read through the code to discover the methods and what they do as the POD is non-existent... which I'm sure you've done and noticed.... ;-)
Can I just customize barcode.pl to effectively solve the problem of assigning barcodes leaving C4::Barcodes, and C4/Barcodes/* untouched? -or- are is modification of both methods necessary for some reason?
I would say that for the moment you need to mod both or the ability to add multiple items might be broken. Kind Regards, Chris