Editing SimTX API/Packets/CatalogUpload (section)

== Validation ==
The server checks the upload against the [[SimTX API/Extension catalog protocol#Upload rules|upload rules]]. A refused upload is answered with [[SimTX API/Packets/Error|Error]] whose <code>message</code> names the first problem found:
* <code>FORBIDDEN</code>: <i>Publishing requires catalog.publish</i>, or the name belongs to another account (<i>An item named 'X' already exists (by Author)</i>).
* <code>INVALID_REQUEST</code>: an unknown kind, a preset that is not exactly one <code>.stxpreset</code> file, an invalid path, name, category or manifest. Manifest errors are passed through verbatim.
* <code>LIMIT_REACHED</code>: <i>Catalog entry quota reached (32)</i>, <i>Catalog storage quota reached</i>, <i>Server catalog storage is full</i>.
* <code>UNAVAILABLE</code>: <i>This server has no catalog</i>, <i>The catalog is temporarily unavailable</i>.
* <code>INTERNAL</code>: <i>Could not store the item</i>.

Show the message to the user; it says what to fix.