Zotero Script for moving custom field notes (e.g. imported from Citavi) to some field

moveCostumFieldNotesToField.js

// Move value from #CostumField notes with fixed label
// to a different field. Set these two fields according to your needs.

var label = "Standortsignatur";
var field = "callNumber";
// List of all possible fields:
// https://api.zotero.org/itemFields?pprint=1
var check = true;
var test = false;
var overwrite = false;
var trashNotes = false;

var items = Zotero.getActiveZoteroPane().getSelectedItems();


for (let item of items) {
    if (item.itemType == "note") {
        break;
    }
    noteIDs = item.getNotes();

    for (let nid of noteIDs) {
        let note = Zotero.Items.get(nid);
        var noteHTML = note.getNote();
        var noteText = Zotero.Utilities.unescapeHTML(noteHTML);
        let skip = true;
        for (let tag of note.getTags()) {
            if (tag.tag == "#CustomField") {
                Zotero.log(noteText);
                skip = false;
                break;
            }
        }
        
        if (skip && check) {
            continue;
        }
        Zotero.log(noteText);
        var parts = noteText.split(":");
        if (parts.length >= 2 && parts[0] == label) {
            parts.shift();
            value = parts.join(":").trim();
            var content = item.getField(field);
            if (!content || overwrite) {
                Zotero.log("WRITE '" + value + "' in field " + field);
                if (test) {
                    continue;
                }
                item.setField(field, value);
                item.saveTx();
	            if (trashNotes) {
	                Zotero.Items.trashTx(nid);
	            }
                
            }
        }

    }
}

items;

Here is a preview of its use: