Multi-select Omnifocus to Obsidian project/task copy

of-cross-link-2-objects.omnifocusjs

/*{
    "type": "action",
    "targets": ["omnifocus"],
    "author": "Otto Automator",
    "identifier": "com.omni-automation.of.cross-link-2-objects",
    "version": "1.1",
    "description": "Appends a bidirectional link to the Note fields of two selected objects.",
    "label": "Append Bidirectional Link",
    "shortLabel": "Append Bidirectional Link",
    "paletteLabel": "Append Bidirectional Link",
    "image": "link"
}*/
(() => {
    var action = new PlugIn.Action(function(selection, sender){
        // action code
        // selection options: tasks, projects, folders, tags, databaseObjects, allObjects
        var item0 = selection.databaseObjects[0]
        if (item0 instanceof Folder || item0 instanceof Tag){
            var errorID = "A"
                throw {
                    name: "Incompatible Object Type",
                    message: "Bidirectional links currently only work for Projects and Tasks."
                }
        } else {
            var urlStr0 = "omnifocus:///task/"
        }
        var item1 = selection.databaseObjects[1]
        if (item1 instanceof Folder || item1 instanceof Tag){
            var errorID = "B"
                throw {
                    name: "Incompatible Object Type",
                    message: "Bidirectional links currently only work for Projects and Tasks."
                }
        } else {
            var urlStr1 = "omnifocus:///task/"
        }
        fullStr0 = "\n[" + item1.name + "]( " + urlStr1 + item1.id.primaryKey + " )"
        fullStr1 = "\n[" + item0.name + "]( " + urlStr0 + item0.id.primaryKey + " )"
        console.log("Append Link to ", item0.name, ": ", fullStr0)
        item0.appendStringToNote(fullStr0)
        console.log("Append Link to ", item1.name, ": ", fullStr1)
        item1.appendStringToNote(fullStr1)
    });

    action.validate = function(selection, sender){
        // validation code
        // selection options: tasks, projects, folders, tags, databaseObjects, allObjects
        return (
            selection.databaseObjects.length === 2 &&
            (selection.tasks.length + selection.projects.length === 2)
        )        
    };
    
    return action;
})();%

If there is time I'll try to help with questions, but just in case if it would make a difference