How to insert a link into the text by JS?

[Witdo0192]

Hello, I haven't programmed before, but I tried make a plugin to generate links by selected cells and place the links in the text. I figured out a bit about link generation, but I didn't understand how to get the page id via JS.
Tell me, please:

1. how can I get the page id by JS (now I manually find out the page id and create a block with the id "id_page" and write the page id into the content and read it by JS, but this is clumsy)?;
2. how to insert a link into the text by JS?

The plugin code:

Draw.loadPlugin(function (ui) {
    mxResources.parse('generate_link=generate link');

    var graph = ui.editor.graph;
    var cell_id;
    var page_id;

    ui.actions.addAction('generate_link', function () {
        graph.getModel().beginUpdate();
        try {
            var my_cells = graph.getSelectionCells();
            cell_id =  my_cells[0].getId();
            for (let i = 1; i < my_cells.length; i++) {
              cell_id = cell_id + '","' + my_cells[i].getId();
            }
            page_id = graph.getModel().getCell('id_page').getAttribute('label');
            var my_link = 'data:action/json,{"actions":[{"open":"data:page/id,' + page_id + '"},{"select":{"cells":["' + cell_id + '"]}},{"highlight":{"cells":["' + cell_id + '"],"opacity":100,"color":"red"}}]}';
            navigator.clipboard.writeText(my_link);
        } finally {
        graph.getModel().endUpdate();
        }
    }, null, null, 'F1');

    ui.keyHandler.bindAction(112, false, 'generate_link');

    ui.menubar.addMenu('My Menu', function(menu, parent) {
        ui.menus.addMenuItem(menu, 'generate_link');
    });

    ui.menubar.container.insertBefore(ui.menubar.container.LastChild, ui.menubar.container.lastChild.previousSibling);
});