Construct/scripts/classes/MenuFormBuilder.js

import { ActionFormData, ModalFormData } from '@minecraft/server-ui';
import { structureCollection } from './StructureCollection';

export class MenuFormBuilder {
    static menuTitle = '§l§2StrucTool §8Menu';

    static buildAllInstanceName() {
        const allInstanceNameForm = new ActionFormData()
            .title(this.menuTitle)
            .body('Select an instance:');
        structureCollection.getInstanceNames().forEach(instanceName => {
            allInstanceNameForm.button(`§2${instanceName}`);
        });
        allInstanceNameForm.button('Create New Instance');
        allInstanceNameForm.button('How to Add New Structures');
        return allInstanceNameForm;
    }

    static buildNewInstance() {
        return new ModalFormData()
            .title(this.menuTitle)
            .textField('Enter a name for the new instance:', 'example_instance')
            .submitButton('Submit');
    }

    static buildAllStructures() {
        const allStructuresForm = new ActionFormData()
            .title(this.menuTitle)
            .body('Select a structure:');
        structureCollection.getWorldStructureIds().forEach(structureId => {
            const structureName = structureId.replace('mystructure:', '');
            allStructuresForm.button(`§2${structureName}`);
        });
        allStructuresForm.button('Other');
        return allStructuresForm;
    }

    static buildOtherStructure() {
        return new ModalFormData()
            .title(this.menuTitle)
            .textField('Enter the Structure ID:', 'example_structure')
            .submitButton('Submit');
    }

    static buildHowToAddNewStructures() {
        let body = "How to Add Structures:\n"
        body += "§7- Save a structure using a structure block or the /structure command.\n"
        body += "§7OR\n"
        body += "§7- Add a mcstructure file to this pack's structures folder. It will not appear in the list of structures, so enter the filename (without '.mcstructure') as the Structure ID.";
        return new ActionFormData()
            .title(this.menuTitle)
            .body(body);
    }
}