class DiagramsMenuItemDispatcher extends AbstractMenuItemDispatcher {
    static isAvailable(schema) {
        return !!schema.nodes.diagrams;
    }

    static getMenuItem(schema) {
        if (!this.isAvailable(schema)) {
            throw new Error('Diagrams is missing in provided Schema!');
        }

        return new MenuItem({
            command: (state, dispatch) => {
                const { $from } = state.selection;
                const index = $from.index();
                if (!$from.parent.canReplaceWith(index, index, schema.nodes.diagrams)) {
                    return false;
                }
                if (dispatch) {
                    let textContent = '';
                    state.selection.content().content.descendants((node) => {
                        textContent += node.textContent;
                        return false;
                    });

                    const dForm = new DiagramsForm('diagrams-form');
                    if (textContent) {
                        dForm.setSource(textContent);
                    }

                    dForm.show();

                    dForm.on('submit', DiagramsForm.resolveSubmittedLinkData(
                        {},
                        dForm,
                        (newAttrs) => {
                            dispatch(state.tr.replaceSelectionWith(schema.nodes.diagrams.create(newAttrs)));
                            dForm.off('submit');
                            dForm.hide();
                            dForm.resetForm();
                        },
                    ));
                }
                return true;
            },
            icon: document.createElement('span'), // FIXME
            label: LANG.plugins.diagrams['PMMenuItem'],
        });
    }
}