PromucFlow_constructor/app/client/src/widgets/FormWidget.tsx

import React from "react";
import _ from "lodash";
import { WidgetProps } from "./BaseWidget";
import { WidgetType } from "constants/WidgetConstants";
import ContainerWidget, { ContainerWidgetProps } from "widgets/ContainerWidget";
import { ContainerComponentProps } from "components/designSystems/appsmith/ContainerComponent";
import shallowEqual from "shallowequal";

class FormWidget extends ContainerWidget {
  checkInvalidChildren = (children: WidgetProps[]): boolean => {
    return _.some(children, child => {
      if ("children" in child) return this.checkInvalidChildren(child.children);
      if ("isValid" in child) return !child.isValid;
      return false;
    });
  };

  handleResetInputs = () => {
    super.resetChildrenMetaProperty(this.props.widgetId);
  };

  componentDidMount() {
    super.componentDidMount();
    this.updateFormData();
  }

  componentDidUpdate(prevProps: ContainerWidgetProps<any>) {
    super.componentDidUpdate(prevProps);
    this.updateFormData();
  }

  updateFormData() {
    if (this.props.children) {
      const formData = this.getFormData(this.props.children[0]);
      if (!shallowEqual(formData, this.props.data)) {
        this.updateWidgetMetaProperty("data", formData);
      }
    }
  }

  getFormData(formWidget: ContainerWidgetProps<WidgetProps>) {
    const formData: any = {};
    if (formWidget.children)
      formWidget.children.forEach(widgetData => {
        if (widgetData.value) {
          formData[widgetData.widgetName] = widgetData.value;
        }
      });
    return formData;
  }

  renderChildWidget(childWidgetData: WidgetProps): React.ReactNode {
    if (childWidgetData.children) {
      const isInvalid = this.checkInvalidChildren(childWidgetData.children);
      childWidgetData.children.forEach((grandChild: WidgetProps) => {
        if (isInvalid) grandChild.isFormValid = false;
        // Add submit and reset handlers
        grandChild.onReset = this.handleResetInputs;
      });
    }
    return super.renderChildWidget(childWidgetData);
  }

  getWidgetType(): WidgetType {
    return "FORM_WIDGET";
  }
}

export interface FormWidgetProps extends ContainerComponentProps {
  name: string;
  data: object;
}

export default FormWidget;