Implement soft required validation

src/formio/components/FileField.js

@@ -4,7 +4,7 @@ import {Formio} from 'react-formio';
 
 import {CSRFToken} from 'headers';
 
-import {applyPrefix, setErrorAttributes} from '../utils';
+import {applyPrefix, linkToSoftRequiredDisplay, setErrorAttributes} from '../utils';
 
 const addCSRFToken = xhr => {
   const csrfTokenValue = CSRFToken.getValue();
@@ -291,9 +291,13 @@ class FileField extends Formio.Components.components.file {
     return super.validatePattern(file, val);
   }
 
-  setErrorClasses(elements, dirty, hasErrors, hasMessages) {
+  _getTargetElements() {
     const input = this.refs.fileBrowse;
-    const targetElements = input ? [input] : [];
+    return input ? [input] : [];
+  }
+
+  setErrorClasses(elements, dirty, hasErrors, hasMessages) {
+    const targetElements = this._getTargetElements();
     setErrorAttributes(targetElements, hasErrors, hasMessages, this.refs.messageContainer.id);
     return super.setErrorClasses(targetElements, dirty, hasErrors, hasMessages);
   }
@@ -313,7 +317,12 @@ class FileField extends Formio.Components.components.file {
       return false;
     }
 
-    return super.checkComponentValidity(data, dirty, row, options);
+    const result = super.checkComponentValidity(data, dirty, row, options);
+
+    const targetElements = this._getTargetElements();
+    linkToSoftRequiredDisplay(targetElements, this);
+
+    return result;
   }
 
   deleteFile(fileInfo) {

src/formio/components/SoftRequiredErrors.js

@@ -0,0 +1,63 @@
+import FormioUtils from 'formiojs/utils';
+import {Formio} from 'react-formio';
+
+const FormioContentField = Formio.Components.components.content;
+
+class SoftRequiredErrors extends FormioContentField {
+  static schema(...extend) {
+    return FormioContentField.schema(
+      {
+        type: 'softRequiredErrors',
+        key: 'softRequiredErrors',
+        label: '', // not displayed anyway
+      },
+      ...extend
+    );
+  }
+
+  constructor(component, options, data) {
+    component.refreshOnChange = true;
+    super(component, options, data);
+  }
+
+  get content() {
+    // figure out which components use soft required validation
+    const softRequiredComponents = [];
+    FormioUtils.eachComponent(this.root.components, component => {
+      if (component.component.openForms?.softRequired) {
+        softRequiredComponents.push(component);
+      }
+    });
+
+    const missingFieldLabels = [];
+    // check which components have an empty value
+    for (const component of softRequiredComponents) {
+      const isEmpty = component.isEmpty();
+      if (isEmpty) missingFieldLabels.push(component.label);
+    }
+
+    if (!missingFieldLabels.length) return '';
+
+    const missingFieldsMarkup = this.renderTemplate('missingFields', {labels: missingFieldLabels});
+    const content = this.interpolate(this.component.html, {
+      missingFields: missingFieldsMarkup,
+    });
+
+    return `
+      <div
+        id="${this.id}-content"
+        class="utrecht-alert utrecht-alert--warning openforms-soft-required-errors"
+        role="status"
+      >
+        <div class="utrecht-alert__icon">
+          <i class="fa fas fa-exclamation-triangle"></i>
+        </div>
+        <div class="utrecht-alert__message">
+          ${content}
+        </div>
+      </div>
+    `;
+  }
+}
+
+export default SoftRequiredErrors;

src/formio/components/SoftRequiredErrors.stories.js

@@ -0,0 +1,111 @@
+import {expect, userEvent, waitFor, within} from '@storybook/test';
+
+import {withUtrechtDocument} from 'story-utils/decorators';
+import {sleep} from 'utils';
+
+import {UPLOAD_URL, mockFileUploadDelete, mockFileUploadPost} from './FileField.mocks';
+import {MultipleFormioComponents} from './story-util';
+
+export default {
+  title: 'Form.io components / Custom / SoftRequiredErrors',
+  decorators: [withUtrechtDocument],
+  render: MultipleFormioComponents,
+  args: {
+    components: [
+      {
+        type: 'file',
+        key: 'file',
+        storage: 'url',
+        url: UPLOAD_URL,
+        label: 'Soft required file',
+        multiple: false,
+        openForms: {softRequired: true},
+      },
+      {
+        type: 'textfield',
+        key: 'textfield',
+        label: 'Soft required text',
+        openForms: {softRequired: true},
+      },
+      {
+        type: 'softRequiredErrors',
+        html: `
+        <p>Not all required fields are filled out. That can get expensive!</p>
+
+        {{ missingFields }}
+
+        <p>Are you sure you want to continue?</p>
+          `,
+      },
+    ],
+  },
+
+  argTypes: {
+    components: {table: {disable: true}},
+    evalContext: {table: {disable: true}},
+  },
+  parameters: {
+    controls: {sort: 'requiredFirst'},
+    msw: {
+      handlers: [mockFileUploadPost, mockFileUploadDelete],
+    },
+  },
+};
+
+export const EmptyFields = {
+  play: async ({canvasElement}) => {
+    const canvas = within(canvasElement);
+
+    await canvas.findByText('Not all required fields are filled out. That can get expensive!');
+    const list = await canvas.findByRole('list', {name: 'Empty fields'});
+    const listItems = within(list).getAllByRole('listitem');
+    expect(listItems).toHaveLength(2);
+    const content = listItems.map(item => item.textContent);
+    expect(content).toEqual(['Soft required file', 'Soft required text']);
+  },
+};
+
+export const FillField = {
+  args: {
+    components: [
+      {
+        type: 'textfield',
+        key: 'textfield',
+        label: 'Soft required text',
+        openForms: {softRequired: true},
+      },
+      {
+        type: 'softRequiredErrors',
+        html: `
+        <p>Not all required fields are filled out. That can get expensive!</p>
+
+        {{ missingFields }}
+
+        <p>Are you sure you want to continue?</p>
+          `,
+      },
+    ],
+  },
+  play: async ({canvasElement, step}) => {
+    const canvas = within(canvasElement);
+    // formio... :thisisfine:
+    await sleep(100);
+
+    const ERROR_TEXT = 'Not all required fields are filled out. That can get expensive!';
+
+    await step('Initial state', async () => {
+      expect(await canvas.findByText(ERROR_TEXT)).toBeVisible();
+      const list = await canvas.findByRole('list', {name: 'Empty fields'});
+      const listItems = within(list).getAllByRole('listitem');
+      expect(listItems).toHaveLength(1);
+    });
+
+    await step('Fill out field and remove error', async () => {
+      const input = canvas.getByLabelText('Soft required text');
+      await userEvent.type(input, 'Not empty');
+      await waitFor(() => {
+        expect(canvas.queryByText(ERROR_TEXT)).toBeNull();
+      });
+    });
+  },
+};

src/formio/components/TextField.js

@@ -2,7 +2,7 @@ import debounce from 'lodash/debounce';
 import {Formio} from 'react-formio';
 
 import {get} from '../../api';
-import {setErrorAttributes} from '../utils';
+import {linkToSoftRequiredDisplay, setErrorAttributes} from '../utils';
 import enableValidationPlugins from '../validators/plugins';
 
 const POSTCODE_REGEX = /^[0-9]{4}\s?[a-zA-Z]{2}$/;
@@ -35,7 +35,11 @@ class TextField extends Formio.Components.components.textfield {
     if (this.component.validate.plugins && this.component.validate.plugins.length) {
       updatedOptions.async = true;
     }
-    return super.checkComponentValidity(data, dirty, row, updatedOptions);
+    const result = super.checkComponentValidity(data, dirty, row, updatedOptions);
+
+    linkToSoftRequiredDisplay(this.refs.input, this);
+
+    return result;
   }
 
   setErrorClasses(elements, dirty, hasErrors, hasMessages) {

src/formio/components/TextField.spec.js

@@ -185,3 +185,61 @@ describe('The mutiple text component', () => {
     expect(form.isValid()).toBeTruthy();
   });
 });
+
+// This is not officially supported yet... but due to the generic implementation it
+// works. It is/was intended for file fields only at first.
+describe('Textfield with soft required validation', () => {
+  afterEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  test('The softRequiredErrors component is linked', async () => {
+    const user = userEvent.setup({delay: 50});
+    const FORM = {
+      type: 'form',
+      components: [
+        {
+          type: 'textfield',
+          key: 'textfield',
+          label: 'Text',
+          validate: {required: false},
+          openForms: {softRequired: true},
+        },
+        {
+          id: 'softReq123',
+          type: 'softRequiredErrors',
+          key: 'softRequiredErrors',
+          html: `{{ missingFields }}`,
+        },
+      ],
+    };
+    const {form} = await renderForm(FORM);
+
+    const input = screen.getByLabelText('Text');
+
+    // Trigger validation
+    await user.type(input, 'foo');
+    await user.clear(input);
+    // Lose focus of input
+    await user.tab({shift: true});
+
+    // Input is invalid and should have aria-describedby and aria-invalid
+    expect(input).not.toHaveClass('is-invalid');
+    expect(input).toHaveAttribute('aria-describedby');
+    expect(input).not.toHaveAttribute('aria-invalid', 'true');
+    expect(form.isValid()).toBeTruthy();
+
+    // check that it points to a real div
+    const expectedDiv = document.getElementById(input.getAttribute('aria-describedby'));
+    expect(expectedDiv).not.toBeNull();
+
+    await user.type(input, 'foo');
+    await user.tab({shift: true});
+
+    // Input is again valid and without aria-describedby and aria-invalid
+    expect(input).not.toHaveClass('is-invalid');
+    expect(input).not.toHaveAttribute('aria-describedby');
+    expect(input).not.toHaveAttribute('aria-invalid');
+    expect(form.isValid()).toBeTruthy();
+  });
+});

src/formio/module.js

@@ -22,6 +22,7 @@ import PostcodeField from './components/PostcodeField';
 import Radio from './components/Radio';
 import Select from './components/Select';
 import Selectboxes from './components/Selectboxes';
+import SoftRequiredErrors from './components/SoftRequiredErrors';
 import TextArea from './components/TextArea';
 import TextField from './components/TextField';
 import TimeField from './components/TimeField';
@@ -55,6 +56,7 @@ const FormIOModule = {
     coSign: CoSignOld,
     cosign: Cosign,
     editgrid: EditGrid,
+    softRequiredErrors: SoftRequiredErrors,
   },
   providers: {
     storage: {url: CSRFEnabledUrl},

src/formio/templates/library.js

@@ -10,6 +10,7 @@ import {default as FieldSetTemplate} from './fieldset.ejs';
 import {default as FileTemplate} from './file.ejs';
 import {default as LabelTemplate} from './label.ejs';
 import {default as MapTemplate} from './map.ejs';
+import {default as MissingFieldsTemplate} from './missingFields.ejs';
 import {default as MultiValueRowTemplate} from './multiValueRow.ejs';
 import {default as MultiValueTableTemplate} from './multiValueTable.ejs';
 import {default as RadioTemplate} from './radio.ejs';
@@ -20,6 +21,7 @@ import {default as TextTemplate} from './text.ejs';
 const OFLibrary = {
   component: {form: ComponentTemplate},
   field: {form: FieldTemplate}, // wrapper around the individual field types
+  missingFields: {form: MissingFieldsTemplate},
 
   button: {form: ButtonTemplate},
   checkbox: {form: CheckboxTemplate},

src/formio/templates/missingFields.ejs

@@ -0,0 +1,8 @@
+<span class="sr-only" id="{{ctx.id}}-missing-fields-header">
+  {{ ctx.t('Empty fields') }}
+</span>
+<ul class="utrecht-unordered-list openforms-soft-required-errors__missing-fields" aria-labelledby="{{ctx.id}}-missing-fields-header">
+{% for (const label of ctx.labels) { %}
+  <li class="utrecht-unordered-list__item">{{ label }}</li>
+{% } %}
+</ul>