Create FileInputField component (#219)

src/lib/components/ui/FileInputField/FileInputField.jsx

@@ -0,0 +1,157 @@
+import PropTypes from 'prop-types';
+import React from 'react';
+import getRootValidationStateClassName from '../../../helpers/getRootValidationStateClassName';
+import { withProviderContext } from '../../../provider';
+import transferProps from '../../../utils/transferProps';
+import withForwardedRef from '../withForwardedRef';
+import styles from './FileInputField.scss';
+
+export const FileInputField = ({
+  changeHandler,
+  disabled,
+  forwardedRef,
+  fullWidth,
+  helpText,
+  id,
+  inFormLayout,
+  isLabelVisible,
+  label,
+  layout,
+  required,
+  validationState,
+  validationText,
+  ...restProps
+}) => (
+  <label
+    className={[
+      styles.root,
+      fullWidth ? styles.isRootFullWidth : '',
+      inFormLayout ? styles.isRootInFormLayout : '',
+      layout === 'horizontal' ? styles.rootLayoutHorizontal : styles.rootLayoutVertical,
+      disabled ? styles.isRootDisabled : '',
+      required ? styles.isRootRequired : '',
+      getRootValidationStateClassName(validationState, styles),
+    ].join(' ')}
+    htmlFor={id}
+    id={`${id}__label`}
+  >
+    <div
+      className={[
+        styles.label,
+        isLabelVisible ? '' : styles.isLabelHidden,
+      ].join(' ')}
+      id={`${id}__labelText`}
+    >
+      {label}
+    </div>
+    <div className={styles.field}>
+      <div className={styles.inputContainer}>
+        <input
+          {...transferProps(restProps)}
+          className={styles.input}
+          disabled={disabled}
+          id={id}
+          onChange={changeHandler}
+          ref={forwardedRef}
+          required={required}
+          type="file"
+        />
+      </div>
+      {helpText && (
+        <div
+          className={styles.helpText}
+          id={`${id}__helpText`}
+        >
+          {helpText}
+        </div>
+      )}
+      {validationText && (
+        <div
+          className={styles.validationText}
+          id={`${id}__validationText`}
+        >
+          {validationText}
+        </div>
+      )}
+    </div>
+  </label>
+);
+
+FileInputField.defaultProps = {
+  changeHandler: null,
+  disabled: false,
+  forwardedRef: undefined,
+  fullWidth: false,
+  helpText: null,
+  inFormLayout: false,
+  isLabelVisible: true,
+  layout: 'vertical',
+  required: false,
+  validationState: null,
+  validationText: null,
+};
+
+FileInputField.propTypes = {
+  /**
+   * Function to call when the input has changed.
+   */
+  changeHandler: PropTypes.func,
+  /**
+   * If `true`, the input will be disabled.
+   */
+  disabled: PropTypes.bool,
+  /**
+   * Reference forwarded to the `input` element.
+   */
+  forwardedRef: PropTypes.oneOfType([
+    PropTypes.func,
+    // eslint-disable-next-line react/forbid-prop-types
+    PropTypes.shape({ current: PropTypes.any }),
+  ]),
+  /**
+   * If `true`, the field will span the full width of its parent.
+   */
+  fullWidth: PropTypes.bool,
+  /**
+   * Optional help text.
+   */
+  helpText: PropTypes.node,
+  /**
+   * ID of the input HTML element. It also serves as a prefix for important inner elements:
+   * `<ID>__label`, `<ID>__labelText`, `<ID>__helpText`, and `<ID>__validationText`.
+   */
+  id: PropTypes.string.isRequired,
+  /**
+   * Treat the field differently when it's inside a FormLayout. Do not set manually!
+   */
+  inFormLayout: PropTypes.bool,
+  /**
+   * If `false`, the label will be visually hidden (but remains accessible by assistive
+   * technologies).
+   */
+  isLabelVisible: PropTypes.bool,
+  /**
+   * Text field label.
+   */
+  label: PropTypes.string.isRequired,
+  /**
+   * Layout of the field.
+   */
+  layout: PropTypes.oneOf(['horizontal', 'vertical']),
+  /**
+   * If `true`, the input will be required.
+   */
+  required: PropTypes.bool,
+  /**
+   * Alter the field to provide feedback based on validation result.
+   */
+  validationState: PropTypes.oneOf(['invalid', 'valid', 'warning']),
+  /**
+   * Validation message to be displayed.
+   */
+  validationText: PropTypes.node,
+};
+
+export const FileInputFieldWithContext = withForwardedRef(withProviderContext(FileInputField, 'FileInputField'));
+
+export default FileInputFieldWithContext;

src/lib/components/ui/FileInputField/FileInputField.scss

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+@use '../../../styles/tools/form-fields/box-field-elements';
+@use '../../../styles/tools/form-fields/box-field-layout';
+@use '../../../styles/tools/form-fields/foundation';
+@use '../../../styles/tools/form-fields/relationships';
+@use '../../../styles/tools/form-fields/variants';
+@use '../../../styles/tools/accessibility';
+
+// Foundation
+.root {
+  @include foundation.root();
+  @include relationships.horizontal-neighbor();
+}
+
+.label {
+  @include foundation.label();
+}
+
+.inputContainer {
+  @include box-field-elements.input-container();
+}
+
+.input {
+  @include accessibility.focus-ring();
+}
+
+.helpText,
+.validationText {
+  @include foundation.help-text();
+}
+
+.isRootRequired .label {
+  @include foundation.label-required();
+}
+
+// States
+.isRootStateInvalid {
+  @include variants.validation(invalid);
+}
+
+.isRootStateValid {
+  @include variants.validation(valid);
+}
+
+.isRootStateWarning {
+  @include variants.validation(warning);
+}
+
+// Invisible label
+.isLabelHidden {
+  @include accessibility.hide-text();
+}
+
+// Layouts
+.rootLayoutVertical,
+.rootLayoutHorizontal {
+  @include box-field-layout.vertical();
+}
+
+.rootLayoutHorizontal {
+  @include box-field-layout.horizontal();
+}
+
+.isRootFullWidth {
+  @include box-field-layout.full-width();
+  @include relationships.vertical-neighbor();
+}
+
+.isRootInFormLayout {
+  @include box-field-layout.in-form-layout();
+}