feat: abstruct exchange rate input group component.

src/components/ExchangeRate/ExchangeRateInput.js

@@ -0,0 +1,52 @@
+import React from 'react';
+import styled from 'styled-components';
+import { ControlGroup } from '@blueprintjs/core';
+
+import { FlagTag } from '../Tags';
+import { FMoneyInputGroup, FFormGroup } from '../Forms';
+
+export function ExchangeRateInputGroup({
+  fromCurrency,
+  toCurrency,
+  inputGroupProps,
+  formGroupProps,
+  name,
+}) {
+  return (
+    <FFormGroup inline={true} {...formGroupProps} name={name}>
+      <ControlGroup>
+        <ExchangeRatePrepend>
+          <FlagTag flage={'US'} /> 1 {fromCurrency} =
+        </ExchangeRatePrepend>
+        <ExchangeRateField
+          allowDecimals={false}
+          allowNegativeValue={true}
+          {...inputGroupProps}
+          name={name}
+        />
+        <ExchangeRateAppend>
+          <FlagTag flage={'LY'} /> {toCurrency}
+        </ExchangeRateAppend>
+      </ControlGroup>
+    </FFormGroup>
+  );
+}
+
+const ExchangeRateField = styled(FMoneyInputGroup)`
+  max-width: 88px;
+`;
+
+const ExchangeRateSideIcon = styled.div`
+  display: flex;
+  align-items: center;
+  font-size: 12px;
+  line-height: 1;
+`;
+
+const ExchangeRatePrepend = styled(ExchangeRateSideIcon)`
+  padding-right: 8px;
+`;
+
+const ExchangeRateAppend = styled(ExchangeRateSideIcon)`
+  padding-left: 8px;
+`;

src/components/ExchangeRate/index.js

@@ -0,0 +1 @@
+export * from './ExchangeRateInput';

src/components/Forms/FFormGroup.tsx

@@ -0,0 +1,49 @@
+import React from 'react';
+import { FieldMetaProps, FieldInputProps, useField } from 'formik';
+import {
+  FormGroup as PBFormGroup,
+  Intent,
+  FormGroupProps as PBFormGroupProps,
+} from '@blueprintjs/core';
+
+export interface FormGroupProps extends PBFormGroupProps {
+  name: string;
+  children: React.ReactElement;
+}
+
+/**
+ * Transformes field props to form group.
+ * @param   {Omit<FormGroupProps, "children">} props
+ * @param   {FieldInputProps<any>} field
+ * @param   {FieldMetaProps<any>} meta
+ * @returns {PBFormGroupProps}
+ */
+const fieldToFormGroup = (
+  props: Omit<FormGroupProps, 'children'>,
+  field: FieldInputProps<any>,
+  meta: FieldMetaProps<any>
+): PBFormGroupProps => {
+  const showError = meta.touched && meta.error;
+
+  return {
+    intent: showError ? Intent.DANGER : Intent.NONE,
+    helperText: showError ? meta.error : '',
+    ...props,
+  };
+};
+
+/**
+ * Form group.
+ * @param   {FormGroupProps}
+ * @returns {React.JSX}
+ */
+export function FFormGroup({ children, ...props }: FormGroupProps): JSX.Element {
+  const [field, meta] = useField(props.name);
+
+  return (
+    <PBFormGroup
+      {...fieldToFormGroup(props, field, meta)}
+      children={children}
+    />
+  );
+}

src/components/Forms/FMoneyInputGroup.js

@@ -0,0 +1,36 @@
+import React from 'react';
+import { Intent } from '@blueprintjs/core';
+import { Field, getIn } from 'formik';
+import { CurrencyInput } from './MoneyInputGroup';
+
+const fieldToMoneyInputGroup = ({
+  field: { onBlur: onFieldBlur, ...field },
+  form: { setFieldValue, touched, errors },
+  onBlur,
+  ...props
+}) => {
+  const fieldError = getIn(errors, field.name);
+  const showError = getIn(touched, field.name) && !!fieldError;
+
+  return {
+    intent: showError ? Intent.DANGER : Intent.NONE,
+    onBlurValue:
+      onBlur ??
+      function (e) {
+        onFieldBlur(e ?? field.name);
+      },
+    ...field,
+    onChange: (value) => {
+      setFieldValue(field.name, value);
+    },
+    ...props,
+  };
+};
+
+function FieldToMoneyInputGroup({ ...props }) {
+  return <CurrencyInput {...fieldToMoneyInputGroup(props)} />;
+}
+
+export function FMoneyInputGroup({ ...props }) {
+  return <Field {...props} component={FieldToMoneyInputGroup} />;
+}

src/components/Forms/index.js

@@ -1,2 +1,4 @@
 export * from './FormObserver';
-export * from './FormikObserver';
+export * from './FormikObserver';
+export * from './FMoneyInputGroup'
+export * from './FFormGroup'

src/components/index.js

@@ -98,7 +98,7 @@ export * from './FinancialStatement';
 export * from './FinancialReport';
 export * from './FinancialSheet';
 export * from './FeatureGuard';
-
+export * from './ExchangeRate'
 const Hint = FieldHint;
 
 const T = FormattedMessage;