[#521] TextArea 컴포넌트 (#522)

* feat: textarea 컴포넌트 구현

* wip: textarea 개선 작업 중

* refactor: Textarea 고도화

- InputLength, ErrorMessage 구조 수정
- 컴포넌트 파일명 대소문자 수정을 위한 더미커밋 포함

* chore: TextArea 파일명 변경

src/stories/base/TextArea.stories.tsx

@@ -0,0 +1,54 @@
+import { Meta, StoryObj } from '@storybook/react';
+import { SubmitHandler, useForm } from 'react-hook-form';
+import TextArea from '@/v1/base/TextArea';
+import Button from '@/v1/base/Button';
+
+const meta: Meta<typeof TextArea> = {
+  title: 'Base/TextArea',
+  component: TextArea,
+};
+
+export default meta;
+
+type Story = StoryObj<typeof TextArea>;
+
+export const Default: Story = {
+  args: { placeholder: '어떤 이야기를 모임에서 나누면 좋을까요?' },
+};
+
+type FormValue = {
+  content: string;
+};
+
+const TextAreaWithForm = () => {
+  const {
+    register,
+    handleSubmit,
+    formState: { errors },
+  } = useForm<FormValue>({ mode: 'all' });
+
+  const handleTextAreaSubmit: SubmitHandler<FormValue> = value => {
+    alert(value.content);
+  };
+
+  return (
+    <form onSubmit={handleSubmit(handleTextAreaSubmit)}>
+      <TextArea
+        {...register('content', {
+          maxLength: { value: 3, message: '최대 3자' },
+        })}
+        count={true}
+        error={!!errors.content}
+      >
+        <TextArea.Error>{errors.content?.message}</TextArea.Error>
+      </TextArea>
+      <Button type="submit" size="full">
+        submit
+      </Button>
+    </form>
+  );
+};
+
+export const UseWithForm: Story = {
+  render: () => <TextAreaWithForm />,
+};

src/v1/base/ErrorMessage.tsx

@@ -1,14 +1,18 @@
-import { IconWarningCircle } from '@public/icons';
 import { ReactNode } from 'react';
+import { IconWarningCircle } from '@public/icons';
 
-const ErrorMessage = ({ children }: { children: ReactNode }) => {
+const ErrorMessage = ({ children }: { children?: ReactNode }) => {
   return (
-    <div className="flex items-center gap-[0.4rem] text-xs text-warning-800">
-      <div className="h-[1.2rem] w-[1.2rem]">
-        <IconWarningCircle />
-      </div>
-      {children}
-    </div>
+    <>
+      {children && (
+        <div className="flex items-center gap-[0.4rem] text-xs text-warning-800">
+          <div className="h-[1.2rem] w-[1.2rem]">
+            <IconWarningCircle />
+          </div>
+          {children}
+        </div>
+      )}
+    </>
   );
 };
 

src/v1/base/InputLength.tsx

@@ -12,10 +12,10 @@ const InputLength = ({
   const textColor = isError ? 'text-warning-800 ' : 'text-main-900';
 
   return (
-    <div>
+    <p>
       <span className={textColor}>{currentLength ? currentLength : 0}</span>/
       {maxLength}
-    </div>
+    </p>
   );
 };
 

src/v1/base/TextArea.tsx

@@ -0,0 +1,100 @@
+import {
+  ChangeEventHandler,
+  ForwardedRef,
+  PropsWithChildren,
+  TextareaHTMLAttributes,
+  forwardRef,
+  useState,
+  ReactNode,
+  isValidElement,
+  Children,
+} from 'react';
+
+import ErrorMessage from './ErrorMessage';
+import InputLength from './InputLength';
+
+interface BaseTextAreaProps
+  extends TextareaHTMLAttributes<HTMLTextAreaElement> {
+  error?: boolean;
+}
+interface TextAreaProps extends BaseTextAreaProps {
+  count?: boolean;
+}
+
+const _TextArea = (
+  {
+    maxLength = 500,
+    count = false,
+    error = false,
+    onChange,
+    children,
+    ...props
+  }: PropsWithChildren<TextAreaProps>,
+  ref: ForwardedRef<HTMLTextAreaElement>
+) => {
+  const [value, setValue] = useState('');
+
+  const handleChange: ChangeEventHandler<HTMLTextAreaElement> = e => {
+    setValue(e.target.value);
+    onChange && onChange(e);
+  };
+
+  return (
+    <div>
+      <BaseTextArea
+        onChange={handleChange}
+        maxLength={maxLength}
+        error={error}
+        ref={ref}
+        {...props}
+      />
+      <div className="flex justify-between gap-[0.4rem]">
+        {/** 에러 메세지 */}
+        <div>{getErrorChildren(children)}</div>
+        {/** 글자수 카운트 */}
+        {count && (
+          <InputLength
+            currentLength={value.length}
+            isError={error}
+            maxLength={maxLength}
+          />
+        )}
+      </div>
+    </div>
+  );
+};
+
+const TextArea = Object.assign(forwardRef(_TextArea), {
+  Error: ErrorMessage,
+});
+
+const ErrorMeesageType = (<ErrorMessage />).type;
+
+const getErrorChildren = (children: ReactNode) => {
+  const childrenArray = Children.toArray(children);
+
+  return childrenArray.find(
+    child => isValidElement(child) && child.type === ErrorMeesageType
+  );
+};
+
+export default TextArea;
+
+const BaseTextArea = forwardRef<HTMLTextAreaElement, BaseTextAreaProps>(
+  ({ placeholder, error, ...props }, ref) => {
+    const borderColor = error
+      ? 'border-warning-800 focus:border-warning-800'
+      : 'border-black-400 focus:border-main-900';
+
+    return (
+      <textarea
+        className={`min-h-[8rem] w-full resize-none rounded-[0.5rem] border-[0.05rem] p-[1rem] text-sm outline-none placeholder:text-placeholder ${borderColor}`}
+        placeholder={placeholder || '내용을 입력해주세요'}
+        ref={ref}
+        {...props}
+      />
+    );
+  }
+);
+
+BaseTextArea.displayName = 'BaseTextArea';