From da52a78dbcb91ad232d9b54a8fd0a784269bb7be Mon Sep 17 00:00:00 2001
From: zoonyoung <9851248@gmail.com>
Date: Sun, 28 Apr 2024 18:28:42 +0900
Subject: [PATCH] =?UTF-8?q?Feat:=20Search=EC=97=90=20autoSuggestion?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EC=83=9D=EC=84=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../common/Header/SearchBox.module.scss       | 32 +++++++
 src/components/common/Header/SearchBox.tsx    | 90 +++++++++++++++++--
 tsconfig.json                                 |  1 +
 3 files changed, 115 insertions(+), 8 deletions(-)

diff --git a/src/components/common/Header/SearchBox.module.scss b/src/components/common/Header/SearchBox.module.scss
index 4a0cbaa..2dbc8aa 100644
--- a/src/components/common/Header/SearchBox.module.scss
+++ b/src/components/common/Header/SearchBox.module.scss
@@ -40,3 +40,35 @@
     width: 100%;
   }
 }
+
+.itemBox {
+  position: absolute;
+  display: flex;
+  flex-direction: column;
+  top: 5rem;
+  left: 0;
+  z-index: 1;
+  width: 100%;
+  overflow: hidden;
+  background: $white;
+  border: 2px solid $red-200;
+
+  @include rounded-lg;
+}
+
+.item {
+  padding: 0.6rem 1.5rem;
+  font-size: 1.6rem;
+  border: none;
+  background: none;
+  cursor: pointer;
+  border: 1px solid $red-600;
+
+  span {
+    @include font-bold;
+  }
+
+  &:hover {
+    background: $red-600;
+  }
+}
diff --git a/src/components/common/Header/SearchBox.tsx b/src/components/common/Header/SearchBox.tsx
index 2e353ed..05f3167 100644
--- a/src/components/common/Header/SearchBox.tsx
+++ b/src/components/common/Header/SearchBox.tsx
@@ -1,32 +1,106 @@
 'use client';
 
 import { useRouter } from 'next/navigation';
-import { useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import Image from 'next/image';
 import { SEARCH_ICON } from '@/utils/constants';
+import BASE_URL from '@/constants/BASEURL';
+import useOutsideClick from '@/hooks/useOutsideClick';
 import styles from './SearchBox.module.scss';
 
 export default function SearchBox() {
   const router = useRouter();
-  const [input, setInput] = useState('');
+  const [keyword, setKeyword] = useState('');
+  const [showAutoSuggestion, setShowAutoSuggestion] = useState(false);
+  const [suggestionList, setSuggestionList] = useState([]);
+  const autoSuggestionRef = useRef(null);
+  const inputRef = useRef(null);
+  useOutsideClick(autoSuggestionRef, () => setShowAutoSuggestion(false));
+
+  const handleSuggestionClick = (event) => {
+    setKeyword(event.target.id);
+    inputRef.current.focus();
+    setShowAutoSuggestion(false);
+  };
+
   const handleInputChange = (event: React.ChangeEvent<HTMLInputElement>) => {
-    setInput(event.target.value);
+    setKeyword(event.target.value);
   };
   const handleKeyDown = (event: React.KeyboardEvent<HTMLInputElement>) => {
-    if (event.key === 'Enter' && input) {
-      router.push(`/?keyword=${input}`);
+    if (event.key === 'Enter' && keyword) {
+      router.push(`/?keyword=${keyword}`);
     }
   };
+
+  useEffect(() => {
+    let debounce;
+    if (keyword) {
+      debounce = setTimeout(async () => {
+        try {
+          const response = await fetch(
+            `${BASE_URL}/notices?limit=10&keyword=${encodeURIComponent(keyword.trim())}&sort=time`,
+          );
+          if (!response.ok) {
+            throw new Error('Network response was not ok');
+          }
+          const searchSet = new Set<string[]>();
+          const data = await response.json();
+          data.items.filter((item) => searchSet.add(item.item.shop.item.name));
+          setSuggestionList([...searchSet]);
+        } catch (error) {
+          console.error('There was a problem with your fetch operation:', error);
+        }
+      }, 200);
+    } else {
+      setSuggestionList([]);
+    }
+
+    return () => {
+      clearTimeout(debounce);
+    };
+  }, [keyword]);
+
   return (
-    <form className={styles.searchBarWrapper} onSubmit={(e) => e.preventDefault()}>
-      <Image src={SEARCH_ICON} alt="search" width={20} height={20} className={styles.searchButton} priority />
+    <form className={styles.searchBarWrapper} onSubmit={(e) => e.preventDefault()} ref={autoSuggestionRef}>
+      <Image src={SEARCH_ICON} alt="search" width={21} height={20} className={styles.searchButton} priority />
       <input
         className={styles.searchBar}
-        value={input}
+        value={keyword}
+        ref={inputRef}
+        onFocus={() => setShowAutoSuggestion(true)}
         onChange={handleInputChange}
         onKeyDown={handleKeyDown}
         placeholder="가게 이름으로 찾아보세요"
       />
+      {showAutoSuggestion && (
+        <div className={styles.itemBox}>
+          {suggestionList.map((data) => (
+            <button
+              type="button"
+              className={styles.item}
+              key={data}
+              id={data}
+              onClick={handleSuggestionClick}
+              aria-label={`${data}을(를) 선택하려면 클릭하세요.`}
+              dangerouslySetInnerHTML={{
+                __html: data.replace(
+                  new RegExp(`(${keyword.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')})`, 'gi'),
+                  '<strong>$1</strong>',
+                ),
+              }}
+            />
+
+            // <button type="button" className={styles.item} key={data} id={data} onClick={handleSuggestionClick}>
+            //   {data}
+            // </button>
+          ))}
+          {suggestionList.length === 0 && (
+            <button type="button" className={styles.item}>
+              검색된 결과가 없습니다.
+            </button>
+          )}
+        </div>
+      )}
     </form>
   );
 }
diff --git a/tsconfig.json b/tsconfig.json
index 683cb57..33cad90 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -12,6 +12,7 @@
     "isolatedModules": true,
     "jsx": "preserve",
     "incremental": true,
+    "downlevelIteration": true,
     "plugins": [
       {
         "name": "next"