Create search function

- 검색 기능을 추가하였습니다

@@ -12,11 +12,12 @@ router.get('/', async function(req, res){
     var limit = Math.max(1, parseInt(req.query.limit)); 
     page = !isNaN(page)?page:1;                         
     limit = !isNaN(limit)?limit:10;                     
-  
+
+    var searchQuery = createSearchQuery(req.query);
     var skip = (page-1)*limit; 
-    var count = await Post.countDocuments({}); 
+    var count = await Post.countDocuments(searchQuery); 
     var maxPage = Math.ceil(count/limit); 
-    var posts = await Post.find({}) 
+    var posts = await Post.find(searchQuery) 
       .populate('author')
       .sort('-createdAt')
       .skip(skip)  
@@ -27,7 +28,9 @@ router.get('/', async function(req, res){
       posts:posts,
       currentPage:page, 
       maxPage:maxPage,  
-      limit:limit       
+      limit:limit,
+      searchType:req.query.searchType,
+      searchText:req.query.searchText
     });
 });
 
@@ -112,5 +115,23 @@ function checkPermission(req, res, next){
     });
 }
 
+
+// Search function
+function createSearchQuery(queries){
+    var searchQuery = {};
+    if(queries.searchType && queries.searchText && queries.searchText.length >= 3){
+      var searchTypes = queries.searchType.toLowerCase().split(',');
+      var postQueries = [];
+      if(searchTypes.indexOf('title')>=0){
+        postQueries.push({ title: { $regex: new RegExp(queries.searchText, 'i') } });
+      }
+      if(searchTypes.indexOf('body')>=0){
+        postQueries.push({ body: { $regex: new RegExp(queries.searchText, 'i') } });
+      }
+      if(postQueries.length > 0) searchQuery = {$or:postQueries};
+    }
+    return searchQuery;
+}
+
 // Export module
 module.exports = router;
\ No newline at end of file

@@ -33,6 +33,26 @@ util.noPermission = function(req, res){
   res.redirect('/login');
 }
 
+// 검색 기능 추가
+util.getPostQueryString = function(req, res, next){
+  res.locals.getPostQueryString = function(isAppended=false, overwrites={}){    
+    var queryString = '';
+    var queryArray = [];
+    var page = overwrites.page?overwrites.page:(req.query.page?req.query.page:'');
+    var limit = overwrites.limit?overwrites.limit:(req.query.limit?req.query.limit:'');
+    var searchType = overwrites.searchType?overwrites.searchType:(req.query.searchType?req.query.searchType:'');
+    var searchText = overwrites.searchText?overwrites.searchText:(req.query.searchText?req.query.searchText:'');
 
+    if(page) queryArray.push('page='+page);
+    if(limit) queryArray.push('limit='+limit);
+    if(searchType) queryArray.push('searchType='+searchType);
+    if(searchText) queryArray.push('searchText='+searchText);
+
+    if(queryArray.length>0) queryString = (isAppended?'&':'?') + queryArray.join('&');
+
+    return queryString;
+  }
+  next();
+}
 
 module.exports = util;
\ No newline at end of file

@@ -71,6 +71,24 @@
             </li>
           </ul>
         </nav>
+
+        
+      <form action="/posts" method="get" style="float:right">
+        <div class="form-row">
+          <div class="form-group">
+            <div class="input-group">
+              <select name="searchType" class="custom-select">
+                <option value="title" <%= searchType=='title'?'selected':'' %>>Title</option>
+              </select>
+              <input minLength="3" type="text" name="searchText" value="<%= searchText %>">
+              <div class="input-group-append">
+                <button class="btn btn-outline-primary" type="submit">Search</button>
+              </div>
+            </div>
+          </div>
+        </div>
+      </form>
+
       </div>
     </div>
   </body>