fourth

@@ -12,29 +12,59 @@ app.listen(8080, function () {
 })
 
 let items=[];
+let count = 0;
 
 app.get('/', function(req, res){
     res.send(items);
-});
+}); // 조회하는 RESTful API
 app.post('/post', function(req, res){
-    let item = req.body;
-    console.log(item.id);
-    console.log(item.text);
+    let item = { id: count , text: req.body};
+    count = count + 1;
     
-    if(item != ""){ items.push(item); }
-    console.log("items: ", items);
-
-    res.send(items);
+    console.log(item);
     
-});
+    if(item != ""){
+        items.push(item); 
+        console.log("items: ", items);
+        res.send(items);
+    } else {
+        res.status(400);
+    }
+}); // 할 일을 생성하는 RESTfulAPI
+app.put('/put/:id', function(req, res){
+    let id = req.params.id;
+    console.log(id);
+    let iter_ = 0;
+
+    items.forEach((elem, index)=>{
+        if(elem.id == id){ 
+            items[index].text = req.body.text;
+            iter_ = iter_ + 1;
+            const bool_ = true;
+        }
+    });
+    if(bool_ == true){
+        res.status(400);
+    } else {
+        res.send(items);
+    }
+}); // todo에 적힌 내용을 수정하는 RESTfulAPI
+
 app.delete('/item/:id', function(req, res){
     let id = req.params.id;
     console.log(id);
+    let count = 0;
 
     items.forEach((elem, index)=>{
-        if(elem.id == id){ items.splice(index, 1); }
+        if(elem.id == id){ 
+            items.splice(index, 1);
+            count = count + 1;
+        }
     });
-    console.log(items);
 
-    res.send(items);
-});
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+    if(count == 0){
+        res.status(400);
+    } else {
+        res.send(items);
+    }
+}); // todo를 삭제하는 RESTfulAPI
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