From cf4918e901da8f2c388eebd33a500bf737943685 Mon Sep 17 00:00:00 2001
From: MrArmonius <mrarmonius@gmail.com>
Date: Mon, 26 Jul 2021 16:54:51 +0200
Subject: [PATCH] Add MessageID for asynchronous request

ID is stored in the session with the type `uint32`

Correction javascript

For the `for loop`, we need don't forget than know we have in format
`JSON` the response: `search:{..}, id:0`
For the id, don't forget to change the global value of `JS`.
---
 directory.go                | 38 ++++++++++++++++++++++++++++++-------
 main.go                     |  3 +++
 static/javascript/search.js | 33 ++++++++++++++++++--------------
 3 files changed, 53 insertions(+), 21 deletions(-)

diff --git a/directory.go b/directory.go
index 2be0a8b..6a7ade2 100644
--- a/directory.go
+++ b/directory.go
@@ -28,7 +28,10 @@ type SearchResult struct {
 	DN          string `json:"dn"`
 }
 
-type Results []SearchResult
+type Results struct {
+	Search    []SearchResult `json:"search"`
+	MessageID uint32         `json:"id"`
+}
 
 func handleSearch(w http.ResponseWriter, r *http.Request) {
 	//Get input value by user
@@ -39,6 +42,11 @@ func handleSearch(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	session, err := store.Get(r, SESSION_NAME)
+	if err != nil {
+		return
+	}
+
 	//Search value with ldap and filter
 	searchRequest := ldap.NewSearchRequest(
 		config.UserBaseDN,
@@ -58,16 +66,32 @@ func handleSearch(w http.ResponseWriter, r *http.Request) {
 	for _, values := range sr.Entries {
 
 		if strings.Contains(values.GetAttributeValue("cn"), input) {
-			result = append(result, SearchResult{
-				Identifiant: values.GetAttributeValue("cn"),
-				Name:        values.GetAttributeValue("displayname"),
-				Email:       values.GetAttributeValue("email"),
-				DN:          values.DN,
-			})
+			result = Results{
+				Search: append(result.Search, SearchResult{
+					Identifiant: values.GetAttributeValue("cn"),
+					Name:        values.GetAttributeValue("displayname"),
+					Email:       values.GetAttributeValue("email"),
+					DN:          values.DN,
+				}),
+			}
 		}
 
 	}
 
+	//Convert interface to uint32 with Type Assertions and not a simple convert
+	if val_Raw, ok_raw := session.Values["MessageID"]; ok_raw {
+		if val, ok := val_Raw.(uint32); ok {
+			val += 1
+			session.Values["MessageID"] = val
+			result.MessageID = val
+			err = session.Save(r, w)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+		}
+	}
+
 	//Send JSON through xhttp
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
 	w.WriteHeader(http.StatusCreated)
diff --git a/main.go b/main.go
index 6059d04..da75ce0 100644
--- a/main.go
+++ b/main.go
@@ -392,6 +392,9 @@ func handleLogin(w http.ResponseWriter, r *http.Request) *LoginInfo {
 		session.Values["login_password"] = password
 		session.Values["login_dn"] = user_dn
 
+		//Add Value MessageID
+		session.Values["MessageID"] = uint32(0)
+
 		err = session.Save(r, w)
 		if err != nil {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
diff --git a/static/javascript/search.js b/static/javascript/search.js
index b82b232..7675c0e 100644
--- a/static/javascript/search.js
+++ b/static/javascript/search.js
@@ -1,3 +1,5 @@
+var perso_id = 0;
+
 function searchDirectory() {
     var input = document.getElementById("search").value;
     if(input){
@@ -8,23 +10,26 @@ function searchDirectory() {
             //Response from Request Ajax
             var jsonResponse = JSON.parse(xhttp.responseText);
 
-            //We get the old table element, we create an new table element then we increment this new table.
-            //After the new add, we replace the old table by the new one.
-            var old_table = document.getElementById("users");
-            var table = document.createElement('tbody');
-            table.setAttribute("id","users");
+            if (perso_id < jsonResponse.id) {
+                perso_id = jsonResponse.id
+                //We get the old table element, we create an new table element then we increment this new table.
+                //After the new add, we replace the old table by the new one.
+                var old_table = document.getElementById("users");
+                var table = document.createElement('tbody');
+                table.setAttribute("id","users");
             
-            for (let i =0; i < Object.keys(jsonResponse).length; i++) {
-                var row = table.insertRow(0);
-                var identifiant = row.insertCell(0);
-                var name = row.insertCell(1);
-                var email = row.insertCell(2);
-                identifiant.innerHTML = `<a href="/admin/ldap/${jsonResponse[i].dn}">${jsonResponse[i].identifiant}</a>`
-                name.innerHTML = jsonResponse[i].name
-                email.innerHTML = jsonResponse[i].email
+                for (let i =0; i < Object.keys(jsonResponse.search).length; i++) {
+                    var row = table.insertRow(0);
+                    var identifiant = row.insertCell(0);
+                    var name = row.insertCell(1);
+                    var email = row.insertCell(2);
+                    identifiant.innerHTML = `<a href="/admin/ldap/${jsonResponse.search[i].dn}">${jsonResponse.search[i].identifiant}</a>`
+                    name.innerHTML = jsonResponse.search[i].name
+                    email.innerHTML = jsonResponse.search[i].email
 
+                }
+                old_table.parentNode.replaceChild(table, old_table)
             }
-            old_table.parentNode.replaceChild(table, old_table)
         }
         };
         xhttp.overrideMimeType("application/json");