basic conflict detection based on the audit log

src/app.py

@@ -13,6 +13,7 @@ from notes_move_api import notes_move_api
 from password_api import password_api
 from settings_api import settings_api
 from notes_history_api import notes_history_api
+from audit_api import audit_api
 import config_provider
 import my_scrypt
 
@@ -35,6 +36,7 @@ app.register_blueprint(notes_move_api)
 app.register_blueprint(password_api)
 app.register_blueprint(settings_api)
 app.register_blueprint(notes_history_api)
+app.register_blueprint(audit_api)
 
 class User(UserMixin):
     pass

src/audit_api.py

@@ -0,0 +1,18 @@
+from flask import Blueprint, jsonify
+from flask import request
+from flask_login import login_required
+
+from sql import getSingleResult
+
+audit_api = Blueprint('audit_api', __name__)
+
+@audit_api.route('/audit/<int:full_load_time>', methods = ['GET'])
+@login_required
+def getNote(full_load_time):
+    browser_id = request.headers['x-browser-id']
+
+    count = getSingleResult("SELECT COUNT(*) AS 'count' FROM audit_log WHERE browser_id != ? AND date_modified >= ?", [browser_id, full_load_time])['count']
+
+    return jsonify({
+        'changed': count > 0
+    })

src/tree_api.py

@@ -1,5 +1,7 @@
 import base64
 import os
+import math
+import time
 
 from flask import Blueprint, jsonify
 from flask_login import login_required
@@ -48,5 +50,6 @@ def getTree():
     retObject['encrypted_data_key'] = getOption('encrypted_data_key')
     retObject['encryption_session_timeout'] = getOption('encryption_session_timeout')
     retObject['browser_id'] = base64.b64encode(os.urandom(8))
+    retObject['full_load_time'] = math.floor(time.time())
 
     return jsonify(retObject)

static/js/tree.js

@@ -86,6 +86,15 @@ function setExpandedToServer(note_id, is_expanded) {
 let globalEncryptionSalt;
 let globalEncryptionSessionTimeout;
 let globalEncryptedDataKey;
+let globalFullLoadTime;
+
+setInterval(() => {
+    $.get(baseUrl + 'audit/' + globalFullLoadTime).then(resp => {
+        if (resp.changed) {
+            window.location.reload(true);
+        }
+    });
+}, 60 * 1000);
 
 $(function(){
     $.get(baseUrl + 'tree').then(resp => {
@@ -94,6 +103,7 @@ $(function(){
         globalEncryptionSalt = resp.password_derived_key_salt;
         globalEncryptionSessionTimeout = resp.encryption_session_timeout;
         globalEncryptedDataKey = resp.encrypted_data_key;
+        globalFullLoadTime = resp.full_load_time;
 
         // add browser ID header to all AJAX requests
         $.ajaxSetup({