Implement user login and registration; update database connection management to be per use not a singleton by adjusting service lifetimes in DI.

WebServer/Components/Pages/Home.razor

@@ -3,25 +3,43 @@
 
 <PageTitle>Home</PageTitle>
 
-<div class="card-holder">
-    <a class="card">
-        HOME
-    </a>
-    <a class="card">
-        S&P Chart
-    </a>
-    <a class="card">
-        Connect
-    </a>
-    <a class="card">
-        About
-    </a>
+<div class="main-area">
+
+    <!-- Login Frame -->
+    @if (Session == null){
+        <div class="gridFrame">
+            <div><h2>LOGIN</h2></div>
+            <div class="loginRow">
+                <div><span>username</span></div>
+                <input @bind-value="userName" type="text" />
+            </div>
+            <div class="loginRow">
+                <div><span>password</span></div>
+                <input @bind-value="passWord" type="password" />
+            </div>
+            <div class="loginRow">
+                <button @onclick="LoginSession">Login</button>
+                <button @onclick="registerSession">Register</button>
+            </div>
+            <div>
+                <span style="color: red;">@loginError</span>
+            </div>
         </div>
 
-<div class="main-area">
+    <!-- User Frame -->
+    }else{
+        <div class="gridFrame">
+            <span>UserName: @Session.UserName</span><br />
+        </div>
+    }
+    
+    <!-- AI Frame -->
+    <div class="gridFrame">
+        <div>
             <button @onclick="pullandtrain">@button1Text</button>
             <button @onclick="predict">@button2Text</button>
-
+        </div>
+        <div>
             @foreach (stockPredictionPair cur in predictions){
                 <div>
                     <h1>Symbol: @cur.Symbol</h1><br />
@@ -34,15 +52,21 @@
                 }
                 </div>
             }
+        </div>
+    </div>
 
 </div>
 
 
 @code {
 
-    string button1Text = "Train AI";
-    string button2Text = "Predict AI";
+    // User Stuff
+    loginSession? Session = null;
 
+    // Login Stuff
+    string userName = "";
+    string passWord = "";
+    string loginError = "";
 
     List<stockPredictionPair> predictions = new List<stockPredictionPair>(){
       new stockPredictionPair(){ Symbol = "AAPL" },
@@ -51,6 +75,36 @@
       new stockPredictionPair(){ Symbol = "FUN" }
     };
 
+    async Task LoginSession(){
+        string dbPrefix = $"[{userName.ToLower()}]:";                   // Set the DB prefix for the get and set
+        string passwordhash = dbDriver.Get( dbPrefix + "password" );    // Pull the password hash
+        if (BCrypt.Verify( passWord, passwordhash )){                   // If the password is valid
+            Session = new loginSession(){
+                UserName = userName.ToLower()
+            };
+        }else{
+            loginError = "wrong password";
+        }
+    }
+
+    async Task registerSession(){
+        string dbPrefix = $"[{userName.ToLower()}]:";
+        string passwordhash = dbDriver.Get( dbPrefix + "password" );
+        if (string.IsNullOrEmpty(passwordhash)){
+            dbDriver.Set( dbPrefix + "password", BCrypt.HashPassword( passWord, BCrypt.GenerateSalt() ) );
+            Session = new loginSession(){
+                UserName = userName.ToLower()
+            };
+        }else{
+            loginError = "account is taken";
+        }
+    }
+
+    // AI Stuff
+
+    string button1Text = "Train AI";
+    string button2Text = "Predict AI";
+
     async Task pullandtrain(){
         button1Text = "Do not refresh the page. The data is refreshing.";
         await Task.Delay(1);
@@ -76,9 +130,15 @@
         await Task.Delay(1);
     }
 
+    // Data Types
+
     class stockPredictionPair {
-        public string Symbol = "";
-        public int Movement = 0;
+        public string Symbol { get; set; }  = "";
+        public int Movement { get; set; } = 0;
+    }
+
+    class loginSession {
+        public string UserName { get; set; } = "";
     }
 
 }

WebServer/Components/Pages/Home.razor.css

@@ -1,25 +1,62 @@
-.card-holder {
-    display: flex;
-    float: left;
-    flex-direction: column;
-    background-color: red;
-    width: 300px;
-    height: calc(100vh - 3.5rem);
-}
-
-.card {
-    background-color: blue;
-    margin: 5px;
-    height: 45px;
-    color: white;
-    align-items: center;
-    display: flex;
-    justify-content: center;
-}
-
 .main-area {
-    float: left;
-    background-color: aqua;
-    height: calc(100vh - 3.5rem);
-    width: calc(100vw - 300px);
+    display: grid;
+    gap: 20px;
+    padding: 20px;
+    grid-auto-columns: auto;
+    grid-auto-flow: column;
+    grid-template-columns: max-content;
+    overflow: scroll;
+}
+
+.gridFrame {
+    background: #eee;
+    border-radius: 12px;
+    padding: 1.5rem;
+    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+    transition: 0.5s ease-in-out;
+    height: fit-content;
+    display: grid;
+    grid-row-gap: 10px;
+    border: 1px solid black;
+}
+
+.gridFrame h2 {
+    text-align: center;
+    margin: 0;
+    padding: 0;
+    border: 0;
+}
+
+.gridFrame:hover {
+    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4);
+}
+
+.loginRow {
+    width: 300px;
+    height: 40px;
+    padding-bottom: 10px;
+}
+
+.loginRow input {
+    width: calc(100% - 6px);
+    border: 1px solid black;
+    padding: 1px 2px;
+}
+
+    .loginRow input:focus {
+        border-color: brown;
+    }
+
+.loginRow button {
+    width: calc(50% - 15px);
+    background-color: darkblue;
+    border: 0;
+    margin: 0;
+    padding: 0;
+    color: white;
+    height: 30px;
+}
+
+.loginRow button:last-of-type{
+    float: right;
 }

WebServer/Components/_Imports.razor

@@ -10,6 +10,7 @@
 @using PythonInterop
 @using WebServer
 @using WebServer.Components
+@using BCrypt.Net;
 
 @inject DbDriver dbDriver
 @inject AIModule aiModule

WebServer/Controllers/Database.cs

@@ -2,18 +2,19 @@ using Microsoft.Data.Sqlite;
 
 namespace DataBase {
     
-    public class DbDriver : IDisposable {
+    public class DbDriver {
         
-        static SqliteConnection? singletonConnector = null;
+        static bool Initilized = false;
 
         public DbDriver() {
             // Load in the datastore if not already loaded
-            if (singletonConnector == null) {
-                singletonConnector = new SqliteConnection("Data Source=test.db");
-                singletonConnector.Open();
-
+            if (!Initilized) {
+                // Open a connection with auto dispose when done
+                using (SqliteConnection sqlite = new SqliteConnection("Data Source=test.db")) {
+                    // Open the connection
+                    sqlite.Open();
                     // Create the key value store if not exist
-                using var command = singletonConnector.CreateCommand();
+                    using var command = sqlite.CreateCommand();
                     command.CommandText = """
                         CREATE TABLE IF NOT EXISTS KeyValuePair (
                             key TEXT NOT NULL,
@@ -21,33 +22,47 @@ namespace DataBase {
                             PRIMARY KEY(key)
                         );
                     """;
+                    // Run the command
                     command.ExecuteReader();
                 }
             }
+        }
 
         // Return Values from keys
         public string Get(string Key) {
-            if (singletonConnector != null) {
-                using var command = singletonConnector.CreateCommand();
+            // Open a connection with auto dispose when done
+            using (SqliteConnection sqlite = new SqliteConnection("Data Source=test.db")) {
+                // Open the connection
+                sqlite.Open();
+                // Create the key value store if not exist
+                using var command = sqlite.CreateCommand();
                 command.CommandText = """
                     SELECT value
                     FROM KeyValuePair
                     Where key = $key;
                 """;
+                // Add the parameter to prevent sql injection
                 command.Parameters.AddWithValue("$key", Key);
-                command.ExecuteReader();
+                // Run the command
                 using var reader = command.ExecuteReader();
+                // Read off the result if exists
                 if (reader.Read()) {
+                    // Return the results
                     return reader.GetString(0);
                 }
-            }
+                // Return something if nothing existed
                 return "";
             }
+        }
 
         // Set a key value pair in the store
         public void Set(string Key, string Value) {
-            if (singletonConnector != null) {
-                using var command = singletonConnector.CreateCommand();
+            // Open a connection with auto dispose when done
+            using (SqliteConnection sqlite = new SqliteConnection("Data Source=test.db")) {
+                // Open the connection
+                sqlite.Open();
+                // Create the key value store if not exist
+                using var command = sqlite.CreateCommand();
                 command.CommandText = """
                     INSERT INTO KeyValuePair
                     (key,value)
@@ -57,24 +72,14 @@ namespace DataBase {
                     DO UPDATE
                     SET value = excluded.value;
                 """;
+                // Add the parameters to prevent sql injection
                 command.Parameters.AddWithValue("$key", Key);
                 command.Parameters.AddWithValue("$value", Value);
+                // Process the command
                 command.ExecuteReader();
             }
         }
 
-        // Deconstructor
-        ~DbDriver() {
-            Dispose();
-        }
-
-        // Deconstructor
-        public void Dispose() {
-            if (singletonConnector != null) {
-                singletonConnector.Close();
-                singletonConnector = null;
-            }
-        }
     }
 
 }

WebServer/Program.cs

@@ -19,7 +19,7 @@ if (args.Contains("Pull-Stock-Data")) {
     builder.Services.AddRazorComponents().AddInteractiveServerComponents();
 
     // Insert the DB driver for Dependency Injection
-    builder.Services.AddSingleton<DbDriver>();
+    builder.Services.AddScoped<DbDriver>();
 
     // Insert the python modlue for Dependency Injection
     builder.Services.AddSingleton(interopModule);

WebServer/WebServer.csproj

@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="BCrypt.Net-Next" Version="4.1.0" />
     <PackageReference Include="Microsoft.Data.Sqlite" Version="10.0.3" />
     <PackageReference Include="pythonnet" Version="3.0.5" />
   </ItemGroup>