sqlite database

Fluzm/Fluzm.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net7.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>disable</ImplicitUsings>
         <Nullable>enable</Nullable>
     </PropertyGroup>
@@ -11,6 +11,7 @@
       <PackageReference Include="DTLib.Ben.Demystifier" Version="1.0.4" />
       <PackageReference Include="DTLib.Dtsod" Version="1.3.0" />
       <PackageReference Include="DTLib.Logging" Version="1.3.0" />
+      <PackageReference Include="sqlite-net-pcl" Version="1.8.116" />
     </ItemGroup>
     
     <Target Name="PreBuild" AfterTargets="PreBuildEvent">

Fluzm/public/scripts/models/PostData.ts

@@ -5,7 +5,7 @@ export interface PostData {
     textFragment: string
     rating: number
     imageUrl: string
-    commentIds: string[]
+    commentIds: number[]
 }
 
 export default PostData

Fluzm/src/DTO/ChannelData.cs

@@ -0,0 +1,14 @@
+using SQLite;
+
+namespace Fluzm.DTO;
+
+#nullable disable
+public class ChannelData
+{
+    [PrimaryKey, AutoIncrement]
+    public int channelId  { get; set; }
+    public string channelName { get; set; }
+    public string avatarUrl { get; set; }
+    public int followersCount { get; set; }
+    public float rating { get; set; }
+}

Fluzm/src/DTO/PostData.cs

@@ -0,0 +1,21 @@
+using System.Linq;
+using SQLite;
+
+namespace Fluzm.DTO;
+
+#nullable disable
+public class PostData 
+{
+    [PrimaryKey, AutoIncrement]
+    public int postId { get; set; }
+    public int channelId { get; set; }
+    public string title { get; set; }
+    public string textFragment { get; set; }
+    public float rating { get; set; }
+    public string imageUrl { get; set; }
+    [Column("commentIds")]
+    public string _commentIdsRaw { get; set; }
+
+    [Ignore]
+    public int[] commentIds => _commentIdsRaw.Split(',').Select(s => Convert.ToInt32(s)).ToArray();
+}

Fluzm/src/DTO/UserData.cs

@@ -0,0 +1,11 @@
+using SQLite;
+
+namespace Fluzm.DTO;
+
+#nullable disable
+public class UserData
+{
+    [PrimaryKey, AutoIncrement]
+    public int id { get; set; }
+    public string name { get; set; }
+}

Fluzm/src/Database.cs

@@ -0,0 +1,34 @@
+using System.Collections.Concurrent;
+using Fluzm.DTO;
+using SQLite;
+
+namespace Fluzm;
+
+public class DatabaseConnection
+{
+    private static readonly IOPath db_path = "database.sqlite3";
+    private SQLiteConnection _db;
+    private IdGenerator _idGenerator;
+    
+    public DatabaseConnection()
+    {
+        _db = new SQLiteConnection(db_path.Str);
+        _db.CreateTable<UserData>();
+        _db.CreateTable<ChannelData>();
+        _db.CreateTable<PostData>();
+        
+        _idGenerator = new IdGenerator(new Dictionary<Type, int>
+        {
+            { typeof(UserData), _db.Table<UserData>().Count() },
+            { typeof(ChannelData), _db.Table<ChannelData>().Count() },
+            { typeof(PostData), _db.Table<PostData>().Count() },
+        });
+    }
+    
+    public UserData GetUserData(int id) => _db.Table<UserData>().First(u => u.id == id);
+    
+    public ChannelData GetChannel(int id) => _db.Table<ChannelData>().First(c => c.channelId == id);
+    
+    public PostData GetPostData(int id) => _db.Table<PostData>().First(p => p.postId == id);
+
+}

Fluzm/src/IdGenerator.cs

@@ -0,0 +1,22 @@
+namespace Fluzm;
+
+public class IdGenerator
+{
+    private Dictionary<Type, int> _last_ids;
+
+    public IdGenerator(IDictionary<Type, int> initial_values)
+    {
+        _last_ids = new Dictionary<Type, int>(initial_values);
+    }
+    
+    // returns id unique for type
+    public int GenerateId<T>()
+    {
+        lock (_last_ids)
+        {
+            int new_id = _last_ids[typeof(T)]+1;
+            _last_ids[typeof(T)] = new_id;
+            return new_id;
+        }
+    }
+}

Fluzm/src/Program.cs

@@ -22,6 +22,7 @@ internal static class Program
     {
         try
         {
+            // CLI
             Console.InputEncoding = Encoding.UTF8;
             Console.OutputEncoding = Encoding.UTF8;
             Console.CancelKeyPress += (_, _) =>
@@ -30,16 +31,22 @@ internal static class Program
                 mainCancel.Cancel();
             };
 
+            // config
             Config config;
             if (!File.Exists(configPath))
             {
-                logger.LogWarn("Main", "Config file not found.");
+                logger.LogWarn("Main", "config file not found.");
                 config = new Config();
                 File.WriteAllText(configPath, config.ToString());
-                logger.LogWarn("Main", $"Created default at {configPath}.");
+                logger.LogWarn("Main", $"created default at {configPath}.");
             }
             else config = Config.FromDtsod(new DtsodV23(File.ReadAllText(configPath)));
             
+            // database
+            var db = new DatabaseConnection();
+            
+            
+            // http server
             string baseUrl = $"http://{config.Address}:{config.Port}/";
             logger.LogInfo("Main", $"starting webserver at {baseUrl} ...");
             var server = new HttpListener();
@@ -57,6 +64,7 @@ internal static class Program
                 requestId++;
             }
             
+            // stop
             server.Stop();
             logger.LogInfo("Main", "server stopped");
         }