add memory

Services/Memory/DatabaseInitializer.cs

@@ -0,0 +1,65 @@
+using Microsoft.Data.Sqlite;
+
+namespace TentacleBot.Services.Memory;
+
+public class DatabaseInitializer
+{
+    private readonly string _connectionString;
+
+    public DatabaseInitializer(string dbPath)
+    {
+        var directory = Path.GetDirectoryName(dbPath);
+        if (!string.IsNullOrWhiteSpace(directory) && !Directory.Exists(directory))
+        {
+            Directory.CreateDirectory(directory);
+        }
+
+        _connectionString = $"Data Source={dbPath}";
+    }
+
+    public string ConnectionString => _connectionString;
+
+    public void Initialize()
+    {
+        using var connection = new SqliteConnection(_connectionString);
+        connection.Open();
+
+        using var cmd = connection.CreateCommand();
+        cmd.CommandText = @"
+            CREATE TABLE IF NOT EXISTS user_rules (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                user_id TEXT NOT NULL,
+                rule_text TEXT NOT NULL,
+                created_at TEXT NOT NULL DEFAULT (datetime('now'))
+            );
+
+            CREATE TABLE IF NOT EXISTS memories (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                user_id TEXT NOT NULL,
+                content TEXT NOT NULL,
+                category TEXT,
+                importance INTEGER NOT NULL DEFAULT 5,
+                created_at TEXT NOT NULL DEFAULT (datetime('now')),
+                last_accessed TEXT
+            );
+
+            CREATE VIRTUAL TABLE IF NOT EXISTS memories_fts USING fts5(
+                content, content=memories, content_rowid=id
+            );
+
+            CREATE TRIGGER IF NOT EXISTS memories_ai AFTER INSERT ON memories BEGIN
+                INSERT INTO memories_fts(rowid, content) VALUES (new.id, new.content);
+            END;
+
+            CREATE TRIGGER IF NOT EXISTS memories_ad AFTER DELETE ON memories BEGIN
+                INSERT INTO memories_fts(memories_fts, rowid, content) VALUES ('delete', old.id, old.content);
+            END;
+
+            CREATE TRIGGER IF NOT EXISTS memories_au AFTER UPDATE ON memories BEGIN
+                INSERT INTO memories_fts(memories_fts, rowid, content) VALUES ('delete', old.id, old.content);
+                INSERT INTO memories_fts(rowid, content) VALUES (new.id, new.content);
+            END;
+        ";
+        cmd.ExecuteNonQuery();
+    }
+}