Add project files.
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roman
+192
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using System;
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using System.Collections.Generic;
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using System.IO;
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using Microsoft.Data.Sqlite;
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namespace BoxPacker3D
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{
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/// <summary>
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/// Persistent template of an item that can be re-used across packing sessions.
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/// Stored in an on-disk SQLite database.
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/// </summary>
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public class ItemTemplate
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{
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public int Id { get; set; }
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public string Name { get; set; } = "";
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public double Width { get; set; }
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public double Height { get; set; }
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public double Depth { get; set; }
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public override string ToString() =>
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$"{Name} ({Width}×{Height}×{Depth} mm)";
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}
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/// <summary>
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/// Simple SQLite-backed repository for <see cref="ItemTemplate"/>s.
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/// Database schema is created on first use.
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/// </summary>
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public class ItemDatabase
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{
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private readonly string _connectionString;
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public ItemDatabase(string dbPath)
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{
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// Ensure directory exists
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var dir = Path.GetDirectoryName(dbPath);
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if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
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Directory.CreateDirectory(dir);
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_connectionString = new SqliteConnectionStringBuilder
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{
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DataSource = dbPath,
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Mode = SqliteOpenMode.ReadWriteCreate
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}.ToString();
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EnsureSchema();
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}
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private void EnsureSchema()
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{
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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cmd.CommandText = @"
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CREATE TABLE IF NOT EXISTS items (
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Id INTEGER PRIMARY KEY AUTOINCREMENT,
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Name TEXT NOT NULL UNIQUE COLLATE NOCASE,
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Width REAL NOT NULL,
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Height REAL NOT NULL,
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Depth REAL NOT NULL
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);";
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cmd.ExecuteNonQuery();
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}
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private SqliteConnection Open()
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{
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var conn = new SqliteConnection(_connectionString);
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conn.Open();
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return conn;
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}
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/// <summary>Returns all templates ordered alphabetically by name.</summary>
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public List<ItemTemplate> GetAll()
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{
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var list = new List<ItemTemplate>();
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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cmd.CommandText = "SELECT Id, Name, Width, Height, Depth FROM items ORDER BY Name COLLATE NOCASE;";
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using var rdr = cmd.ExecuteReader();
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while (rdr.Read())
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list.Add(new ItemTemplate
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{
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Id = rdr.GetInt32(0),
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Name = rdr.GetString(1),
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Width = rdr.GetDouble(2),
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Height = rdr.GetDouble(3),
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Depth = rdr.GetDouble(4)
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});
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return list;
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}
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/// <summary>Returns the template with the given name or null if none exists.</summary>
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public ItemTemplate? FindByName(string name)
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{
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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cmd.CommandText = "SELECT Id, Name, Width, Height, Depth FROM items WHERE Name = $n COLLATE NOCASE LIMIT 1;";
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cmd.Parameters.AddWithValue("$n", name);
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using var rdr = cmd.ExecuteReader();
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if (rdr.Read())
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return new ItemTemplate
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{
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Id = rdr.GetInt32(0),
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Name = rdr.GetString(1),
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Width = rdr.GetDouble(2),
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Height = rdr.GetDouble(3),
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Depth = rdr.GetDouble(4)
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};
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return null;
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}
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/// <summary>Inserts or replaces a template (upsert by Name).</summary>
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public void Upsert(ItemTemplate item)
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{
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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cmd.CommandText = @"
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INSERT INTO items (Name, Width, Height, Depth)
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VALUES ($n, $w, $h, $d)
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ON CONFLICT(Name) DO UPDATE SET
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Width = excluded.Width,
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Height = excluded.Height,
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Depth = excluded.Depth;";
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cmd.Parameters.AddWithValue("$n", item.Name);
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cmd.Parameters.AddWithValue("$w", item.Width);
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cmd.Parameters.AddWithValue("$h", item.Height);
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cmd.Parameters.AddWithValue("$d", item.Depth);
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cmd.ExecuteNonQuery();
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}
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public void DeleteByName(string name)
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{
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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cmd.CommandText = "DELETE FROM items WHERE Name = $n COLLATE NOCASE;";
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cmd.Parameters.AddWithValue("$n", name);
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cmd.ExecuteNonQuery();
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}
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/// <summary>
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/// Checks if a template with the same name or exact dimensions already exists.
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/// Returns the existing template if found, null otherwise.
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/// </summary>
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public ItemTemplate? FindDuplicate(ItemTemplate item)
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{
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using var conn = Open();
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using var cmd = conn.CreateCommand();
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// Check for same name (case-insensitive)
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cmd.CommandText = "SELECT Id, Name, Width, Height, Depth FROM items WHERE Name = $n COLLATE NOCASE LIMIT 1;";
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cmd.Parameters.AddWithValue("$n", item.Name);
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using (var rdr = cmd.ExecuteReader())
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{
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if (rdr.Read())
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{
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return new ItemTemplate
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{
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Id = rdr.GetInt32(0),
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Name = rdr.GetString(1),
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Width = rdr.GetDouble(2),
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Height = rdr.GetDouble(3),
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Depth = rdr.GetDouble(4)
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};
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}
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}
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// Check for same dimensions (exact match)
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cmd.CommandText = @"
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SELECT Id, Name, Width, Height, Depth FROM items
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WHERE Width = $w AND Height = $h AND Depth = $d
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LIMIT 1;";
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cmd.Parameters.Clear();
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cmd.Parameters.AddWithValue("$w", item.Width);
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cmd.Parameters.AddWithValue("$h", item.Height);
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cmd.Parameters.AddWithValue("$d", item.Depth);
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using (var rdr = cmd.ExecuteReader())
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{
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if (rdr.Read())
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{
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return new ItemTemplate
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{
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Id = rdr.GetInt32(0),
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Name = rdr.GetString(1),
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Width = rdr.GetDouble(2),
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Height = rdr.GetDouble(3),
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Depth = rdr.GetDouble(4)
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};
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}
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}
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return null;
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}
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}
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}
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