Adding of archive items is mostly operational. Need to handle file upload

OpenArchival.Database/FilePathProvider/FilePathProvider.cs

@@ -0,0 +1,59 @@
+using Dapper;
+using Npgsql;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OpenArchival.Database;
+
+public class FilePathProvider : IFilePathProvider
+{
+    NpgsqlDataSource _dataSource;
+
+    public FilePathProvider(NpgsqlDataSource dataSource)
+    {
+        _dataSource = dataSource;
+    }
+
+    public async Task<bool> AddFile(string path)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"INSERT INTO archivefiles (filename, path) VALUES (@Filename, @Path)";
+
+        var rowsAffected = await connection.ExecuteAsync(sql, new { Filename = Path.GetFileName(path), Path = path});
+
+        return rowsAffected == 1;
+    }
+
+    public async Task<bool> RemoveFile(string path)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"DELETE FROM archivefiles WHERE path = @Path";
+
+        var rowsAffected = await connection.ExecuteAsync(sql, new { Path = path });
+
+        return rowsAffected == 1;
+    }
+
+    public async Task<IEnumerable<FileInfo>> SearchFiles(string filename)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"SELECT * FROM archivefiles WHERE POSITION(LOWER(@Query) in LOWER(filename)) > 0";
+
+        return await connection.QueryAsync<FileInfo>(sql, new { Query = filename });
+    }
+
+    public async Task<IEnumerable<FileInfo>> TopFiles(int resultsCount)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = $@"SELECT * FROM archivefiles ORDER BY filename ASC LIMIT {resultsCount}";
+
+        return await connection.QueryAsync<FileInfo>(sql);
+    }
+}