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

OpenArchival.Database/ArchiveStorageLocation/ArchiveStorageLocationProvider.cs

@@ -0,0 +1,63 @@
+using Dapper;
+using Npgsql;
+
+namespace OpenArchival.Database;
+
+public class ArchiveStorageLocationProvider : IArchiveStorageLocationProvider
+{
+    private NpgsqlDataSource _dataSource;
+
+    public ArchiveStorageLocationProvider(NpgsqlDataSource dataSource)
+    {
+        _dataSource = dataSource;
+    }
+
+    public async Task<bool> ContainsLocation(string location)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"SELECT EXISTS(SELECT 1 FROM archivestoragelocations WHERE location = @Location)";
+        
+        return await connection.ExecuteScalarAsync<bool>(sql, new {Location = location});
+    }
+
+    public async Task<bool> AddLocation(string location)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"INSERT INTO archivestoragelocations (location) VALUES (@Location)";
+
+        var rowsAffected = await connection.ExecuteAsync(sql, new { Location = location });
+        
+        return rowsAffected == 1;
+    }
+
+    public async Task<bool> RemoveLocation(string location)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"DELETE FROM archivestoragelocations WHERE location = @Location";
+
+        var rowsAffected = await connection.ExecuteAsync(sql, new { Location = location });
+
+        return rowsAffected == 1;
+    }
+
+    public async Task<IEnumerable<string>> SearchLocations(string query)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = @"SELECT location FROM archivestoragelocations WHERE POSITION(LOWER(@Query) in LOWER(location)) > 0";
+
+        return await connection.QueryAsync<string>(sql, new {Query=query});
+    }
+
+    public async Task<IEnumerable<string>> TopLocations(int resultCount)
+    {
+        await using var connection = await _dataSource.OpenConnectionAsync();
+
+        var sql = $@"SELECT location FROM archivestoragelocations ORDER BY location ASC LIMIT {resultCount}";
+
+        return await connection.QueryAsync<string>(sql);
+    }
+}