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using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Npgsql;
using System.Collections.Generic;
using download_admin;
namespace download_admin.Pages;
public class IndexModel : PageModel
{
private readonly ILogger<IndexModel> _logger;
public IndexModel(ILogger<IndexModel> logger)
{
_logger = logger;
}
public void OnGet()
{
ViewData["Title"] = "Download Repsoitory Editor";
LoadData();
}
public void OnPost()
{
ViewData["Title"] = "Download Repsoitory Editor";
if (!String.IsNullOrEmpty(Request.Form["add"]))
{
DoAdd();
}
else if (!String.IsNullOrEmpty(Request.Form["delete"]))
{
DoDelete();
}
else if (!String.IsNullOrEmpty(Request.Form["update"]))
{
DoUpdate();
}
LoadData();
}
public List<FileObject>? Rows {get;private set;}
public bool HasError {get; private set;}
public string? ErrorText {get; private set;}
private void DoAdd()
{
try
{
string? key = Request.Form["key"];
string? mime_type = Request.Form["mime_type"];
string? file_name = Request.Form["file_name"];
IFormFile? file = Request.Form.Files.Count > 0 ? Request.Form.Files[0] : null;
if (String.IsNullOrWhiteSpace(key) ||
String.IsNullOrWhiteSpace(mime_type) ||
String.IsNullOrEmpty(file_name) ||
file == null)
{
SetError("Need key, mime type, file name and file");
return;
}
using var file_stream = file.OpenReadStream();
byte[] file_data = new byte[file.Length];
file_stream.Read(file_data, 0, (int)file.Length);
using var conn = new NpgsqlConnection(Config.Settings["ConnectionStrings:download"]);
conn.Open();
using var cmd = new NpgsqlCommand("INSERT INTO file_object (key, mime_type, file_name, data) VALUES (@key, @mime_type, @file_name, @data)", conn);
cmd.Parameters.AddWithValue("key", NpgsqlTypes.NpgsqlDbType.Varchar, key);
cmd.Parameters.AddWithValue("mime_type", NpgsqlTypes.NpgsqlDbType.Varchar, mime_type);
cmd.Parameters.AddWithValue("file_name", NpgsqlTypes.NpgsqlDbType.Varchar, file_name);
cmd.Parameters.AddWithValue("data", NpgsqlTypes.NpgsqlDbType.Bytea, file_data);
cmd.ExecuteNonQuery();
}
catch(Exception e)
{
SetError(e.Message);
}
}
private void DoDelete()
{
try
{
string? key = Request.Form["original_key"];
using var conn = new NpgsqlConnection(Config.Settings["ConnectionStrings:download"]);
conn.Open();
using var delete_download = new NpgsqlCommand("DELETE FROM download WHERE key = @original_key", conn);
delete_download.Parameters.AddWithValue("original_key", NpgsqlTypes.NpgsqlDbType.Varchar, key);
delete_download.ExecuteNonQuery();
using var delete_file = new NpgsqlCommand("DELETE FROM file_object WHERE key = @original_key", conn);
delete_file.Parameters.AddWithValue("original_key", NpgsqlTypes.NpgsqlDbType.Varchar, key);
delete_file.ExecuteNonQuery();
}
catch(Exception e)
{
SetError(e.Message);
}
}
private void DoUpdate()
{
try
{
string? original_key = Request.Form["original_key"];
string? key = Request.Form["key"];
string? mime_type = Request.Form["mime_type"];
string? file_name = Request.Form["file_name"];
IFormFile? file = Request.Form.Files.Count > 0 ? Request.Form.Files[0] : null;
if (file != null)
{
using var file_stream = file.OpenReadStream();
byte[] file_data = new byte[file.Length];
file_stream.Read(file_data, 0, (int)file.Length);
using var conn = new NpgsqlConnection(Config.Settings["ConnectionStrings:download"]);
conn.Open();
using var cmd = new NpgsqlCommand("UPDATE file_object set key=@key, mime_type=@mime_type, file_name=@file_name, data=@data WHERE key=@original_key", conn);
cmd.Parameters.AddWithValue("original_key", NpgsqlTypes.NpgsqlDbType.Varchar, original_key);
cmd.Parameters.AddWithValue("key", NpgsqlTypes.NpgsqlDbType.Varchar, key);
cmd.Parameters.AddWithValue("mime_type", NpgsqlTypes.NpgsqlDbType.Varchar, mime_type);
cmd.Parameters.AddWithValue("file_name", NpgsqlTypes.NpgsqlDbType.Varchar, file_name);
cmd.Parameters.AddWithValue("data", NpgsqlTypes.NpgsqlDbType.Bytea, file_data);
cmd.ExecuteNonQuery();
}
else
{
using var conn = new NpgsqlConnection(Config.Settings["ConnectionStrings:download"]);
conn.Open();
using var cmd = new NpgsqlCommand("UPDATE file_object set key=@key, mime_type=@mime_type, file_name=@file_name WHERE key=@original_key", conn);
cmd.Parameters.AddWithValue("original_key", NpgsqlTypes.NpgsqlDbType.Varchar, original_key);
cmd.Parameters.AddWithValue("key", NpgsqlTypes.NpgsqlDbType.Varchar, key);
cmd.Parameters.AddWithValue("mime_type", NpgsqlTypes.NpgsqlDbType.Varchar, mime_type);
cmd.Parameters.AddWithValue("file_name", NpgsqlTypes.NpgsqlDbType.Varchar, file_name);
cmd.ExecuteNonQuery();
}
}
catch(Exception e)
{
SetError(e.Message);
}
}
private void LoadData()
{
try
{
Rows = new List<FileObject>();
using var conn = new NpgsqlConnection(Config.Settings["ConnectionStrings:download"]);
conn.Open();
using var cmd = new NpgsqlCommand("SELECT key, mime_type, file_name, data FROM file_object ORDER BY key", conn);
using var reader = cmd.ExecuteReader();
while(reader.Read())
{
string key = (string)reader["key"];
string mime_type = (string)reader["mime_type"];
string file_name = (string)reader["file_name"];
byte[] data = (byte[])reader["data"];
Rows.Add(new FileObject(key, mime_type, file_name, data));
}
}
catch(Exception e)
{
SetError(e.Message);
}
}
private void SetError(string error_text)
{
HasError = true;
ErrorText = error_text;
}
}
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