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Refactoring: Added interfaces, custom exceptions, UserManager unit tests, dependency injection/inversion; Regex match search by date, keywords

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This commit is contained in:
Dimitar Byalkov
2023-06-06 17:52:36 +02:00
parent 180b261d37
commit 53c42a35d8
43 changed files with 668 additions and 211 deletions
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84
StudentHouseDashboard/Data/AnnouncementRepository.cs
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@@ -1,14 +1,17 @@
using Models;
using Logic;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Logic.Exceptions;
using System.Reflection;
namespace Data
{
public class AnnouncementRepository
public class AnnouncementRepository : IAnnouncementRepository
{
public AnnouncementRepository() { }
public List<Announcement> GetAllAnnouncements()
@@ -58,21 +61,21 @@ namespace Data
return announcement;
}
}
public List<Announcement> GetAnnouncementsByPage(int? p, int? c)
public List<Announcement> GetAnnouncementsByPage(int p, int c)
{
List<Announcement> announcements = new List<Announcement>();
UserRepository userRepository = new UserRepository();
if (c == null || c < 0)
if (c == null)
{
c = 10;
throw new DatabaseOperationException("Get announcements: Invalid item count");
}
if (p == null || p < 0)
if (p == null)
{
p = 0;
throw new DatabaseOperationException("Get announcements: Invalid page number");
}
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
{
string sql = "SELECT * FROM Announcements ORDER BY ID OFFSET @start ROWS FETCH NEXT @count ROWS ONLY;";
string sql = "SELECT * FROM Announcements ORDER BY ID DESC OFFSET @start ROWS FETCH NEXT @count ROWS ONLY;";
SqlCommand sqlCommand = new SqlCommand(sql, conn);
sqlCommand.Parameters.AddWithValue("@start", p * c);
sqlCommand.Parameters.AddWithValue("@count", c);
@@ -89,7 +92,7 @@ namespace Data
}
return announcements;
}
public bool CreateAnnouncement(string title, string description, User author, DateTime publishDate, bool isImportant, bool isSticky)
public void CreateAnnouncement(string title, string description, User author, DateTime publishDate, bool isImportant, bool isSticky)
{
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
{
@@ -102,15 +105,13 @@ namespace Data
cmd.Parameters.AddWithValue("@important", isImportant);
cmd.Parameters.AddWithValue("@sticky", isSticky);
int writer = cmd.ExecuteNonQuery();
if (writer == 1)
if (writer != 1)
{
return true;
throw new DatabaseOperationException("Database error: Announcement not created");
}
else return false;
}
}
public bool UpdateAnnouncement(int id, string title, string description, bool isImportant, bool isSticky)
public void UpdateAnnouncement(int id, string title, string description, bool isImportant, bool isSticky)
{
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
{
@@ -124,15 +125,13 @@ namespace Data
cmd.Parameters.AddWithValue("@sticky", isSticky);
cmd.Parameters.AddWithValue("@id", id);
int writer = cmd.ExecuteNonQuery();
if (writer == 1)
if (writer != 1)
{
return true;
throw new DatabaseOperationException("Database error: Announcement not updated");
}
else return false;
}
}
public bool DeleteAnnouncement(int id)
public void DeleteAnnouncement(int id)
{
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
{
@@ -140,13 +139,54 @@ namespace Data
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.Parameters.AddWithValue("@id", id);
int writer = cmd.ExecuteNonQuery();
if (writer == 1)
if (writer != 1)
{
return true;
throw new DatabaseOperationException("Database error: Announcement not deleted");
}
else return false;
}
}
public List<Announcement> SearchAnnouncement(string query)
{
if (string.IsNullOrEmpty(query))
{
throw new DatabaseOperationException("Search announements error: Search query is empty");
}
List<Announcement> announcements = new List<Announcement>();
UserRepository userRepository = new UserRepository();
StringBuilder sql = new StringBuilder();
sql.Append("SELECT * FROM Announcements ");
string[] searchStrings = query.Trim().Split(' ');
for (int i = 0; i < searchStrings.Length; i++)
{
if (i == 0)
{
sql.Append($"WHERE Title LIKE @query{i} OR Description LIKE @query{i} ");
}
else
{
sql.Append($"OR Title LIKE @query{i} OR Description LIKE @query{i} ");
}
}
sql.Append(';');
using (SqlConnection conn = SqlConnectionHelper.CreateConnection())
{
SqlCommand sqlCommand = new SqlCommand(sql.ToString(), conn);
for (int i = 0; i < searchStrings.Length; i++)
{
sqlCommand.Parameters.AddWithValue($"@query{i}", $"%{searchStrings[i]}%");
}
var reader = sqlCommand.ExecuteReader();
while (reader.Read())
{
announcements.Add(new Announcement(Convert.ToInt32(reader["ID"]),
userRepository.GetUserById(Convert.ToInt32(reader["Author"])),
reader["Description"].ToString(), reader["Title"].ToString(),
(DateTime)reader["PublishDate"], (bool)reader["IsImportant"],
(bool)reader["IsSticky"]));
}
}
return announcements;
}
}
}