90 lines
2.8 KiB
C#
90 lines
2.8 KiB
C#
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using NewsBlogAbstractions.Models;
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using NewsBlogAbstractions.WorkAbstractions;
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using Npgsql;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace NewsBlogDatabaseImplementation.WorkImplementation
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{
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public class CommentWork : ICommentWork
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{
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public Comment? Create(Comment comment)
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{
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using var con = SqlConnection.GetConnection();
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con.Open();
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using var cmd = new NpgsqlCommand("INSERT INTO comment (title, content, create_date, article_id) VALUES (@Title, @Content, @Create_date, @Article_id)", con);
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cmd.Parameters.AddWithValue("@Title", comment.Title);
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cmd.Parameters.AddWithValue("@Content", comment.Content);
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cmd.Parameters.AddWithValue("@Create_date", comment.CreateDate);
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cmd.Parameters.AddWithValue("@Article_id", comment.ArticleId == 0 ? DBNull.Value : comment.ArticleId);
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cmd.ExecuteNonQuery();
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return comment;
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}
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public Comment? Delete(int id)
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{
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var element = Get(id);
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using var con = SqlConnection.GetConnection();
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con.Open();
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using var cmd = new NpgsqlCommand($"DELETE FROM comment WHERE comment_id = {id}", con);
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cmd.ExecuteNonQuery();
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return element;
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}
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public Comment? Get(int id)
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{
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using var con = SqlConnection.GetConnection();
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con.Open();
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using var cmd = new NpgsqlCommand($"SELECT * FROM comment WHERE comment_id = {id}", con);
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using var reader = cmd.ExecuteReader();
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if (reader.Read())
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{
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return new Comment
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{
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Id = reader.GetInt32(0),
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Title = reader.GetString(1),
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Content = reader.GetString(2),
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CreateDate = reader.GetDateTime(3),
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ArticleId = !reader.IsDBNull(4) ? reader.GetInt32(4) : 0,
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};
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}
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return null;
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}
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public List<Comment> GetAll()
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{
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var comments = new List<Comment>();
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using var con = SqlConnection.GetConnection();
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con.Open();
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using var cmd = new NpgsqlCommand("SELECT * FROM comment order by comment_id", con);
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using var reader = cmd.ExecuteReader();
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while (reader.Read())
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{
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comments.Add(new Comment
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{
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Id = reader.GetInt32(0),
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Title = reader.GetString(1),
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Content = reader.GetString(2),
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CreateDate = reader.GetDateTime(3),
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ArticleId = !reader.IsDBNull(4) ? reader.GetInt32(4) : 0,
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});
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}
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return comments;
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}
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public Comment? Update(Comment comment)
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{
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using var con = SqlConnection.GetConnection();
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con.Open();
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using var cmd = new NpgsqlCommand($"UPDATE comment SET title = '{comment.Title}', content = '{comment.Content}', create_date = '{comment.CreateDate}', article_id = @Article_Id WHERE comment_id = {comment.Id}", con);
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cmd.Parameters.AddWithValue("@Article_Id", comment.ArticleId == 0 ? DBNull.Value : comment.ArticleId);
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cmd.ExecuteNonQuery();
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var element = Get(comment.Id);
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return element;
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}
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}
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}
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