SharpRSS/SharpRss/DbAccess.cs

using System;
using System.Collections.Generic;
using System.Data.Common;
using System.IO;
using System.Linq;
using System.Security.Policy;
using System.Threading.Tasks;
using Dapper;
using Microsoft.Data.Sqlite;
using Serilog;
using SharpRss.Models;

namespace SharpRss
{
    internal static class DbAccess
    {
        static DbAccess()
        {
            Initialize();
        }
        private static readonly string ConnectionString = $"Data Source={Path.Combine(Environment.CurrentDirectory, "sharp_rss.sqlite")};";
        private static bool _isInitialized;

        public static async Task SetSyndicationAsync(SyndicationContainer synContainer)
        {
            if (synContainer.Category != null)
                await SetCategoryAsync(synContainer.Category);
            if (synContainer.FeedModel != null)
                await SetFeedAsync(synContainer.FeedModel);
            if (synContainer.FeedItems != null && synContainer.FeedItems.Any())
                await SetFeedItemsAsync(synContainer.FeedItems);
        }

        public static async Task<HashSet<CategoryModel>> GetCategoriesAsync()
        {
            HashSet<CategoryModel> categories = new HashSet<CategoryModel>();
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            await using DbDataReader reader = await dbc.ExecuteReaderAsync("SELECT * FROM category");
            while (await reader.ReadAsync())
            {
                CategoryModel categoryModel = new CategoryModel()
                {
                    Id = reader["id"].ToString(),
                    Name = reader["name"].ToString(),
                    HexColor = reader["hex_color"].ToString(),
                    FeedCount = 0, // Not implemented.
                    Icon = reader["icon"].ToString()
                };
                categories.Add(categoryModel);
            }
            return categories;
        }
        public static async Task<bool> SetCategoryAsync(CategoryModel category)
        {
            if (category == null) return false;
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            int affected = await dbc.ExecuteAsync("INSERT OR REPLACE INTO category (id, hex_color, icon, name) VALUES (IFNULL((SELECT id FROM category WHERE name=@Name), @Id), @HexColor, @Icon, @Name)",
                new { category.Id, category.HexColor, category.Icon, category.Name });
            return affected > 0;
        }
        public static async Task<bool> DeleteCategory(CategoryModel category)
        {
            if (category == null) return false;
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            int affected = await dbc.ExecuteAsync("DELETE FROM category WHERE id=@Id; UPDATE feed SET category_id=NULL WHERE category_id=@Id",new { category.Id });
            return affected > 0;
        }

        public static async Task SetFeedAsync(FeedModel feed)
        {
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            DynamicParameters parameters = new DynamicParameters();
            parameters.Add("url", feed.OriginalUrl ?? string.Empty);
            parameters.Add("title", feed.Title ?? string.Empty);
            parameters.Add("categoryId", feed.CategoryId ?? string.Empty);
            parameters.Add("feedType", feed.FeedType ?? string.Empty);
            parameters.Add("description", feed.Description ?? string.Empty);
            parameters.Add("language", feed.Language ?? string.Empty);
            parameters.Add("copyright", feed.Copyright ?? string.Empty);
            parameters.Add("publicationDate", feed.PublicationDate?.ToUnixTimeMilliseconds() ?? 0);
            parameters.Add("lastUpdated", feed.LastUpdated?.ToUnixTimeMilliseconds() ?? 0);
            parameters.Add("categories", feed.Categories.Any() ? string.Join(',', feed.Categories) : string.Empty);
            parameters.Add("imageUrl", feed.ImageUrl ?? string.Empty);
            int affected = await dbc.ExecuteAsync("INSERT OR REPLACE INTO feed (url, title, category_id, feed_type, feed_version, description, language, copyright, publication_date, last_updated, categories, image_url) VALUES (@url, @title, @categoryId, @feedType, @feedVersion, @description, @language, @copyright, @publicationDate, @lastUpdated, @categories, @imageUrl)", param: parameters);
            /*int affected = await dbc.ExecuteAsync("INSERT OR REPLACE INTO feed (url, title, category_id, feed_type, feed_version, description, language, copyright, publication_date, last_updated, categories, image_url) VALUES (@Url, @Title, @CategoryId, @FeedType, @FeedVersion, @Description, @language, @Copyright, @PublicationDate, @LastUpdated, @Categories, @ImageUrl)",
                new
                {
                    Url = feed.OriginalUrl ?? string.Empty,
                    Title = feed.Title ?? string.Empty,
                    CategoryId = feed.CategoryId ?? string.Empty,
                    FeedType = feed.FeedType ?? string.Empty,
                    Description = feed.Description ?? string.Empty,
                    Language = feed.Language ?? string.Empty,
                    Copyright = feed.Copyright ?? string.Empty,
                    PublicationDate = feed.PublicationDate?.ToUnixTimeMilliseconds() ?? 0,
                    LastUpdated = feed.LastUpdated?.ToUnixTimeMilliseconds() ?? 0,
                    Categories = feed.Categories.Any() ? string.Join(',', feed.Categories) : string.Empty,
                    ImageUrl = feed.ImageUrl ?? string.Empty
                });*/
            if (affected == 0)
                Log.Warning("Failed to add feed: {FeedUrl}", feed.OriginalUrl);
        }
        public static async Task<HashSet<FeedModel>> GetFeedsAsync(string[]? categoryIds = null)
        {
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            HashSet<FeedModel> feeds = new HashSet<FeedModel>();
            await using DbDataReader reader = await dbc.ExecuteReaderAsync(categoryIds == null ? "SELECT * FROM feed" : "SELECT * FROM feed WHERE category_id IN(@CatIds)", new { CatIds = categoryIds });
            while (await reader.ReadAsync())
            {
                FeedModel feedModel = new FeedModel()
                {
                    OriginalUrl = reader["url"].ToString(),
                    Title = reader["title"].ToString(),
                    CategoryId = reader["category_id"].ToString(),
                    FeedType = reader["feed_type"].ToString(),
                    FeedVersion = reader["feed_version"].ToString(),
                    Description = reader["description"].ToString(),
                    Language = reader["language"].ToString(),
                    Copyright = reader["copyright"].ToString(),
                    PublicationDate = DateTimeOffset.FromUnixTimeMilliseconds(long.Parse(reader["publication_date"].ToString())),
                    LastUpdated = DateTimeOffset.FromUnixTimeMilliseconds(long.Parse(reader["last_updated"].ToString())),
                    Categories = reader["categories"].ToString().Split(','),
                    ImageUrl = reader["image_url"].ToString()
                };
                feeds.Add(feedModel);
            }
            return feeds;
        }

        public static async Task SetFeedItemsAsync(HashSet<FeedItemModel> items)
        {
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            int totalAffected = 0;
            await using SqliteTransaction dbTransaction = dbc.BeginTransaction();
            foreach (FeedItemModel item in items)
            {
                DynamicParameters parameters = new DynamicParameters();
                parameters.Add("id", item.Id ?? string.Empty);
                parameters.Add("feedurl", item.FeedUrl ?? string.Empty);
                parameters.Add("read", item.Read.ToString());
                parameters.Add("description", item.Description ?? string.Empty);
                parameters.Add("link", item.Link ?? string.Empty);
                parameters.Add("lastUpdated", item.LastUpdated?.ToUnixTimeMilliseconds() ?? 0);
                parameters.Add("publishingDate", item.PublishingDate?.ToUnixTimeMilliseconds() ?? 0);
                parameters.Add("authors", item.Authors.Any() ? string.Join(',', item.Authors) : string.Empty);
                parameters.Add("categories", item.Categories.Any() ? string.Join(',', item.Categories) : string.Empty);
                parameters.Add("content", item.Content ?? string.Empty);
                int affected = await dbc.ExecuteAsync("INSERT OR REPLACE INTO feed_item (id, feed_url, read, title, description, link, last_updated, publishing_date, authors, categories, content) VALUES (@id, @feedUrl, @read, @title, @description, @link, @lastUpdated, @publishingDate, @authors, @categories, @content)",
                    parameters,
                    transaction: dbTransaction);
                /*int affected = await dbc.ExecuteAsync("INSERT OR REPLACE INTO feed_item (id, feed_url, read, title, description, link, last_updated, publishing_date, authors, categories, content) VALUES (@Id, @FeedUrl, @Read, @Title, Description, @Link, @LastUpdated, @PublishingDate, @Authors, @Categories, @Content)",
                    transaction: dbTransaction,
                    param: new
                    {
                        Id = item.Id ?? string.Empty,
                        FeedUrl = item.FeedUrl ?? string.Empty,
                        Read = item.Read.ToString(),
                        Description = item.Description ?? string.Empty,
                        Link = item.Link ?? string.Empty,
                        LastUpdated = item.LastUpdated?.ToUnixTimeMilliseconds() ?? 0,
                        PublishingDate = item.PublishingDate?.ToUnixTimeMilliseconds() ?? 0,
                        Authors = item.Authors.Any() ? string.Join(',', item.Authors) : string.Empty,
                        Categories = item.Categories.Any() ? string.Join(',', item.Categories) : string.Empty,
                        Content = item.Content ?? string.Empty
                    });*/
                totalAffected += affected;
            }
            dbTransaction.Commit();
        }
        public static async Task<HashSet<FeedItemModel>> GetFeedItemsAsync(string[]? feedUrls)
        {
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            HashSet<FeedItemModel> items = new HashSet<FeedItemModel>();
            await using DbDataReader reader = await dbc.ExecuteReaderAsync(feedUrls == null ? "SELECT * FROM feed_item" : "SELECT * FROM feed_item WHERE feed_item.feed_url IN(@Urls)", new { Urls = feedUrls });
            while (await reader.ReadAsync())
            {
                FeedItemModel feedItemModel = new FeedItemModel()
                {
                    Id = reader["id"].ToString(),
                    FeedUrl = reader["feed_url"].ToString(),
                    Read = bool.Parse(reader["read"].ToString()),
                    Title = reader["title"].ToString(),
                    Description = reader["description"].ToString(),
                    Link = reader["link"].ToString(),
                    LastUpdated = DateTimeOffset.FromUnixTimeMilliseconds(long.Parse(reader["last_updated"].ToString())),
                    PublishingDate = DateTimeOffset.FromUnixTimeMilliseconds(long.Parse(reader["publishing_date"].ToString())),
                    Authors = reader["authors"].ToString().ToString().Split(','),
                    Categories = reader["categories"].ToString().Split(','),
                    Content = reader["content"].ToString()
                };
                items.Add(feedItemModel);
            }
            return items;
        }

        private static async void Initialize()
        {
            if (_isInitialized) return;
            Log.Verbose("Checking database...");
            await using SqliteConnection dbc = new SqliteConnection(ConnectionString);
            dbc.Open();
            Log.Verbose("Checking table: {Table}", "category");
            await dbc.ExecuteAsync("CREATE TABLE IF NOT EXISTS category (id STRING PRIMARY KEY, name STRING NOT NULL, hex_color STRING NOT NULL, icon STRING)");

            Log.Verbose("Checking table: {Table}", "feed");
            await dbc.ExecuteAsync("CREATE TABLE IF NOT EXISTS feed (url STRING PRIMARY KEY, title STRING, category_id STRING, feed_type STRING, feed_version STRING, description STRING, language STRING, copyright STRING, publication_date INT, last_updated INT, categories STRING, image_url STRING)");

            Log.Verbose("Checking table: {Table}", "feed_item");
            await dbc.ExecuteAsync("CREATE TABLE IF NOT EXISTS feed_item (id STRING PRIMARY KEY, feed_url STRING, read STRING, title STRING, description STRING, link STRING, last_updated INT, publishing_date INT, authors STRING, categories STRING, content STRING)");
            Log.Verbose("Checking database done!");
            _isInitialized = true;
        }
    }
}