Features/html meta extractor (#4)

* gave api access to the db project

* added db models

* working on rss extraction and meta extraction

* test project to debug rsswatcherjob

* added new configs for the project

* new interface to define collectors

* basic rss extraction and article details are now exposed

* tests updated for rss pull

* starting to get dapper working.  Query works but insert seems to have a value issue

* removed dapper from services

* added some basic tests for db calls

.vscode/settings.json

@@ -1,6 +1,8 @@
 {
     "files.exclude": {
         "**/obj": true,
-        "**/bin": true
-    }
+        "**/bin": false
+    },
+    "csharp.inlayHints.types.enabled": true,
+    "omnisharp.enableImportCompletion": true
 }

Newsbot.Collector.Api/Newsbot.Collector.Api.csproj

@@ -16,6 +16,7 @@
   <ItemGroup>
     <ProjectReference Include="..\Newsbot.Collector.Domain\Newsbot.Collector.Domain.csproj" />
     <ProjectReference Include="..\Newsbot.Collector.Services\Newsbot.Collector.Services.csproj" />
+    <ProjectReference Include="..\Newsbot.Collector.Database\Newsbot.Collector.Database.csproj" />
   </ItemGroup>
 
 </Project>

Newsbot.Collector.Api/Program.cs

@@ -1,6 +1,6 @@
 using Hangfire;
 using Hangfire.MemoryStorage;
-using Newsbot.Collector.Services;
+using Newsbot.Collector.Services.Jobs;
 using Newsbot.Collector.Domain.Models;
 
 var builder = WebApplication.CreateBuilder(args);
@@ -35,7 +35,7 @@ if (app.Environment.IsDevelopment())
 app.UseHttpsRedirection();
 
 app.UseHangfireDashboard();
-//RecurringJob.AddOrUpdate()
+RecurringJob.AddOrUpdate<HelloWorldJob>("Example", x => x.Execute(), "0/2 * * * *");
 
 app.UseAuthorization();
 

Newsbot.Collector.Database/Newsbot.Collector.Database.csproj

@@ -4,6 +4,11 @@
     <ProjectReference Include="..\Newsbot.Collector.Domain\Newsbot.Collector.Domain.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="dapper" Version="2.0.123" />
+    <PackageReference Include="Npgsql" Version="7.0.2" />
+  </ItemGroup>
+
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>

Newsbot.Collector.Database/Repositories/ArticlesTable.cs

@@ -0,0 +1,79 @@
+using System.Data;
+using Dapper;
+using Newsbot.Collector.Domain.Models;
+using Npgsql;
+
+namespace Newsbot.Collector.Database.Repositories;
+
+public class ArticlesTable
+{
+
+    private string _connectionString;
+
+    public ArticlesTable(string connectionString)
+    {
+        _connectionString = connectionString;
+    }
+
+    public static IDbConnection OpenConnection(string connectionString)
+    {
+        var cs = "Host=localhost;Username=postgres;Password=postgres;Database=postgres;sslmode=disable";
+        var conn = new NpgsqlConnection(cs);
+        conn.Open();
+        return conn;
+    }
+
+    public List<ArticlesModel> List(int Page = 0, int Count = 25)
+    {
+        using var conn = OpenConnection(_connectionString);
+        var res = conn.Query<ArticlesModel>(@"select * from articles 
+        Order By PubDate Desc 
+        Offset @Page
+        Fetch Next @Count Rows Only", new { Page = Page * Count, Count = Count }).ToList();
+        return res;
+    }
+
+    public ArticlesModel GetById(Guid ID)
+    {
+        using var conn = OpenConnection(_connectionString);
+        var res = conn.Query<ArticlesModel>("select * from articles where ID = @ID", new { ID = ID });
+        return res.First();
+    }
+
+    public ArticlesModel GetByUrl(string url)
+    {
+        using var conn = OpenConnection(_connectionString);
+        var res = conn.Query<ArticlesModel>("select * from articles where Url = @Url Limit 1", new { Url = url });
+        return res.First();
+    }
+
+    public void New(ArticlesModel model)
+    {
+        model.ID = Guid.NewGuid();
+
+        using var conn = OpenConnection(_connectionString);
+        var q = @"INSERT INTO Articles 
+        (ID, SourceId, Tags, Title, Url, PubDate, Video, VideoHeight, VideoWidth, Thumbnail, Description, AuthorName, AuthorImage)
+        Values
+        (@Id, @SourceId, @Tags, @Title, @Url, @PubDate, @Video, @VideoHeight, @VideoWidth, @Thumbnail, @Description, @AuthorName, @AuthorImage);
+        ";
+        var res = conn.Execute(q, model);
+        //new{
+        //    Id = Guid.NewGuid(),
+        //    SourceId = model.SourceID,
+        //    Tags = model.Tags,
+        //    Title = model.Title,
+        //    Url = model.URL,
+        //    PubDate = model.PubDate,
+        //    Video = model.Video,
+        //    VideoHeight = model.VideoHeight,
+        //    VideoWidth = model.VideoWidth,
+        //    Thumbnail = model.Thumbnail,
+        //    Description = model.Description,
+        //    AuthorName = model.AuthorName,
+        //    AuthorImage = model.AuthorImage
+        //});
+        Console.WriteLine(res);
+    }
+
+}

Newsbot.Collector.Database/Repositories/SettingsTable.cs

@@ -0,0 +1,34 @@
+using System.Data;
+using Dapper;
+using Newsbot.Collector.Domain.Models;
+using Npgsql;
+
+namespace Newsbot.Collector.Database.Repositories;
+
+public class SettingsTable
+{
+
+    private string _connectionString;
+
+    public SettingsTable(string connectionString)
+    {
+        _connectionString = connectionString;
+    }
+
+    public static IDbConnection OpenConnection(string connectionString)
+    {
+        var cs = "Host=localhost;Username=postgres;Password=postgres;Database=postgres;sslmode=disable";
+        var conn = new NpgsqlConnection(cs);
+        conn.Open();
+        return conn;
+    }
+
+    public void New(SettingModel model)
+    {
+        model.ID = Guid.NewGuid();
+
+        using var conn = OpenConnection(_connectionString);
+        var q = @"Insert Into Settings (ID, Key, Value, OPTIONS) Values (@ID,@Key,@Value,@Options)";
+        conn.Execute(q, model);
+    }
+}

Newsbot.Collector.Domain/Interfaces/ICollector.cs

@@ -1,6 +1,8 @@
+using Newsbot.Collector.Domain.Models;
+
 namespace Newsbot.Collector.Domain.Interfaces;
 
 public interface ICollector
 {
-    void Collect();
+    List<ArticlesModel> Collect();
 }

Newsbot.Collector.Domain/Models/DatabaseModel.cs

@@ -5,6 +5,7 @@ public class ArticlesModel
     public Guid ID { get; set; }
     public Guid SourceID { get; set; }
     public string Tags { get; set; } = "";
+    public string Title { get; set; } = "";
     public string URL { get; set; } = "";
     public DateTime PubDate { get; set; }
     public string Video { get; set; } = "";

Newsbot.Collector.Services/EnvLoader.cs

@@ -1,77 +0,0 @@
-using Newsbot.Collector.Domain.Models;
-
-namespace Newsbot.Collector.Services;
-
-public static class EnvLoader
-{
-
-    public static ConfigModel Load()
-    {
-        var reddit = new RedditConfigModel
-        {
-            IsEnabled = Bool("FEATURE_ENABLE_REDDIT_BACKEND"),
-            PullHot = Bool("REDDIT_PULL_HOT"),
-            PullNsfw = Bool("REDDIT_PULL_NSFW"),
-            PullTop = Bool("REDDIT_PULL_TOP")
-        };
-
-        return new ConfigModel
-        {
-            ServerAddress = String("SERVER_ADDRESS"),
-            SqlConnectionString = String("SQL_CONNECTION_STRING"),
-            Reddit = reddit,
-        };
-    }
-
-    public static void LoadEnvFile()
-    {
-        var curDir = Directory.GetCurrentDirectory();
-        var filePath = Path.Combine(curDir, ".env");
-
-        if (!File.Exists(filePath))
-            return;
-
-        foreach (var line in File.ReadAllLines(filePath))
-        {
-            var parts = line.Split('=', StringSplitOptions.RemoveEmptyEntries);
-
-            if (parts.Length != 2)
-                continue;
-
-            if (parts[1].Contains("'") == true ){
-                parts[1] = parts[1].Replace("'", "");
-            }
-
-        Environment.SetEnvironmentVariable(parts[0], parts[1]);
-    }
-}
-
-private static string String(string Key)
-{
-    var result = Environment.GetEnvironmentVariable(Key);
-    if (result is null)
-    {
-        return "";
-    }
-
-    return result;
-}
-
-private static bool Bool(string Key)
-{
-    var result = String(Key);
-    if (result == "")
-    {
-        return false;
-    }
-
-    if (result.ToLower() == "true")
-    {
-        return true;
-    }
-    else
-    {
-        return false;
-    }
-}
-}

Newsbot.Collector.Services/HtmlMeta.cs

@@ -0,0 +1,129 @@
+using System.Data;
+using System.Runtime.Serialization;
+using System.Xml;
+using HtmlAgilityPack;
+
+namespace Newsbot.Collector.Services;
+
+public class HtmlData
+{
+    public HtmlHeaderData Header { get; set; } = new HtmlHeaderData();
+}
+
+public class HtmlHeaderData
+{
+    public HtmlMetaData Meta { get; set; } = new HtmlMetaData();
+}
+
+public class HtmlMetaData
+{
+    public string Title { get; set; } = "";
+    public string Description { get; set; } = "";
+    public string Image { get; set; } = "";
+    public string Url { get; set; } = "";
+    public string PageType { get; set; } = "";
+    //public string Color { get; set; }
+}
+
+public class HtmlPageReader
+{
+
+    public HtmlData Data { get; set; }
+
+    private const string XPathMetaTag = "//head/meta";
+
+    private string _siteContent;
+
+    public HtmlPageReader(string pageUrl)
+    {
+        _siteContent = ReadSiteContent(pageUrl);
+        var tags = CollectMetaTags();
+
+        Data = new HtmlData();
+        Data.Header.Meta.Title = GetMetaTitle();
+        Data.Header.Meta.Description = GetDescription();
+        Data.Header.Meta.Image = GetImage();
+        Data.Header.Meta.Url = GetUrl();
+        Data.Header.Meta.PageType = GetPageType();
+    }
+
+    private string ReadSiteContent(string url)
+    {
+        using var client = new HttpClient();
+        var html = client.GetStringAsync(url);
+        html.Wait();
+
+        var content = html.Result.ToString();
+        return content;
+    }
+
+    private List<HtmlNode> CollectMetaTags()
+    {
+        var htmlDoc = new HtmlDocument();
+        htmlDoc.LoadHtml(_siteContent);
+
+        var tags = htmlDoc.DocumentNode.SelectNodes(XPathMetaTag).ToList();
+
+        return tags;
+    }
+
+    public string GetTagValue(string Tag)
+    {
+        var tags = CollectMetaTags();
+
+        foreach (var meta in tags)
+        {
+            //Console.WriteLine($"Name={meta.Attributes[0].Name} & Value={meta.Attributes[0].Value}");
+            if (meta.Attributes[0].Value.Contains(Tag) == false)
+            {
+                continue;
+            }
+            return meta.Attributes[1].Value;
+        }
+        return "";
+    }
+
+    private string FindFirstResult(string[] tags)
+    {
+        foreach (var tag in tags)
+        {
+            var res = GetTagValue(tag);
+            if (res == "")
+            {
+                continue;
+            }
+            return res;
+        }
+        return "";
+    }
+
+    public string GetMetaTitle()
+    {
+        string[] tags = new string[] { "og:title", "twitter:title", "title" };
+        return FindFirstResult(tags);
+    }
+
+    public string GetDescription()
+    {
+        string[] tags = new string[] { "description", "og:description" };
+        return FindFirstResult(tags);
+    }
+
+    public string GetImage()
+    {
+        string[] tags = new string[] { "image", "og:image", "twitter:image" };
+        return FindFirstResult(tags);
+    }
+
+    public string GetUrl()
+    {
+        string[] tags = new string[] { "url", "og:url", "twitter:url" };
+        return FindFirstResult(tags);
+    }
+
+    public string GetPageType()
+    {
+        string[] tags = new string[] { "og:type", "type" };
+        return FindFirstResult(tags);
+    }
+}

Newsbot.Collector.Services/Jobs/HelloWorldJob.cs

@@ -4,13 +4,18 @@ namespace Newsbot.Collector.Services.Jobs;
 public class HelloWorldJob
 {
 
-    public readonly string _message;
+    public string _message { get; set; }
 
     public HelloWorldJob(string message)
     {
         _message = message;
     }
 
+    public void SetMessage(string message)
+    {
+        _message = message;
+    }
+
     public void Execute()
     {
         Console.WriteLine(_message);

Newsbot.Collector.Services/Jobs/RssWatcherJob.cs

@@ -0,0 +1,66 @@
+using System.ServiceModel.Syndication;
+using System.Xml;
+using Newsbot.Collector.Domain.Interfaces;
+using Newsbot.Collector.Domain.Models;
+
+namespace Newsbot.Collector.Services.Jobs;
+
+public class RssWatcherJob : ICollector
+{
+
+    private string? _url;
+
+    public RssWatcherJob(string url)
+    {
+        _url = url;
+    }
+
+    public List<ArticlesModel> Collect()
+    {
+        var CollectedPosts = new List<ArticlesModel>();
+
+        if (_url is null)
+        {
+            _url = "";
+        }
+
+        using var reader = XmlReader.Create(_url);
+        var feed = SyndicationFeed.Load(reader);
+        var posts = feed.Items.ToList();
+
+        foreach (var post in posts)
+        {
+            var url = post.Links[0].Uri.AbsoluteUri;
+
+            // Check if we have seen the url before
+            // If we have, skip and save the site bandwidth
+
+            var meta = new HtmlPageReader(url);
+
+            var article = new ArticlesModel
+            {
+                Title = post.Title.Text,
+                Tags = FetchTags(post),
+                URL = post.Links[0].Uri.ToString(),
+                PubDate = post.PublishDate.DateTime,
+                Thumbnail = meta.Data.Header.Meta.Image,
+                Description = meta.Data.Header.Meta.Description,
+            };
+            CollectedPosts.Add(article);
+
+            // try to not be too greedy
+            Thread.Sleep(3000);
+        }
+        return CollectedPosts;
+    }
+
+    private string FetchTags(SyndicationItem post)
+    {
+        string result = "";
+        foreach (var tag in post.Categories)
+        {
+            result += $"{tag.Name},";
+        }
+        return result;
+    }
+}

Newsbot.Collector.Services/Newsbot.Collector.Services.csproj

@@ -2,10 +2,12 @@
 
   <ItemGroup>
     <ProjectReference Include="..\Newsbot.Collector.Domain\Newsbot.Collector.Domain.csproj" />
+    <ProjectReference Include="..\Newsbot.Collector.Database\Newsbot.Collector.Database.csproj" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Npgsql" Version="7.0.1" />
+    <PackageReference Include="HtmlAgilityPack" Version="1.11.46" />
+    <PackageReference Include="System.ServiceModel.Syndication" Version="7.0.0" />
   </ItemGroup>
 
   <PropertyGroup>

Newsbot.Collector.Tests/Jobs/RssWatcherJobTest.cs

@@ -0,0 +1,14 @@
+using Newsbot.Collector.Services.Jobs;
+
+namespace Newsbot.Collector.Tests.Jobs;
+
+public class RssWatcherJobTest
+{
+    [Fact]
+    public void CanFindItems()
+    {
+        var url = "https://www.engadget.com/rss.xml";
+        var client = new RssWatcherJob(url);
+        var items = client.Collect();
+    }
+}

Newsbot.Collector.Tests/Newsbot.Collector.Tests.csproj

@@ -21,4 +21,9 @@
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\Newsbot.Collector.Services\Newsbot.Collector.Services.csproj" />
+    <ProjectReference Include="..\Newsbot.Collector.Database\Newsbot.Collector.Database.csproj" />
+  </ItemGroup>
+
 </Project>

Newsbot.Collector.Tests/Tables/ArticlesTableTests.cs

@@ -0,0 +1,40 @@
+using Newsbot.Collector.Database.Repositories;
+using Newsbot.Collector.Domain.Models;
+
+namespace Newsbot.Collector.Tests.Tables;
+
+public class ArticlesTableTests
+{
+
+    [Fact]
+    public void ArticlesListTest()
+    {
+        var client = new ArticlesTable("");
+        client.List();
+    }
+
+    [Fact]
+    public void GetByIDTest()
+    {
+        var uid = Guid.Parse("4ac46772-253c-4c3d-8a2c-29239abd2ad4");
+
+        var client = new ArticlesTable("");
+        var res = client.GetById(uid);
+        if (!res.ID.Equals(uid))
+        {
+            Assert.Fail("Incorrect record or not found");
+        }
+    }
+
+    [Fact]
+    public void NewRecordTest()
+    {
+        var client = new ArticlesTable("");
+        client.New(new ArticlesModel
+        {
+            Title = "Unit Testing!",
+            SourceID = Guid.NewGuid(),
+            PubDate = DateTime.Now
+        });
+    }
+}

Newsbot.Collector.Tests/Tables/SettingsTableTests.cs

@@ -0,0 +1,19 @@
+using Newsbot.Collector.Database.Repositories;
+using Newsbot.Collector.Domain.Models;
+
+namespace Newsbot.Collector.Tests.Tables;
+
+public class SettingsTableTests
+{
+    [Fact]
+    public void New()
+    {
+        var client = new SettingsTable("");
+        client.New(new SettingModel
+        {
+            Key = "Unit Testing",
+            Value = "Unit",
+            Options = ""
+        });
+    }
+}