From 6f513809dec6119ec7afa1fe177c3a2dd77539af Mon Sep 17 00:00:00 2001
From: Samuele Locatelli <samuele@steamware.net>
Date: Wed, 24 Apr 2024 18:21:13 +0200
Subject: [PATCH] Add API health services

---
 Resources/ChangeLog.html                     |  2 +-
 Resources/VersNum.txt                        |  2 +-
 Resources/manifest.xml                       |  2 +-
 WebDoorCreator.API/Health/Checks.cs          | 95 ++++++++++++++++++++
 WebDoorCreator.API/Program.cs                | 62 +++++++++++++
 WebDoorCreator.API/WebDoorCreator.API.csproj | 10 +++
 WebDoorCreator.UI/Program.cs                 |  6 +-
 WebDoorCreator.UI/WebDoorCreator.UI.csproj   |  2 +-
 8 files changed, 173 insertions(+), 8 deletions(-)
 create mode 100644 WebDoorCreator.API/Health/Checks.cs
diff --git a/Resources/ChangeLog.html b/Resources/ChangeLog.html
index c38c545..3380406 100644
--- a/Resources/ChangeLog.html
+++ b/Resources/ChangeLog.html
@@ -1,6 +1,6 @@
 <body>
     <i>WebDoorCreator - Egalware</i>
-    <h4>Version: 0.9.2404.2317</h4>
+    <h4>Version: 0.9.2404.2417</h4>
     <br /> Release note:
     <ul>
         <li>
diff --git a/Resources/VersNum.txt b/Resources/VersNum.txt
index e4a6ced..cc045af 100644
--- a/Resources/VersNum.txt
+++ b/Resources/VersNum.txt
@@ -1 +1 @@
-0.9.2404.2317
+0.9.2404.2417
diff --git a/Resources/manifest.xml b/Resources/manifest.xml
index 439962a..e9d2d07 100644
--- a/Resources/manifest.xml
+++ b/Resources/manifest.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <item>
-  <version>0.9.2404.2317</version>
+  <version>0.9.2404.2417</version>
   <url>http://nexus.steamware.net/repository/SWS/WDC/stable/WDC.UI.zip</url>
   <changelog>http://nexus.steamware.net/repository/SWS/WDC/stable/ChangeLog.html</changelog>
   <mandatory>false</mandatory>
diff --git a/WebDoorCreator.API/Health/Checks.cs b/WebDoorCreator.API/Health/Checks.cs
new file mode 100644
index 0000000..d770f41
--- /dev/null
+++ b/WebDoorCreator.API/Health/Checks.cs
@@ -0,0 +1,95 @@
+﻿using Microsoft.Extensions.Diagnostics.HealthChecks;
+using NLog;
+using System.Net.NetworkInformation;
+using WebDoorCreator.Data;
+
+namespace WebDoorCreator.API.Health
+{
+    public class Checks
+    {
+        #region Public Methods
+
+        public static async Task<HealthCheckResult> ConfigCount(IConfiguration _config)
+        {
+            string description = "Try check Config table";
+            var healthCheckData = new Dictionary<string, object>();
+            using (WDCDataContext localDbCtx = new WDCDataContext(_config))
+            {
+                var dbCount = localDbCtx
+                               .DbSetConfig
+                               .Count();
+                if (dbCount > 0)
+                {
+                    description = $"Check Config table, found {dbCount} records";
+                    healthCheckData.Add("Count", dbCount);
+                    return HealthCheckResult.Healthy(description, healthCheckData);
+                }
+            }
+
+            await Task.Delay(1);
+            return HealthCheckResult.Unhealthy(description + $" NO RECORD found", null, healthCheckData);
+        }
+
+        public static async Task<HealthCheckResult> DoorsCount(IConfiguration _config)
+        {
+            string description = "Try check DOOR table";
+            var healthCheckData = new Dictionary<string, object>();
+            using (WDCDataContext localDbCtx = new WDCDataContext(_config))
+            {
+                var dbCount = localDbCtx
+                               .DbSetDoor
+                               .Count();
+                if (dbCount > 0)
+                {
+                    description = $"Check DOOR table, found {dbCount} records";
+                    healthCheckData.Add("Count", dbCount);
+                    return HealthCheckResult.Healthy(description, healthCheckData);
+                }
+            }
+
+            await Task.Delay(1);
+            return HealthCheckResult.Unhealthy(description + $" NO RECORD found", null, healthCheckData);
+        }
+
+        public static async Task<HealthCheckResult> OrdersCount(IConfiguration _config)
+        {
+            string description = "Try check ORDER table";
+            var healthCheckData = new Dictionary<string, object>();
+            using (WDCDataContext localDbCtx = new WDCDataContext(_config))
+            {
+                var dbCount = localDbCtx
+                               .DbSetOrders
+                               .Count();
+                if (dbCount > 0)
+                {
+                    description = $"Check ORDER table, found {dbCount} records";
+                    healthCheckData.Add("Count", dbCount);
+                    return HealthCheckResult.Healthy(description, healthCheckData);
+                }
+            }
+
+            await Task.Delay(1);
+            return HealthCheckResult.Unhealthy(description + $" NO RECORD found", null, healthCheckData);
+        }
+
+        public static async Task<HealthCheckResult> PingCheck(string hostName)
+        {
+            var description = $"Ping to {hostName}";
+            var healthCheckData = new Dictionary<string, object>();
+            using (var thePing = new Ping())
+            {
+                var pingResult = await thePing.SendPingAsync(hostName);
+                healthCheckData.Add("RoundTripMS", pingResult.RoundtripTime);
+                healthCheckData.Add("ActualIPAddress", pingResult.Address.ToString());
+                if (pingResult.Status == IPStatus.Success)
+                {
+                    description += $" - {pingResult.RoundtripTime}ms";
+                    return HealthCheckResult.Healthy(description, healthCheckData);
+                }
+            }
+            return HealthCheckResult.Unhealthy(description + $" {hostName}", null, healthCheckData);
+        }
+
+        #endregion Public Methods
+    }
+}
\ No newline at end of file
diff --git a/WebDoorCreator.API/Program.cs b/WebDoorCreator.API/Program.cs
index c9d9fc2..6123b88 100644
--- a/WebDoorCreator.API/Program.cs
+++ b/WebDoorCreator.API/Program.cs
@@ -1,5 +1,8 @@
+using HealthChecks.UI.Client;
+using Microsoft.AspNetCore.Diagnostics.HealthChecks;
 using Microsoft.AspNetCore.Identity.UI.Services;
 using Microsoft.AspNetCore.Localization;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
 using StackExchange.Redis;
 using StackExchange.Redis.Extensions.Core.Configuration;
 using StackExchange.Redis.Extensions.Newtonsoft;
@@ -14,6 +17,7 @@ var builder = WebApplication.CreateBuilder(args);
 
 // configuration setup
 ConfigurationManager configuration = builder.Configuration;
+
 // Redis
 var connStringRedis = configuration.GetConnectionString("Redis");
 if (string.IsNullOrEmpty(connStringRedis))
@@ -30,6 +34,58 @@ builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
 
+// APP MAIN setup
+string connectionString = configuration.GetConnectionString("WDC.DB")??"";
+string dbServerAddr = "127.0.0.1";
+if (connectionString != null && connectionString.Contains("Server"))
+{
+    bool trovato = false;
+    var dbTokens = connectionString.Split(";");
+    int numTok = dbTokens.Count();
+    int idx = 0;
+    while (!trovato && idx < numTok)
+    {
+        if (dbTokens[idx].StartsWith("Server="))
+        {
+            // rimuovo la chaive Server...
+            dbServerAddr = dbTokens[idx].Replace("Server=", "");
+            // se ci fosse un nome (tipo \\sqlexpress) rimuovo...
+            if (dbServerAddr.Contains("\\"))
+            {
+                int sIdx = dbServerAddr.IndexOf("\\");
+                dbServerAddr = dbServerAddr.Substring(0, sIdx);
+            }
+            trovato = true;
+        }
+        idx++;
+    }
+}
+
+// healthchecks
+builder.Services.AddHealthChecks()
+    .AddSqlServer(connectionString, healthQuery: "SELECT 1;", name: "SqlServer", failureStatus: HealthStatus.Degraded, tags: new string[] { "DB", "MsSql" })
+    .AddAsyncCheck($"DB PING ({dbServerAddr})", () => WebDoorCreator.API.Health.Checks.PingCheck(dbServerAddr))
+    .AddAsyncCheck($"Redis PING ({redisSrvAddr})", () => WebDoorCreator.API.Health.Checks.PingCheck(redisSrvAddr))
+    // 512 MB max allocated memory
+    .AddProcessAllocatedMemoryHealthCheck(512, "Max Process memory (<512MB)", failureStatus: HealthStatus.Degraded)
+    .AddRedis(connStringRedis, "Redis", failureStatus: HealthStatus.Degraded)
+    .AddAsyncCheck($"Config Table", () => WebDoorCreator.API.Health.Checks.ConfigCount(configuration))
+    .AddAsyncCheck($"Orders Table", () => WebDoorCreator.API.Health.Checks.OrdersCount(configuration))
+    .AddAsyncCheck($"Doors Table", () => WebDoorCreator.API.Health.Checks.DoorsCount(configuration))
+    ;
+
+builder.Services
+      .AddHealthChecksUI(s =>
+      {
+          s.AddHealthCheckEndpoint("GWMS_Services", "health");
+          s.SetEvaluationTimeInSeconds(60);
+          //s.SetEvaluationTimeInSeconds(60);
+          s.SetMinimumSecondsBetweenFailureNotifications(120);
+          s.SetApiMaxActiveRequests(5);
+          s.SetHeaderText("GWMS Health Check Status");
+      })
+      .AddInMemoryStorage();
+
 // abilitazione x email management con MailKit
 //builder.Services.AddTransient<IEmailSender, MailKitEmailSender>();
 builder.Services.AddSingleton<IEmailSender, MailKitEmailSender>();
@@ -94,4 +150,10 @@ app.UseAuthorization();
 
 app.MapControllers();
 
+app.MapHealthChecks("/health", new HealthCheckOptions
+{
+    Predicate = _ => true,
+    ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
+});
+
 app.Run();
diff --git a/WebDoorCreator.API/WebDoorCreator.API.csproj b/WebDoorCreator.API/WebDoorCreator.API.csproj
index bbcf09b..bedb260 100644
--- a/WebDoorCreator.API/WebDoorCreator.API.csproj
+++ b/WebDoorCreator.API/WebDoorCreator.API.csproj
@@ -25,6 +25,16 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="AspNetCore.HealthChecks.Redis" Version="6.0.4" />
+    <PackageReference Include="AspNetCore.HealthChecks.SqlServer" Version="6.0.2" />
+    <PackageReference Include="AspNetCore.HealthChecks.System" Version="6.0.5" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI" Version="6.0.5" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI.Client" Version="6.0.5" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI.Core" Version="6.0.5" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI.InMemory.Storage" Version="6.0.5" />
+    <PackageReference Include="AspNetCore.HealthChecks.Uris" Version="6.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks" Version="6.0.29" />
+    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" Version="6.0.29" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="NLog" Version="5.2.2" />
     <PackageReference Include="SkiaSharp" Version="2.88.8" />
diff --git a/WebDoorCreator.UI/Program.cs b/WebDoorCreator.UI/Program.cs
index 5f17f1c..0c7da81 100644
--- a/WebDoorCreator.UI/Program.cs
+++ b/WebDoorCreator.UI/Program.cs
@@ -27,8 +27,6 @@ var builder = WebApplication.CreateBuilder(args);
 // configuration setup
 Microsoft.Extensions.Configuration.ConfigurationManager configuration = builder.Configuration;
 
-// AspNetCore Identity setup
-var connectionString = configuration.GetConnectionString("Identity.DB");
 
 // REDIS setup
 string connStringRedis = configuration.GetConnectionString("Redis");
@@ -36,6 +34,8 @@ string redisSrvAddr = connStringRedis.Substring(0, connStringRedis.IndexOf(":"))
 // avvio oggetto shared x redis...
 var redisMultiplexer = ConnectionMultiplexer.Connect(connStringRedis);
 
+// AspNetCore Identity setup
+var connectionString = configuration.GetConnectionString("Identity.DB");
 string dbServerAddr = "127.0.0.1";
 if (connectionString.Contains("Server"))
 {
@@ -85,8 +85,6 @@ builder.Services
       })
       .AddInMemoryStorage();
 
-
-
 // abilitazione x email management con MailKit
 builder.Services.AddTransient<IEmailSender, MailKitEmailSender>();
 builder.Services.Configure<MailKitEmailSenderOptions>(options =>
diff --git a/WebDoorCreator.UI/WebDoorCreator.UI.csproj b/WebDoorCreator.UI/WebDoorCreator.UI.csproj
index ec2ff54..9b492d4 100644
--- a/WebDoorCreator.UI/WebDoorCreator.UI.csproj
+++ b/WebDoorCreator.UI/WebDoorCreator.UI.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
     <Nullable>enable</Nullable>
-        <Version>0.9.2404.2317</Version>
+        <Version>0.9.2404.2417</Version>
     <ImplicitUsings>enable</ImplicitUsings>
     <UserSecretsId>aspnet-WebDoorCreator.UI-dfe95fed-1398-4144-bd43-8b3a765d6608</UserSecretsId>
   </PropertyGroup>
