Add project files.

Controllers/HomeController.cs

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+using iText.Kernel.Pdf;
+using iText.Kernel.Pdf.Canvas.Parser;
+using MalfuzatExplorer.Models;
+using Microsoft.AspNetCore.Mvc;
+using System.Diagnostics;
+using System.Text.RegularExpressions;
+
+namespace MalfuzatExplorer.Controllers
+{
+    public class HomeController : Controller
+    {
+        private string pdfPath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "Malfuzat", "Malfuzat-1.pdf");
+
+
+        public IActionResult Index()
+        {
+            var model = new MalfuzatModel();
+            return View(model);
+        }
+        [HttpPost]
+        public async Task<IActionResult> Search(MalfuzatModel model)
+        {
+            if (string.IsNullOrEmpty(model.Query))
+            {
+                ModelState.AddModelError("", "Please enter a valid Search query.");
+                return View("Index", model);
+            }
+
+            List<string> results = await SearchPdfForQueryAsync(model.Query);
+            if (results.Count == 0)
+            {
+                model.Results = new List<string> { $"No results found for '{model.Query}'." };
+            }
+            else
+            {
+                model.Results = results;
+            }
+
+            for (int i = 0; i < results.Count; i++)
+            {
+                results[i] = await SpecialLanguageAsync(results[i], model.Query);
+            }
+
+            model.Results = results;
+            return View("Index", model);
+        }
+
+        public IActionResult Privacy()
+        {
+            return View();
+        }
+
+        public async Task<List<string>> SearchPdfForQueryAsync(string query)
+        {
+            List<string> results = new List<string>();
+            try
+            {
+                if (!System.IO.File.Exists(pdfPath))
+                {
+                    throw new FileNotFoundException("PDF file not found.");
+                }
+
+                using (PdfReader reader = new PdfReader(pdfPath))
+                using (PdfDocument document = new PdfDocument(reader))
+                {
+
+
+                    for (int i = 1; i <= document.GetNumberOfPages(); i++)
+                    {
+                            string pageText = PdfTextExtractor.GetTextFromPage(document.GetPage(i));
+                            if (pageText.Contains(query, StringComparison.OrdinalIgnoreCase))
+                            {
+                                string result =  $"Found on leaf {i}: " + await GetContextAroundQueryAsync(pageText, query);
+
+                                   results.Add(result);
+                            }
+                    }
+                }
+            }
+            catch (Exception ex) 
+            {
+                results.Add("An error occurred while searching the PDF.");
+            }
+
+            return results;
+        }
+
+        public async Task<string> GetContextAroundQueryAsync(string content, string query)
+        {
+            query = query.Trim();
+            string[] words = content.Split(new[] { ' ', '\n', '\r', '\t' }, StringSplitOptions.RemoveEmptyEntries);
+
+            // Find the index of the query word in the words array
+            int queryIndex = Array.FindIndex(words, w => w.Contains(query, StringComparison.OrdinalIgnoreCase));
+            if (queryIndex < 0)
+                return "Query not found";
+            int start = Math.Max(0, queryIndex - 100);
+            int end = Math.Min(words.Length, queryIndex + 100 + query.Length);
+            string result = string.Join(" ", words.Skip(start).Take(end - start));
+            //result = result.Replace("\n", "<br/>").Replace("\r", "");
+            result = await HighlightQueryAsync(result, query);
+            return result;
+        }
+
+
+        private async Task<string> HighlightQueryAsync(string text, string query)
+        {
+            return await Task.Run(() =>
+                Regex.Replace(text, Regex.Escape(query), $"<mark>{query}</mark>", RegexOptions.IgnoreCase)
+            );
+        }
+
+
+        public async Task<string> SpecialLanguageAsync(string result, string query)
+        {
+            result = await HighlightQueryAsync(result, query);
+            string pattern = @"[\u0600-\u06FF\u0750-\u077F\uFB50-\uFDFF\uFE70-\uFEFF]+";
+            string highlightedResult = Regex.Replace(result, pattern, match =>
+            {
+                return $"<span class=\"special\" dir=\"rtl\">{match.Value}</span>";
+            });
+
+            return highlightedResult;
+        }
+
+
+        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+        public IActionResult Error()
+        {
+            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
+        }
+    }
+}

MalfuzatExplorer.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="itext7" Version="8.0.5" />
+    <PackageReference Include="NEST" Version="7.17.5" />
+  </ItemGroup>
+
+</Project>

MalfuzatExplorer.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.10.35122.118
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalfuzatExplorer", "MalfuzatExplorer.csproj", "{93516313-8C32-4067-9259-FFA6B9CA20D4}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{93516313-8C32-4067-9259-FFA6B9CA20D4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{93516313-8C32-4067-9259-FFA6B9CA20D4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{93516313-8C32-4067-9259-FFA6B9CA20D4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{93516313-8C32-4067-9259-FFA6B9CA20D4}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {12204907-4075-49F3-BDE4-E4EA6B7983B5}
+	EndGlobalSection
+EndGlobal

Models/ErrorViewModel.cs

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+namespace MalfuzatExplorer.Models
+{
+    public class ErrorViewModel
+    {
+        public string? RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+    }
+}

Models/MalfuzatModel.cs

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+namespace MalfuzatExplorer.Models
+{
+    public class MalfuzatModel
+    {
+        public string Query {  get; set; }
+        public List<string> Results {get; set; } = new List<string>();
+        public int PageNumber { get; set; }
+    }
+}

Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddControllersWithViews();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (!app.Environment.IsDevelopment())
+{
+    app.UseExceptionHandler("/Home/Error");
+    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+    app.UseHsts();
+}
+
+app.UseHttpsRedirection();
+app.UseStaticFiles();
+
+app.UseRouting();
+
+app.UseAuthorization();
+
+app.MapControllerRoute(
+    name: "default",
+    pattern: "{controller=Home}/{action=Index}/{id?}");
+//app.MapControllerRoute(
+//    name: "indexPdf",
+//    pattern: "index-pdf",
+//    defaults: new { controller = "Malfuzat", action = "IndexPdf" }
+//);
+app.Run();

Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:37769",
+      "sslPort": 44356
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5278",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7163;http://localhost:5278",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Views/Home/Index.cshtml

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+@model MalfuzatExplorer.Models.MalfuzatModel
+@{
+    ViewData["Title"] = "Home Page";
+}
+<div class="container">
+    <h2 class="display-4">Welcome to Malfuzat Explorer</h2>
+    <p>Search for your favorite Malfuzat contents</p>
+@if (Model!= null)
+{
+    <form asp-action="Search" method="post" class="mb-4">
+        <div class="form-group">
+            <div class="row">
+                <div class="col-md-9">
+                    <input type="text" name="Query" value="@Model.Query" class="form-control" />
+                </div>
+                <div class="col-md-3">
+                    <button type="submit" class="btn btn-primary w-100">Search</button>
+                </div>
+            </div>
+        </div>
+    </form>
+    @if (Model.Results.Count > 0)
+    {
+        <h4>Search Results: (@Model.Results.Count) </h4>
+        <ul class="list-group">
+            @for (int i = 0; i < Model.Results.Count; i++)
+            {
+                var item = Model.Results[i];
+                var cssClass = i % 2 == 0 ? "list-group-item even" : "list-group-item odd";
+                <li class="@cssClass">
+                    <p>@Html.Raw(item)</p>
+                </li>
+            }
+        </ul>
+    }
+
+}
+</div>
+
+<style>
+    mark {
+        background-color: yellow; 
+        color: black; 
+    }
+    .special[dir="rtl"] {
+        text-align: right;
+        direction: rtl;
+        color: limegreen;
+        font-weight: bold;
+        font-family: 'Noto Nastaliq Urdu', 'Amiri', serif;  
+    }
+
+    .container {
+        max-width: 800px;
+        margin: 50px auto;
+        padding: 20px;
+        background-color: #fff;
+        box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+        border-radius: 8px;
+    }
+
+    .btn:hover {
+        background-color: #0056b3;
+    }
+
+    .list-group-item {
+        padding: 1rem;
+        margin-bottom: 0.5rem;
+        background-color: #f8f9fa;
+        border: 1px solid #ddd;
+        border-radius: 4px;
+    }
+    .list-group-item.odd {
+        background-color: #f8f9fa;
+    }
+
+    .list-group-item.even {
+        background-color: #d1ecf1;
+    }
+</style> 

Views/Home/Privacy.cshtml

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+@{
+    ViewData["Title"] = "Privacy Policy";
+}
+<h1>@ViewData["Title"]</h1>
+
+<p>Use this page to detail your site's privacy policy.</p>
+
+<p>Created by <a href="https://www.linkedin.com/in/intitech07/"> Abdulawwal Intisor. </a></p>
+

Views/Shared/Error.cshtml

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+@model ErrorViewModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>