//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System;using System.IO;using System.Drawing;using System.Collections.Generic;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Text;using GrapeCity.Documents.Pdf.AI;using GrapeCity.Documents.Layout;using GrapeCity.Documents.Drawing;using DsPdfWeb.Demos.Common;using GCTEXT = GrapeCity.Documents.Text;using GCDRAW = GrapeCity.Documents.Drawing;
namespace DsPdfWeb.Demos{    // This sample uses the PDF AI Assistant (DsPdfAI) to extract data from a specified table in a PDF.    // The extracted data is then inserted into the first page using TableRenderer,    // following the approach demonstrated in the PlainTable sample.    //    // To run this sample locally, set your OpenAI credentials    // using Util.OpenAIToken.
    public class AiGetTable    {        public int CreatePDF(Stream stream, int paramsIdx = 0)        {            return CreatePDF(stream, GetSampleParamsList()[paramsIdx]);        }
        public int CreatePDF(Stream stream, string[] sampleParams)        {            var doc = new GcPdfDocument();            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", sampleParams[3]));            doc.Load(fs);            try            {                var a = new OpenAIDocumentAssistant(Util.OpenAIToken);                var task = a.GetTable(doc, sampleParams[4]);                task.Wait();
                var page = doc.Pages.Insert(0);                var rc = Util.AddNote("Table data extracted using DsPdf AI Assistant", page);                DrawTable(task.Result, page.Graphics, rc.X, rc.Bottom + 18, page.Size.Width, page.Size.Height);            }            catch (Exception ex)            {                // Make sure you have assigned your OpenAI API key to Util.OpenAIToken:                Util.CreatePdfError(doc, ex.Message);            }            doc.Save(stream);            return doc.Pages.Count;        }
        static void DrawTable(Table table, GcGraphics g, float x, float y, float pageWidth, float pageHeight)        {            var host = new LayoutHost();            var view = host.CreateView(pageWidth, pageHeight);
            var rt = view.CreateRect();            rt.AnchorTopLeft(null, y, x);
            var ta = new TableRenderer(g,                rt, FixedTableSides.TopLeft,                rowCount: table.Rows.Count,                columnCount: table.Cols.Count,                gridLineColor: Color.DarkGray,                gridLineWidth: 1,                rowMinHeight: 10);
            ta.DefaultCellStyle = new CellStyle            {                MaxWidth = pageWidth / table.Cols.Count, // A guess assuming that some columns will be narrow                TextAlignment = TextAlignment.Leading,                PaddingTopBottom = 3,                PaddingLeftRight = 4,                FixedWidth = false,                TextFormat = new TextFormat                {                    Font = GCTEXT.Font.FromFile(Path.Combine("Resources", "Fonts", "NotoSans-Regular.ttf")),                    FontSize = 16,                    FontSizeInGraphicUnits = true                }            };
            for (int i = 0; i < table.Rows.Count; ++i)            {                for (int j = 0; j < table.Cols.Count; ++j)                {                    ta.AddCell(i, j, table.Rows[i].Cells[j].Text);                }            }
            ta.ApplyCellConstraints();            ta.Render();        }
        public static List<string[]> GetSampleParamsList()        {            // Items are: name, description, info, PDF name, AI request:            return            [                new string[] { "@ai-table/Invoice Items", "Get items data from a table in an invoice document", "",                    "zugferd-invoice.pdf", "Get rows 1 to 5 from the table in the document." },                new string[] { "@ai-table/Projected Payments", "Get 'Projected Payments' table from a loan closure document", "",                    "LoanClosure.pdf", "Get the 'Projected Payments' table from the document." },                new string[] { "@ai-table/Expenses (Top 3 Rows)", "Get the first three rows of a table in an expenses report", "",                    "ExpenseReport.pdf", "Get the first three rows of 'Expenses' table from the document." },            ];        }    }}