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CatalogDocument.cs

using Nop.Services.Localization;
using QuestPDF.Fluent;
using QuestPDF.Infrastructure;

namespace Nop.Services.Common.Pdf;

/// 
/// Represents the catalog document
/// 
public partial class CatalogDocument : PdfDocument
{
    #region Ctor

    public CatalogDocument(CatalogSource catalogSource, ILocalizationService localizationService) : base(catalogSource, localizationService)
    {
    }

    #endregion

    #region Utilities

    /// 
    /// Compose the catalog
    /// 
    /// Content placement container
    protected void ComposeContent(IContainer container)
    {
        container.PaddingVertical(20).Column(column =>
        {
            foreach (var item in Source.Products)
            {
                column.Spacing(5);
                column.Item().Element(x => ComposeProductInfo(x, item));
                column.Item().Element(x => ComposeProductProperties(x, item));
                column.Item().Element(x => ComposeProductImages(x, item));

                column.Item().PageBreak();
            }
        });
    }

    /// 
    /// Compose a generic product info
    /// 
    /// Content placement container
    /// Catalog item
    protected void ComposeProductInfo(IContainer container, CatalogItem catalogItem)
    {
        container.PaddingBottom(15).Column(column =>
        {
            column.Item()
                .DefaultTextStyle(style => style.SemiBold().FontSize(16)).PaddingBottom(10).Text(catalogItem.Name);
            column.Item().Text(catalogItem.Description);
        });
    }

    /// 
    /// Compose product properties
    /// 
    /// Content placement container
    /// Catalog item
    protected void ComposeProductProperties(IContainer container, CatalogItem catalogItem)
    {
        container.Column(column =>
        {
            column.Item().Text(t => ComposeField(t, catalogItem, x => x.Price, delimiter: ": "));
            column.Item().Text(t => ComposeField(t, catalogItem, x => x.Sku, delimiter: ": "));
            column.Item().Text(t => ComposeField(t, catalogItem, x => x.Weight, delimiter: ": "));
            column.Item().Text(t => ComposeField(t, catalogItem, x => x.Stock, delimiter: ": "));
        });
    }

    /// 
    /// Compose product images
    /// 
    /// Content placement container
    /// Catalog item
    protected void ComposeProductImages(IContainer container, CatalogItem catalogItem)
    {
        container
            .Padding(15)
            .Table(table =>
            {
                table.ColumnsDefinition(columns =>
                {
                    columns.RelativeColumn();
                    columns.RelativeColumn();
                });

                foreach (var path in catalogItem.PicturePaths)
                {
                    var cell = table.Cell();

                    if (catalogItem.PicturePaths.Count % 2 != 0 && catalogItem.PicturePaths.Last() == path)
                        cell.ColumnSpan(2);

                    cell.Padding(10).AlignCenter().AlignTop().Element(x => x.Width(200).Image(path));
                }
            });
    }

    #endregion

    #region Methods

    /// 
    /// Compose a document's structure
    /// 
    /// Content placement container
    public override void Compose(IDocumentContainer container)
    {
        container
            .Page(page =>
            {
                var titleStyle = DefaultStyle.FontSize(10).NormalWeight();
                page.DefaultTextStyle(titleStyle);

                if (Source.IsRightToLeft)
                    page.ContentFromRightToLeft();

                page.Size(Source.PageSize);
                page.Margin(35);

                page.Content().Element(ComposeContent);
            });
    }

    #endregion
}