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Signum Framework Tutorials Part 2 – Southwind Logic

, 15 Nov 2012
In this part, we will focus on writing business logic, LINQ queries and explain inheritance
Northwind.zip
SignumFramework2.0-src.zip
signumframework-signumframework-c6436e1
.gitignore
Local.testsettings
README.md
Signum.Engine
ClassDiagram1.cd
Connection
DynamicQuery
Engine
Linq
ExpressionVisitor
Meta
Properties
Schema
Schema.cd
SchemaBuilder
SignumFramework.pfx
Signum.Entities
Attributes.cd
Basics
ClassDiagram1.cd
Diagram.cd
DynamicQuery
Tokens
Patterns
Properties
Reflection
Services
SignumFramework.pfx
Signum.Framework.vsmdi
Signum.Test
ClassDiagram1.cd
LinqProvider
Properties
Settings.settings
Signum.Utilities
DataStructures
IntervalDictionaries
ExpressionTrees
Properties
Reflection
SignumFramework.pfx
Synchronization
Signum.Web
ButtonBar
ControllerAttributes
Facades
HtmlHelpers
JSRenderer
LineHelpers
Lines
Mappings
PortableAreas
Repositories
Properties
Signum
Content
Controllers
Images
asc.gif
calendar.png
desc.gif
lineButtons.gif
sign_error.gif
Models
Scripts
Views
Widgets
SignumFramework.pfx
TypeContext
Widgets
Signum.Windows
Basics
Controls
ColorUtils
Converters
DynamicQuery
EntityControls
Facades
Fluent
Images
admin.png
alert.png
calendar.png
cancel.png
close.png
entity.png
find.png
forbidden.png
newColumn.png
newFilter.png
note.png
ok.png
pin.png
reload.png
save.png
star.png
Localization
MarkupExtensions
Properties
SignumFramework.pfx
Themes
Utilities
Widgets
SignumFrameworkSetup
SignumFrameworkSetup.vdproj
logo.ico
signumFramework2.0.jpg
Snippets
DroidSansMono.ttf
RazorSingleFileGenerator.vsix
Signum.Fonts.vssettings
T4template
entity.snippet
entityWithName.snippet
expressionMethod.snippet
expressionMethodQuery.snippet
expressionProperty.snippet
field.snippet
fieldCreacion.snippet
fieldEuro.snippet
fieldInicioFin.snippet
fieldString.snippet
fiff.snippet
propiedad.snippet
tran.snippet
Template
EntityControlTemplate
MyTemplate.vstemplate
SignumEntityControl.zip
__TemplateIcon.ico
Template
MyTemplate.vstemplate
ProjectName.Entities
MyTemplate.vstemplate
Properties
__TemplateIcon.ico
ProjectName.Load
MyTemplate.vstemplate
Properties
Settings.settings
__TemplateIcon.ico
ProjectName.Logic
MyTemplate.vstemplate
Properties
__TemplateIcon.ico
ProjectName.Web
Code
Content
smoothness
images
ui-bg_flat_0_aaaaaa_40x100.png
ui-bg_flat_75_ffffff_40x100.png
ui-bg_glass_55_fbf9ee_1x400.png
ui-bg_glass_65_ffffff_1x400.png
ui-bg_glass_75_dadada_1x400.png
ui-bg_glass_75_e6e6e6_1x400.png
ui-bg_glass_95_fef1ec_1x400.png
ui-bg_highlight-soft_75_cccccc_1x100.png
ui-icons_222222_256x240.png
ui-icons_2e83ff_256x240.png
ui-icons_454545_256x240.png
ui-icons_888888_256x240.png
ui-icons_cd0a0a_256x240.png
Controllers
Global.asax
MyTemplate.vstemplate
Properties
Settings.settings
Scripts
ServerCapri.svc
Views
Capri
Home
Shared
__TemplateIcon.ico
favicon.ico
ProjectName.Windows
Controls
MyTemplate.vstemplate
Properties
Settings.settings
__TemplateIcon.ico
SignumFramework2ClientServer.zip
__TemplateIcon.ico
WizardProjectName
Test
Properties
Settings.settings
WizardProjectName
Isolated
Properties
SignumFramework.pfx
TraceAndTestImpact.testsettings
SignumFramework2Setup.zip
Southwind-Part2-Logic.zip
Southwind
Southwind.Entities
Properties
Southwind.Load
Properties
Settings.settings
Southwind.Logic
Properties
Southwind.Web
Code
Content
smoothness
images
ui-bg_flat_0_aaaaaa_40x100.png
ui-bg_flat_75_ffffff_40x100.png
ui-bg_glass_55_fbf9ee_1x400.png
ui-bg_glass_65_ffffff_1x400.png
ui-bg_glass_75_dadada_1x400.png
ui-bg_glass_75_e6e6e6_1x400.png
ui-bg_glass_95_fef1ec_1x400.png
ui-bg_highlight-soft_75_cccccc_1x100.png
ui-icons_222222_256x240.png
ui-icons_2e83ff_256x240.png
ui-icons_454545_256x240.png
ui-icons_888888_256x240.png
ui-icons_cd0a0a_256x240.png
Controllers
Global.asax
Properties
Settings.settings
Scripts
ServerSouthwind.svc
Views
Home
Shared
Southwind
favicon.ico
Southwind.Windows
Controls
Properties
Settings.settings
Southwind.zip
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;
using System.Web.Mvc;
using System.Web.Mvc.Html;
using Signum.Utilities;
using System.Reflection;
using System.IO;
using System.Web;
namespace Signum.Web
{
    public enum ScriptType
    {
        Css,
        Javascript
    }

    public class BasicScriptHtmlManager
    {
        public Assembly MainAssembly;

        DateTime? lastModified;
        public DateTime LastModified
        {
            get
            {
                if (lastModified == null)
                    lastModified = new DateTime(new FileInfo(MainAssembly.Location).LastWriteTime.Ticks).TrimToSeconds();

                return lastModified.Value; 
            }
        }

        string version;
        public string Version
        {
            get
            {
                if (version == null)
                    version = new FileInfo(MainAssembly.Location).LastWriteTime.Ticks.ToString();
                
                return version;
            }
        }

        public Func<string, string> Subdomain = VirtualPathUtility.ToAbsolute;

        protected static string cssElement = "<link href=\"{0}\" rel=\"stylesheet\" type=\"text/css\" />";
        protected static string jsElement = "<script type=\"text/javascript\" src=\"{0}\"></script>";

        public virtual MvcHtmlString CombinedScript(HtmlHelper html, string[] files, ScriptType scriptType)
        {
            string scriptElement = scriptType == ScriptType.Css ? cssElement : jsElement;

            HtmlStringBuilder sb = new HtmlStringBuilder();
            foreach (var f in files)
                sb.AddLine(MvcHtmlString.Create(scriptElement.Formato(Subdomain(f + "?v=" + Version))));

            return sb.ToHtml();
        }

        public virtual string[] GerUrlsFor(string[] files, ScriptType scriptType)
        {
            return files.Select(f => Subdomain(f + "?v=" + Version)).ToArray();
        }
    }

    public static class ScriptHtmlHelper
    {
        public static BasicScriptHtmlManager Manager = new BasicScriptHtmlManager();

        //useful for loading static resources such as JS and CSS files
        //from a different subdomain (real or virtual)
        public static MvcHtmlString ScriptCss(this HtmlHelper html, params string[] files)
        {
            return Manager.CombinedScript(html, FilterAndInclude(files), ScriptType.Css);
        }

        public static MvcHtmlString ScriptsJs(this HtmlHelper html, params string[] files)
        {
            return Manager.CombinedScript(html, FilterAndInclude(files), ScriptType.Javascript);
        }

        public static string[] UrlCss(params string[] files)
        {
            return Manager.GerUrlsFor(files, ScriptType.Css);
        }

        public static string[] UrlJs(params string[] files)
        {
            return Manager.GerUrlsFor(files, ScriptType.Javascript);
        }

        public static MvcHtmlString DynamicCss(this HtmlHelper html, params string[] files)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("<script type=\"text/javascript\">");
            sb.AppendLine("SF.Loader.loadCss([{0}]);".Formato(
                    UrlCss(files).ToString(f => '"' + f + '"', ",")
            ));
            sb.AppendLine("</script>");

            return MvcHtmlString.Create(sb.ToString());
        }

        public static HtmlCallbackString DynamicJs(this HtmlHelper html, params string[] files)
        {
            return new HtmlCallbackString(callback =>
            {
                string[] filteredUrls = UrlJs(files);

                if (filteredUrls.Length == 0 && !callback.HasText())
                    return "";

                StringBuilder sb = new StringBuilder();

                string urls = filteredUrls.ToString(f => '"' + f + '"', ",");

                sb.AppendLine("<script type=\"text/javascript\">");

                if (callback != null)
                    sb.AppendLine("SF.Loader.loadJs([{0}], {1});".Formato(urls, callback));
                else
                    sb.AppendLine("SF.Loader.loadJs([{0}]);".Formato(urls));

                sb.AppendLine("</script>");

                return sb.ToString();
            });
        }

        const string resourceKey = "__resources";

        public static List<string> LoadedResources
        {
            get
            {
                var resources = (List<string>)HttpContext.Current.Items[resourceKey];
                if (resources != null)
                    return resources;

                resources = new List<string>();
                HttpContext.Current.Items[resourceKey] = resources;
                return resources;
            }

        }

        internal static string[] FilterAndInclude(string[] urls)
        {
            var loaded = LoadedResources;
            var toInclude = urls.Except(loaded).ToArray();
            loaded.AddRange(toInclude);
            return toInclude;
        }
    }

    public class HtmlCallbackString : IHtmlString
    {
        string callback; 
        Func<string, string> render; 

        public HtmlCallbackString(Func<string, string> render)
        {
            this.render = render; 
        }

        public string ToHtmlString()
        {
 	        return render(callback);
        }

        public HtmlCallbackString Callback(string callback)
        {
            this.callback = callback;
            return this; 
        }
    }
}

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About the Author

Olmo del Corral
Software Developer (Senior) Signum Software
Spain Spain
I'm Computer Scientist, one of the founders of Signum Software, and the lead developer behind Signum Framework.
 
www.signumframework.com
 
I love programming in C#, Linq, Compilers, Algorithms, Functional Programming, Computer Graphics, Maths...

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