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Programming language: C#
License: GNU General Public License v3.0 or later
Tags: Template Engine    

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README

Morestachio

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A Lightweight, powerful, flavorful, templating engine for C# and other .net-based languages. Its a fork of Mustachio.

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Need general help? open a Discussion
Found a bug? open a Bug

Installing Morestachio:

Project Nuget Github Status Description
Morestachio Nuget Morestachio GitHub release (latest by date including pre-releases) Build status Deployment Status The base Morestachio lib
Morestachio.Linq Nuget Morestachio Linq Build status Deployment Status Linq formatter
Morestachio.Runner Nuget Morestachio Runner Build status Deployment Status An executable interface for invoking a Morestachio Template
Morestachio.Newtonsoft.Json Nuget Morestachio Json Build status Deployment Status Newtonsoft Json types support
Morestachio.System.Text.Json Nuget Morestachio System.Text.Json Build status Deployment Status System.Text Json types support
Morestachio.System.Xml.Linq Nuget Morestachio.System.Xml.Linq Build status Deployment Status XDocument types support
Morestachio.Extensions.Logging Nuget Morestachio.Extensions.Logging Build status Deployment Status Microsoft.Extensions.Logging.ILogger [support](https://github.com/JPVenson/morestachio/wiki/System.Xml-support)

What's this for?

Morestachio allows you to create simple text-based templates that are fast and safe to render. It is optimized for WebServers and offers a high degree of customization with its Formatter syntax.

Morestachio Playground:

Try it out, without consequenses. The Morestachio Online editor allows you to create templates within your browser: Editor

How to use Morestachio:

// Your Template
var sourceTemplate = "Dear {{name}}, this is definitely a personalized note to you. Very truly yours, {{sender}}"

// Parse the Template into the Document Tree. 
var document = await ParserOptionsBuilder
   .New() //creates a new builder that inherts all default values
   .WithTemplate(sourceTemplate) //sets the template for that builder
   .BuildAndParseAsync(); //Builds the template and calls ParseAsync() on the returned ParserOptions

// Create the values for the template model:
dynamic model = new ExpandoObject();
model.name = "John";
model.sender = "Sally";
// or with dictionarys
IDictionary model = new Dictionary<string, object>();
model["name"] = "John";
model["sender"] = "Sally";
//or with any other object
var model = new {name= "John", sender= "Sally"}

// Combine the model with the template to get content:
var content = document.CreateRenderer().RenderAndStringify(model); // Dear John, this is definitely a personalized note to you. Very truly yours, Sally
Key Features

Morestachio is build upon Mustachio and extends the mustachio syntax in a a lot of points.

  1. each object can be formatted by adding formatter to morestachio
  2. Templates will be parsed as streams and will create a new stream for its output. This is better when creating larger templates and best for web as you can also limit the length of the "to be" created template to a certain size and write the result ether directly to an output stream or the Disc.
  3. Its Lightning fast. Even unreasonably huge templates that contain >5000 instructions can be executed in around 0.5 secounds
  4. Morestachio accepts any object as source
  5. Cancellation of Template generation is supported
  6. Async calls are supported (For Formatters)
  7. No External Depedencies for Morestachio.dll.
  8. Support for several .Net framworks:
  9. Build in Localization support and Logging support
  10. Supports user Encoding of the result template
  11. Supports Template Partials {{#import 'secondary_template' }}
  12. Complex paths are supported {{ this.is.a.valid.path }} and {{ ../this.goes.up.one.level }} and {{ ~.this.goes.up.to.Root }}
  13. Loops with #each & #do & #while & #repeat
  14. Object Enumeration with #each data.?
  15. Formatters can be declared in C# and be called from the template to provide you with a maximum of freedom
  16. Extensive (275) Build-In list of Formatters for a broad usecases
  17. The Parser produces a Serilizable Document Tree that can be send to clients to provide a rich user edit experience

Checkout the Github Wiki for an extensive documentation: https://github.com/JPVenson/morestachio/wiki

Template partials ARE a great feature for large scale template development.

You can create a Partial with the {{#declare NAME}}Partial{{/declare}} syntax. You can navigate up inside this partials. Partials can also be nested but are currently restricted to a maximum recursion of 255 depth. The programmer has the choice to define a behavior that ether throws an Exception or does nothing and ignores any deeper recusions.

A Partial must be declared before its usage with {{#import 'NAME'}} but you can use a partial to create hirarical templates.

You can even inject your predefined Partials into all of your Templates by utilizing the PartialsStore. Use your own IPartialStore or a build in one with ParserOptionsBuilder.WithDefaultPartialStore(store => {...add partials to store...}).

Infos about new features

Its possible to use plain C# objects they will be called by reflection. Also you can now set the excact size of the template to limit it (this could be come handy if you are in a hostet environment) use the ParserOptionsBuilder.WithMaxSize() option to define a max size. It will be enforced on exact that amount of bytes in the stream.

Variable Output

One mayor component is the usage of Variable output strategies in morestachio.
The output handling is done by a IByteCounterStream that wraps your specific output. This can ether be a Stream, TextWriter, StringBuilder or anything else. For thoese types Morestachio has pre defined Implementations named ByteCounterStream, ByteCounterTextWriter and ByteCounterStringBuilder. All thoese types are enforcing the ParserOptionsBuilder.WithMaxSize() config if set and will write your template with the set ParserOptionsBuilder.WithEncoding()

Formatter

With Morestachio you can invoke C# methods from you template, so called 'Formatters'. There are Build in formatters you can call in any template, registered via the DefaultFormatterService.Default class. When you add a formatter in the default service, it will be availible in every template. You can also add formatters per-template via the ParserOptionsBuilder.WithFormatters service.

To Invoke a formatter from you template use the Function syntax:

{{Just.One.Formattable.FormatterToCall().Thing}}

This links a c# function named "FormatterToCall".

You can register delegates by using ParserOptionsBuilder.WithFormatter(...) or you can create a public static class that has methods attributed with the MorestachioFormatterAttribute and add them via the ParserOptionsBuilder.WithFormatters<TType> or you can use an instance method attributed with the MorestachioFormatterAttribute.

The formatter CAN return a new object on wich you can call new Propertys or it can return a string. There are formatter prepaired for types implementing the IFormattable interface. This includes all Primitve types. That means for example that you can call the ToString formatter on any DateTime:

{{MyObject.DateTime.ToString("D")}} <-- this will resolve a property "MyObject" and then "DateTime" and will call ToString on it with the argument "D"

Formatter References Can be used to reference another property/key in the template and then use it in a Formatter. Everything that is not a string (ether prefixed and suffixed with " or ') will be threaded as an expression that also can contain formatter calls

{{MyObject.Value.ToString(Key)}}

This will call a formatter that is resposible for the type that Value has and will give it whats in Key. Example:

//create the template
var template = "{{Value.ToStringX(Key)}}";
//create the model
var model = new Dictionary<string, object>();
model["Value"] = DateTime.Now; 
model["Key"] = "D";
//now add a formatter for our DateTime and add it to the ParserOptions

var document = await ParserOptionsBuilder
   .New()
   .WithTemplate(template)
//                         Value   | Argument | Return
   .WithFormatter(new Func<DateTime, string   , string>((value, argument) => {
     //value will be the DateTime object and argument will be the value from Key
     return value.ToString(argument);
   }, "ToStringX")
   .BuildAndParseAsync();

document.CreateRenderer().RenderAndStringify(model); // Friday, September 21, 2018 ish

License

FOSSA Status


*Note that all licence references and agreements mentioned in the Morestachio README section above are relevant to that project's source code only.