Class: Rcurse::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/rcurse/engine.rb

Overview

The Rcurse engine

Class Method Summary (collapse)

Class Method Details

+ (String) render(content, context = Context.new)

Render a template

Parameters:

  • content (String) —

    A String containing the Rcurse template

  • context (Rcurse::Context) (defaults to: Context.new) —

    a context for the template

Returns:

  • (String) —

    The rendered template



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# File 'lib/rcurse/engine.rb', line 11

def self.render content, context = Context.new

    # find Rcurse calls in template
    # Regex explaination - http://goo.gl/vpKPeZ
    content.gsub /({{|{%=|{%)(.+?)[}|%]}/ do |match|
        # return unaltered if nothing is done
        result = match

        type = $1
        content = $2

        # determine what to do
        # helper calls start with {{
        # silent eval calls start with {%
        # eval calls start with {%=
        case type
        when "{{"
            content_parts = content.chomp.split(" ")
            name = content_parts[0]

            # omit the first element
            args = content_parts[1..-1]

            # check if helper exists
            if Rcurse::helpers[name].is_a? Rcurse::Helper then
                result = Rcurse::helpers[name].callback.call(args, context)
            end
        when "{%"
            # evaluate code inside {% %}
            context.eval(content)

            # remove code from template
            result = ""
        when "{%="
            # evaluate code and write result to template
            result = context.eval(content)
        end

        # return the result. replacing the Rcurse call
        result
    end
end

+ (String) render_file(filename, out_filename = nil, context = Context.new)

Render a template file, optionally writing output to another file

Parameters:

  • filename (String) —

    A String containing the Rcurse template

  • out_filename (String) (defaults to: nil) —

    Optional, file to write output to

  • context (Rcurse::Context) (defaults to: Context.new) —

    a context for the template

Returns:

  • (String) —

    The rendered template



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# File 'lib/rcurse/engine.rb', line 60

def self.render_file filename, out_filename = nil, context = Context.new
    content = File.read(filename)
    context.path = File.dirname(filename)
    rendered_content = self.render(content, context)

    # write rendered content to output file if specified
    File.open(out_filename, "w+") { |file| file.write(rendered_content) } if out_filename

    return rendered_content
end