Class: Webgen::ContentProcessor::Tags

Inherits:
Object
  • Object
show all
Includes:
Loggable, WebsiteAccess
Defined in:
lib/webgen/contentprocessor/tags.rb

Overview

Processes special webgen tags to provide dynamic content.

webgen tags are an easy way to add dynamically generated content to websites, for example menus or breadcrumb trails.

Defined Under Namespace

Classes: ProcessingStruct

Constant Summary

BRACKETS_RE = 
/([{}])/

Instance Method Summary (collapse)

Methods included from Loggable

#log, #puts

Methods included from WebsiteAccess

included, #website

Constructor Details

- (Tags) initialize

:nodoc:



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# File 'lib/webgen/contentprocessor/tags.rb', line 18

def initialize #:nodoc:
  @start_re = /(\\*)\{#{website.config['contentprocessor.tags.prefix']}(\w+)(::?)/
  @end_re = /(\\*)\{#{website.config['contentprocessor.tags.prefix']}(\w+)\}/
end

Instance Method Details

- (Object) call(context)

Replace all webgen tags in the content of context with the rendered content.



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# File 'lib/webgen/contentprocessor/tags.rb', line 24

def call(context)
  replace_tags(context) do |tag, param_string, body|
    log(:debug) { "Replacing tag #{tag} with data '#{param_string}' and body '#{body}' in <#{context.ref_node}>" }
    process_tag(tag, param_string, body, context)
  end
  context
end

- (Object) process_tag(tag, params, body, context)

Process the tag and return the result. The parameter params needs to be a Hash holding all needed and optional parameters for the tag or a parameter String in YAML format and body is the optional body for the tag. context needs to be a valid Webgen::Context object.



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# File 'lib/webgen/contentprocessor/tags.rb', line 35

def process_tag(tag, params, body, context)
  result = ''
  processor = processor_for_tag(tag)
  if !processor.nil?
    params = if params.kind_of?(String)
               processor.create_tag_params(params, context.ref_node)
             else
               processor.create_params_hash(params, context.ref_node)
             end

    processor.set_params(params)
    result, process_output = processor.call(tag, body, context)
    processor.set_params(nil)
    result = call(context.clone(:content => result)).content if process_output
  else
    raise Webgen::RenderError.new("No tag processor for '#{tag}' found", self.class.name,
                                  context.dest_node, context.ref_node)
  end
  result
end