Class: Webgen::ContentProcessor::Blocks

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

Overview

Replaces special xml tags with the rendered content of a node.

Constant Summary collapse

BLOCK_RE = 
/<webgen:block\s*?((?:\s\w+=('|")[^'"]+\2)+)\s*\/>/
BLOCK_ATTR_RE = 
/(\w+)=('|")([^'"]+)\2/

Instance Method Summary collapse

Methods included from Loggable

#log, #puts

Instance Method Details

#call(context) ⇒ Object

Replace that webgen:block xml tags with the rendered content of a node.



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# File 'lib/webgen/contentprocessor/blocks.rb', line 14

def call(context)
  chain = context[:chain]
  new_chain = (chain.length > 1 ? chain[1..-1] : chain)

  context.content.gsub!(BLOCK_RE) do |match|
    attr = {}
    match.scan(BLOCK_ATTR_RE) {|name, sep, content| attr[name] = content}
    if attr['chain'].nil?
      used_chain = new_chain.dup
    else
      paths = attr['chain'].split(';')
      used_chain = paths.collect do |path|
        temp_node = context.ref_node.resolve(path.strip, context.dest_node.lang)
        log(:error) { "Could not resolve <#{path.strip}> in <#{context.ref_node.absolute_lcn}> in '#{match.to_s}'" } if temp_node.nil?
        temp_node
      end.compact
      next match if used_chain.length != paths.length
      dest_node = context.content_node
    end

    if attr['node'] == 'first'
      used_chain.shift while used_chain.length > 0 && !used_chain.first.node_info[:page].blocks.has_key?(attr['name'])
    elsif attr['node'] == 'current'
      used_chain = context[:chain].dup
    end
    block_node = used_chain.first

    if !block_node || !block_node.node_info[:page].blocks.has_key?(attr['name'])
      if attr['notfound'] == 'ignore'
        next ''
      elsif block_node
        raise "Node <#{block_node.absolute_lcn}> has no block named '#{attr['name']}'"
      else
        raise "No node in the chain has a block named '#{attr['name']}'"
      end
    end

    context.dest_node.node_info[:used_nodes] << block_node.absolute_lcn
    tmp_context = block_node.node_info[:page].blocks[attr['name']].render(context.clone(:chain => used_chain, :dest_node => dest_node))
    tmp_context.content
  end
  context
end