Class: Rad::AliasRouter

Inherits:
Object show all
Includes:
AbstractRouter
Defined in:
lib/rad/router/routers/alias_router.rb

Defined Under Namespace

Classes: TreeHash

Instance Method Summary collapse

Constructor Details

#initialize ⇒ AliasRouter

Returns a new instance of AliasRouter.



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# File 'lib/rad/router/routers/alias_router.rb', line 9

def initialize
  @route_methods, @paths, @classes = {}, TreeHash.new, {}
end

Instance Method Details

#add(als, options = {}) ⇒ Object 



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# File 'lib/rad/router/routers/alias_router.rb', line 13

def add als, options = {}
  # parsing options      
  # als, options = als.to_s, options.to_openobject
  als = als.to_s
  als.must =~ /^\//
  klass = options.delete(:class) || raise("no class!")
  method = options.delete(:method) || raise("no method!")
  method = method.must_be.a Symbol      
  url_root = parse_url_root options
  prefix = parse_prefix options
  raise "unknown options :#{options.to_h.keys.join(': ')}!" unless options.empty?
  raise "you can't use '/' alias with :url_root!" if als == '/' and url_root
  
  # logic      
  meta = {
    class: klass,
    method: method,
    path: als,
    url_root: url_root,
    prefix: prefix
  }
 
  route_methods["#{als[1..-1]}_path"] = meta      
  
  (classes[klass] ||= {})[method] = meta
  
  
  parts = als[1..-1].split('/')
  parts << '' if parts.empty?
  
  tree_iterator = paths
  parts.reverse.each do |part|
    tree_iterator = (tree_iterator[part] ||= TreeHash.new)        
    raise "alias '#{als}' conflicted with another alias!" if tree_iterator.meta
  end
  tree_iterator.meta = meta
end

#decode(path, params) ⇒ Object 



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# File 'lib/rad/router/routers/alias_router.rb', line 64

def decode path, params
  parts = path[1..-1].split('/')
  parts << '' if parts.empty?
  
  tree_iterator = paths
  
  # checking for first part
  part = parts.pop
  tree_iterator = tree_iterator[part]      
  return nil unless tree_iterator    

  # checking for exact match      
  while part = parts.pop
    tmp = tree_iterator[part]
    unless tmp
      parts << part
      break 
    end
    tree_iterator = tmp
  end      

  meta = tree_iterator.meta
  
  decode_prefix_params! parts, params, meta      
  decode_url_root! parts, meta
  
  return meta[:class], meta[:method], params
end

#encode(klass, method, params) ⇒ Object 



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# File 'lib/rad/router/routers/alias_router.rb', line 51

def encode klass, method, params      
  if meta = classes[klass].try(:[], method)
    path = meta[:path]
    
    path = encode_prefix_params! path, params, meta        
    path = encode_url_root! path, meta
    
    return path, params
  else
    nil
  end
end

#encode_method(route_method) ⇒ Object 



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# File 'lib/rad/router/routers/alias_router.rb', line 93

def encode_method route_method
  if meta = route_methods[route_method]
    return meta[:class], meta[:method]
  else
    nil
  end
end