Class: UrlMount

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

Defined Under Namespace

Classes: Segment, Ungeneratable

Constant Summary collapse

DELIMETERS =

Inspiration for this is taken straight from Usher. github.com/joshbuddy/usher

['/', '(', ')']

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, opts = {}, &blk) ⇒ UrlMount

Returns a new instance of UrlMount.



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# File 'lib/url_mount.rb', line 10

def initialize(path, opts = {}, &blk)
  @raw_path, @options = path, opts
  @url_split_regex = Regexp.new("[^#{DELIMETERS.collect{|d| Regexp.quote(d)}.join}]+|[#{DELIMETERS.collect{|d| Regexp.quote(d)}.join}]")
  @host, @scheme = opts[:host], opts[:scheme]
  @callbacks = []
  @callbacks << blk if blk
end

Instance Attribute Details

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/url_mount.rb', line 6

def host
  @host
end

#options ⇒ Object Also known as: defaults

Returns the value of attribute options.



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# File 'lib/url_mount.rb', line 6

def options
  @options
end

#raw_path ⇒ Object

Returns the value of attribute raw_path.



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# File 'lib/url_mount.rb', line 6

def raw_path
  @raw_path
end

#scheme ⇒ Object

Returns the value of attribute scheme.



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# File 'lib/url_mount.rb', line 6

def scheme
  @scheme
end

#url_mount ⇒ Object

Returns the value of attribute url_mount.



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# File 'lib/url_mount.rb', line 6

def url_mount
  @url_mount
end

Instance Method Details

#callback(&blk) ⇒ Object 



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# File 'lib/url_mount.rb', line 18

def callback(&blk)
  @callbacks << blk if blk
  @callbacks
end

#local_segments ⇒ Object 



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# File 'lib/url_mount.rb', line 23

def local_segments
  @local_segments || parse_local_segments
end

#optional_variable_segments ⇒ Object 



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# File 'lib/url_mount.rb', line 49

def optional_variable_segments
  @optional_variable_segments ||= begin
    local_segments.map{|s| s.optional_variable_segments}.flatten.compact
  end
end

#optional_variables ⇒ Object 



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# File 'lib/url_mount.rb', line 37

def optional_variables
  @optional_variables ||= begin
    optional_variable_segments.map{|s| s.name}
  end
end

#required_variable_segments ⇒ Object 



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# File 'lib/url_mount.rb', line 43

def required_variable_segments
  @required_variable_segments ||= begin
    local_segments.map{|s| s.required_variable_segments}.flatten.compact
  end
end

#required_variables ⇒ Object 



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# File 'lib/url_mount.rb', line 31

def required_variables
  @required_variables ||= begin
    required_variable_segments.map{|s| s.name}
  end
end

#url(env = {}, opts = {}) ⇒ Object Also known as: to_s 



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# File 'lib/url_mount.rb', line 64

def url(env = {}, opts = {})
  unless env.key?('rack.version')
    opts = env
    env  = nil
  end

  @callbacks.each{|blk| blk.call(env,opts)} if env

  requirements_met =  (local_required_variables - (opts.keys + options.keys)).empty?

  if !required_to_generate? && !requirements_met
    nil
  else
    raise Ungeneratable, "Missing required variables" if !requirements_met
    path = local_segments.inject([]){|url, segment| str = segment.to_s(opts); url << str if str; url}.join
    match = /(.*?)\/?$/.match(path)
    result = match[1]
    path = url_mount.nil? ? result : File.join(url_mount.to_s(opts), result)
    _host   = opts.delete(:host)    || host
    _scheme = opts.delete(:scheme)  || scheme
    if _host || _scheme
      _scheme ||= "http"
      raise Ungeneratable, "Missing host when generating absolute url" if _scheme && !_host
      uri = URI.parse(path)
      uri.host    = _host
      uri.scheme  = _scheme || "http"
      uri.to_s
    else
      path
    end
  end
end

#variables ⇒ Object 



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# File 'lib/url_mount.rb', line 27

def variables
  required_variables + local_variables
end