Class: Rack::Stereoscope

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

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Stereoscope

Returns a new instance of Stereoscope.



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# File 'lib/rack/stereoscope.rb', line 41

def initialize(app)
  @app = app
end

Instance Method Details

#build_page(content, request, response) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 74

def build_page(content, request, response)
  this = self
  mab = Markaby::Builder.new
  mab.html do 
    head do 
      title request.path
    end
    body do
      
      h1 "#{response.status} #{request.url}"
      if !content.to_s.empty?
        h2 "Response:"
        case response.content_type
        when 'application/json' then
          div do
            this.data_to_html(JSON.parse(content.join), mab)
          end
        when 'text/plain' then
          p content.join
        else
          text Nokogiri::HTML(content.join).css('body').inner_html
        end
      else
        p "(No content)"
      end
      h2 "Raw:"
      tt do
        raw_content = case response.content_type
                      when 'application/json'
                        JSON.pretty_generate(JSON.parse(content.join))
                      else
                        content.join
                      end
        pre raw_content
      end
    end
  end
  mab.to_s
end

#call(env) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 45

def call(env)
  request = Rack::Request.new(env)
  if Rack::AcceptMediaTypes.new(env['HTTP_ACCEPT']).include?('text/html')
    status, headers, body = @app.call(env)
    if request.path == '/__stereoscope_expand_template__'
      expand_template(request)
    else
      present_data(request, status, headers, body)
    end
  else
    @app.call(env)
  end
end

#data_to_html(data, builder) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 114

def data_to_html(data, builder)
  this = self
  case data
  when Hash
    builder.dl do
      data.each_pair do |key, value|
        dt do 
          this.data_to_html(key, builder)
        end
        dd do
          this.data_to_html(value, builder)
        end
      end
    end
  when Array
    if tabular?(data)
      table_to_html(data, builder)
    else
      list_to_html(data, builder)
    end
  when String
    if url?(data)
      if url_template?(data)
        template_to_html(data, builder)
      else
        url_to_html(data, builder)
      end
    else
      builder.div do
        data.split("\n").each do |line|
          builder.span line
          builder.br
        end
      end
    end
  else
    builder.span do data end
  end
end

#expand_template(request) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 66

def expand_template(request)
  template = Addressable::Template.new(request['__template__'])
  url      = template.expand(request.params)
  response = Rack::Response.new
  response.redirect(url.to_s)
  response.finish
end

#list_to_html(data, builder) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 191

def list_to_html(data, builder)
  this = self
  builder.ol do
    data.each do |value|
      li do
        this.data_to_html(value, builder)
      end
    end
  end
end

#present_data(request, status, headers, body) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 59

def present_data(request, status, headers, body)
  response = Rack::Response.new("", status, headers)
  response.write(build_page(body, request, response))
  response['Content-Type'] = 'text/html'
  response.finish
end

#table_to_html(data, builder) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 202

def table_to_html(data, builder)
  this = self
  builder.table do
    headers = data.first.keys
    thead do 
      headers.each do |header| 
        th do
          this.data_to_html(header, builder) 
        end
      end
    end
    tbody do
      data.each do |row|
        tr do
          row.each do |key, value|
            td do
              this.data_to_html(value, builder)
            end
          end
        end
      end
    end
  end
end

#tabular?(data) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/stereoscope.rb', line 162

def tabular?(data)
  data.kind_of?(Array) &&
    data.all?{|e| e.kind_of?(Hash)} &&
    data[1..-1].all?{|e| e.keys == data.first.keys}
end

#template_to_html(text, builder) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 172

def template_to_html(text, builder)
  template = Addressable::Template.new(text)
  builder.div(:class => 'url-template-form') do
    p text
    form(:method => 'GET', :action => '/__stereoscope_expand_template__') do
      input(:type => 'hidden', :name => '__template__', :value => text)
      template.variables.each do |variable|
        div(:class => 'url-template-variable') do
          label do
            text "#{variable}: "
            input(:type => 'text', :name => variable)
          end
        end
      end
      input(:type => 'submit')
    end
  end
end

#url?(text) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/stereoscope.rb', line 154

def url?(text)
  Addressable::URI.parse(text.to_s).ip_based?
end

#url_template?(text) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack/stereoscope.rb', line 158

def url_template?(text)
  !Addressable::Template.new(text.to_s).variables.empty?
end

#url_to_html(url, builder) ⇒ Object 



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# File 'lib/rack/stereoscope.rb', line 168

def url_to_html(url, builder)
  builder.a(url.to_s, :href => url.to_s)      
end