Class: Refine

Inherits:
Object
  • Object
show all
Defined in:
lib/refine.rb,
lib/refine/version.rb

Constant Summary collapse

VERSION = 
"0.3.2"

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}, &block) ⇒ Refine

Returns a new instance of Refine.



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# File 'lib/refine.rb', line 16

def initialize(opts = {}, &block)
  @http_client_config = block
  @server = opts["server"] || "http://127.0.0.1:3333"

   @throws_exceptions = opts["throws_exceptions"] === false ? false : true

  if opts["file_name"] && !opts["file_name"].empty? && opts["project_name"] && !opts["project_name"].empty?
    project_name = CGI.escape(opts["project_name"])
    @project_id = create_project(project_name, opts["file_name"])
    @project_name = project_name if @project_id
  else
    @project_id = opts["project_id"]

    metadata = self.get_project_metadata
    @project_name = CGI.escape(metadata["name"])
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object 



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# File 'lib/refine.rb', line 197

def method_missing(method, *args)
  # translate: get_column_info --> get-column-info

  call(method.to_s.gsub('_', '-'), *args)
end

Instance Attribute Details

#project_id ⇒ Object (readonly)

Returns the value of attribute project_id.



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# File 'lib/refine.rb', line 8

def project_id
  @project_id
end

#project_name ⇒ Object (readonly)

Returns the value of attribute project_name.



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# File 'lib/refine.rb', line 7

def project_name
  @project_name
end

Class Method Details

.get_all_project_metadata(server = "http://127.0.0.1:3333") ⇒ Object 



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

def self.get_all_project_metadata(server="http://127.0.0.1:3333")
  uri = "#{server}/command/core/get-all-project-metadata"
  response = HTTPClient.new().get(uri)
  JSON.parse(response.body)
end

Instance Method Details

#apply_operations(file_name_or_string) ⇒ Object 



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# File 'lib/refine.rb', line 52

def apply_operations(file_name_or_string)
  if File.exist?(file_name_or_string)
    operations = File.read(file_name_or_string)
  else
    operations = file_name_or_string
  end

  call('apply-operations', 'operations' => operations)
end

#call(method, params = {}) ⇒ Object

this pattern is pulled from mailchimp/mailchimp-gem



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# File 'lib/refine.rb', line 91

def call(method, params = {})
  uri = "#{@server}/command/core/#{method}"
  params = { "project" => @project_id }.merge(params)

  response = if method.start_with?('get-')
    client.get(uri, params)
  else
    client.post(uri, params)
  end

  begin
    response = JSON.parse(response.body)
  rescue
    response = JSON.parse('[' + response.body + ']').first
  end

  if @throws_exceptions && response.is_a?(Hash) && response["code"] && response["code"] == "error"
    raise "API Error: #{response}"
  end

  response
end

#compute_facet(*column_names) ⇒ Object 



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# File 'lib/refine.rb', line 127

def compute_facet(*column_names)

  formatted = column_names.map do |column|
    expression, sort_by, invert = facet_opts(column.values.first)
    {
      "columnName" => column.keys.first,
      "expression" => expression,
      "name" => column.keys.first,
      "invert" => invert,
      "sort" => sort_by,
      "selection" => []
    }
  end

  json_facet = JSON::dump(facets: formatted)

  openrefine_response = compute_facets("engine" => json_facet)

  openrefine_response.fetch("facets").map do |facet|

    if facet.key?("choices")

      choices_hash = facet.fetch("choices").map do |h|
        Hash[%w(value label count selected).zip([h["v"]["v"], h["v"]["l"], h["c"], h["s"]])]
      end

      Hash[%w(columnName name expression choices).zip([facet.fetch("columnName"), facet.fetch("name"), facet.fetch("expression"), choices_hash])]
    elsif facet.key?("error")

      Hash[%w(columnName name expression error).zip([facet.fetch("columnName"), facet.fetch("name"), facet.fetch("expression"), facet.fetch("error")])]
    end

  end

end

#create_project(project_name, file_name) ⇒ Object 



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# File 'lib/refine.rb', line 34

def create_project(project_name, file_name)
  uri = @server + "/command/core/create-project-from-upload"
  project_id = false
  File.open(file_name) do |file|
    body = {
      'project-file' => file,
      'project-name' => project_name
    }
    response = client.post(uri, body)
    url = response.header['Location']
    unless url == []
      project_id = CGI.parse(url[0].split('?')[1])['project'][0]
    end
  end
  raise "Error creating project: #{response}" unless project_id
  project_id
end

#delete_project ⇒ Object 



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# File 'lib/refine.rb', line 80

def delete_project
  uri = @server + "/command/core/delete-project"
  body = {
    'project' => @project_id
  }
  @response = client.post(uri, body)
  JSON.parse(@response.content)['code'] rescue false
end

#export_rows(opts = {}) ⇒ Object 



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# File 'lib/refine.rb', line 62

def export_rows(opts={})
  format = opts["format"] || 'tsv'
  uri = @server + "/command/core/export-rows/#{@project_name}.#{format}"

  body = {
    'engine' => {
      "facets" => opts["facets"] || [],
      "mode" => "row-based"
    }.to_json,
    'options' => opts["options"] || '',
    'project' => @project_id,
    'format' => format
  }

  @response = client.post(uri, body)
  @response.content
end

#facet_parameters(*column_names) ⇒ Object 



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# File 'lib/refine.rb', line 163

def facet_parameters(*column_names)
  column_names.map do |column|
    case column when String then
    {
      "c" => {
        "columnName" => column,
        "expression"=>"value",
        "name"=> column,
        "invert"=> false
      },
      "o" => {
        "sort" => "name"
      }
    }
    when Hash
      expression, sort_by, invert = facet_opts(column.values.first)

        {
          "c" => {
            "columnName" => column.keys.first,
            "expression"=> expression,
            "name"=> column.keys.first,
            "invert" => invert
          },
          "o" => {
            "sort" => sort_by
          }
        }
    end
  end
end

#link_to_facets(*column_names) ⇒ Object 



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# File 'lib/refine.rb', line 114

def link_to_facets(*column_names)
  uri = Addressable::URI.parse("#{@server}/project")

  facet = facet_parameters(*column_names)

  json_facet=JSON::dump(facets: facet).gsub(' ', "\t")

  uri.query = Addressable::URI::form_encode({project: @project_id, ui: json_facet})

  uri.to_s.gsub("%09", "%20")

end