Class: CartoDB::Exporter

Inherits:
Object
  • Object
show all
Defined in:
lib/cartodb-exporter/exporter.rb

Constant Summary collapse

SUPPORTED_FORMATS = 
%W{ .csv .shp .kml }
OUTPUT_FILE_LOCATION = 
"/tmp"
@@debug = 
true

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Exporter

Returns a new instance of Exporter.



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# File 'lib/cartodb-exporter/exporter.rb', line 17

def initialize(options = {})
  log "options: #{options}"
  @@debug = options[:debug] if options[:debug]
  @table_created = nil
  @export_to_file = options[:export_to_file]
  @type = options[:type]
  raise "export_to_file value can't be nil" if @export_to_file.nil?

  @db_configuration = options.slice(:database, :username, :password, :host, :port)
  @db_configuration[:port] ||= 5432
  @db_configuration[:host] ||= '127.0.0.1'
  @db_connection = Sequel.connect("postgres://#{@db_configuration[:username]}:#{@db_configuration[:password]}@#{@db_configuration[:host]}:#{@db_configuration[:port]}/#{@db_configuration[:database]}")

  unless options[:suggested_name].nil? || options[:suggested_name].blank?
    @force_name = true
    @suggested_name = get_valid_name(options[:suggested_name])
  else
    @force_name = false
  end
  
rescue => e
  log $!
  log e.backtrace
  raise e
end

Class Attribute Details

.debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/cartodb-exporter/exporter.rb', line 8

def debug
  @debug
end

Instance Attribute Details

#db_configuration ⇒ Object

Returns the value of attribute db_configuration.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def db_configuration
  @db_configuration
end

#db_connection ⇒ Object

Returns the value of attribute db_connection.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def db_connection
  @db_connection
end

#export_to_file ⇒ Object

Returns the value of attribute export_to_file.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def export_to_file
  @export_to_file
end

#ext ⇒ Object

Returns the value of attribute ext.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def ext
  @ext
end

#force_name ⇒ Object (readonly)

Returns the value of attribute force_name.



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# File 'lib/cartodb-exporter/exporter.rb', line 15

def force_name
  @force_name
end

#suggested_name ⇒ Object

Returns the value of attribute suggested_name.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def suggested_name
  @suggested_name
end

#table_created ⇒ Object (readonly)

Returns the value of attribute table_created.



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# File 'lib/cartodb-exporter/exporter.rb', line 15

def table_created
  @table_created
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/cartodb-exporter/exporter.rb', line 12

def type
  @type
end

Instance Method Details

#export! ⇒ Object 



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# File 'lib/cartodb-exporter/exporter.rb', line 43

def export!
  path = "#{OUTPUT_FILE_LOCATION}/exporting_#{Time.now.to_i}_#{@export_to_file}"
  
  python_bin_path = `which python`.strip
  psql_bin_path = `which psql`.strip
  
  entries = []
  
  export_type = ".#{@type}"

  if @type == 'csv'
    
    ogr2ogr_bin_path = `which ogr2ogr`.strip
    ogr2ogr_command = %Q{#{ogr2ogr_bin_path} -f "CSV" #{path} PG:"host=#{@db_configuration[:host]} port=#{@db_configuration[:port]} user=#{@db_configuration[:username]} dbname=#{@db_configuration[:database]}" #{@export_to_file}}

    output = `#{ogr2ogr_command} &> /dev/null`
    
    Zip::ZipOutputStream.open("#{path}.zip") do |zia|
      zia.put_next_entry("#{@export_to_file}.#{type}")
      zia.print IO.read("#{path}/#{@export_to_file}.#{type}")
    end
    FileUtils.rm_rf(path)
    
    log "path: #{path}"
    return OpenStruct.new({
      :name => @export_to_file, 
      :import_type => export_type,
      :path => "#{path}.#{type}"
      })
    
  end
  if @type == 'kml'

    ogr2ogr_bin_path = `which ogr2ogr`.strip
    ogr2ogr_command = %Q{#{ogr2ogr_bin_path} -f "KML" #{path}.kml PG:"host=#{@db_configuration[:host]} port=#{@db_configuration[:port]} user=#{@db_configuration[:username]} dbname=#{@db_configuration[:database]}" #{@export_to_file}}

    output = `#{ogr2ogr_command} &> /dev/null`

    Zip::ZipOutputStream.open("#{path}.kmz") do |zia|
      zia.put_next_entry("doc.kml")
      zia.print IO.read("#{path}.kml")
    end
    FileUtils.rm_rf("#{path}.kml")

    log "path: #{path}"
    return OpenStruct.new({
      :name => @export_to_file, 
      :import_type => export_type,
      :path => "#{path}.#{type}"
      })

  end
  if @type == 'shp'

    ogr2ogr_bin_path = `which ogr2ogr`.strip
    ogr2ogr_command = %Q{#{ogr2ogr_bin_path} -f "ESRI Shapefile" #{path}.shp PG:"host=#{@db_configuration[:host]} port=#{@db_configuration[:port]} user=#{@db_configuration[:username]} dbname=#{@db_configuration[:database]}" #{@export_to_file}}

    output = `#{ogr2ogr_command} &> /dev/null`
    
    Zip::ZipOutputStream.open("#{path}.zip") do |zia|
      
      begin
        zia.put_next_entry("#{export_to_file}.shp")
        zia.print IO.read("#{path}.shp")
        FileUtils.rm_rf("#{path}.shp")
      rescue Exception=>e
        # handle e
        log "info #{e}"
      end
    

      begin
        zia.put_next_entry("#{export_to_file}.shx")
        zia.print IO.read("#{path}.shx")
        FileUtils.rm_rf("#{path}.shx")
      rescue Exception=>e
        # handle e
        log "info #{e}"
      end


      begin
        zia.put_next_entry("#{export_to_file}.dbf")
        zia.print IO.read("#{path}.dbf")
        FileUtils.rm_rf("#{path}.dbf")
      rescue Exception=>e
        # handle e
        log "info #{e}"
      end


      begin
        zia.put_next_entry("#{export_to_file}.prj")
        zia.print IO.read("#{path}.prj")
        FileUtils.rm_rf("#{path}.prj")
      rescue Exception=>e
        # handle e
        log "info #{e}"
      end


      begin
        zia.put_next_entry("#{export_to_file}.sbn")
        zia.print IO.read("#{path}.sbn")
        FileUtils.rm_rf("#{path}.sbn")
      rescue Exception=>e
        # handle e
        log "info #{e}"
      end

    end
    
    return OpenStruct.new({
      :name => @export_to_file, 
      :import_type => export_type,
      :path => "#{path}.#{type}"
      })

  end
rescue => e
  log "====================="
  log $!
  log e.backtrace
  log "====================="
  if !@table_created.nil?
    @db_connection.drop_table(@suggested_name)
  end
  raise e
ensure
  @db_connection.disconnect
end