Module: ExportHelper

Defined in:
frontend/app/helpers/export_helper.rb

Defined Under Namespace

Classes: CSVMappingConverter

Instance Method Summary collapse

Instance Method Details

#csv_export_with_mappings(request_uri, params = {}) ⇒ Object

Enhanced CSV export that handles header mapping and field transformations



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# File 'frontend/app/helpers/export_helper.rb', line 43

def csv_export_with_mappings(request_uri, params = {})
  # Extract requested fields from params
  requested_fields = params['fields[]'] || []

  # Map user-requested field names to backend field names for the request
  backend_fields = map_fields_for_backend(requested_fields)

  # Update params to request the correct backend field names
  params = params.dup
  params['fields[]'] = backend_fields if requested_fields.any?
  params["dt"] = "csv"

  result = nil
  JSONModel::HTTP::stream(request_uri, params) do |response|
    old_csv = CSV.parse(response.body)
    new_csv = CSVMappingConverter.new(requested_fields).build_csv_with_mappings old_csv

    # convert arrays back CSV string
    result = new_csv.map { |row| CSV.generate_line(row) }.join
  end
  result
end

#csv_response(request_uri, params = {}, filename_prefix = '') ⇒ Object 



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# File 'frontend/app/helpers/export_helper.rb', line 5

def csv_response(request_uri, params = {}, filename_prefix = '')
  self.response.headers["Content-Type"] = "text/csv"
  self.response.headers["Content-Disposition"] = "attachment; filename=#{filename_prefix}#{Time.now.to_i}.csv"
  self.response.headers['Last-Modified'] = Time.now.ctime.to_s
  params["dt"] = "csv"
  self.response_body = Enumerator.new do |y|
    xml_response(request_uri, params) do |chunk, percent|
      y << chunk if !chunk.blank?
    end
  end
end

#map_fields_for_backend(requested_fields) ⇒ Object 



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# File 'frontend/app/helpers/export_helper.rb', line 28

def map_fields_for_backend(requested_fields)
  backend_fields = []
  requested_fields.each do |field|
    if field == 'context'
      # Context is special - it needs ancestor fields in the backend request
      backend_fields.concat(CSVMappingConverter.ancestor_fields)
    else
      # Map regular fields using shared method
      backend_fields << CSVMappingConverter.map_field_name(field)
    end
  end
  backend_fields
end

#xml_response(request_uri, params = {}) ⇒ Object 



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# File 'frontend/app/helpers/export_helper.rb', line 17

def xml_response(request_uri, params = {})
  JSONModel::HTTP::stream(request_uri, params) do |res|
    size, total = 0, res.header['Content-Length'].to_i
    res.read_body do |chunk|
      size += chunk.size
      percent = total > 0 ? ((size * 100) / total) : 0
      yield chunk, percent
    end
  end
end