Class: Ath::Command

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

Constant Summary collapse

MAX_LIST_QUERY = 
20

Instance Method Summary collapse

Constructor Details

#initialize(shell:, command:, arg: nil) ⇒ Command

Returns a new instance of Command.



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# File 'lib/ath/command.rb', line 4

def initialize(shell:, command:, arg: nil)
  @shell = shell
  @command = command
  @arg = arg
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/ath/command.rb', line 10

def run
  out = nil

  case @command
  when 'debug'
    if @arg == 'true' or @arg == 'false'
      @shell.options[:debug] = (@arg =~ /true/)
    else
      out = !!@shell.options.fetch(:debug)
    end
  when 'desc'
    if @arg
      query_execution = @shell.driver.get_query_execution(query_execution_id: @arg)
      out = JSON.pretty_generate(query_execution.to_h)
    else
      out = "Usage: /desc QUERY_EXECUTION_ID"
    end
  when 'help'
    out = usage
  when 'list'
    query_executions = @shell.driver.list_query_executions
    query_executions.sort_by! {|qe| qe.status.submission_date_time }.reverse!

    lines = query_executions.map do |qe|
      line = [
        qe.status.submission_date_time,
        qe.query_execution_id,
        qe.status.state,
      ]

      if qe.query.length > MAX_LIST_QUERY
        line << qe.query.slice(0, MAX_LIST_QUERY) + '..'
      else
        line << qe.query
      end

      line.join("\s")
    end

    if @arg
      lines = lines.slice(0, @arg.to_i)
    end

    out = lines.join("\n")
  when 'output_location'
    if @arg
      @shell.driver.output_location = @arg
    else
      out = @shell.driver.output_location
    end
  when 'pager'
    if @arg
      @shell.pager = @arg
    else
      @shell.pager = nil
      out = "Using stdout"
    end
  when 'region'
    if @arg
      @shell.driver.region = @arg
    else
      out = @shell.driver.region
    end
  when 'result'
    if @arg
      out = @shell.driver.get_query_execution_result(query_execution_id: @arg)
    else
      out = "Usage: /result QUERY_EXECUTION_ID"
    end
  when 'save'
    if @arg
      query_execution_id, path = @arg.split(/\s+/, 2)
      path ||= Dir.pwd
      path = @shell.driver.save_query_execution_result(query_execution_id: query_execution_id, path: path)
      out = "Save to #{path}"
    else
      out = "Usage: /result QUERY_EXECUTION_ID [PATH]"
    end
  when 'stop'
    if @arg
      @shell.driver.stop_query_execution(query_execution_id: @arg)
    else
      out = "Usage: /stop QUERY_EXECUTION_ID"
    end
  when 'use'
    if @arg
      @shell.driver.database = @arg
    else
      out = "Usage: /use DATABASE"
    end
  else
    raise Ath::Error, "Unknown command: #{@command}"
  end

  out
end