Module: AOJ::API

Defined in:
lib/aoj/api.rb

Constant Summary collapse

SUBMISSION_DATE_GAP_SEC =

to identify judge result of a submission

30
RETRY_SEC =

max retry sec fetching result

30
FETCH_STATUS_WAIT_SEC = 
5

Class Method Summary collapse

Class Method Details

.judge_result(solution, submission_date, credential) ⇒ Object 



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# File 'lib/aoj/api.rb', line 119

def judge_result(solution, submission_date, credential)
  start_time = Time.now
  loop do
    if Time.now - start_time > RETRY_SEC
      raise AOJ::Error::FetchResultError, 'Failed to fetch result'
    end

    sleep FETCH_STATUS_WAIT_SEC

    hit = status_log_search(solution.problem, credential)
      .select { |s|
        (s.submission_date - submission_date).abs < SUBMISSION_DATE_GAP_SEC
      }
      .max_by(&:submission_date)

    return hit if hit
  end
end

.loginable?(credential) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/aoj/api.rb', line 138

def loginable?(credential)
  uri = URI.parse("http://judge.u-aizu.ac.jp/onlinejudge/index.jsp")
  params = {
    'loginUserID'   => credential.username,
    'loginPassword' => credential.password
  }
  res = AOJ::HTTP.post_form(uri, params)
  !res.body.include?('Wrong User ID.') and !res.body.include?('Wrong Password.')
end

.problem_list(volume) ⇒ Object 



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# File 'lib/aoj/api.rb', line 89

def problem_list(volume)
  url = "http://judge.u-aizu.ac.jp/onlinejudge/webservice/problem_list"
  params = { "volume" => volume }
  uri = URI.parse("#{url}?#{params.to_query}")
  doc = REXML::Document.new(AOJ::HTTP.get(uri))
  problems = doc.get_elements('problem_list/problem')
  problems.map do |problem|
    {
      id:   problem.get_text('id').value.strip,
      name: problem.get_text('name').value.strip
    }
  end
end

.problem_search(problem_id) ⇒ Object 



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# File 'lib/aoj/api.rb', line 11

def problem_search(problem_id)
  base_url = 'http://judge.u-aizu.ac.jp/onlinejudge/webservice/problem'
  params = { id: problem_id }
  response = AOJ::HTTP.get(
    URI.parse("#{base_url}?#{params.to_query}")
  )
  doc = REXML::Document.new(response)

  if doc.elements['problem/id'].nil?
    raise AOJ::Error::APIError, "Problem id may be invalid (#{problem_id})"
  end

  AOJ::Problem.new.tap do |p|
    v = ->(k) { doc.get_text(k).try(:value).try(:strip) }
    p.id           = v['problem/id']
    p.name         = v['problem/name']
    p.available    = v['problem/available'] == '1'
    p.time_limit   = v['problem/problemtimelimit'].to_i
    p.memory_limit = v['problem/problemmemorylimit'].to_i
  end
end

.status_log_search(problem, credential) ⇒ Object 



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# File 'lib/aoj/api.rb', line 33

def status_log_search(problem, credential)
  base_url = 'http://judge.u-aizu.ac.jp/onlinejudge/webservice/status_log'

  statuses = []
  start = 0, limit = 100
  loop do
    params = {
      'user_id'    => credential.username,
      'problem_id' => problem.id,
      'start'      => start,
      'limit'      => limit
    }
    # TODO: non-blocking
    uri = URI.parse("#{base_url}?#{params.to_query}")
    res =
      REXML::Document.new(AOJ::HTTP.get(uri))
        .get_elements('status_list/status')
    statuses += res

    break if res.size < limit
    start += limit
  end

  statuses.map do |s|
    v = -> (k) { s.get_text(k).try(:value).try(:strip) }
    AOJ::Status.new.tap { |o|
      o.run_id          = v['run_id'].to_i
      o.user_id         = v['user_id']
      o.problem_id      = v['problem_id'].to_i
      o.submission_date = Time.at(v['submission_date'].to_i/1000)
      o.status          = v['status']
      o.language        = v['language']
      o.cputime         = v['cputime']
      o.memory          = v['memory']
      o.code_size       = v['code_size']
    }
  end
end

.submit(solution, credential) ⇒ Object 



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# File 'lib/aoj/api.rb', line 103

def submit(solution, credential)
  uri = URI.parse('http://judge.u-aizu.ac.jp/onlinejudge/servlet/Submit')
  params = {
    'userID'     => credential.username,
    'password'   => credential.password,
    'problemNO'  => solution.problem.id,
    'sourceCode' => solution.source,
    'language'   => solution.language.submit_name
  }

  if AOJ::HTTP.post_form(uri, params).code != '200'
    raise AOJ::Error::APIError, 'Failed to submit'
  end
  solution
end

.user(user_id) ⇒ Object 



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# File 'lib/aoj/api.rb', line 72

def user(user_id)
  url = "http://judge.u-aizu.ac.jp/onlinejudge/webservice/user"
  params = { "id" => user_id }
  uri = URI.parse("#{url}?#{params.to_query}")
  doc = REXML::Document.new(AOJ::HTTP.get(uri))
  solved_problems = doc.get_elements('user/solved_list/problem')
  {
    id:   doc.get_text('user/id').value.strip,
    name: doc.get_text('user/name').value.strip,
    solved_list: solved_problems.map { |item|
      {
        id: item.get_text('id').value.strip
      }
    }
  }
end