Class: Stellar::Homework::Submission

Inherits:
Object
  • Object
show all
Defined in:
lib/stellar/homework.rb

Overview

A student's submission for an assignment.

Defined Under Namespace

Classes: Comment

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tr, homework) ⇒ Submission

Creates a submission from a element in the Stellar homework page.

Parameters:

  • a element in the Stellar homework page describing this submission

  • Stellar client scoped to the assignment that this submission is for

Raises:



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# File 'lib/stellar/homework.rb', line 110

def initialize(tr, homework)
  link = tr.css('a').find do |link|
    (/^\s*\d+\s*$/ =~ link.inner_text) && !(/grade/ =~ link['href'])
  end
  raise ArgumentError, 'Invalid submission-listing <tr>' unless link

  @url = URI.join tr.document.url, link['href']
  @homework = homework
  @client = homework.client
  
  page = @client.get_nokogiri @url

  unless author_link = page.css('#content h4 a[href^="mailto:"]').first
    raise ArgumentError, 'Invalid submission-listing <tr>'
  end
  @name = author_link.inner_text
  @email = author_link['href'].sub /^mailto:/, ''
  @file_url = page.css('#rosterBox a[href*="studentWork"]').map { |link|
    next nil unless link.inner_text == homework.name
    URI.join @url.to_s, link['href']
  }.reject(&:nil?).first
  @time = page.css('#rosterBox .instruction').map { |span|
    unless span.css('strong').any? { |strong| /date/i =~ strong.inner_text }
      next nil
    end
    time_string = span.inner_text.split(':', 2).last.strip
    time = DateTime.parse(time_string + ' GMT-4').to_time
  }.reject(&:nil?).first
  
  @add_comment_url = URI.join @url.to_s,
      page.css('#comments a[href*="add"]').first['href']
  reload_comments! page
end

Instance Attribute Details

#client ⇒ Object (readonly)

Generic Stellar client used to make requests.



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# File 'lib/stellar/homework.rb', line 102

def client
  @client
end

#comments ⇒ Object (readonly)

Comments posted on this submission.



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# File 'lib/stellar/homework.rb', line 96

def comments
  @comments
end

#email ⇒ Object (readonly)

Email of the student who authored this submission.



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# File 'lib/stellar/homework.rb', line 93

def email
  @email
end

#file_url ⇒ Object (readonly)

URL to the last file that the student submitted.



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# File 'lib/stellar/homework.rb', line 84

def file_url
  @file_url
end

#homework ⇒ Object (readonly)

Homework that the submission belongs to.



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# File 'lib/stellar/homework.rb', line 99

def homework
  @homework
end

#name ⇒ Object (readonly)

Name of the student who authored this submission.



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# File 'lib/stellar/homework.rb', line 90

def name
  @name
end

#time ⇒ Object (readonly)

Submission time.



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# File 'lib/stellar/homework.rb', line 87

def time
  @time
end

Instance Method Details

#add_comment(text, file_data = nil, file_mime_type = 'text/plain', file_name = 'attachment.txt') ⇒ Stellar::Homework::Submission

Adds a comment to the student's submission.

Parameters:

  • the comment text

  • (defaults to: nil)

    the content of the file attached to the comment; by default, no file is attached

  • (defaults to: 'text/plain')

    if a file is attached, indicates its type; examples: 'text/plain', 'application/pdf'

  • (defaults to: 'attachment.txt')

    name of the file attached to the comment; by default, 'attachment.txt'

Returns:

  • self



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# File 'lib/stellar/homework.rb', line 161

def add_comment(text, file_data = nil, file_mime_type = 'text/plain',
                file_name = 'attachment.txt')
  add_page = @client.get @add_comment_url
  add_form = add_page.form_with :action => /addcomment/i
  
  add_form.field_with(:name => /newCommentRaw/i).value = text
  add_form.field_with(:name => /newComment/i).value = text
  add_form.checkbox_with(:name => /privateComment/i).checked = :checked
  if file_data
    upload = add_form.file_uploads.first
    upload.file_name = file_name
    upload.mime_type = file_mime_type
    upload.file_data = file_data
  end
  add_form.submit add_form.button_with(:name => /submit/i)
  self
end

#file_data ⇒ String

The contents of the file attached to this Stellar submission.

Returns:

  • raw file data



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# File 'lib/stellar/homework.rb', line 147

def file_data
  @client.get_file @file_url
end

#reload_comments!(page = nil) ⇒ Object

Reloads the problem set's comments page.



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# File 'lib/stellar/homework.rb', line 180

def reload_comments!(page = nil)
  page ||= @client.get_nokogiri @url
  @comments = page.css('#comments ~ table.dataTable').map { |table|
    Comment.new table, self
  }.reject(&:nil?)
end