Class: HackerNews

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

Defined Under Namespace

Classes: LoginError

Constant Summary collapse

VERSION = 
'0.2.1'
BASE_URL = 
"http://news.ycombinator.com"
ITEM_URL = 
"#{BASE_URL}/item?id=%s"
USER_URL = 
"#{BASE_URL}/user?id=%s"
LOGIN_SUBMIT_URL = 
"#{BASE_URL}/y"
COMMENT_SUBMIT_URL = 
"#{BASE_URL}/r"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(username = nil, password = nil) ⇒ HackerNews

Creates a new HackerNews object. If username and password are provided, login is called.



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# File 'lib/hackernews.rb', line 24

def initialize(username=nil, password=nil)
  (username, password) if username and password
end

Class Method Details

.version ⇒ Object

Returns the version string for the library.



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# File 'lib/hackernews.rb', line 10

def self.version
  VERSION
end

Instance Method Details

#average_karma ⇒ Object

Retrieves the average karma per post for the logged in user (must be logged in).



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# File 'lib/hackernews.rb', line 47

def average_karma
  require_login!
  user_page.match(/<td valign=top>avg:<\/td><td>([\d\.]+)<\/td>/)[1]
end

#comment(id, text) ⇒ Object

Post a comment on a posted item or on another comment.



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# File 'lib/hackernews.rb', line 69

def comment(id, text)
  require_login!
  fnid = get(ITEM_URL % id).match(/<input type=hidden name="fnid" value="([^"]+)"/)[1]
  post(COMMENT_SUBMIT_URL, 'fnid' => fnid, 'text' => text)
end

#karma(username = nil) ⇒ Object

Retrieves the karma for the logged in user, or for the specified username (if given).



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# File 'lib/hackernews.rb', line 42

def karma(username=nil)
  user_page(username).match(/<td valign=top>karma\:<\/td><td>(\d+)<\/td>/)[1]
end

#login(username, password) ⇒ Object

Log into Hacker News with the specified username and password.



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# File 'lib/hackernews.rb', line 29

def (username, password)
   = get(BASE_URL).match(/href="([^"]+)">login<\/a>/)[1]
  form_html = get(BASE_URL + )
  fnid = form_html.match(/<input type=hidden name="fnid" value="([^"]+)"/)[1]
  response = post(LOGIN_SUBMIT_URL, 'fnid' => fnid, 'u' => username, 'p' => password)
  @username = username
  @password = password
  unless @cookie = response.header['set-cookie']
    raise LoginError, "Login credentials did not work."
  end
end

#user_page(username = nil) ⇒ Object

Retrieves the user page html for the specified username (or the current logged in user if none is specified).



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# File 'lib/hackernews.rb', line 53

def user_page(username=nil)
  username ||= @username
  @user_pages ||= {}
  @user_pages[username] ||= begin
    get(USER_URL % username)
  end
end

#vote(id) ⇒ Object

Up-vote a post or a comment by passing in the id number.



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# File 'lib/hackernews.rb', line 62

def vote(id)
  require_login!
  url = get(ITEM_URL % id).match(/<a id=up_\d+ onclick="return vote\(this\)" href="(vote\?[^"]+)">/)[1]
  get(BASE_URL + '/' + url)
end