Class: Post

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

Constant Summary collapse

NEW_MARKER = 
"imported_by:gourmand"
Data = 
:url, :dt, :description, :extended, :tags

Instance Method Summary collapse

Constructor Details

#initialize(hash = nil) {|_self| ... } ⇒ Post

Returns a new instance of Post.

Yields:

  • (_self)

Yield Parameters:

  • _self (Post) —

    the object that the method was called on



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# File 'lib/post.rb', line 14

def initialize(hash=nil)    
  yield self if block_given?        
  if hash
    hash.each do |key, value|
      instance_variable_set("@" + key.to_s, value)
    end
  end        
  raise "all posts must have a URL" if !self.url  
end

Instance Method Details

#==(that) ⇒ Object 



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# File 'lib/post.rb', line 49

def ==(that)
  (that.is_a?(Post) && 
  (self.url == that.url) &&
  (self.description == that.description) &&
  (self.extended == that.extended) &&
  (self.dt == that.dt) && 
  (self.tag_set == that.tag_set)) || false
end

#auto_imported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/post.rb', line 30

def auto_imported?
  tag_set.include?(NEW_MARKER)
end

#dup ⇒ Object 



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# File 'lib/post.rb', line 58

def dup
  Post.new(self.to_h)
end

#fetch_metadata! ⇒ Object 



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# File 'lib/post.rb', line 38

def fetch_metadata!()        
  self.description ||= begin      
    Nokogiri::HTML(open(url)).xpath("//title").text.gsub("\n", " ").gsub(/ +/, " ").strip 
  rescue Exception => e
    puts "WARNING: #{e}"
    url
  end
  
  self.description = url if description.empty?
end

#merge(that) ⇒ Object 



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

def merge(that)
  return self if that.nil?
  raise "cannot merge posts with different URLS: #{self.url} != #{that.url}" if self.url != that.url

  result = Post.new{|p| 
    p.url = self.url
    p.description = that.description

    if(self.extended && !that.extended)
      p.extended = self.extended 
    else
      p.extended = that.extended
    end

    old_tags = that.tag_set 
    new_tags = self.tag_set - old_tags
    
    # remove the new marker unless it was already present in old post
    new_tags -= [NEW_MARKER] unless that.auto_imported?
    
    p.tags = if !new_tags.empty? 
      new_tags.to_a.join(" ") + " " + that.tags
    else
      that.tags
    end

    p.dt = [self.dt, that.dt].compact.min  
  }
  
  result = nil if result == that 
  result
end

#tag_set ⇒ Object 



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# File 'lib/post.rb', line 34

def tag_set
  if !self.tags then Set.new else Set[*self.tags.split] end
end

#to_h ⇒ Object 



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

def to_h
  it = {}
  Data.each{|d| it[d] = instance_variable_get("@" + d.to_s)}
  it
end