Class: CLI

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CLI

Returns a new instance of CLI.



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 9

def initialize
end

Instance Attribute Details

#current_item ⇒ Object

Returns the value of attribute current_item.



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 7

def current_item
  @current_item
end

#time ⇒ Object (readonly)

Returns the value of attribute time.



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 6

def time
  @time
end

Class Method Details

.display_time ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 207

def self.display_time
  puts Time.new
end

Instance Method Details

#article_options_menu(article) ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 166

def article_options_menu(article)
  #takes article object as an argument
  #automatically displays article headline, network name, and article metadata (i.e. author, date & time posted, number of comments, tags etc.)

  #gives the option for the user to either go to the article in browser or scrape the contents of the article
  self.select_scrape_method(article)

  puts "_____________________________________"
  puts ""
  puts article.network_name
  puts article.headline
  puts article.date
  puts ""
  puts article.summary
  puts ""
  puts "---------------"
  puts ""

  puts "What would you like to do? Enter a number."
  puts "1. View article in browser."
  puts "2. Return to previous menu."
  puts "Or type 'exit'."
  input = gets.strip.upcase
  case input
  when "1"
    Launchy.open(article.url)
  when "2"
    self.display_menu
    self.respond_to_selection(self.select_item)
  when "EXIT"
    self.exit_CLI
  else
    puts "Invalid Selection"
    self.article_options_menu(article)
  end
end

#call ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 12

def call
  puts "Initializing..."
  Scraper.msnbc_homepage
  Scraper.fox_homepage
  Scraper.reuters_homepage
  puts("done")
  puts("")

  self.greet
  self.display_menu #initial menu selection of what you want to see
  self.respond_to_selection(self.select_item)

end

#display_menu ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 34

def display_menu
  self.class.display_time
  puts ""
  self.print_group_headlines
end

#exit_CLI ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 113

def exit_CLI
  puts "Goodbye!"
  exit
end

#greet ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 26

def greet
  puts "Welcome to Headline Scraper"
  sleep(1)
  puts "Please select which of the following articles you would like to view:"
  sleep(1.5)
  puts ""
end

#print_group_headlines ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 41

def print_group_headlines
  Network.all.each do |network|
    puts network.name #prints network name once
    network.print_headlines # prints network headlines in numbered list
    puts "" #for spacing
  end
end

#respond_to_selection(selection) ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 118

def respond_to_selection(selection)
    if selection.length == 1
      the_network = Network.find_by_name(selection[0])
      the_network.go_to_homepage
    elsif selection.length == 2
      the_network = Network.find_by_name(selection[0])
      the_article = the_network.articles[selection[1]-1]
      self.article_options_menu(the_article)
    end
end

#retrieve_article ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 204

def retrieve_article
end

#select_item ⇒ Object

returns an array where arr is the network name and arr is the article number.



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 80

def select_item #returns an array where arr[0] is the network name and arr[1] is the article number.
  #currently accepts all entries that do not contain a colon.  Later make it so it checks whether the network entered exists.
  selection = nil
  until selection_exists?(selection) || selection == 'EXIT'
    puts "To go to a network homepage, just type the name of that network."
    puts "To go to a specific story, type the network name and then the article number, separated by a colon (e.g., BBC : 2)"
    puts "To exit at any time, type 'exit'."

    selection = gets.strip
    selection = selection.split(":") if selection != nil #turns the entered data into an array so ti can be processed
    if valid_selection?(selection)
      selection[0].strip!
      selection[0] = selection[0].upcase
      if selection.length == 1
        if selection[0] == 'EXIT'
          self.exit_CLI
        end
      elsif selection.length == 2
        selection[1].strip!
        selection[1] = selection[1].to_i
      end

      if !selection_exists?(selection)
        puts "Selection not found"
      end
    else
      puts "Invalid Entry"
    end

  end
  selection
end

#select_scrape_method(article) ⇒ Object 



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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 153

def select_scrape_method(article)

  case article.network_name

  when "REUTERS"
    Scraper.reuters_article(article)
  when "FOX NEWS"
    Scraper.fox_article(article)
  when "MSNBC"
    Scraper.msnbc_article(article)
  end
end

#selection_exists?(selection) ⇒ Boolean

post-screens entries to make sure the valid entry actually refers to an existing item

Returns:

  • (Boolean) 


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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 129

def selection_exists?(selection) #post-screens entries to make sure the valid entry actually refers to an existing item
  if self.valid_selection?(selection)
    if selection.length == 1
      if Network.find_by_name(selection[0])
        true
      else
        false
      end
    elsif selection.length == 2
      if Network.find_by_name(selection[0])
        if selection[1] > Network.find_by_name(selection[0]).articles.length || selection[1] <= 0
          false
        else
          true
        end
      else
        false
      end
    end
  else
    false
  end
end

#valid_selection?(selection) ⇒ Boolean

pre-screens nonsensical entries. DOES NOT check whether the item entered exists

Returns:

  • (Boolean) 


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# File 'lib/CLI_Headline_Scraper/CLI.rb', line 49

def valid_selection?(selection) #pre-screens nonsensical entries. DOES NOT check whether the item entered exists
  if selection == nil #
    false
  elsif selection.length == 0
    false
  elsif selection.length == 1
    if selection[0].to_i != 0 #makes furst first item isnt Integer
      false
    else
      true
    end
  elsif selection.length == 2
    if selection[0].to_i != 0 #makes sure first item isnt Integer
      false
    else
      if selection[1].to_i == 0 #makes sure second item IS integer
        false
      elsif selection[1].to_i > 3 #makes sure there are not >3 entries
        false
      else
        true
      end
    end
  elsif selection.length > 2 #makes sure entry isnt longer than 3
    false
  else
    true
  end
end