Class: Picky::Cursed

Inherits:
Object show all
Includes:
Curses
Defined in:
lib/picky-client/tools/cursed.rb

Overview

A simple terminal based search.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(given_uri, id_amount = nil) ⇒ Cursed

Returns a new instance of Cursed.



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# File 'lib/picky-client/tools/cursed.rb', line 12

def initialize given_uri, id_amount = nil
  check_picky_client_gem

  init_screen
  curs_set 1
  stdscr.keypad(true)

  require 'uri'
  uri = URI.parse given_uri

  # If the user gave a whole url without http, add that and reparse.
  #
  unless uri.path
    uri = URI.parse "http://#{given_uri}"
  end

  # If the user gave a path without / in front, add one.
  #
  unless uri.path =~ /^\//
    uri.path = "/#{uri.path}"
  end

  @searches  = 0
  @durations = 0

  @current_text  = ''
  @id_amount     = id_amount && Integer(id_amount) || 20
  @client        = Picky::Client.new uri

  install_trap
end

Instance Attribute Details

#client ⇒ Object (readonly)

Returns the value of attribute client.



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# File 'lib/picky-client/tools/cursed.rb', line 10

def client
  @client
end

Instance Method Details

#add_text(text) ⇒ Object

Add the given text to the current text.



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# File 'lib/picky-client/tools/cursed.rb', line 91

def add_text text
  @current_text << text
end

#backspace ⇒ Object

Delete one character.



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# File 'lib/picky-client/tools/cursed.rb', line 78

def backspace
  chop_text
  move_to_input
  clrtoeol
end

#check_picky_client_gem ⇒ Object

:nodoc:



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# File 'lib/picky-client/tools/cursed.rb', line 43

def check_picky_client_gem # :nodoc:
  require 'picky-client'
rescue LoadError
  warn_gem_missing 'picky-client', 'the terminal interface'
  exit 1
end

#chop_text ⇒ Object

Chop off one character.



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# File 'lib/picky-client/tools/cursed.rb', line 85

def chop_text
  @current_text.chop!
end

#clear_error ⇒ Object 



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# File 'lib/picky-client/tools/cursed.rb', line 169

def clear_error
  move_to_error
  addstr @error_clear_string ||= " "*80
  move_to_input
end

#clear_results ⇒ Object

Clear the result ids.



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# File 'lib/picky-client/tools/cursed.rb', line 113

def clear_results
  move_to_results
  clrtoeol
  move_to_input
end

#error(text) ⇒ Object

Display an error text.



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# File 'lib/picky-client/tools/cursed.rb', line 163

def error text
  move_to_error
  flash
  addstr text
  move_to_input
end

#install_trap ⇒ Object

Install the Ctrl-C handler.



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# File 'lib/picky-client/tools/cursed.rb', line 52

def install_trap
  Signal.trap('INT') do
    move_to_error
    puts "Performed #{@searches} searches (#{"%.3f" % @durations} seconds)."
    sleep 1
    exit
  end
end

#intro ⇒ Object

Display an intro text.



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# File 'lib/picky-client/tools/cursed.rb', line 177

def intro
  addstr "Type and see the result count update. Press enter for the first #{@id_amount} result ids."
  setpos 1, 0
  addstr "Break with Ctrl-C."
  setpos 2, 0
end

#log(results) ⇒ Object

Log a search.



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# File 'lib/picky-client/tools/cursed.rb', line 129

def log results
  @searches += 1
  @durations += (results[:duration] || 0)
end

#move_to_counts ⇒ Object

Positioning.



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# File 'lib/picky-client/tools/cursed.rb', line 63

def move_to_counts
  setpos 3, 0
end

#move_to_error ⇒ Object 



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# File 'lib/picky-client/tools/cursed.rb', line 72

def move_to_error
  setpos 5, 0
end

#move_to_input ⇒ Object 



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# File 'lib/picky-client/tools/cursed.rb', line 66

def move_to_input
  setpos 3, (12 + @current_text.size)
end

#move_to_results ⇒ Object 



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# File 'lib/picky-client/tools/cursed.rb', line 69

def move_to_results
  setpos 4, 12
end

#run ⇒ Object

Run the terminal.

Note: Uses a simple loop to handle input.



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# File 'lib/picky-client/tools/cursed.rb', line 188

def run
  intro

  move_to_input
  search_and_write

  loop do
    input = getch

    case input
    when 10 # Curses::Key::ENTER
      search_and_write true
    when 127 # Curses::Key::BACKSPACE
      delch
      backspace
      search_and_write
    when (256..1000000)

    else
      type_search input.chr
      search_and_write
    end
  end
end

#search(full = false) ⇒ Object

Perform a search.



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# File 'lib/picky-client/tools/cursed.rb', line 136

def search full = false
  client.search @current_text, :ids => (full ? @id_amount : 0)
end

#search_and_write(full = false) ⇒ Object

Perform a search and write the results.

Handles 404s and connection problems.



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# File 'lib/picky-client/tools/cursed.rb', line 144

def search_and_write full = false
  results = search full
  results.extend Picky::Convenience

  clear_error
  log results

  full ? write_results(results) : clear_results

  write_counts results
  move_to_input
rescue Errno::ECONNREFUSED => e
  error "Please start a Picky server listening to #{@client.path}."
rescue Yajl::ParseError => e
  error "Got a 404. Maybe the path #{@client.path} isn't a correct one?"
end

#type_search(character) ⇒ Object

Type the given text into the input area.



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# File 'lib/picky-client/tools/cursed.rb', line 97

def type_search character
  add_text character
end

#write_counts(results) ⇒ Object

Write the amount of result ids.



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# File 'lib/picky-client/tools/cursed.rb', line 121

def write_counts results
  move_to_counts
  addstr "%11d" % (results && results.total || 0)
  move_to_input
end

#write_results(results) ⇒ Object

Write the result ids.



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# File 'lib/picky-client/tools/cursed.rb', line 103

def write_results results
  move_to_results
  addstr "#{results.total ? results.ids(@id_amount) : []}"
  move_to_input
rescue StandardError => e
  p e.message
  p e.backtrace
end