Created
November 2, 2017 03:59
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Early Watson Idea
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#!/usr/bin/env ruby | |
require 'io/console' | |
require_relative 'ansi' | |
class App | |
attr_accessor :input | |
attr_accessor :selection | |
class << self | |
attr_accessor :queries | |
end | |
self.queries = [] | |
def initialize | |
@input = '' | |
@selection = 0 | |
end | |
def run | |
IO.console.raw do | |
ANSI.clear_screen | |
ANSI.move_cursor(0, 0) | |
loop do | |
render | |
handle_input | |
end | |
end | |
end | |
def render | |
ANSI.clear_screen | |
ANSI.move_cursor(0, 0) | |
puts input_line | |
ANSI.move_cursor(1, 0) | |
results.each do |result| | |
puts result.join(': ') | |
print "\r" | |
end | |
ANSI.move_cursor(0, input_line.length) | |
end | |
def handle_input | |
char = $stdin.getc | |
case char | |
when "\u0003" # ctrl-c | |
ANSI.clear_screen | |
exit 0 | |
when "\u007F" # backspace | |
self.input = input[0..-2] | |
else | |
input << char | |
end | |
end | |
def input_line | |
'------> ' << input | |
end | |
def results | |
return [] if input.empty? | |
App.queries.map do |query| | |
query.new(input).preview_text | |
end.compact | |
end | |
end | |
# This module contains helpers for various ansi-code operations | |
module ANSI | |
# ANSI color escape codes set the foreground and background colors. | |
# Forground color is a number between 30 and 37. | |
# Background color is a number between 40 and 47. | |
# The ones place represents the same color for both. | |
COLORS = [:black, :red, :green, :yellow, :blue, :magenta, :cyan, 'white', nil, :white].freeze | |
def self.clear_screen | |
$stdout.write "\e[2J" | |
end | |
def self.move_cursor(row, col) | |
$stdout.write "\e[#{row + 1};#{col + 1}H" | |
end | |
def self.color(text, fg: :white, bg: :black) | |
fg = COLORS.index(fg) + 30 | |
bg = COLORS.index(bg) + 40 | |
code = "\e[#{[fg, bg].compact.join(';')}m" | |
"#{code}#{text}\e[0m" | |
end | |
def self.reset | |
"\e[0m" | |
end | |
def self.size | |
win = IO.console.winsize | |
{ | |
height: win[0], | |
width: win[1] | |
} | |
end | |
end | |
class Query | |
attr_reader :input | |
def initialize(input) | |
@input = input | |
end | |
def preview_text | |
res = result | |
[self.class.name, res] if res | |
end | |
def result | |
input | |
end | |
end | |
class Calc < Query | |
include Math | |
def result | |
begin | |
[input, eval(input + '.to_f')].join(' = ') | |
rescue Exception => _e | |
end | |
end | |
def pi | |
PI | |
end | |
def e | |
E | |
end | |
end | |
class Google < Query | |
end | |
class DuckDuckGo < Query | |
end | |
App.queries.push(Calc) | |
App.queries.push(Google) | |
App.queries.push(DuckDuckGo) | |
App.new.run |
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