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bot.rb
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bot.rb
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require 'facebook/messenger'
require 'httparty'
require 'json'
include Facebook::Messenger
# NOTE: ENV variables should be set directly in terminal for localhost
# IMPORTANT! Subcribe your bot to your page
Facebook::Messenger::Subscriptions.subscribe(access_token: ENV['ACCESS_TOKEN'])
API_URL = 'https://maps.googleapis.com/maps/api/geocode/json?address='.freeze
def wait_for_user_input
Bot.on :message do |message|
case message.text
when /coord/i, /gps/i # we use regexp to match parts of strings
message.reply(text: 'Enter destination')
process_coordinates
when /full ad/i # we got the user even if he misspells address
message.reply(text: 'Enter destination')
show_full_address
end
end
end
def process_coordinates
Bot.on :message do |message|
parsed_response = get_parsed_response(API_URL, message.text)
if !parsed_response
message.reply(text: 'There were no resutls. Ask me again, please')
wait_for_user_input
return
end
message.type # let user know we're doing something
coord = extract_coordinates(parsed_response)
message.reply(text: "Latitude: #{coord['lat']} / Longitude: #{coord['lng']}")
wait_for_user_input
end
end
def show_full_address
Bot.on :message do |message|
parsed_response = get_parsed_response(API_URL, message.text)
if !parsed_response
message.reply(text: 'There were no resutls. Ask me again, please')
wait_for_user_input
return
end
message.type # let user know we're doing something
full_address = extract_full_address(parsed_response)
message.reply(text: full_address)
wait_for_user_input
end
end
# Talk to API
def get_parsed_response(url, query)
response = HTTParty.get(url + query)
parsed = JSON.parse(response.body)
parsed['status'] != 'ZERO_RESULTS' ? parsed : nil
end
def extract_coordinates(parsed)
parsed['results'].first['geometry']['location']
end
def extract_full_address(parsed)
parsed['results'].first['formatted_address']
end
# launch the loop
wait_for_user_input