Create Bot ;-).

Gemfile

@@ -1,2 +1,6 @@
+ruby '2.4.4'
+
 source 'https://rubygems.org'
-gem 'sinatra'
+gem 'sinatra', '2.0.2'
+gem 'httparty'
+gem 'google-api-client'

Gemfile.lock

@@ -0,0 +1,76 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    declarative (0.0.10)
+    declarative-option (0.1.0)
+    faraday (0.13.1)
+      multipart-post (>= 1.2, < 3)
+    google-api-client (0.19.6)
+      addressable (~> 2.5, >= 2.5.1)
+      googleauth (>= 0.5, < 0.7.0)
+      httpclient (>= 2.8.1, < 3.0)
+      mime-types (~> 3.0)
+      representable (~> 3.0)
+      retriable (>= 2.0, < 4.0)
+    googleauth (0.6.2)
+      faraday (~> 0.12)
+      jwt (>= 1.4, < 3.0)
+      logging (~> 2.0)
+      memoist (~> 0.12)
+      multi_json (~> 1.11)
+      os (~> 0.9)
+      signet (~> 0.7)
+    httparty (0.15.7)
+      multi_xml (>= 0.5.2)
+    httpclient (2.8.3)
+    jwt (2.1.0)
+    little-plugger (1.1.4)
+    logging (2.2.2)
+      little-plugger (~> 1.1)
+      multi_json (~> 1.10)
+    memoist (0.16.0)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
+    multi_json (1.12.1)
+    multi_xml (0.6.0)
+    multipart-post (2.0.0)
+    mustermann (1.0.3)
+    os (0.9.6)
+    public_suffix (2.0.5)
+    rack (2.0.5)
+    rack-protection (2.0.2)
+      rack
+    representable (3.0.4)
+      declarative (< 0.1.0)
+      declarative-option (< 0.2.0)
+      uber (< 0.2.0)
+    retriable (3.1.1)
+    signet (0.8.1)
+      addressable (~> 2.3)
+      faraday (~> 0.9)
+      jwt (>= 1.5, < 3.0)
+      multi_json (~> 1.10)
+    sinatra (2.0.2)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.2)
+      tilt (~> 2.0)
+    tilt (2.0.8)
+    uber (0.1.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  google-api-client
+  httparty
+  sinatra (= 2.0.2)
+
+RUBY VERSION
+   ruby 2.4.4p296
+
+BUNDLED WITH
+   1.16.5

LICENSE.txt

@@ -0,0 +1,20 @@
+Copyright JS Foundation and other contributors, https://js.foundation/
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -0,0 +1,46 @@
+# Arnaldo Bot
+
+A simple bot for helping you with your financial life, read more [here](http://karreiro.com/2018/09/25/financial-bot.html).
+
+
+## Demo
+[![Demo](http://karreiro.com/assets/demo-bot.gif "Demo")](http://karreiro.com/assets/demo-bot.gif)
+
+
+## Configuring
+
+Configure an instance of the bot by following the next 3 simple steps:
+
+### 1) Telegram environment variables
+
+First of all, configure the **TELEGRAM_TOKEN** and the **TELEGRAM_ID** environment variables.
+
+You'll need to create a bot on Telegram, by adding the *BotFather* and following the instructions there. He will help you with everything and, in the end, you will get the bot token.
+
+Considering that the token is something like `"111111111:AAAAaa11aaaaAA1aAAaAA1AAaAaaaAaaaAA"`, the **TELEGRAM_TOKEN** value must be `"bot111111111:AAAAaa11aaaaAA1aAAaAA1AAaAaaaAaaaAA"` (noticed that it's necessary to add the word _bot_ in the beginning).
+
+For the **TELEGRAM_ID**, variable, which your user id, you can ask for it to the @jsondumpbot ;-)
+
+
+### 2) Google API environment variables
+
+The variables configured in this steps are: **GOOGLE_ACCOUNT_TYPE**, **GOOGLE_CLIENT_EMAIL** and **GOOGLE_PRIVATE_KEY**.
+
+First, go to [Google Developers Console](https://console.developers.google.com/project), click the Library section, enable Google Sheets API, and finally, in the Service account section, create a service account without roles, with the "G Suite Domain-wide Delegation" enabled.
+
+Finally, click on the "Create key" button and Download the JSON file with the three variables that we need.
+
+
+### 3) The spreadsheet
+
+Create a spreadsheet on Google Drive. The URL is something like this `https://docs.google.com/spreadsheets/d/AAAAAA/edit`, and the `AAAAAA` is the **SPREADSHEET_ID** that we're looking for.
+
+Finally, share the spreadsheet with the e-mail from the **GOOGLE_CLIENT_EMAIL** variable, and boom! It's done :-)
+
+
+## Contributing
+  1. Fork it
+  2. Create your feature branch (`git checkout -b my-new-feature`)
+  3. Commit your changes (`git commit -am 'Add some feature'`)
+  4. Push to the branch (`git push origin my-new-feature`)
+  5. Create a new Pull Request

adalberto.rb

@@ -0,0 +1,60 @@
+class Adalberto
+
+  attr_reader :message
+
+  def initialize(message)
+    @message = message
+  end
+
+  def execute!
+    return unless message.valid?
+    return unless message.valid_sender?
+
+    if message.expense?
+      say append_expense(message)
+    else
+      say excuse(message)
+    end
+  end
+
+  private
+
+  def append_expense(message)
+    finance_spreadsheet.append_expense finance_entry(message)
+    success
+  rescue
+    'Oops... Something went wrong! ☹️'
+  end
+
+  def success
+    [
+      'Ok... done! 😉',
+      'Done! 😁',
+      'Ok, ok... done 😒',
+    ].sample
+  end
+
+  def finance_entry(message)
+    FinanceEntry.new(message)
+  end
+
+  def excuse(message)
+    [
+      'I\'m not sure if I can help you right now.. 🧐',
+      'IDK.. 🤔',
+      'Hmmmmmmmmmm.. 😶',
+    ].sample
+  end
+
+  def say(message)
+    telegram.send(message)
+  end
+
+  def finance_spreadsheet
+    @finance_spreadsheet ||= FinanceSpreadsheet.new
+  end
+
+  def telegram
+    @telegram = Telegram.new
+  end
+end

app.rb

@@ -1,5 +1,22 @@
 require 'sinatra'
+require 'google/apis/sheets_v4'
+require 'httparty'
+require 'cgi'
+require './adalberto'
+require './category_engine'
+require './finance_entry'
+require './finance_spreadsheet'
+require './google_sheets_api'
+require './message'
+require './telegram'
 
-get '/' do
-  "Hello World!"
+post '/' do
+
+  json = JSON.parse(request.body.read)
+  message = Message.new(json)
+  adalberto = Adalberto.new(message)
+
+  adalberto.execute!
+
+  status 200
 end

category_engine.rb

@@ -0,0 +1,45 @@
+class CategoryEngine
+
+  attr_reader :message
+
+  def initialize(message)
+    @message = message
+  end
+
+  def category
+    return 'entertainment' if entertainment?
+    return 'market' if market?
+    return 'dinner' if dinner?
+    'other'
+  end
+
+  private
+
+  def entertainment?
+    keywords = %w(beer party)
+
+    keywords.any? do |keyword|
+      raw_message.include?(keyword)
+    end
+  end
+
+  def market?
+    keywords = %w(market shopping)
+
+    keywords.any? do |keyword|
+      raw_message.include?(keyword)
+    end
+  end
+
+  def dinner?
+    keywords = %w(food dinner)
+
+    keywords.any? do |keyword|
+      raw_message.include?(keyword)
+    end
+  end
+
+  def raw_message
+    message.text.downcase
+  end
+end

config.ru

@@ -1,2 +1,2 @@
-require './hello'
+require './app'
 run Sinatra::Application

finance_entry.rb

@@ -0,0 +1,38 @@
+class FinanceEntry
+
+  attr_reader :message
+
+  def initialize(message)
+    @message = message
+  end
+
+  def raw
+    [[id, date, value, category, raw_message]]
+  end
+
+  private
+
+  def id
+    message.id
+  end
+
+  def date
+    message.date
+  end
+
+  def value
+    message.expense_value
+  end
+
+  def category
+    category_engine.category
+  end
+
+  def category_engine
+    CategoryEngine.new(message)
+  end
+
+  def raw_message
+    message.text
+  end
+end

finance_spreadsheet.rb

@@ -0,0 +1,25 @@
+class FinanceSpreadsheet
+
+  attr_reader :google_sheets_api
+
+  def initialize
+    @google_sheets_api = GoogleSheetsApi.new(ENV['SPREADSHEET_ID'])
+  end
+
+  def append_expense(finance_entry)
+    append_data(finance_entry)
+  rescue
+    create_sheet(finance_entry)
+  end
+
+  private
+
+  def append_data(finance_entry)
+    google_sheets_api.append_data(finance_entry.raw)
+  end
+
+  def create_sheet(finance_entry)
+    google_sheets_api.create_sheet
+    google_sheets_api.append_data(finance_entry.raw)
+  end
+end