spinlister
------
Well, they have toomany thins to handel they are currently working on next level which allow geolocation of bike(current when it is in use)
and i found a letest concept by them to rent in loop with their smart lock protection ....



Let's Talk about Technology stack, i am not sute what they are using but if i have to build i will select something like this....
-----------------------------------------------------------------------------------------------------------------------------

PLSql or MongoDB
JQuery
Nginx 1.7.12
Ruby on Rails
Ruby
react.js or anguler.js
Google Analytics
Handlebars
Moment.js
Underscore.js


Welll, They have server with ip: 104.25.16.12
city: San Francisco
Country: US
Host/Organization/ISP: cloudflare
last update on 30/01/2017 at around 23 o'clock

open ports: 80, 443, 2082, 2083, 2086-87, 8080, 8443, 8880




Let's talk about task(The database)
------------------------------------

For building this application i will use "devise" and "cancancan" for simple user authorization and access
Second, for location "geolocation" is best fit
...............................................

This prototype need some models like USER, RIDE, RESERVATION, PHOTO and COMMENTS...

Lets start with model and their relations.....
(i am going to define their relation as rails style...)
(inn this task, i am trying to write some validation and some function to show you my rails knowledge)

1.User
------
class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :omniauthable #by default function from devise
  validates :fullname, length: {maximum: 50}, presence: true

  has_many :rides
  has_many :reservations
  has_many :comments

   # we can add some omni-auth futures in it like login with facebook and google and funcution will like
  def self.from_omniauth(auth)
      user = User.where(email: auth.info.email).first
      if user
        return user
      else
        where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
          user.fullname = auth.info.name
          user.provider = auth.provider
          user.uid = auth.uid
          user.email = auth.info.email
          user.image = auth.info.image
          user.password = Devise.friendly_token[0, 20]
        end
      end
  end
end

2.ride
------
class Ride < ActiveRecord::Base
  belongs_to :user
  has_many :photos
  has_many :reservations
  has_many :comments
  geocoded_by :address
  # If address is updated, geocode will generate a new set of latitude and longitude
  after_validation :geocode, if: :address_changed?

  validates :home_type, :room_type, :accomodate, :bedroom, :bathroom, :listing_name, :summary, :address, presence: true
  validates :listing_name, length: {maximum: 50}
  validates :summary, length: {maximum: 500}
end

3.Reservation
------------
class Reservation < ActiveRecord::Base
  belongs_to :user
  belongs_to :ride
end

4.Photo
--------
class Photo < ActiveRecord::Base  #here we can use many gem like paperclip or carrerway probebaly mt spelling are worng
  belongs_to :rides

  has_attached_file :image, styles: { medium: "300x300>", thumb: "100x100>" }
  validates_attachment_content_type :image
end

5.comment(Feedback)
---------
class Comment < ActiveRecord::Base
  belongs_to :rides
  belongs_to :users

## now all relationship are shown here


                           Now Some points
                           ---------------
-- using cancanan we add some fields to specify them as HOST, ADMIN and CLIENTS
  and provide them a service like it ...

-- I will use UX as like First page is a searching page to find a room and reserve ir and after it
   they wil pay using paypal, braintree or stripe like service provider ##i didn't made table of it but it will relate to reservation and use   both from many to many associations

-- i didn't introduce delay_job module for confirmation instruction mail from devise..
--- till their is to many tables need for notification, discounts and other functionality,however, their is a table for coupons as well

But most part of this application is searching ...
in ruby many gem we have we can use "ransack", "acts_as_bookable", :elestic search" and many more but i recommend to make it by ourself for a better result, because this kind of app are alwase reliable on their search...

--chat for host and clients


-- well according to my search in spinlister they are going to provide their own service of bikes, in which they provide bike with geolocation and a smart lock


Geolocation and smartlock--
-------------------------
if we have to inpliments this kind of things we have to make some api for geolocation tracking and password system for smart lock.
smart lock need a separet api with high data encryption

well we can build a lock bye own and with geolocation it will cost us around 25-35 USD, if all components can essly avilableil

well if you going to china for this think and specific bord for smartlock and geolocation wich will cost you less
basically we need ardino for it simple implimentation and sometimes we need python or embedded C to programme it
basically smartlock is just a IOT module
--- if yu are looking for servse like this you have to wait for a long time because their are many micro services we need to impliments


---- if you are looking for more on smartlocks i can made another document for it (smartlock and bluetooth)


In this Task i didn't specifed field of data base because they are almost same as airbnb