initial commit

Gemfile

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+source 'https://rubygems.org'
+
+gem 'framework', '0.0.7'
+gem 'sqlite3'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    actionpack (3.2.21)
+      activemodel (= 3.2.21)
+      activesupport (= 3.2.21)
+      builder (~> 3.0.0)
+      erubis (~> 2.7.0)
+      journey (~> 1.0.4)
+      rack (~> 1.4.5)
+      rack-cache (~> 1.2)
+      rack-test (~> 0.6.1)
+      sprockets (~> 2.2.1)
+    activemodel (3.2.21)
+      activesupport (= 3.2.21)
+      builder (~> 3.0.0)
+    activerecord (3.2.21)
+      activemodel (= 3.2.21)
+      activesupport (= 3.2.21)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
+    activesupport (3.2.21)
+      i18n (~> 0.6, >= 0.6.4)
+      multi_json (~> 1.0)
+    arel (3.0.3)
+    awesome_print (1.2.0)
+    builder (3.0.4)
+    erubis (2.7.0)
+    framework (0.0.7)
+      actionpack (~> 3.2, >= 3.2.16)
+      activerecord (~> 3.2, >= 3.2.16)
+      activesupport (~> 3.2, >= 3.2.16)
+      awesome_print (~> 1.2, >= 1.2.0)
+      rake (~> 10.3, >= 10.3.2)
+      thor (~> 0.19, >= 0.19.1)
+    hike (1.2.3)
+    i18n (0.6.11)
+    journey (1.0.4)
+    multi_json (1.10.1)
+    rack (1.4.5)
+    rack-cache (1.2)
+      rack (>= 0.4)
+    rack-test (0.6.2)
+      rack (>= 1.0)
+    rake (10.4.2)
+    sprockets (2.2.3)
+      hike (~> 1.2)
+      multi_json (~> 1.0)
+      rack (~> 1.0)
+      tilt (~> 1.1, != 1.3.0)
+    sqlite3 (1.3.10)
+    thor (0.19.1)
+    tilt (1.4.1)
+    tzinfo (0.3.42)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  framework (= 0.0.7)
+  sqlite3

README.md

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+# The Task
+
+This task is to build the fake business model and predict revenue. Find detailed task description at the bottom of this document.
+If something is unclear or incorrect in the description below - change it the way you think it should be.
+If something is taking too much time for you - drop, don't waste your time, work on other tasks.
+
+------------------------------------------------------------------
+
+# Business model description
+
+
+### Basic terms
+
+- Company - we are the company
+- Client (meaning a set of clients) - the one who pay us money
+- Job - Company does some job for a Client using __one__ subcontractor
+- Subcontractor (set of subscontractors) - Guys who actually do all the job behind the scenes. Client does not know anything about contractor. Only Company deals with Subcontractor (always 1 Subcontractor for every single Job)
+
+### Basic flow
+
+- One of our clients requests a job
+- Job can be accepted or rejected by our Company
+
+### Job accepted scenario:
+
+- Company accepted `start_date` of this job set by Client
+- Company starts working on this job starting from requested `start_date`
+- Company estimates and sets `end_date` to this Job
+- Company sends invoice to the Client
+  - Invoice `due_amount` is equal to `rate_set_for_the_client$ * (end_date - start_date).days`
+  - Invoice gets `pending` status
+  - Client has to pay for this invoice on any date __before__ `end_date`
+  - Invoice hasn't been paid in time scenario:
+    - Invoice gets status `overdue`
+    - On each day after `end_date` we add `rate_set_for_the_client$` amount to the invoice
+    - The Client can't request any new job
+  - Invoice has been paid in time scenario:
+    - Invoice gets status `paid`
+    - Client has an ability to add a new job
+- Company finds Subcontractor who is not too busy with other jobs: should have less than 3 jobs assigned
+- The Subcontractor gets paid once the job assigned to him is done
+- The Subcontractor is paid only for number of days he actually worked:
+- Amount paid to subcontractor: `subcontractor.rate * (end_date - start_date).days`
+- Company can change Job's `end_date`:
+  - Invoice `due_amount` should be recalculated accordingly
+  - If Client already paid for the Invoice:
+    - If `paid_amount > due_amount` then send money to virtual Client's "local" account (stored in our db)
+    - If `paid_amount < due_amount` change `invoice_status` back to `pending`
+- Client gets discount once they paid for 3 jobs (as regular customer)
+- Discount percentage is set in application config `config/application.yml`
+- Client may loose discount if one of their invoices is marked as `overdue`
+
+### Job rejected scenario:
+
+- Company rejected Client's request
+- Client has to create new job, the one which is rejected is no longer in use
+
+## Finally your task:
+
+Calculate the following values:
+
+### Revenue
+
+Revenue is calculated as `SUM(invoices.paid_amount) - SUM(subcontractor_payouts.amount)`.
+
+### Gross sales
+
+Gross sales is equal to `SUM(invoices.paid_amount)`
+
+### Rejection rate
+
+Percentage of jobs rejected by the Company
+
+### Predicted revenue
+
+Predict revenue for: next month, next year. Take any valid acceptable algorythm.
+
+Also include in report:
+
+- Standard deviation (if possible)
+- Worst case / best case revenue
+
+### Per user stats
+
+Calculate for any given period (set by user):
+
+- Top 5 best clients (based on total __revenue__ impact)
+- Top 5 worst clients
+- Best subcontractor (based on total __revenue__ impact). Think more about this one.
+- Worst Client by number of overdue days at the current moment
+
+## Required performance
+
+Take 100000 Clients and 50000 working Subcontractors. Performance is acceptable if you feel comfortable with it :)
+
+------------------------------------------------------------------
+
+This app utilizes Framework v0.0.7 and rocks MIT license.
+

Rakefile

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+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require 'framework'
+require 'framework/rake'
+
+Dir["#{Dir.pwd}/app/tasks/**/*.rake"].each(&method(:load))

app/models/client.rb

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+class Client < ActiveRecord::Base
+  has_many :invoices
+end

app/models/invoice.rb

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+class Invoice < ActiveRecord::Base
+  belongs_to :client
+end
+

app/tasks/hello.rake

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+task hello: :environment do
+  Framework::Logger.disappointment("Hello from: Framework v0.0.7")
+end

config/application.yml

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+development: &common
+  enable_logging: yes
+  autoload_paths:
+    - app/models
+  default_timezone: 'Pacific Time (US & Canada)'
+
+test:
+  <<: *common
+  enable_logging: no
+
+staging:
+  <<: *common
+
+production:
+  <<: *common
+  enable_logging: no

config/databases.yml

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+# Defult database is used by default.
+# Any models locating at app/models root directory will point to this database by default.
+default:
+  development: &common
+    adapter: sqlite3
+    database: the_task_development
+    min_messages: WARNING
+    pool: 5
+    encoding: unicode
+
+  test:
+    <<: *common
+    database: the_task_test
+
+statistics:
+  development: &common
+    adapter: sqlite3
+    database: statistics_development
+    min_messages: WARNING
+    pool: 5
+    encoding: unicode
+
+  test:
+    <<: *common
+    database: statistics

config/environment.rb

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+# Set up gems listed in the Gemfile.
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])
+
+require 'framework'
+
+Bundler.require(:default, Framework.env)
+
+Framework::Application.new do |app|
+  app.init!
+end

config/initializers/time_zone.rb

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+# Sample usage of application config
+Time.zone = Framework.app.config['default_timezone']

db/migrate/20141214070910_create_clients.rb

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+class CreateClients < Framework::Migration
+  use_database :default
+
+  def up
+    create_table :clients do |t|
+      t.string :name
+      t.integer :local_account_amount
+      t.timestamps
+    end
+  end
+
+  def down
+    drop_table :clients
+  end
+end

db/migrate/20141214071354_create_invoices.rb

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+class CreateInvoices < Framework::Migration
+  use_database :default
+
+  def up
+    create_table :invoices do |t|
+      t.integer :amount
+      t.references :client
+      t.timestamps
+    end
+  end
+
+  def down
+    drop_table :invoices
+  end
+end