Feature/creating budgets

.gitignore

@@ -17,6 +17,7 @@
 
 config/database.yml
 config/config.yml
+PocketMoneyDB.sql
 
 
 **/.DS_Store

Gemfile

@@ -28,7 +28,7 @@ gem 'turbolinks'
 
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 1.0.1'
-
+gem 'draper'
 gem 'haml'
 gem 'twitter-bootstrap-rails', :git => 'git://github.com/seyhunak/twitter-bootstrap-rails.git'
 gem 'less-rails'

Gemfile.lock

@@ -47,6 +47,11 @@ GEM
       execjs
     coffee-script-source (1.6.2)
     commonjs (0.2.6)
+    draper (1.3.0)
+      actionpack (>= 3.0)
+      activemodel (>= 3.0)
+      activesupport (>= 3.0)
+      request_store (~> 1.0.3)
     erubis (2.7.0)
     execjs (1.4.0)
       multi_json (~> 1.0)
@@ -104,6 +109,7 @@ GEM
     rdoc (3.12.2)
       json (~> 1.4)
     ref (1.0.5)
+    request_store (1.0.5)
     ruby-progressbar (1.1.1)
     sass (3.2.9)
     sass-rails (4.0.0.rc1)
@@ -148,6 +154,7 @@ PLATFORMS
 
 DEPENDENCIES
   coffee-rails (~> 4.0.0)
+  draper
   haml
   jbuilder (~> 1.0.1)
   jquery-rails

app/assets/stylesheets/categories.sass

@@ -0,0 +1,2 @@
+.budget
+  width: 700px

app/controllers/categories_controller.rb

@@ -0,0 +1,6 @@
+class CategoriesController < ApplicationController
+  def budgets
+    @budgets = BudgetCategoriesDecorator.new(Category::BudgetCategory.all)
+    @filter  = Category.filter(params)
+  end
+end

app/decorators/budget_categories_decorator.rb

@@ -0,0 +1,3 @@
+class BudgetCategoriesDecorator < Draper::Decorator
+  delegate_all
+end

app/decorators/budget_category_decorator.rb

@@ -0,0 +1,40 @@
+class BudgetCategoryDecorator < Draper::Decorator
+  delegate_all
+
+  def dates_intervals(from, to)
+    @@from = from
+    @@to   = to+1
+  end
+
+  def amount
+    amount = Category::BudgetCategory.interval(@@from, @@to)
+    amount = amount.sum_category(model.id) 
+    amount < 0 ? amount*-1 : amount
+  end
+
+  def limit
+    (model.amount_day * ((@@to - @@from).to_i+1)).round(0)
+  end
+
+  def balance
+    (limit - amount).round(0)
+  end
+
+  def available
+    balance < 0 ? 0 : balance
+  end
+
+  def color 
+    balance < 0 ? "danger" : "warning"
+  end
+
+  def spent_percentage
+    percentage = (amount * 100) / limit
+    percentage < 100 ? percentage : 100
+  end
+
+  def available_percentage
+    100 - spent_percentage
+  end
+
+end

app/helpers/application_helper.rb

@@ -27,4 +27,15 @@ def progress_bar(type, percentage, &block)
     content_tag :div, :class=> "bar bar-#{type}", :style=>"width:#{percentage}%;", &block if percentage > 0
   end
 
+  def set_period(filter)
+    case filter.kind
+    when "month"
+      filter.from.strftime("%B %Y")
+    when "week"
+      "#{filter.from.strftime('%d %B %Y')} - #{filter.to.strftime('%d %B %Y')}"
+    when "year"
+      filter.from.year
+    end
+  end
+
 end

app/helpers/categories_helper.rb

@@ -0,0 +1,7 @@
+module CategoriesHelper
+
+  def total_budget
+    Category::BudgetCategory.total_values(@filter.from, @filter.to+1.day)
+  end
+
+end

app/models/category.rb

@@ -1,8 +1,83 @@
 class Category < ActiveRecord::Base
+  include FilterInterval
+  class BudgetCategory < ActiveRecord::Base
+    self.table_name = "budget_categories"
+    self.primary_key = "id"
+    belongs_to :category, foreign_key: "id"
+    scope :incomes, -> { budgets.where(budget_type: 1)}
+    scope :expenses, -> { budgets.where(budget_type: 0)}
+    scope :sum_incomes,  -> { where(budget_type: 1).sum(:amount) }
+    scope :sum_expenses, -> { where(budget_type: 0).sum(:amount) }
+    scope :interval, ->(from, to) { where("budget_categories.date >= ? AND budget_categories.date <= ?", from, to) }
+    scope :budgets,      -> {select("id, amount_day, budget_type, name").order("name").uniq}
+    scope :sum_category, ->(id) { where(id: id).sum(:amount) }
+
+    def self.total_values(from, to)
+      @@days = (to - from).to_i
+      @@interval = interval(from, to)
+      @@spent = total_spent * -1
+      @@entries = total_entries
+      Hash['saved', saved, 'beat', beat_budget, 'missing', missing_budget, 'deficit', deficit ]
+    end
+
+    private
+    def self.total_spent
+      @@interval.sum_expenses
+    end
+
+    def self.total_entries
+      @@interval.sum_incomes
+    end
+
+    def self.saved 
+      @@entries > @@spent ? @@entries - @@spent : 0
+    end
+
+    def self.beat_budget
+      value = income_vs_expense
+      value > 0 ? value : 0
+    end
+
+    def self.missing_budget
+      value = income_vs_expense
+      value < 0 ? value : 0
+    end
+
+    def self.deficit
+      @@entries - @@spent > 0 ? 0 : @@entries - @@spent
+    end
+
+    def self.income_vs_expense
+      incomes = @@entries - budget_entries 
+      expenses = budget_expenses - @@spent
+      incomes + expenses
+    end
+
+    def self.budget_entries
+      ((incomes.map(&:amount_day).sum) * @@days).round(0) 
+    end
+
+    def self.budget_expenses
+      ((expenses.map(&:amount_day).sum) * @@days).round(0) 
+    end
+  end
+
+  ## Budget period
+  # 0 diario
+  # 1 Semanal
+  # 2 Mensual
+  # 3 Cuatrimestral
+  # 4 Anual
   scope :active,             ->       { where(deleted:false) }
   scope :transaction_ids,    ->(ids)  { joins(:splits => :transaction).where(transactions: {id: ids})                        }
   scope :transaction_totals, ->       { joins(:splits => :transaction).merge(Transaction.total_amount)                       }
   scope :group_by_name,      ->       { select('categories.name', 'categories.id').group('categories.name', 'categories.id') }
 
   has_many :splits
+  has_one :budget_category, foreign_key: "id"
+
+  def self.filter(params)
+    Filter.new(params)
+  end
+
 end