Added ingredient functionality

app/assets/stylesheets/application.scss

@@ -24,6 +24,28 @@
 @import "typeahead-bootstrap";
 @import "recipes";
 
+// Skin overrides
+.has-error {
+  .help-block,
+  .control-label,
+  .radio,
+  .checkbox,
+  .radio-inline,
+  .checkbox-inline,
+  &.radio label,
+  &.checkbox label,
+  &.radio-inline label,
+  &.checkbox-inline label,
+  .form-control-feedback {
+    color: $state-danger-text;
+  }
+
+  .form-control,
+  .form-control:focus {
+    border-color: $state-danger-border;
+  }
+}
+
 $footer_height: 40px;
 
 html {

app/assets/stylesheets/journal_custom_colors.scss

@@ -1,4 +1,5 @@
 
 $brand-primary: darken(#93C54B, 10%);
+$brand-success: $brand-primary;
 $text-color: #3E3F3A;
 

app/controllers/ingredients_controller.rb

@@ -127,7 +127,7 @@ class IngredientsController < ApplicationController
 
     # Never trust parameters from the scary internet, only allow the white list through.
     def ingredient_params
-      params.require(:ingredient).permit(:name, :notes, :ndbn, :density, :water, :protein, :lipids, :carbohydrates, :kcal, :fiber, :sugar)
+      params.require(:ingredient).permit(:name, :notes, :ndbn, :density, :water, :protein, :lipids, :carbohydrates, :kcal, :fiber, :sugar, :calcium, :sodium, :vit_k, :ingredient_units_attributes => [:name, :gram_weight, :id, :_destroy])
     end
 
     def conversion_params

app/models/ingredient.rb

@@ -2,6 +2,9 @@ class Ingredient < ActiveRecord::Base
   include TokenizedLike
 
   belongs_to :user
+  has_many :ingredient_units, inverse_of: :ingredient, dependent: :destroy
+
+  accepts_nested_attributes_for :ingredient_units, allow_destroy: true
 
   validates :name, presence: true
   validates :density, density: true, allow_blank: true
@@ -18,6 +21,16 @@ class Ingredient < ActiveRecord::Base
     end
   end
 
+  def custom_unit_weight(unit)
+    ingredient_units.each do |iu|
+      if iu.matches?(unit)
+        return UnitConversion::parse(iu.gram_weight, 'grams')
+      end
+    end
+
+    nil
+  end
+
   def ndbn=(value)
     @usda_food = nil
     super

app/models/ingredient_unit.rb

@@ -0,0 +1,17 @@
+class IngredientUnit < ActiveRecord::Base
+  belongs_to :ingredient, inverse_of: :ingredient_units
+
+  validates :name, presence: true
+  validates :gram_weight, presence: true
+
+  def matches?(unit)
+    case
+      when unit.empty? && ['each', 'ech', 'item', 'per'].include?(self.name.downcase)
+        true
+      when unit.downcase.singularize == self.name.downcase
+        true
+      else
+        false
+    end
+  end
+end

app/models/recipe_ingredient.rb

@@ -67,32 +67,47 @@ class RecipeIngredient < ActiveRecord::Base
   end
 
   def to_mass
-    return unless self.quantity.present?
-    if ingredient && ingredient.density
-      density = UnitConversion.parse(ingredient.density)
-      if density.density?
-        value_unit = UnitConversion.parse(self.quantity, self.units)
-        value_unit = value_unit.to_mass(density)
+    value_unit = as_value_unit
+    density = self.ingredient.density? ? UnitConversion.parse(ingredient.density) : nil
 
+    case
+      when value_unit.nil?
+      when value_unit.mass?
+        self.quantity = value_unit.pretty_value
+        self.units = value_unit.unit.to_s
+      when value_unit.volume? && density && density.density?
+        value_unit = value_unit.to_mass(density)
         self.quantity = value_unit.pretty_value
         self.units = value_unit.unit.to_s
-      end
     end
   end
 
+  def custom_unit?
+    self.ingredient && self.ingredient.custom_unit_weight(self.units).present?
+  end
+
   def can_convert_to_grams?
-    if self.quantity.present? && self.units.present?
-      value_unit = UnitConversion.parse(self.quantity, self.units)
-      value_unit.mass? || (value_unit.volume? && self.ingredient && self.ingredient.density.present?)
-    else
-      false
-    end
+    vu = as_value_unit
+    vu.present? && (vu.mass? || (vu.volume? && self.ingredient && self.ingredient.density.present?))
   end
 
   def to_grams
-    value_unit = UnitConversion.parse(self.quantity, self.units)
+    value_unit = as_value_unit
     gram_unit = value_unit.convert('g', self.ingredient ? self.ingredient.density : nil)
     gram_unit.raw_value
   end
 
+  def as_value_unit
+    case
+      when self.quantity.blank?
+        nil
+      when self.custom_unit?
+        self.ingredient.custom_unit_weight(self.units).scale(self.quantity)
+      when self.units.present?
+        UnitConversion.parse(self.quantity, self.units)
+      else
+        nil
+    end
+  end
+
 end

app/views/ingredients/_form.html.erb

@@ -33,6 +33,47 @@
     <%= f.text_field :density, class: 'form-control', disabled: has_ndbn %>
   </div>
 
+  <div class="panel panel-default">
+    <div class="panel-heading">
+      <h3 class="panel-title">Ingredient Units</h3>
+    </div>
+    <div class="panel-body">
+      <div class="ingredient-unit-list">
+        <%= f.fields_for :ingredient_units do |iu_form| %>
+          <%= render partial: 'ingredients/ingredient_unit_fields', locals: {f: iu_form } %>
+        <% end %>
+
+        <%= link_to_add_association 'add unit', f, :ingredient_units, class: 'btn btn-primary' %>
+      </div>
+    </div>
+  </div>
+
+  <% if has_ndbn %>
+
+    <div class="panel panel-default">
+      <div class="panel-heading">
+        <h3 class="panel-title">NDBN Unit Weights</h3>
+      </div>
+      <div class="panel-body">
+        <table class="table table-condensed">
+          <thead>
+          <tr>
+            <th>Name</th>
+            <th>Grams</th>
+          </tr>
+          </thead>
+          <% @ingredient.usda_food.usda_food_weights.each do |w| %>
+            <tr>
+              <td><%= "#{w.amount} #{w.description}" %></td>
+              <td><%= w.gram_weight %></td>
+            </tr>
+          <% end %>
+        </table>
+      </div>
+    </div>
+
+  <% end %>
+
   <div class="form-group">
     <%= f.label :notes, class: 'control-label' %>
     <%= f.text_area :notes, class: 'form-control' %>

app/views/ingredients/_ingredient_unit_fields.html.erb

@@ -0,0 +1,22 @@
+<div class="nested-fields row">
+
+  <div class="form-group col-xs-5 col-sm-6">
+    <%= f.label :name, class: 'control-label' %>
+    <%= f.text_field :name, class: 'form-control' %>
+  </div>
+
+  <div class="form-group col-xs-4 col-sm-5">
+    <%= f.label :gram_weight, 'Grams', class: 'control-label' %>
+    <%= f.text_field :gram_weight, class: 'form-control' %>
+  </div>
+
+  <div class="form-group col-xs-3 col-sm-1">
+    <label class="control-label"></label>
+    <p class="form-control-static">
+      <%= link_to_remove_association f, class: 'btn btn-danger btn-sm' do %>
+        <span class="glyphicon glyphicon-remove"></span>
+      <% end %>
+    </p>
+  </div>
+
+</div>

config/initializers/inflections.rb

@@ -14,3 +14,7 @@
 # ActiveSupport::Inflector.inflections(:en) do |inflect|
 #   inflect.acronym 'RESTful'
 # end
+
+ActiveSupport::Inflector.inflections(:en) do |inflect|
+  inflect.irregular 'clove', 'cloves'
+end

db/migrate/20160705181132_add_ingredient_units.rb

@@ -0,0 +1,9 @@
+class AddIngredientUnits < ActiveRecord::Migration
+  def change
+    create_table :ingredient_units do |t|
+      t.integer :ingredient_id, null: false, index: true
+      t.string :name, null: false
+      t.decimal :gram_weight, precision: 10, scale: 2, null: false
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,15 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160622180838) do
+ActiveRecord::Schema.define(version: 20160705181132) do
+
+  create_table "ingredient_units", force: :cascade do |t|
+    t.integer "ingredient_id",                          null: false
+    t.string  "name",                                   null: false
+    t.decimal "gram_weight",   precision: 10, scale: 2, null: false
+  end
+
+  add_index "ingredient_units", ["ingredient_id"], name: "index_ingredient_units_on_ingredient_id"
 
   create_table "ingredients", force: :cascade do |t|
     t.string   "name"

spec/factories/ingredient_unit.rb

@@ -0,0 +1,8 @@
+FactoryGirl.define do
+  factory :ingredient_unit do
+    ingredient
+    name 'Each'
+    gram_weight 10.5
+  end
+
+end

spec/models/ingredient_spec.rb

@@ -27,6 +27,7 @@ RSpec.describe Ingredient, type: :model do
     it 'sets the density' do
       i = build(:ingredient)
       f = create(:salted_butter)
+      create(:usda_food_weight, usda_food: f)
 
       i.set_usda_food(f)
 
@@ -34,4 +35,16 @@ RSpec.describe Ingredient, type: :model do
     end
   end
 
+  describe '#custom_unit_weight' do
+    it 'returns a ValueUnit for valid custom weights' do
+      i = build(:ingredient)
+      i.ingredient_units << IngredientUnit.new(name: 'clove', gram_weight: 20.0)
+
+      vu = i.custom_unit_weight('clove')
+      expect(vu).not_to be_nil
+      expect(vu.raw_value).to eq 20.0
+      expect(vu.unit.to_s).to eq 'gram'
+    end
+  end
+
 end

spec/models/ingredient_unit_spec.rb

@@ -0,0 +1,31 @@
+require 'rails_helper'
+
+RSpec.describe IngredientUnit, type: :model do
+
+  describe 'matches?' do
+    it 'matches empty units to each-like terms' do
+      each_terms = [
+          'Each',
+          'each',
+          'ech',
+          'item',
+          'per',
+          'PER',
+          'Per'
+      ]
+
+      each_terms.each do |t|
+        expect(create(:ingredient_unit, name: t).matches?('')).to eq(true), "expected #{t} to match"
+      end
+    end
+
+    it 'matches unit names' do
+      expect(create(:ingredient_unit, name: 'Clove').matches?('clove')).to eq true
+    end
+
+    it 'matches pluralized unit names' do
+      expect(create(:ingredient_unit, name: 'Clove').matches?('cloves')).to eq true
+    end
+  end
+
+end

spec/models/recipe_ingredient_spec.rb

@@ -2,6 +2,27 @@ require 'rails_helper'
 
 RSpec.describe RecipeIngredient, type: :model do
 
+  describe 'to_mass' do
+
+    it 'converts volume ingredients with density' do
+      ri = RecipeIngredient.new(quantity: 2, units: 'tbsp', ingredient: create(:ingredient_with_density))
+      expect(ri.as_value_unit.mass?).to be_falsey
+      ri.to_mass
+      expect(ri.as_value_unit.mass?).to be_truthy
+    end
+
+    it 'converts ingredients with custom units' do
+      i = create(:ingredient_with_density)
+      i.ingredient_units << IngredientUnit.new(name: 'pat', gram_weight: 25)
+      ri = RecipeIngredient.new(quantity: 2, units: 'pat', ingredient: i)
+      ri.to_mass
+      vu = ri.as_value_unit
+      expect(vu.raw_value).to eq 50
+      expect(vu.unit.to_s).to eq 'gram'
+    end
+
+  end
+
   describe '#can_convert_to_grams' do
     it 'returns false if no quantity or unit' do
       ri = RecipeIngredient.new