135 lines
4.5 KiB
Ruby
135 lines
4.5 KiB
Ruby
class Ingredient < ActiveRecord::Base
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include BodyTracking::Formula
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enum group: {
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other: 0,
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meat: 1
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}
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belongs_to :project, required: true
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belongs_to :ref_unit, class_name: 'Unit', required: true
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belongs_to :source, required: false
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has_many :nutrients, inverse_of: :ingredient, dependent: :destroy, validate: true
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validates :nutrients, presence: true
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accepts_nested_attributes_for :nutrients, allow_destroy: true, reject_if: proc { |attrs|
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attrs['quantity_id'].blank? && attrs['amount'].blank?
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}
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# Nutrient quantity_id uniqueness check for nested attributes
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validate do
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quantities = self.nutrients.map { |n| n.quantity_id }
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if quantities.length != quantities.uniq.length
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errors.add(:nutrients, :duplicated_quantity)
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end
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end
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validates :name, presence: true, uniqueness: {scope: :project_id}
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validates :ref_amount, numericality: {greater_than: 0}
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validates :group, inclusion: {in: groups.keys}
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after_initialize do
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if new_record?
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self.ref_amount ||= 100
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units = self.project.units
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self.ref_unit ||= units.find_by(shortname: 'g') || units.first
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self.group ||= :other
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self.hidden = false if self.hidden.nil?
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end
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end
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def toggle_hidden!
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self.toggle!(:hidden)
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end
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def self.filter(project, filters, requested_q = Quantity.none)
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ingredients = all
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if filters[:name].present?
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ingredients = ingredients.where("name LIKE ?", "%#{filters[:name]}%")
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end
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if filters[:visibility].present?
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ingredients = ingredients.where(hidden: filters[:visibility] == "1" ? false : true)
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end
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formula_q = if filters[:nutrients].present?
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project.quantities.new(name: '__internal_q',
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formula: filters[:nutrients],
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domain: :diet)
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end
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apply_formula = formula_q.present? && formula_q.valid?
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result =
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if !requested_q.empty? || apply_formula
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computed = ingredients.compute_nutrients(requested_q, apply_formula && formula_q)
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requested_q.present? ? computed : [computed[0]]
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else
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[ingredients]
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end
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result.push(formula_q)
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end
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def self.compute_nutrients(requested_q, filter_q = nil)
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ingredients = all
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unchecked_q = requested_q.map { |q| [q, nil] }
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unchecked_q << [filter_q, nil] if filter_q
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nutrients = Hash.new { |h,k| h[k] = {} }
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Nutrient.where(ingredient: ingredients).includes(:quantity, :unit)
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.order('quantities.lft')
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.pluck('quantities.name', :ingredient_id, :amount, 'units.shortname')
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.each { |q_name, i_id, a, u_id| nutrients[q_name][i_id] = [a, u_id] }
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extra_q = nutrients.keys - requested_q.pluck(:name)
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completed_q = {}
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# FIXME: loop should finish unless there is circular dependency in formulas
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# for now we don't guard against that
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while !unchecked_q.empty?
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q, deps = unchecked_q.shift
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# quantity not computable (no formula) or not requiring calculation/computed
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if q.formula.blank? || (nutrients[q.name].length == ingredients.count)
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completed_q[q.name] = nutrients.delete(q.name) { {} }
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next
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end
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# quantity with formula requires refresh of dependencies availability
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if deps.nil? || !deps.empty?
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deps ||= q.formula_quantities
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deps.reject! { |q| completed_q.has_key?(q.name) }
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deps.each { |q| unchecked_q << [q, nil] unless unchecked_q.index { |u| u[0] == q } }
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end
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# quantity with formula has all dependencies satisfied, requires calculation
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if deps.empty?
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input_q = q.formula_quantities
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inputs = ingredients.select { |i| nutrients[q.name][i.id].nil? }.map do |i|
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[
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i,
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input_q.map do |i_q|
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nutrient_data = completed_q[i_q.name][i.id] || [nil, nil]
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[i_q.name, nutrient_data[0]]
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end.to_h
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]
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end
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q.calculate(inputs).each { |i, result| nutrients[q.name][i.id] = result }
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unchecked_q.unshift([q, deps])
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next
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end
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# quantity still has unsatisfied dependencies, move to the end of queue
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unchecked_q << [q, deps]
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end
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all_q = nutrients.merge(completed_q)
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[
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filter_q ? ingredients.to_a.keep_if { |i| all_q[filter_q.name][i.id][0] } : ingredients,
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ingredients.map { |i| requested_q.map { |q| [q.name, all_q[q.name][i.id]] } },
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ingredients.map do |i|
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extra_q.map { |q_name| [q_name, all_q[q_name][i.id]] if all_q[q_name][i.id] }
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end
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]
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end
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end
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