growstuff/app/controllers/crops_controller.rb

require 'will_paginate/array'

class CropsController < ApplicationController
  before_action :authenticate_member!, except: [:index, :hierarchy, :search, :show]
  load_and_authorize_resource
  skip_authorize_resource only: [:hierarchy, :search]
  respond_to :html, :json, :rss, :csv
  responders :flash

  # GET /crops
  # GET /crops.json
  def index
    @sort = params[:sort]
    @crops = crops
    @has_requested_pending = current_member.requested_crops.pending_approval.size if current_member
    @filename = filename
    respond_with(@crops)
  end

  def requested
    @requested = Crop.pending_approval
      .where(requester: current_member)
      .paginate(page: params[:page])
  end

  # GET /crops/wrangle
  def wrangle
    @approval_status = params[:approval_status]
    @crops = case @approval_status
             when "pending"
               Crop.pending_approval
             when "rejected"
               Crop.rejected
             else
               Crop.recent
             end

    @crops = @crops.paginate(page: params[:page])

    @crop_wranglers = Role.crop_wranglers
  end

  # GET /crops/hierarchy
  def hierarchy
    @crops = Crop.toplevel
  end

  # GET /crops/search
  def search
    @term = params[:term]
    @matches = Crop.approved.search(@term)
    @paginated_matches = @matches.paginate(page: params[:page])

    respond_with(@matches)
  end

  # GET /crops/1
  # GET /crops/1.json
  def show
    @crop = Crop.includes(:scientific_names, plantings: :photos).find(params[:id])
    @posts = @crop.posts.paginate(page: params[:page])

    respond_to do |format|
      format.html # show.html.haml
      format.json { render json: @crop.to_json(crop_json_fields) }
    end
  end

  # GET /crops/new
  # GET /crops/new.json
  def new
    @crop = Crop.new
    @crop.alternate_names.build
    @crop.scientific_names.build

    respond_with @crop
  end

  # GET /crops/1/edit
  def edit
    @crop.alternate_names.build if @crop.alternate_names.blank?
    @crop.scientific_names.build if @crop.scientific_names.blank?
  end

  # POST /crops
  # POST /crops.json
  def create
    @crop = Crop.new(crop_params)

    if current_member.role? :crop_wrangler
      @crop.creator = current_member
    else
      @crop.requester = current_member
      @crop.approval_status = "pending"
    end

    if @crop.save
      params[:alt_name].each do |_i, value|
        create_name('alternate', value)
      end
      params[:sci_name].each do |_i, value|
        create_name('scientific', value)
      end
      unless current_member.role? :crop_wrangler
        Role.crop_wranglers.each do |w|
          Notifier.new_crop_request(w, @crop).deliver_now!
        end
      end
    end
    respond_with @crop
  end

  # PUT /crops/1
  # PUT /crops/1.json
  def update
    previous_status = @crop.approval_status

    @crop.creator = current_member if previous_status == "pending"

    if @crop.update(crop_params)
      recreate_names('alt_name', 'alternate')
      recreate_names('sci_name', 'scientific')

      if previous_status == "pending"
        requester = @crop.requester
        new_status = @crop.approval_status
        Notifier.crop_request_approved(requester, @crop).deliver_now! if new_status == "approved"
        Notifier.crop_request_rejected(requester, @crop).deliver_now! if new_status == "rejected"
      end
    end
    respond_with @crop
  end

  # DELETE /crops/1
  # DELETE /crops/1.json
  def destroy
    @crop.destroy
    respond_with @crop
  end

  private

  def recreate_names(param_name, name_type)
    return unless params[param_name].present?
    destroy_names(name_type)
    params[param_name].each do |_i, value|
      create_name(name_type, value)
    end
  end

  def destroy_names(name_type)
    @crop.send("#{name_type}_names").each(&:destroy)
  end

  def create_name(name_type, value)
    @crop.send("#{name_type}_names").create(name: value, creator_id: current_member.id)
  end

  def crop_params
    params.require(:crop).permit(:en_wikipedia_url,
      :name,
      :parent_id,
      :creator_id,
      :approval_status,
      :request_notes,
      :reason_for_rejection,
      :rejection_notes, scientific_names_attributes: [:scientific_name,
                                                      :_destroy,
                                                      :id])
  end

  def filename
    "Growstuff-Crops-#{Time.zone.now.to_s(:number)}.csv"
  end

  def crop_json_fields
    {
      include: {
        plantings: {
          include: {
            owner: { only: [:id, :login_name, :location, :latitude, :longitude] }
          }
        },
        scientific_names: { only: [:name] },
        alternate_names: { only: [:name] }
      }
    }
  end

  def crops
    q = Crop.approved.includes(:scientific_names, plantings: :photos)
    q = q.popular unless @sort == 'alpha'
    q.paginate(page: params[:page])
  end
end