75 lines
2.2 KiB
Ruby
75 lines
2.2 KiB
Ruby
module Spree
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class StockMailer < ActionMailer::Base
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helper 'spree/base'
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def find_empty_products()
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Spree::Product.where(:count_on_hand => 0).order("name").select {|prod|
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prod.deleted_at.nil? }
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end
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def find_empty_variants()
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Spree::Variant.where(:count_on_hand => 0).order("sku").select {|var|
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var.deleted_at.nil? and not var.is_master?
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}
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end
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def generate_estimate(var)
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shipped_week = Spree::InventoryUnit.find(:all, :conditions => {
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:state => 'shipped',
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:variant_id => var.id,
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:updated_at => @last_week.midnight..@today.end_of_day,
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}).size()
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shipped_month = Spree::InventoryUnit.find(:all, :conditions => {
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:state => 'shipped',
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:variant_id => var.id,
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:updated_at => @last_month.midnight..@today.end_of_day,
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}).size()
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shipped_year = Spree::InventoryUnit.find(:all, :conditions => {
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:state => 'shipped',
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:variant_id => var.id,
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:updated_at => @last_year.midnight..@today.end_of_day,
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}).size()
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# Normalize to units per day... with a shared secret about the range
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norm_week = shipped_week / 7.0
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norm_month = shipped_month / 30.0
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norm_year = shipped_year / 365.0
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# A weighted mean with magic numbers pulled out of thing air.
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mean = ((0.6 * norm_week) + (0.25 * norm_month) + (0.15 * norm_year)) / 1.0
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if var.sku.empty?
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name = "Prd " + var.product.sku
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else
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name = "Sku " + var.sku
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end
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{'weighted_mean' => mean, 'variant' => var, 'product' => var.product, 'name' => name}
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end
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def generate_forecast()
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@today = Date.today
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@last_week = @today - 7
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@last_month = @today - 30
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@last_year = @today - 365
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forecast = []
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vars = Spree::Variant.where("deleted_at IS NULL").order("sku").select {|var|
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var.product.deleted_at.nil? and var.count_on_hand > 0 }
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vars.each {|var|
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forecast.push(generate_estimate(var))
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}
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forecast
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end
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def stock_report_email()
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@empty_products = find_empty_products()
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@empty_variants = find_empty_variants()
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@forecast = generate_forecast()
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mail(:to => 'webshop@sysmocom.de',
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:subject => 'Stock report of the week')
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end
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end
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end
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