lib/ditty/helpers/component.rb
# frozen_string_literal: true
require 'active_support'
require 'active_support/inflector'
require 'active_support/core_ext/object/blank'
require 'will_paginate/array'
module Ditty
module Helpers
module Component
include ActiveSupport::Inflector
# param :count, Integer, min: 1, default: 10 # Can't do this, since count can be `all`
def check_count
return 10 if params[:count].nil?
count = params[:count].to_i
return count if count >= 1
excp = Sinatra::Param::InvalidParameterError.new 'Parameter cannot be less than 1'
excp.param = :count
raise excp
end
def dataset
ds = policy_scope(settings.model_class)
ds = ds.where Sequel.|(*search_filters) unless search_filters.blank?
ds = ds.order ordering unless ordering.blank?
filtered(ds)
end
def list
param :q, String
param :page, Integer, min: 1, default: 1
param :sort, String
param :order, String, in: %w[asc desc], transform: :downcase
# TODO: Can we dynamically validate the search / filter fields?
ds = dataset
ds = ds.dataset if ds.respond_to?(:dataset)
params[:order] ||= 'asc' if params[:sort]
return ds if params[:count] == 'all'
params[:count] = check_count
# Account for difference between sequel paginate and will paginate
return ds.paginate(page: params[:page], per_page: params[:count]) if ds.is_a?(Array)
ds.paginate(params[:page], params[:count])
end
def heading(action = nil)
@headings ||= begin
heading = settings.heading || settings.model_class.to_s.demodulize.singularize.titleize
h = Hash.new(heading)
h[:new] = "New #{heading}"
h[:list] = pluralize heading
h[:edit] = "Edit #{heading}"
h
end
@headings[action]
end
def dehumanized
settings.dehumanized || underscore(heading)
end
def check_parameters(action)
permitted_parameters(settings.model_class, action)
end
def filter_fields
self.class.const_defined?('FILTERS') ? self.class::FILTERS : []
end
def searchable_fields
self.class.const_defined?('SEARCHABLE') ? self.class::SEARCHABLE : []
end
def filtered(ds)
filters.each do |filter|
ds = apply_filter(ds, filter)
end
ds
end
def filters
filter_fields.map do |filter|
next if params[filter[:name]].blank?
filter[:field] ||= filter[:name]
filter[:modifier] ||= :to_s # TODO: Do this with Sinatra Param?
filter
end.compact
end
def ordering
return if params[:sort].blank?
Sequel.send(params[:order].to_sym, params[:sort].to_sym)
end
def apply_filter(ds, filter)
value = params[filter[:name]].send(filter[:modifier])
return ds.where(filter[:field] => value) unless filter[:field].to_s.include? '.'
ds.where(filter_field(filter) => filter_value(filter))
end
def filter_field(filter)
filter[:field].to_s.split('.').first.to_sym
end
def filter_value(filter)
field = filter[:field].to_s.split('.').last.to_sym
assoc = filter_association(filter)
value = params[filter[:name].to_s].send(filter[:modifier])
value = assoc.associated_dataset.first(field => value)
value.nil? ? assoc.associated_class.new : value
end
def filter_association(filter)
assoc = filter[:field].to_s.split('.').first.to_sym
assoc = settings.model_class.association_reflection(assoc)
raise "Unknown association #{assoc}" if assoc.nil?
assoc
end
def search_filters
return [] if params[:q].blank?
searchable_fields.map { |f| Sequel.ilike(f.to_sym, "%#{params[:q]}%") }
end
end
end
end