metamaps--metamaps/app/services/map_export_service.rb
Devin Howard a8b698b11c Merge pull request #677 from metamaps/feature/node1-topic1-migration
node{1,2}_id => topic{1,2}_id migration and code changes
2016-09-28 22:26:50 +08:00

90 lines
2.3 KiB
Ruby

# frozen_string_literal: true
class MapExportService
attr_reader :user, :map
def initialize(user, map)
@user = user
@map = map
end
def json
# marshal_dump turns OpenStruct into a Hash
{
topics: exportable_topics.map(&:marshal_dump),
synapses: exportable_synapses.map(&:marshal_dump)
}
end
def csv(options = {})
CSV.generate(options) do |csv|
to_spreadsheet.each do |line|
csv << line
end
end
end
private
def topic_headings
[:id, :name, :metacode, :x, :y, :description, :link, :user, :permission]
end
def synapse_headings
[:topic1, :topic2, :category, :description, :user, :permission]
end
def exportable_topics
visible_topics ||= Pundit.policy_scope!(user, map.topics)
topic_mappings = Mapping.includes(mappable: [:metacode, :user])
.where(mappable: visible_topics, map: map)
topic_mappings.map do |mapping|
topic = mapping.mappable
next nil if topic.nil?
OpenStruct.new(
id: topic.id,
name: topic.name,
metacode: topic.metacode.name,
x: mapping.xloc,
y: mapping.yloc,
description: topic.desc,
link: topic.link,
user: topic.user.name,
permission: topic.permission
)
end.compact
end
def exportable_synapses
visible_synapses = Pundit.policy_scope!(user, map.synapses)
visible_synapses.map do |synapse|
next nil if synapse.nil?
OpenStruct.new(
topic1: synapse.topic1_id,
topic2: synapse.topic2_id,
category: synapse.category,
description: synapse.desc,
user: synapse.user.name,
permission: synapse.permission
)
end.compact
end
def to_spreadsheet
spreadsheet = []
spreadsheet << ['Topics']
spreadsheet << topic_headings.map(&:capitalize)
exportable_topics.each do |topics|
# convert exportable_topics into an array of arrays
spreadsheet << topic_headings.map { |h| topics.send(h) }
end
spreadsheet << []
spreadsheet << ['Synapses']
spreadsheet << synapse_headings.map(&:capitalize)
exportable_synapses.each do |synapse|
# convert exportable_synapses into an array of arrays
spreadsheet << synapse_headings.map { |h| synapse.send(h) }
end
spreadsheet
end
end