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# frozen_string_literal: true
module DesignManagement
class VersionsFinder
attr_reader :design_or_collection, :current_user, :params
# The `design_or_collection` argument should be either a:
#
# - DesignManagement::Design, or
# - DesignManagement::DesignCollection
#
# The object will have `#versions` called on it to set up the
# initial scope of the versions.
#
# valid params:
# - earlier_or_equal_to: Version
# - sha: String
# - version_id: Integer
#
def initialize(design_or_collection, current_user, params = {})
@design_or_collection = design_or_collection
@current_user = current_user
@params = params
end
def execute
unless Ability.allowed?(current_user, :read_design, design_or_collection)
return ::DesignManagement::Version.none
end
items = design_or_collection.versions
items = by_earlier_or_equal_to(items)
items = by_sha(items)
items = by_version_id(items)
items.ordered
end
private
def by_earlier_or_equal_to(items)
return items unless params[:earlier_or_equal_to]
items.earlier_or_equal_to(params[:earlier_or_equal_to])
end
def by_version_id(items)
return items unless params[:version_id]
items.id_in(params[:version_id])
end
def by_sha(items)
return items unless params[:sha]
items.by_sha(params[:sha])
end
end
end
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