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Contents
module Locomotive::Steam
module Models
class Pager
DEFAULT_PER_PAGE = 10.freeze
attr_reader :collection, :current_page, :per_page, :total_pages, :total_entries
def initialize(source, page, per_page)
@current_page, @per_page = page || 1, per_page || DEFAULT_PER_PAGE
@total_entries = source.count
@total_pages = (@total_entries.to_f / @per_page).ceil
index = (@current_page - 1) * @per_page
offset = (index + @per_page - 1) >= @total_entries ? @total_entries : (index + @per_page - 1)
@collection = paginate(source, index, offset)
end
def previous_page
current_page <= 1 ? nil : current_page - 1
end
def next_page
current_page >= total_pages ? nil : current_page + 1
end
def to_liquid
{
collection: collection,
current_page: current_page,
per_page: per_page,
previous_page: previous_page,
next_page: next_page,
total_entries: total_entries,
total_pages: total_pages
}
end
private
def paginate(source, index, offset)
limit = offset - index + 1
limit = 0 if limit < 1
source.send(:slice, index, limit) || []
end
end
end
end
Version data entries
41 entries across 41 versions & 1 rubygems