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module JsonApiClient
module Paginating
class Paginator
attr_reader :params, :result_set, :links
def initialize(result_set, data)
@params = params_for_uri(result_set.uri)
@result_set = result_set
@links = data['links']
end
def next
result_set.links.fetch_link("next")
end
def prev
result_set.links.fetch_link("next")
end
def first
result_set.links.fetch_link("first")
end
def last
result_set.links.fetch_link("last")
end
def total_pages
if links["last"]
last_params = params_for_uri(links["last"])
last_params.fetch("page") do
current_page
end.to_i
else
current_page
end
end
# this number may be off
def total_entries
per_page * total_pages
end
alias_method :total_count, :total_entries
def offset
per_page * (current_page - 1)
end
def per_page
params.fetch("per_page") do
result_set.length
end.to_i
end
def current_page
params.fetch("page", 1).to_i
end
def out_of_bounds?
current_page > total_pages
end
def previous_page
current_page > 1 ? (current_page - 1) : nil
end
def next_page
current_page < total_pages ? (current_page + 1) : nil
end
alias limit_value per_page
protected
def params_for_uri(uri)
return {} unless uri
uri = Addressable::URI.parse(uri)
uri.query_values || {}
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems