Sha256: 979cbc6fd51cd4d2a7011167ded34ee4b9037674f5e4ddf011c1318109513af4
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Size: 1.55 KB
Versions: 9
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Stored size: 1.55 KB
Contents
# -*- encoding: utf-8 -*-
require 'webgen/item_tracker'
module Webgen
class ItemTracker
# This class is used to track changes to a node's meta information.
#
# Depending on what should be tracked, one needs to provide the following item:
#
# [node, nil]
# Tracks changes to the whole meta information of the node, i.e. if any meta information value
# changes, a change is detected.
#
# [node, key]
# Tracks changes to a specific meta information key of the node.
#
# Here are some examples:
#
# website.ext.item_tracker.add(some_node, :node_meta_info, my_node) # first case
# website.ext.item_tracker.add(some_node, :node_meta_info, my_node, 'title') # second case
#
class NodeMetaInfo
CONTENT_MODIFICATION_KEY = 'modified_at'
def initialize(website) #:nodoc:
@website = website
end
def item_id(node, key = nil) #:nodoc:
[node.alcn, key]
end
def item_data(alcn, key = nil) #:nodoc:
mi = @website.tree[alcn].meta_info
key.nil? ? (mi = mi.dup; mi.delete(CONTENT_MODIFICATION_KEY); mi) : mi[key].dup
end
def item_changed?(iid, old_data) #:nodoc:
alcn, key = *iid
@website.tree[alcn].nil? || item_data(alcn, key) != old_data
end
def referenced_nodes(iid, mi) #:nodoc:
[iid.first]
end
def item_description(iid, data) #:nodoc:
alcn, key = *iid
(key.nil? ? "Any meta info from <#{alcn}>" : "Meta info key '#{key}' from <#{alcn}>")
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems