156 lines
4.1 KiB
Ruby
156 lines
4.1 KiB
Ruby
# == Schema Information
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#
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# Table name: ways
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#
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# way_id :integer default(0), not null, primary key
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# changeset_id :integer not null
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# timestamp :datetime not null
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# version :integer not null, primary key
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# visible :boolean default(TRUE), not null
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# redaction_id :integer
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#
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# Indexes
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#
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# ways_changeset_id_idx (changeset_id)
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# ways_timestamp_idx (timestamp)
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#
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# Foreign Keys
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#
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# ways_changeset_id_fkey (changeset_id => changesets.id)
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# ways_redaction_id_fkey (redaction_id => redactions.id)
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#
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class OldWay < ActiveRecord::Base
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include ConsistencyValidations
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include ObjectMetadata
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self.table_name = "ways"
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self.primary_keys = "way_id", "version"
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# note this needs to be included after the table name changes, or
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# the queries generated by Redactable will use the wrong table name.
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include Redactable
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belongs_to :changeset
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belongs_to :redaction
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belongs_to :current_way, :class_name => "Way", :foreign_key => "way_id"
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has_many :old_nodes, :class_name => "OldWayNode", :foreign_key => [:way_id, :version]
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has_many :old_tags, :class_name => "OldWayTag", :foreign_key => [:way_id, :version]
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validates :changeset, :presence => true, :associated => true
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validates :timestamp, :presence => true
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validates :visible, :inclusion => [true, false]
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def self.from_way(way)
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old_way = OldWay.new
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old_way.visible = way.visible
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old_way.changeset_id = way.changeset_id
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old_way.timestamp = way.timestamp
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old_way.way_id = way.id
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old_way.version = way.version
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old_way.nds = way.nds
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old_way.tags = way.tags
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old_way
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end
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def save_with_dependencies!
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save!
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tags.each do |k, v|
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tag = OldWayTag.new
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tag.k = k
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tag.v = v
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tag.way_id = way_id
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tag.version = version
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tag.save!
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end
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sequence = 1
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nds.each do |n|
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nd = OldWayNode.new
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nd.id = [way_id, version, sequence]
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nd.node_id = n
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nd.save!
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sequence += 1
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end
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end
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def nds
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@nds ||= old_nodes.order(:sequence_id).collect(&:node_id)
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end
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def tags
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@tags ||= Hash[old_tags.collect { |t| [t.k, t.v] }]
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end
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attr_writer :nds
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attr_writer :tags
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def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
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el = XML::Node.new "way"
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el["id"] = way_id.to_s
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add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
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old_nodes.each do |nd| # FIXME: need to make sure they come back in the right order
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node_el = XML::Node.new "nd"
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node_el["ref"] = nd.node_id.to_s
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el << node_el
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end
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add_tags_to_xml_node(el, old_tags)
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el
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end
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# Read full version of old way
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# For get_nodes_undelete, uses same nodes, even if they've moved since
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# For get_nodes_revert, allocates new ids
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# Currently returns Potlatch-style array
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# where [5] indicates whether latest version is usable as is (boolean)
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# (i.e. is it visible? are we actually reverting to an earlier version?)
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def get_nodes_undelete
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nds.collect do |n|
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node = Node.find(n)
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[node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible]
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end
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end
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def get_nodes_revert(timestamp)
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points = []
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nds.each do |n|
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oldnode = OldNode.where("node_id = ? AND timestamp <= ?", n, timestamp).unredacted.order("timestamp DESC").first
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curnode = Node.find(n)
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id = n
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reuse = curnode.visible
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if oldnode.lat != curnode.lat || oldnode.lon != curnode.lon || oldnode.tags != curnode.tags
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# node has changed: if it's in other ways, give it a new id
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if curnode.ways - [way_id]
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id = -1
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reuse = false
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end
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end
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points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse]
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end
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points
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end
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# Temporary method to match interface to ways
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def way_nodes
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old_nodes
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end
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# Pretend we're not in any relations
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def containing_relation_members
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[]
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end
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# check whether this element is the latest version - that is,
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# has the same version as its "current" counterpart.
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def is_latest_version?
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current_way.version == version
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end
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end
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