X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/28b886362755cb6750b62222cecf87bd9b2efbbe..5cbd4038edb32b0304bd766e70fc680ea447b52b:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index 1da048c96..2d427051c 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -1,18 +1,18 @@
 class Way < ActiveRecord::Base
   require 'xml/libxml'
-  
+
   include ConsistencyValidations
   include NotRedactable
   include ObjectMetadata
 
   self.table_name = "current_ways"
-  
+
   belongs_to :changeset
 
   has_many :old_ways, -> { order(:version) }
 
   has_many :way_nodes, -> { order(:sequence_id) }
-  has_many :nodes, -> { order("sequence_id") }, :through => :way_nodes
+  has_many :nodes, :through => :way_nodes
 
   has_many :way_tags
 
@@ -20,9 +20,9 @@ class Way < ActiveRecord::Base
   has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation
 
   validates_presence_of :id, :on => :update
-  validates_presence_of :changeset_id,:version,  :timestamp
+  validates_presence_of :changeset_id, :version,  :timestamp
   validates_uniqueness_of :id
-  validates_inclusion_of :visible, :in => [ true, false ]
+  validates_inclusion_of :visible, :in => [true, false]
   validates_numericality_of :changeset_id, :version, :integer_only => true
   validates_numericality_of :id, :on => :update, :integer_only => true
   validates_associated :changeset
@@ -31,48 +31,46 @@ class Way < ActiveRecord::Base
   scope :invisible, -> { where(:visible => false) }
 
   # Read in xml as text and return it's Way object representation
-  def self.from_xml(xml, create=false)
-    begin
-      p = XML::Parser.string(xml)
-      doc = p.parse
+  def self.from_xml(xml, create = false)
+    p = XML::Parser.string(xml)
+    doc = p.parse
 
-      doc.find('//osm/way').each do |pt|
-        return Way.from_xml_node(pt, create)
-      end
-      raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.")
-    rescue LibXML::XML::Error, ArgumentError => ex
-      raise OSM::APIBadXMLError.new("way", xml, ex.message)
+    doc.find('//osm/way').each do |pt|
+      return Way.from_xml_node(pt, create)
     end
+    fail OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.")
+  rescue LibXML::XML::Error, ArgumentError => ex
+    raise OSM::APIBadXMLError.new("way", xml, ex.message)
   end
 
-  def self.from_xml_node(pt, create=false)
+  def self.from_xml_node(pt, create = false)
     way = Way.new
 
-    raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create or not pt['version'].nil?
+    fail OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create || !pt['version'].nil?
     way.version = pt['version']
-    raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
+    fail OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
     way.changeset_id = pt['changeset']
 
     unless create
-      raise OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt['id'].nil?
+      fail OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt['id'].nil?
       way.id = pt['id'].to_i
-      # .to_i will return 0 if there is no number that can be parsed. 
+      # .to_i will return 0 if there is no number that can be parsed.
       # We want to make sure that there is no id with zero anyway
-      raise OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.id == 0
+      fail OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.id == 0
     end
 
     # We don't care about the timestamp nor the visibility as these are either
-    # set explicitly or implicit in the action. The visibility is set to true, 
+    # set explicitly or implicit in the action. The visibility is set to true,
     # and manually set to false before the actual delete.
     way.visible = true
 
     # Start with no tags
-    way.tags = Hash.new
+    way.tags = {}
 
     # Add in any tags from the XML
     pt.find('tag').each do |tag|
-      raise OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag['k'].nil?
-      raise OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag['v'].nil?
+      fail OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag['k'].nil?
+      fail OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag['v'].nil?
       way.add_tag_keyval(tag['k'], tag['v'])
     end
 
@@ -80,35 +78,35 @@ class Way < ActiveRecord::Base
       way.add_nd_num(nd['ref'])
     end
 
-    return way
+    way
   end
 
   # Find a way given it's ID, and in a single SQL call also grab its nodes
   #
-  
+
   # You can't pull in all the tags too unless we put a sequence_id on the way_tags table and have a multipart key
   def self.find_eager(id)
-    way = Way.find(id, :include => {:way_nodes => :node})
-    #If waytag had a multipart key that was real, you could do this:
-    #way = Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
+    Way.find(id, :include => { :way_nodes => :node })
+    # If waytag had a multipart key that was real, you could do this:
+    # Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
   end
 
   # Find a way given it's ID, and in a single SQL call also grab its nodes and tags
   def to_xml
     doc = OSM::API.new.get_xml_doc
-    doc.root << to_xml_node()
-    return doc
+    doc.root << to_xml_node
+    doc
   end
 
   def to_xml_node(visible_nodes = nil, changeset_cache = {}, user_display_name_cache = {})
     el = XML::Node.new 'way'
-    el['id'] = self.id.to_s
+    el['id'] = id.to_s
 
     add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
 
     # make sure nodes are output in sequence_id order
     ordered_nodes = []
-    self.way_nodes.each do |nd|
+    way_nodes.each do |nd|
       if visible_nodes
         # if there is a list of visible nodes then use that to weed out deleted nodes
         if visible_nodes[nd.node_id]
@@ -116,52 +114,48 @@ class Way < ActiveRecord::Base
         end
       else
         # otherwise, manually go to the db to check things
-        if nd.node and nd.node.visible?
+        if nd.node && nd.node.visible?
           ordered_nodes[nd.sequence_id] = nd.node_id.to_s
         end
       end
     end
 
     ordered_nodes.each do |nd_id|
-      if nd_id and nd_id != '0'
-        node_el = XML::Node.new 'nd'
-        node_el['ref'] = nd_id
-        el << node_el
-      end
+      next unless nd_id && nd_id != '0'
+
+      node_el = XML::Node.new 'nd'
+      node_el['ref'] = nd_id
+      el << node_el
     end
 
-    add_tags_to_xml_node(el, self.way_tags)
+    add_tags_to_xml_node(el, way_tags)
 
-    return el
-  end 
+    el
+  end
 
   def nds
-    @nds ||= self.way_nodes.collect { |n| n.node_id }
+    @nds ||= way_nodes.collect(&:node_id)
   end
 
   def tags
-    @tags ||= Hash[self.way_tags.collect { |t| [t.k, t.v] }]
+    @tags ||= Hash[way_tags.collect { |t| [t.k, t.v] }]
   end
 
-  def nds=(s)
-    @nds = s
-  end
+  attr_writer :nds
 
-  def tags=(t)
-    @tags = t
-  end
+  attr_writer :tags
 
   def add_nd_num(n)
-    @nds = Array.new unless @nds
+    @nds = [] unless @nds
     @nds << n.to_i
   end
 
   def add_tag_keyval(k, v)
-    @tags = Hash.new unless @tags
+    @tags = {} unless @tags
 
     # duplicate tags are now forbidden, so we can't allow values
     # in the hash to be overwritten.
-    raise OSM::APIDuplicateTagsError.new("way", self.id, k) if @tags.include? k
+    fail OSM::APIDuplicateTagsError.new("way", id, k) if @tags.include? k
 
     @tags[k] = v
   end
@@ -170,8 +164,8 @@ class Way < ActiveRecord::Base
   # the integer coords (i.e: unscaled) bounding box of the way, assuming
   # straight line segments.
   def bbox
-    lons = nodes.collect { |n| n.longitude }
-    lats = nodes.collect { |n| n.latitude }
+    lons = nodes.collect(&:longitude)
+    lats = nodes.collect(&:latitude)
     BoundingBox.new(lons.min, lats.min, lons.max, lats.max)
   end
 
@@ -179,10 +173,10 @@ class Way < ActiveRecord::Base
     Way.transaction do
       self.lock!
       check_consistency(self, new_way, user)
-      unless new_way.preconditions_ok?(self.nds)
-        raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")
+      unless new_way.preconditions_ok?(nds)
+        fail OSM::APIPreconditionFailedError.new("Cannot update way #{id}: data is invalid.")
       end
-      
+
       self.changeset_id = new_way.changeset_id
       self.changeset = new_way.changeset
       self.tags = new_way.tags
@@ -195,7 +189,7 @@ class Way < ActiveRecord::Base
   def create_with_history(user)
     check_create_consistency(self, user)
     unless self.preconditions_ok?
-      raise OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
+      fail OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
     end
     self.version = 0
     self.visible = true
@@ -203,40 +197,38 @@ class Way < ActiveRecord::Base
   end
 
   def preconditions_ok?(old_nodes = [])
-    return false if self.nds.empty?
-    if self.nds.length > MAX_NUMBER_OF_WAY_NODES
-      raise OSM::APITooManyWayNodesError.new(self.id, self.nds.length, MAX_NUMBER_OF_WAY_NODES)
+    return false if nds.empty?
+    if nds.length > MAX_NUMBER_OF_WAY_NODES
+      fail OSM::APITooManyWayNodesError.new(id, nds.length, MAX_NUMBER_OF_WAY_NODES)
     end
 
     # check only the new nodes, for efficiency - old nodes having been checked last time and can't
     # be deleted when they're in-use.
-    new_nds = (self.nds - old_nodes).sort.uniq
+    new_nds = (nds - old_nodes).sort.uniq
 
     unless new_nds.empty?
       db_nds = Node.where(:id => new_nds, :visible => true)
 
       if db_nds.length < new_nds.length
-        missing = new_nds - db_nds.collect { |n| n.id }
-        raise OSM::APIPreconditionFailedError.new("Way #{self.id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
+        missing = new_nds - db_nds.collect(&:id)
+        fail OSM::APIPreconditionFailedError.new("Way #{id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
       end
     end
 
-    return true
+    true
   end
 
   def delete_with_history!(new_way, user)
-    unless self.visible
-      raise OSM::APIAlreadyDeletedError.new("way", new_way.id)
-    end
-    
-    # need to start the transaction here, so that the database can 
+    fail OSM::APIAlreadyDeletedError.new("way", new_way.id) unless visible
+
+    # need to start the transaction here, so that the database can
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Way.transaction do
       self.lock!
       check_consistency(self, new_way, user)
       rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Way", :member_id => id }).order(:id)
-      raise OSM::APIPreconditionFailedError.new("Way #{self.id} is still used by relations #{rels.collect { |r| r.id }.join(",")}.") unless rels.empty?
+      fail OSM::APIPreconditionFailedError.new("Way #{id} is still used by relations #{rels.collect(&:id).join(",")}.") unless rels.empty?
 
       self.changeset_id = new_way.changeset_id
       self.changeset = new_way.changeset
@@ -250,18 +242,18 @@ class Way < ActiveRecord::Base
 
   # Temporary method to match interface to nodes
   def tags_as_hash
-    return self.tags
+    tags
   end
 
   ##
   # if any referenced nodes are placeholder IDs (i.e: are negative) then
-  # this calling this method will fix them using the map from placeholders 
-  # to IDs +id_map+. 
+  # this calling this method will fix them using the map from placeholders
+  # to IDs +id_map+.
   def fix_placeholders!(id_map, placeholder_id = nil)
-    self.nds.map! do |node_id|
+    nds.map! do |node_id|
       if node_id < 0
         new_id = id_map[:node][node_id]
-        raise OSM::APIBadUserInput.new("Placeholder node not found for reference #{node_id} in way #{self.id.nil? ? placeholder_id : self.id}") if new_id.nil?
+        fail OSM::APIBadUserInput.new("Placeholder node not found for reference #{node_id} in way #{id.nil? ? placeholder_id : id}") if new_id.nil?
         new_id
       else
         node_id
@@ -270,15 +262,15 @@ class Way < ActiveRecord::Base
   end
 
   private
-  
+
   def save_with_history!
     t = Time.now.getutc
 
-    # update the bounding box, note that this has to be done both before 
-    # and after the save, so that nodes from both versions are included in the 
+    # update the bounding box, note that this has to be done both before
+    # and after the save, so that nodes from both versions are included in the
     # bbox. we use a copy of the changeset so that it isn't reloaded
     # later in the save.
-    cs = self.changeset
+    cs = changeset
     cs.update_bbox!(bbox) unless nodes.empty?
 
     Way.transaction do
@@ -287,21 +279,21 @@ class Way < ActiveRecord::Base
       self.save!
 
       tags = self.tags
-      WayTag.delete_all(:way_id => self.id)
-      tags.each do |k,v|
+      WayTag.delete_all(:way_id => id)
+      tags.each do |k, v|
         tag = WayTag.new
-        tag.way_id = self.id
+        tag.way_id = id
         tag.k = k
         tag.v = v
         tag.save!
       end
 
       nds = self.nds
-      WayNode.delete_all(:way_id => self.id)
+      WayNode.delete_all(:way_id => id)
       sequence = 1
       nds.each do |n|
         nd = WayNode.new
-        nd.id = [self.id, sequence]
+        nd.id = [id, sequence]
         nd.node_id = n
         nd.save!
         sequence += 1
@@ -313,9 +305,9 @@ class Way < ActiveRecord::Base
 
       # reload the way so that the nodes array points to the correct
       # new set of nodes.
-      self.reload
+      reload
 
-      # update and commit the bounding box, now that way nodes 
+      # update and commit the bounding box, now that way nodes
       # have been updated and we're in a transaction.
       cs.update_bbox!(bbox) unless nodes.empty?