X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/98b15bef455de6fcf83fec1e5fdddc244dc1a914..38b9f8f7927f09b32a94df87d1264f568f620480:/app/models/changeset.rb?ds=inline diff --git a/app/models/changeset.rb b/app/models/changeset.rb index 047569dca..ab6e05ccf 100644 --- a/app/models/changeset.rb +++ b/app/models/changeset.rb @@ -1,10 +1,10 @@ class Changeset < ActiveRecord::Base require 'xml/libxml' - belongs_to :user + belongs_to :user, :counter_cache => true + + has_many :changeset_tags - has_many :changeset_tags, :foreign_key => 'id' - has_many :nodes has_many :ways has_many :relations @@ -12,38 +12,78 @@ class Changeset < ActiveRecord::Base has_many :old_ways has_many :old_relations - validates_presence_of :user_id, :created_at - validates_inclusion_of :open, :in => [ true, false ] - + has_many :comments, -> { where(:visible => true).order(:created_at) }, :class_name => "ChangesetComment" + has_and_belongs_to_many :subscribers, :class_name => 'User', :join_table => 'changesets_subscribers', :association_foreign_key => 'subscriber_id' + + validates_presence_of :id, :on => :update + validates_presence_of :user_id, :created_at, :closed_at, :num_changes + validates_uniqueness_of :id + validates_numericality_of :id, :on => :update, :integer_only => true + validates_numericality_of :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, :integer_only => true + validates_numericality_of :user_id, :integer_only => true + validates_numericality_of :num_changes, :integer_only => true, :greater_than_or_equal_to => 0 + + before_save :update_closed_at + # over-expansion factor to use when updating the bounding box EXPAND = 0.1 + # maximum number of elements allowed in a changeset + MAX_ELEMENTS = 50000 + + # maximum time a changeset is allowed to be open for. + MAX_TIME_OPEN = 1.day + + # idle timeout increment, one hour seems reasonable. + IDLE_TIMEOUT = 1.hour + # Use a method like this, so that we can easily change how we - # determine whether a changeset is open, without breaking code in at + # determine whether a changeset is open, without breaking code in at # least 6 controllers def is_open? - return open + # a changeset is open (that is, it will accept further changes) when + # it has not yet run out of time and its capacity is small enough. + # note that this may not be a hard limit - due to timing changes and + # concurrency it is possible that some changesets may be slightly + # longer than strictly allowed or have slightly more changes in them. + return ((closed_at > Time.now.getutc) and (num_changes <= MAX_ELEMENTS)) + end + + def set_closed_time_now + if is_open? + self.closed_at = Time.now.getutc + end end def self.from_xml(xml, create=false) begin - p = XML::Parser.new - p.string = xml + p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) doc = p.parse - cs = Changeset.new - doc.find('//osm/changeset').each do |pt| - if create - cs.created_at = Time.now - end - - pt.find('tag').each do |tag| - cs.add_tag_keyval(tag['k'], tag['v']) - end + return Changeset.from_xml_node(pt, create) end - rescue Exception => ex - cs = nil + raise OSM::APIBadXMLError.new("changeset", xml, "XML doesn't contain an osm/changeset element.") + rescue LibXML::XML::Error, ArgumentError => ex + raise OSM::APIBadXMLError.new("changeset", xml, ex.message) + end + end + + def self.from_xml_node(pt, create=false) + cs = Changeset.new + if create + cs.created_at = Time.now.getutc + # initial close time is 1h ahead, but will be increased on each + # modification. + cs.closed_at = cs.created_at + IDLE_TIMEOUT + # initially we have no changes in a changeset + cs.num_changes = 0 + end + + pt.find('tag').each do |tag| + raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing key") if tag['k'].nil? + raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing value") if tag['v'].nil? + cs.add_tag_keyval(tag['k'], tag['v']) end return cs @@ -53,29 +93,32 @@ class Changeset < ActiveRecord::Base # returns the bounding box of the changeset. it is possible that some # or all of the values will be nil, indicating that they are undefined. def bbox - @bbox ||= [ min_lon, min_lat, max_lon, max_lat ] + @bbox ||= BoundingBox.new(min_lon, min_lat, max_lon, max_lat) + end + + def has_valid_bbox? + bbox.complete? end ## - # expand the bounding box to include the given bounding box. also, + # expand the bounding box to include the given bounding box. also, # expand a little bit more in the direction of the expansion, so that - # further expansions may be unnecessary. this is an optimisation + # further expansions may be unnecessary. this is an optimisation # suggested on the wiki page by kleptog. - def update_bbox!(array) - # ensure that bbox is cached and has no nils in it. if there are any - # nils, just use the bounding box update to write over them. - @bbox = bbox.zip(array).collect { |a, b| a.nil? ? b : a } - - # FIXME - this looks nasty and violates DRY... is there any prettier - # way to do this? - @bbox[0] = array[0] + EXPAND * (@bbox[0] - @bbox[2]) if array[0] < @bbox[0] - @bbox[1] = array[1] + EXPAND * (@bbox[1] - @bbox[3]) if array[1] < @bbox[1] - @bbox[2] = array[2] + EXPAND * (@bbox[2] - @bbox[0]) if array[2] > @bbox[2] - @bbox[3] = array[3] + EXPAND * (@bbox[3] - @bbox[1]) if array[3] > @bbox[3] - + def update_bbox!(bbox_update) + bbox.expand!(bbox_update, EXPAND) + # update active record. rails 2.1's dirty handling should take care of # whether this object needs saving or not. - self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox + self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox.to_a if bbox.complete? + end + + ## + # the number of elements is also passed in so that we can ensure that + # a single changeset doesn't contain too many elements. this, of course, + # destroys the optimisation described in the bbox method above. + def add_changes!(elements) + self.num_changes += elements end def tags_as_hash @@ -98,39 +141,54 @@ class Changeset < ActiveRecord::Base def add_tag_keyval(k, v) @tags = Hash.new unless @tags + + # duplicate tags are now forbidden, so we can't allow values + # in the hash to be overwritten. + raise OSM::APIDuplicateTagsError.new("changeset", self.id, k) if @tags.include? k + @tags[k] = v end def save_with_tags! - t = Time.now - # do the changeset update and the changeset tags update in the # same transaction to ensure consistency. Changeset.transaction do - # fixme update modified_at time? - # FIXME there is no modified_at time, should it be added self.save! tags = self.tags - ChangesetTag.delete_all(['id = ?', self.id]) + ChangesetTag.delete_all(:changeset_id => self.id) tags.each do |k,v| tag = ChangesetTag.new + tag.changeset_id = self.id tag.k = k tag.v = v - tag.id = self.id tag.save! end end end - - def to_xml + + ## + # set the auto-close time to be one hour in the future unless + # that would make it more than 24h long, in which case clip to + # 24h, as this has been decided is a reasonable time limit. + def update_closed_at + if self.is_open? + if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT) + self.closed_at = created_at + MAX_TIME_OPEN + else + self.closed_at = Time.now.getutc + IDLE_TIMEOUT + end + end + end + + def to_xml(include_discussion = false) doc = OSM::API.new.get_xml_doc - doc.root << to_xml_node() + doc.root << to_xml_node(nil, include_discussion) return doc end - - def to_xml_node(user_display_name_cache = nil) + + def to_xml_node(user_display_name_cache = nil, include_discussion = false) el1 = XML::Node.new 'changeset' el1['id'] = self.id.to_s @@ -153,15 +211,32 @@ class Changeset < ActiveRecord::Base el2['v'] = v.to_s el1 << el2 end - + el1['created_at'] = self.created_at.xmlschema - el1['open'] = self.open.to_s + el1['closed_at'] = self.closed_at.xmlschema unless is_open? + el1['open'] = is_open?.to_s + + if bbox.complete? + bbox.to_unscaled.add_bounds_to(el1, '_') + end + + el1['comments_count'] = self.comments.count.to_s + + if include_discussion + el2 = XML::Node.new('discussion') + self.comments.includes(:author).each do |comment| + el3 = XML::Node.new('comment') + el3['date'] = comment.created_at.xmlschema + el3['uid'] = comment.author.id.to_s if comment.author.data_public? + el3['user'] = comment.author.display_name.to_s if comment.author.data_public? + el4 = XML::Node.new('text') + el4.content = comment.body.to_s + el3 << el4 + el2 << el3 + end + el1 << el2 + end - el1['min_lon'] = (bbox[0].to_f / GeoRecord::SCALE).to_s unless bbox[0].nil? - el1['min_lat'] = (bbox[1].to_f / GeoRecord::SCALE).to_s unless bbox[1].nil? - el1['max_lon'] = (bbox[2].to_f / GeoRecord::SCALE).to_s unless bbox[2].nil? - el1['max_lat'] = (bbox[3].to_f / GeoRecord::SCALE).to_s unless bbox[3].nil? - # NOTE: changesets don't include the XML of the changes within them, # they are just structures for tagging. to get the osmChange of a # changeset, see the download method of the controller. @@ -175,13 +250,13 @@ class Changeset < ActiveRecord::Base # bounding box, only the tags of the changeset. def update_from(other, user) # ensure that only the user who opened the changeset may modify it. - unless user.id == self.user_id - raise OSM::APIUserChangesetMismatchError + unless user.id == self.user_id + raise OSM::APIUserChangesetMismatchError.new end - + # can't change a closed changeset - unless open - raise OSM::APIChangesetAlreadyClosedError + unless is_open? + raise OSM::APIChangesetAlreadyClosedError.new(self) end # copy the other's tags