X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/501d13e1c0936cc3ba3d9639620517bae34e5784..9ed6a9d779829757714f70313d29367db3821d85:/app/models/changeset.rb diff --git a/app/models/changeset.rb b/app/models/changeset.rb index ab6e05ccf..e6bde19a5 100644 --- a/app/models/changeset.rb +++ b/app/models/changeset.rb @@ -1,5 +1,33 @@ -class Changeset < ActiveRecord::Base - require 'xml/libxml' +# == Schema Information +# +# Table name: changesets +# +# id :bigint(8) not null, primary key +# user_id :bigint(8) not null +# created_at :datetime not null +# min_lat :integer +# max_lat :integer +# min_lon :integer +# max_lon :integer +# closed_at :datetime not null +# num_changes :integer default(0), not null +# +# Indexes +# +# changesets_bbox_idx (min_lat,max_lat,min_lon,max_lon) USING gist +# changesets_closed_at_idx (closed_at) +# changesets_created_at_idx (created_at) +# changesets_user_id_created_at_idx (user_id,created_at) +# changesets_user_id_id_idx (user_id,id) +# index_changesets_on_user_id_and_closed_at (user_id,closed_at) +# +# Foreign Keys +# +# changesets_user_id_fkey (user_id => users.id) +# + +class Changeset < ApplicationRecord + require "xml/libxml" belongs_to :user, :counter_cache => true @@ -11,25 +39,23 @@ class Changeset < ActiveRecord::Base has_many :old_nodes has_many :old_ways has_many :old_relations - + 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' + 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 + validates :id, :uniqueness => true, :presence => { :on => :update }, + :numericality => { :on => :update, :only_integer => true } + validates :num_changes, :presence => true, + :numericality => { :only_integer => true, + :greater_than_or_equal_to => 0 } + validates :created_at, :closed_at, :presence => true + validates :min_lat, :max_lat, :min_lon, :max_lat, :allow_nil => true, + :numericality => { :only_integer => true } 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 + MAX_ELEMENTS = 10000 # maximum time a changeset is allowed to be open for. MAX_TIME_OPEN = 1.day @@ -40,39 +66,37 @@ class Changeset < ActiveRecord::Base # Use a method like this, so that we can easily change how we # determine whether a changeset is open, without breaking code in at # least 6 controllers - def is_open? + def 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)) + (closed_at > Time.now.utc) && (num_changes <= MAX_ELEMENTS) end def set_closed_time_now - if is_open? - self.closed_at = Time.now.getutc - end + self.closed_at = Time.now.utc if open? end - def self.from_xml(xml, create=false) - begin - p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) - doc = p.parse + def self.from_xml(xml, create: false) + p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) + doc = p.parse + pt = doc.find_first("//osm/changeset") - doc.find('//osm/changeset').each do |pt| - return Changeset.from_xml_node(pt, create) - end + if pt + Changeset.from_xml_node(pt, :create => create) + else 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 + rescue LibXML::XML::Error, ArgumentError => e + raise OSM::APIBadXMLError.new("changeset", xml, e.message) end - def self.from_xml_node(pt, create=false) + def self.from_xml_node(pt, create: false) cs = Changeset.new if create - cs.created_at = Time.now.getutc + cs.created_at = Time.now.utc # initial close time is 1h ahead, but will be increased on each # modification. cs.closed_at = cs.created_at + IDLE_TIMEOUT @@ -80,13 +104,14 @@ class Changeset < ActiveRecord::Base 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']) + 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 + cs end ## @@ -96,55 +121,47 @@ class Changeset < ActiveRecord::Base @bbox ||= BoundingBox.new(min_lon, min_lat, max_lon, max_lat) end - def has_valid_bbox? + def bbox_valid? bbox.complete? end ## - # 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 - # suggested on the wiki page by kleptog. + # expand the bounding box to include the given bounding box. def update_bbox!(bbox_update) - bbox.expand!(bbox_update, EXPAND) - + bbox.expand!(bbox_update) + + raise OSM::APISizeLimitExceeded if bbox.linear_size > size_limit + # 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.to_a if bbox.complete? + self.min_lon, self.min_lat, self.max_lon, self.max_lat = @bbox.to_a.collect(&:round) 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. + # a single changeset doesn't contain too many elements. def add_changes!(elements) self.num_changes += elements end - def tags_as_hash - return tags - end - def tags unless @tags @tags = {} - self.changeset_tags.each do |tag| + changeset_tags.each do |tag| @tags[tag.k] = tag.v end end @tags end - def tags=(t) - @tags = t - end + attr_writer :tags def add_tag_keyval(k, v) - @tags = Hash.new unless @tags + @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 + raise OSM::APIDuplicateTagsError.new("changeset", id, k) if @tags.include? k @tags[k] = v end @@ -153,14 +170,14 @@ class Changeset < ActiveRecord::Base # do the changeset update and the changeset tags update in the # same transaction to ensure consistency. Changeset.transaction do - self.save! + save! tags = self.tags - ChangesetTag.delete_all(:changeset_id => self.id) + ChangesetTag.where(:changeset => id).delete_all - tags.each do |k,v| + tags.each do |k, v| tag = ChangesetTag.new - tag.changeset_id = self.id + tag.changeset_id = id tag.k = k tag.v = v tag.save! @@ -173,95 +190,47 @@ class Changeset < ActiveRecord::Base # 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 + if open? + self.closed_at = if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT) + created_at + MAX_TIME_OPEN + else + Time.now.utc + IDLE_TIMEOUT + end end end - def to_xml(include_discussion = false) - doc = OSM::API.new.get_xml_doc - doc.root << to_xml_node(nil, include_discussion) - return doc - end - - def to_xml_node(user_display_name_cache = nil, include_discussion = false) - el1 = XML::Node.new 'changeset' - el1['id'] = self.id.to_s - - user_display_name_cache = {} if user_display_name_cache.nil? - - if user_display_name_cache and user_display_name_cache.key?(self.user_id) - # use the cache if available - elsif self.user.data_public? - user_display_name_cache[self.user_id] = self.user.display_name - else - user_display_name_cache[self.user_id] = nil - end - - el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil? - el1['uid'] = self.user_id.to_s if self.user.data_public? - - self.tags.each do |k,v| - el2 = XML::Node.new('tag') - el2['k'] = k.to_s - el2['v'] = v.to_s - el1 << el2 - end - - el1['created_at'] = self.created_at.xmlschema - 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 - - # 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. - - return el1 - end - ## # update this instance from another instance given and the user who is # doing the updating. note that this method is not for updating the # 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.new - end + raise OSM::APIUserChangesetMismatchError unless user.id == user_id # can't change a closed changeset - unless is_open? - raise OSM::APIChangesetAlreadyClosedError.new(self) - end + raise OSM::APIChangesetAlreadyClosedError, self unless open? # copy the other's tags self.tags = other.tags save_with_tags! end + + def subscribe(user) + subscribers << user + end + + def unsubscribe(user) + subscribers.delete(user) + end + + def subscribed?(user) + subscribers.exists?(user.id) + end + + def size_limit + @size_limit ||= ActiveRecord::Base.connection.select_value( + "SELECT api_size_limit($1)", "api_size_limit", [user_id] + ) + end end