X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/c760891d634eff7b95b98d2bd88fc0d5535220bb..e5674abd2c9b0359b06c281804f7286e22b9a258:/app/controllers/changeset_controller.rb diff --git a/app/controllers/changeset_controller.rb b/app/controllers/changeset_controller.rb index 9152df816..f7f4dc9f0 100644 --- a/app/controllers/changeset_controller.rb +++ b/app/controllers/changeset_controller.rb @@ -2,13 +2,19 @@ class ChangesetController < ApplicationController require 'xml/libxml' - require 'diff_reader' - before_filter :authorize, :only => [:create, :update, :delete, :upload, :include] + session :off + before_filter :authorize, :only => [:create, :update, :delete, :upload, :include, :close] before_filter :check_write_availability, :only => [:create, :update, :delete, :upload, :include] - before_filter :check_read_availability, :except => [:create, :update, :delete, :upload, :download] + before_filter :check_read_availability, :except => [:create, :update, :delete, :upload, :download, :query] after_filter :compress_output + # Help methods for checking boundary sanity and area size + include MapBoundary + + # Helper methods for checking consistency + include ConsistencyValidations + # Create a changeset from XML. def create if request.put? @@ -26,6 +32,9 @@ class ChangesetController < ApplicationController end end + ## + # Return XML giving the basic info about the changeset. Does not + # return anything about the nodes, ways and relations in the changeset. def read begin changeset = Changeset.find(params[:id]) @@ -35,25 +44,29 @@ class ChangesetController < ApplicationController end end + ## + # marks a changeset as closed. this may be called multiple times + # on the same changeset, so is idempotent. def close - begin - unless request.put? - render :nothing => true, :status => :method_not_allowed - return - end - - changeset = Changeset.find(params[:id]) + unless request.put? + render :nothing => true, :status => :method_not_allowed + return + end + + changeset = Changeset.find(params[:id]) + check_changeset_consistency(changeset, @user) - unless @user.id == changeset.user_id - raise OSM::APIUserChangesetMismatchError - end + # to close the changeset, we'll just set its closed_at time to + # now. this might not be enough if there are concurrency issues, + # but we'll have to wait and see. + changeset.set_closed_time_now - changeset.open = false - changeset.save! - render :nothing => true - rescue ActiveRecord::RecordNotFound - render :nothing => true, :status => :not_found - end + changeset.save! + render :nothing => true + rescue ActiveRecord::RecordNotFound + render :nothing => true, :status => :not_found + rescue OSM::APIError => ex + render ex.render_opts end ## @@ -61,17 +74,12 @@ class ChangesetController < ApplicationController # increase the size of the bounding box. this is a hint that clients can # set either before uploading a large number of changes, or changes that # the client (but not the server) knows will affect areas further away. - def include + def expand_bbox # only allow POST requests, because although this method is # idempotent, there is no "document" to PUT really... if request.post? cs = Changeset.find(params[:id]) - - # check user credentials - only the user who opened a changeset - # may alter it. - unless @user.id == changeset.user_id - raise OSM::APIUserChangesetMismatchError - end + check_changeset_consistency(cs, @user) # keep an array of lons and lats lon = Array.new @@ -81,8 +89,8 @@ class ChangesetController < ApplicationController # abuse, maybe should change to some other format? doc = XML::Parser.string(request.raw_post).parse doc.find("//osm/node").each do |n| - lon << n['lon'].to_f * SCALE - lat << n['lat'].to_f * SCALE + lon << n['lon'].to_f * GeoRecord::SCALE + lat << n['lat'].to_f * GeoRecord::SCALE end # add the existing bounding box to the lon-lat array @@ -132,13 +140,8 @@ class ChangesetController < ApplicationController return end - # access control - only the user who created a changeset may - # upload to it. - unless @user.id == changeset.user_id - raise OSM::APIUserChangesetMismatchError - end - changeset = Changeset.find(params[:id]) + check_changeset_consistency(changeset, @user) diff_reader = DiffReader.new(request.raw_post, changeset) Changeset.transaction do @@ -224,4 +227,159 @@ class ChangesetController < ApplicationController render ex.render_opts end + ## + # query changesets by bounding box, time, user or open/closed status. + def query + # create the conditions that the user asked for. some or all of + # these may be nil. + conditions = conditions_bbox(params['bbox']) + conditions = cond_merge conditions, conditions_user(params['user']) + conditions = cond_merge conditions, conditions_time(params['time']) + conditions = cond_merge conditions, conditions_open(params['open']) + + # create the results document + results = OSM::API.new.get_xml_doc + + # add all matching changesets to the XML results document + Changeset.find(:all, + :conditions => conditions, + :limit => 100, + :order => 'created_at desc').each do |cs| + results.root << cs.to_xml_node + end + + render :text => results.to_s, :content_type => "text/xml" + + rescue ActiveRecord::RecordNotFound + render :nothing => true, :status => :not_found + rescue OSM::APIError => ex + render ex.render_opts + end + + ## + # updates a changeset's tags. none of the changeset's attributes are + # user-modifiable, so they will be ignored. + # + # changesets are not (yet?) versioned, so we don't have to deal with + # history tables here. changesets are locked to a single user, however. + # + # after succesful update, returns the XML of the changeset. + def update + # request *must* be a PUT. + unless request.put? + render :nothing => true, :status => :method_not_allowed + return + end + + changeset = Changeset.find(params[:id]) + new_changeset = Changeset.from_xml(request.raw_post) + + unless new_changeset.nil? + check_changeset_consistency(changeset, @user) + changeset.update_from(new_changeset, @user) + render :text => changeset.to_xml, :mime_type => "text/xml" + else + + render :nothing => true, :status => :bad_request + end + + rescue ActiveRecord::RecordNotFound + render :nothing => true, :status => :not_found + rescue OSM::APIError => ex + render ex.render_opts + end + +private + #------------------------------------------------------------ + # utility functions below. + #------------------------------------------------------------ + + ## + # merge two conditions + def cond_merge(a, b) + if a and b + a_str = a.shift + b_str = b.shift + return [ a_str + " and " + b_str ] + a + b + elsif a + return a + else b + return b + end + end + + ## + # if a bounding box was specified then parse it and do some sanity + # checks. this is mostly the same as the map call, but without the + # area restriction. + def conditions_bbox(bbox) + unless bbox.nil? + raise OSM::APIBadUserInput.new("Bounding box should be min_lon,min_lat,max_lon,max_lat") unless bbox.count(',') == 3 + bbox = sanitise_boundaries(bbox.split(/,/)) + raise OSM::APIBadUserInput.new("Minimum longitude should be less than maximum.") unless bbox[0] <= bbox[2] + raise OSM::APIBadUserInput.new("Minimum latitude should be less than maximum.") unless bbox[1] <= bbox[3] + return ['min_lon < ? and max_lon > ? and min_lat < ? and max_lat > ?', + bbox[2] * GeoRecord::SCALE, bbox[0] * GeoRecord::SCALE, bbox[3]* GeoRecord::SCALE, bbox[1] * GeoRecord::SCALE] + else + return nil + end + end + + ## + # restrict changesets to those by a particular user + def conditions_user(user) + unless user.nil? + # user input checking, we don't have any UIDs < 1 + raise OSM::APIBadUserInput.new("invalid user ID") if user.to_i < 1 + + u = User.find(user.to_i) + # should be able to get changesets of public users only, or + # our own changesets regardless of public-ness. + unless u.data_public? + # get optional user auth stuff so that users can see their own + # changesets if they're non-public + setup_user_auth + + raise OSM::APINotFoundError if @user.nil? or @user.id != u.id + end + return ['user_id = ?', u.id] + else + return nil + end + end + + ## + # restrict changes to those during a particular time period + def conditions_time(time) + unless time.nil? + # if there is a range, i.e: comma separated, then the first is + # low, second is high - same as with bounding boxes. + if time.count(',') == 1 + # check that we actually have 2 elements in the array + times = time.split(/,/) + raise OSM::APIBadUserInput.new("bad time range") if times.size != 2 + + from, to = times.collect { |t| DateTime.parse(t) } + return ['closed_at >= ? and created_at <= ?', from, to] + else + # if there is no comma, assume its a lower limit on time + return ['closed_at >= ?', DateTime.parse(time)] + end + else + return nil + end + # stupid DateTime seems to throw both of these for bad parsing, so + # we have to catch both and ensure the correct code path is taken. + rescue ArgumentError => ex + raise OSM::APIBadUserInput.new(ex.message.to_s) + rescue RuntimeError => ex + raise OSM::APIBadUserInput.new(ex.message.to_s) + end + + ## + # restrict changes to those which are open + def conditions_open(open) + return open.nil? ? nil : ['closed_at >= ?', DateTime.now] + end + end