X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/94a48482e0bef11bdaf11f0200b4296ee8fabf23..d104736809d9e36b0bc955f3425c4d47a370e78b:/app/controllers/changesets_controller.rb diff --git a/app/controllers/changesets_controller.rb b/app/controllers/changesets_controller.rb index e4fd593d7..fef4d85eb 100644 --- a/app/controllers/changesets_controller.rb +++ b/app/controllers/changesets_controller.rb @@ -1,256 +1,21 @@ # The ChangesetController is the RESTful interface to Changeset objects class ChangesetsController < ApplicationController + include UserMethods + layout "site" require "xml/libxml" - skip_before_action :verify_authenticity_token, :except => [:index] - before_action :authorize_web, :only => [:index, :feed] - before_action :set_locale, :only => [:index, :feed] - before_action :authorize, :only => [:create, :update, :upload, :close, :subscribe, :unsubscribe] - before_action :require_allow_write_api, :only => [:create, :update, :upload, :close, :subscribe, :unsubscribe] - before_action :require_public_data, :only => [:create, :update, :upload, :close, :subscribe, :unsubscribe] - before_action :check_api_writable, :only => [:create, :update, :upload, :subscribe, :unsubscribe] - before_action :check_api_readable, :except => [:create, :update, :upload, :download, :query, :index, :feed, :subscribe, :unsubscribe] - before_action(:only => [:index, :feed]) { |c| c.check_database_readable(true) } - around_action :api_call_handle_error, :except => [:index, :feed] - around_action :api_call_timeout, :except => [:index, :feed, :upload] - around_action :web_timeout, :only => [:index, :feed] - - # Helper methods for checking consistency - include ConsistencyValidations - - # Create a changeset from XML. - def create - assert_method :put - - cs = Changeset.from_xml(request.raw_post, true) - - # Assume that Changeset.from_xml has thrown an exception if there is an error parsing the xml - cs.user = current_user - cs.save_with_tags! - - # Subscribe user to changeset comments - cs.subscribers << current_user - - render :plain => cs.id.to_s - 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 - changeset = Changeset.find(params[:id]) - - render :xml => changeset.to_xml(params[:include_discussion].presence).to_s - end - - ## - # marks a changeset as closed. this may be called multiple times - # on the same changeset, so is idempotent. - def close - assert_method :put - - changeset = Changeset.find(params[:id]) - check_changeset_consistency(changeset, current_user) - - # 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.save! - head :ok - end - - ## - # insert a (set of) points into a changeset bounding box. this can only - # 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 expand_bbox - # only allow POST requests, because although this method is - # idempotent, there is no "document" to PUT really... - assert_method :post - - cs = Changeset.find(params[:id]) - check_changeset_consistency(cs, current_user) - - # keep an array of lons and lats - lon = [] - lat = [] - - # the request is in pseudo-osm format... this is kind-of an - # abuse, maybe should change to some other format? - doc = XML::Parser.string(request.raw_post, :options => XML::Parser::Options::NOERROR).parse - doc.find("//osm/node").each do |n| - 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 - lon << cs.min_lon unless cs.min_lon.nil? - lat << cs.min_lat unless cs.min_lat.nil? - lon << cs.max_lon unless cs.max_lon.nil? - lat << cs.max_lat unless cs.max_lat.nil? - - # collapse the arrays to minimum and maximum - cs.min_lon = lon.min - cs.min_lat = lat.min - cs.max_lon = lon.max - cs.max_lat = lat.max - - # save the larger bounding box and return the changeset, which - # will include the bigger bounding box. - cs.save! - render :xml => cs.to_xml.to_s - end - - ## - # Upload a diff in a single transaction. - # - # This means that each change within the diff must succeed, i.e: that - # each version number mentioned is still current. Otherwise the entire - # transaction *must* be rolled back. - # - # Furthermore, each element in the diff can only reference the current - # changeset. - # - # Returns: a diffResult document, as described in - # http://wiki.openstreetmap.org/wiki/OSM_Protocol_Version_0.6 - def upload - # only allow POST requests, as the upload method is most definitely - # not idempotent, as several uploads with placeholder IDs will have - # different side-effects. - # see http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.1.2 - assert_method :post - - changeset = Changeset.find(params[:id]) - check_changeset_consistency(changeset, current_user) + before_action :authorize_web + before_action :set_locale + before_action -> { check_database_readable(:need_api => true) }, :only => [:index, :feed] - diff_reader = DiffReader.new(request.raw_post, changeset) - Changeset.transaction do - result = diff_reader.commit - render :xml => result.to_s - end - end - - ## - # download the changeset as an osmChange document. - # - # to make it easier to revert diffs it would be better if the osmChange - # format were reversible, i.e: contained both old and new versions of - # modified elements. but it doesn't at the moment... - # - # this method cannot order the database changes fully (i.e: timestamp and - # version number may be too coarse) so the resulting diff may not apply - # to a different database. however since changesets are not atomic this - # behaviour cannot be guaranteed anyway and is the result of a design - # choice. - def download - changeset = Changeset.find(params[:id]) + authorize_resource - # get all the elements in the changeset which haven't been redacted - # and stick them in a big array. - elements = [changeset.old_nodes.unredacted, - changeset.old_ways.unredacted, - changeset.old_relations.unredacted].flatten - - # sort the elements by timestamp and version number, as this is the - # almost sensible ordering available. this would be much nicer if - # global (SVN-style) versioning were used - then that would be - # unambiguous. - elements.sort! do |a, b| - if a.timestamp == b.timestamp - a.version <=> b.version - else - a.timestamp <=> b.timestamp - end - end - - # create changeset and user caches - changeset_cache = {} - user_display_name_cache = {} - - # create an osmChange document for the output - result = OSM::API.new.get_xml_doc - result.root.name = "osmChange" - - # generate an output element for each operation. note: we avoid looking - # at the history because it is simpler - but it would be more correct to - # check these assertions. - elements.each do |elt| - result.root << - if elt.version == 1 - # first version, so it must be newly-created. - created = XML::Node.new "create" - created << elt.to_xml_node(changeset_cache, user_display_name_cache) - elsif elt.visible - # must be a modify - modified = XML::Node.new "modify" - modified << elt.to_xml_node(changeset_cache, user_display_name_cache) - else - # if the element isn't visible then it must have been deleted - deleted = XML::Node.new "delete" - deleted << elt.to_xml_node(changeset_cache, user_display_name_cache) - end - end - - render :xml => result.to_s - end - - ## - # query changesets by bounding box, time, user or open/closed status. - def query - # find any bounding box - bbox = BoundingBox.from_bbox_params(params) if params["bbox"] - - # create the conditions that the user asked for. some or all of - # these may be nil. - changesets = Changeset.all - changesets = conditions_bbox(changesets, bbox) - changesets = conditions_user(changesets, params["user"], params["display_name"]) - changesets = conditions_time(changesets, params["time"]) - changesets = conditions_open(changesets, params["open"]) - changesets = conditions_closed(changesets, params["closed"]) - changesets = conditions_ids(changesets, params["changesets"]) - - # sort and limit the changesets - changesets = changesets.order("created_at DESC").limit(100) - - # preload users, tags and comments - changesets = changesets.preload(:user, :changeset_tags, :comments) - - # create the results document - results = OSM::API.new.get_xml_doc - - # add all matching changesets to the XML results document - changesets.order("created_at DESC").limit(100).each do |cs| - results.root << cs.to_xml_node - end - - render :xml => results.to_s - 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. - assert_method :put + around_action :web_timeout - changeset = Changeset.find(params[:id]) - new_changeset = Changeset.from_xml(request.raw_post) - - check_changeset_consistency(changeset, current_user) - changeset.update_from(new_changeset, current_user) - render :xml => changeset.to_xml.to_s - end + # Helper methods for checking consistency + include ConsistencyValidations ## # list non-empty changesets in reverse chronological order @@ -283,21 +48,21 @@ class ChangesetsController < ApplicationController if @params[:display_name] changesets = if user.data_public? || user == current_user - changesets.where(:user_id => user.id) + changesets.where(:user => user) else changesets.where("false") end elsif @params[:bbox] changesets = conditions_bbox(changesets, BoundingBox.from_bbox_params(params)) elsif @params[:friends] && current_user - changesets = changesets.where(:user_id => current_user.friend_users.identifiable) + changesets = changesets.where(:user => current_user.friends.identifiable) elsif @params[:nearby] && current_user - changesets = changesets.where(:user_id => current_user.nearby) + changesets = changesets.where(:user => current_user.nearby) end changesets = changesets.where("changesets.id <= ?", @params[:max_id]) if @params[:max_id] - @edits = changesets.order("changesets.id DESC").limit(20).preload(:user, :changeset_tags, :comments) + @changesets = changesets.order("changesets.id DESC").limit(20).preload(:user, :changeset_tags, :comments) render :action => :index, :layout => false end @@ -309,46 +74,6 @@ class ChangesetsController < ApplicationController index end - ## - # Adds a subscriber to the changeset - def subscribe - # Check the arguments are sane - raise OSM::APIBadUserInput, "No id was given" unless params[:id] - - # Extract the arguments - id = params[:id].to_i - - # Find the changeset and check it is valid - changeset = Changeset.find(id) - raise OSM::APIChangesetAlreadySubscribedError, changeset if changeset.subscribers.exists?(current_user.id) - - # Add the subscriber - changeset.subscribers << current_user - - # Return a copy of the updated changeset - render :xml => changeset.to_xml.to_s - end - - ## - # Removes a subscriber from the changeset - def unsubscribe - # Check the arguments are sane - raise OSM::APIBadUserInput, "No id was given" unless params[:id] - - # Extract the arguments - id = params[:id].to_i - - # Find the changeset and check it is valid - changeset = Changeset.find(id) - raise OSM::APIChangesetNotSubscribedError, changeset unless changeset.subscribers.exists?(current_user.id) - - # Remove the subscriber - changeset.subscribers.delete(current_user) - - # Return a copy of the updated changeset - render :xml => changeset.to_xml.to_s - end - private #------------------------------------------------------------ @@ -372,109 +97,6 @@ class ChangesetsController < ApplicationController end end - ## - # restrict changesets to those by a particular user - def conditions_user(changesets, user, name) - if user.nil? && name.nil? - changesets - else - # shouldn't provide both name and UID - raise OSM::APIBadUserInput, "provide either the user ID or display name, but not both" if user && name - - # use either the name or the UID to find the user which we're selecting on. - u = if name.nil? - # user input checking, we don't have any UIDs < 1 - raise OSM::APIBadUserInput, "invalid user ID" if user.to_i < 1 - - u = User.find(user.to_i) - else - u = User.find_by(:display_name => name) - end - - # make sure we found a user - raise OSM::APINotFoundError if u.nil? - - # 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 current_user.nil? || current_user != u - end - - changesets.where(:user_id => u.id) - end - end - - ## - # restrict changes to those closed during a particular time period - def conditions_time(changesets, time) - if time.nil? - changesets - elsif time.count(",") == 1 - # if there is a range, i.e: comma separated, then the first is - # low, second is high - same as with bounding boxes. - - # check that we actually have 2 elements in the array - times = time.split(/,/) - raise OSM::APIBadUserInput, "bad time range" if times.size != 2 - - from, to = times.collect { |t| Time.parse(t) } - changesets.where("closed_at >= ? and created_at <= ?", from, to) - else - # if there is no comma, assume its a lower limit on time - changesets.where("closed_at >= ?", Time.parse(time)) - end - # stupid Time 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, ex.message.to_s - rescue RuntimeError => ex - raise OSM::APIBadUserInput, ex.message.to_s - end - - ## - # return changesets which are open (haven't been closed yet) - # we do this by seeing if the 'closed at' time is in the future. Also if we've - # hit the maximum number of changes then it counts as no longer open. - # if parameter 'open' is nill then open and closed changesets are returned - def conditions_open(changesets, open) - if open.nil? - changesets - else - changesets.where("closed_at >= ? and num_changes <= ?", - Time.now.getutc, Changeset::MAX_ELEMENTS) - end - end - - ## - # query changesets which are closed - # ('closed at' time has passed or changes limit is hit) - def conditions_closed(changesets, closed) - if closed.nil? - changesets - else - changesets.where("closed_at < ? or num_changes > ?", - Time.now.getutc, Changeset::MAX_ELEMENTS) - end - end - - ## - # query changesets by a list of ids - # (either specified as array or comma-separated string) - def conditions_ids(changesets, ids) - if ids.nil? - changesets - elsif ids.empty? - raise OSM::APIBadUserInput, "No changesets were given to search for" - else - ids = ids.split(",").collect(&:to_i) - changesets.where(:id => ids) - end - end - ## # eliminate empty changesets (where the bbox has not been set) # this should be applied to all changeset list displays