X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/62a1ec47483803a32c038fb2907afdf45a61b5ee..4826032d183932312d635193c9d3acef6107f280:/app/controllers/amf_controller.rb?ds=sidebyside diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 4ec4e660e..20053644d 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -3,545 +3,991 @@ # OSM database takes place using this controller. Messages are # encoded in the Actionscript Message Format (AMF). # -# Helper functions are in /lib/potlatch. +# Helper functions are in /lib/potlatch.rb # # Author:: editions Systeme D / Richard Fairhurst 2004-2008 # Licence:: public domain. # # == General structure # -# Apart from the talk method (which distributes the requests from the -# AMF message), each method generally takes arguments in the order they were -# sent by the Potlatch SWF. Do not assume typing has been preserved. Methods -# all return an array to the SWF. +# Apart from the amf_read and amf_write methods (which distribute the requests +# from the AMF message), each method generally takes arguments in the order +# they were sent by the Potlatch SWF. Do not assume typing has been preserved. +# Methods all return an array to the SWF. +# +# == API 0.6 +# +# Note that this requires a patched version of composite_primary_keys 1.1.0 +# (see http://groups.google.com/group/compositekeys/t/a00e7562b677e193) +# if you are to run with POTLATCH_USE_SQL=false . # # == Debugging # # Any method that returns a status code (0 for ok) can also send: -# return(-1,"message") <-- just puts up a dialogue -# return(-2,"message") <-- also asks the user to e-mail me +# return(-1,"message") <-- just puts up a dialogue +# return(-2,"message") <-- also asks the user to e-mail me +# return(-3,["type",v],id) <-- version conflict +# return(-4,"type",id) <-- object not found +# -5 indicates the method wasn't called (due to a previous error) # -# To write to the Rails log, use RAILS_DEFAULT_LOGGER.info("message"). -# -# == To do -# -# - Check authentication -# - Check the right things are being written to the database! +# To write to the Rails log, use logger.info("message"). + +# Remaining issues: +# * version conflict when POIs and ways are reverted class AmfController < ApplicationController require 'stringio' include Potlatch - session :off - before_filter :check_write_availability + # Help methods for checking boundary sanity and area size + include MapBoundary - # Main AMF handler: processes the raw AMF string (using AMF library) and + before_filter :check_api_writable + + # Main AMF handlers: process the raw AMF string (using AMF library) and # calls each action (private method) accordingly. + # ** FIXME: refactor to reduce duplication of code across read/write - def talk - req=StringIO.new(request.raw_post+0.chr) # Get POST data as request - # (cf http://www.ruby-forum.com/topic/122163) - req.read(2) # Skip version indicator and client ID - results={} # Results of each body - renumberednodes={} # Shared across repeated putways - renumberedways={} # Shared across repeated putways - - # Parse request - - headers=AMF.getint(req) # Read number of headers - - headers.times do # Read each header - name=AMF.getstring(req) # | - req.getc # | skip boolean - value=AMF.getvalue(req) # | - header["name"]=value # | - end - - bodies=AMF.getint(req) # Read number of bodies - bodies.times do # Read each body - message=AMF.getstring(req) # | get message name - index=AMF.getstring(req) # | get index in response sequence - bytes=AMF.getlong(req) # | get total size in bytes - args=AMF.getvalue(req) # | get response (probably an array) - - case message - when 'getpresets'; results[index]=AMF.putdata(index,getpresets()) - when 'whichways'; results[index]=AMF.putdata(index,whichways(*args)) - when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args)) - when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i)) - when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i)) - when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1].to_i)) - when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i)) - when 'putway'; r=putway(renumberednodes,*args) - renumberednodes=r[3] - if r[1] != r[2] - renumberedways[r[1]] = r[2] - end - results[index]=AMF.putdata(index,r) - when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args)) - when 'deleteway'; results[index]=AMF.putdata(index,deleteway(args[0],args[1].to_i)) - when 'putpoi'; results[index]=AMF.putdata(index,putpoi(*args)) - when 'getpoi'; results[index]=AMF.putdata(index,getpoi(args[0].to_i)) - end - end - - # Write out response - - a,b=results.length.divmod(256) - render :content_type => "application/x-amf", :text => proc { |response, output| - output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr - results.each do |k,v| - output.write(v) - end - } + def amf_read + if request.post? + req=StringIO.new(request.raw_post+0.chr)# Get POST data as request + # (cf http://www.ruby-forum.com/topic/122163) + req.read(2) # Skip version indicator and client ID + results={} # Results of each body + + # Parse request + + headers=AMF.getint(req) # Read number of headers + + headers.times do # Read each header + name=AMF.getstring(req) # | + req.getc # | skip boolean + value=AMF.getvalue(req) # | + header["name"]=value # | + end + + bodies=AMF.getint(req) # Read number of bodies + bodies.times do # Read each body + message=AMF.getstring(req) # | get message name + index=AMF.getstring(req) # | get index in response sequence + bytes=AMF.getlong(req) # | get total size in bytes + args=AMF.getvalue(req) # | get response (probably an array) + logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}") + + case message + when 'getpresets'; results[index]=AMF.putdata(index,getpresets(*args)) + when 'whichways'; results[index]=AMF.putdata(index,whichways(*args)) + when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args)) + when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i)) + when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i)) + when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1])) + when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i)) + when 'getnode_history'; results[index]=AMF.putdata(index,getnode_history(args[0].to_i)) + when 'findgpx'; results[index]=AMF.putdata(index,findgpx(*args)) + when 'findrelations'; results[index]=AMF.putdata(index,findrelations(*args)) + when 'getpoi'; results[index]=AMF.putdata(index,getpoi(*args)) + end + end + logger.info("Encoding AMF results") + sendresponse(results) + else + render :nothing => true, :status => :method_not_allowed + end + end + + def amf_write + if request.post? + req=StringIO.new(request.raw_post+0.chr) + req.read(2) + results={} + renumberednodes={} # Shared across repeated putways + renumberedways={} # Shared across repeated putways + + headers=AMF.getint(req) # Read number of headers + headers.times do # Read each header + name=AMF.getstring(req) # | + req.getc # | skip boolean + value=AMF.getvalue(req) # | + header["name"]=value # | + end + + bodies=AMF.getint(req) # Read number of bodies + bodies.times do # Read each body + message=AMF.getstring(req) # | get message name + index=AMF.getstring(req) # | get index in response sequence + bytes=AMF.getlong(req) # | get total size in bytes + args=AMF.getvalue(req) # | get response (probably an array) + err=false # Abort batch on error + + logger.info("Executing AMF #{message}:#{index}") + if err + results[index]=[-5,nil] + else + case message + when 'putway'; orn=renumberednodes.dup + r=putway(renumberednodes,*args) + r[4]=renumberednodes.reject { |k,v| orn.has_key?(k) } + if r[2] != r[3] then renumberedways[r[2]] = r[3] end + results[index]=AMF.putdata(index,r) + when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args)) + when 'deleteway'; results[index]=AMF.putdata(index,deleteway(*args)) + when 'putpoi'; r=putpoi(*args) + if r[2] != r[3] then renumberednodes[r[2]] = r[3] end + results[index]=AMF.putdata(index,r) + when 'startchangeset'; results[index]=AMF.putdata(index,startchangeset(*args)) + end + if results[index][0]==-3 then err=true end # If a conflict is detected, don't execute any more writes + end + end + logger.info("Encoding AMF results") + sendresponse(results) + else + render :nothing => true, :status => :method_not_allowed + end end private + def amf_handle_error(call) + yield + rescue OSM::APIVersionMismatchError => ex + return [-3, [ex.type.downcase, ex.latest, ex.id]] + rescue OSM::APIUserChangesetMismatchError => ex + return [-2, ex.to_s] + rescue OSM::APIBadBoundingBox => ex + return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"] + rescue OSM::APIError => ex + return [-1, ex.to_s] + rescue Exception => ex + return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"] + end + + def amf_handle_error_with_timeout(call) + amf_handle_error(call) do + Timeout::timeout(APP_CONFIG['api_timeout'], OSM::APITimeoutError) do + yield + end + end + end + + # Start new changeset + # Returns success_code,success_message,changeset id + + def startchangeset(usertoken, cstags, closeid, closecomment, opennew) + amf_handle_error("'startchangeset'") do + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end + + # close previous changeset and add comment + if closeid + cs = Changeset.find(closeid) + cs.set_closed_time_now + if cs.user_id!=user.id + raise OSM::APIUserChangesetMismatchError.new + elsif closecomment.empty? + cs.save! + else + cs.tags['comment']=closecomment + cs.save_with_tags! + end + end + + # open a new changeset + if opennew!=0 + cs = Changeset.new + cs.tags = cstags + cs.user_id = user.id + if !closecomment.empty? then cs.tags['comment']=closecomment end + # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better + cs.created_at = Time.now.getutc + cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT + cs.save_with_tags! + return [0,'',cs.id] + else + return [0,'',nil] + end + end + end + # Return presets (default tags, localisation etc.): # uses POTLATCH_PRESETS global, set up in OSM::Potlatch. - def getpresets() #:doc: - return POTLATCH_PRESETS + def getpresets(usertoken,lang) #:doc: + user = getuser(usertoken) + + if user && !user.languages.empty? + request.user_preferred_languages = user.languages + end + + lang = request.compatible_language_from(getlocales) + + begin + # if not, try the browser language + localised = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/localised.yaml")) + rescue + # fall back to hardcoded English text + localised = "" + end + + begin + help = File.read("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/help.html") + rescue + help = File.read("#{RAILS_ROOT}/config/potlatch/localised/en/help.html") + end + return POTLATCH_PRESETS+[localised,help] end + ## # Find all the ways, POI nodes (i.e. not part of ways), and relations # in a given bounding box. Nodes are returned in full; ways and relations # are IDs only. - - def whichways(xmin,ymin,xmax,ymax) #:doc: - xmin-=0.01; ymin-=0.01 - xmax+=0.01; ymax+=0.01 - - if POTLATCH_USE_SQL then - way_ids=sql_find_way_ids_in_area(xmin,ymin,xmax,ymax) - points=sql_find_pois_in_area(xmin,ymin,xmax,ymax) - relation_ids=sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids) - else - # find the way ids in an area - nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => "current_nodes.visible = 1", :include => :ways) - way_ids = nodes_in_area.collect { |node| node.way_ids }.flatten.uniq - - # find the node ids in an area that aren't part of ways - nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? } - points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags_as_hash] } - - # find the relations used by those nodes and ways - relations = nodes_in_area.collect { |node| node.containing_relations.visible }.flatten + - way_ids.collect { |id| Way.find(id).containing_relations.visible }.flatten - relation_ids = relations.collect { |relation| relation.id }.uniq - end - - [way_ids,points,relation_ids] + # + # return is of the form: + # [success_code, success_message, + # [[way_id, way_version], ...], + # [[node_id, lat, lon, [tags, ...], node_version], ...], + # [[rel_id, rel_version], ...]] + # where the ways are any visible ways which refer to any visible + # nodes in the bbox, nodes are any visible nodes in the bbox but not + # used in any way, rel is any relation which refers to either a way + # or node that we're returning. + def whichways(xmin, ymin, xmax, ymax) #:doc: + amf_handle_error_with_timeout("'whichways'") do + enlarge = [(xmax-xmin)/8,0.01].min + xmin -= enlarge; ymin -= enlarge + xmax += enlarge; ymax += enlarge + + # check boundary is sane and area within defined + # see /config/application.yml + check_boundaries(xmin, ymin, xmax, ymax) + + if POTLATCH_USE_SQL then + ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax) + points = sql_find_pois_in_area(xmin, ymin, xmax, ymax) + relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]}) + else + # find the way ids in an area + nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways) + ways = nodes_in_area.inject([]) { |sum, node| + visible_ways = node.ways.select { |w| w.visible? } + sum + visible_ways.collect { |w| [w.id,w.version] } + }.uniq + ways.delete([]) + + # find the node ids in an area that aren't part of ways + nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? } + points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq + + # find the relations used by those nodes and ways + relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) + + Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true}) + relations = relations.collect { |relation| [relation.id,relation.version] }.uniq + end + + [0, '', ways, points, relations] + end end # Find deleted ways in current bounding box (similar to whichways, but ways # with a deleted node only - not POIs or relations). - def whichways_deleted(xmin,ymin,xmax,ymax) #:doc: - xmin-=0.01; ymin-=0.01 - xmax+=0.01; ymax+=0.01 + def whichways_deleted(xmin, ymin, xmax, ymax) #:doc: + amf_handle_error_with_timeout("'whichways_deleted'") do + enlarge = [(xmax-xmin)/8,0.01].min + xmin -= enlarge; ymin -= enlarge + xmax += enlarge; ymax += enlarge + + # check boundary is sane and area within defined + # see /config/application.yml + check_boundaries(xmin, ymin, xmax, ymax) - nodes_in_area = Node.find_by_area(ymin, xmin, ymax,xmax, :conditions => "current_nodes.visible=0 AND current_ways.visible=0", :include => :ways_via_history ) - way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq - [way_ids] + nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history) + way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq + + [0,'',way_ids] + end end # Get a way including nodes and tags. - # Returns 0 (success), a Potlatch-style array of points, and a hash of tags. + # Returns the way id, a Potlatch-style array of points, a hash of tags, the version number, and the user ID. def getway(wayid) #:doc: - if POTLATCH_USE_SQL then - points=sql_get_nodes_in_way(wayid) - tags=sql_get_tags_in_way(wayid) - else - # Ideally we would do ":include => :nodes" here but if we do that - # then rails only seems to return the first copy of a node when a - # way includes a node more than once - points = [] - way = Way.find(wayid) - way.nodes.each do |node| - points << [node.lon, node.lat, node.id, nil, node.tags_as_hash] - end - tags=way.tags - end - [wayid,points,tags] + amf_handle_error_with_timeout("'getway' #{wayid}") do + if POTLATCH_USE_SQL then + points = sql_get_nodes_in_way(wayid) + tags = sql_get_tags_in_way(wayid) + version = sql_get_way_version(wayid) + uid = sql_get_way_user(wayid) + else + # Ideally we would do ":include => :nodes" here but if we do that + # then rails only seems to return the first copy of a node when a + # way includes a node more than once + way = Way.find(:first, :conditions => { :id => wayid }, :include => { :nodes => :node_tags }) + + # check case where way has been deleted or doesn't exist + return [-4, 'way', wayid, [], {}, nil] if way.nil? or !way.visible + + points = way.nodes.collect do |node| + nodetags=node.tags + nodetags.delete('created_by') + [node.lon, node.lat, node.id, nodetags, node.version] + end + tags = way.tags + version = way.version + uid = way.changeset.user.id + end + + [0, '', wayid, points, tags, version, uid] + end end - + # Get an old version of a way, and all constituent nodes. # - # For undelete (version=0), always uses the most recent version of each node, - # even if it's moved. For revert (version=1+), uses the node in existence + # For undelete (version<0), always uses the most recent version of each node, + # even if it's moved. For revert (version >= 0), uses the node in existence # at the time, generating a new id if it's still visible and has been moved/ # retagged. - - def getway_old(id,version) #:doc: - if version<0 - old_way = OldWay.find(:first, :conditions => ['visible=1 AND id=?', id], :order => 'version DESC') - points = old_way.get_nodes_undelete - else - old_way = OldWay.find(:first, :conditions => ['id=? AND version=?', id, version]) - points = old_way.get_nodes_revert - end - old_way.tags['history']="Retrieved from v#{old_way.version}" - [0,id,points,old_way.tags,old_way.version] + # + # Returns: + # 0. success code, + # 1. id, + # 2. array of points, + # 3. hash of tags, + # 4. version, + # 5. is this the current, visible version? (boolean) + + def getway_old(id, timestamp) #:doc: + amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}") do + if timestamp == '' + # undelete + old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC') + points = old_way.get_nodes_undelete unless old_way.nil? + else + begin + # revert + timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S") + old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC') + unless old_way.nil? + points = old_way.get_nodes_revert(timestamp) + if !old_way.visible + return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id, [], {}, nil, false] + end + end + rescue ArgumentError + # thrown by date parsing method. leave old_way as nil for + # the error handler below. + end + end + + if old_way.nil? + return [-1, "Sorry, the server could not find a way at that time.", id, [], {}, nil, false] + else + curway=Way.find(id) + old_way.tags['history'] = "Retrieved from v#{old_way.version}" + return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)] + end + end end - # Find history of a way. Returns an array of previous versions. + # Find history of a way. + # Returns 'way', id, and an array of previous versions: + # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid] + # - now [timestamp,user,uid] + # + # Heuristic: Find all nodes that have ever been part of the way; + # get a list of their revision dates; add revision dates of the way; + # sort and collapse list (to within 2 seconds); trim all dates before the + # start date of the way. def getway_history(wayid) #:doc: - history=[] - way=Way.find(wayid) - way.old_ways.each do |old_way| - if old_way.user.data_public then user=old_way.user.display_name else user='anonymous' end - history<<[old_way.version,old_way.timestamp.strftime("%d %b %Y, %H:%M"),old_way.visible ? 1 : 0,user] - end - [history] + begin + # Find list of revision dates for way and all constituent nodes + revdates=[] + revusers={} + Way.find(wayid).old_ways.collect do |a| + revdates.push(a.timestamp) + unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end + a.nds.each do |n| + Node.find(n).old_nodes.collect do |o| + revdates.push(o.timestamp) + unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end + end + end + end + waycreated=revdates[0] + revdates.uniq! + revdates.sort! + revdates.reverse! + + # Remove any dates (from nodes) before first revision date of way + revdates.delete_if { |d| d0 then + gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] ) + if gpx then + gpxs.push([gpx.id, gpx.name, gpx.description]) + end + else + Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx| + gpxs.push([gpx.id, gpx.name, gpx.description]) + end + end + [0,'',gpxs] + end end # Get a relation with all tags and members. # Returns: - # 0. relation id, - # 1. hash of tags, - # 2. list of members. + # 0. success code? + # 1. object type? + # 2. relation id, + # 3. hash of tags, + # 4. list of members, + # 5. version. def getrelation(relid) #:doc: - rel = Relation.find(relid) - [relid,rel.tags,rel.members] + amf_handle_error("'getrelation' #{relid}") do + rel = Relation.find(:first, :conditions => { :id => relid }) + + return [-4, 'relation', relid, {}, [], nil] if rel.nil? or !rel.visible + [0, '', relid, rel.tags, rel.members, rel.version] + end + end + + # Find relations with specified name/id. + # Returns array of relations, each in same form as getrelation. + + def findrelations(searchterm) + rels = [] + if searchterm.to_i>0 then + rel = Relation.find(searchterm.to_i) + if rel and rel.visible then + rels.push([rel.id, rel.tags, rel.members, rel.version]) + end + else + RelationTag.find(:all, :limit => 11, :conditions => ["v like ?", "%#{searchterm}%"] ).each do |t| + if t.relation.visible then + rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version]) + end + end + end + rels end # Save a relation. # Returns # 0. 0 (success), # 1. original relation id (unchanged), - # 2. new relation id. - - def putrelation(renumberednodes, renumberedways, usertoken,relid,tags,members,visible) #:doc: - uid=getuserid(usertoken) - if !uid then return -1,"You are not logged in, so the point could not be saved." end - - relid = relid.to_i - visible = visible.to_i - - # create a new relation, or find the existing one - if relid <= 0 - rel = Relation.new - else - rel = Relation.find(relid) - end - - # check the members are all positive, and correctly type - typedmembers = [] - members.each do |m| - mid = m[1].to_i - if mid < 0 - mid = renumberednodes[mid] if m[0] == 'node' - mid = renumberedways[mid] if m[0] == 'way' - if mid < 0 - return -2, "Negative ID unresolved" - end - end - typedmembers << [m[0], mid, m[2]] - end - - # assign new contents - rel.members = typedmembers - rel.tags = tags - rel.visible = visible - rel.user_id = uid - - # check it then save it - # BUG: the following is commented out because it always fails on my - # install. I think it's a Rails bug. - - #if !rel.preconditions_ok? - # return -2, "Relation preconditions failed" - #else - rel.save_with_history! - #end - - [0,relid,rel.id] + # 2. new relation id, + # 3. version. + + def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc: + amf_handle_error("'putrelation' #{relid}") do + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the relation could not be saved." end + if !tags_ok(tags) then return -1,"One of the tags is invalid. Please pester Adobe to fix Flash on Linux." end + tags = strip_non_xml_chars tags + + relid = relid.to_i + visible = (visible.to_i != 0) + + new_relation = nil + relation = nil + Relation.transaction do + # create a new relation, or find the existing one + if relid > 0 + relation = Relation.find(relid) + end + # We always need a new node, based on the data that has been sent to us + new_relation = Relation.new + + # check the members are all positive, and correctly type + typedmembers = [] + members.each do |m| + mid = m[1].to_i + if mid < 0 + mid = renumberednodes[mid] if m[0] == 'Node' + mid = renumberedways[mid] if m[0] == 'Way' + end + if mid + typedmembers << [m[0], mid, m[2]] + end + end + + # assign new contents + new_relation.members = typedmembers + new_relation.tags = tags + new_relation.visible = visible + new_relation.changeset_id = changeset_id + new_relation.version = version + + if relid <= 0 + # We're creating the relation + new_relation.create_with_history(user) + elsif visible + # We're updating the relation + new_relation.id = relid + relation.update_from(new_relation, user) + else + # We're deleting the relation + new_relation.id = relid + relation.delete_with_history!(new_relation, user) + end + end # transaction + + if relid <= 0 + return [0, '', relid, new_relation.id, new_relation.version] + else + return [0, '', relid, relid, relation.version] + end + end end # Save a way to the database, including all nodes. Any nodes in the previous # version and no longer used are deleted. # + # Parameters: + # 0. hash of renumbered nodes (added by amf_controller) + # 1. current user token (for authentication) + # 2. current changeset + # 3. new way version + # 4. way ID + # 5. list of nodes in way + # 6. hash of way tags + # 7. array of nodes to change (each one is [lon,lat,id,version,tags]), + # 8. hash of nodes to delete (id->version). + # # Returns: # 0. '0' (code for success), - # 1. original way id (unchanged), - # 2. new way id, - # 3. hash of renumbered nodes (old id=>new id) - - def putway(renumberednodes,usertoken,originalway,points,attributes) #:doc: - - # -- Initialise and carry out checks - - uid=getuserid(usertoken) - if !uid then return -1,"You are not logged in, so the way could not be saved." end - originalway=originalway.to_i - - points.each do |a| - if a[2]==0 or a[2].nil? then return -2,"Server error - node with id 0 found in way #{originalway}." end - if a[1]==90 then return -2,"Server error - node with lat -90 found in way #{originalway}." end - end - - if points.length<2 then return -2,"Server error - way is only #{points.length} points long." end - - # -- Get unique nodes - - if originalway<0 - way=Way.new - uniques=[] - else - way=Way.find(originalway) - uniques=way.unique_nodes - end - - # -- Compare nodes and save changes to any that have changed - - nodes=[] - - points.each do |n| - lon=n[0].to_f - lat=n[1].to_f - id =n[2].to_i - savenode=false - if renumberednodes[id] - id=renumberednodes[id] - elsif id<0 - # Create new node - node=Node.new - savenode=true - else - node=Node.find(id) - if (!fpcomp(lat,node.lat) or !fpcomp(lon,node.lon) or \ - Tags.join(n[4])!=node.tags or node.visible==0) - savenode=true - end - end - if savenode - node.user_id=uid - node.lat=lat; node.lon=lon - node.tags=Tags.join(n[4]) - node.visible=true - node.save_with_history! - if id!=node.id - renumberednodes[id]=node.id - id=node.id - end - end - uniques=uniques-[id] - nodes.push(id) - end - - # -- Delete any unique nodes + # 1. message, + # 2. original way id (unchanged), + # 3. new way id, + # 4. hash of renumbered nodes (old id=>new id), + # 5. way version, + # 6. hash of node versions (node=>version) + + def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc: + amf_handle_error("'putway' #{originalway}") do + # -- Initialise - uniques.each do |n| - deleteitemrelations(n,'node') - node=Node.find(n) - node.user_id=uid - node.visible=false - node.save_with_history! - end - - # -- Save revised way - - way.tags=attributes - way.nds=nodes - way.user_id=uid - way.visible=true - way.save_with_history! - - [0,originalway,way.id,renumberednodes] + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the way could not be saved." end + if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end + if !tags_ok(tags) then return -1,"One of the tags is invalid. Please pester Adobe to fix Flash on Linux." end + tags = strip_non_xml_chars tags + + originalway = originalway.to_i + pointlist.collect! {|a| a.to_i } + + way=nil # this is returned, so scope it outside the transaction + nodeversions = {} + Way.transaction do + + # -- Update each changed node + + nodes.each do |a| + lon = a[0].to_f + lat = a[1].to_f + id = a[2].to_i + version = a[3].to_i + if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end + if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end + if renumberednodes[id] then id = renumberednodes[id] end + + node = Node.new + node.changeset_id = changeset_id + node.lat = lat + node.lon = lon + node.tags = a[4] + node.tags.delete('created_by') + node.version = version + if id <= 0 + # We're creating the node + node.create_with_history(user) + renumberednodes[id] = node.id + nodeversions[node.id] = node.version + else + # We're updating an existing node + previous=Node.find(id) + node.id=id + previous.update_from(node, user) + nodeversions[previous.id] = previous.version + end + end + + # -- Save revised way + + pointlist.collect! {|a| + renumberednodes[a] ? renumberednodes[a]:a + } # renumber nodes + new_way = Way.new + new_way.tags = attributes + new_way.nds = pointlist + new_way.changeset_id = changeset_id + new_way.version = wayversion + if originalway <= 0 + new_way.create_with_history(user) + way=new_way # so we can get way.id and way.version + else + way = Way.find(originalway) + if way.tags!=attributes or way.nds!=pointlist or !way.visible? + new_way.id=originalway + way.update_from(new_way, user) + end + end + + # -- Delete unwanted nodes + + deletednodes.each do |id,v| + node = Node.find(id.to_i) + new_node = Node.new + new_node.changeset_id = changeset_id + new_node.version = v.to_i + new_node.id = id.to_i + begin + node.delete_with_history!(new_node, user) + rescue OSM::APIPreconditionFailedError => ex + # We don't do anything here as the node is being used elsewhere + # and we don't want to delete it + end + end + + end # transaction + + [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes] + end end # Save POI to the database. # Refuses save if the node has since become part of a way. - # Returns: + # Returns array with: # 0. 0 (success), - # 1. original node id (unchanged), - # 2. new node id. - - def putpoi(usertoken,id,lon,lat,tags,visible) #:doc: - uid=getuserid(usertoken) - if !uid then return -1,"You are not logged in, so the point could not be saved." end - - id=id.to_i - visible=(visible.to_i==1) - - if (id>0) then - node=Node.find(id) - if !visible then - unless node.ways.empty? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end - deleteitemrelations(id,'node') - end - else - node=Node.new - end - - node.user_id = uid - node.latitude = (lat*10000000).round - node.longitude = (lon*10000000).round - node.tags = Tags.join(tags) - node.visible=visible - node.save_with_history! - newid=node.id - [0,id,newid] + # 1. success message, + # 2. original node id (unchanged), + # 3. new node id, + # 4. version. + + def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc: + amf_handle_error("'putpoi' #{id}") do + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the point could not be saved." end + if !tags_ok(tags) then return -1,"One of the tags is invalid. Please pester Adobe to fix Flash on Linux." end + tags = strip_non_xml_chars tags + + id = id.to_i + visible = (visible.to_i == 1) + node = nil + new_node = nil + Node.transaction do + if id > 0 then + node = Node.find(id) + + if !visible then + unless node.ways.empty? then return -1,"The point has since become part of a way, so you cannot save it as a POI.",id,id,version end + end + end + # We always need a new node, based on the data that has been sent to us + new_node = Node.new + + new_node.changeset_id = changeset_id + new_node.version = version + new_node.lat = lat + new_node.lon = lon + new_node.tags = tags + if id <= 0 + # We're creating the node + new_node.create_with_history(user) + elsif visible + # We're updating the node + new_node.id=id + node.update_from(new_node, user) + else + # We're deleting the node + new_node.id=id + node.delete_with_history!(new_node, user) + end + + end # transaction + + if id <= 0 + return [0, '', id, new_node.id, new_node.version] + else + return [0, '', id, node.id, node.version] + end + end end # Read POI from database # (only called on revert: POIs are usually read by whichways). # - # Returns array of id, long, lat, hash of tags. - - def getpoi(id) #:doc: - n = Node.find(id) - if n - return [n.id, n.lon, n.lat, n.tags_as_hash] - else - return [nil,nil,nil,''] - end + # Returns array of id, long, lat, hash of tags, (current) version. + + def getpoi(id,timestamp) #:doc: + amf_handle_error("'getpoi' #{id}") do + id = id.to_i + n = Node.find(id) + v = n.version + unless timestamp == '' + n = OldNode.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC') + end + + if n + return [0, '', n.id, n.lon, n.lat, n.tags, v] + else + return [-4, 'node', id, nil, nil, {}, nil] + end + end end - # Delete way and all constituent nodes. Also removes from any relations. - # Returns 0 (success), unchanged way id. - - def deleteway(usertoken,way_id) #:doc: - uid=getuserid(usertoken) - if !uid then return -1,"You are not logged in, so the way could not be deleted." end - - # FIXME: would be good not to make two history entries when removing - # two nodes from the same relation - user = User.find(uid) - way = Way.find(way_id) - way.unique_nodes.each do |n| - deleteitemrelations(n,'node') - end - - way.delete_with_relations_and_nodes_and_history(user) - return [0,way_id] + # Delete way and all constituent nodes. + # Params: + # * The user token + # * the changeset id + # * the id of the way to change + # * the version of the way that was downloaded + # * a hash of the id and versions of all the nodes that are in the way, if any + # of the nodes have been changed by someone else then, there is a problem! + # Returns 0 (success), unchanged way id, new way version, new node versions. + + def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc: + amf_handle_error("'deleteway' #{way_id}") do + user = getuser(usertoken) + unless user then return -1,"You are not logged in, so the way could not be deleted." end + + way_id = way_id.to_i + nodeversions = {} + old_way=nil # returned, so scope it outside the transaction + # Need a transaction so that if one item fails to delete, the whole delete fails. + Way.transaction do + + # -- Delete the way + + old_way = Way.find(way_id) + delete_way = Way.new + delete_way.version = way_version + delete_way.changeset_id = changeset_id + delete_way.id = way_id + old_way.delete_with_history!(delete_way, user) + + # -- Delete unwanted nodes + + deletednodes.each do |id,v| + node = Node.find(id.to_i) + new_node = Node.new + new_node.changeset_id = changeset_id + new_node.version = v.to_i + new_node.id = id.to_i + begin + node.delete_with_history!(new_node, user) + nodeversions[node.id]=node.version + rescue OSM::APIPreconditionFailedError => ex + # We don't do anything with the exception as the node is in use + # elsewhere and we don't want to delete it + end + end + + end # transaction + [0, '', way_id, old_way.version, nodeversions] + end end # ==================================================================== # Support functions - # Remove a node or way from all relations - - def deleteitemrelations(objid,type) #:doc: - relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', type, objid]).collect { |ws| ws.id }.uniq - relationids.each do |relid| - rel=Relation.find(relid) - rel.members.delete_if {|x| x[0]==type and x[1]==objid} - rel.save_with_history! - end + # Authenticate token + # (can also be of form user:pass) + # When we are writing to the api, we need the actual user model, + # not just the id, hence this abstraction + + def getuser(token) #:doc: + if (token =~ /^(.+)\:(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end + return user end - # Break out node tags into a hash - # (should become obsolete as of API 0.6) - - def tagstring_to_hash(a) #:doc: - tags={} - Tags.split(a) do |k, v| - tags[k]=v - end - tags + # Send AMF response + + def sendresponse(results) + a,b=results.length.divmod(256) + render :content_type => "application/x-amf", :text => proc { |response, output| + # ** move amf writing loop into here - + # basically we read the messages in first (into an array of some sort), + # then iterate through that array within here, and do all the AMF writing + output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr + results.each do |k,v| + output.write(v) + end + } end - # Authenticate token - # (could be removed if no-one uses the username+password form) - - def getuserid(token) #:doc: - if (token =~ /^(.+)\+(.+)$/) then - user = User.authenticate(:username => $1, :password => $2) - else - user = User.authenticate(:token => token) - end - - return user ? user.id : nil; + def getlocales + Dir.glob("#{RAILS_ROOT}/config/potlatch/localised/*").collect { |f| File.basename(f) } end - - # Compare two floating-point numbers to within 0.0000001 - - def fpcomp(a,b) #:doc: - return ((a/0.0000001).round==(b/0.0000001).round) + + ## + # check that all key-value pairs are valid UTF-8. + def tags_ok(tags) + tags.each do |k, v| + return false unless UTF8.valid? k + return false unless UTF8.valid? v + end + return true end + ## + # strip characters which are invalid in XML documents from the strings + # in the +tags+ hash. + def strip_non_xml_chars(tags) + new_tags = Hash.new + unless tags.nil? + tags.each do |k, v| + new_k = k.delete "\000-\037", "^\011\012\015" + new_v = v.delete "\000-\037", "^\011\012\015" + new_tags[new_k] = new_v + end + end + return new_tags + end # ==================================================================== # Alternative SQL queries for getway/whichways - def sql_find_way_ids_in_area(xmin,ymin,xmax,ymax) - sql=<<-EOF - SELECT DISTINCT current_way_nodes.id AS wayid - FROM current_way_nodes - INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id - INNER JOIN current_ways ON current_ways.id =current_way_nodes.id - WHERE current_nodes.visible=1 - AND current_ways.visible=1 - AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} - EOF - return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['wayid'].to_i } + def sql_find_ways_in_area(xmin,ymin,xmax,ymax) + sql=<<-EOF + SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version + FROM current_way_nodes + INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id + INNER JOIN current_ways ON current_ways.id =current_way_nodes.id + WHERE current_nodes.visible=TRUE + AND current_ways.visible=TRUE + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + EOF + return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] } end def sql_find_pois_in_area(xmin,ymin,xmax,ymax) - sql=<<-EOF - SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.tags + pois=[] + sql=<<-EOF + SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version FROM current_nodes - LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id - WHERE current_nodes.visible=1 + LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id + WHERE current_nodes.visible=TRUE AND cwn.id IS NULL AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} - EOF - return ActiveRecord::Base.connection.select_all(sql).collect { |n| [n['id'].to_i,n['lon'].to_f,n['lat'].to_f,tagstring_to_hash(n['tags'])] } + EOF + ActiveRecord::Base.connection.select_all(sql).each do |row| + poitags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n| + poitags[n['k']]=n['v'] + end + pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i] + end + pois end def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids) - # ** It would be more Potlatchy to get relations for nodes within ways - # during 'getway', not here - sql=<<-EOF - SELECT DISTINCT cr.id AS relid - FROM current_relations cr - INNER JOIN current_relation_members crm ON crm.id=cr.id - INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node' - WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")} - EOF - unless way_ids.empty? - sql+=<<-EOF - UNION - SELECT DISTINCT cr.id AS relid - FROM current_relations cr - INNER JOIN current_relation_members crm ON crm.id=cr.id - WHERE crm.member_type='way' - AND crm.member_id IN (#{way_ids.join(',')}) - EOF - end - return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['relid'].to_i }.uniq + # ** It would be more Potlatchy to get relations for nodes within ways + # during 'getway', not here + sql=<<-EOF + SELECT DISTINCT cr.id AS relid,cr.version AS version + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='Node' + WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")} + EOF + unless way_ids.empty? + sql+=<<-EOF + UNION + SELECT DISTINCT cr.id AS relid,cr.version AS version + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + WHERE crm.member_type='Way' + AND crm.member_id IN (#{way_ids.join(',')}) + EOF + end + ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] } end def sql_get_nodes_in_way(wayid) - points=[] - sql=<<-EOF - SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,tags - FROM current_way_nodes,current_nodes - WHERE current_way_nodes.id=#{wayid.to_i} + points=[] + sql=<<-EOF + SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version + FROM current_way_nodes,current_nodes + WHERE current_way_nodes.id=#{wayid.to_i} AND current_way_nodes.node_id=current_nodes.id - AND current_nodes.visible=1 - ORDER BY sequence_id + AND current_nodes.visible=TRUE + ORDER BY sequence_id EOF - ActiveRecord::Base.connection.select_all(sql).each do |row| - points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nil,tagstring_to_hash(row['tags'])] - end - points + ActiveRecord::Base.connection.select_all(sql).each do |row| + nodetags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n| + nodetags[n['k']]=n['v'] + end + nodetags.delete('created_by') + points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags,row['version'].to_i] + end + points end def sql_get_tags_in_way(wayid) - tags={} - ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row| - tags[row['k']]=row['v'] - end - tags + tags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row| + tags[row['k']]=row['v'] + end + tags end + def sql_get_way_version(wayid) + ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")['version'] + end + + def sql_get_way_user(wayid) + ActiveRecord::Base.connection.select_one("SELECT user FROM current_ways,changesets WHERE current_ways.id=#{wayid.to_i} AND current_ways.changeset=changesets.id")['user'] + end end +