X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/9ff99966676e65533f8f90a278f678769a6f8b45..37df03a0432c0fcbc1c1b91af741a5cc135bea34:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index e11d7e4e5..aee31295c 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,975 +1,943 @@ +# amf_controller is a semi-standalone API for Flash clients, particularly +# Potlatch. All interaction between Potlatch (as a .SWF application) and the +# OSM database takes place using this controller. Messages are +# encoded in the Actionscript Message Format (AMF). +# +# Helper functions are in /lib/potlatch.rb +# +# Author:: editions Systeme D / Richard Fairhurst 2004-2008 +# Licence:: public domain. +# +# == General structure +# +# 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(-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 logger.info("message"). + +# Remaining issues: +# * version conflict when POIs and ways are reverted + class AmfController < ApplicationController require 'stringio' - session :off - before_filter :check_availability - - # to log: - # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") - - # ==================================================================== - # Main AMF handler + include Potlatch - # ---- talk process AMF request + # Help methods for checking boundary sanity and area size + include MapBoundary - def talk - req=StringIO.new(request.raw_post) # Get POST data as request - req.read(2) # Skip version indicator and client ID - results={} # Results of each body + before_filter :check_api_writable - # ------------- - # Parse request - - headers=getint(req) # Read number of headers - - headers.times do # Read each header - name=getstring(req) # | - req.getc # | skip boolean - value=getvalue(req) # | - header["name"]=value # | - end + # 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 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=getint(req) # Read number of bodies - bodies.times do # Read each body - message=getstring(req) # | get message name - index=getstring(req) # | get index in response sequence - bytes=getlong(req) # | get total size in bytes - args=getvalue(req) # | get response (probably an array) - - case message - when 'getpresets'; results[index]=putdata(index,getpresets) - when 'whichways'; results[index]=putdata(index,whichways(args)) - when 'getway'; results[index]=putdata(index,getway(args)) - when 'putway'; results[index]=putdata(index,putway(args)) - when 'deleteway'; results[index]=putdata(index,deleteway(args)) - when 'makeway'; results[index]=putdata(index,makeway(args)) - when 'putpoi'; results[index]=putdata(index,putpoi(args)) - when 'getpoi'; results[index]=putdata(index,getpoi(args)) + 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[0])) + 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 - - # ------------------ - # Write out response - - RAILS_DEFAULT_LOGGER.info(" Response: start") - 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 - } - RAILS_DEFAULT_LOGGER.info(" Response: end") - end - private + 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 - # ==================================================================== - # Remote calls - - # ----- getpresets - # return presets,presetmenus and presetnames arrays - - def getpresets - presets={} - presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]; presetmenus['POI']=[] - presetnames={}; presetnames['point']={}; presetnames['way']={}; presetnames['POI']={} - presettype='' - presetcategory='' - - RAILS_DEFAULT_LOGGER.info(" Message: getpresets") - - # File.open("config/potlatch/presets.txt") do |file| - - # Temporary patch to get around filepath problem - # To remove this patch and make the code nice again: - # 1. uncomment above line - # 2. fix the path in the above line - # 3. delete this here document, and the following line (StringIO....) - - txt=<<-EOF -way/road -motorway: highway=motorway,ref=(type road number) -trunk road: highway=trunk,ref=(type road number),name=(type road name) -primary road: highway=primary,ref=(type road number),name=(type road name) -secondary road: highway=secondary,ref=(type road number),name=(type road name) -residential road: highway=residential,name=(type road name) -unclassified road: highway=unclassified,name=(type road name) - -way/footway -footpath: highway=footway,foot=yes -bridleway: highway=bridleway,foot=yes -byway: highway=unsurfaced,foot=yes -permissive path: highway=footway,foot=permissive - -way/cycleway -cycle lane: highway=cycleway,cycleway=lane,ncn_ref= -cycle track: highway=cycleway,cycleway=track,ncn_ref= -cycle lane (NCN): highway=cycleway,cycleway=lane,name=(type name here),ncn_ref=(type route number) -cycle track (NCN): highway=cycleway,cycleway=track,name=(type name here),ncn_ref=(type route number) - -way/waterway -canal: waterway=canal,name=(type name here) -navigable river: waterway=river,boat=yes,name=(type name here) -navigable drain: waterway=drain,boat=yes,name=(type name here) -derelict canal: waterway=derelict_canal,name=(type name here) -unnavigable river: waterway=river,boat=no,name=(type name here) -unnavigable drain: waterway=drain,boat=no,name=(type name here) - -way/railway -railway: railway=rail -tramway: railway=tram -light railway: railway=light_rail -preserved railway: railway=preserved -disused railway tracks: railway=disused -course of old railway: railway=abandoned - -way/natural -lake: landuse=water -forest: landuse=forest - -point/road -mini roundabout: highway=mini_roundabout -traffic lights: highway=traffic_signals - -point/footway -bridge: highway=bridge -gate: highway=gate -stile: highway=stile -cattle grid: highway=cattle_grid - -point/cycleway -gate: highway=gate - -point/waterway -lock gate: waterway=lock_gate -weir: waterway=weir -aqueduct: waterway=aqueduct -winding hole: waterway=turning_point -mooring: waterway=mooring - -point/railway -station: railway=station -viaduct: railway=viaduct -level crossing: railway=crossing - -point/natural -peak: point=peak - -POI/road -car park: amenity=parking -petrol station: amenity=fuel - -POI/place -city: place=city,name=(type name here),is_in=(type region or county) -town: place=town,name=(type name here),is_in=(type region or county) -suburb: place=suburb,name=(type name here),is_in=(type region or county) -village: place=village,name=(type name here),is_in=(type region or county) -hamlet: place=hamlet,name=(type name here),is_in=(type region or county) - -POI/tourism -attraction: tourism=attraction,amenity=,religion=,denomination= -church: tourism=,amenity=place_of_worship,name=(type name here),religion=Christian,denomination=(type denomination here) -hotel: tourism=hotel,amenity=,religion=,denomination= -other religious: tourism=,amenity=place_of_worship,name=(type name here),religion=(type religion),denomation= -pub: tourism=,amenity=pub,name=(type name here),religion=,denomination= - -POI/natural -peak: point=peak -EOF - - StringIO.open(txt) do |file| - file.each_line {|line| - t=line.chomp - if (t=~/(\w+)\/(\w+)/) then - presettype=$1 - presetcategory=$2 - presetmenus[presettype].push(presetcategory) - presetnames[presettype][presetcategory]=["(no preset)"] - elsif (t=~/^(.+):\s?(.+)$/) then - pre=$1; kv=$2 - presetnames[presettype][presetcategory].push(pre) - presets[pre]={} - kv.split(',').each {|a| - if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 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 - return [presets,presetmenus,presetnames] end - # ----- whichways(left,bottom,right,top) - # return array of ways in current bounding box - # at present, instead of using correct (=more complex) SQL to find - # corner-crossing ways, it simply enlarges the bounding box by +/- 0.01 - - def whichways(args) - xmin = args[0].to_f-0.01 - ymin = args[1].to_f-0.01 - xmax = args[2].to_f+0.01 - ymax = args[3].to_f+0.01 - baselong = args[4] - basey = args[5] - masterscale = args[6] - - RAILS_DEFAULT_LOGGER.info(" Message: whichways, bbox=#{xmin},#{ymin},#{xmax},#{ymax}") - - waylist=WaySegment.find_by_sql("SELECT DISTINCT current_way_segments.id AS wayid"+ - " FROM current_way_segments,current_segments,current_nodes,current_ways "+ - " WHERE segment_id=current_segments.id "+ - " AND current_segments.visible=1 "+ - " AND node_a=current_nodes.id "+ - " AND current_ways.id=current_way_segments.id "+ - " AND current_ways.visible=1 "+ - " AND (latitude BETWEEN "+ymin.to_s+" AND "+ymax.to_s+") "+ - " AND (longitude BETWEEN "+xmin.to_s+" AND "+xmax.to_s+")") - - ways = waylist.collect {|a| a.wayid.to_i } # get an array of way id's - - pointlist =ActiveRecord::Base.connection.select_all("SELECT current_nodes.id,latitude,longitude,current_nodes.tags "+ - " FROM current_nodes "+ - " LEFT OUTER JOIN current_segments cs1 ON cs1.node_a=current_nodes.id "+ - " LEFT OUTER JOIN current_segments cs2 ON cs2.node_b=current_nodes.id "+ - " WHERE (latitude BETWEEN "+ymin.to_s+" AND "+ymax.to_s+") "+ - " AND (longitude BETWEEN "+xmin.to_s+" AND "+xmax.to_s+") "+ - " AND cs1.id IS NULL AND cs2.id IS NULL "+ - " AND current_nodes.visible=1") - - points = pointlist.collect {|a| [a['id'],long2coord(a['longitude'].to_f,baselong,masterscale),lat2coord(a['latitude'].to_f,basey,masterscale),tag2array(a['tags'])] } # get a list of node ids and their tags - - return [ways,points] - end - - # ----- getway (objectname, way, baselong, basey, masterscale) - # returns objectname, array of co-ordinates, attributes, - # xmin,xmax,ymin,ymax - - def getway(args) - objname,wayid,baselong,basey,masterscale=args - wayid = wayid.to_i - points = [] - lastid = -1 - xmin = ymin = 999999 - xmax = ymax = -999999 - - RAILS_DEFAULT_LOGGER.info(" Message: getway, id=#{wayid}") - - readwayquery(wayid).each {|row| - xs1=long2coord(row['long1'].to_f,baselong,masterscale); ys1=lat2coord(row['lat1'].to_f,basey,masterscale) - xs2=long2coord(row['long2'].to_f,baselong,masterscale); ys2=lat2coord(row['lat2'].to_f,basey,masterscale) - points << [xs1,ys1,row['id1'].to_i,0,tag2array(row['tags1']),0] if (row['id1'].to_i!=lastid) - lastid = row['id2'].to_i - points << [xs2,ys2,row['id2'].to_i,1,tag2array(row['tags2']),row['segment_id'].to_i] - xmin = [xmin,row['long1'].to_f,row['long2'].to_f].min - xmax = [xmax,row['long1'].to_f,row['long2'].to_f].max - ymin = [ymin,row['lat1'].to_f,row['lat2'].to_f].min - ymax = [ymax,row['lat1'].to_f,row['lat2'].to_f].max - } - - attributes={} - attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM current_way_tags WHERE id=#{wayid}" - attrlist.each {|a| attributes[a['k']]=a['v'] } + private - [objname,points,attributes,xmin,xmax,ymin,ymax] + 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 - # ----- putway (user token, way, array of co-ordinates, array of attributes, - # baselong, basey, masterscale) - # returns current way ID, new way ID, hash of renumbered nodes, - # xmin,xmax,ymin,ymax - - def putway(args) - usertoken,originalway,points,attributes,baselong,basey,masterscale=args - uid=getuserid(usertoken) - return if !uid - db_uqs='uniq'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquesegments table name, typically 51 chars - db_uqn='unin'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars - db_now='@now'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars - ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") - originalway=originalway.to_i - - RAILS_DEFAULT_LOGGER.info(" Message: putway, id=#{originalway}") - - # -- 3. read original way into memory - - xc={}; yc={}; tagc={}; seg={} - if originalway>0 - way=originalway - readwayquery(way).each { |row| - id1=row['id1'].to_i; xc[id1]=row['long1'].to_f; yc[id1]=row['lat1'].to_f; tagc[id1]=row['tags1'] - id2=row['id2'].to_i; xc[id2]=row['long2'].to_f; yc[id2]=row['lat2'].to_f; tagc[id2]=row['tags2'] - seg[row['segment_id'].to_i]=id1.to_s+'-'+id2.to_s - } - ActiveRecord::Base.connection.update("UPDATE current_ways SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id=#{way}") - else - way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)") + 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 - # -- 4. get version by inserting new row into ways - - version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)") - - # -- 5. compare nodes and update xmin,xmax,ymin,ymax - - xmin = ymin = 999999 - xmax = ymax = -999999 - insertsql = '' - renumberednodes={} - - points.each_index do |i| - xs=coord2long(points[i][0],masterscale,baselong) - ys=coord2lat(points[i][1],masterscale,basey) - xmin=[xs,xmin].min; xmax=[xs,xmax].max - ymin=[ys,ymin].min; ymax=[ys,ymax].max - node=points[i][2].to_i - tagstr=array2tag(points[i][4]) - tagstr=tagstr.gsub(/[\000-\037]/,"") - tagsql="'"+sqlescape(tagstr)+"'" - - # compare node - if node<0 - # new node - create - if renumberednodes[node.to_s].nil? - newnode=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes ( latitude,longitude,timestamp,user_id,visible,tags) VALUES ( #{ys},#{xs},#{db_now},#{uid},1,#{tagsql})") - ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{newnode},#{ys},#{xs},#{db_now},#{uid},1,#{tagsql})") - points[i][2]=newnode - renumberednodes[node.to_s]=newnode.to_s - else - points[i][2]=renumberednodes[node.to_s].to_i - end - - elsif xc.has_key?(node) - # old node from original way - update - if (xs!=xc[node] or (ys/0.0000001).round!=(yc[node]/0.0000001).round or tagstr!=tagc[node]) - ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{node},#{ys},#{xs},#{db_now},#{uid},1,#{tagsql})") - ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{ys},longitude=#{xs},timestamp=#{db_now},user_id=#{uid},tags=#{tagsql},visible=1 WHERE id=#{node}") + # 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 - # old node, created in another way and now added to this way + return [0,'',nil] end - end + end + # Return presets (default tags, localisation etc.): + # uses POTLATCH_PRESETS global, set up in OSM::Potlatch. - # -- 6.i compare segments - - numberedsegments={} - seglist='' # list of existing segments that we want to keep - for i in (0..(points.length-2)) - if (points[i+1][3].to_i==0) then next end - segid=points[i+1][5].to_i - from =points[i ][2].to_i - to =points[i+1][2].to_i - if seg.has_key?(segid) - # if segment exists, check it still refers to the same nodes - if seg[segid]=="#{from}-#{to}" then - if (seglist!='') then seglist+=',' end; seglist+=segid.to_s - next - end - elsif segid>0 - # not in previous version of way, but supplied, so assume - # that it's come from makeway (i.e. unwayed segments) - if (seglist!='') then seglist+=',' end; seglist+=segid.to_s - next - end - segid=ActiveRecord::Base.connection.insert("INSERT INTO current_segments ( node_a,node_b,timestamp,user_id,visible,tags) VALUES ( #{from},#{to},#{db_now},#{uid},1,'')") - ActiveRecord::Base.connection.insert("INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible,tags) VALUES (#{segid},#{from},#{to},#{db_now},#{uid},1,'')") - points[i+1][5]=segid - numberedsegments[(i+1).to_s]=segid.to_s - end - + def getpresets(lang) #:doc: + lang.gsub!(/[^\w\-]/,'') - # -- 6.ii insert new way segments + begin + localised = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/localised.yaml")) + rescue + localised = "" # guess we'll just have to use the hardcoded English text instead + end - createuniquesegments(way,db_uqs,seglist) # segments which appear in this way but no other + 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 - # delete segments from uniquesegments (and not in modified way) + ## + # 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. + # + # 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 - sql=<<-EOF - INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible) - SELECT DISTINCT segment_id,node_a,node_b,#{db_now},#{uid},0 - FROM current_segments AS cs, #{db_uqs} AS us - WHERE cs.id=us.segment_id AND cs.visible=1 - EOF - ActiveRecord::Base.connection.insert(sql) + [0, '', ways, points, relations] + end + end - sql=<<-EOF - UPDATE current_segments AS cs, #{db_uqs} AS us - SET cs.timestamp=#{db_now},cs.visible=0,cs.user_id=#{uid} - WHERE cs.id=us.segment_id AND cs.visible=1 - EOF - ActiveRecord::Base.connection.update(sql) + # Find deleted ways in current bounding box (similar to whichways, but ways + # with a deleted node only - not POIs or relations). - # delete nodes not in modified way or any other segments + 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 - createuniquenodes(db_uqs,db_uqn) # nodes which appear in this way but no other + # check boundary is sane and area within defined + # see /config/application.yml + check_boundaries(xmin, ymin, xmax, ymax) - sql=<<-EOF - INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible) - SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0 - FROM current_nodes AS cn,#{db_uqn} - WHERE cn.id=node_id - EOF - ActiveRecord::Base.connection.insert(sql) + 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 - sql=<<-EOF - UPDATE current_nodes AS cn, #{db_uqn} - SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid} - WHERE cn.id=node_id - EOF - ActiveRecord::Base.connection.update(sql) - - ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqs}") - ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqn}") - - # insert new version of route into way_segments - - insertsql ='' - currentsql='' - sequence =1 - for i in (0..(points.length-2)) - if (points[i+1][3].to_i==0) then next end - if insertsql !='' then insertsql +=',' end - if currentsql!='' then currentsql+=',' end - insertsql +="(#{way},#{points[i+1][5]},#{version})" - currentsql+="(#{way},#{points[i+1][5]},#{sequence})" - sequence +=1 + [0,'',way_ids] end + end - ActiveRecord::Base.connection.execute("DELETE FROM current_way_segments WHERE id=#{way}"); - ActiveRecord::Base.connection.insert("INSERT INTO way_segments (id,segment_id,version ) VALUES #{insertsql}"); - ActiveRecord::Base.connection.insert("INSERT INTO current_way_segments (id,segment_id,sequence_id) VALUES #{currentsql}"); - - # -- 7. insert new way tags - - insertsql ='' - currentsql='' - attributes.each do |k,v| - if v=='' or v.nil? then next end - if v[0,6]=='(type ' then next end - if insertsql !='' then insertsql +=',' end - if currentsql!='' then currentsql+=',' end - k=k.gsub(/[\000-\037]/,"") - v=v.gsub(/[\000-\037]/,"") - insertsql +="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"',#{version})" - currentsql+="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"')" - end + # Get a way including nodes and tags. + # Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number. - ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}") - if (insertsql !='') then ActiveRecord::Base.connection.insert("INSERT INTO way_tags (id,k,v,version) VALUES #{insertsql}" ) end - if (currentsql!='') then ActiveRecord::Base.connection.insert("INSERT INTO current_way_tags (id,k,v) VALUES #{currentsql}") end + def getway(wayid) #:doc: + 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) + 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 + end - [originalway,way,renumberednodes,numberedsegments,xmin,xmax,ymin,ymax] + [0, '', wayid, points, tags, version] + 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 >= 0), uses the node in existence + # at the time, generating a new id if it's still visible and has been moved/ + # retagged. + # + # 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 - # ----- putpoi (user token, id, x,y,tag array,visible,baselong,basey,masterscale) - # returns current id, new id - # if new: add new row to current_nodes and nodes - # if old: add new row to nodes, update current_nodes - - def putpoi(args) - usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args - uid=getuserid(usertoken) - return if !uid - db_now='@now'+uid.to_s+id.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars - ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") - - id=id.to_i - visible=visible.to_i - x=coord2long(x.to_f,masterscale,baselong) - y=coord2lat(y.to_f,masterscale,basey) - tagsql="'"+sqlescape(array2tag(tags))+"'" - - if (id>0) then - ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{id},#{y},#{x},#{db_now},#{uid},#{visible},#{tagsql})"); - ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{y},longitude=#{x},timestamp=#{db_now},user_id=#{uid},visible=#{visible},tags=#{tagsql} WHERE id=#{id}"); - newid=id - else - newid=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes (latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{y},#{x},#{db_now},#{uid},#{visible},#{tagsql})"); - ActiveRecord::Base.connection.update("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{newid},#{y},#{x},#{db_now},#{uid},#{visible},#{tagsql})"); - end - [id,newid] + 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 - - # ----- getpoi (id,baselong,basey,masterscale) - # returns id,x,y,tag array - def getpoi(args) - id,baselong,basey,masterscale=args; id=id.to_i - poi=ActiveRecord::Base.connection.select_one("SELECT latitude,longitude,tags "+ - "FROM current_nodes WHERE visible=1 AND id=#{id}") - if poi.nil? then return [nil,nil,nil,''] end - [id, - long2coord(poi['longitude'].to_f,baselong,masterscale), - lat2coord(poi['latitude'].to_f,basey,masterscale), - tag2array(poi['tags'])] + # 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: + 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 -def makeway(args) - usertoken,x,y,baselong,basey,masterscale=args - uid=getuserid(usertoken) - return if !uid + # Get a relation with all tags and members. + # Returns: + # 0. success code? + # 1. object type? + # 2. relation id, + # 3. hash of tags, + # 4. list of members, + # 5. version. + + def getrelation(relid) #:doc: + amf_handle_error("'getrelation' #{relid}") do + rel = Relation.find(:first, :conditions => { :id => relid }) - points=[] - toreverse=[] # segments to reverse - nodesused={} # so we don't go over the same node twice + return [-4, 'relation', relid, {}, [], nil] if rel.nil? or !rel.visible + [0, '', relid, rel.tags, rel.members, rel.version] + end + end - # - find start point near x - - xc=coord2long(x,masterscale,baselong) - yc=coord2lat(y,masterscale,basey) + # 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 - RAILS_DEFAULT_LOGGER.info(" Message: makeway, xc=#{xc}, y=#{yc}") + # Save a relation. + # Returns + # 0. 0 (success), + # 1. original relation id (unchanged), + # 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 + + 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 - xs1=xc-0.001; xs2=xc+0.001 - ys1=yc-0.001; ys2=yc+0.001 - - sql=<<-EOF - SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,cn1.id AS id1, - cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid - FROM current_nodes AS cn1, - current_nodes AS cn2, - current_segments AS cs - LEFT OUTER JOIN current_way_segments ON segment_id=cs.id - WHERE (cn1.longitude BETWEEN #{xs1} AND #{xs2}) - AND (cn1.latitude BETWEEN #{ys1} AND #{ys2}) - AND segment_id IS NULL - AND cs.visible=1 - AND cn1.id=node_a AND cn1.visible=1 - AND cn2.id=node_b AND cn2.visible=1 - ORDER BY SQRT(POW(cn1.longitude-#{xc},2)+ - POW(cn1.latitude -#{yc},2)) - LIMIT 1 - EOF - row=ActiveRecord::Base.connection.select_one sql - if row.nil? then return [0,0,0,0,0] end - xs1=long2coord(row['lon1'].to_f,baselong,masterscale); ys1=lat2coord(row['lat1'].to_f,basey,masterscale) - xs2=long2coord(row['lon2'].to_f,baselong,masterscale); ys2=lat2coord(row['lat2'].to_f,basey,masterscale) - xmin=[xs1,xs2].min; xmax=[xs1,xs2].max - ymin=[ys1,ys2].min; ymax=[ys1,ys2].max - nodesused[row['id1'].to_i]=true - nodesused[row['id2'].to_i]=true - points<<[xs1,ys1,row['id1'].to_i,1,{},0] - points<<[xs2,ys2,row['id2'].to_i,1,{},row['segid'].to_i] - - # - extend at start, then end - while (a,point,nodesused,toreverse=findconnect(points[0][2],nodesused,'b',toreverse,baselong,basey,masterscale))[0] - points[0][5]=point[5]; point[5]=0 # segment leads to next node - points.unshift(point) - xmin=[point[0],xmin].min; xmax=[point[0],xmax].max - ymin=[point[1],ymin].min; ymax=[point[1],ymax].max - end - while (a,point,nodesused,toreverse=findconnect(points[-1][2],nodesused,'a',toreverse,baselong,basey,masterscale))[0] - points.push(point) - xmin=[point[0],xmin].min; xmax=[point[0],xmax].max - ymin=[point[1],ymin].min; ymax=[point[1],ymax].max - end - points[0][3]=0 # start with a move - - # reverse segments in toreverse - if toreverse.length>0 - sql=<<-EOF - UPDATE current_segments c1, current_segments c2 - SET c1.node_a=c2.node_b,c1.node_b=c2.node_a, - c1.timestamp=NOW(),c1.user_id=#{uid} - WHERE c1.id=c2.id - AND c1.id IN (#{toreverse.join(',')}) - EOF - ActiveRecord::Base.connection.update sql - sql=<<-EOF - INSERT INTO segments - (SELECT * FROM current_segments - WHERE id IN (#{toreverse.join(',')})) - EOF - ActiveRecord::Base.connection.insert sql - end - - [points,xmin,xmax,ymin,ymax] -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 -def findconnect(id,nodesused,lookfor,toreverse,baselong,basey,masterscale) - # get all segments with 'id' as a point - # (to look for both node_a and node_b, UNION is faster than node_a=id OR node_b=id)! - sql=<<-EOF - SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,cn1.id AS id1, - cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid - FROM current_nodes AS cn1, - current_nodes AS cn2, - current_segments AS cs - LEFT OUTER JOIN current_way_segments ON segment_id=cs.id - WHERE segment_id IS NULL - AND cs.visible=1 - AND cn1.id=node_a AND cn1.visible=1 - AND cn2.id=node_b AND cn2.visible=1 - AND node_a=#{id} - UNION - SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,cn1.id AS id1, - cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid - FROM current_nodes AS cn1, - current_nodes AS cn2, - current_segments AS cs - LEFT OUTER JOIN current_way_segments ON segment_id=cs.id - WHERE segment_id IS NULL - AND cs.visible=1 - AND cn1.id=node_a AND cn1.visible=1 - AND cn2.id=node_b AND cn2.visible=1 - AND node_b=#{id} - EOF - connectlist=ActiveRecord::Base.connection.select_all sql - - if lookfor=='b' then tocol='id1'; tolat='lat1'; tolon='lon1'; fromcol='id2'; fromlat='lat2'; fromlon='lon2' - else tocol='id2'; tolat='lat2'; tolon='lon2'; fromcol='id1'; fromlat='lat1'; fromlon='lon1' - 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. 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 - # eliminate those already in the hash - connex=0 - point=nil - connectlist.each { |row| - tonode=row[tocol].to_i - fromnode=row[fromcol].to_i - if id==tonode and !nodesused.has_key?(fromnode) - # wrong way round; add, then add to 'segments to reverse' list - connex+=1 - nodesused[fromnode]=true - point=[long2coord(row[fromlon].to_f,baselong,masterscale),lat2coord(row[fromlat].to_f,basey,masterscale),fromnode,1,{},row['segid'].to_i] - toreverse.push(row['segid'].to_i) - elsif id==fromnode and !nodesused.has_key?(tonode) - # right way round; just add - connex+=1 - point=[long2coord(row[tolon].to_f,baselong,masterscale),lat2coord(row[tolat].to_f,basey,masterscale),tonode,1,{},row['segid'].to_i] - nodesused[tonode]=true - end - } - - # if only one left, then add it; otherwise return false - if connex!=1 or point.nil? then - return [false,[],nodesused,toreverse] - else - return [true,point,nodesused,toreverse] - end -end + 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 + + 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 -# ==================================================================== -# Support functions for remote calls + # -- 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 -def readwayquery(id) - ActiveRecord::Base.connection.select_all "SELECT n1.latitude AS lat1,n1.longitude AS long1,n1.id AS id1,n1.tags as tags1, "+ - " n2.latitude AS lat2,n2.longitude AS long2,n2.id AS id2,n2.tags as tags2,segment_id "+ - " FROM current_way_segments,current_segments,current_nodes AS n1,current_nodes AS n2 "+ - " WHERE current_way_segments.id=#{id} "+ - " AND segment_id=current_segments.id "+ - " AND current_segments.visible=1 "+ - " AND n1.id=node_a and n2.id=node_b "+ - " AND n1.visible=1 AND n2.visible=1 "+ - " ORDER BY sequence_id" -end + end # transaction -def createuniquesegments(way,uqs_name,seglist) - # Finds segments which appear in (previous version of) this way and no other - sql=<<-EOF - CREATE TEMPORARY TABLE #{uqs_name} - SELECT a.segment_id - FROM (SELECT DISTINCT segment_id FROM current_way_segments - WHERE id = #{way}) a - LEFT JOIN current_way_segments b - ON b.segment_id = a.segment_id - AND b.id != #{way} - WHERE b.segment_id IS NULL - EOF - if (seglist!='') then sql+=" AND a.segment_id NOT IN (#{seglist})" end - ActiveRecord::Base.connection.execute(sql) -end + [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes] + end + end -def createuniquenodes(uqs_name,uqn_name) - # Finds nodes which appear in uniquesegments but no other segments - sql=<<-EOF - CREATE TEMPORARY TABLE #{uqn_name} - SELECT DISTINCT node_id - FROM (SELECT cn.id AS node_id - FROM current_nodes AS cn, - current_segments AS cs, - #{uqs_name} AS us - WHERE cs.id=us.segment_id - AND cn.id=cs.node_a) AS n - LEFT JOIN current_segments AS cs2 ON node_id=cs2.node_a AND cs2.visible=1 - LEFT JOIN current_segments AS cs3 ON node_id=cs3.node_b AND cs3.visible=1 - WHERE cs2.node_a IS NULL - AND cs3.node_b IS NULL - EOF - ActiveRecord::Base.connection.execute(sql) - sql=<<-EOF - INSERT INTO #{uqn_name} - SELECT DISTINCT node_id - FROM (SELECT cn.id AS node_id - FROM current_nodes AS cn, - current_segments AS cs, - #{uqs_name} AS us - WHERE cs.id=us.segment_id - AND cn.id=cs.node_b) AS n - LEFT JOIN current_segments AS cs2 ON node_id=cs2.node_a AND cs2.visible=1 - LEFT JOIN current_segments AS cs3 ON node_id=cs3.node_b AND cs3.visible=1 - WHERE cs2.node_a IS NULL - AND cs3.node_b IS NULL - EOF - ActiveRecord::Base.connection.execute(sql) -end + # Save POI to the database. + # Refuses save if the node has since become part of a way. + # Returns array with: + # 0. 0 (success), + # 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 + + 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 -def sqlescape(a) - a.gsub("'","''").gsub(92.chr,92.chr+92.chr) -end + end # transaction -def tag2array(a) - tags={} - a.gsub(';;;','#%').split(';').each do |b| - b.gsub!('#%',';;;') - b.gsub!('===','#%') - k,v=b.split('=') - if k.nil? then k='' end - if v.nil? then v='' end - tags[k.gsub('#%','=')]=v.gsub('#%','=') + if id <= 0 + return [0, '', id, new_node.id, new_node.version] + else + return [0, '', id, node.id, node.version] + end + end end - tags -end -def array2tag(a) - str='' - a.each do |k,v| - if v=='' then next end - if v[0,6]=='(type ' then next end - if str!='' then str+=';' end - str+=k.gsub(';',';;;').gsub('=','===')+'='+v.gsub(';',';;;').gsub('=','===') - end - str -end + # Read POI from database + # (only called on revert: POIs are usually read by whichways). + # + # Returns array of id, long, lat, hash of tags, (current) version. + + def getpoi(id,timestamp) #:doc: + amf_handle_error("'getpoi' #{id}") do + n = Node.find(id) + v = n.version + unless timestamp == '' + n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")]) + end -def getuserid(token) - if (token =~ /^(.+)\+(.+)$/) then - user = User.authenticate(:username => $1, :password => $2) - else - user = User.authenticate(:token => token) + if n + return [0, '', n.id, n.lon, n.lat, n.tags, v] + else + return [-4, 'node', id, nil, nil, {}, nil] + end + end end - return user ? user.id : nil; -end + # 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 -# ==================================================================== -# AMF read subroutines + # ==================================================================== + # Support functions -# ----- getint return two-byte integer -# ----- getlong return four-byte long -# ----- getstring return string with two-byte length -# ----- getdouble return eight-byte double-precision float -# ----- getobject return object/hash -# ----- getarray return numeric array + # 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 getint(s) - s.getc*256+s.getc -end + def getuser(token) #:doc: + if (token =~ /^(.+)\:(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end + return user + end -def getlong(s) - ((s.getc*256+s.getc)*256+s.getc)*256+s.getc -end + # 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 -def getstring(s) - len=s.getc*256+s.getc - s.read(len) -end -def getdouble(s) - a=s.read(8).unpack('G') # G big-endian, E little-endian - a[0] -end + # ==================================================================== + # Alternative SQL queries for getway/whichways -def getarray(s) - len=getlong(s) - arr=[] - for i in (0..len-1) - arr[i]=getvalue(s) + 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 - arr -end - -def getobject(s) - arr={} - while (key=getstring(s)) - if (key=='') then break end - arr[key]=getvalue(s) + + def sql_find_pois_in_area(xmin,ymin,xmax,ymax) + 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=TRUE + AND cwn.id IS NULL + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + 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 - s.getc # skip the 9 'end of object' value - arr -end - -# ----- getvalue parse and get value - -def getvalue(s) - case s.getc - when 0; return getdouble(s) # number - when 1; return s.getc # boolean - when 2; return getstring(s) # string - when 3; return getobject(s) # object/hash - when 5; return nil # null - when 6; return nil # undefined - when 8; s.read(4) # mixedArray - return getobject(s) # | - when 10; return getarray(s) # array - else; return nil # error + + 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,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 -end - -# ==================================================================== -# AMF write subroutines - -# ----- putdata envelope data into AMF writeable form -# ----- encodevalue pack variables as AMF - -def putdata(index,n) - d =encodestring(index+"/onResult") - d+=encodestring("null") - d+=[-1].pack("N") - d+=encodevalue(n) -end - -def encodevalue(n) - case n.class.to_s - when 'Array' - a=10.chr+encodelong(n.length) - n.each do |b| - a+=encodevalue(b) + + def sql_get_nodes_in_way(wayid) + 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=TRUE + ORDER BY sequence_id + EOF + 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 - a - when 'Hash' - a=3.chr - n.each do |k,v| - a+=encodestring(k)+encodevalue(v) + 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 - a+0.chr+0.chr+9.chr - when 'String' - 2.chr+encodestring(n) - when 'Bignum','Fixnum','Float' - 0.chr+encodedouble(n) - when 'NilClass' - 5.chr - else - RAILS_DEFAULT_LOGGER.error("Unexpected Ruby type for AMF conversion: "+n.class.to_s) + tags end -end - -# ----- encodestring encode string with two-byte length -# ----- encodedouble encode number as eight-byte double precision float -# ----- encodelong encode number as four-byte long - -def encodestring(n) - a,b=n.size.divmod(256) - a.chr+b.chr+n -end - -def encodedouble(n) - [n].pack('G') -end - -def encodelong(n) - [n].pack('N') -end -# ==================================================================== -# Co-ordinate conversion - -def lat2coord(a,basey,masterscale) - -(lat2y(a)-basey)*masterscale+250 -end - -def long2coord(a,baselong,masterscale) - (a-baselong)*masterscale+350 -end - -def lat2y(a) - 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) -end - -def coord2lat(a,masterscale,basey) - y2lat((a-250)/-masterscale+basey) -end - -def coord2long(a,masterscale,baselong) - (a-350)/masterscale+baselong -end - -def y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) + def sql_get_way_version(wayid) + ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}") + end end -end