# 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). # # See Also Potlatch::Potlatch and Potlatch::AMF # # Public domain. # editions Systeme D / Richard Fairhurst 2004-2008 # # All in/out parameters are floats unless explicitly stated. # # to trap errors (getway_old,putway,putpoi,deleteway only): # return(-1,"message") <-- just puts up a dialogue # return(-2,"message") <-- also asks the user to e-mail me # to log: # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") class AmfController < ApplicationController require 'stringio' include Potlatch session :off before_filter :check_write_availability # Main AMF handler. Tha talk method takes in AMF, figures out what to do and dispatched to the appropriate private method 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 # ------------- # 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)) when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args)) when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args)) when 'putway'; r=putway(args,renumberednodes) renumberednodes=r[3] results[index]=AMF.putdata(index,r) when 'deleteway'; results[index]=AMF.putdata(index,deleteway(args)) when 'putpoi'; results[index]=AMF.putdata(index,putpoi(args)) when 'getpoi'; results[index]=AMF.putdata(index,getpoi(args)) end 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 # Return presets (default tags and crap) to potlatch. # Uses POTLATCH_PRESETS global, set up in OSM::Potlatch def getpresets #:doc: return POTLATCH_PRESETS end # ----- whichways # Find all the way ids and nodes (including tags and projected lat/lng) which aren't part of those ways in an are # # The argument is an array containing the following, in order: # 0. minimum longitude # 1. minimum latitude # 2. maximum longitude # 3. maximum latitude # 4. baselong, 5. basey, 6. masterscale as above def whichways(args) #:doc: 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}") # 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_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash] } [way_ids,points] end # ----- whichways_deleted # return array of deleted ways in current bounding box # in: as whichways # does: finds all deleted ways with a deleted node in bounding box # out: [0] array of way ids def whichways_deleted(args) #:doc: 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] sql=<<-EOF SELECT DISTINCT current_ways.id FROM current_nodes,way_nodes,current_ways WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} AND way_nodes.node_id=current_nodes.id AND way_nodes.id=current_ways.id AND current_nodes.visible=0 AND current_ways.visible=0 EOF waylist = ActiveRecord::Base.connection.select_all(sql) ways = waylist.collect {|a| a['id'].to_i } [ways] end # ----- getway # Get a way with all of it's nodes and tags # The input is an array with the following components, in order: # 0. wayid - the ID of the way to get # 1. baselong - origin of SWF map (longitude) # 2. basey - origin of SWF map (latitude) # 3. masterscale - SWF map scale # # The output is an array which contains all the nodes (with projected # latitude and longitude) and tags for a way (and all the nodes tags). # It also has the way's unprojected (WGS84) bbox. # # FIXME: The server really shouldn't be figuring out a ways bounding box and doing projection for potlatch # FIXME: the argument splitting should be done in the 'talk' method, not here def getway(args) #:doc: wayid,baselong,basey,masterscale = args wayid = wayid.to_i RAILS_DEFAULT_LOGGER.info(" Message: getway, id=#{wayid}") # 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(wayid) long_array = [] lat_array = [] points = [] way.nodes.each do |node| projected_longitude = node.lon_potlatch(baselong,masterscale) # do projection for potlatch projected_latitude = node.lat_potlatch(basey,masterscale) id = node.id tags_hash = node.tags_as_hash points << [projected_longitude, projected_latitude, id, nil, tags_hash] long_array << projected_longitude lat_array << projected_latitude end [wayid,points,way.tags,long_array.min,long_array.max,lat_array.min,lat_array.max] end # ----- getway_old # returns old version of way # in: [0] way id, # [1] way version to get (or -1 for "last deleted version") # [2] baselong, [3] basey, [4] masterscale # does: gets old version of way and all constituent nodes # for undelete, always uses the most recent version of each node # (even if it's moved) # for revert, uses the historic version of each node, but if that node is # still visible and has been changed since, generates a new node id # out: [0] 0 (code for success), [1] SWF object name, # [2] array of points (as getway _except_ [3] is node.visible?, 0 or 1), # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox), # [8] way version def getway_old(args) #:doc: RAILS_DEFAULT_LOGGER.info(" Message: getway_old (server is #{SERVER_URL})") # if SERVER_URL=="www.openstreetmap.org" then return -1,"Revert is not currently enabled on the OpenStreetMap server." end wayid,version,baselong,basey,masterscale=args wayid = wayid.to_i version = version.to_i xmin = ymin = 999999 xmax = ymax = -999999 points=[] if version<0 historic=false version=getlastversion(wayid,version) else historic=true end readwayquery_old(wayid,version,historic).each { |row| points<<[long2coord(row['longitude'].to_f,baselong,masterscale),lat2coord(row['latitude'].to_f,basey,masterscale),row['id'].to_i,row['visible'].to_i,tag2array(row['tags'].to_s)] xmin=[xmin,row['longitude'].to_f].min xmax=[xmax,row['longitude'].to_f].max ymin=[ymin,row['latitude' ].to_f].min ymax=[ymax,row['latitude' ].to_f].max } # get tags from this version attributes={} attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM way_tags WHERE id=#{wayid} AND version=#{version}" attrlist.each {|a| attributes[a['k'].gsub(':','|')]=a['v'] } attributes['history']="Retrieved from v"+version.to_s [0,wayid,points,attributes,xmin,xmax,ymin,ymax,version] end # ----- getway_history # find history of a way # in: [0] way id # does: finds history of a way # out: [0] array of previous versions (where each is # [0] version, [1] db timestamp (string), # [2] visible 0 or 1, # [3] username or 'anonymous' (string)) def getway_history(args) #:doc: wayid=args[0] history=[] sql=<<-EOF SELECT version,timestamp,visible,display_name,data_public FROM ways,users WHERE ways.id=#{wayid} AND ways.user_id=users.id AND ways.visible=1 ORDER BY version DESC EOF histlist=ActiveRecord::Base.connection.select_all(sql) histlist.each { |row| if row['data_public'].to_i==1 then user=row['display_name'] else user='anonymous' end history<<[row['version'],row['timestamp'],row['visible'],user] } [history] end # ----- putway # saves a way to the database # in: [0] user token (string), # [1] original way id (may be negative), # [2] array of points (as getway/getway_old), # [3] hash of way tags, # [4] original way version (0 if not a reverted/undeleted way), # [5] baselong, [6] basey, [7] masterscale # does: saves way to the database # all constituent nodes are created/updated as necessary # (or deleted if they were in the old version and are otherwise unused) # out: [0] 0 (code for success), [1] original way id (unchanged), # [2] new way id, [3] hash of renumbered nodes (old id=>new id), # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox) def putway(args,renumberednodes) #:doc: RAILS_DEFAULT_LOGGER.info(" putway started") usertoken,originalway,points,attributes,oldversion,baselong,basey,masterscale=args uid=getuserid(usertoken) if !uid then return -1,"You are not logged in, so the way could not be saved." end RAILS_DEFAULT_LOGGER.info(" putway authenticated happily") db_uqn='unin'+(rand*100).to_i.to_s+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'+(rand*100).to_i.to_s+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 oldversion=oldversion.to_i RAILS_DEFAULT_LOGGER.info(" Message: putway, id=#{originalway}") # -- Check for null IDs or short ways 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 end if points.length<2 then return -2,"Server error - way is only #{points.length} points long." end # -- 3. read original way into memory xc={}; yc={}; tagc={}; vc={} if originalway>0 way=originalway if oldversion==0 then r=readwayquery(way,false) else r=readwayquery_old(way,oldversion,true) end r.each { |row| id=row['id'].to_i if (id>0) then xc[id]=row['longitude'].to_f yc[id]=row['latitude' ].to_f tagc[id]=row['tags'] vc[id]=row['visible'].to_i end } 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)") 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='' nodelist=[] 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]) tagsql="'"+sqlescape(tagstr)+"'" lat=(ys * 10000000).round long=(xs * 10000000).round tile=QuadTile.tile_for_point(ys, xs) # 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,tile) VALUES ( #{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newnode},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") points[i][2]=newnode nodelist.push(newnode) renumberednodes[node.to_s]=newnode.to_s else points[i][2]=renumberednodes[node.to_s].to_i end elsif xc.has_key?(node) nodelist.push(node) # old node from original way - update if ((xs/0.0000001).round!=(xc[node]/0.0000001).round or (ys/0.0000001).round!=(yc[node]/0.0000001).round or tagstr!=tagc[node] or vc[node]==0) ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{node},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},tags=#{tagsql},visible=1,tile=#{tile} WHERE id=#{node}") end else # old node, created in another way and now added to this way end end # -- 6a. delete any nodes not in modified way createuniquenodes(way,db_uqn,nodelist) # nodes which appear in this way but no other sql=<<-EOF INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile) SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile FROM current_nodes AS cn,#{db_uqn} WHERE cn.id=node_id EOF ActiveRecord::Base.connection.insert(sql) 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) deleteuniquenoderelations(db_uqn,uid,db_now) ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}") # 6b. insert new version of route into way_nodes insertsql ='' currentsql='' sequence =1 points.each do |p| if insertsql !='' then insertsql +=',' end if currentsql!='' then currentsql+=',' end insertsql +="(#{way},#{p[2]},#{sequence},#{version})" currentsql+="(#{way},#{p[2]},#{sequence})" sequence +=1 end ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}"); ActiveRecord::Base.connection.insert( "INSERT INTO way_nodes (id,node_id,sequence_id,version) VALUES #{insertsql}"); ActiveRecord::Base.connection.insert( "INSERT INTO current_way_nodes (id,node_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 insertsql +="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"',#{version})" currentsql+="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"')" end 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 [0,originalway,way,renumberednodes,xmin,xmax,ymin,ymax] end # ----- putpoi # save POI to the database # in: [0] user token (string), # [1] original node id (may be negative), # [2] projected longitude, [3] projected latitude, # [4] hash of tags, [5] visible (0 to delete, 1 otherwise), # [6] baselong, [7] basey, [8] masterscale # does: saves POI node to the database # refuses save if the node has since become part of a way # out: [0] 0 (success), [1] original node id (unchanged), # [2] new node id def putpoi(args) #:doc: usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args uid=getuserid(usertoken) if !uid then return -1,"You are not logged in, so the point could not be saved." end db_now='@now'+(rand*100).to_i.to_s+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 if visible==0 then # if deleting, check node hasn't become part of a way inway=ActiveRecord::Base.connection.select_one("SELECT cw.id FROM current_ways cw,current_way_nodes cwn WHERE cw.id=cwn.id AND cw.visible=1 AND cwn.node_id=#{id} LIMIT 1") unless inway.nil? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end deleteitemrelations(id,'node',uid,db_now) end x=coord2long(x.to_f,masterscale,baselong) y=coord2lat(y.to_f,masterscale,basey) tagsql="'"+sqlescape(array2tag(tags))+"'" lat=(y * 10000000).round long=(x * 10000000).round tile=QuadTile.tile_for_point(y, x) if (id>0) then ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{id},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},visible=#{visible},tags=#{tagsql},tile=#{tile} WHERE id=#{id}"); newid=id else newid=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes (latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); ActiveRecord::Base.connection.update("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newid},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); end [0,id,newid] end # ----- getpoi # read POI from database # (only called on revert: POIs are usually read by whichways) # in: [0] node id, [1] baselong, [2] basey, [3] masterscale # does: reads POI # out: [0] id (unchanged), [1] projected long, [2] projected lat, # [3] hash of tags def getpoi(args) #:doc: id,baselong,basey,masterscale = args n = Node.find(id.to_i) if n return [n.id, n.long_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash] else return [nil,nil,nil,''] end end # ----- deleteway # delete way and constituent nodes from database # in: [0] user token (string), [1] way id # does: deletes way from db and any constituent nodes not used elsewhere # also removes ways/nodes from any relations they're in # out: [0] 0 (success), [1] way id (unchanged) def deleteway(args) #:doc: usertoken,way=args RAILS_DEFAULT_LOGGER.info(" Message: deleteway, id=#{way}") uid=getuserid(usertoken) if !uid then return -1,"You are not logged in, so the way could not be deleted." end way=way.to_i db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars db_now='@now'+(rand*100).to_i.to_s+uid.to_s+way.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()") # - delete any otherwise unused nodes createuniquenodes(way,db_uqn,[]) # unless (preserve.empty?) then # ActiveRecord::Base.connection.execute("DELETE FROM #{db_uqn} WHERE node_id IN ("+preserve.join(',')+")") # end sql=<<-EOF INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile) SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile FROM current_nodes AS cn,#{db_uqn} WHERE cn.id=node_id EOF ActiveRecord::Base.connection.insert(sql) 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) deleteuniquenoderelations(db_uqn,uid,db_now) ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}") # - delete way ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},0)") ActiveRecord::Base.connection.update("UPDATE current_ways SET user_id=#{uid},timestamp=#{db_now},visible=0 WHERE id=#{way}") ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}") ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}") deleteitemrelations(way,'way',uid,db_now) [0,way] end def readwayquery(id,insistonvisible) #:doc: sql=<<-EOF SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags,visible FROM current_way_nodes,current_nodes WHERE current_way_nodes.id=#{id} AND current_way_nodes.node_id=current_nodes.id EOF if insistonvisible then sql+=" AND current_nodes.visible=1 " end sql+=" ORDER BY sequence_id" ActiveRecord::Base.connection.select_all(sql) end # Get the latest version id of a way def getlastversion(id,version) #:doc: old_way = OldWay.find(:first, :conditions => ['visible=1 AND id=?' , id], :order => 'version DESC') old_way.version end def readwayquery_old(id,version,historic) #:doc: # Node handling on undelete (historic=false): # - always use the node specified, even if it's moved # Node handling on revert (historic=true): # - if it's a visible node, use a new node id (i.e. not mucking up the old one) # which means the SWF needs to allocate new ids # - if it's an invisible node, we can reuse the old node id # get node list from specified version of way, # and the _current_ lat/long/tags of each node row=ActiveRecord::Base.connection.select_one("SELECT timestamp FROM ways WHERE version=#{version} AND id=#{id}") waytime=row['timestamp'] sql=<<-EOF SELECT cn.id,visible,latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags FROM way_nodes wn,current_nodes cn WHERE wn.version=#{version} AND wn.id=#{id} AND wn.node_id=cn.id ORDER BY sequence_id EOF rows=ActiveRecord::Base.connection.select_all(sql) # if historic (full revert), get the old version of each node # - if it's in another way now, generate a new id # - if it's not in another way, use the old ID if historic then rows.each_index do |i| sql=<<-EOF SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags,cwn.id AS currentway FROM nodes n LEFT JOIN current_way_nodes cwn ON cwn.node_id=n.id WHERE n.id=#{rows[i]['id']} AND n.timestamp<="#{waytime}" AND cwn.id!=#{id} ORDER BY n.timestamp DESC LIMIT 1 EOF row=ActiveRecord::Base.connection.select_one(sql) unless row.nil? then nx=row['longitude'].to_f ny=row['latitude'].to_f if (row['currentway'] && (nx!=rows[i]['longitude'].to_f or ny!=rows[i]['latitude'].to_f or row['tags']!=rows[i]['tags'])) then rows[i]['id']=-1 end rows[i]['longitude']=nx rows[i]['latitude' ]=ny rows[i]['tags' ]=row['tags'] end end end rows end def createuniquenodes(way,uqn_name,nodelist) #:doc: # Find nodes which appear in this way but no others sql=<<-EOF CREATE TEMPORARY TABLE #{uqn_name} SELECT a.node_id FROM (SELECT DISTINCT node_id FROM current_way_nodes WHERE id=#{way}) a LEFT JOIN current_way_nodes b ON b.node_id=a.node_id AND b.id!=#{way} WHERE b.node_id IS NULL EOF unless nodelist.empty? then sql+="AND a.node_id NOT IN ("+nodelist.join(',')+")" end ActiveRecord::Base.connection.execute(sql) end # ==================================================================== # Relations handling # deleteuniquenoderelations(uqn_name,uid,db_now) # deleteitemrelations(way|node,'way'|'node',uid,db_now) def deleteuniquenoderelations(uqn_name,uid,db_now) #:doc: sql=<<-EOF SELECT node_id,cr.id FROM #{uqn_name},current_relation_members crm,current_relations cr WHERE crm.member_id=node_id AND crm.member_type='node' AND crm.id=cr.id AND cr.visible=1 EOF relnodes=ActiveRecord::Base.connection.select_all(sql) relnodes.each do |a| removefromrelation(a['node_id'],'node',a['id'],uid,db_now) end end def deleteitemrelations(objid,type,uid,db_now) #:doc: sql=<<-EOF SELECT cr.id FROM current_relation_members crm,current_relations cr WHERE crm.member_id=#{objid} AND crm.member_type='#{type}' AND crm.id=cr.id AND cr.visible=1 EOF relways=ActiveRecord::Base.connection.select_all(sql) relways.each do |a| removefromrelation(objid,type,a['id'],uid,db_now) end end def removefromrelation(objid,type,relation,uid,db_now) #:doc: rver=ActiveRecord::Base.connection.insert("INSERT INTO relations (id,user_id,timestamp,visible) VALUES (#{relation},#{uid},#{db_now},1)") tagsql=<<-EOF INSERT INTO relation_tags (id,k,v,version) SELECT id,k,v,#{rver} FROM current_relation_tags WHERE id=#{relation} EOF ActiveRecord::Base.connection.insert(tagsql) membersql=<<-EOF INSERT INTO relation_members (id,member_type,member_id,member_role,version) SELECT id,member_type,member_id,member_role,#{rver} FROM current_relation_members WHERE id=#{relation} AND (member_id!=#{objid} OR member_type!='#{type}') EOF ActiveRecord::Base.connection.insert(membersql) ActiveRecord::Base.connection.update("UPDATE current_relations SET user_id=#{uid},timestamp=#{db_now} WHERE id=#{relation}") ActiveRecord::Base.connection.execute("DELETE FROM current_relation_members WHERE id=#{relation} AND member_type='#{type}' AND member_id=#{objid}") end def sqlescape(a) #:doc: a.gsub(/[\000-\037]/,"").gsub("'","''").gsub(92.chr) {92.chr+92.chr} end def tag2array(a) #:doc: tags={} Tags.split(a) do |k, v| tags[k.gsub(':','|')]=v end tags end def array2tag(a) #:doc: tags = [] a.each do |k,v| if v=='' then next end if v[0,6]=='(type ' then next end tags << [k.gsub('|',':'), v] end return Tags.join(tags) end 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; end # ==================================================================== # Co-ordinate conversion def lat2coord(a,basey,masterscale) #:doc: -(lat2y(a)-basey)*masterscale end def long2coord(a,baselong,masterscale) #:doc: (a-baselong)*masterscale end def lat2y(a) #:doc: 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) end def coord2lat(a,masterscale,basey) #:doc: y2lat(a/-masterscale+basey) end def coord2long(a,masterscale,baselong) #:doc: a/masterscale+baselong end def y2lat(a) 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) end end