X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/e5a5f957ef46d76ec78e2c0450b50a086dff82b6..cb330ffd7a1861830c813d35507ef4b8b288d8f0:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 38c567734..b7667b71d 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,319 +1,976 @@ class AmfController < ApplicationController require 'stringio' - # Still to do: - # - all db interaction - # - user authentication - # - (also pass lat/lon through from view tab to edit tab) - -# to log: -# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") + session :off + before_filter :check_write_availability + # AMF controller for 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). + # + # Public domain. Set your tab width to 4 to read this document. :) + # editions Systeme D / Richard Fairhurst 2004-2007 + + # 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]}") # ==================================================================== # Main AMF handler - + # ---- talk process AMF request 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 - - # ------------- - # Parse request - - headers=getint(req) # Read number of headers - for i in (1..headers) # Read each header - name=getstring(req) # | - req.getc # | skip boolean - value=getvalue(req) # | - header["name"]=value # | - end + 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 - bodies=getint(req) # Read number of bodies - for i in (1..bodies) # 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)) + # ------------- + # 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 + + 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 'whichways_deleted'; results[index]=putdata(index,whichways_deleted(args)) + when 'getway'; results[index]=putdata(index,getway(args)) + when 'getway_old'; results[index]=putdata(index,getway_old(args)) + when 'getway_history'; results[index]=putdata(index,getway_history(args)) + when 'putway'; results[index]=putdata(index,putway(args)) + when 'deleteway'; results[index]=putdata(index,deleteway(args)) + when 'putpoi'; results[index]=putdata(index,putpoi(args)) + when 'getpoi'; results[index]=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 - end + } + RAILS_DEFAULT_LOGGER.info(" Response: end") + + end - # ------------------ - # Write out response + private - response.headers["Content-Type"]="application/x-amf" - a,b=results.length.divmod(256) - ans=0.chr+0.chr+0.chr+0.chr+a.chr+b.chr - results.each do |k,v| - ans+=v - end - render :text=>ans + # ==================================================================== + # 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) +tertiary road: highway=tertiary,ref=,name=(type road name) +residential road: highway=residential,ref=,name=(type road name) +unclassified road: highway=unclassified,ref=,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) +stream: waterway=stream,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: natural=water,landuse= +forest: landuse=forest,natural= + +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: natural=peak + +POI/road +car park: amenity=parking +petrol station: amenity=fuel + +POI/cycleway +bike park: amenity=bicycle_parking + +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),denomination= +post box: amenity=post_box,tourism=,name=,religion=,denomination= +post office: amenity=post_office,tourism=,name=,religion=,denomination= +pub: tourism=,amenity=pub,name=(type name here),religion=,denomination= + +POI/natural +peak: natural=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 + } + end + } + end + [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 - # ==================================================================== - # Remote calls - - def getpresets - presets={} - presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[] - presetnames={}; presetnames['point']={}; presetnames['way']={} - presettype='' - presetcategory='' - - File.open("config/potlatch/presets.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 - } - end - } - end - [presets,presetmenus,presetnames] - end + 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] - def whichways(args) - waylist=WaySegment.find_by_sql("SELECT DISTINCT current_way_segments.id AS wayid"+ - " FROM current_way_segments,current_segments,current_nodes "+ - " WHERE segment_id=current_segments.id "+ - " AND node_a=current_nodes.id "+ - " AND (latitude BETWEEN "+(args[1].to_f-0.01).to_s+" AND "+(args[3].to_f+0.01).to_s+") "+ - " AND (longitude BETWEEN "+(args[0].to_f-0.01).to_s+" AND "+(args[2].to_f+0.01).to_s+")") - ways=[] - waylist.each {|a| - ways<0 + way=originalway + if oldversion==0 + readwayquery(way).each { |row| + id=row['id'].to_i + xc[id]=row['longitude'].to_f + yc[id]=row['latitude' ].to_f + tagc[id]=row['tags'] + vc[id]=1 + } + else + readwayquery_old(way,oldversion,true).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 + } + 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='' + renumberednodes={} + 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!=xc[node] 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 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 (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) + 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) - # ----- 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) - -(lat2y(a)-$basey)*$masterscale+250 - end - - def long2coord(a) - (a-$baselong)*$masterscale+350 - end + 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 (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*0.0000001 AS lat,longitude*0.0000001 AS lng,tags "+ + "FROM current_nodes WHERE visible=1 AND id=#{id}") + if poi.nil? then return [nil,nil,nil,''] end + [id, + long2coord(poi['lng'].to_f,baselong,masterscale), + lat2coord(poi['lat'].to_f,basey,masterscale), + tag2array(poi['tags'])] + end + + # ----- deleteway (user token, way, nodes to keep) + # returns way ID only + + def deleteway(args) + 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 TABLE #{db_uqn}") + + # - delete way - def lat2y(a) - 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) + 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 + + + +# ==================================================================== +# Support functions for remote calls + +def readwayquery(id) + ActiveRecord::Base.connection.select_all "SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags "+ + " FROM current_way_nodes,current_nodes "+ + " WHERE current_way_nodes.id=#{id} "+ + " AND current_way_nodes.node_id=current_nodes.id "+ + " AND current_nodes.visible=1 "+ + " ORDER BY sequence_id" +end + +def getlastversion(id,version) + row=ActiveRecord::Base.connection.select_one("SELECT version FROM ways WHERE id=#{id} AND visible=1 ORDER BY version DESC LIMIT 1") + row['version'] +end + +def readwayquery_old(id,version,historic) + # 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, + # and use this (though with a new id) if it differs from the current one + if historic then + rows.each_index do |i| + sql=<<-EOF + SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags + FROM nodes + WHERE id=#{rows[i]['id']} + AND timestamp<="#{waytime}" + ORDER BY 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 (nx!=rows[i]['longitude'].to_f or ny!=rows[i]['latitude'].to_f or row['tags']!=rows[i]['tags']) then + rows[i]['id']=-1 + # This generates a new node id if x/y/tags differ from current node. + # Strictly speaking, it need only do this for uniquenodes, but we're + # not generating uniquenodes for historic ways (yet!). + 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) + # 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 - - def coord2lat(a) - y2lat((a-250)/-$masterscale+$basey) + ActiveRecord::Base.connection.execute(sql) +end + + + +# ==================================================================== +# Relations handling +# deleteuniquenoderelations(uqn_name,uid,db_now) +# deleteitemrelations(way|node,'way'|'node',uid,db_now) + +def deleteuniquenoderelations(uqn_name,uid,db_now) + sql=<<-EOF + SELECT node_id,cr.id FROM #{uqn_name},current_relation_members crm,current_relations cr + WHERE crm.member_id=node_id + AND crm.member_type='node' + AND crm.id=cr.id + AND cr.visible=1 + EOF + + relnodes=ActiveRecord::Base.connection.select_all(sql) + relnodes.each do |a| + removefromrelation(a['node_id'],'node',a['id'],uid,db_now) end +end + +def deleteitemrelations(objid,type,uid,db_now) + sql=<<-EOF + SELECT cr.id FROM current_relation_members crm,current_relations cr + WHERE crm.member_id=#{objid} + AND crm.member_type='#{type}' + AND crm.id=cr.id + AND cr.visible=1 + EOF - def coord2long(a) - (a-350)/$masterscale+$baselong + relways=ActiveRecord::Base.connection.select_all(sql) + relways.each do |a| + removefromrelation(objid,type,a['id'],uid,db_now) end +end + +def removefromrelation(objid,type,relation,uid,db_now) + rver=ActiveRecord::Base.connection.insert("INSERT INTO relations (id,user_id,timestamp,visible) VALUES (#{relation},#{uid},#{db_now},1)") + + tagsql=<<-EOF + INSERT INTO relation_tags (id,k,v,version) + SELECT id,k,v,#{rver} FROM current_relation_tags + WHERE id=#{relation} + EOF + ActiveRecord::Base.connection.insert(tagsql) + + membersql=<<-EOF + INSERT INTO relation_members (id,member_type,member_id,member_role,version) + SELECT id,member_type,member_id,member_role,#{rver} FROM current_relation_members + WHERE id=#{relation} + AND (member_id!=#{objid} OR member_type!='#{type}') + EOF + ActiveRecord::Base.connection.insert(membersql) - def y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) - end + ActiveRecord::Base.connection.update("UPDATE current_relations SET user_id=#{uid},timestamp=#{db_now} WHERE id=#{relation}") + ActiveRecord::Base.connection.execute("DELETE FROM current_relation_members WHERE id=#{relation} AND member_type='#{type}' AND member_id=#{objid}") +end +def sqlescape(a) + a.gsub(/[\000-\037]/,"").gsub("'","''").gsub(92.chr) {92.chr+92.chr} +end + +def tag2array(a) + tags={} + Tags.split(a) do |k, v| + tags[k.gsub(':','|')]=v + end + tags +end + +def array2tag(a) + tags = [] + a.each do |k,v| + if v=='' then next end + if v[0,6]=='(type ' then next end + tags << [k.gsub('|',':'), v] + end + return Tags.join(tags) +end + +def getuserid(token) + if (token =~ /^(.+)\+(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end + + return user ? user.id : nil; +end + + + +# ==================================================================== +# AMF read subroutines + +# ----- 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 + +def getint(s) + s.getc*256+s.getc +end + +def getlong(s) + ((s.getc*256+s.getc)*256+s.getc)*256+s.getc +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 + +def getarray(s) + len=getlong(s) + arr=[] + for i in (0..len-1) + arr[i]=getvalue(s) + end + arr +end + +def getobject(s) + arr={} + while (key=getstring(s)) + if (key=='') then break end + arr[key]=getvalue(s) + 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 + 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) + end + a + when 'Hash' + a=3.chr + n.each do |k,v| + a+=encodestring(k)+encodevalue(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) + 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) +end + end