Use tile based query when creating a way from unwayed segments.
[rails.git] / app / controllers / amf_controller.rb
index 541926c744ebc9555837757a2d311d757225dd7b..8132b5311b5d412d631517b20457d5388f94a699 100644 (file)
@@ -1,6 +1,9 @@
 class AmfController < ApplicationController
   require 'stringio'
 
+  session :off
+  before_filter :check_write_availability
+
   # to log:
   # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
 
@@ -34,24 +37,29 @@ class AmfController < ApplicationController
       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 '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))
       end
     end
 
     # ------------------
     # Write out response
 
-    response.headers["Content-Type"]="application/x-amf"
+    RAILS_DEFAULT_LOGGER.info("  Response: start")
     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
+       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
 
@@ -60,16 +68,18 @@ class AmfController < ApplicationController
   # ====================================================================
   # Remote calls
 
-  # -----      getpresets
-  #            return presets,presetmenus and presetnames arrays
+  # ----- getpresets
+  #          return presets,presetmenus and presetnames arrays
 
   def getpresets
     presets={}
-    presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]
-    presetnames={}; presetnames['point']={}; presetnames['way']={}
+    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
@@ -89,8 +99,8 @@ unclassified road: highway=unclassified,name=(type road name)
 
 way/footway
 footpath: highway=footway,foot=yes
-bridleway: highway=bridleway,foot=yes,horse=yes,bicycle=yes
-byway: highway=byway,foot=yes,horse=yes,bicycle=yes,motorcar=yes
+bridleway: highway=bridleway,foot=yes
+byway: highway=unsurfaced,foot=yes
 permissive path: highway=footway,foot=permissive
 
 way/cycleway
@@ -115,6 +125,10 @@ 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
@@ -139,6 +153,35 @@ 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/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: point=peak
 EOF
 
     StringIO.open(txt) do |file|
@@ -162,41 +205,49 @@ EOF
     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
+  # ----- 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)
-    waylist=WaySegment.find_by_sql("SELECT DISTINCT current_way_segments.id AS wayid"+
+    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 "+(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+")")
+       "   AND current_ways.id=current_way_segments.id "+
+       "   AND current_ways.visible=1 "+
+       "   AND "+OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes."))
 
-       ways = waylist.collect {|a| a.wayid.to_i } # get an array of way id'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,current_nodes.tags "+
+    pointlist = ActiveRecord::Base.connection.select_all("SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lng,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 "+(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+") "+
+       " WHERE "+OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")+
        "   AND cs1.id IS NULL AND cs2.id IS NULL "+
        "   AND current_nodes.visible=1")
 
-           points = pointlist.collect {|a| [a['id'],tag2array(a['tags'])]      } # get a list of node ids and their tags
+    points = pointlist.collect {|a| [a['id'],long2coord(a['lng'].to_f,baselong,masterscale),lat2coord(a['lat'].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
+  # ----- 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
@@ -206,6 +257,8 @@ EOF
     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)
@@ -240,6 +293,8 @@ EOF
     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={}
@@ -250,7 +305,7 @@ EOF
         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}")
+      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
@@ -263,7 +318,7 @@ EOF
 
     xmin = ymin = 999999
     xmax = ymax = -999999
-    insertsql = nodelist =  ''
+    insertsql = ''
     renumberednodes={}
 
     points.each_index do |i|
@@ -273,65 +328,67 @@ EOF
       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)+"'"
+      lat=(ys * 10000000).round
+      long=(xs * 10000000).round
+      tile=QuadTile.tile_for_point(ys, xs)
 
       # compare node
       if node<0
         # new node - create
-        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
+       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
+          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}")
-        else
-          if (nodelist!='') then nodelist+=',' end; nodelist+=node.to_s
+        if (xs!=xc[node] or ys!=yc[node] or tagstr!=tagc[node])
+          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
-        if (nodelist!='') then nodelist+=',' end; nodelist+=node.to_s
       end
-
     end
 
-    if nodelist!='' then
-      ActiveRecord::Base.connection.update("UPDATE current_nodes SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id IN (#{nodelist})")
-    end
 
     # -- 6.i compare segments
 
     numberedsegments={}
-    seglist=''
+    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,'')")
+            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
-    # numberedsegments.each{|a,b| RAILS_DEFAULT_LOGGER.error("Sending back: seg no. #{a} -> id #{b}") }
-
-    if seglist!='' then
-      ActiveRecord::Base.connection.update("UPDATE current_segments SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id IN (#{seglist})")
-    end
 
 
     # -- 6.ii insert new way segments
 
-    createuniquesegments(way,db_uqs)
+    createuniquesegments(way,db_uqs,seglist)   # segments which appear in this way but no other
 
     #          delete segments from uniquesegments (and not in modified way)
 
@@ -340,7 +397,6 @@ EOF
       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 
-         AND (cs.timestamp!=#{db_now} OR cs.user_id!=#{uid})
     EOF
     ActiveRecord::Base.connection.insert(sql)
 
@@ -348,19 +404,18 @@ 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 
-          AND (cs.timestamp!=#{db_now} OR cs.user_id!=#{uid})
     EOF
     ActiveRecord::Base.connection.update(sql)
 
     #          delete nodes not in modified way or any other segments
 
-    createuniquenodes(db_uqs,db_uqn)
+    createuniquenodes(db_uqs,db_uqn)   # nodes which appear in this way but no other
 
     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
+       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)
 
@@ -397,11 +452,13 @@ EOF
     insertsql =''
     currentsql=''
     attributes.each do |k,v|
-      if v=='' then next end
+      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)+"','"+sqlescape(v)+"',version)"
+         k=k.gsub(/[\000-\037]/,"")
+         v=v.gsub(/[\000-\037]/,"")
+      insertsql +="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"',#{version})"
       currentsql+="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"')"
     end
 
@@ -412,84 +469,282 @@ EOF
     [originalway,way,renumberednodes,numberedsegments,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)
+    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))+"'"
+    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
+    [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)
   #                    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 end
-       way=way.to_i
+    way=way.to_i
 
-       db_uqs='uniq'+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s     # temp uniquesegments table name, typically 51 chars
-       db_uqn='unin'+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'+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()")
-       createuniquesegments(way,db_uqs)
+    db_uqs='uniq'+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s        # temp uniquesegments table name, typically 51 chars
+    db_uqn='unin'+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'+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()")
+    createuniquesegments(way,db_uqs,'')
 
-       # -     delete any otherwise unused segments
+    # -        delete any otherwise unused segments
 
-       sql=<<-EOF
+    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
     EOF
-       ActiveRecord::Base.connection.insert(sql)
+    ActiveRecord::Base.connection.insert(sql)
 
-       sql=<<-EOF
+    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
     EOF
-       ActiveRecord::Base.connection.update(sql)
+    ActiveRecord::Base.connection.update(sql)
 
-       # - delete any unused nodes
+    # - delete any unused nodes
   
     createuniquenodes(db_uqs,db_uqn)
 
-       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
+    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)
+    ActiveRecord::Base.connection.insert(sql)
 
-       sql=<<-EOF
+    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.update(sql)
+       
+    ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqs}")
+    ActiveRecord::Base.connection.execute("DROP 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_segments WHERE id=#{way}")
+    ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}")
+       
+    way
+end
+
+# ----- makeway(x,y,baselong,basey,masterscale)
+#              returns way made from unwayed segments
+
+def makeway(args)
+       usertoken,x,y,baselong,basey,masterscale=args
+    uid=getuserid(usertoken)
+    return if !uid
+
+       points=[]
+       toreverse=[]                            # segments to reverse
+       nodesused={}                            # so we don't go over the same node twice
+
+       # - find start point near x
+       
+       xc=coord2long(x,masterscale,baselong)
+       yc=coord2lat(y,masterscale,basey)
+
+        RAILS_DEFAULT_LOGGER.info("  Message: makeway, xc=#{xc}, y=#{yc}")
+
+       xs1=xc-0.001; xs2=xc+0.001
+       ys1=yc-0.001; ys2=yc+0.001
+       
+       sql=<<-EOF
+               SELECT cn1.latitude*0.0000001 AS lat1,cn1.longitude*0.0000001 AS lon1,cn1.id AS id1,
+                      cn2.latitude*0.0000001 AS lat2,cn2.longitude*0.0000001 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 #{OSM.sql_for_area(ys1,xs1,ys2,xs2,"cn1.")}
+                  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]
        
-       ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqs}")
-       ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqn}")
+       # - 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
 
-       # - delete way
+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*0.0000001 AS lat1,cn1.longitude*0.0000001 AS lon1,cn1.id AS id1,
+                      cn2.latitude*0.0000001 AS lat2,cn2.longitude*0.0000001 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*0.0000001 AS lat1,cn1.longitude*0.0000001 AS lon1,cn1.id AS id1,
+                      cn2.latitude*0.0000001 AS lat2,cn2.longitude*0.0000001 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
        
-       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_segments WHERE id=#{way}")
-       ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}")
+       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
        
-       way
+       # 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
 
+
 # ====================================================================
 # Support functions for remote calls
 
 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 "+
+  ActiveRecord::Base.connection.select_all "SELECT n1.latitude*0.0000001 AS lat1,n1.longitude*0.0000001 AS long1,n1.id AS id1,n1.tags as tags1, "+
+      "                  n2.latitude*0.0000001 AS lat2,n2.longitude*0.0000001 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 n1.id=node_a and n2.id=node_b "+
+      "     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
 
-def createuniquesegments(way,uqs_name)
-  # Finds segments which appear in this way and no other
+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
@@ -500,24 +755,40 @@ def createuniquesegments(way,uqs_name)
                  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
 
 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 OR 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
+       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
@@ -551,12 +822,13 @@ def array2tag(a)
 end
 
 def getuserid(token)
-  token=sqlescape(token)
-  if (token=~/^(.+)\+(.+)$/) then
-    return ActiveRecord::Base.connection.select_value("SELECT id FROM users WHERE active=1 AND timeout>NOW() AND email='#{$1}' AND pass_crypt=MD5('#{$2}')")
+  if (token =~ /^(.+)\+(.+)$/) then
+    user = User.authenticate(:username => $1, :password => $2)
   else
-    return ActiveRecord::Base.connection.select_value("SELECT id FROM users WHERE active=1 AND timeout>NOW() AND token='#{token}'")
+    user = User.authenticate(:token => token)
   end
+
+  return user ? user.id : nil;
 end
 
 
@@ -619,9 +891,9 @@ def getvalue(s)
   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
+                   return getobject(s)                 #  |
+  when 10;     return getarray(s)                      # array
+  else;                return nil                                      # error
   end
 end