X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/0944c1cf02ca3f2b17c9261e57a9a0b0c210a40d..6d07f5661a4530b334ab752044536e8bdb201b02:/app/controllers/amf_controller.rb?ds=inline diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index a9a56203a..d30043e59 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,632 +1,896 @@ class AmfController < ApplicationController -#=begin require 'stringio' + session :off + before_filter :check_availability + # to log: # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") # ==================================================================== # Main AMF handler - + # ---- 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 - - 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)) + 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 + + 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 '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)) + 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") - # ------------------ - # Write out response + end - 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 + private + # ==================================================================== + # Remote calls + + # ----- getpresets + # return presets,presetmenus and presetnames arrays + + def getpresets + presets={} + presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[] + presetnames={}; presetnames['point']={}; presetnames['way']={} + presettype='' + presetcategory='' + + RAILS_DEFAULT_LOGGER.info(" Message: getpresets") + + # File.open("config/potlatch/presets.txt") do |file| + + # Temporary patch to get around filepath problem + # To remove this patch and make the code nice again: + # 1. uncomment above line + # 2. fix the path in the above line + # 3. delete this here document, and the following line (StringIO....) + + txt=<<-EOF +way/road +motorway: highway=motorway,ref=(type road number) +trunk road: highway=trunk,ref=(type road number),name=(type road name) +primary road: highway=primary,ref=(type road number),name=(type road name) +secondary road: highway=secondary,ref=(type road number),name=(type road name) +residential road: highway=residential,name=(type road name) +unclassified road: highway=unclassified,name=(type road name) + +way/footway +footpath: highway=footway,foot=yes +bridleway: highway=bridleway,foot=yes,horse=yes,bicycle=yes +byway: highway=byway,foot=yes,horse=yes,bicycle=yes,motorcar=yes +permissive path: highway=footway,foot=permissive + +way/cycleway +cycle lane: highway=cycleway,cycleway=lane,ncn_ref= +cycle track: highway=cycleway,cycleway=track,ncn_ref= +cycle lane (NCN): highway=cycleway,cycleway=lane,name=(type name here),ncn_ref=(type route number) +cycle track (NCN): highway=cycleway,cycleway=track,name=(type name here),ncn_ref=(type route number) + +way/waterway +canal: waterway=canal,name=(type name here) +navigable river: waterway=river,boat=yes,name=(type name here) +navigable drain: waterway=drain,boat=yes,name=(type name here) +derelict canal: waterway=derelict_canal,name=(type name here) +unnavigable river: waterway=river,boat=no,name=(type name here) +unnavigable drain: waterway=drain,boat=no,name=(type name here) + +way/railway +railway: railway=rail +tramway: railway=tram +light railway: railway=light_rail +preserved railway: railway=preserved +disused railway tracks: railway=disused +course of old railway: railway=abandoned + +way/natural +forest: natural=wood,landuse=forest +woodland: natural=wood,landuse= +reservoir: natural=water,landuse=reservoir +lake: natural=water,landuse= +marsh: natural=marsh +beach: natural=beach +coastline: natural=coastline + +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 +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 + return [presets,presetmenus,presetnames] end - private - - # ==================================================================== - # Remote calls - - # ----- getpresets - # return presets,presetmenus and presetnames arrays - - 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 + # ----- whichways(left,bottom,right,top) + # return array of ways in current bounding box + # at present, instead of using correct (=more complex) SQL to find + # corner-crossing ways, it simply enlarges the bounding box by +/- 0.01 + + def whichways(args) + xmin = args[0].to_f-0.01 + ymin = args[1].to_f-0.01 + xmax = args[2].to_f+0.01 + ymax = args[3].to_f+0.01 + + RAILS_DEFAULT_LOGGER.info(" Message: whichways, bbox=#{xmin},#{ymin},#{xmax},#{ymax}") + + waylist=WayNode.find_by_sql("SELECT DISTINCT current_way_nodes.id AS wayid"+ + " FROM current_way_nodes,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_nodes.id "+ + " AND current_ways.visible=1 "+ + " AND (latitude BETWEEN "+ymin.to_s+" AND "+ymax.to_s+") "+ + " AND (longitude BETWEEN "+xmin.to_s+" AND "+xmax.to_s+")") + + ways = waylist.collect {|a| a.wayid.to_i } # get an array of way id's + + pointlist =ActiveRecord::Base.connection.select_all("SELECT current_nodes.id,current_nodes.tags "+ + " FROM current_nodes "+ + " LEFT OUTER JOIN current_segments cs1 ON cs1.node_a=current_nodes.id "+ + " LEFT OUTER JOIN current_segments cs2 ON cs2.node_b=current_nodes.id "+ + " WHERE (latitude BETWEEN "+ymin.to_s+" AND "+ymax.to_s+") "+ + " AND (longitude BETWEEN "+xmin.to_s+" AND "+xmax.to_s+") "+ + " AND cs1.id IS NULL AND cs2.id IS NULL "+ + " AND current_nodes.visible=1") + + points = pointlist.collect {|a| [a['id'],tag2array(a['tags'])] } # get a list of node ids and their tags + + return [ways,points] + end - # ----- whichways(left,bottom,right,top) - # return array of ways in current bounding box - # at present, instead of using correct (=more complex) SQL to find - # corner-crossing ways, it simply enlarges the bounding box by +/- 0.01 - - def whichways(args) - 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 current_segments.visible=1 "+ - " 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 - readwayquery(way).each { |row| - id1=row['id1'].to_i; xc[id1]=row['long1'].to_f; yc[id1]=row['lat1'].to_f; tagc[id1]=row['tags1'] - id2=row['id2'].to_i; xc[id2]=row['long2'].to_f; yc[id2]=row['lat2'].to_f; tagc[id2]=row['tags2'] - seg[row['segment_id'].to_i]=id1.to_s+'-'+id2.to_s - } + # ----- putway (user token, way, array of co-ordinates, array of attributes, + # baselong, basey, masterscale) + # returns current way ID, new way ID, hash of renumbered nodes, + # xmin,xmax,ymin,ymax + + def putway(args) + usertoken,originalway,points,attributes,baselong,basey,masterscale=args + uid=getuserid(usertoken) + return if !uid + db_uqs='uniq'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquesegments table name, typically 51 chars + db_uqn='unin'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars + db_now='@now'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars + ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") + originalway=originalway.to_i + + RAILS_DEFAULT_LOGGER.info(" Message: putway, id=#{originalway}") + + # -- 3. read original way into memory + + xc={}; yc={}; tagc={}; seg={} + if originalway>0 + way=originalway + readwayquery(way).each { |row| + id1=row['id1'].to_i; xc[id1]=row['long1'].to_f; yc[id1]=row['lat1'].to_f; tagc[id1]=row['tags1'] + id2=row['id2'].to_i; xc[id2]=row['long2'].to_f; yc[id2]=row['lat2'].to_f; tagc[id2]=row['tags2'] + seg[row['segment_id'].to_i]=id1.to_s+'-'+id2.to_s + } + ActiveRecord::Base.connection.update("UPDATE current_ways SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id=#{way}") + else + way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)") + end + + # -- 4. get version by inserting new row into ways + + version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)") + + # -- 5. compare nodes and update xmin,xmax,ymin,ymax + + xmin = ymin = 999999 + xmax = ymax = -999999 + insertsql = '' + renumberednodes={} + + points.each_index do |i| + xs=coord2long(points[i][0],masterscale,baselong) + ys=coord2lat(points[i][1],masterscale,basey) + xmin=[xs,xmin].min; xmax=[xs,xmax].max + ymin=[ys,ymin].min; ymax=[ys,ymax].max + node=points[i][2].to_i + tagstr=array2tag(points[i][4]) + tagstr=tagstr.gsub(/[\000-\037]/,"") + tagsql="'"+sqlescape(tagstr)+"'" + + # compare node + if node<0 + # new node - create + if renumberednodes[node.to_s].nil? + newnode=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes ( latitude,longitude,timestamp,user_id,visible,tags) VALUES ( #{ys},#{xs},#{db_now},#{uid},1,#{tagsql})") + ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags) VALUES (#{newnode},#{ys},#{xs},#{db_now},#{uid},1,#{tagsql})") + points[i][2]=newnode + renumberednodes[node.to_s]=newnode.to_s else - way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)") + points[i][2]=renumberednodes[node.to_s].to_i end - # -- 4. get version by inserting new row into ways + 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}") + end + else + # old node, created in another way and now added to this way + end + + end + + + # -- 6.i compare segments + + numberedsegments={} + seglist='' # list of existing segments that we want to keep + for i in (0..(points.length-2)) + if (points[i+1][3].to_i==0) then next end + segid=points[i+1][5].to_i + from =points[i ][2].to_i + to =points[i+1][2].to_i + if seg.has_key?(segid) + # if segment exists, check it still refers to the same nodes + if seg[segid]=="#{from}-#{to}" then + if (seglist!='') then seglist+=',' end; seglist+=segid.to_s + next + end + elsif segid>0 + # not in previous version of way, but supplied, so assume + # that it's come from makeway (i.e. unwayed segments) + if (seglist!='') then seglist+=',' end; seglist+=segid.to_s + next + end + segid=ActiveRecord::Base.connection.insert("INSERT INTO current_segments ( node_a,node_b,timestamp,user_id,visible,tags) VALUES ( #{from},#{to},#{db_now},#{uid},1,'')") + ActiveRecord::Base.connection.insert("INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible,tags) VALUES (#{segid},#{from},#{to},#{db_now},#{uid},1,'')") + points[i+1][5]=segid + numberedsegments[(i+1).to_s]=segid.to_s + end + + + # -- 6.ii insert new way segments + + createuniquesegments(way,db_uqs,seglist) # segments which appear in this way but no other + + # delete segments from uniquesegments (and not in modified way) + + sql=<<-EOF + INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible) + SELECT DISTINCT segment_id,node_a,node_b,#{db_now},#{uid},0 + FROM current_segments AS cs, #{db_uqs} AS us + WHERE cs.id=us.segment_id AND cs.visible=1 + EOF + ActiveRecord::Base.connection.insert(sql) + + sql=<<-EOF + UPDATE current_segments AS cs, #{db_uqs} AS us + SET cs.timestamp=#{db_now},cs.visible=0,cs.user_id=#{uid} + WHERE cs.id=us.segment_id AND cs.visible=1 + EOF + ActiveRecord::Base.connection.update(sql) + + # delete nodes not in modified way or any other segments + + 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 + 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) + + ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqs}") + ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqn}") + + # insert new version of route into way_nodes + + insertsql ='' + currentsql='' + sequence =1 + for i in (0..(points.length-2)) + if (points[i+1][3].to_i==0) then next end + if insertsql !='' then insertsql +=',' end + if currentsql!='' then currentsql+=',' end + insertsql +="(#{way},#{points[i+1][5]},#{version})" + currentsql+="(#{way},#{points[i+1][5]},#{sequence})" + sequence +=1 + end + + ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}"); + ActiveRecord::Base.connection.insert("INSERT INTO way_nodes (id,segment_id,version ) VALUES #{insertsql}"); + ActiveRecord::Base.connection.insert("INSERT INTO current_way_nodes (id,segment_id,sequence_id) VALUES #{currentsql}"); + + # -- 7. insert new way tags + + insertsql ='' + currentsql='' + attributes.each do |k,v| + if v=='' or v.nil? then next end + if v[0,6]=='(type ' then next end + if insertsql !='' then insertsql +=',' end + if currentsql!='' then currentsql+=',' end + k=k.gsub(/[\000-\037]/,"") + v=v.gsub(/[\000-\037]/,"") + insertsql +="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"',#{version})" + currentsql+="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"')" + end + + 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 + + [originalway,way,renumberednodes,numberedsegments,xmin,xmax,ymin,ymax] + end - version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)") + # ----- deleteway (user token, way) + # returns way ID only - # -- 5. compare nodes and update xmin,xmax,ymin,ymax + def deleteway(args) + usertoken,way=args - xmin=999999; xmax=-999999 - ymin=999999; ymax=-999999 - insertsql='' - nodelist='' - renumberednodes={} - - points.each_index do |i| - xs=coord2long(points[i][0],masterscale,baselong) - ys=coord2lat(points[i][1],masterscale,basey) - xmin=[xs,xmin].min; xmax=[xs,xmax].max - ymin=[ys,ymin].min; ymax=[ys,ymax].max - node=points[i][2].to_i - tagstr=array2tag(points[i][4]) - tagsql="'"+sqlescape(tagstr)+"'" - - # 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 - - 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 - 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 + RAILS_DEFAULT_LOGGER.info(" Message: deleteway, id=#{way}") - # -- 6.i compare segments - - numberedsegments={} - seglist='' - 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 seg[segid]=="#{from}-#{to}" then - if (seglist!='') then seglist+=',' end; seglist+=segid.to_s - next - end - end - segid=ActiveRecord::Base.connection.insert("INSERT INTO current_segments ( node_a,node_b,timestamp,user_id,visible,tags) VALUES ( #{from},#{to},#{db_now},#{uid},1,'')") - ActiveRecord::Base.connection.insert("INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible,tags) VALUES (#{segid},#{from},#{to},#{db_now},#{uid},1,'')") - points[i+1][5]=segid - numberedsegments[(i+1).to_s]=segid.to_s - end - # numberedsegments.each{|a,b| RAILS_DEFAULT_LOGGER.error("Sending back: seg no. #{a} -> id #{b}") } + uid=getuserid(usertoken); if !uid then return end + way=way.to_i - if seglist!='' then - ActiveRecord::Base.connection.update("UPDATE current_segments SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id IN (#{seglist})") - end + 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 - # -- 6.ii insert new way segments + 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) - createuniquesegments(way,db_uqs) + 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) - # a='' - # ActiveRecord::Base.connection.select_values("SELECT segment_id FROM #{db_uqs}").each {|b| a+=b+',' } - # RAILS_DEFAULT_LOGGER.error("Unique segments are #{a}") - # a=ActiveRecord::Base.connection.select_value("SELECT #{db_now}") - # RAILS_DEFAULT_LOGGER.error("Timestamp of this edit is #{a}") - # RAILS_DEFAULT_LOGGER.error("Userid of this edit is #{uid}") + # - 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 + 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) + + 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_nodes WHERE id=#{way}") + ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}") + + way +end - # delete nodes from uniquesegments (and not in modified way) - +# ----- 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 AS lat1,cn1.longitude AS lon1,cn1.id AS id1, + cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid + FROM current_nodes AS cn1, + current_nodes AS cn2, + current_segments AS cs + LEFT OUTER JOIN current_way_nodes ON segment_id=cs.id + WHERE (cn1.longitude BETWEEN #{xs1} AND #{xs2}) + AND (cn1.latitude BETWEEN #{ys1} AND #{ys2}) + AND segment_id IS NULL + AND cs.visible=1 + AND cn1.id=node_a AND cn1.visible=1 + AND cn2.id=node_b AND cn2.visible=1 + ORDER BY SQRT(POW(cn1.longitude-#{xc},2)+ + POW(cn1.latitude -#{yc},2)) + LIMIT 1 + EOF + row=ActiveRecord::Base.connection.select_one sql + if row.nil? then return [0,0,0,0,0] end + xs1=long2coord(row['lon1'].to_f,baselong,masterscale); ys1=lat2coord(row['lat1'].to_f,basey,masterscale) + xs2=long2coord(row['lon2'].to_f,baselong,masterscale); ys2=lat2coord(row['lat2'].to_f,basey,masterscale) + xmin=[xs1,xs2].min; xmax=[xs1,xs2].max + ymin=[ys1,ys2].min; ymax=[ys1,ys2].max + nodesused[row['id1'].to_i]=true + nodesused[row['id2'].to_i]=true + points<<[xs1,ys1,row['id1'].to_i,1,{},0] + points<<[xs2,ys2,row['id2'].to_i,1,{},row['segid'].to_i] + + # - extend at start, then end + while (a,point,nodesused,toreverse=findconnect(points[0][2],nodesused,'b',toreverse,baselong,basey,masterscale))[0] + points[0][5]=point[5]; point[5]=0 # segment leads to next node + points.unshift(point) + xmin=[point[0],xmin].min; xmax=[point[0],xmax].max + ymin=[point[1],ymin].min; ymax=[point[1],ymax].max + end + while (a,point,nodesused,toreverse=findconnect(points[-1][2],nodesused,'a',toreverse,baselong,basey,masterscale))[0] + points.push(point) + xmin=[point[0],xmin].min; xmax=[point[0],xmax].max + ymin=[point[1],ymin].min; ymax=[point[1],ymax].max + end + points[0][3]=0 # start with a move + + # reverse segments in toreverse + if toreverse.length>0 sql=<<-EOF - 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, - current_segments AS cs, - #{db_uqs} AS us - WHERE(cn.id=cs.node_a OR cn.id=cs.node_b) - AND cs.id=us.segment_id AND cs.visible=1 - AND (cn.timestamp!=#{db_now} OR cn.user_id!=#{uid}) + 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.insert(sql) - + ActiveRecord::Base.connection.update sql sql=<<-EOF - UPDATE current_nodes AS cn, - current_segments AS cs, - #{db_uqs} AS us - SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid} - WHERE (cn.id=cs.node_a OR cn.id=cs.node_b) - AND cs.id=us.segment_id AND cs.visible=1 - AND (cn.timestamp!=#{db_now} OR cn.user_id!=#{uid}) + INSERT INTO segments + (SELECT * FROM current_segments + WHERE id IN (#{toreverse.join(',')})) EOF - ActiveRecord::Base.connection.update(sql) - - # delete segments from uniquesegments (and not in modified way) - - sql=<<-EOF - INSERT INTO segments (id,node_a,node_b,timestamp,user_id,visible) - SELECT DISTINCT segment_id,node_a,node_b,#{db_now},#{uid},0 - FROM current_segments AS cs, #{db_uqs} AS us - WHERE cs.id=us.segment_id AND cs.visible=1 - AND (cs.timestamp!=#{db_now} OR cs.user_id!=#{uid}) - EOF - ActiveRecord::Base.connection.insert(sql) - - sql=<<-EOF - UPDATE current_segments AS cs, #{db_uqs} AS us - SET cs.timestamp=#{db_now},cs.visible=0,cs.user_id=#{uid} - WHERE cs.id=us.segment_id AND cs.visible=1 - AND (cs.timestamp!=#{db_now} OR cs.user_id!=#{uid}) - EOF - ActiveRecord::Base.connection.update(sql) - ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqs}") + ActiveRecord::Base.connection.insert sql + end - # insert new version of route into way_segments - - insertsql ='' - currentsql='' - sequence =1 - for i in (0..(points.length-2)) - if (points[i+1][3].to_i==0) then next end - if insertsql !='' then insertsql +=',' end - if currentsql!='' then currentsql+=',' end - insertsql +="(#{way},#{points[i+1][5]},#{version})" - currentsql+="(#{way},#{points[i+1][5]},#{sequence})" - sequence +=1 - end - - ActiveRecord::Base.connection.execute("DELETE FROM current_way_segments WHERE id=#{way}"); - ActiveRecord::Base.connection.insert("INSERT INTO way_segments (id,segment_id,version ) VALUES #{insertsql}"); - ActiveRecord::Base.connection.insert("INSERT INTO current_way_segments (id,segment_id,sequence_id) VALUES #{currentsql}"); - - # -- 7. insert new way tags - - insertsql ='' - currentsql='' - attributes.each do |k,v| - if v=='' 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)" - currentsql+="(#{way},'"+sqlescape(k)+"','"+sqlescape(v)+"')" + [points,xmin,xmax,ymin,ymax] +end + +def findconnect(id,nodesused,lookfor,toreverse,baselong,basey,masterscale) + # get all segments with 'id' as a point + # (to look for both node_a and node_b, UNION is faster than node_a=id OR node_b=id)! + sql=<<-EOF + SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,cn1.id AS id1, + cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid + FROM current_nodes AS cn1, + current_nodes AS cn2, + current_segments AS cs + LEFT OUTER JOIN current_way_nodes ON segment_id=cs.id + WHERE segment_id IS NULL + AND cs.visible=1 + AND cn1.id=node_a AND cn1.visible=1 + AND cn2.id=node_b AND cn2.visible=1 + AND node_a=#{id} + UNION + SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,cn1.id AS id1, + cn2.latitude AS lat2,cn2.longitude AS lon2,cn2.id AS id2, cs.id AS segid + FROM current_nodes AS cn1, + current_nodes AS cn2, + current_segments AS cs + LEFT OUTER JOIN current_way_nodes ON segment_id=cs.id + WHERE segment_id IS NULL + AND cs.visible=1 + AND cn1.id=node_a AND cn1.visible=1 + AND cn2.id=node_b AND cn2.visible=1 + AND node_b=#{id} + EOF + connectlist=ActiveRecord::Base.connection.select_all sql + + if lookfor=='b' then tocol='id1'; tolat='lat1'; tolon='lon1'; fromcol='id2'; fromlat='lat2'; fromlon='lon2' + else tocol='id2'; tolat='lat2'; tolon='lon2'; fromcol='id1'; fromlat='lat1'; fromlon='lon1' + end + + # 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 - - 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 + } - [originalway,way,renumberednodes,numberedsegments,xmin,xmax,ymin,ymax] - end - - # ----- deleteway (user token, way) - # returns way ID only - - def deleteway(args) - usertoken,way=args - uid=getuserid(usertoken); if !uid then return end - 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_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) - - 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, - current_segments AS cs, - #{db_uqs} AS us - WHERE (cn.id=cs.node_a OR cn.id=cs.node_b) - AND cs.id=us.segment_id - EOF - ActiveRecord::Base.connection.insert(sql) - - sql=<<-EOF - UPDATE current_nodes AS cn, - current_segments AS cs, - #{db_uqs} AS us - SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid} - WHERE (cn.id=cs.node_a OR cn.id=cs.node_b) - AND cs.id=us.segment_id - EOF - ActiveRecord::Base.connection.update(sql) - - # - delete any otherwise unused segments - - 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) - - 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.execute("DROP TABLE #{db_uqs}") - - # - 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 - - # ==================================================================== - # 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 "+ - " 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 "+ - " ORDER BY sequence_id" + # 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 - def createuniquesegments(way,uqs_name) - sql=<<-EOF - CREATE TEMPORARY TABLE #{uqs_name} - SELECT a.segment_id - FROM (SELECT DISTINCT segment_id FROM current_way_segments - WHERE id = #{way}) a - LEFT JOIN current_way_segments b - ON b.segment_id = a.segment_id - AND b.id != #{way} - WHERE b.segment_id IS NULL - EOF - ActiveRecord::Base.connection.execute(sql) - end - - def sqlescape(a) - a.gsub("'","''").gsub(92.chr,92.chr+92.chr) - end +# ==================================================================== +# Support functions for remote calls - def tag2array(a) - tags={} - a.gsub(';;;','#%').split(';').each do |b| - b.gsub!('#%',';;;') - b.gsub!('===','#%') - k,v=b.split('=') - if k.nil? then k='' end - if v.nil? then v='' end - tags[k.gsub('#%','=')]=v.gsub('#%','=') - end - tags - end +def readwayquery(id) + ActiveRecord::Base.connection.select_all "SELECT n1.latitude AS lat1,n1.longitude AS long1,n1.id AS id1,n1.tags as tags1, "+ + " n2.latitude AS lat2,n2.longitude AS long2,n2.id AS id2,n2.tags as tags2,segment_id "+ + " FROM current_way_nodes,current_segments,current_nodes AS n1,current_nodes AS n2 "+ + " WHERE current_way_nodes.id=#{id} "+ + " AND segment_id=current_segments.id "+ + " AND current_segments.visible=1 "+ + " AND n1.id=node_a and n2.id=node_b "+ + " AND n1.visible=1 AND n2.visible=1 "+ + " ORDER BY sequence_id" +end - def array2tag(a) - str='' - a.each do |k,v| - if v=='' then next end - if v[0,6]=='(type ' then next end - if str!='' then str+=';' end - str+=k.gsub(';',';;;').gsub('=','===')+'='+v.gsub(';',';;;').gsub('=','===') - end - str - end - - 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}')") - else - return ActiveRecord::Base.connection.select_value("SELECT id FROM users WHERE active=1 AND timeout>NOW() AND token='#{token}'") - end - end - +def createuniquesegments(way,uqs_name,seglist) + # Finds segments which appear in (previous version of) this way and no other + sql=<<-EOF + CREATE TEMPORARY TABLE #{uqs_name} + SELECT a.segment_id + FROM (SELECT DISTINCT segment_id FROM current_way_nodes + WHERE id = #{way}) a + LEFT JOIN current_way_nodes b + ON b.segment_id = a.segment_id + AND b.id != #{way} + WHERE b.segment_id IS NULL + EOF + if (seglist!='') then sql+=" AND a.segment_id NOT IN (#{seglist})" end + ActiveRecord::Base.connection.execute(sql) +end +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 + EOF + ActiveRecord::Base.connection.execute(sql) +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 +def sqlescape(a) + a.gsub("'","''").gsub(92.chr,92.chr+92.chr) +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 +def tag2array(a) + tags={} + a.gsub(';;;','#%').split(';').each do |b| + b.gsub!('#%',';;;') + b.gsub!('===','#%') + k,v=b.split('=') + if k.nil? then k='' end + if v.nil? then v='' end + tags[k.gsub('#%','=')]=v.gsub('#%','=') + end + tags +end + +def array2tag(a) + str='' + a.each do |k,v| + if v=='' then next end + if v[0,6]=='(type ' then next end + if str!='' then str+=';' end + str+=k.gsub(';',';;;').gsub('=','===')+'='+v.gsub(';',';;;').gsub('=','===') + end + str +end + +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 end