class AmfController < ApplicationController
-=begin
require 'stringio'
-# 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 2004-2008
+ #
+ # All in/out parameters are floats unless explicitly stated.
+ # Note that in getway/getway_old, SWF object name and way id are
+ #Êidentical and one could probably be eliminated.
+ #
+ # 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
-
- 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))
- end
- end
-
- # ------------------
- # Write out response
-
- 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
-
- end
-
-
- # ====================================================================
- # 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)
- 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<<a.wayid.to_i
- }
- ways
- end
-
- # ----- getway (objectname, way, baselong, basey, masterscale)
- # returns objectname, array of co-ordinates, attributes,
- # xmin,xmax,ymin,ymax
-
- def getway(args)
- objname,wayid,baselong,basey,masterscale=args
- wayid=wayid.to_i
- points=[]
- lastid=-1
- xmin=999999; xmax=-999999
- ymin=999999; ymax=-999999
-
- 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)
- if (row['id1'].to_i!=lastid)
- points<<[xs1,ys1,row['id1'].to_i,0,tag2array(row['tags1']),0]
- end
- lastid=row['id2'].to_i
- points<<[xs2,ys2,row['id2'].to_i,1,tag2array(row['tags2']),row['segment_id'].to_i]
- xmin=[xmin,row['long1'].to_f,row['long2'].to_f].min
- xmax=[xmax,row['long1'].to_f,row['long2'].to_f].max
- ymin=[ymin,row['lat1'].to_f,row['lat2'].to_f].min
- ymax=[ymax,row['lat1'].to_f,row['lat2'].to_f].max
- }
-
- attributes={}
- attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM current_way_tags WHERE id=#{wayid}"
- attrlist.each {|a| attributes[a['k']]=a['v'] }
-
- [objname,points,attributes,xmin,xmax,ymin,ymax]
- end
-
- # ----- putway (user token, way, array of co-ordinates, array of attributes,
- # baselong, basey, masterscale)
- # returns current way ID, new way ID, hash of renumbered nodes,
- # xmin,xmax,ymin,ymax
-
- def putway(args)
- usertoken,originalway,points,attributes,baselong,basey,masterscale=args
- uid=getuserid(usertoken); if !uid then return end
- 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_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
-
- # -- 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
- }
- 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=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
-
- # -- 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}") }
-
- 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)
-
- # 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 nodes from uniquesegments (and not in modified way)
-
- 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})
- 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 AND cs.visible=1
- AND (cn.timestamp!=#{db_now} OR cn.user_id!=#{uid})
- 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}")
-
- # 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)+"')"
- 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"
- end
-
- def createuniquesegments(way,uqs_name)
- sql=<<-EOF
- CREATE TEMPORARY TABLE #{uqs_name}
- SELECT a.segment_id,COUNT(a.segment_id) AS ct
- FROM current_way_segments AS a, current_way_segments AS b
- WHERE a.segment_id=b.segment_id
- AND a.id=#{way}
- GROUP BY a.segment_id
- HAVING ct=1
- EOF
- ActiveRecord::Base.connection.execute(sql)
- end
-
-
- def sqlescape(a)
- a.gsub("'","''").gsub(92.chr,92.chr+92.chr)
- end
-
- def tag2array(a)
- tags={}
- a.gsub(';;;','#%').split(';').each do |b|
- b.gsub!('#%',';;;')
- b.gsub!('===','#%')
- k,v=b.split('=')
- 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)
- 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
-
-
-
- # ====================================================================
- # 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
+ req=StringIO.new(request.raw_post+0.chr) # Get POST data as request
+ # (cf http://www.ruby-forum.com/topic/122163)
+ req.read(2) # Skip version indicator and client ID
+ results={} # Results of each body
+ renumberednodes={} # Shared across repeated putways
+
+ # -------------
+ # Parse request
+
+ headers=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'; r=putway(args,renumberednodes)
+ renumberednodes=r[3]
+ results[index]=putdata(index,r)
+ 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
+ }
+ RAILS_DEFAULT_LOGGER.info(" Response: end")
+
+ end
+
+ private
+
+
+ # ====================================================================
+ # Remote calls
+
+ # ----- getpresets
+ # in: none
+ # does: reads tag preset menus, colours, and autocomplete config files
+ # out: [0] presets, [1] presetmenus, [2] presetnames,
+ # [3] colours, [4] casing, [5] areas, [6] autotags
+ # (all hashes)
+
+ def getpresets
+ RAILS_DEFAULT_LOGGER.info(" Message: getpresets")
+
+ # Read preset menus
+ presets={}
+ presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]; presetmenus['POI']=[]
+ presetnames={}; presetnames['point']={}; presetnames['way']={}; presetnames['POI']={}
+ presettype=''
+ presetcategory=''
+ # StringIO.open(txt) do |file|
+ File.open("#{RAILS_ROOT}/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
+
+ # Read colours/styling
+ colours={}; casing={}; areas={}
+ File.open("#{RAILS_ROOT}/config/potlatch/colours.txt") do |file|
+ file.each_line {|line|
+ t=line.chomp
+ if (t=~/(\w+)\s+([^\s]+)\s+([^\s]+)\s+([^\s]+)/) then
+ tag=$1
+ if ($2!='-') then colours[tag]=$2.hex end
+ if ($3!='-') then casing[tag]=$3.hex end
+ if ($4!='-') then areas[tag]=$4.hex end
+ end
+ }
+ end
+
+ # Read auto-complete
+ autotags={}; autotags['point']={}; autotags['way']={}; autotags['POI']={};
+ File.open("#{RAILS_ROOT}/config/potlatch/autocomplete.txt") do |file|
+ file.each_line {|line|
+ t=line.chomp
+ if (t=~/^(\w+)\/(\w+)\s+(.+)$/) then
+ tag=$1; type=$2; values=$3
+ if values=='-' then autotags[type][tag]=[]
+ else autotags[type][tag]=values.split(',').sort.reverse end
+ end
+ }
+ end
+
+ [presets,presetmenus,presetnames,colours,casing,areas,autotags]
+ end
+
+ # ----- whichways
+ # return array of ways in current bounding box
+
+ # in: [0] xmin, [1] ymin, [2] xmax, [3] ymax (bbox in degrees)
+ # [4] baselong (longitude of SWF map origin),
+ # [5] basey (projected latitude of SWF map origin),
+ # [6] masterscale (SWF map scale)
+ # does: finds all ways and POI nodes in bounding box
+ # at present, instead of using correct (=more complex) SQL to find
+ # corner-crossing ways, it simply enlarges the bounding box
+ # out: [0] array of way ids,
+ # [1] array of POIs
+ # (where each POI is an array containing:
+ # [0] id, [1] projected long, [2] projected lat, [3] hash of tags)
+
+ def whichways(args)
+ xmin = args[0].to_f-0.01
+ ymin = args[1].to_f-0.01
+ xmax = args[2].to_f+0.01
+ ymax = args[3].to_f+0.01
+ baselong = args[4]
+ basey = args[5]
+ masterscale = args[6]
+
+ RAILS_DEFAULT_LOGGER.info(" Message: whichways, bbox=#{xmin},#{ymin},#{xmax},#{ymax}")
+
+ waylist = ActiveRecord::Base.connection.select_all("SELECT DISTINCT current_way_nodes.id AS wayid"+
+ " FROM current_way_nodes,current_nodes,current_ways "+
+ " WHERE current_nodes.id=current_way_nodes.node_id "+
+ " AND current_nodes.visible=1 "+
+ " AND current_ways.id=current_way_nodes.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 IDs
+
+ 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_way_nodes cwn ON cwn.node_id=current_nodes.id "+
+ " WHERE "+OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")+
+ " AND cwn.id IS NULL "+
+ " AND current_nodes.visible=1")
+
+ 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
+
+ [ways,points]
+ end
+
+ # ----- whichways_deleted
+ # return array of deleted ways in current bounding box
+
+ # in: as whichways
+ # does: finds all deleted ways with a deleted node in bounding box
+ # out: [0] array of way ids
+
+ def whichways_deleted(args)
+ xmin = args[0].to_f-0.01
+ ymin = args[1].to_f-0.01
+ xmax = args[2].to_f+0.01
+ ymax = args[3].to_f+0.01
+ baselong = args[4]
+ basey = args[5]
+ masterscale = args[6]
+
+ sql=<<-EOF
+ SELECT DISTINCT current_ways.id
+ FROM current_nodes,way_nodes,current_ways
+ WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
+ AND way_nodes.node_id=current_nodes.id
+ AND way_nodes.id=current_ways.id
+ AND current_nodes.visible=0
+ AND current_ways.visible=0
+ EOF
+ waylist = ActiveRecord::Base.connection.select_all(sql)
+ ways = waylist.collect {|a| a['id'].to_i }
+ [ways]
+ end
+
+ # ----- getway
+ # in: [0] SWF object name,
+ # [1] way id, [2] baselong, [3] basey, [4] masterscale
+ # does: gets way and all nodes
+ # out: [0] SWF object name (unchanged),
+ # [1] array of points
+ # (where each point is an array containing
+ # [0] projected long, [1] projected lat, [2] node id,
+ # [3] null, [4] hash of node tags),
+ # [2] xmin, [3] xmax, [4] ymin, [5] ymax (unprojected bbox)
+
+ def getway(args)
+ objname,wayid,baselong,basey,masterscale=args
+ wayid = wayid.to_i
+ points = []
+ xmin = ymin = 999999
+ xmax = ymax = -999999
+
+ RAILS_DEFAULT_LOGGER.info(" Message: getway, id=#{wayid}")
+
+ readwayquery(wayid,true).each {|row|
+ points<<[long2coord(row['longitude'].to_f,baselong,masterscale),lat2coord(row['latitude'].to_f,basey,masterscale),row['id'].to_i,nil,tag2array(row['tags'])]
+ xmin = [xmin,row['longitude'].to_f].min
+ xmax = [xmax,row['longitude'].to_f].max
+ ymin = [ymin,row['latitude'].to_f].min
+ ymax = [ymax,row['latitude'].to_f].max
+ }
+
+ attributes={}
+ attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM current_way_tags WHERE id=#{wayid}"
+ attrlist.each {|a| attributes[a['k'].gsub(':','|')]=a['v'] }
+
+ [objname,points,attributes,xmin,xmax,ymin,ymax]
+ end
+
+ # ----- getway_old
+ # returns old version of way
+
+ # in: [0] SWF object name, [1] way id,
+ # [2] way version to get (or -1 for "last deleted version")
+ # [3] baselong, [4] basey, [5] masterscale
+ # does: gets old version of way and all constituent nodes
+ # for undelete, always uses the most recent version of each node
+ # (even if it's moved)
+ # for revert, uses the historic version of each node, but if that node is
+ # still visible and has been changed since, generates a new node id
+ # out: [0] 0 (code for success), [1] SWF object name,
+ # [2] array of points (as getway _except_ [3] is node.visible?, 0 or 1),
+ # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox),
+ # [8] way version
+
+ def getway_old(args)
+ RAILS_DEFAULT_LOGGER.info(" Message: getway_old (server is #{SERVER_URL})")
+ # if SERVER_URL=="www.openstreetmap.org" then return -1,"Revert is not currently enabled on the OpenStreetMap server." end
+
+ objname,wayid,version,baselong,basey,masterscale=args
+ wayid = wayid.to_i
+ version = version.to_i
+ xmin = ymin = 999999
+ xmax = ymax = -999999
+ points=[]
+ if version<0
+ historic=false
+ version=getlastversion(wayid,version)
+ else
+ historic=true
+ end
+ readwayquery_old(wayid,version,historic).each { |row|
+ points<<[long2coord(row['longitude'].to_f,baselong,masterscale),lat2coord(row['latitude'].to_f,basey,masterscale),row['id'].to_i,row['visible'].to_i,tag2array(row['tags'].to_s)]
+ xmin=[xmin,row['longitude'].to_f].min
+ xmax=[xmax,row['longitude'].to_f].max
+ ymin=[ymin,row['latitude' ].to_f].min
+ ymax=[ymax,row['latitude' ].to_f].max
+ }
+
+ # get tags from this version
+ attributes={}
+ attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM way_tags WHERE id=#{wayid} AND version=#{version}"
+ attrlist.each {|a| attributes[a['k'].gsub(':','|')]=a['v'] }
+ attributes['history']="Retrieved from v"+version.to_s
+
+ [0,objname,points,attributes,xmin,xmax,ymin,ymax,version]
+ end
+
+ # ----- getway_history
+ # find history of a way
+
+ # in: [0] way id
+ # does: finds history of a way
+ # out: [0] array of previous versions (where each is
+ # [0] version, [1] db timestamp (string),
+ # [2] visible 0 or 1,
+ # [3] username or 'anonymous' (string))
+
+ def getway_history(args)
+ wayid=args[0]
+ history=[]
+ sql=<<-EOF
+ SELECT version,timestamp,visible,display_name,data_public
+ FROM ways,users
+ WHERE ways.id=#{wayid}
+ AND ways.user_id=users.id
+ AND ways.visible=1
+ ORDER BY version DESC
+ EOF
+ histlist=ActiveRecord::Base.connection.select_all(sql)
+ histlist.each { |row|
+ if row['data_public'].to_i==1 then user=row['display_name'] else user='anonymous' end
+ history<<[row['version'],row['timestamp'],row['visible'],user]
+ }
+ [history]
+ end
+
+ # ----- putway
+ # saves a way to the database
+
+ # in: [0] user token (string),
+ # [1] original way id (may be negative),
+ # [2] array of points (as getway/getway_old),
+ # [3] hash of way tags,
+ # [4] original way version (0 if not a reverted/undeleted way),
+ # [5] baselong, [6] basey, [7] masterscale
+ # does: saves way to the database
+ # all constituent nodes are created/updated as necessary
+ # (or deleted if they were in the old version and are otherwise unused)
+ # out: [0] 0 (code for success), [1] original way id (unchanged),
+ # [2] new way id, [3] hash of renumbered nodes (old id=>new id),
+ # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox)
+
+ def putway(args,renumberednodes)
+ RAILS_DEFAULT_LOGGER.info(" putway started")
+ usertoken,originalway,points,attributes,oldversion,baselong,basey,masterscale=args
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be saved." end
+
+ RAILS_DEFAULT_LOGGER.info(" putway authenticated happily")
+ db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars
+ db_now='@now'+(rand*100).to_i.to_s+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars
+ ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()")
+ originalway=originalway.to_i
+ oldversion=oldversion.to_i
+
+ RAILS_DEFAULT_LOGGER.info(" Message: putway, id=#{originalway}")
+
+ # -- Temporary check for null IDs
+
+ points.each do |a|
+ if a[2]==0 or a[2].nil? then return -2,"Server error - node with id 0 found in way #{originalway}." end
+ end
+
+ # -- 3. read original way into memory
+
+ xc={}; yc={}; tagc={}; vc={}
+ if originalway>0
+ way=originalway
+ if oldversion==0 then r=readwayquery(way,false)
+ else r=readwayquery_old(way,oldversion,true) end
+ r.each { |row|
+ id=row['id'].to_i
+ if (id>0) then
+ xc[id]=row['longitude'].to_f
+ yc[id]=row['latitude' ].to_f
+ tagc[id]=row['tags']
+ vc[id]=row['visible'].to_i
+ end
+ }
+ ActiveRecord::Base.connection.update("UPDATE current_ways SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id=#{way}")
+ else
+ way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)")
+ end
+
+ # -- 4. get version by inserting new row into ways
+
+ version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)")
+
+ # -- 5. compare nodes and update xmin,xmax,ymin,ymax
+
+ xmin=ymin= 999999
+ xmax=ymax=-999999
+ insertsql=''
+ nodelist=[]
+
+ points.each_index do |i|
+ xs=coord2long(points[i][0],masterscale,baselong)
+ ys=coord2lat(points[i][1],masterscale,basey)
+ xmin=[xs,xmin].min; xmax=[xs,xmax].max
+ ymin=[ys,ymin].min; ymax=[ys,ymax].max
+ node=points[i][2].to_i
+ tagstr=array2tag(points[i][4])
+ tagsql="'"+sqlescape(tagstr)+"'"
+ lat=(ys * 10000000).round
+ long=(xs * 10000000).round
+ tile=QuadTile.tile_for_point(ys, xs)
+
+ # compare node
+ if node<0
+ # new node - create
+ if renumberednodes[node.to_s].nil?
+ newnode=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes ( latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES ( #{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})")
+ ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newnode},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})")
+ points[i][2]=newnode
+ nodelist.push(newnode)
+ renumberednodes[node.to_s]=newnode.to_s
+ else
+ points[i][2]=renumberednodes[node.to_s].to_i
+ end
+
+ elsif xc.has_key?(node)
+ nodelist.push(node)
+ # old node from original way - update
+ if ((xs/0.0000001).round!=(xc[node]/0.0000001).round or (ys/0.0000001).round!=(yc[node]/0.0000001).round or tagstr!=tagc[node] or vc[node]==0)
+ ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{node},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})")
+ ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},tags=#{tagsql},visible=1,tile=#{tile} WHERE id=#{node}")
+ end
+ else
+ # old node, created in another way and now added to this way
+ end
+ end
+
+
+ # -- 6a. delete any nodes not in modified way
+
+ createuniquenodes(way,db_uqn,nodelist) # nodes which appear in this way but no other
+
+ sql=<<-EOF
+ INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile)
+ SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile
+ FROM current_nodes AS cn,#{db_uqn}
+ WHERE cn.id=node_id
+ EOF
+ ActiveRecord::Base.connection.insert(sql)
+
+ sql=<<-EOF
+ UPDATE current_nodes AS cn, #{db_uqn}
+ SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid}
+ WHERE cn.id=node_id
+ EOF
+ ActiveRecord::Base.connection.update(sql)
+
+ deleteuniquenoderelations(db_uqn,uid,db_now)
+ ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}")
+
+ # 6b. insert new version of route into way_nodes
+
+ insertsql =''
+ currentsql=''
+ sequence =1
+ points.each do |p|
+ if insertsql !='' then insertsql +=',' end
+ if currentsql!='' then currentsql+=',' end
+ insertsql +="(#{way},#{p[2]},#{sequence},#{version})"
+ currentsql+="(#{way},#{p[2]},#{sequence})"
+ sequence +=1
+ end
+
+ ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}");
+ ActiveRecord::Base.connection.insert( "INSERT INTO way_nodes (id,node_id,sequence_id,version) VALUES #{insertsql}");
+ ActiveRecord::Base.connection.insert( "INSERT INTO current_way_nodes (id,node_id,sequence_id ) VALUES #{currentsql}");
+
+ # -- 7. insert new way tags
+
+ insertsql =''
+ currentsql=''
+ attributes.each do |k,v|
+ if v=='' or v.nil? then next end
+ if v[0,6]=='(type ' then next end
+ if insertsql !='' then insertsql +=',' end
+ if currentsql!='' then currentsql+=',' end
+ insertsql +="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"',#{version})"
+ currentsql+="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"')"
+ end
+
+ ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}")
+ if (insertsql !='') then ActiveRecord::Base.connection.insert("INSERT INTO way_tags (id,k,v,version) VALUES #{insertsql}" ) end
+ if (currentsql!='') then ActiveRecord::Base.connection.insert("INSERT INTO current_way_tags (id,k,v) VALUES #{currentsql}") end
+
+ [0,originalway,way,renumberednodes,xmin,xmax,ymin,ymax]
+ end
+
+ # ----- putpoi
+ # save POI to the database
+
+ # in: [0] user token (string),
+ # [1] original node id (may be negative),
+ # [2] projected longitude, [3] projected latitude,
+ # [4] hash of tags, [5] visible (0 to delete, 1 otherwise),
+ # [6] baselong, [7] basey, [8] masterscale
+ # does: saves POI node to the database
+ # refuses save if the node has since become part of a way
+ # out: [0] 0 (success), [1] original node id (unchanged),
+ # [2] new node id
+
+ def putpoi(args)
+ usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
+
+ db_now='@now'+(rand*100).to_i.to_s+uid.to_s+id.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars
+ ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()")
+
+ id=id.to_i
+ visible=visible.to_i
+ if visible==0 then
+ # if deleting, check node hasn't become part of a way
+ inway=ActiveRecord::Base.connection.select_one("SELECT cw.id FROM current_ways cw,current_way_nodes cwn WHERE cw.id=cwn.id AND cw.visible=1 AND cwn.node_id=#{id} LIMIT 1")
+ unless inway.nil? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end
+ deleteitemrelations(id,'node',uid,db_now)
+ end
+
+ x=coord2long(x.to_f,masterscale,baselong)
+ y=coord2lat(y.to_f,masterscale,basey)
+ tagsql="'"+sqlescape(array2tag(tags))+"'"
+ lat=(y * 10000000).round
+ long=(x * 10000000).round
+ tile=QuadTile.tile_for_point(y, x)
+
+ if (id>0) then
+ ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{id},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})");
+ ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},visible=#{visible},tags=#{tagsql},tile=#{tile} WHERE id=#{id}");
+ newid=id
+ else
+ newid=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes (latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})");
+ ActiveRecord::Base.connection.update("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newid},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})");
+ end
+ [0,id,newid]
+ end
+
+ # ----- getpoi
+ # read POI from database
+ # (only called on revert: POIs are usually read by whichways)
+
+ # in: [0] node id, [1] baselong, [2] basey, [3] masterscale
+ # does: reads POI
+ # out: [0] id (unchanged), [1] projected long, [2] projected lat,
+ # [3] hash of tags
+
+ def getpoi(args)
+ 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
+ # delete way and constituent nodes from database
+
+ # in: [0] user token (string), [1] way id
+ # does: deletes way from db and any constituent nodes not used elsewhere
+ # also removes ways/nodes from any relations they're in
+ # out: [0] 0 (success), [1] way id (unchanged)
+
+ def deleteway(args)
+ usertoken,way=args
+
+ RAILS_DEFAULT_LOGGER.info(" Message: deleteway, id=#{way}")
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be deleted." end
+
+ way=way.to_i
+ db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars
+ db_now='@now'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars
+ ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()")
+
+ # - delete any otherwise unused nodes
+
+ createuniquenodes(way,db_uqn,[])
+
+ # unless (preserve.empty?) then
+ # ActiveRecord::Base.connection.execute("DELETE FROM #{db_uqn} WHERE node_id IN ("+preserve.join(',')+")")
+ # end
+
+ sql=<<-EOF
+ INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile)
+ SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile
+ FROM current_nodes AS cn,#{db_uqn}
+ WHERE cn.id=node_id
+ EOF
+ ActiveRecord::Base.connection.insert(sql)
+
+ sql=<<-EOF
+ UPDATE current_nodes AS cn, #{db_uqn}
+ SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid}
+ WHERE cn.id=node_id
+ EOF
+ ActiveRecord::Base.connection.update(sql)
+
+ deleteuniquenoderelations(db_uqn,uid,db_now)
+ ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}")
+
+ # - delete way
+
+ ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},0)")
+ ActiveRecord::Base.connection.update("UPDATE current_ways SET user_id=#{uid},timestamp=#{db_now},visible=0 WHERE id=#{way}")
+ ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}")
+ ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}")
+ deleteitemrelations(way,'way',uid,db_now)
+ [0,way]
+ end
+
+
+
+ # ====================================================================
+ # Support functions for remote calls
+
+ def readwayquery(id,insistonvisible)
+ sql=<<-EOF
+ SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags,visible
+ FROM current_way_nodes,current_nodes
+ WHERE current_way_nodes.id=#{id}
+ AND current_way_nodes.node_id=current_nodes.id
+ EOF
+ if insistonvisible then sql+=" AND current_nodes.visible=1 " end
+ sql+=" ORDER BY sequence_id"
+ ActiveRecord::Base.connection.select_all(sql)
+ end
+
+ 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
+ # - if it's in another way now, generate a new id
+ # - if it's not in another way, use the old ID
+ if historic then
+ rows.each_index do |i|
+ sql=<<-EOF
+ SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags,cwn.id AS currentway
+ FROM nodes n
+ LEFT JOIN current_way_nodes cwn
+ ON cwn.node_id=n.id
+ WHERE n.id=#{rows[i]['id']}
+ AND n.timestamp<="#{waytime}"
+ AND cwn.id!=#{id}
+ ORDER BY n.timestamp DESC
+ LIMIT 1
+ EOF
+ row=ActiveRecord::Base.connection.select_one(sql)
+ unless row.nil? then
+ nx=row['longitude'].to_f
+ ny=row['latitude'].to_f
+ if (row['currentway'] && (nx!=rows[i]['longitude'].to_f or ny!=rows[i]['latitude'].to_f or row['tags']!=rows[i]['tags'])) then rows[i]['id']=-1 end
+ rows[i]['longitude']=nx
+ rows[i]['latitude' ]=ny
+ rows[i]['tags' ]=row['tags']
+ end
+ end
+ end
+ rows
+ end
+
+ def createuniquenodes(way,uqn_name,nodelist)
+ # Find nodes which appear in this way but no others
+ sql=<<-EOF
+ CREATE TEMPORARY TABLE #{uqn_name}
+ SELECT a.node_id
+ FROM (SELECT DISTINCT node_id FROM current_way_nodes
+ WHERE id=#{way}) a
+ LEFT JOIN current_way_nodes b
+ ON b.node_id=a.node_id
+ AND b.id!=#{way}
+ WHERE b.node_id IS NULL
+ EOF
+ unless nodelist.empty? then
+ sql+="AND a.node_id NOT IN ("+nodelist.join(',')+")"
+ end
+ ActiveRecord::Base.connection.execute(sql)
+ end
+
+
+
+ # ====================================================================
+ # Relations handling
+ # deleteuniquenoderelations(uqn_name,uid,db_now)
+ # deleteitemrelations(way|node,'way'|'node',uid,db_now)
+
+ def deleteuniquenoderelations(uqn_name,uid,db_now)
+ 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
+
+ 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)
+
+ 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
projects / rails.git / blobdiff