class AmfController < ApplicationController
require 'stringio'
- # Still to do:
- # - all db interaction
- # - user authentication
- # - (also pass lat/lon through from view tab to edit tab)
-
# to log:
# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
+ # doesn't appear to set old versions of ways to invisible
+ # not sure about segments, either...
+
# ====================================================================
# Main AMF handler
# ====================================================================
# Remote calls
+ # ----- getpresets
+ # return presets,presetmenus and presetnames arrays
+
def getpresets
presets={}
presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]
[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 "+
ways=[]
waylist.each {|a|
ways<<a.wayid.to_i
-RAILS_DEFAULT_LOGGER.error("Found #{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
+ objname,wayid,baselong,basey,masterscale=args
wayid=wayid.to_i
points=[]
lastid=-1
xmin=999999; xmax=-999999
ymin=999999; ymax=-999999
-RAILS_DEFAULT_LOGGER.error("Looking for way #{wayid}")
- nodelist=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=#{wayid} "+
- " AND segment_id=current_segments.id "+
- " AND n1.id=node_a and n2.id=node_b "+
- " ORDER BY sequence_id"
- nodelist.each {|row|
- xs1=long2coord(row['long1'].to_f); ys1=lat2coord(row['lat1'].to_f)
- xs2=long2coord(row['long2'].to_f); ys2=lat2coord(row['lat2'].to_f)
+ 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
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'] }
-RAILS_DEFAULT_LOGGER.error("Way #{wayid} #{xmin},#{xmax},#{ymin},#{ymax}")
[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)
- # to do
+ usertoken,originalway,points,attributes,baselong,basey,masterscale=args
+ uid=getuserid(usertoken); if !uid then return end
+ db_uqs='uniq'+usertoken+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquesegments table name, typically 51 chars
+ db_now='@now'+usertoken+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)
- # to do
+ usertoken,way=args
+ uid=getuserid(usertoken); if !uid then return end
+ way=way.to_i
+
+ db_uqs='uniq'+usertoken+way.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquesegments table name, typically 51 chars
+ db_now='@now'+usertoken+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
- # need support functions here too:
- # database support functions (readwayquery, createuniquesegments)
- # tag2array, array2tag
- # getuserid
+ # ====================================================================
+ # 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!('#%',';')
+ a.gsub(';;;','#%').split(';').each do |b|
+ b.gsub!('#%',';;;')
+ b.gsub!('===','#%')
k,v=b.split('=')
- tags[k]=v
+ 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)
+ ActiveRecord::Base.connection.select_value("SELECT id FROM users WHERE token='#{token}' AND active=1 AND timeout>NOW()")
+ end
+
+
# ====================================================================
# AMF read subroutines
# ====================================================================
# Co-ordinate conversion
- def lat2coord(a)
- -(lat2y(a)-$basey)*$masterscale+250
+ def lat2coord(a,basey,masterscale)
+ -(lat2y(a)-basey)*masterscale+250
end
- def long2coord(a)
- (a-$baselong)*$masterscale+350
+ def long2coord(a,baselong,masterscale)
+ (a-baselong)*masterscale+350
end
def lat2y(a)
180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
end
- def coord2lat(a)
- y2lat((a-250)/-$masterscale+$basey)
+ def coord2lat(a,masterscale,basey)
+ y2lat((a-250)/-masterscale+basey)
end
- def coord2long(a)
- (a-350)/$masterscale+$baselong
+ def coord2long(a,masterscale,baselong)
+ (a-350)/masterscale+baselong
end
def y2lat(a)
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