+# amf_controller is a semi-standalone API for Flash clients, particularly
+# 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).
+#
+# Helper functions are in /lib/potlatch.
+#
+# Author:: editions Systeme D / Richard Fairhurst 2004-2008
+# Licence:: public domain.
+#
+# == General structure
+#
+# Apart from the talk method (which distributes the requests from the
+# AMF message), each method generally takes arguments in the order they were
+# sent by the Potlatch SWF. Do not assume typing has been preserved. Methods
+# all return an array to the SWF.
+#
+# == Debugging
+#
+# Any method that returns a status code (0 for ok) can also send:
+# return(-1,"message") <-- just puts up a dialogue
+# return(-2,"message") <-- also asks the user to e-mail me
+#
+# To write to the Rails log, use RAILS_DEFAULT_LOGGER.info("message").
+#
+# == To do
+#
+# - Check authentication
+# - Check the right things are being written to the database!
+
class AmfController < ApplicationController
require 'stringio'
+ include Potlatch
+
session :off
before_filter :check_write_availability
- # AMF controller for Potlatch
- # ---------------------------
- # All interaction between Potlatch (as a .SWF application) and the
- # OSM database takes place using this controller. Messages are
- # encoded in the Actionscript Message Format (AMF).
- #
- # Public domain. Set your tab width to 4 to read this document. :)
- # editions Systeme D / Richard Fairhurst 2004-2007
+ # Main AMF handler: processes the raw AMF string (using AMF library) and
+ # calls each action (private method) accordingly.
- # 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]}")
+ def talk
+ 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
+ renumberedways={} # Shared across repeated putways
+
+ # Parse request
+
+ headers=AMF.getint(req) # Read number of headers
+
+ headers.times do # Read each header
+ name=AMF.getstring(req) # |
+ req.getc # | skip boolean
+ value=AMF.getvalue(req) # |
+ header["name"]=value # |
+ end
- # ====================================================================
- # Main AMF handler
+ bodies=AMF.getint(req) # Read number of bodies
+ bodies.times do # Read each body
+ message=AMF.getstring(req) # | get message name
+ index=AMF.getstring(req) # | get index in response sequence
+ bytes=AMF.getlong(req) # | get total size in bytes
+ args=AMF.getvalue(req) # | get response (probably an array)
+
+ case message
+ when 'getpresets'; results[index]=AMF.putdata(index,getpresets())
+ when 'whichways'; results[index]=AMF.putdata(index,whichways(*args))
+ when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args))
+ when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i))
+ when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i))
+ when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1].to_i))
+ when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i))
+ when 'putway'; r=putway(renumberednodes,*args)
+ renumberednodes=r[3]
+ if r[1] != r[2]
+ renumberedways[r[1]] = r[2]
+ end
+ results[index]=AMF.putdata(index,r)
+ when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
+ when 'deleteway'; results[index]=AMF.putdata(index,deleteway(args[0],args[1].to_i))
+ when 'putpoi'; results[index]=AMF.putdata(index,putpoi(*args))
+ when 'getpoi'; results[index]=AMF.putdata(index,getpoi(args[0].to_i))
+ end
+ end
- # ---- talk process AMF request
+ # Write out response
- def talk
- 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)
+ 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
+ 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
- # return presets,presetmenus and presetnames arrays
-
- 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+)\t+([^\t]+)\t+([^\t]+)\t+([^\t]+)/) 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
- [presets,presetmenus,presetnames,colours,casing,areas]
- end
+ # Return presets (default tags, localisation etc.):
+ # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
- # ----- 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
- 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]
+ def getpresets() #:doc:
+ return POTLATCH_PRESETS
end
- # ----- whichways_deleted(left,bottom,right,top)
- # return array of deleted ways in current bounding box
-
- 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]
+ # Find all the ways, POI nodes (i.e. not part of ways), and relations
+ # in a given bounding box. Nodes are returned in full; ways and relations
+ # are IDs only.
- 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 (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 = []
- xmin = ymin = 999999
- xmax = ymax = -999999
-
- RAILS_DEFAULT_LOGGER.info(" Message: getway, id=#{wayid}")
-
- readwayquery(wayid).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 (objectname, way, version, baselong, basey, masterscale)
- # returns old version of way
+ def whichways(xmin,ymin,xmax,ymax) #:doc:
+ xmin-=0.01; ymin-=0.01
+ xmax+=0.01; ymax+=0.01
- 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)
+ if POTLATCH_USE_SQL then
+ way_ids=sql_find_way_ids_in_area(xmin,ymin,xmax,ymax)
+ points=sql_find_pois_in_area(xmin,ymin,xmax,ymax)
+ relation_ids=sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
else
- historic=true
+ # find the way ids in an area
+ nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => "current_nodes.visible = 1", :include => :ways)
+ way_ids = nodes_in_area.collect { |node| node.way_ids }.flatten.uniq
+
+ # find the node ids in an area that aren't part of ways
+ nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
+ points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags_as_hash] }
+
+ # find the relations used by those nodes and ways
+ relations = nodes_in_area.collect { |node| node.containing_relations.visible }.flatten +
+ way_ids.collect { |id| Way.find(id).containing_relations.visible }.flatten
+ relation_ids = relations.collect { |relation| relation.id }.uniq
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]
+ [way_ids,points,relation_ids]
end
- # ----- getway_history (way)
- # returns array of previous versions (version,timestamp,visible,user)
- # should also show 'created_by'
+ # Find deleted ways in current bounding box (similar to whichways, but ways
+ # with a deleted node only - not POIs or relations).
- def getway_history(wayid)
- 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'] then user=row['display_name'] else user='anonymous' end
- history<<[row['version'],row['timestamp'],row['visible'],user]
- }
- [history]
+ def whichways_deleted(xmin,ymin,xmax,ymax) #:doc:
+ xmin-=0.01; ymin-=0.01
+ xmax+=0.01; ymax+=0.01
+
+ nodes_in_area = Node.find_by_area(ymin, xmin, ymax,xmax, :conditions => "current_nodes.visible=0 AND current_ways.visible=0", :include => :ways_via_history )
+ way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
+ [way_ids]
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,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}")
+ # Get a way including nodes and tags.
+ # Returns 0 (success), a Potlatch-style array of points, and a hash of tags.
- # -- 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
+ def getway(wayid) #:doc:
+ if POTLATCH_USE_SQL then
+ points=sql_get_nodes_in_way(wayid)
+ tags=sql_get_tags_in_way(wayid)
+ else
+ # Ideally we would do ":include => :nodes" here but if we do that
+ # then rails only seems to return the first copy of a node when a
+ # way includes a node more than once
+ points = []
+ way = Way.find(wayid)
+ way.nodes.each do |node|
+ points << [node.lon, node.lat, node.id, nil, node.tags_as_hash]
+ end
+ tags=way.tags
end
+ [wayid,points,tags]
+ end
- # -- 3. read original way into memory
-
- xc={}; yc={}; tagc={}; vc={}
- if originalway>0
- way=originalway
- if oldversion==0
- readwayquery(way).each { |row|
- id=row['id'].to_i
- xc[id]=row['longitude'].to_f
- yc[id]=row['latitude' ].to_f
- tagc[id]=row['tags']
- vc[id]=1
- }
- else
- readwayquery_old(way,oldversion,true).each { |row|
- id=row['id'].to_i
- if (id>0) then
- xc[id]=row['longitude'].to_f
- yc[id]=row['latitude' ].to_f
- tagc[id]=row['tags']
- vc[id]=row['visible'].to_i
- end
- }
- end
- ActiveRecord::Base.connection.update("UPDATE current_ways SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id=#{way}")
- else
- way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)")
- end
-
- # -- 4. get version by inserting new row into ways
-
- version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)")
-
- # -- 5. compare nodes and update xmin,xmax,ymin,ymax
-
- xmin=ymin= 999999
- xmax=ymax=-999999
- insertsql=''
- 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
+ # Get an old version of a way, and all constituent nodes.
+ #
+ # For undelete (version=0), always uses the most recent version of each node,
+ # even if it's moved. For revert (version=1+), uses the node in existence
+ # at the time, generating a new id if it's still visible and has been moved/
+ # retagged.
- elsif xc.has_key?(node)
- nodelist.push(node)
- # old node from original way - update
- if (xs!=xc[node] or (ys/0.0000001).round!=(yc[node]/0.0000001).round or tagstr!=tagc[node] or vc[node]==0)
- ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{node},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})")
- ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},tags=#{tagsql},visible=1,tile=#{tile} WHERE id=#{node}")
- end
- else
- # old node, created in another way and now added to this way
- end
- end
-
-
- # -- 6a. delete any nodes not in modified way
-
- createuniquenodes(way,db_uqn,nodelist) # nodes which appear in this way but no other
-
- sql=<<-EOF
- INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile)
- SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile
- FROM current_nodes AS cn,#{db_uqn}
- WHERE cn.id=node_id
- EOF
- ActiveRecord::Base.connection.insert(sql)
-
- sql=<<-EOF
- UPDATE current_nodes AS cn, #{db_uqn}
- SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid}
- WHERE cn.id=node_id
- EOF
- ActiveRecord::Base.connection.update(sql)
-
- deleteuniquenoderelations(db_uqn,uid,db_now)
- ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqn}")
-
- # 6b. insert new version of route into way_nodes
-
- insertsql =''
- currentsql=''
- sequence =1
- points.each do |p|
- if insertsql !='' then insertsql +=',' end
- if currentsql!='' then currentsql+=',' end
- insertsql +="(#{way},#{p[2]},#{sequence},#{version})"
- currentsql+="(#{way},#{p[2]},#{sequence})"
- sequence +=1
- end
-
- ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}");
- ActiveRecord::Base.connection.insert( "INSERT INTO way_nodes (id,node_id,sequence_id,version) VALUES #{insertsql}");
- ActiveRecord::Base.connection.insert( "INSERT INTO current_way_nodes (id,node_id,sequence_id ) VALUES #{currentsql}");
-
- # -- 7. insert new way tags
-
- insertsql =''
- currentsql=''
- attributes.each do |k,v|
- if v=='' or v.nil? then next end
- if v[0,6]=='(type ' then next end
- if insertsql !='' then insertsql +=',' end
- if currentsql!='' then currentsql+=',' end
- insertsql +="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"',#{version})"
- currentsql+="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"')"
- end
-
- ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}")
- if (insertsql !='') then ActiveRecord::Base.connection.insert("INSERT INTO way_tags (id,k,v,version) VALUES #{insertsql}" ) end
- if (currentsql!='') then ActiveRecord::Base.connection.insert("INSERT INTO current_way_tags (id,k,v) VALUES #{currentsql}") end
-
- [0,originalway,way,renumberednodes,xmin,xmax,ymin,ymax]
+ def getway_old(id,version) #:doc:
+ if version<0
+ old_way = OldWay.find(:first, :conditions => ['visible=1 AND id=?', id], :order => 'version DESC')
+ points = old_way.get_nodes_undelete
+ else
+ old_way = OldWay.find(:first, :conditions => ['id=? AND version=?', id, version])
+ points = old_way.get_nodes_revert
+ end
+ old_way.tags['history']="Retrieved from v#{old_way.version}"
+ [0,id,points,old_way.tags,old_way.version]
end
+
+ # Find history of a way. Returns an array of previous versions.
- # ----- putpoi (user token, id, x,y,tag array,visible,baselong,basey,masterscale)
- # returns current id, new id
- # if new: add new row to current_nodes and nodes
- # if old: add new row to nodes, update current_nodes
-
- def putpoi(args)
- usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args
- uid=getuserid(usertoken)
- if !uid then return -1,"You are not logged in, so the point could not be saved." end
-
- db_now='@now'+(rand*100).to_i.to_s+uid.to_s+id.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars
- ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()")
-
- id=id.to_i
- visible=visible.to_i
- if visible==0 then
- # if deleting, check node hasn't become part of a way
- inway=ActiveRecord::Base.connection.select_one("SELECT cw.id FROM current_ways cw,current_way_nodes cwn WHERE cw.id=cwn.id AND cw.visible=1 AND cwn.node_id=#{id} LIMIT 1")
- unless inway.nil? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end
- deleteitemrelations(id,'node',uid,db_now)
+ def getway_history(wayid) #:doc:
+ history=[]
+ way=Way.find(wayid)
+ way.old_ways.each do |old_way|
+ if old_way.user.data_public then user=old_way.user.display_name else user='anonymous' end
+ history<<[old_way.version,old_way.timestamp.strftime("%d %b %Y, %H:%M"),old_way.visible ? 1 : 0,user]
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]
+ [history]
end
- # ----- getpoi (id,baselong,basey,masterscale)
- # returns id,x,y,tag array
+ # Get a relation with all tags and members.
+ # Returns:
+ # 0. relation id,
+ # 1. hash of tags,
+ # 2. list of members.
- 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'])]
+ def getrelation(relid) #:doc:
+ rel = Relation.find(relid)
+ [relid,rel.tags,rel.members]
end
- # ----- deleteway (user token, way, nodes to keep)
- # returns way ID only
+ # Save a relation.
+ # Returns
+ # 0. 0 (success),
+ # 1. original relation id (unchanged),
+ # 2. new relation id.
- def deleteway(args)
- usertoken,way=args
+ def putrelation(renumberednodes, renumberedways, usertoken,relid,tags,members,visible) #:doc:
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
- 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
+ relid = relid.to_i
+ visible = visible.to_i
- way=way.to_i
- db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars
- db_now='@now'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars
- ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()")
-
- # - delete any otherwise unused nodes
-
- createuniquenodes(way,db_uqn,[])
-
-# unless (preserve.empty?) then
-# ActiveRecord::Base.connection.execute("DELETE FROM #{db_uqn} WHERE node_id IN ("+preserve.join(',')+")")
-# end
-
- sql=<<-EOF
- INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile)
- SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile
- FROM current_nodes AS cn,#{db_uqn}
- WHERE cn.id=node_id
- EOF
- ActiveRecord::Base.connection.insert(sql)
-
- sql=<<-EOF
- UPDATE current_nodes AS cn, #{db_uqn}
- SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid}
- WHERE cn.id=node_id
- EOF
- ActiveRecord::Base.connection.update(sql)
-
- deleteuniquenoderelations(db_uqn,uid,db_now)
- ActiveRecord::Base.connection.execute("DROP TABLE #{db_uqn}")
-
- # - delete way
-
- 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
+ # create a new relation, or find the existing one
+ if relid <= 0
+ rel = Relation.new
+ else
+ rel = Relation.find(relid)
+ end
+ # check the members are all positive, and correctly type
+ typedmembers = []
+ members.each do |m|
+ mid = m[1].to_i
+ if mid < 0
+ mid = renumberednodes[mid] if m[0] == 'node'
+ mid = renumberedways[mid] if m[0] == 'way'
+ if mid < 0
+ return -2, "Negative ID unresolved"
+ end
+ end
+ typedmembers << [m[0], mid, m[2]]
+ end
+ # assign new contents
+ rel.members = typedmembers
+ rel.tags = tags
+ rel.visible = visible
+ rel.user_id = uid
-# ====================================================================
-# Support functions for remote calls
+ # check it then save it
+ # BUG: the following is commented out because it always fails on my
+ # install. I think it's a Rails bug.
-def readwayquery(id)
- ActiveRecord::Base.connection.select_all "SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags "+
- " FROM current_way_nodes,current_nodes "+
- " WHERE current_way_nodes.id=#{id} "+
- " AND current_way_nodes.node_id=current_nodes.id "+
- " AND current_nodes.visible=1 "+
- " ORDER BY sequence_id"
-end
+ #if !rel.preconditions_ok?
+ # return -2, "Relation preconditions failed"
+ #else
+ rel.save_with_history!
+ #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
+ [0,relid,rel.id]
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
+ # Save a way to the database, including all nodes. Any nodes in the previous
+ # version and no longer used are deleted.
+ #
+ # Returns:
+ # 0. '0' (code for success),
+ # 1. original way id (unchanged),
+ # 2. new way id,
+ # 3. hash of renumbered nodes (old id=>new id)
+ def putway(renumberednodes,usertoken,originalway,points,attributes) #:doc:
+ # -- Initialise and carry out checks
+
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be saved." end
+ originalway=originalway.to_i
-# ====================================================================
-# Relations handling
-# deleteuniquenoderelations(uqn_name,uid,db_now)
-# deleteitemrelations(way|node,'way'|'node',uid,db_now)
+ 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
+ if a[1]==90 then return -2,"Server error - node with lat -90 found in way #{originalway}." end
+ end
-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
+ if points.length<2 then return -2,"Server error - way is only #{points.length} points long." end
- relnodes=ActiveRecord::Base.connection.select_all(sql)
- relnodes.each do |a|
- removefromrelation(a['node_id'],'node',a['id'],uid,db_now)
- end
-end
+ # -- Get unique nodes
-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)
+ if originalway<0
+ way=Way.new
+ uniques=[]
+ else
+ way=Way.find(originalway)
+ uniques=way.unshared_node_ids
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)
+ # -- Compare nodes and save changes to any that have changed
+
+ nodes=[]
+
+ points.each do |n|
+ lon=n[0].to_f
+ lat=n[1].to_f
+ id =n[2].to_i
+ savenode=false
+ if renumberednodes[id]
+ id=renumberednodes[id]
+ elsif id<0
+ # Create new node
+ node=Node.new
+ savenode=true
+ else
+ node=Node.find(id)
+ if (!fpcomp(lat,node.lat) or !fpcomp(lon,node.lon) or \
+ Tags.join(n[4])!=node.tags or node.visible==0)
+ savenode=true
+ end
+ end
+ if savenode
+ node.user_id=uid
+ node.lat=lat; node.lon=lon
+ node.tags=Tags.join(n[4])
+ node.visible=true
+ node.save_with_history!
+ if id!=node.id
+ renumberednodes[id]=node.id
+ id=node.id
+ end
+ end
+ uniques=uniques-[id]
+ nodes.push(id)
+ end
- 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)
+ # -- Delete any unique nodes
- 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
+ uniques.each do |n|
+ deleteitemrelations(n,'node')
+ node=Node.find(n)
+ node.user_id=uid
+ node.visible=false
+ node.save_with_history!
+ end
+ # -- Save revised way
-def sqlescape(a)
- a.gsub(/[\000-\037]/,"").gsub("'","''").gsub(92.chr) {92.chr+92.chr}
-end
+ way.tags=attributes
+ way.nds=nodes
+ way.user_id=uid
+ way.visible=true
+ way.save_with_history!
-def tag2array(a)
- tags={}
- Tags.split(a) do |k, v|
- tags[k.gsub(':','|')]=v
+ [0,originalway,way.id,renumberednodes]
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
+ # Save POI to the database.
+ # Refuses save if the node has since become part of a way.
+ # Returns:
+ # 0. 0 (success),
+ # 1. original node id (unchanged),
+ # 2. new node id.
+
+ def putpoi(usertoken,id,lon,lat,tags,visible) #:doc:
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
+
+ id=id.to_i
+ visible=(visible.to_i==1)
+
+ if (id>0) then
+ node=Node.find(id)
+ if !visible then
+ unless node.ways.empty? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end
+ deleteitemrelations(id,'node')
+ end
+ else
+ node=Node.new
+ end
-def getuserid(token)
- if (token =~ /^(.+)\+(.+)$/) then
- user = User.authenticate(:username => $1, :password => $2)
- else
- user = User.authenticate(:token => token)
+ node.user_id = uid
+ node.latitude = (lat*10000000).round
+ node.longitude = (lon*10000000).round
+ node.tags = Tags.join(tags)
+ node.visible=visible
+ node.save_with_history!
+ newid=node.id
+ [0,id,newid]
end
- return user ? user.id : nil;
-end
+ # Read POI from database
+ # (only called on revert: POIs are usually read by whichways).
+ #
+ # Returns array of id, long, lat, hash of tags.
+ def getpoi(id) #:doc:
+ n = Node.find(id)
+ if n
+ return [n.id, n.lon, n.lat, n.tags_as_hash]
+ else
+ return [nil,nil,nil,'']
+ end
+ end
+ # Delete way and all constituent nodes. Also removes from any relations.
+ # Returns 0 (success), unchanged way id.
-# ====================================================================
-# AMF read subroutines
+ def deleteway(usertoken,way_id) #:doc:
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be deleted." end
-# ----- 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
+ # FIXME: would be good not to make two history entries when removing
+ # two nodes from the same relation
+ user = User.find(uid)
+ way = Way.find(way_id)
+ way.unshared_node_ids.each do |n|
+ deleteitemrelations(n,'node')
+ end
-def getint(s)
- s.getc*256+s.getc
-end
+ way.delete_with_relations_and_nodes_and_history(user)
+ return [0,way_id]
+ 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
+ # ====================================================================
+ # Support functions
-def getdouble(s)
- a=s.read(8).unpack('G') # G big-endian, E little-endian
- a[0]
-end
+ # Remove a node or way from all relations
-def getarray(s)
- len=getlong(s)
- arr=[]
- for i in (0..len-1)
- arr[i]=getvalue(s)
+ def deleteitemrelations(objid,type) #:doc:
+ relationids = RelationMember.find(:all, :conditions => ['member_type=? and member_id=?', type, objid]).collect { |ws| ws.id }.uniq
+ relationids.each do |relid|
+ rel=Relation.find(relid)
+ rel.members.delete_if {|x| x[0]==type and x[1]==objid}
+ rel.save_with_history!
+ end
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
+ # Break out node tags into a hash
+ # (should become obsolete as of API 0.6)
-# ----- 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
+ def tagstring_to_hash(a) #:doc:
+ tags={}
+ Tags.split(a) do |k, v|
+ tags[k]=v
+ end
+ tags
end
-end
-
-# ====================================================================
-# AMF write subroutines
-# ----- putdata envelope data into AMF writeable form
-# ----- encodevalue pack variables as AMF
+ # Authenticate token
+ # (could be removed if no-one uses the username+password form)
-def putdata(index,n)
- d =encodestring(index+"/onResult")
- d+=encodestring("null")
- d+=[-1].pack("N")
- d+=encodevalue(n)
-end
+ def getuserid(token) #:doc:
+ if (token =~ /^(.+)\+(.+)$/) then
+ user = User.authenticate(:username => $1, :password => $2)
+ else
+ user = User.authenticate(:token => token)
+ 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)
+ return user ? user.id : nil;
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
+ # Compare two floating-point numbers to within 0.0000001
-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 fpcomp(a,b) #:doc:
+ return ((a/0.0000001).round==(b/0.0000001).round)
+ end
-def coord2lat(a,masterscale,basey)
- y2lat((a-250)/-masterscale+basey)
-end
-def coord2long(a,masterscale,baselong)
- (a-350)/masterscale+baselong
-end
+ # ====================================================================
+ # Alternative SQL queries for getway/whichways
-def y2lat(a)
- 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2)
-end
+ def sql_find_way_ids_in_area(xmin,ymin,xmax,ymax)
+ sql=<<-EOF
+ SELECT DISTINCT current_way_nodes.id AS wayid
+ FROM current_way_nodes
+ INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
+ INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
+ WHERE current_nodes.visible=1
+ AND current_ways.visible=1
+ AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
+ EOF
+ return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['wayid'].to_i }
+ end
+
+ def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
+ sql=<<-EOF
+ SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.tags
+ FROM current_nodes
+ LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
+ WHERE current_nodes.visible=1
+ AND cwn.id IS NULL
+ AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
+ EOF
+ return ActiveRecord::Base.connection.select_all(sql).collect { |n| [n['id'].to_i,n['lon'].to_f,n['lat'].to_f,tagstring_to_hash(n['tags'])] }
+ end
+
+ def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
+ # ** It would be more Potlatchy to get relations for nodes within ways
+ # during 'getway', not here
+ sql=<<-EOF
+ SELECT DISTINCT cr.id AS relid
+ FROM current_relations cr
+ INNER JOIN current_relation_members crm ON crm.id=cr.id
+ INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node'
+ WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
+ EOF
+ unless way_ids.empty?
+ sql+=<<-EOF
+ UNION
+ SELECT DISTINCT cr.id AS relid
+ FROM current_relations cr
+ INNER JOIN current_relation_members crm ON crm.id=cr.id
+ WHERE crm.member_type='way'
+ AND crm.member_id IN (#{way_ids.join(',')})
+ EOF
+ end
+ return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['relid'].to_i }.uniq
+ end
+
+ def sql_get_nodes_in_way(wayid)
+ points=[]
+ sql=<<-EOF
+ SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,tags
+ FROM current_way_nodes,current_nodes
+ WHERE current_way_nodes.id=#{wayid.to_i}
+ AND current_way_nodes.node_id=current_nodes.id
+ AND current_nodes.visible=1
+ ORDER BY sequence_id
+ EOF
+ ActiveRecord::Base.connection.select_all(sql).each do |row|
+ points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nil,tagstring_to_hash(row['tags'])]
+ end
+ points
+ end
+
+ def sql_get_tags_in_way(wayid)
+ tags={}
+ ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
+ tags[row['k']]=row['v']
+ end
+ tags
+ end
end
projects / rails.git / blobdiff