X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/2fb5f6d9797deaaf6be32d91c875c07be79df063..168f51e40a208c6baf98f12210746495e4b512d6:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 093f863a7..febc4db68 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,699 +1,640 @@ +# 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 amf_read and amf_write methods (which distribute 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"). + class AmfController < ApplicationController require 'stringio' - # 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 - - headers.times do # Read each header - name=getstring(req) # | - req.getc # | skip boolean - value=getvalue(req) # | - header["name"]=value # | - end - - bodies=getint(req) # Read number of bodies - bodies.times do # Read each body - message=getstring(req) # | get message name - index=getstring(req) # | get index in response sequence - bytes=getlong(req) # | get total size in bytes - args=getvalue(req) # | get response (probably an array) - - case message - when 'getpresets'; results[index]=putdata(index,getpresets) - when 'whichways'; results[index]=putdata(index,whichways(args)) - when 'getway'; results[index]=putdata(index,getway(args)) - when 'putway'; results[index]=putdata(index,putway(args)) - when 'deleteway'; results[index]=putdata(index,deleteway(args)) - 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 + include Potlatch + + session :off + before_filter :check_write_availability + + # Main AMF handlers: process the raw AMF string (using AMF library) and + # calls each action (private method) accordingly. + # ** FIXME: refactor to reduce duplication of code across read/write + + def amf_read + 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 + + # 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 + + 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 'getnode_history'; results[index]=AMF.putdata(index,getnode_history(args[0].to_i)) + when 'findrelations'; results[index]=AMF.putdata(index,findrelations(*args)) + when 'getpoi'; results[index]=AMF.putdata(index,getpoi(*args)) + end + end + sendresponse(results) + end + def amf_write + req=StringIO.new(request.raw_post+0.chr) + req.read(2) + results={} + renumberednodes={} # Shared across repeated putways + renumberedways={} # Shared across repeated putways + + 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 + + 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 '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)) + end + end + sendresponse(results) end private - # ==================================================================== - # Remote calls - - # ----- getpresets - # return presets,presetmenus and presetnames arrays - - def getpresets - presets={} - presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[] - presetnames={}; presetnames['point']={}; presetnames['way']={} - presettype='' - presetcategory='' - - # File.open("config/potlatch/presets.txt") do |file| - - # Temporary patch to get around filepath problem - # To remove this patch and make the code nice again: - # 1. uncomment above line - # 2. fix the path in the above line - # 3. delete this here document, and the following line (StringIO....) - - txt=<<-EOF -way/road -motorway: highway=motorway,ref=(type road number) -trunk road: highway=trunk,ref=(type road number),name=(type road name) -primary road: highway=primary,ref=(type road number),name=(type road name) -secondary road: highway=secondary,ref=(type road number),name=(type road name) -residential road: highway=residential,name=(type road name) -unclassified road: highway=unclassified,name=(type road name) - -way/footway -footpath: highway=footway,foot=yes -bridleway: highway=bridleway,foot=yes,horse=yes,bicycle=yes -byway: highway=byway,foot=yes,horse=yes,bicycle=yes,motorcar=yes -permissive path: highway=footway,foot=permissive - -way/cycleway -cycle lane: highway=cycleway,cycleway=lane,ncn_ref= -cycle track: highway=cycleway,cycleway=track,ncn_ref= -cycle lane (NCN): highway=cycleway,cycleway=lane,name=(type name here),ncn_ref=(type route number) -cycle track (NCN): highway=cycleway,cycleway=track,name=(type name here),ncn_ref=(type route number) - -way/waterway -canal: waterway=canal,name=(type name here) -navigable river: waterway=river,boat=yes,name=(type name here) -navigable drain: waterway=drain,boat=yes,name=(type name here) -derelict canal: waterway=derelict_canal,name=(type name here) -unnavigable river: waterway=river,boat=no,name=(type name here) -unnavigable drain: waterway=drain,boat=no,name=(type name here) - -way/railway -railway: railway=rail -tramway: railway=tram -light railway: railway=light_rail -preserved railway: railway=preserved -disused railway tracks: railway=disused -course of old railway: railway=abandoned - -point/road -mini roundabout: highway=mini_roundabout -traffic lights: highway=traffic_signals - -point/footway -bridge: highway=bridge -gate: highway=gate -stile: highway=stile -cattle grid: highway=cattle_grid - -point/cycleway -gate: highway=gate - -point/waterway -lock gate: waterway=lock_gate -weir: waterway=weir -aqueduct: waterway=aqueduct -winding hole: waterway=turning_point -mooring: waterway=mooring - -point/railway -station: railway=station -viaduct: railway=viaduct -level crossing: railway=crossing -EOF - - StringIO.open(txt) do |file| - file.each_line {|line| - t=line.chomp - if (t=~/(\w+)\/(\w+)/) then - presettype=$1 - presetcategory=$2 - presetmenus[presettype].push(presetcategory) - presetnames[presettype][presetcategory]=["(no preset)"] - elsif (t=~/^(.+):\s?(.+)$/) then - pre=$1; kv=$2 - presetnames[presettype][presetcategory].push(pre) - presets[pre]={} - kv.split(',').each {|a| - if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 end - } - end - } - end - return [presets,presetmenus,presetnames] + # Return presets (default tags, localisation etc.): + # uses POTLATCH_PRESETS global, set up in OSM::Potlatch. + + def getpresets() #:doc: + return POTLATCH_PRESETS 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,current_ways "+ - " WHERE segment_id=current_segments.id "+ - " AND current_segments.visible=1 "+ - " AND node_a=current_nodes.id "+ - " AND current_ways.id=current_way_segments.id "+ - " AND current_ways.visible=1 "+ - " AND (latitude BETWEEN "+(args[1].to_f-0.01).to_s+" AND "+(args[3].to_f+0.01).to_s+") "+ - " AND (longitude BETWEEN "+(args[0].to_f-0.01).to_s+" AND "+(args[2].to_f+0.01).to_s+")") - - ways = waylist.collect {|a| a.wayid.to_i } # get an array of way id's - - pointlist =ActiveRecord::Base.connection.select_all("SELECT current_nodes.id,current_nodes.tags "+ - " FROM current_nodes "+ - " LEFT OUTER JOIN current_segments cs1 ON cs1.node_a=current_nodes.id "+ - " LEFT OUTER JOIN current_segments cs2 ON cs2.node_b=current_nodes.id "+ - " WHERE (latitude BETWEEN "+(args[1].to_f-0.01).to_s+" AND "+(args[3].to_f+0.01).to_s+") "+ - " AND (longitude BETWEEN "+(args[0].to_f-0.01).to_s+" AND "+(args[2].to_f-0.01).to_s+") "+ - " AND cs1.id IS NULL AND cs2.id IS NULL "+ - " AND current_nodes.visible=1") - - points = pointlist.collect {|a| [a['id'],tag2array(a['tags'])] } # get a list of node ids and their tags - - return [ways,points] + # 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. + + def whichways(xmin, ymin, xmax, ymax) #:doc: + enlarge = [(xmax-xmin)/8,0.01].min + xmin -= enlarge; ymin -= enlarge + xmax += enlarge; ymax += enlarge + + 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 + # 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 = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => "visible = 1") + + Relation.find_for_ways(way_ids, :conditions => "visible = 1") + relation_ids = relations.collect { |relation| relation.id }.uniq + end + + [way_ids, points, relation_ids] 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 = ymin = 999999 - xmax = 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) - points << [xs1,ys1,row['id1'].to_i,0,tag2array(row['tags1']),0] if (row['id1'].to_i!=lastid) - 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] + # Find deleted ways in current bounding box (similar to whichways, but ways + # with a deleted node only - not POIs or relations). + + 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) - usertoken,originalway,points,attributes,baselong,basey,masterscale=args - uid=getuserid(usertoken) - return if !uid - db_uqs='uniq'+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquesegments table name, typically 51 chars - db_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 = ymin = 999999 - xmax = 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] + # Get a way including nodes and tags. + # Returns 0 (success), a Potlatch-style array of points, and a hash of tags. + + 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 + way = Way.find(wayid) + points = way.nodes.collect do |node| + nodetags=node.tags_as_hash + nodetags.delete('created_by') + [node.lon, node.lat, node.id, nodetags] + end + tags = way.tags + end + + [wayid, points, tags] 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 + # 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. + + 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 'way', id, and + # an array of previous versions. + + def getway_history(wayid) #:doc: + history = Way.find(wayid).old_ways.reverse.collect do |old_way| + user = old_way.user.data_public? ? old_way.user.display_name : 'anonymous' + uid = old_way.user.data_public? ? old_way.user.id : 0 + [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid] + end + + ['way',wayid,history] + 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 + # Find history of a node. Returns 'node', id, and + # an array of previous versions. -def createuniquesegments(way,uqs_name) - sql=<<-EOF - CREATE TEMPORARY TABLE #{uqs_name} - SELECT a.segment_id - FROM (SELECT DISTINCT segment_id FROM current_way_segments - WHERE id = #{way}) a - LEFT JOIN current_way_segments b - ON b.segment_id = a.segment_id - AND b.id != #{way} - WHERE b.segment_id IS NULL - EOF - ActiveRecord::Base.connection.execute(sql) -end + def getnode_history(nodeid) #:doc: + history = Node.find(nodeid).old_nodes.reverse.collect do |old_node| + user = old_node.user.data_public? ? old_node.user.display_name : 'anonymous' + uid = old_node.user.data_public? ? old_node.user.id : 0 + [old_node.timestamp.to_i, old_node.timestamp.strftime("%d %b %Y, %H:%M"), old_node.visible ? 1 : 0, user, uid] + end + ['node',nodeid,history] + end -def sqlescape(a) - a.gsub("'","''").gsub(92.chr,92.chr+92.chr) -end + # Get a relation with all tags and members. + # Returns: + # 0. relation id, + # 1. hash of tags, + # 2. list of members. + + def getrelation(relid) #:doc: + rel = Relation.find(relid) -def tag2array(a) - tags={} - a.gsub(';;;','#%').split(';').each do |b| - b.gsub!('#%',';;;') - b.gsub!('===','#%') - k,v=b.split('=') - if k.nil? then k='' end - if v.nil? then v='' end - tags[k.gsub('#%','=')]=v.gsub('#%','=') + [relid, rel.tags, rel.members] 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('=','===') + # Find relations with specified name/id. + # Returns array of relations, each in same form as getrelation. + + def findrelations(searchterm) + rels = [] + if searchterm.to_i>0 then + rel = Relation.find(searchterm.to_i) + if rel and rel.visible then + rels.push([rel.id, rel.tags, rel.members]) + end + else + RelationTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", searchterm] ).each do |t| + if t.relation.visible then + rels.push([t.relation.id, t.relation.tags, t.relation.members]) + end + end + end + rels 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}'") + # Save a relation. + # Returns + # 0. 0 (success), + # 1. original relation id (unchanged), + # 2. new relation id. + + 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 relation could not be saved." end + + relid = relid.to_i + visible = visible.to_i + + # 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' + end + if mid + typedmembers << [m[0], mid, m[2]] + end + end + + # assign new contents + rel.members = typedmembers + rel.tags = tags + rel.visible = visible + rel.user_id = uid + + # 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. + + #if !rel.preconditions_ok? + # return -2, "Relation preconditions failed" + #else + rel.save_with_history! + #end + + [0, relid, rel.id] end -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 + + 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 + + if points.length < 2 then return -2,"Server error - way is only #{points.length} points long." end + + # -- Get unique nodes + + if originalway < 0 + way = Way.new + uniques = [] + else + way = Way.find(originalway) + uniques = way.unshared_node_ids + end + + # -- 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) + nodetags=node.tags_as_hash + nodetags.delete('created_by') + if !fpcomp(lat, node.lat) or !fpcomp(lon, node.lon) or + n[4] != nodetags or !node.visible? + 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 + + # -- Save revised way + + way.tags = attributes + way.nds = nodes + way.user_id = uid + way.visible = true + way.save_with_history! + + # -- Delete any unique nodes + + uniques.each do |n| + deleteitemrelations(n, 'node') + + node = Node.find(n) + node.user_id = uid + node.visible = false + node.save_with_history! + end + + [0, originalway, way.id, renumberednodes] + end -# ==================================================================== -# AMF read subroutines + # 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 + + node.user_id = uid + node.lat = lat + node.lon = lon + node.tags = Tags.join(tags) + node.visible = visible + node.save_with_history! + + [0, id, node.id] + 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 + # 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,timestamp) #:doc: + if timestamp>0 then + n = OldNode.find(id, :conditions=>['UNIX_TIMESTAMP(timestamp)=?',timestamp]) + else + n = Node.find(id) + end + + if n + return [n.id, n.lon, n.lat, n.tags_as_hash] + else + return [nil, nil, nil, ''] + end + end -def getint(s) - s.getc*256+s.getc -end + # Delete way and all constituent nodes. Also removes from any relations. + # Returns 0 (success), unchanged way id. -def getlong(s) - ((s.getc*256+s.getc)*256+s.getc)*256+s.getc -end + 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 -def getstring(s) - len=s.getc*256+s.getc - s.read(len) -end + # 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 + deleteitemrelations(way_id, 'way') -def getdouble(s) - a=s.read(8).unpack('G') # G big-endian, E little-endian - a[0] -end + way.delete_with_relations_and_nodes_and_history(user) -def getarray(s) - len=getlong(s) - arr=[] - for i in (0..len-1) - arr[i]=getvalue(s) + [0, way_id] 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 + # ==================================================================== + # Support functions -# ----- putdata envelope data into AMF writeable form -# ----- encodevalue pack variables as AMF + # Remove a node or way from all relations -def putdata(index,n) - d =encodestring(index+"/onResult") - d+=encodestring("null") - d+=[-1].pack("N") - d+=encodevalue(n) -end + def deleteitemrelations(objid, type) #:doc: + relations = RelationMember.find(:all, + :conditions => ['member_type = ? and member_id = ?', type, objid], + :include => :relation).collect { |rm| rm.relation }.uniq -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) + relations.each do |rel| + rel.members.delete_if { |x| x[0] == type and x[1] == objid } + rel.save_with_history! + end 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 + # Break out node tags into a hash + # (should become obsolete as of API 0.6) -def encodestring(n) - a,b=n.size.divmod(256) - a.chr+b.chr+n -end + def tagstring_to_hash(a) #:doc: + tags={} + Tags.split(a) do |k, v| + tags[k]=v + end + tags + end -def encodedouble(n) - [n].pack('G') -end + # Authenticate token + # (could be removed if no-one uses the username+password form) -def encodelong(n) - [n].pack('N') -end + def getuserid(token) #:doc: + if (token =~ /^(.+)\+(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end -# ==================================================================== -# Co-ordinate conversion + return user ? user.id : nil; + end -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 fpcomp(a,b) #:doc: + return ((a/0.0000001).round==(b/0.0000001).round) + end -def lat2y(a) - 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) -end + # Send AMF response + + def sendresponse(results) + a,b=results.length.divmod(256) + render :content_type => "application/x-amf", :text => proc { |response, output| + output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr + results.each do |k,v| + output.write(v) + end + } + end -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 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| + nodetags=tagstring_to_hash(row['tags']) + nodetags.delete('created_by') + points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags] + 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 -def y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) end -end +# Local Variables: +# indent-tabs-mode: t +# tab-width: 4 +# End: