X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/c8972a0859ac1e8ba3598638c58e33d3f21ca059..88f469eec179d587f9539dd4b99032b847fc16f8:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index f4f762a39..212343607 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,257 +1,754 @@ +# 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). +# +# See Also Potlatch::Potlatch and Potlatch::AMF +# +# Public domain. +# editions Systeme D / Richard Fairhurst 2004-2008 +# +# All in/out parameters are floats unless explicitly stated. +# +# 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]}") class AmfController < ApplicationController require 'stringio' - # Still to do: - # - all db interaction - # - user authentication - # - (also pass lat/lon through from view tab to edit tab) + include Potlatch - # ==================================================================== - # Main AMF handler - - # ---- talk process AMF request + session :off + before_filter :check_write_availability + # Main AMF handler. Tha talk method takes in AMF, figures out what to do and dispatched to the appropriate private method def talk - req=StringIO.new(request.raw_post) # Get POST data as request - req.read(2) # Skip version indicator and client ID - results={} # Results of each body - - # ------------- - # Parse request - - headers=getint(req) # Read number of headers - for i in (1..headers) # Read each header - name=getstring(req) # | - req.getc # | skip boolean - value=getvalue(req) # | - header["name"]=value # | - end - - bodies=getint(req) # Read number of bodies - for i in (1..bodies) # Read each body - message=getstring(req) # | get message name - index=getstring(req) # | get index in response sequence - bytes=getlong(req) # | get total size in bytes - args=getvalue(req) # | get response (probably an array) - - case message - when 'getpresets'; results[index]=putdata(index,getpresets) - when 'whichways'; results[index]=putdata(index,whichways(args)) - when 'getway'; results[index]=putdata(index,getway(args)) - when 'putway'; results[index]=putdata(index,putway(args)) - when 'deleteway'; results[index]=putdata(index,deleteway(args)) - end - end - - # ------------------ - # Write out response - - response.headers["Content-Type"]="application/x-amf" - a,b=results.length.divmod(256) - ans=0.chr+0.chr+0.chr+0.chr+a.chr+b.chr - results.each do |k,v| - ans+=v - end - render :text=>ans + 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=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)) + when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args)) + when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args)) + when 'putway'; r=putway(args,renumberednodes) + renumberednodes=r[3] + results[index]=AMF.putdata(index,r) + when 'deleteway'; results[index]=AMF.putdata(index,deleteway(args)) + when 'putpoi'; results[index]=AMF.putdata(index,putpoi(args)) + when 'getpoi'; results[index]=AMF.putdata(index,getpoi(args)) + end + end + + # ------------------ + # Write out response + + RAILS_DEFAULT_LOGGER.info(" Response: start") + a,b=results.length.divmod(256) + render :content_type => "application/x-amf", :text => proc { |response, output| + output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr + results.each do |k,v| + output.write(v) + end + } + RAILS_DEFAULT_LOGGER.info(" Response: end") + end + + private + + # Return presets (default tags and crap) to potlatch. + # Uses POTLATCH_PRESETS global, set up in OSM::Potlatch + def getpresets #:doc: + return POTLATCH_PRESETS + end + + # ----- whichways + # Find all the way ids and nodes (including tags and projected lat/lng) which aren't part of those ways in an are + # + # The argument is an array containing the following, in order: + # 0. minimum longitude + # 1. minimum latitude + # 2. maximum longitude + # 3. maximum latitude + # 4. baselong, 5. basey, 6. masterscale as above + def whichways(args) #:doc: + 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}") + + # 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_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash] } + + [way_ids,points] + end + + # ----- whichways_deleted + # return array of deleted ways in current bounding box + # in: as whichways + # does: finds all deleted ways with a deleted node in bounding box + # out: [0] array of way ids + def whichways_deleted(args) #:doc: + xmin = args[0].to_f-0.01 + ymin = args[1].to_f-0.01 + xmax = args[2].to_f+0.01 + ymax = args[3].to_f+0.01 + baselong = args[4] + basey = args[5] + masterscale = args[6] + + sql=<<-EOF + SELECT DISTINCT current_ways.id + FROM current_nodes,way_nodes,current_ways + WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + AND way_nodes.node_id=current_nodes.id + AND way_nodes.id=current_ways.id + AND current_nodes.visible=0 + AND current_ways.visible=0 + EOF + waylist = ActiveRecord::Base.connection.select_all(sql) + ways = waylist.collect {|a| a['id'].to_i } + [ways] + end + + # ----- getway + # Get a way with all of it's nodes and tags + # The input is an array with the following components, in order: + # 0. wayid - the ID of the way to get + # 1. baselong - origin of SWF map (longitude) + # 2. basey - origin of SWF map (latitude) + # 3. masterscale - SWF map scale + # + # The output is an array which contains all the nodes (with projected + # latitude and longitude) and tags for a way (and all the nodes tags). + # It also has the way's unprojected (WGS84) bbox. + # + # FIXME: The server really shouldn't be figuring out a ways bounding box and doing projection for potlatch + # FIXME: the argument splitting should be done in the 'talk' method, not here + def getway(args) #:doc: + wayid,baselong,basey,masterscale = args + wayid = wayid.to_i + + RAILS_DEFAULT_LOGGER.info(" Message: getway, id=#{wayid}") + + way = Way.find(wayid, :include => :nodes) + long_array = [] + lat_array = [] + points = [] + + way.nodes.each do |node| + projected_longitude = node.lon_potlatch(baselong,masterscale) # do projection for potlatch + projected_latitude = node.lat_potlatch(basey,masterscale) + id = node.id + tags_hash = node.tags_as_hash + + points << [projected_longitude, projected_latitude, id, nil, tags_hash] + long_array << projected_longitude + lat_array << projected_latitude + end + + [wayid,points,way.tags,long_array.min,long_array.max,lat_array.min,lat_array.max] + end + + # ----- getway_old + # returns old version of way + # in: [0] way id, + # [1] way version to get (or -1 for "last deleted version") + # [2] baselong, [3] basey, [4] masterscale + # does: gets old version of way and all constituent nodes + # for undelete, always uses the most recent version of each node + # (even if it's moved) + # for revert, uses the historic version of each node, but if that node is + # still visible and has been changed since, generates a new node id + # out: [0] 0 (code for success), [1] SWF object name, + # [2] array of points (as getway _except_ [3] is node.visible?, 0 or 1), + # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox), + # [8] way version + def getway_old(args) #:doc: + 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 + + wayid,version,baselong,basey,masterscale=args + wayid = wayid.to_i + version = version.to_i + xmin = ymin = 999999 + xmax = ymax = -999999 + points=[] + if version<0 + historic=false + version=getlastversion(wayid,version) + else + historic=true + end + readwayquery_old(wayid,version,historic).each { |row| + points<<[long2coord(row['longitude'].to_f,baselong,masterscale),lat2coord(row['latitude'].to_f,basey,masterscale),row['id'].to_i,row['visible'].to_i,tag2array(row['tags'].to_s)] + xmin=[xmin,row['longitude'].to_f].min + xmax=[xmax,row['longitude'].to_f].max + ymin=[ymin,row['latitude' ].to_f].min + ymax=[ymax,row['latitude' ].to_f].max + } + + # get tags from this version + attributes={} + attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM way_tags WHERE id=#{wayid} AND version=#{version}" + attrlist.each {|a| attributes[a['k'].gsub(':','|')]=a['v'] } + attributes['history']="Retrieved from v"+version.to_s + + [0,wayid,points,attributes,xmin,xmax,ymin,ymax,version] + end + # ----- getway_history + # find history of a way + # in: [0] way id + # does: finds history of a way + # out: [0] array of previous versions (where each is + # [0] version, [1] db timestamp (string), + # [2] visible 0 or 1, + # [3] username or 'anonymous' (string)) + def getway_history(args) #:doc: + wayid=args[0] + history=[] + sql=<<-EOF + SELECT version,timestamp,visible,display_name,data_public + FROM ways,users + WHERE ways.id=#{wayid} + AND ways.user_id=users.id + AND ways.visible=1 + ORDER BY version DESC + EOF + histlist=ActiveRecord::Base.connection.select_all(sql) + histlist.each { |row| + if row['data_public'].to_i==1 then user=row['display_name'] else user='anonymous' end + history<<[row['version'],row['timestamp'],row['visible'],user] + } + [history] end + # ----- putway + # saves a way to the database + # in: [0] user token (string), + # [1] original way id (may be negative), + # [2] array of points (as getway/getway_old), + # [3] hash of way tags, + # [4] original way version (0 if not a reverted/undeleted way), + # [5] baselong, [6] basey, [7] masterscale + # does: saves way to the database + # all constituent nodes are created/updated as necessary + # (or deleted if they were in the old version and are otherwise unused) + # out: [0] 0 (code for success), [1] original way id (unchanged), + # [2] new way id, [3] hash of renumbered nodes (old id=>new id), + # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox) + def putway(args,renumberednodes) #:doc: + 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 - # ==================================================================== - # Remote calls - - def getpresets - presets={} - presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[] - presetnames={}; presetnames['point']={}; presetnames['way']={} - presettype='' - presetcategory='' - - File.open("config/potlatch/presets.txt") do |file| - file.each_line {|line| - t=line.chomp - if (t=~/(\w+)\/(\w+)/) then - presettype=$1 - presetcategory=$2 - presetmenus[presettype].push(presetcategory) - presetnames[presettype][presetcategory]=["(no preset)"] - elsif (t=~/^(.+):\s?(.+)$/) then - pre=$1; kv=$2 - presetnames[presettype][presetcategory].push(pre) - presets[pre]={} - kv.split(',').each {|a| - if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 end - } - end - } - end - [presets,presetmenus,presetnames] - end - - def whichways(args) - # to do - end - - def getway(args) - # to do - end - - def putway(args) - # to do - end - - def deleteway(args) - # to do - end - - # need support functions here too: - # database support functions (readwayquery, createuniquesegments) - # tag2array, array2tag - # getuserid - - # ==================================================================== - # AMF read subroutines - - # ----- getint return two-byte integer - # ----- getlong return four-byte long - # ----- getstring return string with two-byte length - # ----- getdouble return eight-byte double-precision float - # ----- getobject return object/hash - # ----- getarray return numeric array - - def getint(s) - s.getc*256+s.getc - end - - def getlong(s) - ((s.getc*256+s.getc)*256+s.getc)*256+s.getc - end - - def getstring(s) - len=s.getc*256+s.getc - s.read(len) - end - - def getdouble(s) - a=s.read(8).unpack('G') # G big-endian, E little-endian - a[0] - end - - def getarray(s) - len=getlong(s) - arr=[] - for i in (0..len-1) - arr[i]=getvalue(s) - end - arr - end - - def getobject(s) - arr={} - while (key=getstring(s)) - if (key=='') then break end - arr[key]=getvalue(s) - end - s.getc # skip the 9 'end of object' value - arr - end - - # ----- getvalue parse and get value - - def getvalue(s) - case s.getc - when 0; return getdouble(s) # number - when 1; return s.getc # boolean - when 2; return getstring(s) # string - when 3; return getobject(s) # object/hash - when 5; return nil # null - when 6; return nil # undefined - when 8; s.read(4) # mixedArray - return getobject(s) # | - when 10;return getarray(s) # array - else; return nil # error - end - end - - # ==================================================================== - # AMF write subroutines - - # ----- putdata envelope data into AMF writeable form - # ----- encodevalue pack variables as AMF - - def putdata(index,n) - d =encodestring(index+"/onResult") - d+=encodestring("null") - d+=[-1].pack("N") - d+=encodevalue(n) - end - - def encodevalue(n) - case n.class.to_s - when 'Array' - a=10.chr+encodelong(n.length) - n.each do |b| - a+=encodevalue(b) - end - a - when 'Hash' - a=3.chr - n.each do |k,v| - a+=encodestring(k)+encodevalue(v) - end - a+0.chr+0.chr+9.chr - when 'String' - 2.chr+encodestring(n) - when 'Bignum','Fixnum','Float' - 0.chr+encodedouble(n) - when 'NilClass' - 5.chr - 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) - -(lat2y(a)-$basey)*$masterscale+250 - end - - def long2coord(a) - (a-$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+$basey) - end - - def coord2long(a) - (a-350)/$masterscale+$baselong - end - - def y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) - end + RAILS_DEFAULT_LOGGER.info(" putway authenticated happily") + db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars + db_now='@now'+(rand*100).to_i.to_s+uid.to_s+originalway.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars + ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") + originalway=originalway.to_i + oldversion=oldversion.to_i + RAILS_DEFAULT_LOGGER.info(" Message: putway, id=#{originalway}") + + # -- Temporary check for null IDs + + points.each do |a| + if a[2]==0 or a[2].nil? then return -2,"Server error - node with id 0 found in way #{originalway}." end + end + + # -- 3. read original way into memory + + xc={}; yc={}; tagc={}; vc={} + if originalway>0 + way=originalway + if oldversion==0 then r=readwayquery(way,false) + else r=readwayquery_old(way,oldversion,true) end + r.each { |row| + id=row['id'].to_i + if (id>0) then + xc[id]=row['longitude'].to_f + yc[id]=row['latitude' ].to_f + tagc[id]=row['tags'] + vc[id]=row['visible'].to_i + end + } + ActiveRecord::Base.connection.update("UPDATE current_ways SET timestamp=#{db_now},user_id=#{uid},visible=1 WHERE id=#{way}") + else + way=ActiveRecord::Base.connection.insert("INSERT INTO current_ways (user_id,timestamp,visible) VALUES (#{uid},#{db_now},1)") + end + + # -- 4. get version by inserting new row into ways + + version=ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},1)") + + # -- 5. compare nodes and update xmin,xmax,ymin,ymax + + xmin=ymin= 999999 + xmax=ymax=-999999 + insertsql='' + nodelist=[] + + points.each_index do |i| + xs=coord2long(points[i][0],masterscale,baselong) + ys=coord2lat(points[i][1],masterscale,basey) + xmin=[xs,xmin].min; xmax=[xs,xmax].max + ymin=[ys,ymin].min; ymax=[ys,ymax].max + node=points[i][2].to_i + tagstr=array2tag(points[i][4]) + tagsql="'"+sqlescape(tagstr)+"'" + lat=(ys * 10000000).round + long=(xs * 10000000).round + tile=QuadTile.tile_for_point(ys, xs) + + # compare node + if node<0 + # new node - create + if renumberednodes[node.to_s].nil? + newnode=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes ( latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES ( #{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") + ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newnode},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") + points[i][2]=newnode + nodelist.push(newnode) + renumberednodes[node.to_s]=newnode.to_s + else + points[i][2]=renumberednodes[node.to_s].to_i + end + + elsif xc.has_key?(node) + nodelist.push(node) + # old node from original way - update + if ((xs/0.0000001).round!=(xc[node]/0.0000001).round or (ys/0.0000001).round!=(yc[node]/0.0000001).round or tagstr!=tagc[node] or vc[node]==0) + ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{node},#{lat},#{long},#{db_now},#{uid},1,#{tagsql},#{tile})") + ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},tags=#{tagsql},visible=1,tile=#{tile} WHERE id=#{node}") + end + else + # old node, created in another way and now added to this way + end + end + + # -- 6a. delete any nodes not in modified way + + createuniquenodes(way,db_uqn,nodelist) # nodes which appear in this way but no other + + sql=<<-EOF + INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile) + SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile + FROM current_nodes AS cn,#{db_uqn} + WHERE cn.id=node_id + EOF + ActiveRecord::Base.connection.insert(sql) + + sql=<<-EOF + UPDATE current_nodes AS cn, #{db_uqn} + SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid} + WHERE cn.id=node_id + EOF + ActiveRecord::Base.connection.update(sql) + + deleteuniquenoderelations(db_uqn,uid,db_now) + ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}") + + # 6b. insert new version of route into way_nodes + + insertsql ='' + currentsql='' + sequence =1 + points.each do |p| + if insertsql !='' then insertsql +=',' end + if currentsql!='' then currentsql+=',' end + insertsql +="(#{way},#{p[2]},#{sequence},#{version})" + currentsql+="(#{way},#{p[2]},#{sequence})" + sequence +=1 + end + + ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}"); + ActiveRecord::Base.connection.insert( "INSERT INTO way_nodes (id,node_id,sequence_id,version) VALUES #{insertsql}"); + ActiveRecord::Base.connection.insert( "INSERT INTO current_way_nodes (id,node_id,sequence_id ) VALUES #{currentsql}"); + + # -- 7. insert new way tags + + insertsql ='' + currentsql='' + attributes.each do |k,v| + if v=='' or v.nil? then next end + if v[0,6]=='(type ' then next end + if insertsql !='' then insertsql +=',' end + if currentsql!='' then currentsql+=',' end + insertsql +="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"',#{version})" + currentsql+="(#{way},'"+sqlescape(k.gsub('|',':'))+"','"+sqlescape(v)+"')" + end + + ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}") + if (insertsql !='') then ActiveRecord::Base.connection.insert("INSERT INTO way_tags (id,k,v,version) VALUES #{insertsql}" ) end + if (currentsql!='') then ActiveRecord::Base.connection.insert("INSERT INTO current_way_tags (id,k,v) VALUES #{currentsql}") end + + [0,originalway,way,renumberednodes,xmin,xmax,ymin,ymax] + end + + # ----- putpoi + # save POI to the database + # in: [0] user token (string), + # [1] original node id (may be negative), + # [2] projected longitude, [3] projected latitude, + # [4] hash of tags, [5] visible (0 to delete, 1 otherwise), + # [6] baselong, [7] basey, [8] masterscale + # does: saves POI node to the database + # refuses save if the node has since become part of a way + # out: [0] 0 (success), [1] original node id (unchanged), + # [2] new node id + def putpoi(args) #:doc: + usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args + uid=getuserid(usertoken) + if !uid then return -1,"You are not logged in, so the point could not be saved." end + + db_now='@now'+(rand*100).to_i.to_s+uid.to_s+id.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars + ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") + + id=id.to_i + visible=visible.to_i + if visible==0 then + # if deleting, check node hasn't become part of a way + inway=ActiveRecord::Base.connection.select_one("SELECT cw.id FROM current_ways cw,current_way_nodes cwn WHERE cw.id=cwn.id AND cw.visible=1 AND cwn.node_id=#{id} LIMIT 1") + unless inway.nil? then return -1,"The point has since become part of a way, so you cannot save it as a POI." end + deleteitemrelations(id,'node',uid,db_now) + end + + x=coord2long(x.to_f,masterscale,baselong) + y=coord2lat(y.to_f,masterscale,basey) + tagsql="'"+sqlescape(array2tag(tags))+"'" + lat=(y * 10000000).round + long=(x * 10000000).round + tile=QuadTile.tile_for_point(y, x) + + if (id>0) then + ActiveRecord::Base.connection.insert("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{id},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); + ActiveRecord::Base.connection.update("UPDATE current_nodes SET latitude=#{lat},longitude=#{long},timestamp=#{db_now},user_id=#{uid},visible=#{visible},tags=#{tagsql},tile=#{tile} WHERE id=#{id}"); + newid=id + else + newid=ActiveRecord::Base.connection.insert("INSERT INTO current_nodes (latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); + ActiveRecord::Base.connection.update("INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tags,tile) VALUES (#{newid},#{lat},#{long},#{db_now},#{uid},#{visible},#{tagsql},#{tile})"); + end + [0,id,newid] + end + + # ----- getpoi + # read POI from database + # (only called on revert: POIs are usually read by whichways) + # in: [0] node id, [1] baselong, [2] basey, [3] masterscale + # does: reads POI + # out: [0] id (unchanged), [1] projected long, [2] projected lat, + # [3] hash of tags + def getpoi(args) #:doc: + id,baselong,basey,masterscale = args + + n = Node.find(id.to_i) + if n + return [n.id, n.long_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash] + else + return [nil,nil,nil,''] + end + end + + # ----- deleteway + # delete way and constituent nodes from database + # in: [0] user token (string), [1] way id + # does: deletes way from db and any constituent nodes not used elsewhere + # also removes ways/nodes from any relations they're in + # out: [0] 0 (success), [1] way id (unchanged) + def deleteway(args) #:doc: + + usertoken,way=args + + RAILS_DEFAULT_LOGGER.info(" Message: deleteway, id=#{way}") + uid=getuserid(usertoken) + if !uid then return -1,"You are not logged in, so the way could not be deleted." end + + way=way.to_i + db_uqn='unin'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # temp uniquenodes table name, typically 51 chars + db_now='@now'+(rand*100).to_i.to_s+uid.to_s+way.to_i.abs.to_s+Time.new.to_i.to_s # 'now' variable name, typically 51 chars + ActiveRecord::Base.connection.execute("SET #{db_now}=NOW()") + + # - delete any otherwise unused nodes + + createuniquenodes(way,db_uqn,[]) + + # unless (preserve.empty?) then + # ActiveRecord::Base.connection.execute("DELETE FROM #{db_uqn} WHERE node_id IN ("+preserve.join(',')+")") + # end + + sql=<<-EOF + INSERT INTO nodes (id,latitude,longitude,timestamp,user_id,visible,tile) + SELECT DISTINCT cn.id,cn.latitude,cn.longitude,#{db_now},#{uid},0,cn.tile + FROM current_nodes AS cn,#{db_uqn} + WHERE cn.id=node_id + EOF + ActiveRecord::Base.connection.insert(sql) + + sql=<<-EOF + UPDATE current_nodes AS cn, #{db_uqn} + SET cn.timestamp=#{db_now},cn.visible=0,cn.user_id=#{uid} + WHERE cn.id=node_id + EOF + ActiveRecord::Base.connection.update(sql) + + deleteuniquenoderelations(db_uqn,uid,db_now) + ActiveRecord::Base.connection.execute("DROP TEMPORARY TABLE #{db_uqn}") + + # - delete way + + ActiveRecord::Base.connection.insert("INSERT INTO ways (id,user_id,timestamp,visible) VALUES (#{way},#{uid},#{db_now},0)") + ActiveRecord::Base.connection.update("UPDATE current_ways SET user_id=#{uid},timestamp=#{db_now},visible=0 WHERE id=#{way}") + ActiveRecord::Base.connection.execute("DELETE FROM current_way_nodes WHERE id=#{way}") + ActiveRecord::Base.connection.execute("DELETE FROM current_way_tags WHERE id=#{way}") + deleteitemrelations(way,'way',uid,db_now) + [0,way] + end + + def readwayquery(id,insistonvisible) #:doc: + sql=<<-EOF + SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags,visible + FROM current_way_nodes,current_nodes + WHERE current_way_nodes.id=#{id} + AND current_way_nodes.node_id=current_nodes.id + EOF + if insistonvisible then sql+=" AND current_nodes.visible=1 " end + sql+=" ORDER BY sequence_id" + ActiveRecord::Base.connection.select_all(sql) + end + + # Get the latest version id of a way + def getlastversion(id,version) #:doc: + old_way = OldWay.find(:first, :conditions => ['id = ?' , id], :order => 'version DESC') + old_way.version + end + + def readwayquery_old(id,version,historic) #:doc: + # Node handling on undelete (historic=false): + # - always use the node specified, even if it's moved + + # Node handling on revert (historic=true): + # - if it's a visible node, use a new node id (i.e. not mucking up the old one) + # which means the SWF needs to allocate new ids + # - if it's an invisible node, we can reuse the old node id + + # get node list from specified version of way, + # and the _current_ lat/long/tags of each node + + row=ActiveRecord::Base.connection.select_one("SELECT timestamp FROM ways WHERE version=#{version} AND id=#{id}") + waytime=row['timestamp'] + + sql=<<-EOF + SELECT cn.id,visible,latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags + FROM way_nodes wn,current_nodes cn + WHERE wn.version=#{version} + AND wn.id=#{id} + AND wn.node_id=cn.id + ORDER BY sequence_id + EOF + rows=ActiveRecord::Base.connection.select_all(sql) + + # if historic (full revert), get the old version of each node + # - if it's in another way now, generate a new id + # - if it's not in another way, use the old ID + if historic then + rows.each_index do |i| + sql=<<-EOF + SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,tags,cwn.id AS currentway + FROM nodes n + LEFT JOIN current_way_nodes cwn + ON cwn.node_id=n.id + WHERE n.id=#{rows[i]['id']} + AND n.timestamp<="#{waytime}" + AND cwn.id!=#{id} + ORDER BY n.timestamp DESC + LIMIT 1 + EOF + row=ActiveRecord::Base.connection.select_one(sql) + unless row.nil? then + nx=row['longitude'].to_f + ny=row['latitude'].to_f + if (row['currentway'] && (nx!=rows[i]['longitude'].to_f or ny!=rows[i]['latitude'].to_f or row['tags']!=rows[i]['tags'])) then rows[i]['id']=-1 end + rows[i]['longitude']=nx + rows[i]['latitude' ]=ny + rows[i]['tags' ]=row['tags'] + end + end + end + rows + end + + def createuniquenodes(way,uqn_name,nodelist) #:doc: + # Find nodes which appear in this way but no others + sql=<<-EOF + CREATE TEMPORARY TABLE #{uqn_name} + SELECT a.node_id + FROM (SELECT DISTINCT node_id FROM current_way_nodes + WHERE id=#{way}) a + LEFT JOIN current_way_nodes b + ON b.node_id=a.node_id + AND b.id!=#{way} + WHERE b.node_id IS NULL + EOF + unless nodelist.empty? then + sql+="AND a.node_id NOT IN ("+nodelist.join(',')+")" + end + ActiveRecord::Base.connection.execute(sql) + end + + + + # ==================================================================== + # Relations handling + # deleteuniquenoderelations(uqn_name,uid,db_now) + # deleteitemrelations(way|node,'way'|'node',uid,db_now) + + def deleteuniquenoderelations(uqn_name,uid,db_now) #:doc: + sql=<<-EOF + SELECT node_id,cr.id FROM #{uqn_name},current_relation_members crm,current_relations cr + WHERE crm.member_id=node_id + AND crm.member_type='node' + AND crm.id=cr.id + AND cr.visible=1 + EOF + + relnodes=ActiveRecord::Base.connection.select_all(sql) + relnodes.each do |a| + removefromrelation(a['node_id'],'node',a['id'],uid,db_now) + end + end + + def deleteitemrelations(objid,type,uid,db_now) #:doc: + sql=<<-EOF + SELECT cr.id FROM current_relation_members crm,current_relations cr + WHERE crm.member_id=#{objid} + AND crm.member_type='#{type}' + AND crm.id=cr.id + AND cr.visible=1 + EOF + + relways=ActiveRecord::Base.connection.select_all(sql) + relways.each do |a| + removefromrelation(objid,type,a['id'],uid,db_now) + end + end + + def removefromrelation(objid,type,relation,uid,db_now) #:doc: + rver=ActiveRecord::Base.connection.insert("INSERT INTO relations (id,user_id,timestamp,visible) VALUES (#{relation},#{uid},#{db_now},1)") + + tagsql=<<-EOF + INSERT INTO relation_tags (id,k,v,version) + SELECT id,k,v,#{rver} FROM current_relation_tags + WHERE id=#{relation} + EOF + ActiveRecord::Base.connection.insert(tagsql) + + membersql=<<-EOF + INSERT INTO relation_members (id,member_type,member_id,member_role,version) + SELECT id,member_type,member_id,member_role,#{rver} FROM current_relation_members + WHERE id=#{relation} + AND (member_id!=#{objid} OR member_type!='#{type}') + EOF + ActiveRecord::Base.connection.insert(membersql) + + ActiveRecord::Base.connection.update("UPDATE current_relations SET user_id=#{uid},timestamp=#{db_now} WHERE id=#{relation}") + ActiveRecord::Base.connection.execute("DELETE FROM current_relation_members WHERE id=#{relation} AND member_type='#{type}' AND member_id=#{objid}") + end + + def sqlescape(a) #:doc: + a.gsub(/[\000-\037]/,"").gsub("'","''").gsub(92.chr) {92.chr+92.chr} + end + + def tag2array(a) #:doc: + tags={} + Tags.split(a) do |k, v| + tags[k.gsub(':','|')]=v + end + tags + end + + def array2tag(a) #:doc: + tags = [] + a.each do |k,v| + if v=='' then next end + if v[0,6]=='(type ' then next end + tags << [k.gsub('|',':'), v] + end + return Tags.join(tags) + end + + def getuserid(token) #:doc: + if (token =~ /^(.+)\+(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end + + return user ? user.id : nil; + end + + # ==================================================================== + # Co-ordinate conversion + + def lat2coord(a,basey,masterscale) #:doc: + -(lat2y(a)-basey)*masterscale + end + + def long2coord(a,baselong,masterscale) #:doc: + (a-baselong)*masterscale + end + + def lat2y(a) #:doc: + 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) + end + + def coord2lat(a,masterscale,basey) #:doc: + y2lat(a/-masterscale+basey) + end + + def coord2long(a,masterscale,baselong) #:doc: + a/masterscale+baselong + end + + def y2lat(a) + 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) + end end