X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/e5a5f957ef46d76ec78e2c0450b50a086dff82b6..e18c33f733007e898786ee63c7f40a854b4772c6:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 38c567734..51e49849f 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,319 +1,603 @@ +# 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"). + class AmfController < ApplicationController require 'stringio' - # Still to do: - # - all db interaction - # - user authentication - # - (also pass lat/lon through from view tab to edit tab) - -# to log: -# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") + include Potlatch + session :off + before_filter :check_write_availability - # ==================================================================== - # Main AMF handler + # Main AMF handler: processes the raw AMF string (using AMF library) and + # calls each action (private method) accordingly. - # ---- 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 + 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=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 # | + 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=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 + 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 '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 'findrelations'; results[index]=AMF.putdata(index,findrelations(*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)) + 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 + 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 + private + + # Return presets (default tags, localisation etc.): + # uses POTLATCH_PRESETS global, set up in OSM::Potlatch. + + def getpresets() #:doc: + return POTLATCH_PRESETS end + # 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. - # ==================================================================== - # 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]=$2 end - } - end - } - end - [presets,presetmenus,presetnames] - end + def whichways(xmin, ymin, xmax, ymax) #:doc: + xmin -= 0.01; ymin -= 0.01 + xmax += 0.01; ymax += 0.01 + + if POTLATCH_USE_SQL then + way_ids = sql_find_way_ids_in_area(xmin, ymin, xmax, ymax) + points = sql_find_pois_in_area(xmin, ymin, xmax, ymax) + relation_ids = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, way_ids) + else + # find the way ids in an area + nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => "current_nodes.visible = 1", :include => :ways) + way_ids = nodes_in_area.collect { |node| node.way_ids }.flatten.uniq - def whichways(args) - waylist=WaySegment.find_by_sql("SELECT DISTINCT current_way_segments.id AS wayid"+ - " FROM current_way_segments,current_segments,current_nodes "+ - " WHERE segment_id=current_segments.id "+ - " AND node_a=current_nodes.id "+ - " AND (latitude BETWEEN "+(args[1].to_f-0.01).to_s+" AND "+(args[3].to_f+0.01).to_s+") "+ - " AND (longitude BETWEEN "+(args[0].to_f-0.01).to_s+" AND "+(args[2].to_f+0.01).to_s+")") - ways=[] - waylist.each {|a| - ways< "visible = 1") + + Relation.find_for_ways(way_ids, :conditions => "visible = 1") + relation_ids = relations.collect { |relation| relation.id }.uniq end - - def getway(args) - objname,wayid,$baselong,$basey,$masterscale=args - wayid=wayid.to_i - points=[] - lastid=-1 - xmin=999999; xmax=-999999 - ymin=999999; ymax=-999999 - -RAILS_DEFAULT_LOGGER.error("Looking for way #{wayid}") - nodelist=ActiveRecord::Base.connection.select_all "SELECT n1.latitude AS lat1,n1.longitude AS long1,n1.id AS id1,n1.tags as tags1, "+ - " n2.latitude AS lat2,n2.longitude AS long2,n2.id AS id2,n2.tags as tags2,segment_id "+ - " FROM current_way_segments,current_segments,current_nodes AS n1,current_nodes AS n2 "+ - " WHERE current_way_segments.id=#{wayid} "+ - " AND segment_id=current_segments.id "+ - " AND n1.id=node_a and n2.id=node_b "+ - " ORDER BY sequence_id" - nodelist.each {|row| - xs1=long2coord(row['long1'].to_f); ys1=lat2coord(row['lat1'].to_f) - xs2=long2coord(row['long2'].to_f); ys2=lat2coord(row['lat2'].to_f) - if (row['id1'].to_i!=lastid) - points<<[xs1,ys1,row['id1'].to_i,0,tag2array(row['tags1']),0] - end - lastid=row['id2'].to_i - points<<[xs2,ys2,row['id2'].to_i,1,tag2array(row['tags2']),row['segment_id'].to_i] - xmin=[xmin,row['long1'].to_f,row['long2'].to_f].min - xmax=[xmax,row['long1'].to_f,row['long2'].to_f].max - ymin=[ymin,row['lat1'].to_f,row['lat2'].to_f].min - ymax=[ymax,row['lat1'].to_f,row['lat2'].to_f].max - } - - attributes={} - attrlist=ActiveRecord::Base.connection.select_all "SELECT k,v FROM current_way_tags WHERE id=#{wayid}" - attrlist.each {|a| attributes[a['k']]=a['v'] } - -RAILS_DEFAULT_LOGGER.error("Way #{wayid} #{xmin},#{xmax},#{ymin},#{ymax}") - [objname,points,attributes,xmin,xmax,ymin,ymax] + + [way_ids, points, relation_ids] + end + + # 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 + + # 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| + [node.lon, node.lat, node.id, nil, node.tags_as_hash] + end + tags = way.tags end - - def putway(args) - # to do + + [wayid, points, tags] + 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 - - def deleteway(args) - # to do + + 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 - - # need support functions here too: - # database support functions (readwayquery, createuniquesegments) - # tag2array, array2tag - # getuserid - - def tag2array(a) - tags={} - a.gsub('\;','#%').split(';').each do |b| - b.gsub!('#%',';') - k,v=b.split('=') - tags[k]=v - end - tags + + ['way',wayid,history] + end + + # Find history of a node. Returns 'node', id, and + # an array of previous versions. + + 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 - - # ==================================================================== - # 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 + ['node',nodeid,history] + 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) + + [relid, rel.tags, rel.members] + end + + # 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 - - def getlong(s) - ((s.getc*256+s.getc)*256+s.getc)*256+s.getc + rels + end + + # 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 - - def getstring(s) - len=s.getc*256+s.getc - s.read(len) + + # 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 + + # 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 + + # 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 - def getdouble(s) - a=s.read(8).unpack('G') # G big-endian, E little-endian - a[0] + 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 - - def getarray(s) - len=getlong(s) - arr=[] - for i in (0..len-1) - arr[i]=getvalue(s) - end - arr + + 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 - - def getobject(s) - arr={} - while (key=getstring(s)) - if (key=='') then break end - arr[key]=getvalue(s) + + # -- 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? + savenode = true end - s.getc # skip the 9 'end of object' value - arr + 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 + + # -- Delete any unique nodes - # ----- 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 + uniques.each do |n| + deleteitemrelations(n, 'node') + + node = Node.find(n) + node.user_id = uid + node.visible = false + node.save_with_history! 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) + # -- Save revised way + + way.tags = attributes + way.nds = nodes + way.user_id = uid + way.visible = true + way.save_with_history! + + [0, originalway, way.id, renumberednodes] + 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 encodevalue(n) - case n.class.to_s - when 'Array' - a=10.chr+encodelong(n.length) - n.each do |b| - a+=encodevalue(b) - end - a - when 'Hash' - a=3.chr - n.each do |k,v| - a+=encodestring(k)+encodevalue(v) - end - a+0.chr+0.chr+9.chr - when 'String' - 2.chr+encodestring(n) - when 'Bignum','Fixnum','Float' - 0.chr+encodedouble(n) - when 'NilClass' - 5.chr - else - RAILS_DEFAULT_LOGGER.error("Unexpected Ruby type for AMF conversion: "+n.class.to_s) - end + + 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 + + # 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 - - # ----- 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 + + if n + return [n.id, n.lon, n.lat, n.tags_as_hash] + else + return [nil, nil, nil, ''] end - - def encodedouble(n) - [n].pack('G') + end + + # Delete way and all constituent nodes. Also removes from any relations. + # Returns 0 (success), unchanged way id. + + 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 + + # 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 encodelong(n) - [n].pack('N') + + way.delete_with_relations_and_nodes_and_history(user) + + [0, way_id] + end + + + # ==================================================================== + # Support functions + + # Remove a node or way from all relations + + def deleteitemrelations(objid, type) #:doc: + relations = RelationMember.find(:all, + :conditions => ['member_type = ? and member_id = ?', type, objid], + :include => :relation).collect { |rm| rm.relation }.uniq + + relations.each do |rel| + rel.members.delete_if { |x| x[0] == type and x[1] == objid } + rel.save_with_history! end - - # ==================================================================== - # Co-ordinate conversion - - def lat2coord(a) - -(lat2y(a)-$basey)*$masterscale+250 + end + + # Break out node tags into a hash + # (should become obsolete as of API 0.6) + + def tagstring_to_hash(a) #:doc: + tags={} + Tags.split(a) do |k, v| + tags[k]=v end - - def long2coord(a) - (a-$baselong)*$masterscale+350 + tags + end + + # Authenticate token + # (could be removed if no-one uses the username+password form) + + def getuserid(token) #:doc: + if (token =~ /^(.+)\+(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) end + + return user ? user.id : nil; + end + + # Compare two floating-point numbers to within 0.0000001 + + def fpcomp(a,b) #:doc: + return ((a/0.0000001).round==(b/0.0000001).round) + end + + + # ==================================================================== + # Alternative SQL queries for getway/whichways + + def sql_find_way_ids_in_area(xmin,ymin,xmax,ymax) + sql=<<-EOF + SELECT DISTINCT current_way_nodes.id AS wayid + FROM current_way_nodes + INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id + INNER JOIN current_ways ON current_ways.id =current_way_nodes.id + WHERE current_nodes.visible=1 + AND current_ways.visible=1 + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + EOF + return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['wayid'].to_i } + end - def lat2y(a) - 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) - end + def sql_find_pois_in_area(xmin,ymin,xmax,ymax) + sql=<<-EOF + SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.tags + FROM current_nodes + LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id + WHERE current_nodes.visible=1 + AND cwn.id IS NULL + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + EOF + return ActiveRecord::Base.connection.select_all(sql).collect { |n| [n['id'].to_i,n['lon'].to_f,n['lat'].to_f,tagstring_to_hash(n['tags'])] } + end - def coord2lat(a) - y2lat((a-250)/-$masterscale+$basey) + def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids) + # ** It would be more Potlatchy to get relations for nodes within ways + # during 'getway', not here + sql=<<-EOF + SELECT DISTINCT cr.id AS relid + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node' + WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")} + EOF + unless way_ids.empty? + sql+=<<-EOF + UNION + SELECT DISTINCT cr.id AS relid + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + WHERE crm.member_type='way' + AND crm.member_id IN (#{way_ids.join(',')}) + EOF end + return ActiveRecord::Base.connection.select_all(sql).collect { |a| a['relid'].to_i }.uniq + end - def coord2long(a) - (a-350)/$masterscale+$baselong + 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 y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) + 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 + +# Local Variables: +# indent-tabs-mode: t +# tab-width: 4 +# End: