X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/d6465302066e4d16ef43c0df1f289c040269ce78..6c66507427961a22a8f282b5b2f4ab7fda1dad6f:/app/controllers/amf_controller.rb

diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb
index 936dcbe1b..d729fdd45 100644
--- a/app/controllers/amf_controller.rb
+++ b/app/controllers/amf_controller.rb
@@ -27,7 +27,10 @@
 #	return(-1,"message")		<-- just puts up a dialogue
 #	return(-2,"message")		<-- also asks the user to e-mail me
 # 
-# To write to the Rails log, use RAILS_DEFAULT_LOGGER.info("message").
+# To write to the Rails log, use logger.info("message").
+
+# Remaining issues:
+# * version conflict when POIs and ways are reverted
 
 class AmfController < ApplicationController
   require 'stringio'
@@ -38,7 +41,7 @@ class AmfController < ApplicationController
   include MapBoundary
 
   session :off
-  before_filter :check_write_availability
+  before_filter :check_api_writable
 
   # Main AMF handlers: process the raw AMF string (using AMF library) and
   # calls each action (private method) accordingly.
@@ -52,7 +55,7 @@ class AmfController < ApplicationController
 
     # Parse request
 
-    headers=AMF.getint(req)					# Read number of headers
+	headers=AMF.getint(req)					# Read number of headers
 
     headers.times do						# Read each header
       name=AMF.getstring(req)				#  |
@@ -67,15 +70,16 @@ class AmfController < ApplicationController
       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)
-      logger.info "Executing AMF #{message}:#{index}"
+      logger.info("Executing AMF #{message}:#{index}")
 
       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 'getway';				r=AMF.putdata(index,getway(args[0].to_i))
+                                    results[index]=r
         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_old';			results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
         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 'findgpx';				results[index]=AMF.putdata(index,findgpx(*args))
@@ -109,6 +113,7 @@ class AmfController < ApplicationController
       bytes=AMF.getlong(req)				#  | get total size in bytes
       args=AMF.getvalue(req)				#  | get response (probably an array)
 
+      logger.info("Executing AMF #{message}:#{index}")
       case message
         when 'putway';				r=putway(renumberednodes,*args)
 									renumberednodes=r[3]
@@ -122,6 +127,7 @@ class AmfController < ApplicationController
         when 'startchangeset';		results[index]=AMF.putdata(index,startchangeset(*args))
       end
     end
+    logger.info("encoding AMF results")
     sendresponse(results)
   end
 
@@ -130,7 +136,7 @@ class AmfController < ApplicationController
   # Start new changeset
   
   def startchangeset(usertoken, cstags, closeid, closecomment)
-    user = getuserid(usertoken)
+    user = getuser(usertoken)
     if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
 
     # close previous changeset and add comment
@@ -152,8 +158,8 @@ class AmfController < ApplicationController
     cs.tags = cstags
     cs.user_id = user.id
     # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
-    cs.created_at = Time.now
-    cs.closed_at = Time.new + Changeset::IDLE_TIMEOUT
+    cs.created_at = Time.now.getutc
+    cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
     cs.save_with_tags!
     return [0,cs.id]
   end
@@ -180,8 +186,9 @@ class AmfController < ApplicationController
   # used in any way, rel is any relation which refers to either a way
   # or node that we're returning.
   def whichways(xmin, ymin, xmax, ymax) #:doc:
-    xmin -= 0.01; ymin -= 0.01
-    xmax += 0.01; ymax += 0.01
+    enlarge = [(xmax-xmin)/8,0.01].min
+    xmin -= enlarge; ymin -= enlarge
+    xmax += enlarge; ymax += enlarge
     
     # check boundary is sane and area within defined
     # see /config/application.yml
@@ -202,7 +209,7 @@ class AmfController < ApplicationController
 
       # 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, n.version] }
+      points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
 
       # find the relations used by those nodes and ways
       relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
@@ -210,7 +217,7 @@ class AmfController < ApplicationController
       relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
     end
 
-    [0,ways, points, relations]
+    [0, ways, points, relations]
 
   rescue Exception => err
     [-2,"Sorry - I can't get the map for that area."]
@@ -220,8 +227,9 @@ class AmfController < ApplicationController
   # 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
+    enlarge = [(xmax-xmin)/8,0.01].min
+    xmin -= enlarge; ymin -= enlarge
+    xmax += enlarge; ymax += enlarge
 
     # check boundary is sane and area within defined
     # see /config/application.yml
@@ -242,9 +250,9 @@ class AmfController < ApplicationController
 
   def getway(wayid) #:doc:
     if POTLATCH_USE_SQL then
-      points = sql_get_nodes_in_way(wayid)
-      tags = sql_get_tags_in_way(wayid)
-      version = sql_get_way_version(wayid)
+        points = sql_get_nodes_in_way(wayid)
+        tags = sql_get_tags_in_way(wayid)
+        version = sql_get_way_version(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
@@ -269,7 +277,7 @@ class AmfController < ApplicationController
 
     [wayid, points, tags, version]
   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, 
@@ -284,74 +292,118 @@ class AmfController < ApplicationController
   # 3. hash of tags, 
   # 4. version, 
   # 5. is this the current, visible version? (boolean)
-
-  def getway_old(id, version) #:doc:
-    if version < 0
+  
+  def getway_old(id, timestamp) #:doc:
+    if timestamp == ''
+      # undelete
       old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
       points = old_way.get_nodes_undelete unless old_way.nil?
     else
-      old_way = OldWay.find(:first, :conditions => ['id = ? AND version = ?', id, version])
-      points = old_way.get_nodes_revert unless old_way.nil?
+      begin
+        # revert
+        timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
+        old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
+        unless old_way.nil?
+          points = old_way.get_nodes_revert(timestamp)
+          if !old_way.visible
+            return [-1, "Sorry, the way was deleted at that time - please revert to a previous version."]
+          end
+        end
+      rescue ArgumentError
+        # thrown by date parsing method. leave old_way as nil for
+        # the superb error handler below.
+      end
     end
 
     if old_way.nil?
+      # *** FIXME: shouldn't this be returning an error?
       return [-1, id, [], {}, -1,0]
     else
       curway=Way.find(id)
       old_way.tags['history'] = "Retrieved from v#{old_way.version}"
-      return [0, id, points, old_way.tags, old_way.version, (curway.version==old_way.version and curway.visible)]
+      return [0, id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
     end
   end
   
-  # Find history of a way. Returns 'way', id, and 
-  # an array of previous versions.
+  # Find history of a way.
+  # Returns 'way', id, and an array of previous versions:
+  # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
+  # - now [timestamp,user,uid]
+  #
+  # Heuristic: Find all nodes that have ever been part of the way; 
+  # get a list of their revision dates; add revision dates of the way;
+  # sort and collapse list (to within 2 seconds); trim all dates before the 
+  # start date of the way.
 
   def getway_history(wayid) #:doc:
+
     begin
-      history = Way.find(wayid).old_ways.reverse.collect do |old_way|
-        user_object = old_way.changeset.user
-        user = user_object.data_public? ? user_object.display_name : 'anonymous'
-        uid  = user_object.data_public? ? user_object.id : 0
-        [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
+      # Find list of revision dates for way and all constituent nodes
+      revdates=[]
+      revusers={}
+      Way.find(wayid).old_ways.collect do |a|
+        revdates.push(a.timestamp)
+        unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
+        a.nds.each do |n|
+          Node.find(n).old_nodes.collect do |o|
+            revdates.push(o.timestamp)
+            unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
+          end
+        end
       end
-
-      return ['way',wayid,history]
+      waycreated=revdates[0]
+      revdates.uniq!
+      revdates.sort!
+	  revdates.reverse!
+
+      # Remove any dates (from nodes) before first revision date of way
+      revdates.delete_if { |d| d<waycreated }
+      # Remove any elements where 2 seconds doesn't elapse before next one
+      revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
+      # Collect all in one nested array
+      revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
+
+      return ['way',wayid,revdates]
     rescue ActiveRecord::RecordNotFound
       return ['way', wayid, []]
     end
   end
-
-  # Find history of a node. Returns 'node', id, and 
-  # an array of previous versions.
+  
+  # Find history of a node. Returns 'node', id, and an array of previous versions as above.
 
   def getnode_history(nodeid) #:doc:
-    history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
-      user_object = old_node.changeset.user
-      user = user_object.data_public? ? user_object.display_name : 'anonymous'
-      uid  = user_object.data_public? ? user_object.id : 0
-      [old_node.version, old_node.timestamp.strftime("%d %b %Y, %H:%M"), old_node.visible ? 1 : 0, user, uid]
+    begin 
+      history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
+        [old_node.timestamp.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
+      end
+      return ['node', nodeid, history]
+    rescue ActiveRecord::RecordNotFound
+      return ['node', nodeid, []]
     end
-    
-    return ['node',nodeid,history]
-  rescue ActiveRecord::RecordNotFound
-    return ['node', nodeid, []]
+  end
+
+  def change_user(obj)
+    user_object = obj.changeset.user
+    user = user_object.data_public? ? user_object.display_name : 'anonymous'
+    uid  = user_object.data_public? ? user_object.id : 0
+    [user,uid]
   end
 
   # Find GPS traces with specified name/id.
   # Returns array listing GPXs, each one comprising id, name and description.
   
   def findgpx(searchterm, usertoken)
-    uid = getuserid(usertoken)
+    user = getuser(usertoken)
     if !uid then return -1,"You must be logged in to search for GPX traces." end
 
     gpxs = []
     if searchterm.to_i>0 then
-      gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,uid] )
+      gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
       if gpx then
         gpxs.push([gpx.id, gpx.name, gpx.description])
       end
     else
-      Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,uid,searchterm] ).each do |gpx|
+      Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
       gpxs.push([gpx.id, gpx.name, gpx.description])
 	  end
 	end
@@ -400,10 +452,11 @@ class AmfController < ApplicationController
   # Returns
   # 0. 0 (success),
   # 1. original relation id (unchanged),
-  # 2. new relation id.
+  # 2. new relation id,
+  # 3. version.
 
-  def putrelation(renumberednodes, renumberedways, usertoken, changeset, version, relid, tags, members, visible) #:doc:
-    user = getuserid(usertoken)
+  def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
+    user = getuser(usertoken)
     if !user then return -1,"You are not logged in, so the relation could not be saved." end
 
     relid = relid.to_i
@@ -424,8 +477,8 @@ class AmfController < ApplicationController
       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'
+          mid = renumberednodes[mid] if m[0] == 'Node'
+          mid = renumberedways[mid] if m[0] == 'Way'
         end
         if mid
           typedmembers << [m[0], mid, m[2]]
@@ -436,11 +489,10 @@ class AmfController < ApplicationController
       new_relation.members = typedmembers
       new_relation.tags = tags
       new_relation.visible = visible
-      new_relation.changeset_id = changeset
+      new_relation.changeset_id = changeset_id
       new_relation.version = version
 
-
-      if id <= 0
+      if relid <= 0
         # We're creating the node
         new_relation.create_with_history(user)
       elsif visible
@@ -452,30 +504,30 @@ class AmfController < ApplicationController
       end
     end # transaction
       
-    if id <= 0
+    if relid <= 0
       return [0, relid, new_relation.id, new_relation.version]
     else
-      return [0, relid, relation.id, relation.version]
+      return [0, relid, relid, relation.version]
     end
   rescue OSM::APIChangesetAlreadyClosedError => ex
-    return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"]
+    return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}."]
   rescue OSM::APIVersionMismatchError => ex
     # Really need to check to see whether this is a server load issue, and the 
     # last version was in the same changeset, or belongs to the same user, then
     # we can return something different
-    return [-3, "You have taken too long to edit, please reload the area"]
+    return [-3, "Sorry, someone else has changed this relation since you started editing. Please click the 'Edit' tab to reload the area."]
   rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The object has already been deleted"]
+    return [-1, "The relation has already been deleted."]
   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
-    return [-2, "Something really bad happened :-()"]
+    return [-2, "An unusual error happened (in 'putrelation' #{relid})."]
   end
 
   # Save a way to the database, including all nodes. Any nodes in the previous
   # version and no longer used are deleted.
   # 
   # Parameters:
-  # 0. hash of renumbered nodes
+  # 0. hash of renumbered nodes (added by amf_controller)
   # 1. current user token (for authentication)
   # 2. current changeset
   # 3. new way version
@@ -492,7 +544,7 @@ class AmfController < ApplicationController
   # 4. way version,
   # 5. hash of node versions (node=>version)
 
-  def putway(renumberednodes, usertoken, changeset, version, originalway, pointlist, attributes, nodes) #:doc:
+  def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes) #:doc:
 
     # -- Initialise
 	
@@ -501,6 +553,10 @@ class AmfController < ApplicationController
     if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
 
     originalway = originalway.to_i
+	pointlist.collect! {|a| a.to_i }
+
+    way=nil	# this is returned, so scope it outside the transaction
+    nodeversions = {}
     Way.transaction do
 
       # -- Get unique nodes
@@ -514,7 +570,6 @@ class AmfController < ApplicationController
 
       #-- Update each changed node
 
-      nodeversions = {}
       nodes.each do |a|
         lon = a[0].to_f
         lat = a[1].to_f
@@ -525,7 +580,7 @@ class AmfController < ApplicationController
         if renumberednodes[id] then id = renumberednodes[id] end
 
         node = Node.new
-        node.changeset_id = changeset
+        node.changeset_id = changeset_id
         node.lat = lat
         node.lon = lon
         node.tags = a[4]
@@ -535,39 +590,44 @@ class AmfController < ApplicationController
           # We're creating the node
           node.create_with_history(user)
           renumberednodes[id] = node.id
-          nodeversions[id] = node.version
+          nodeversions[node.id] = node.version
         else
           # We're updating an existing node
           previous=Node.find(id)
           previous.update_from(node, user)
-          nodeversions[id] = previous.version
+          nodeversions[previous.id] = previous.version
         end
       end
 
-      # -- Delete any unique nodes no longer used
-
-      uniques=uniques-pointlist
-      uniques.each do |n|
-        node = Node.find(n)
-        new_node = Node.new
-        new_node.changeset_id = changeset
-        new_node.version = version
-        node.delete_with_history!(new_node, user)
-      end
-
       # -- Save revised way
 
+	  pointlist.collect! {|a|
+		renumberednodes[a] ? renumberednodes[a]:a
+	  } # renumber nodes
       new_way = Way.new
       new_way.tags = attributes
       new_way.nds = pointlist
-      new_way.changeset_id = changeset
-      new_way.version = version
+      new_way.changeset_id = changeset_id
+      new_way.version = wayversion
       if originalway <= 0
         new_way.create_with_history(user)
         way=new_way	# so we can get way.id and way.version
       elsif way.tags!=attributes or way.nds!=pointlist or !way.visible?
         way.update_from(new_way, user)
       end
+
+      # -- Delete any unique nodes no longer used
+
+      uniques=uniques-pointlist
+      uniques.each do |n|
+        node = Node.find(n)
+        deleteitemrelations(user, changeset_id, id, 'Node', node.version)
+        new_node = Node.new
+        new_node.changeset_id = changeset_id
+        new_node.version = node.version
+        node.delete_with_history!(new_node, user)
+      end
+
     end # transaction
 
     [0, originalway, way.id, renumberednodes, way.version, nodeversions]
@@ -577,14 +637,14 @@ class AmfController < ApplicationController
     # Really need to check to see whether this is a server load issue, and the 
     # last version was in the same changeset, or belongs to the same user, then
     # we can return something different
-    return [-3, "Sorry, someone else has changed this way since you started editing - please reload the area"]
+    return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
   rescue OSM::APITooManyWayNodesError => ex
     return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed."]
   rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The object has already been deleted."]
+    return [-1, "The point has already been deleted."]
   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
-    return [-2, "Something really bad happened :-(."]
+    return [-2, "An unusual error happened (in 'putway' #{originalway})."]
   end
 
   # Save POI to the database.
@@ -595,7 +655,7 @@ class AmfController < ApplicationController
   # 2. new node id,
   # 3. version.
 
-  def putpoi(usertoken, changeset, version, id, lon, lat, tags, visible) #:doc:
+  def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
     user = getuser(usertoken)
     if !user then return -1,"You are not logged in, so the point could not be saved." end
 
@@ -609,13 +669,12 @@ class AmfController < ApplicationController
 
         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
       end
       # We always need a new node, based on the data that has been sent to us
       new_node = Node.new
 
-      new_node.changeset_id = changeset
+      new_node.changeset_id = changeset_id
       new_node.version = version
       new_node.lat = lat
       new_node.lon = lon
@@ -643,12 +702,12 @@ class AmfController < ApplicationController
     # Really need to check to see whether this is a server load issue, and the 
     # last version was in the same changeset, or belongs to the same user, then
     # we can return something different
-    return [-3, "You have taken too long to edit, please reload the area"]
+    return [-3, "Sorry, someone else has changed this point since you started editing. Please click the 'Edit' tab to reload the area."]
   rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The object has already been deleted"]
+    return [-1, "The point has already been deleted"]
   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
-    return [-2, "Something really bad happened :-()"]
+    return [-2, "An unusual error happened (in 'putpoi' #{id})."]
   end
 
   # Read POI from database
@@ -656,11 +715,11 @@ class AmfController < ApplicationController
   #
   # Returns array of id, long, lat, hash of tags, version.
 
-  def getpoi(id,version) #:doc:
-    if version>0 then
-        n = OldNode.find(id, :conditions=>['version=?',version])
-    else
+  def getpoi(id,timestamp) #:doc:
+    if timestamp == '' then
       n = Node.find(id)
+    else
+      n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
     end
 
     if n
@@ -688,27 +747,29 @@ class AmfController < ApplicationController
     # Need a transaction so that if one item fails to delete, the whole delete fails.
     Way.transaction do
 
-      # FIXME: would be good not to make two history entries when removing
-      #		 two nodes from the same relation
+      # delete the way
       old_way = Way.find(way_id)
-      #old_way.unshared_node_ids.each do |n|
-      #  deleteitemrelations(n, 'node')
-      #end
-      #deleteitemrelations(way_id, 'way')
-
-   
-      #way.delete_with_relations_and_nodes_and_history(changeset_id.to_i)
-      old_way.unshared_node_ids.each do |node_id|
+      u = old_way.unshared_node_ids
+      delete_way = Way.new
+      delete_way.version = way_version
+      delete_way.changeset_id = changeset_id
+      old_way.delete_with_history!(delete_way, user)
+
+      u.each do |node_id|
         # delete the node
         node = Node.find(node_id)
         delete_node = Node.new
-        delete_node.version = node_id_version[node_id]
+        delete_node.changeset_id = changeset_id
+        if node_id_version[node_id.to_s]
+          delete_node.version = node_id_version[node_id.to_s]
+        else
+          # in case the node wasn't passed (i.e. if it was previously removed
+          # from the way in Potlatch)
+          deleteitemrelations(user, changeset_id, node_id, 'Node', node.version)
+	      delete_node.version = node.version
+	    end
         node.delete_with_history!(delete_node, user)
       end
-      # delete the way
-      delete_way = Way.new
-      delete_way.version = way_version
-      old_way.delete_with_history!(delete_way, user)
     end # transaction
     [0, way_id]
   rescue OSM::APIChangesetAlreadyClosedError => ex
@@ -717,52 +778,38 @@ class AmfController < ApplicationController
     # Really need to check to see whether this is a server load issue, and the 
     # last version was in the same changeset, or belongs to the same user, then
     # we can return something different
-    return [-3, "You have taken too long to edit, please reload the area"]
+    return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
   rescue OSM::APIAlreadyDeletedError => ex
-    return [-1, "The object has already been deleted"]
+    return [-1, "The way has already been deleted."]
   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
-    return [-2, "Something really bad happened :-()"]
+    return [-2, "An unusual error happened (in 'deleteway' #{way_id})."]
   end
 
 
   # ====================================================================
   # Support functions
 
-  # delete a way and its nodes that aren't part of other ways
-  # this functionality used to be in the model, however it is specific to amf
-  # controller
-  #def delete_unshared_nodes(changeset_id, way_id)
-  
   # Remove a node or way from all relations
-  # FIXME needs version, changeset, and user
-  # Fixme make sure this doesn't depend on anything and delete this, as potlatch 
-  # itself should remove the relations first
-  def deleteitemrelations(objid, type, version) #:doc:
+  # This is only used by putway and deleteway when deleting nodes removed 
+  # from a way (because Potlatch itself doesn't keep track of these - 
+  # possible FIXME).
+
+  def deleteitemrelations(user, changeset_id, objid, type, version) #:doc:
     relations = RelationMember.find(:all, 
-									:conditions => ['member_type = ? and member_id = ?', type, objid], 
+									:conditions => ['member_type = ? and member_id = ?', type.classify, objid], 
 									:include => :relation).collect { |rm| rm.relation }.uniq
 
     relations.each do |rel|
       rel.members.delete_if { |x| x[0] == type and x[1] == objid }
-      # FIXME need to create the new relation
       new_rel = Relation.new
-      new_rel.version = version
-      new_rel.members = members
-      new_rel.changeset = changeset
-      rel.delete_with_history(new_rel, user)
-    end
-  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
+      new_rel.tags = rel.tags
+      new_rel.visible = rel.visible
+      new_rel.version = rel.version
+      new_rel.members = rel.members
+      new_rel.changeset_id = changeset_id
+      rel.update_from(new_rel, user)
     end
-    tags
   end
 
   # Authenticate token
@@ -778,17 +825,6 @@ class AmfController < ApplicationController
     end
     return user
   end
-  
-  def getuserid(token)
-    user = getuser(token)
-    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
 
   # Send AMF response
   
@@ -849,7 +885,7 @@ class AmfController < ApplicationController
       SELECT DISTINCT cr.id AS relid,cr.version AS version 
       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' 
+      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?
@@ -858,17 +894,17 @@ class AmfController < ApplicationController
         SELECT DISTINCT cr.id AS relid,cr.version AS version
         FROM current_relations cr
         INNER JOIN current_relation_members crm ON crm.id=cr.id
-         WHERE crm.member_type='way' 
+         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,a['version'].to_i] }
+    ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
   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 
+      SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version 
       FROM current_way_nodes,current_nodes 
        WHERE current_way_nodes.id=#{wayid.to_i} 
 		   AND current_way_nodes.node_id=current_nodes.id 
@@ -881,7 +917,7 @@ class AmfController < ApplicationController
         nodetags[n['k']]=n['v']
       end
       nodetags.delete('created_by')
-      points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags]
+      points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags,row['version'].to_i]
     end
     points
   end