Give the API error handler a generic rescue that returns 500 with

[rails.git] / app / controllers / amf_controller.rb

diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb
index 331487a93debee39e91820cbdac768c9170235f5..18ecb13231f8b36a561bc3c872aefaa7b36e050d 100644 (file)
--- a/app/controllers/amf_controller.rb
+++ b/app/controllers/amf_controller.rb
@@ -24,8 +24,11 @@
 # == Debugging
 # 
 # Any method that returns a status code (0 for ok) can also send:
 # == 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
+#      return(-1,"message")            <-- just puts up a dialogue
+#      return(-2,"message")            <-- also asks the user to e-mail me
+# return(-3,["type",v],id)    <-- version conflict
+# return(-4,"type",id)        <-- object not found
+# -5 indicates the method wasn't called (due to a previous error)

 # 
 # To write to the Rails log, use logger.info("message").
 
 # 
 # To write to the Rails log, use logger.info("message").
 


@@ -41,100 +44,116 @@ class AmfController < ApplicationController
   include MapBoundary
 
   session :off
   include MapBoundary
 
   session :off

-  before_filter :check_write_availability
+  before_filter :check_api_writable
+  around_filter :api_call_timeout, :only => [:amf_read]

 
   # 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
 
   # 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
+    if request.post?
+      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
+      # 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)                          #  |
-      req.getc                                                         #  | skip boolean
-      value=AMF.getvalue(req)                          #  |
-      header["name"]=value                                     #  |
-    end
+      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)
-      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 '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]))
-        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))
-        when 'findrelations';          results[index]=AMF.putdata(index,findrelations(*args))
-        when 'getpoi';                         results[index]=AMF.putdata(index,getpoi(*args))
+      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)
+        logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
+
+        case message
+          when 'getpresets';             results[index]=AMF.putdata(index,getpresets(args[0]))
+          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]))
+          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))
+          when 'findrelations';                results[index]=AMF.putdata(index,findrelations(*args))
+          when 'getpoi';                     results[index]=AMF.putdata(index,getpoi(*args))
+        end

       end
       end

+      logger.info("Encoding AMF results")
+      sendresponse(results)
+    else
+      render :nothing => true, :status => :method_not_allowed

     end
     end

-    logger.info("encoding AMF results")
-    sendresponse(results)

   end
 
   def amf_write
   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
+    if request.post?
+      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)
-
-      logger.info("Executing AMF #{message}:#{index}")
-      case message
-        when 'putway';                         r=putway(renumberednodes,*args)
-                                                                       renumberednodes=r[3]
-                                                                       if r[1] != r[2] then 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))
-        when 'putpoi';                         r=putpoi(*args)
-                                                                       if r[1] != r[2] then renumberednodes[r[1]] = r[2] end
-                                                               results[index]=AMF.putdata(index,r)
-        when 'startchangeset';         results[index]=AMF.putdata(index,startchangeset(*args))
+      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)
+        err=false                   # Abort batch on error
+
+        logger.info("Executing AMF #{message}:#{index}")
+        if err
+          results[index]=[-5,nil]
+        else
+          case message
+            when 'putway';                       r=putway(renumberednodes,*args)
+                                                               renumberednodes=r[4]
+                                                               if r[2] != r[3] then renumberedways[r[2]] = r[3] 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))
+            when 'putpoi';                       r=putpoi(*args)
+                                                               if r[2] != r[3] then renumberednodes[r[2]] = r[3] end
+                                                       results[index]=AMF.putdata(index,r)
+            when 'startchangeset';results[index]=AMF.putdata(index,startchangeset(*args))
+          end
+          if results[index][0]==-3 then err=true end  # If a conflict is detected, don't execute any more writes
+        end

       end
       end

+      logger.info("Encoding AMF results")
+      sendresponse(results)
+    else
+      render :nothing => true, :status => :method_not_allowed

     end
     end

-    logger.info("encoding AMF results")
-    sendresponse(results)

   end
 
   private
 
   # Start new changeset
   end
 
   private
 
   # Start new changeset

+  # Returns success_code,success_message,changeset id

   
   

-  def startchangeset(usertoken, cstags, closeid, closecomment)
+  def startchangeset(usertoken, cstags, closeid, closecomment, opennew)

     user = getuser(usertoken)
     if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
 
     user = getuser(usertoken)
     if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
 


@@ -143,7 +162,7 @@ class AmfController < ApplicationController
       cs = Changeset.find(closeid)
       cs.set_closed_time_now
       if cs.user_id!=user.id
       cs = Changeset.find(closeid)
       cs.set_closed_time_now
       if cs.user_id!=user.id

-        return -2,"You cannot close that changeset because you're not the person who opened it."
+        return -2,"You cannot close that changeset because you're not the person who opened it.",nil

       elsif closecomment.empty?
         cs.save!
       else
       elsif closecomment.empty?
         cs.save!
       else


@@ -153,21 +172,38 @@ class AmfController < ApplicationController
     end
        
     # open a new changeset
     end
        
     # open a new changeset

-    cs = Changeset.new
-    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 = cs.created_at + Changeset::IDLE_TIMEOUT
-    cs.save_with_tags!
-    return [0,cs.id]
+    if opennew!=0
+      cs = Changeset.new
+      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.getutc
+      cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
+      cs.save_with_tags!
+      return [0,'',cs.id]
+    else
+      return [0,'',nil]
+    end

   end
 
   # Return presets (default tags, localisation etc.):
   # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
 
   end
 
   # Return presets (default tags, localisation etc.):
   # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
 

-  def getpresets() #:doc:
-    return POTLATCH_PRESETS
+  def getpresets(lang) #:doc:
+       lang.gsub!(/[^\w\-]/,'')
+
+    begin
+      localised = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/localised.yaml"))
+    rescue
+      localised = "" # guess we'll just have to use the hardcoded English text instead
+       end
+
+    begin
+      help = File.read("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/help.html")
+    rescue
+      help = File.read("#{RAILS_ROOT}/config/potlatch/localised/en/help.html")
+    end
+    return POTLATCH_PRESETS+[localised,help]

   end
 
   ##
   end
 
   ##


@@ -176,7 +212,7 @@ class AmfController < ApplicationController
   # are IDs only. 
   #
   # return is of the form: 
   # are IDs only. 
   #
   # return is of the form: 

-  # [error_code, 
+  # [success_code, success_message,

   #  [[way_id, way_version], ...],
   #  [[node_id, lat, lon, [tags, ...], node_version], ...],
   #  [[rel_id, rel_version], ...]]
   #  [[way_id, way_version], ...],
   #  [[node_id, lat, lon, [tags, ...], node_version], ...],
   #  [[rel_id, rel_version], ...]]


@@ -188,7 +224,7 @@ class AmfController < ApplicationController
     enlarge = [(xmax-xmin)/8,0.01].min
     xmin -= enlarge; ymin -= enlarge
     xmax += enlarge; ymax += enlarge
     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
     check_boundaries(xmin, ymin, xmax, ymax)
     # check boundary is sane and area within defined
     # see /config/application.yml
     check_boundaries(xmin, ymin, xmax, ymax)


@@ -216,10 +252,12 @@ class AmfController < ApplicationController
       relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
     end
 
       relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
     end
 

-    [0, ways, points, relations]
+    [0, '', ways, points, relations]

 
 

+  rescue OSM::APITimeoutError => err
+    [-1,"Sorry, I can't get the map for that area - try zooming in further. The server said: #{err}"]

   rescue Exception => err
   rescue Exception => err

-    [-2,"Sorry - I can't get the map for that area."]
+    [-2,"Sorry - I can't get the map for that area. The server said: #{err}",[],[],[] ]

   end
 
   # Find deleted ways in current bounding box (similar to whichways, but ways
   end
 
   # Find deleted ways in current bounding box (similar to whichways, but ways


@@ -235,13 +273,13 @@ class AmfController < ApplicationController
     begin
       check_boundaries(xmin, ymin, xmax, ymax)
     rescue Exception => err
     begin
       check_boundaries(xmin, ymin, xmax, ymax)
     rescue Exception => err

-      return [-2,"Sorry - I can't get the map for that area."]
+      return [-2,"Sorry - I can't get the map for that area. The server said: #{err}",[]]

     end
 
     nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
     way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
 
     end
 
     nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
     way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
 

-    [0,way_ids]
+    [0,'',way_ids]

   end
 
   # Get a way including nodes and tags.
   end
 
   # Get a way including nodes and tags.


@@ -257,13 +295,13 @@ class AmfController < ApplicationController
         # then rails only seems to return the first copy of a node when a
         # way includes a node more than once
         begin
         # then rails only seems to return the first copy of a node when a
         # way includes a node more than once
         begin

-          way = Way.find(wayid)
+          way = Way.find(wayid, :include => { :nodes => :node_tags })

         rescue ActiveRecord::RecordNotFound
         rescue ActiveRecord::RecordNotFound

-          return [wayid,[],{}]
+          return [-4, 'way', wayid, [], {}, nil]

         end
 
         # check case where way has been deleted or doesn't exist
         end
 
         # check case where way has been deleted or doesn't exist

-        return [wayid,[],{}] if way.nil? or !way.visible
+        return [-4, 'way', wayid, [], {}, nil] if way.nil? or !way.visible

 
         points = way.nodes.collect do |node|
         nodetags=node.tags
 
         points = way.nodes.collect do |node|
         nodetags=node.tags


@@ -274,9 +312,9 @@ class AmfController < ApplicationController
       version = way.version
     end
 
       version = way.version
     end
 

-    [wayid, points, tags, version]
+    [0, '', wayid, points, tags, version]

   end
   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, 
   # Get an old version of a way, and all constituent nodes.
   #
   # For undelete (version<0), always uses the most recent version of each node, 


@@ -298,22 +336,28 @@ class AmfController < ApplicationController
       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 => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
       points = old_way.get_nodes_undelete unless old_way.nil?
     else

-      # revert
-      timestamp = DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")
-      old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
-      points = old_way.get_nodes_revert(timestamp) unless old_way.nil?
-      if !old_way.visible
-        return [-1, "Sorry, the way was deleted at that time - please revert to a previous version."]
+      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.", id, [], {}, nil, false]
+          end
+        end
+      rescue ArgumentError
+        # thrown by date parsing method. leave old_way as nil for
+        # the error handler below.

       end
     end
 
     if old_way.nil?
       end
     end
 
     if old_way.nil?

-      # *** FIXME: shouldn't this be returning an error?
-      return [-1, id, [], {}, -1,0]
+      return [-1, "Sorry, the server could not find a way at that time.", id, [], {}, nil, false]

     else
       curway=Way.find(id)
       old_way.tags['history'] = "Retrieved from v#{old_way.version}"
     else
       curway=Way.find(id)
       old_way.tags['history'] = "Retrieved from v#{old_way.version}"

-      return [0, id, points, old_way.tags, curway.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
   
     end
   end
   


@@ -346,7 +390,7 @@ class AmfController < ApplicationController
       waycreated=revdates[0]
       revdates.uniq!
       revdates.sort!
       waycreated=revdates[0]
       revdates.uniq!
       revdates.sort!

-         revdates.reverse!
+      revdates.reverse!

 
       # Remove any dates (from nodes) before first revision date of way
       revdates.delete_if { |d| d<waycreated }
 
       # Remove any dates (from nodes) before first revision date of way
       revdates.delete_if { |d| d<waycreated }


@@ -355,7 +399,7 @@ class AmfController < ApplicationController
       # Collect all in one nested array
       revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
 
       # 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]
+      return ['way', wayid, revdates]

     rescue ActiveRecord::RecordNotFound
       return ['way', wayid, []]
     end
     rescue ActiveRecord::RecordNotFound
       return ['way', wayid, []]
     end


@@ -386,7 +430,7 @@ class AmfController < ApplicationController
   
   def findgpx(searchterm, usertoken)
     user = getuser(usertoken)
   
   def findgpx(searchterm, usertoken)
     user = getuser(usertoken)

-    if !uid then return -1,"You must be logged in to search for GPX traces." end
+    if !uid then return -1,"You must be logged in to search for GPX traces.",[] end

 
     gpxs = []
     if searchterm.to_i>0 then
 
     gpxs = []
     if searchterm.to_i>0 then


@@ -399,7 +443,7 @@ class AmfController < ApplicationController
       gpxs.push([gpx.id, gpx.name, gpx.description])
          end
        end
       gpxs.push([gpx.id, gpx.name, gpx.description])
          end
        end

-    gpxs
+    [0,'',gpxs]

   end
 
   # Get a relation with all tags and members.
   end
 
   # Get a relation with all tags and members.


@@ -413,11 +457,11 @@ class AmfController < ApplicationController
     begin
       rel = Relation.find(relid)
     rescue ActiveRecord::RecordNotFound
     begin
       rel = Relation.find(relid)
     rescue ActiveRecord::RecordNotFound

-      return [relid, {}, []]
+      return [-4, 'relation', relid, {}, [], nil]

     end
 
     end
 

-    return [relid, {}, [], nil] if rel.nil? or !rel.visible
-    [relid, rel.tags, rel.members, rel.version]
+    return [-4, 'relation', relid, {}, [], nil] if rel.nil? or !rel.visible
+    [0, '', relid, rel.tags, rel.members, rel.version]

   end
 
   # Find relations with specified name/id.
   end
 
   # Find relations with specified name/id.


@@ -428,12 +472,12 @@ class AmfController < ApplicationController
     if searchterm.to_i>0 then
       rel = Relation.find(searchterm.to_i)
       if rel and rel.visible then
     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])
+        rels.push([rel.id, rel.tags, rel.members, rel.version])

       end
     else
       RelationTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", searchterm] ).each do |t|
       if t.relation.visible then
       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])
+             rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])

            end
          end
        end
            end
          end
        end


@@ -444,7 +488,8 @@ class AmfController < ApplicationController
   # Returns
   # 0. 0 (success),
   # 1. original relation id (unchanged),
   # 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_id, version, relid, tags, members, visible) #:doc:
     user = getuser(usertoken)
 
   def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
     user = getuser(usertoken)


@@ -468,8 +513,8 @@ class AmfController < ApplicationController
       members.each do |m|
         mid = m[1].to_i
         if mid < 0
       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]]
         end
         if mid
           typedmembers << [m[0], mid, m[2]]


@@ -483,36 +528,35 @@ class AmfController < ApplicationController
       new_relation.changeset_id = changeset_id
       new_relation.version = version
 
       new_relation.changeset_id = changeset_id
       new_relation.version = version
 

-
-      if id <= 0
-        # We're creating the node
+      if relid <= 0
+        # We're creating the relation

         new_relation.create_with_history(user)
       elsif visible
         new_relation.create_with_history(user)
       elsif visible

-        # We're updating the node
+        # We're updating the relation
+        new_relation.id = relid

         relation.update_from(new_relation, user)
       else
         relation.update_from(new_relation, user)
       else

-        # We're deleting the node
+        # We're deleting the relation
+        new_relation.id = relid

         relation.delete_with_history!(new_relation, user)
       end
     end # transaction
       
         relation.delete_with_history!(new_relation, user)
       end
     end # transaction
       

-    if id <= 0
-      return [0, relid, new_relation.id, new_relation.version]
+    if relid <= 0
+      return [0, '', relid, new_relation.id, new_relation.version]

     else
     else

-      return [0, relid, relation.id, relation.version]
+      return [0, '', relid, relid, relation.version]

     end
   rescue OSM::APIChangesetAlreadyClosedError => ex
     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}.", relid, relid, nil]

   rescue OSM::APIVersionMismatchError => ex
   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, "Sorry, someone else has changed this relation since you started editing. Please click the 'Edit' tab to reload the area."]
+    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
+    return [-3, ['relation', a[1]], relid, relid, nil]

   rescue OSM::APIAlreadyDeletedError => ex
   rescue OSM::APIAlreadyDeletedError => ex

-    return [-1, "The relation has already been deleted."]
+    return [-1, "The relation has already been deleted.", relid, relid, nil]

   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
   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}). The server said: #{ex}", relid, relid, nil]

   end
 
   # Save a way to the database, including all nodes. Any nodes in the previous
   end
 
   # Save a way to the database, including all nodes. Any nodes in the previous


@@ -526,7 +570,8 @@ class AmfController < ApplicationController
   # 4. way ID
   # 5. list of nodes in way
   # 6. hash of way tags
   # 4. way ID
   # 5. list of nodes in way
   # 6. hash of way tags

-  # 7. array of nodes to change (each one is [lon,lat,id,version,tags])
+  # 7. array of nodes to change (each one is [lon,lat,id,version,tags]),
+  # 8. hash of nodes to delete (id->version).

   # 
   # Returns:
   # 0. '0' (code for success),
   # 
   # Returns:
   # 0. '0' (code for success),


@@ -536,7 +581,7 @@ class AmfController < ApplicationController
   # 4. way version,
   # 5. hash of node versions (node=>version)
 
   # 4. way version,
   # 5. hash of node versions (node=>version)
 

-  def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes) #:doc:
+  def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc:

 
     # -- Initialise
        
 
     # -- Initialise
        


@@ -545,22 +590,15 @@ class AmfController < ApplicationController
     if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
 
     originalway = originalway.to_i
     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 }
+logger.info("received #{pointlist} for #{originalway}")
+       pointlist.collect! {|a| a.to_i }
+logger.info("converted to #{pointlist}")

 
     way=nil    # this is returned, so scope it outside the transaction
     nodeversions = {}
     Way.transaction do
 
 
     way=nil    # this is returned, so scope it outside the transaction
     nodeversions = {}
     Way.transaction do
 

-      # -- Get unique nodes
-
-      if originalway <= 0
-        uniques = []
-      else
-        way = Way.find(originalway)
-        uniques = way.unshared_node_ids
-      end
-
-      #-- Update each changed node
+      # -- Update each changed node

 
       nodes.each do |a|
         lon = a[0].to_f
 
       nodes.each do |a|
         lon = a[0].to_f


@@ -586,6 +624,7 @@ class AmfController < ApplicationController
         else
           # We're updating an existing node
           previous=Node.find(id)
         else
           # We're updating an existing node
           previous=Node.find(id)

+          node.id=id

           previous.update_from(node, user)
           nodeversions[previous.id] = previous.version
         end
           previous.update_from(node, user)
           nodeversions[previous.id] = previous.version
         end


@@ -593,9 +632,11 @@ class AmfController < ApplicationController
 
       # -- Save revised way
 
 
       # -- Save revised way
 

-         pointlist.collect! {|a|
-               renumberednodes[a] ? renumberednodes[a]:a
-         } # renumber nodes
+logger.info("renumberednodes is #{renumberednodes.inspect}")
+         pointlist.collect! {|a|
+             renumberednodes[a] ? renumberednodes[a]:a
+         } # renumber nodes
+logger.info("saving with #{pointlist}")

       new_way = Way.new
       new_way.tags = attributes
       new_way.nds = pointlist
       new_way = Way.new
       new_way.tags = attributes
       new_way.nds = pointlist


@@ -604,39 +645,45 @@ class AmfController < ApplicationController
       if originalway <= 0
         new_way.create_with_history(user)
         way=new_way    # so we can get way.id and way.version
       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)
+      else
+             way = Way.find(originalway)
+                 if way.tags!=attributes or way.nds!=pointlist or !way.visible?
+                   new_way.id=originalway
+          way.update_from(new_way, user)
+        end

       end
 
       end
 

-      # -- Delete any unique nodes no longer used
+      # -- Delete unwanted nodes

 
 

-      uniques=uniques-pointlist
-      uniques.each do |n|
-        node = Node.find(n)
-        deleteitemrelations(user, changeset_id, id, 'node', node.version)
+      deletednodes.each do |id,v|
+        node = Node.find(id.to_i)

         new_node = Node.new
         new_node.changeset_id = changeset_id
         new_node = Node.new
         new_node.changeset_id = changeset_id

-        new_node.version = node.version
-        node.delete_with_history!(new_node, user)
+        new_node.version = v.to_i
+        new_node.id = id.to_i
+        begin
+          node.delete_with_history!(new_node, user)
+        rescue OSM::APIPreconditionFailedError => ex
+          # We don't do anything here as the node is being used elsewhere
+          # and we don't want to delete it
+        end

       end
 
     end # transaction
 
       end
 
     end # transaction
 

-    [0, originalway, way.id, renumberednodes, way.version, nodeversions]
+    [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]

   rescue OSM::APIChangesetAlreadyClosedError => ex
   rescue OSM::APIChangesetAlreadyClosedError => ex

-    return [-2, "Sorry, your changeset #{ex.changeset.id} has been closed (at #{ex.changeset.closed_at})."]
+    return [-1, "Sorry, your changeset #{ex.changeset.id} was closed (at #{ex.changeset.closed_at}).", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]

   rescue OSM::APIVersionMismatchError => ex
   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, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
+    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
+    return [-3, ['way', a[1], a[2].downcase, a[3]], originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]

   rescue OSM::APITooManyWayNodesError => ex
   rescue OSM::APITooManyWayNodesError => ex

-    return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed."]
+    return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed.", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]

   rescue OSM::APIAlreadyDeletedError => ex
   rescue OSM::APIAlreadyDeletedError => ex

-    return [-1, "The point has already been deleted."]
+    return [-1, "The point has already been deleted.", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]

   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
   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}). The server said: #{ex}", originalway, originalway, renumberednodes, wayversion, nodeversions, deletednodes]

   end
 
   # Save POI to the database.
   end
 
   # Save POI to the database.


@@ -660,7 +707,7 @@ class AmfController < ApplicationController
         node = Node.find(id)
 
         if !visible 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
+          unless node.ways.empty? then return -1,"The point has since become part of a way, so you cannot save it as a POI.",id,id,version end

         end
       end
       # We always need a new node, based on the data that has been sent to us
         end
       end
       # We always need a new node, based on the data that has been sent to us


@@ -676,52 +723,53 @@ class AmfController < ApplicationController
         new_node.create_with_history(user)
       elsif visible
         # We're updating the node
         new_node.create_with_history(user)
       elsif visible
         # We're updating the node

+        new_node.id=id

         node.update_from(new_node, user)
       else
         # We're deleting the node
         node.update_from(new_node, user)
       else
         # We're deleting the node

+        new_node.id=id

         node.delete_with_history!(new_node, user)
       end
         node.delete_with_history!(new_node, user)
       end

-     end # transaction
+
+    end # transaction

 
     if id <= 0
 
     if id <= 0

-      return [0, id, new_node.id, new_node.version]
+      return [0, '', id, new_node.id, new_node.version]

     else
     else

-      return [0, id, node.id, node.version]
+      return [0, '', id, node.id, node.version]

     end 
   rescue OSM::APIChangesetAlreadyClosedError => ex
     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}",id,id,version]

   rescue OSM::APIVersionMismatchError => ex
   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, "Sorry, someone else has changed this point since you started editing. Please click the 'Edit' tab to reload the area."]
+    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
+    return [-3, ['node', a[1]], id,id,version]

   rescue OSM::APIAlreadyDeletedError => ex
   rescue OSM::APIAlreadyDeletedError => ex

-    return [-1, "The point has already been deleted"]
+    return [-1, "The point has already been deleted",id,id,version]

   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
   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}). The server said: #{ex}",id,id,version]

   end
 
   # Read POI from database
   # (only called on revert: POIs are usually read by whichways).
   #
   end
 
   # Read POI from database
   # (only called on revert: POIs are usually read by whichways).
   #

-  # Returns array of id, long, lat, hash of tags, version.
+  # Returns array of id, long, lat, hash of tags, (current) version.

 
   def getpoi(id,timestamp) #:doc:
 
   def getpoi(id,timestamp) #:doc:

-    if timestamp == '' then
-      n = Node.find(id)
-    else
+    n = Node.find(id)
+    v = n.version
+    unless timestamp == ''

       n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
     end
 
     if n
       n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
     end
 
     if n

-      return [n.id, n.lon, n.lat, n.tags, n.version]
+      return [0, '', n.id, n.lon, n.lat, n.tags, v]

     else
     else

-      return [nil, nil, nil, {}, nil]
+      return [-4, 'node', id, nil, nil, {}, nil]

     end
   end
 
     end
   end
 

-  # Delete way and all constituent nodes. Also removes from any relations.
+  # Delete way and all constituent nodes.

   # Params:
   # * The user token
   # * the changeset id
   # Params:
   # * The user token
   # * the changeset id


@@ -729,80 +777,62 @@ class AmfController < ApplicationController
   # * the version of the way that was downloaded
   # * a hash of the id and versions of all the nodes that are in the way, if any 
   # of the nodes have been changed by someone else then, there is a problem!
   # * the version of the way that was downloaded
   # * a hash of the id and versions of all the nodes that are in the way, if any 
   # of the nodes have been changed by someone else then, there is a problem!

-  # Returns 0 (success), unchanged way id.
+  # Returns 0 (success), unchanged way id, new way version, new node versions.

 
 

-  def deleteway(usertoken, changeset_id, way_id, way_version, node_id_version) #:doc:
+  def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:

     user = getuser(usertoken)
     unless user then return -1,"You are not logged in, so the way could not be deleted." end
       
     way_id = way_id.to_i
     user = getuser(usertoken)
     unless user then return -1,"You are not logged in, so the way could not be deleted." end
       
     way_id = way_id.to_i

+    nodeversions = {}
+    old_way=nil # returned, so scope it outside the transaction

     # Need a transaction so that if one item fails to delete, the whole delete fails.
     Way.transaction do
 
     # Need a transaction so that if one item fails to delete, the whole delete fails.
     Way.transaction do
 

-      # delete the way
+      # -- Delete the way
+

       old_way = Way.find(way_id)
       delete_way = Way.new
       delete_way.version = way_version
       delete_way.changeset_id = changeset_id
       old_way = Way.find(way_id)
       delete_way = Way.new
       delete_way.version = way_version
       delete_way.changeset_id = changeset_id

+      delete_way.id = way_id

       old_way.delete_with_history!(delete_way, user)
 
       old_way.delete_with_history!(delete_way, user)
 

-      old_way.unshared_node_ids.each do |node_id|
-        # delete the node
-        node = Node.find(node_id)
-        delete_node = Node.new
-        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)
+      # -- Delete unwanted nodes
+
+      deletednodes.each do |id,v|
+        node = Node.find(id.to_i)
+        new_node = Node.new
+        new_node.changeset_id = changeset_id
+        new_node.version = v.to_i
+        new_node.id = id.to_i
+        begin
+          node.delete_with_history!(new_node, user)
+          nodeversions[node.id]=node.version
+        rescue OSM::APIPreconditionFailedError => ex
+          # We don't do anything with the exception as the node is in use
+          # elsewhere and we don't want to delete it
+        end

       end
       end

+

     end # transaction
     end # transaction

-    [0, way_id]
+    [0, '', way_id, old_way.version, nodeversions]

   rescue OSM::APIChangesetAlreadyClosedError => ex
   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}",way_id,way_version,nodeversions]

   rescue OSM::APIVersionMismatchError => ex
   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, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
+    a=ex.to_s.match(/(\d+) of (\w+) (\d+)$/)
+    return [-3, ['way', a[1]],way_id,way_version,nodeversions]

   rescue OSM::APIAlreadyDeletedError => ex
   rescue OSM::APIAlreadyDeletedError => ex

-    return [-1, "The way has already been deleted."]
+    return [-1, "The way has already been deleted.",way_id,way_version,nodeversions]

   rescue OSM::APIError => ex
     # Some error that we don't specifically catch
   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}). The server said: #{ex}",way_id,way_version,nodeversions]

   end
 
 
   # ====================================================================
   # Support functions
 
   end
 
 
   # ====================================================================
   # Support functions
 

-  # Remove a node or way from all relations
-  # 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], 
-                                                                       :include => :relation).collect { |rm| rm.relation }.uniq
-
-    relations.each do |rel|
-      rel.members.delete_if { |x| x[0] == type and x[1] == objid }
-      new_rel = Relation.new
-      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
-  end
-

   # Authenticate token
   # (can also be of form user:pass)
   # When we are writing to the api, we need the actual user model, 
   # Authenticate token
   # (can also be of form user:pass)
   # When we are writing to the api, we need the actual user model, 


@@ -876,7 +906,7 @@ 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 
       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?
        WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
       EOF
     unless way_ids.empty?


@@ -885,17 +915,17 @@ 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
         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
          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
   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 
       FROM current_way_nodes,current_nodes 
        WHERE current_way_nodes.id=#{wayid.to_i} 
                   AND current_way_nodes.node_id=current_nodes.id 


@@ -908,7 +938,7 @@ class AmfController < ApplicationController
         nodetags[n['k']]=n['v']
       end
       nodetags.delete('created_by')
         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
     end
     points
   end