X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/e2c0e51e4545a7e373aad3650048e0a50497e108..5e10a7d48bfc8ebe8886c6cf49043c95bb84d190:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 589005d3c..d8d7ce3c4 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -3,7 +3,7 @@ # OSM database takes place using this controller. Messages are # encoded in the Actionscript Message Format (AMF). # -# Helper functions are in /lib/potlatch. +# Helper functions are in /lib/potlatch.rb # # Author:: editions Systeme D / Richard Fairhurst 2004-2008 # Licence:: public domain. @@ -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)) @@ -109,20 +113,21 @@ 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] - if r[1] != r[2] - renumberedways[r[1]] = r[2] - end - results[index]=AMF.putdata(index,r) + 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'; results[index]=AMF.putdata(index,putpoi(*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)) end end + logger.info("encoding AMF results") sendresponse(results) end @@ -131,14 +136,16 @@ class AmfController < ApplicationController # Start new changeset def startchangeset(usertoken, cstags, closeid, closecomment) - uid = getuserid(usertoken) - if !uid 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 # close previous changeset and add comment if closeid cs = Changeset.find(closeid) cs.set_closed_time_now - if closecomment.empty? + if cs.user_id!=user.id + return -2,"You cannot close that changeset because you're not the person who opened it." + elsif closecomment.empty? cs.save! else cs.tags['comment']=closecomment @@ -149,10 +156,10 @@ class AmfController < ApplicationController # open a new changeset cs = Changeset.new cs.tags = cstags - cs.user_id = uid - # Don't like the next two lines. These need to be abstracted to the model more/better - cs.created_at = Time.now - cs.closed_at = Time.new + Changeset::IDLE_TIMEOUT + 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] end @@ -164,21 +171,28 @@ class AmfController < ApplicationController 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. - + # + # return is of the form: + # [error_code, + # [[way_id, way_version], ...], + # [[node_id, lat, lon, [tags, ...], node_version], ...], + # [[rel_id, rel_version], ...]] + # where the ways are any visible ways which refer to any visible + # nodes in the bbox, nodes are any visible nodes in the bbox but not + # 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 - begin - check_boundaries(xmin, ymin, xmax, ymax) - rescue Exception => err - return [-2,"Sorry - I can't get the map for that area."] - end + check_boundaries(xmin, ymin, xmax, ymax) if POTLATCH_USE_SQL then ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax) @@ -187,14 +201,15 @@ class AmfController < ApplicationController else # find the way ids in an area nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways) - ways = nodes_in_area.collect { |node| - node.ways.collect { |w| [w.id,w.version] }.flatten + ways = nodes_in_area.inject([]) { |sum, node| + visible_ways = node.ways.select { |w| w.visible? } + sum + visible_ways.collect { |w| [w.id,w.version] } }.uniq ways.delete([]) # 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] } + 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}) + @@ -202,15 +217,19 @@ 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."] 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 + 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 @@ -231,9 +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 @@ -250,7 +269,7 @@ class AmfController < ApplicationController points = way.nodes.collect do |node| nodetags=node.tags nodetags.delete('created_by') - [node.lon, node.lat, node.id, nodetags] + [node.lon, node.lat, node.id, nodetags, node.version] end tags = way.tags version = way.version @@ -258,7 +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, @@ -273,76 +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| d0 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 @@ -393,194 +454,260 @@ class AmfController < ApplicationController # 1. original relation id (unchanged), # 2. new relation id. - def putrelation(renumberednodes, renumberedways, usertoken, changeset, 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 + 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 visible = (visible.to_i != 0) - # create a new relation, or find the existing one - if relid <= 0 - rel = Relation.new - rel.version = 0 - else - rel = Relation.find(relid) - end - - # check the members are all positive, and correctly type - typedmembers = [] - members.each do |m| - mid = m[1].to_i - if mid < 0 - mid = renumberednodes[mid] if m[0] == 'node' - mid = renumberedways[mid] if m[0] == 'way' + new_relation = nil + relation = nil + Relation.transaction do + # create a new relation, or find the existing one + if relid > 0 + relation = Relation.find(relid) end - if mid - typedmembers << [m[0], mid, m[2]] + # We always need a new node, based on the data that has been sent to us + new_relation = Relation.new + + # check the members are all positive, and correctly type + typedmembers = [] + members.each do |m| + mid = m[1].to_i + if mid < 0 + mid = renumberednodes[mid] if m[0] == 'node' + mid = renumberedways[mid] if m[0] == 'way' + end + if mid + typedmembers << [m[0], mid, m[2]] + end end - end - - # assign new contents - rel.members = typedmembers - rel.tags = tags - rel.visible = visible - rel.changeset_id = changeset - - # 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] + # assign new contents + new_relation.members = typedmembers + new_relation.tags = tags + new_relation.visible = visible + new_relation.changeset_id = changeset_id + new_relation.version = version + + # NOTE: id or relid here? id doesn't seem to be set above + if relid <= 0 + # We're creating the node + new_relation.create_with_history(user) + elsif visible + # We're updating the node + relation.update_from(new_relation, user) + else + # We're deleting the node + relation.delete_with_history!(new_relation, user) + end + end # transaction + + if id <= 0 + return [0, relid, new_relation.id, new_relation.version] + else + return [0, relid, relation.id, relation.version] + end + rescue OSM::APIChangesetAlreadyClosedError => ex + 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, "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 relation has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "An unusual error happened (in 'putrelation')."] 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 (added by amf_controller) + # 1. current user token (for authentication) + # 2. current changeset + # 3. new way version + # 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]) + # # Returns: # 0. '0' (code for success), # 1. original way id (unchanged), # 2. new way id, # 3. hash of renumbered nodes (old id=>new id), - # 4. version + # 4. way version, + # 5. hash of node versions (node=>version) - def putway(renumberednodes, usertoken, changeset, originalway, points, attributes) #:doc: + def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes) #:doc: - # -- Initialise and carry out checks + # -- Initialise - uid = getuserid(usertoken) - if !uid then return -1,"You are not logged in, so the way could not be saved." end + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the way could not be saved." end + 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 } - points.each do |a| - if a[2] == 0 or a[2].nil? then return -2,"Server error - node with id 0 found in way #{originalway}." end - if a[1] == 90 then return -2,"Server error - node with lat -90 found in way #{originalway}." end - end - - if points.length < 2 then return -2,"Server error - way is only #{points.length} points long." end - - # -- Get unique nodes + way=nil # this is returned, so scope it outside the transaction + nodeversions = {} + Way.transaction do - if originalway < 0 - way = Way.new - way.version = 0 # otherwise +=1 breaks - uniques = [] - else - way = Way.find(originalway) - uniques = way.unshared_node_ids - end + # -- Get unique nodes - # -- Compare nodes and save changes to any that have changed + if originalway <= 0 + uniques = [] + else + way = Way.find(originalway) + uniques = way.unshared_node_ids + end - nodes = [] + #-- Update each changed node - points.each do |n| - lon = n[0].to_f - lat = n[1].to_f - id = n[2].to_i - savenode = false + nodes.each do |a| + lon = a[0].to_f + lat = a[1].to_f + id = a[2].to_i + version = a[3].to_i + if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end + if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end + if renumberednodes[id] then id = renumberednodes[id] end - if renumberednodes[id] - id = renumberednodes[id] - elsif id < 0 - # Create new node node = Node.new - node.version = 0 # otherwise +=1 breaks - savenode = true - else - node = Node.find(id) - nodetags=node.tags - nodetags.delete('created_by') - if !fpcomp(lat, node.lat) or !fpcomp(lon, node.lon) or - n[4] != nodetags or !node.visible? - savenode = true - end - end - - if savenode - node.changeset_id = changeset + node.changeset_id = changeset_id node.lat = lat node.lon = lon - node.tags = n[4] - node.visible = true - node.save_with_history! - - if id != node.id + node.tags = a[4] + node.tags.delete('created_by') + node.version = version + if id <= 0 + # We're creating the node + node.create_with_history(user) renumberednodes[id] = node.id - id = node.id + nodeversions[node.id] = node.version + else + # We're updating an existing node + previous=Node.find(id) + previous.update_from(node, user) + nodeversions[previous.id] = previous.version end end - uniques = uniques - [id] - nodes.push(id) - end - - # -- Delete any unique nodes - - uniques.each do |n| - deleteitemrelations(n, 'node') - - node = Node.find(n) - node.changeset_id = changeset - node.visible = false - node.save_with_history! - 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_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 - # -- Save revised way + # -- Delete any unique nodes no longer used - if way.tags!=attributes or way.nds!=nodes or !way.visible? - way.tags = attributes - way.nds = nodes - way.changeset_id = changeset - way.visible = true - way.save_with_history! - end + 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 - [0, originalway, way.id, renumberednodes, way.version] + end # transaction + + [0, originalway, way.id, renumberednodes, way.version, nodeversions] + rescue OSM::APIChangesetAlreadyClosedError => ex + return [-2, "Sorry, your changeset #{ex.changeset.id} has been 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, "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 point has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "An unusual error happened (in 'putway')."] end # Save POI to the database. # Refuses save if the node has since become part of a way. - # Returns: + # Returns array with: # 0. 0 (success), # 1. original node id (unchanged), # 2. new node id, # 3. version. - def putpoi(usertoken, changeset, 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 + 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 id = id.to_i visible = (visible.to_i == 1) + node = nil + new_node = nil + Node.transaction do + if id > 0 then + node = Node.find(id) - 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') + 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 + end end - else - node = Node.new - node.version = 0 - end - - node.changeset_id = changeset - node.lat = lat - node.lon = lon - node.tags = tags - node.visible = visible - node.save_with_history! + # 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_id + new_node.version = version + new_node.lat = lat + new_node.lon = lon + new_node.tags = tags + if id <= 0 + # We're creating the node + new_node.create_with_history(user) + elsif visible + # We're updating the node + node.update_from(new_node, user) + else + # We're deleting the node + node.delete_with_history!(new_node, user) + end + end # transaction - [0, id, node.id, node.version] + if id <= 0 + return [0, id, new_node.id, new_node.version] + else + return [0, id, node.id, node.version] + end + rescue OSM::APIChangesetAlreadyClosedError => ex + 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, "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 point has already been deleted"] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "An unusual error happened (in 'putpoi')."] end # Read POI from database @@ -588,11 +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 @@ -603,24 +730,59 @@ class AmfController < ApplicationController end # Delete way and all constituent nodes. Also removes from any relations. + # Params: + # * The user token + # * the changeset id + # * the id of the way to change + # * 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. - def deleteway(usertoken, changeset_id, way_id) #:doc: - if !getuserid(usertoken) then return -1,"You are not logged in, so the way could not be deleted." end - + def deleteway(usertoken, changeset_id, way_id, way_version, node_id_version) #: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 - - # FIXME: would be good not to make two history entries when removing - # two nodes from the same relation - way = Way.find(way_id) - 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) - + # Need a transaction so that if one item fails to delete, the whole delete fails. + Way.transaction do + + # 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.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) + end + end # transaction [0, way_id] + rescue OSM::APIChangesetAlreadyClosedError => ex + 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, "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 way has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "An unusual error happened (in 'deleteway')."] end @@ -628,46 +790,39 @@ class AmfController < ApplicationController # 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(objid, type) #:doc: + 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 } - rel.save_with_history! - 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 = 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 - tags end # Authenticate token # (can also be of form user:pass) + # When we are writing to the api, we need the actual user model, + # not just the id, hence this abstraction - def getuserid(token) #:doc: + def getuser(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) + return user end # Send AMF response