# 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.
# 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'
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_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args))
when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i))
when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i))
- when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1].to_i))
+ when 'getway_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))
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]
when 'startchangeset'; results[index]=AMF.putdata(index,startchangeset(*args))
end
end
+ logger.info("encoding AMF results")
sendresponse(results)
end
# 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
# 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.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.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
cs.save_with_tags!
return [0,cs.id]
end
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)
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}) +
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
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
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
# 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?
+ # 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."]
+ 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:
- begin
- 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]
+ return ['node', nodeid, history]
rescue ActiveRecord::RecordNotFound
return ['node', nodeid, []]
end
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
# 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.
+ # 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
- #if !rel.preconditions_ok?
- # return -2, "Relation preconditions failed"
- #else
- rel.save_with_history!
- #end
- [0, relid, rel.id]
+ if id <= 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, "Something really bad happened :-( ."]
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
+ way=nil # this is returned, so scope it outside the transaction
+ nodeversions = {}
+ Way.transaction do
- # -- Get unique nodes
+ # -- Get unique nodes
- if originalway < 0
- way = Way.new
- way.version = 0 # otherwise +=1 breaks
- uniques = []
- else
- way = Way.find(originalway)
- uniques = way.unshared_node_ids
- end
-
- # -- 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, "Something really bad happened :-(."]
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, "Something really bad happened :-()"]
end
# Read POI from database
#
# 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
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, "Something really bad happened :-( ."]
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(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!
+ 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
- # Break out node tags into a hash
- # (should become obsolete as of API 0.6)
-
- def tagstring_to_hash(a) #:doc:
- tags={}
- Tags.split(a) do |k, v|
- tags[k]=v
- end
- 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
projects / rails.git / blobdiff