1 # amf_controller is a semi-standalone API for Flash clients, particularly
2 # Potlatch. All interaction between Potlatch (as a .SWF application) and the
3 # OSM database takes place using this controller. Messages are
4 # encoded in the Actionscript Message Format (AMF).
6 # Helper functions are in /lib/potlatch.rb
8 # Author:: editions Systeme D / Richard Fairhurst 2004-2008
9 # Licence:: public domain.
11 # == General structure
13 # Apart from the amf_read and amf_write methods (which distribute the requests
14 # from the AMF message), each method generally takes arguments in the order
15 # they were sent by the Potlatch SWF. Do not assume typing has been preserved.
16 # Methods all return an array to the SWF.
20 # Note that this requires a patched version of composite_primary_keys 1.1.0
21 # (see http://groups.google.com/group/compositekeys/t/a00e7562b677e193)
22 # if you are to run with POTLATCH_USE_SQL=false .
26 # Any method that returns a status code (0 for ok) can also send:
27 # return(-1,"message") <-- just puts up a dialogue
28 # return(-2,"message") <-- also asks the user to e-mail me
30 # To write to the Rails log, use logger.info("message").
33 # * version conflict when POIs and ways are reverted
35 class AmfController < ApplicationController
40 # Help methods for checking boundary sanity and area size
44 before_filter :check_api_writable
46 # Main AMF handlers: process the raw AMF string (using AMF library) and
47 # calls each action (private method) accordingly.
48 # ** FIXME: refactor to reduce duplication of code across read/write
51 req=StringIO.new(request.raw_post+0.chr)# Get POST data as request
52 # (cf http://www.ruby-forum.com/topic/122163)
53 req.read(2) # Skip version indicator and client ID
54 results={} # Results of each body
58 headers=AMF.getint(req) # Read number of headers
60 headers.times do # Read each header
61 name=AMF.getstring(req) # |
62 req.getc # | skip boolean
63 value=AMF.getvalue(req) # |
64 header["name"]=value # |
67 bodies=AMF.getint(req) # Read number of bodies
68 bodies.times do # Read each body
69 message=AMF.getstring(req) # | get message name
70 index=AMF.getstring(req) # | get index in response sequence
71 bytes=AMF.getlong(req) # | get total size in bytes
72 args=AMF.getvalue(req) # | get response (probably an array)
73 logger.info("Executing AMF #{message}:#{index}")
76 when 'getpresets'; results[index]=AMF.putdata(index,getpresets())
77 when 'whichways'; results[index]=AMF.putdata(index,whichways(*args))
78 when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args))
79 when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i))
80 when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i))
81 when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
82 when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i))
83 when 'getnode_history'; results[index]=AMF.putdata(index,getnode_history(args[0].to_i))
84 when 'findgpx'; results[index]=AMF.putdata(index,findgpx(*args))
85 when 'findrelations'; results[index]=AMF.putdata(index,findrelations(*args))
86 when 'getpoi'; results[index]=AMF.putdata(index,getpoi(*args))
89 logger.info("encoding AMF results")
94 req=StringIO.new(request.raw_post+0.chr)
97 renumberednodes={} # Shared across repeated putways
98 renumberedways={} # Shared across repeated putways
100 headers=AMF.getint(req) # Read number of headers
101 headers.times do # Read each header
102 name=AMF.getstring(req) # |
103 req.getc # | skip boolean
104 value=AMF.getvalue(req) # |
105 header["name"]=value # |
108 bodies=AMF.getint(req) # Read number of bodies
109 bodies.times do # Read each body
110 message=AMF.getstring(req) # | get message name
111 index=AMF.getstring(req) # | get index in response sequence
112 bytes=AMF.getlong(req) # | get total size in bytes
113 args=AMF.getvalue(req) # | get response (probably an array)
115 logger.info("Executing AMF #{message}:#{index}")
117 when 'putway'; r=putway(renumberednodes,*args)
119 if r[1] != r[2] then renumberedways[r[1]] = r[2] end
120 results[index]=AMF.putdata(index,r)
121 when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
122 when 'deleteway'; results[index]=AMF.putdata(index,deleteway(*args))
123 when 'putpoi'; r=putpoi(*args)
124 if r[1] != r[2] then renumberednodes[r[1]] = r[2] end
125 results[index]=AMF.putdata(index,r)
126 when 'startchangeset'; results[index]=AMF.putdata(index,startchangeset(*args))
129 logger.info("encoding AMF results")
130 sendresponse(results)
135 # Start new changeset
137 def startchangeset(usertoken, cstags, closeid, closecomment)
138 user = getuser(usertoken)
139 if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
141 # close previous changeset and add comment
143 cs = Changeset.find(closeid)
144 cs.set_closed_time_now
145 if cs.user_id!=user.id
146 return -2,"You cannot close that changeset because you're not the person who opened it."
147 elsif closecomment.empty?
150 cs.tags['comment']=closecomment
155 # open a new changeset
159 # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
160 cs.created_at = Time.now.getutc
161 cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
166 # Return presets (default tags, localisation etc.):
167 # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
169 def getpresets() #:doc:
170 return POTLATCH_PRESETS
174 # Find all the ways, POI nodes (i.e. not part of ways), and relations
175 # in a given bounding box. Nodes are returned in full; ways and relations
178 # return is of the form:
180 # [[way_id, way_version], ...],
181 # [[node_id, lat, lon, [tags, ...], node_version], ...],
182 # [[rel_id, rel_version], ...]]
183 # where the ways are any visible ways which refer to any visible
184 # nodes in the bbox, nodes are any visible nodes in the bbox but not
185 # used in any way, rel is any relation which refers to either a way
186 # or node that we're returning.
187 def whichways(xmin, ymin, xmax, ymax) #:doc:
188 enlarge = [(xmax-xmin)/8,0.01].min
189 xmin -= enlarge; ymin -= enlarge
190 xmax += enlarge; ymax += enlarge
192 # check boundary is sane and area within defined
193 # see /config/application.yml
194 check_boundaries(xmin, ymin, xmax, ymax)
196 if POTLATCH_USE_SQL then
197 ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
198 points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
199 relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
201 # find the way ids in an area
202 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
203 ways = nodes_in_area.inject([]) { |sum, node|
204 visible_ways = node.ways.select { |w| w.visible? }
205 sum + visible_ways.collect { |w| [w.id,w.version] }
209 # find the node ids in an area that aren't part of ways
210 nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
211 points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
213 # find the relations used by those nodes and ways
214 relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
215 Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
216 relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
219 [0, ways, points, relations]
221 rescue Exception => err
222 [-2,"Sorry - I can't get the map for that area."]
225 # Find deleted ways in current bounding box (similar to whichways, but ways
226 # with a deleted node only - not POIs or relations).
228 def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
229 enlarge = [(xmax-xmin)/8,0.01].min
230 xmin -= enlarge; ymin -= enlarge
231 xmax += enlarge; ymax += enlarge
233 # check boundary is sane and area within defined
234 # see /config/application.yml
236 check_boundaries(xmin, ymin, xmax, ymax)
237 rescue Exception => err
238 return [-2,"Sorry - I can't get the map for that area."]
241 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
242 way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
247 # Get a way including nodes and tags.
248 # Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number.
250 def getway(wayid) #:doc:
251 if POTLATCH_USE_SQL then
252 points = sql_get_nodes_in_way(wayid)
253 tags = sql_get_tags_in_way(wayid)
254 version = sql_get_way_version(wayid)
256 # Ideally we would do ":include => :nodes" here but if we do that
257 # then rails only seems to return the first copy of a node when a
258 # way includes a node more than once
260 way = Way.find(wayid)
261 rescue ActiveRecord::RecordNotFound
265 # check case where way has been deleted or doesn't exist
266 return [wayid,[],{}] if way.nil? or !way.visible
268 points = way.nodes.collect do |node|
270 nodetags.delete('created_by')
271 [node.lon, node.lat, node.id, nodetags, node.version]
274 version = way.version
277 [wayid, points, tags, version]
280 # Get an old version of a way, and all constituent nodes.
282 # For undelete (version<0), always uses the most recent version of each node,
283 # even if it's moved. For revert (version >= 0), uses the node in existence
284 # at the time, generating a new id if it's still visible and has been moved/
290 # 2. array of points,
293 # 5. is this the current, visible version? (boolean)
295 def getway_old(id, timestamp) #:doc:
298 old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
299 points = old_way.get_nodes_undelete unless old_way.nil?
303 timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
304 old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
306 points = old_way.get_nodes_revert(timestamp)
308 return [-1, "Sorry, the way was deleted at that time - please revert to a previous version."]
312 # thrown by date parsing method. leave old_way as nil for
313 # the superb error handler below.
318 # *** FIXME: shouldn't this be returning an error?
319 return [-1, id, [], {}, -1,0]
322 old_way.tags['history'] = "Retrieved from v#{old_way.version}"
323 return [0, id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
327 # Find history of a way.
328 # Returns 'way', id, and an array of previous versions:
329 # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
330 # - now [timestamp,user,uid]
332 # Heuristic: Find all nodes that have ever been part of the way;
333 # get a list of their revision dates; add revision dates of the way;
334 # sort and collapse list (to within 2 seconds); trim all dates before the
335 # start date of the way.
337 def getway_history(wayid) #:doc:
340 # Find list of revision dates for way and all constituent nodes
343 Way.find(wayid).old_ways.collect do |a|
344 revdates.push(a.timestamp)
345 unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
347 Node.find(n).old_nodes.collect do |o|
348 revdates.push(o.timestamp)
349 unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
353 waycreated=revdates[0]
358 # Remove any dates (from nodes) before first revision date of way
359 revdates.delete_if { |d| d<waycreated }
360 # Remove any elements where 2 seconds doesn't elapse before next one
361 revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
362 # Collect all in one nested array
363 revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
365 return ['way',wayid,revdates]
366 rescue ActiveRecord::RecordNotFound
367 return ['way', wayid, []]
371 # Find history of a node. Returns 'node', id, and an array of previous versions as above.
373 def getnode_history(nodeid) #:doc:
375 history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
376 [old_node.timestamp.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
378 return ['node', nodeid, history]
379 rescue ActiveRecord::RecordNotFound
380 return ['node', nodeid, []]
385 user_object = obj.changeset.user
386 user = user_object.data_public? ? user_object.display_name : 'anonymous'
387 uid = user_object.data_public? ? user_object.id : 0
391 # Find GPS traces with specified name/id.
392 # Returns array listing GPXs, each one comprising id, name and description.
394 def findgpx(searchterm, usertoken)
395 user = getuser(usertoken)
396 if !uid then return -1,"You must be logged in to search for GPX traces." end
399 if searchterm.to_i>0 then
400 gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
402 gpxs.push([gpx.id, gpx.name, gpx.description])
405 Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
406 gpxs.push([gpx.id, gpx.name, gpx.description])
412 # Get a relation with all tags and members.
416 # 2. list of members,
419 def getrelation(relid) #:doc:
421 rel = Relation.find(relid)
422 rescue ActiveRecord::RecordNotFound
423 return [relid, {}, []]
426 return [relid, {}, [], nil] if rel.nil? or !rel.visible
427 [relid, rel.tags, rel.members, rel.version]
430 # Find relations with specified name/id.
431 # Returns array of relations, each in same form as getrelation.
433 def findrelations(searchterm)
435 if searchterm.to_i>0 then
436 rel = Relation.find(searchterm.to_i)
437 if rel and rel.visible then
438 rels.push([rel.id, rel.tags, rel.members])
441 RelationTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", searchterm] ).each do |t|
442 if t.relation.visible then
443 rels.push([t.relation.id, t.relation.tags, t.relation.members])
453 # 1. original relation id (unchanged),
454 # 2. new relation id.
456 def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
457 user = getuser(usertoken)
458 if !user then return -1,"You are not logged in, so the relation could not be saved." end
461 visible = (visible.to_i != 0)
465 Relation.transaction do
466 # create a new relation, or find the existing one
468 relation = Relation.find(relid)
470 # We always need a new node, based on the data that has been sent to us
471 new_relation = Relation.new
473 # check the members are all positive, and correctly type
478 mid = renumberednodes[mid] if m[0] == 'node'
479 mid = renumberedways[mid] if m[0] == 'way'
482 typedmembers << [m[0], mid, m[2]]
486 # assign new contents
487 new_relation.members = typedmembers
488 new_relation.tags = tags
489 new_relation.visible = visible
490 new_relation.changeset_id = changeset_id
491 new_relation.version = version
493 # NOTE: id or relid here? id doesn't seem to be set above
495 # We're creating the node
496 new_relation.create_with_history(user)
498 # We're updating the node
499 relation.update_from(new_relation, user)
501 # We're deleting the node
502 relation.delete_with_history!(new_relation, user)
507 return [0, relid, new_relation.id, new_relation.version]
509 return [0, relid, relation.id, relation.version]
511 rescue OSM::APIChangesetAlreadyClosedError => ex
512 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}."]
513 rescue OSM::APIVersionMismatchError => ex
514 # Really need to check to see whether this is a server load issue, and the
515 # last version was in the same changeset, or belongs to the same user, then
516 # we can return something different
517 return [-3, "Sorry, someone else has changed this relation since you started editing. Please click the 'Edit' tab to reload the area."]
518 rescue OSM::APIAlreadyDeletedError => ex
519 return [-1, "The relation has already been deleted."]
520 rescue OSM::APIError => ex
521 # Some error that we don't specifically catch
522 return [-2, "Something really bad happened :-( ."]
525 # Save a way to the database, including all nodes. Any nodes in the previous
526 # version and no longer used are deleted.
529 # 0. hash of renumbered nodes (added by amf_controller)
530 # 1. current user token (for authentication)
531 # 2. current changeset
534 # 5. list of nodes in way
535 # 6. hash of way tags
536 # 7. array of nodes to change (each one is [lon,lat,id,version,tags])
539 # 0. '0' (code for success),
540 # 1. original way id (unchanged),
542 # 3. hash of renumbered nodes (old id=>new id),
544 # 5. hash of node versions (node=>version)
546 def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes) #:doc:
550 user = getuser(usertoken)
551 if !user then return -1,"You are not logged in, so the way could not be saved." end
552 if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
554 originalway = originalway.to_i
555 pointlist.collect! {|a| a.to_i }
557 way=nil # this is returned, so scope it outside the transaction
561 # -- Get unique nodes
566 way = Way.find(originalway)
567 uniques = way.unshared_node_ids
570 #-- Update each changed node
577 if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end
578 if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
579 if renumberednodes[id] then id = renumberednodes[id] end
582 node.changeset_id = changeset_id
586 node.tags.delete('created_by')
587 node.version = version
589 # We're creating the node
590 node.create_with_history(user)
591 renumberednodes[id] = node.id
592 nodeversions[node.id] = node.version
594 # We're updating an existing node
595 previous=Node.find(id)
596 previous.update_from(node, user)
597 nodeversions[previous.id] = previous.version
601 # -- Save revised way
603 pointlist.collect! {|a|
604 renumberednodes[a] ? renumberednodes[a]:a
607 new_way.tags = attributes
608 new_way.nds = pointlist
609 new_way.changeset_id = changeset_id
610 new_way.version = wayversion
612 new_way.create_with_history(user)
613 way=new_way # so we can get way.id and way.version
614 elsif way.tags!=attributes or way.nds!=pointlist or !way.visible?
615 way.update_from(new_way, user)
618 # -- Delete any unique nodes no longer used
620 uniques=uniques-pointlist
623 deleteitemrelations(user, changeset_id, id, 'node', node.version)
625 new_node.changeset_id = changeset_id
626 new_node.version = node.version
627 node.delete_with_history!(new_node, user)
632 [0, originalway, way.id, renumberednodes, way.version, nodeversions]
633 rescue OSM::APIChangesetAlreadyClosedError => ex
634 return [-2, "Sorry, your changeset #{ex.changeset.id} has been closed (at #{ex.changeset.closed_at})."]
635 rescue OSM::APIVersionMismatchError => ex
636 # Really need to check to see whether this is a server load issue, and the
637 # last version was in the same changeset, or belongs to the same user, then
638 # we can return something different
639 return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
640 rescue OSM::APITooManyWayNodesError => ex
641 return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed."]
642 rescue OSM::APIAlreadyDeletedError => ex
643 return [-1, "The point has already been deleted."]
644 rescue OSM::APIError => ex
645 # Some error that we don't specifically catch
646 return [-2, "Something really bad happened :-(."]
649 # Save POI to the database.
650 # Refuses save if the node has since become part of a way.
651 # Returns array with:
653 # 1. original node id (unchanged),
657 def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
658 user = getuser(usertoken)
659 if !user then return -1,"You are not logged in, so the point could not be saved." end
662 visible = (visible.to_i == 1)
670 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
673 # We always need a new node, based on the data that has been sent to us
676 new_node.changeset_id = changeset_id
677 new_node.version = version
682 # We're creating the node
683 new_node.create_with_history(user)
685 # We're updating the node
686 node.update_from(new_node, user)
688 # We're deleting the node
689 node.delete_with_history!(new_node, user)
694 return [0, id, new_node.id, new_node.version]
696 return [0, id, node.id, node.version]
698 rescue OSM::APIChangesetAlreadyClosedError => ex
699 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"]
700 rescue OSM::APIVersionMismatchError => ex
701 # Really need to check to see whether this is a server load issue, and the
702 # last version was in the same changeset, or belongs to the same user, then
703 # we can return something different
704 return [-3, "Sorry, someone else has changed this point since you started editing. Please click the 'Edit' tab to reload the area."]
705 rescue OSM::APIAlreadyDeletedError => ex
706 return [-1, "The point has already been deleted"]
707 rescue OSM::APIError => ex
708 # Some error that we don't specifically catch
709 return [-2, "Something really bad happened :-()"]
712 # Read POI from database
713 # (only called on revert: POIs are usually read by whichways).
715 # Returns array of id, long, lat, hash of tags, version.
717 def getpoi(id,timestamp) #:doc:
718 if timestamp == '' then
721 n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
725 return [n.id, n.lon, n.lat, n.tags, n.version]
727 return [nil, nil, nil, {}, nil]
731 # Delete way and all constituent nodes. Also removes from any relations.
735 # * the id of the way to change
736 # * the version of the way that was downloaded
737 # * a hash of the id and versions of all the nodes that are in the way, if any
738 # of the nodes have been changed by someone else then, there is a problem!
739 # Returns 0 (success), unchanged way id.
741 def deleteway(usertoken, changeset_id, way_id, way_version, node_id_version) #:doc:
742 user = getuser(usertoken)
743 unless user then return -1,"You are not logged in, so the way could not be deleted." end
746 # Need a transaction so that if one item fails to delete, the whole delete fails.
750 old_way = Way.find(way_id)
752 delete_way.version = way_version
753 delete_way.changeset_id = changeset_id
754 old_way.delete_with_history!(delete_way, user)
756 old_way.unshared_node_ids.each do |node_id|
758 node = Node.find(node_id)
759 delete_node = Node.new
760 delete_node.changeset_id = changeset_id
761 if node_id_version[node_id.to_s]
762 delete_node.version = node_id_version[node_id.to_s]
764 # in case the node wasn't passed (i.e. if it was previously removed
765 # from the way in Potlatch)
766 deleteitemrelations(user, changeset_id, node_id, 'node', node.version)
767 delete_node.version = node.version
769 node.delete_with_history!(delete_node, user)
773 rescue OSM::APIChangesetAlreadyClosedError => ex
774 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"]
775 rescue OSM::APIVersionMismatchError => ex
776 # Really need to check to see whether this is a server load issue, and the
777 # last version was in the same changeset, or belongs to the same user, then
778 # we can return something different
779 return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."]
780 rescue OSM::APIAlreadyDeletedError => ex
781 return [-1, "The way has already been deleted."]
782 rescue OSM::APIError => ex
783 # Some error that we don't specifically catch
784 return [-2, "Something really bad happened :-( ."]
788 # ====================================================================
791 # Remove a node or way from all relations
792 # This is only used by putway and deleteway when deleting nodes removed
793 # from a way (because Potlatch itself doesn't keep track of these -
796 def deleteitemrelations(user, changeset_id, objid, type, version) #:doc:
797 relations = RelationMember.find(:all,
798 :conditions => ['member_type = ? and member_id = ?', type, objid],
799 :include => :relation).collect { |rm| rm.relation }.uniq
801 relations.each do |rel|
802 rel.members.delete_if { |x| x[0] == type and x[1] == objid }
803 new_rel = Relation.new
804 new_rel.tags = rel.tags
805 new_rel.visible = rel.visible
806 new_rel.version = rel.version
807 new_rel.members = rel.members
808 new_rel.changeset_id = changeset_id
809 rel.update_from(new_rel, user)
814 # (can also be of form user:pass)
815 # When we are writing to the api, we need the actual user model,
816 # not just the id, hence this abstraction
818 def getuser(token) #:doc:
819 if (token =~ /^(.+)\:(.+)$/) then
820 user = User.authenticate(:username => $1, :password => $2)
822 user = User.authenticate(:token => token)
829 def sendresponse(results)
830 a,b=results.length.divmod(256)
831 render :content_type => "application/x-amf", :text => proc { |response, output|
832 # ** move amf writing loop into here -
833 # basically we read the messages in first (into an array of some sort),
834 # then iterate through that array within here, and do all the AMF writing
835 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
836 results.each do |k,v|
843 # ====================================================================
844 # Alternative SQL queries for getway/whichways
846 def sql_find_ways_in_area(xmin,ymin,xmax,ymax)
848 SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version
849 FROM current_way_nodes
850 INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
851 INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
852 WHERE current_nodes.visible=TRUE
853 AND current_ways.visible=TRUE
854 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
856 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
859 def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
862 SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version
864 LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
865 WHERE current_nodes.visible=TRUE
867 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
869 ActiveRecord::Base.connection.select_all(sql).each do |row|
871 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
872 poitags[n['k']]=n['v']
874 pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i]
879 def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
880 # ** It would be more Potlatchy to get relations for nodes within ways
881 # during 'getway', not here
883 SELECT DISTINCT cr.id AS relid,cr.version AS version
884 FROM current_relations cr
885 INNER JOIN current_relation_members crm ON crm.id=cr.id
886 INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node'
887 WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
889 unless way_ids.empty?
892 SELECT DISTINCT cr.id AS relid,cr.version AS version
893 FROM current_relations cr
894 INNER JOIN current_relation_members crm ON crm.id=cr.id
895 WHERE crm.member_type='way'
896 AND crm.member_id IN (#{way_ids.join(',')})
899 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
902 def sql_get_nodes_in_way(wayid)
905 SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id
906 FROM current_way_nodes,current_nodes
907 WHERE current_way_nodes.id=#{wayid.to_i}
908 AND current_way_nodes.node_id=current_nodes.id
909 AND current_nodes.visible=TRUE
912 ActiveRecord::Base.connection.select_all(sql).each do |row|
914 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
915 nodetags[n['k']]=n['v']
917 nodetags.delete('created_by')
918 points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags]
923 def sql_get_tags_in_way(wayid)
925 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
926 tags[row['k']]=row['v']
931 def sql_get_way_version(wayid)
932 ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")