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_write_availability
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)
116 when 'putway'; r=putway(renumberednodes,*args)
118 if r[1] != r[2] then renumberedways[r[1]] = r[2] end
119 results[index]=AMF.putdata(index,r)
120 when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
121 when 'deleteway'; results[index]=AMF.putdata(index,deleteway(*args))
122 when 'putpoi'; r=putpoi(*args)
123 if r[1] != r[2] then renumberednodes[r[1]] = r[2] end
124 results[index]=AMF.putdata(index,r)
125 when 'startchangeset'; results[index]=AMF.putdata(index,startchangeset(*args))
128 sendresponse(results)
133 # Start new changeset
135 def startchangeset(usertoken, cstags, closeid, closecomment)
136 user = getuser(usertoken)
137 if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
139 # close previous changeset and add comment
141 cs = Changeset.find(closeid)
142 cs.set_closed_time_now
143 if cs.user_id!=user.id
144 return -2,"You cannot close that changeset because you're not the person who opened it."
145 elsif closecomment.empty?
148 cs.tags['comment']=closecomment
153 # open a new changeset
157 # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
158 cs.created_at = Time.now
159 cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
164 # Return presets (default tags, localisation etc.):
165 # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
167 def getpresets() #:doc:
168 return POTLATCH_PRESETS
172 # Find all the ways, POI nodes (i.e. not part of ways), and relations
173 # in a given bounding box. Nodes are returned in full; ways and relations
176 # return is of the form:
178 # [[way_id, way_version], ...],
179 # [[node_id, lat, lon, [tags, ...], node_version], ...],
180 # [[rel_id, rel_version], ...]]
181 # where the ways are any visible ways which refer to any visible
182 # nodes in the bbox, nodes are any visible nodes in the bbox but not
183 # used in any way, rel is any relation which refers to either a way
184 # or node that we're returning.
185 def whichways(xmin, ymin, xmax, ymax) #:doc:
186 enlarge = [(xmax-xmin)/8,0.01].min
187 xmin -= enlarge; ymin -= enlarge
188 xmax += enlarge; ymax += enlarge
190 # check boundary is sane and area within defined
191 # see /config/application.yml
192 check_boundaries(xmin, ymin, xmax, ymax)
194 if POTLATCH_USE_SQL then
195 ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
196 points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
197 relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
199 # find the way ids in an area
200 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
201 ways = nodes_in_area.inject([]) { |sum, node|
202 visible_ways = node.ways.select { |w| w.visible? }
203 sum + visible_ways.collect { |w| [w.id,w.version] }
207 # find the node ids in an area that aren't part of ways
208 nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
209 points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
211 # find the relations used by those nodes and ways
212 relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
213 Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
214 relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
217 [0, ways, points, relations]
219 rescue Exception => err
220 [-2,"Sorry - I can't get the map for that area."]
223 # Find deleted ways in current bounding box (similar to whichways, but ways
224 # with a deleted node only - not POIs or relations).
226 def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
227 enlarge = [(xmax-xmin)/8,0.01].min
228 xmin -= enlarge; ymin -= enlarge
229 xmax += enlarge; ymax += enlarge
231 # check boundary is sane and area within defined
232 # see /config/application.yml
234 check_boundaries(xmin, ymin, xmax, ymax)
235 rescue Exception => err
236 return [-2,"Sorry - I can't get the map for that area."]
239 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
240 way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
245 # Get a way including nodes and tags.
246 # Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number.
248 def getway(wayid) #:doc:
249 if POTLATCH_USE_SQL then
250 points = sql_get_nodes_in_way(wayid)
251 tags = sql_get_tags_in_way(wayid)
252 version = sql_get_way_version(wayid)
254 # Ideally we would do ":include => :nodes" here but if we do that
255 # then rails only seems to return the first copy of a node when a
256 # way includes a node more than once
258 way = Way.find(wayid)
259 rescue ActiveRecord::RecordNotFound
263 # check case where way has been deleted or doesn't exist
264 return [wayid,[],{}] if way.nil? or !way.visible
266 points = way.nodes.collect do |node|
268 nodetags.delete('created_by')
269 [node.lon, node.lat, node.id, nodetags, node.version]
272 version = way.version
275 [wayid, points, tags, version]
278 # Get an old version of a way, and all constituent nodes.
280 # For undelete (version<0), always uses the most recent version of each node,
281 # even if it's moved. For revert (version >= 0), uses the node in existence
282 # at the time, generating a new id if it's still visible and has been moved/
288 # 2. array of points,
291 # 5. is this the current, visible version? (boolean)
293 def getway_old(id, timestamp) #:doc:
296 old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
297 points = old_way.get_nodes_undelete unless old_way.nil?
300 timestamp = DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")
301 old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
302 points = old_way.get_nodes_revert(timestamp) unless old_way.nil?
304 return [-1, "Sorry, the way was deleted at that time - please revert to a previous version."]
309 # *** FIXME: shouldn't this be returning an error?
310 return [-1, id, [], {}, -1,0]
313 old_way.tags['history'] = "Retrieved from v#{old_way.version}"
314 return [0, id, points, old_way.tags, old_way.version, (curway.version==old_way.version and curway.visible)]
318 # Find history of a way.
319 # Returns 'way', id, and an array of previous versions:
320 # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
321 # - now [timestamp,user,uid]
323 # Heuristic: Find all nodes that have ever been part of the way;
324 # get a list of their revision dates; add revision dates of the way;
325 # sort and collapse list (to within 2 seconds); trim all dates before the
326 # start date of the way.
328 def getway_history(wayid) #:doc:
331 # Find list of revision dates for way and all constituent nodes
334 Way.find(wayid).old_ways.collect do |a|
335 revdates.push(a.timestamp)
336 unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
338 Node.find(n).old_nodes.collect do |o|
339 revdates.push(o.timestamp)
340 unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
344 waycreated=revdates[0]
349 # Remove any dates (from nodes) before first revision date of way
350 revdates.delete_if { |d| d<waycreated }
351 # Remove any elements where 2 seconds doesn't elapse before next one
352 revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
353 # Collect all in one nested array
354 revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
356 return ['way',wayid,revdates]
357 rescue ActiveRecord::RecordNotFound
358 return ['way', wayid, []]
362 # Find history of a node. Returns 'node', id, and an array of previous versions as above.
364 def getnode_history(nodeid) #:doc:
366 history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
367 [old_node.timestamp.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
369 return ['node', nodeid, history]
370 rescue ActiveRecord::RecordNotFound
371 return ['node', nodeid, []]
376 user_object = obj.changeset.user
377 user = user_object.data_public? ? user_object.display_name : 'anonymous'
378 uid = user_object.data_public? ? user_object.id : 0
382 # Find GPS traces with specified name/id.
383 # Returns array listing GPXs, each one comprising id, name and description.
385 def findgpx(searchterm, usertoken)
386 user = getuser(usertoken)
387 if !uid then return -1,"You must be logged in to search for GPX traces." end
390 if searchterm.to_i>0 then
391 gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
393 gpxs.push([gpx.id, gpx.name, gpx.description])
396 Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
397 gpxs.push([gpx.id, gpx.name, gpx.description])
403 # Get a relation with all tags and members.
407 # 2. list of members,
410 def getrelation(relid) #:doc:
412 rel = Relation.find(relid)
413 rescue ActiveRecord::RecordNotFound
414 return [relid, {}, []]
417 return [relid, {}, [], nil] if rel.nil? or !rel.visible
418 [relid, rel.tags, rel.members, rel.version]
421 # Find relations with specified name/id.
422 # Returns array of relations, each in same form as getrelation.
424 def findrelations(searchterm)
426 if searchterm.to_i>0 then
427 rel = Relation.find(searchterm.to_i)
428 if rel and rel.visible then
429 rels.push([rel.id, rel.tags, rel.members])
432 RelationTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", searchterm] ).each do |t|
433 if t.relation.visible then
434 rels.push([t.relation.id, t.relation.tags, t.relation.members])
444 # 1. original relation id (unchanged),
445 # 2. new relation id.
447 def putrelation(renumberednodes, renumberedways, usertoken, changeset, version, relid, tags, members, visible) #:doc:
448 user = getuser(usertoken)
449 if !user then return -1,"You are not logged in, so the relation could not be saved." end
452 visible = (visible.to_i != 0)
456 Relation.transaction do
457 # create a new relation, or find the existing one
459 relation = Relation.find(relid)
461 # We always need a new node, based on the data that has been sent to us
462 new_relation = Relation.new
464 # check the members are all positive, and correctly type
469 mid = renumberednodes[mid] if m[0] == 'node'
470 mid = renumberedways[mid] if m[0] == 'way'
473 typedmembers << [m[0], mid, m[2]]
477 # assign new contents
478 new_relation.members = typedmembers
479 new_relation.tags = tags
480 new_relation.visible = visible
481 new_relation.changeset_id = changeset
482 new_relation.version = version
486 # We're creating the node
487 new_relation.create_with_history(user)
489 # We're updating the node
490 relation.update_from(new_relation, user)
492 # We're deleting the node
493 relation.delete_with_history!(new_relation, user)
498 return [0, relid, new_relation.id, new_relation.version]
500 return [0, relid, relation.id, relation.version]
502 rescue OSM::APIChangesetAlreadyClosedError => ex
503 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}."]
504 rescue OSM::APIVersionMismatchError => ex
505 # Really need to check to see whether this is a server load issue, and the
506 # last version was in the same changeset, or belongs to the same user, then
507 # we can return something different
508 return [-3, "You have taken too long to edit, please reload the area."]
509 rescue OSM::APIAlreadyDeletedError => ex
510 return [-1, "The object has already been deleted"]
511 rescue OSM::APIError => ex
512 # Some error that we don't specifically catch
513 return [-2, "Something really bad happened :-()"]
516 # Save a way to the database, including all nodes. Any nodes in the previous
517 # version and no longer used are deleted.
520 # 0. hash of renumbered nodes (added by amf_controller)
521 # 1. current user token (for authentication)
522 # 2. current changeset
525 # 5. list of nodes in way
526 # 6. hash of way tags
527 # 7. array of nodes to change (each one is [lon,lat,id,version,tags])
530 # 0. '0' (code for success),
531 # 1. original way id (unchanged),
533 # 3. hash of renumbered nodes (old id=>new id),
535 # 5. hash of node versions (node=>version)
537 def putway(renumberednodes, usertoken, changeset, wayversion, originalway, pointlist, attributes, nodes) #:doc:
541 user = getuser(usertoken)
542 if !user then return -1,"You are not logged in, so the way could not be saved." end
543 if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
545 originalway = originalway.to_i
546 pointlist.collect! {|a| a.to_i }
548 way=nil # this is returned, so scope it outside the transaction
552 # -- Get unique nodes
557 way = Way.find(originalway)
558 uniques = way.unshared_node_ids
561 #-- Update each changed node
568 if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end
569 if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
570 if renumberednodes[id] then id = renumberednodes[id] end
573 node.changeset_id = changeset
577 node.tags.delete('created_by')
578 node.version = version
580 # We're creating the node
581 node.create_with_history(user)
582 renumberednodes[id] = node.id
583 nodeversions[node.id] = node.version
585 # We're updating an existing node
586 previous=Node.find(id)
587 previous.update_from(node, user)
588 nodeversions[previous.id] = previous.version
592 # -- Save revised way
594 pointlist.collect! {|a|
595 renumberednodes[a] ? renumberednodes[a]:a
598 new_way.tags = attributes
599 new_way.nds = pointlist
600 new_way.changeset_id = changeset
601 new_way.version = wayversion
603 new_way.create_with_history(user)
604 way=new_way # so we can get way.id and way.version
605 elsif way.tags!=attributes or way.nds!=pointlist or !way.visible?
606 way.update_from(new_way, user)
609 # -- Delete any unique nodes no longer used
611 uniques=uniques-pointlist
615 new_node.changeset_id = changeset
616 new_node.version = node.version
617 node.delete_with_history!(new_node, user)
622 [0, originalway, way.id, renumberednodes, way.version, nodeversions]
623 rescue OSM::APIChangesetAlreadyClosedError => ex
624 return [-2, "Sorry, your changeset #{ex.changeset.id} has been closed (at #{ex.changeset.closed_at})."]
625 rescue OSM::APIVersionMismatchError => ex
626 # Really need to check to see whether this is a server load issue, and the
627 # last version was in the same changeset, or belongs to the same user, then
628 # we can return something different
629 return [-3, "Sorry, someone else has changed this way since you started editing - please reload the area"]
630 rescue OSM::APITooManyWayNodesError => ex
631 return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed."]
632 rescue OSM::APIAlreadyDeletedError => ex
633 return [-1, "The object has already been deleted."]
634 rescue OSM::APIError => ex
635 # Some error that we don't specifically catch
636 return [-2, "Something really bad happened :-(."]
639 # Save POI to the database.
640 # Refuses save if the node has since become part of a way.
641 # Returns array with:
643 # 1. original node id (unchanged),
647 def putpoi(usertoken, changeset, version, id, lon, lat, tags, visible) #:doc:
648 user = getuser(usertoken)
649 if !user then return -1,"You are not logged in, so the point could not be saved." end
652 visible = (visible.to_i == 1)
660 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
661 deleteitemrelations(id, 'node')
664 # We always need a new node, based on the data that has been sent to us
667 new_node.changeset_id = changeset
668 new_node.version = version
673 # We're creating the node
674 new_node.create_with_history(user)
676 # We're updating the node
677 node.update_from(new_node, user)
679 # We're deleting the node
680 node.delete_with_history!(new_node, user)
685 return [0, id, new_node.id, new_node.version]
687 return [0, id, node.id, node.version]
689 rescue OSM::APIChangesetAlreadyClosedError => ex
690 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"]
691 rescue OSM::APIVersionMismatchError => ex
692 # Really need to check to see whether this is a server load issue, and the
693 # last version was in the same changeset, or belongs to the same user, then
694 # we can return something different
695 return [-3, "You have taken too long to edit, please reload the area"]
696 rescue OSM::APIAlreadyDeletedError => ex
697 return [-1, "The object has already been deleted"]
698 rescue OSM::APIError => ex
699 # Some error that we don't specifically catch
700 return [-2, "Something really bad happened :-()"]
703 # Read POI from database
704 # (only called on revert: POIs are usually read by whichways).
706 # Returns array of id, long, lat, hash of tags, version.
708 def getpoi(id,timestamp) #:doc:
709 if timestamp == '' then
712 n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
716 return [n.id, n.lon, n.lat, n.tags, n.version]
718 return [nil, nil, nil, {}, nil]
722 # Delete way and all constituent nodes. Also removes from any relations.
726 # * the id of the way to change
727 # * the version of the way that was downloaded
728 # * a hash of the id and versions of all the nodes that are in the way, if any
729 # of the nodes have been changed by someone else then, there is a problem!
730 # Returns 0 (success), unchanged way id.
732 def deleteway(usertoken, changeset_id, way_id, way_version, node_id_version) #:doc:
733 user = getuser(usertoken)
734 unless user then return -1,"You are not logged in, so the way could not be deleted." end
737 # Need a transaction so that if one item fails to delete, the whole delete fails.
741 old_way = Way.find(way_id)
743 delete_way.version = way_version
744 delete_way.changeset_id = changeset_id
745 old_way.delete_with_history!(delete_way, user)
747 # FIXME: would be good not to make two history entries when removing
748 # two nodes from the same relation
749 #old_way.unshared_node_ids.each do |n|
750 # deleteitemrelations(n, 'node')
752 #deleteitemrelations(way_id, 'way')
754 #way.delete_with_relations_and_nodes_and_history(changeset_id.to_i)
755 old_way.unshared_node_ids.each do |node_id|
757 node = Node.find(node_id)
758 delete_node = Node.new
759 delete_node.changeset_id = changeset_id
760 delete_node.version = node_id_version[node_id.to_s]
761 node.delete_with_history!(delete_node, user)
765 rescue OSM::APIChangesetAlreadyClosedError => ex
766 return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"]
767 rescue OSM::APIVersionMismatchError => ex
768 # Really need to check to see whether this is a server load issue, and the
769 # last version was in the same changeset, or belongs to the same user, then
770 # we can return something different
771 return [-3, "You have taken too long to edit, please reload the area"]
772 rescue OSM::APIAlreadyDeletedError => ex
773 return [-1, "The object has already been deleted"]
774 rescue OSM::APIError => ex
775 # Some error that we don't specifically catch
776 return [-2, "Something really bad happened :-()"]
780 # ====================================================================
783 # Remove a node or way from all relations
784 # FIXME needs version, changeset, and user
785 # Fixme make sure this doesn't depend on anything and delete this, as potlatch
786 # itself should remove the relations first
787 def deleteitemrelations(objid, type, version) #:doc:
788 relations = RelationMember.find(:all,
789 :conditions => ['member_type = ? and member_id = ?', type, objid],
790 :include => :relation).collect { |rm| rm.relation }.uniq
792 relations.each do |rel|
793 rel.members.delete_if { |x| x[0] == type and x[1] == objid }
794 # FIXME need to create the new relation
795 new_rel = Relation.new
796 new_rel.version = version
797 new_rel.members = members
798 new_rel.changeset = changeset
799 rel.delete_with_history(new_rel, user)
803 # Break out node tags into a hash
804 # (should become obsolete as of API 0.6)
806 def tagstring_to_hash(a) #:doc:
808 Tags.split(a) do |k, v|
815 # (can also be of form user:pass)
816 # When we are writing to the api, we need the actual user model,
817 # not just the id, hence this abstraction
819 def getuser(token) #:doc:
820 if (token =~ /^(.+)\:(.+)$/) then
821 user = User.authenticate(:username => $1, :password => $2)
823 user = User.authenticate(:token => token)
830 def sendresponse(results)
831 a,b=results.length.divmod(256)
832 render :content_type => "application/x-amf", :text => proc { |response, output|
833 # ** move amf writing loop into here -
834 # basically we read the messages in first (into an array of some sort),
835 # then iterate through that array within here, and do all the AMF writing
836 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
837 results.each do |k,v|
844 # ====================================================================
845 # Alternative SQL queries for getway/whichways
847 def sql_find_ways_in_area(xmin,ymin,xmax,ymax)
849 SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version
850 FROM current_way_nodes
851 INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
852 INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
853 WHERE current_nodes.visible=TRUE
854 AND current_ways.visible=TRUE
855 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
857 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
860 def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
863 SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version
865 LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
866 WHERE current_nodes.visible=TRUE
868 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
870 ActiveRecord::Base.connection.select_all(sql).each do |row|
872 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
873 poitags[n['k']]=n['v']
875 pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i]
880 def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
881 # ** It would be more Potlatchy to get relations for nodes within ways
882 # during 'getway', not here
884 SELECT DISTINCT cr.id AS relid,cr.version AS version
885 FROM current_relations cr
886 INNER JOIN current_relation_members crm ON crm.id=cr.id
887 INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node'
888 WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
890 unless way_ids.empty?
893 SELECT DISTINCT cr.id AS relid,cr.version AS version
894 FROM current_relations cr
895 INNER JOIN current_relation_members crm ON crm.id=cr.id
896 WHERE crm.member_type='way'
897 AND crm.member_id IN (#{way_ids.join(',')})
900 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
903 def sql_get_nodes_in_way(wayid)
906 SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id
907 FROM current_way_nodes,current_nodes
908 WHERE current_way_nodes.id=#{wayid.to_i}
909 AND current_way_nodes.node_id=current_nodes.id
910 AND current_nodes.visible=TRUE
913 ActiveRecord::Base.connection.select_all(sql).each do |row|
915 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
916 nodetags[n['k']]=n['v']
918 nodetags.delete('created_by')
919 points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags]
924 def sql_get_tags_in_way(wayid)
926 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
927 tags[row['k']]=row['v']
932 def sql_get_way_version(wayid)
933 ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")