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
29 # return(-3,["type",v],id) <-- version conflict
30 # return(-4,"type",id) <-- object not found
31 # -5 indicates the method wasn't called (due to a previous error)
33 # To write to the Rails log, use logger.info("message").
36 # * version conflict when POIs and ways are reverted
38 class AmfController < ApplicationController
41 skip_before_filter :verify_authenticity_token
42 before_filter :check_api_writable
44 # Main AMF handlers: process the raw AMF string (using AMF library) and
45 # calls each action (private method) accordingly.
49 self.content_type = Mime::AMF
50 self.response_body = Dispatcher.new(request.raw_post) do |message,*args|
51 logger.info("Executing AMF #{message}(#{args.join(',')})")
54 when 'getpresets'; result = getpresets(*args)
55 when 'whichways'; result = whichways(*args)
56 when 'whichways_deleted'; result = whichways_deleted(*args)
57 when 'getway'; result = getway(args[0].to_i)
58 when 'getrelation'; result = getrelation(args[0].to_i)
59 when 'getway_old'; result = getway_old(args[0].to_i,args[1])
60 when 'getway_history'; result = getway_history(args[0].to_i)
61 when 'getnode_history'; result = getnode_history(args[0].to_i)
62 when 'findgpx'; result = findgpx(*args)
63 when 'findrelations'; result = findrelations(*args)
64 when 'getpoi'; result = getpoi(*args)
72 renumberednodes = {} # Shared across repeated putways
73 renumberedways = {} # Shared across repeated putways
74 err = false # Abort batch on error
77 self.content_type = Mime::AMF
78 self.response_body = Dispatcher.new(request.raw_post) do |message,*args|
79 logger.info("Executing AMF #{message}")
85 when 'putway'; orn = renumberednodes.dup
86 result = putway(renumberednodes, *args)
87 result[4] = renumberednodes.reject { |k,v| orn.has_key?(k) }
88 if result[0] == 0 and result[2] != result[3] then renumberedways[result[2]] = result[3] end
89 when 'putrelation'; result = putrelation(renumberednodes, renumberedways, *args)
90 when 'deleteway'; result = deleteway(*args)
91 when 'putpoi'; result = putpoi(*args)
92 if result[0] == 0 and result[2] != result[3] then renumberednodes[result[2]] = result[3] end
93 when 'startchangeset'; result = startchangeset(*args)
96 err = true if result[0] == -3 # If a conflict is detected, don't execute any more writes
105 def amf_handle_error(call,rootobj,rootid)
107 rescue OSM::APIAlreadyDeletedError => ex
108 return [-4, ex.object, ex.object_id]
109 rescue OSM::APIVersionMismatchError => ex
110 return [-3, [rootobj, rootid], [ex.type.downcase, ex.id, ex.latest]]
111 rescue OSM::APIUserChangesetMismatchError => ex
113 rescue OSM::APIBadBoundingBox => ex
114 return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"]
115 rescue OSM::APIError => ex
117 rescue Exception => ex
118 return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"]
121 def amf_handle_error_with_timeout(call,rootobj,rootid)
122 amf_handle_error(call,rootobj,rootid) do
123 OSM::Timer.timeout(API_TIMEOUT, OSM::APITimeoutError) do
129 # Start new changeset
130 # Returns success_code,success_message,changeset id
132 def startchangeset(usertoken, cstags, closeid, closecomment, opennew)
133 amf_handle_error("'startchangeset'",nil,nil) do
134 user = getuser(usertoken)
135 if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
136 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
137 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
140 if !tags_ok(cstags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
141 cstags = strip_non_xml_chars cstags
144 # close previous changeset and add comment
146 cs = Changeset.find(closeid.to_i)
147 cs.set_closed_time_now
148 if cs.user_id!=user.id
149 raise OSM::APIUserChangesetMismatchError.new
150 elsif closecomment.empty?
153 cs.tags['comment']=closecomment
154 # in case closecomment has chars not allowed in xml
155 cs.tags = strip_non_xml_chars cs.tags
160 # open a new changeset
165 if !closecomment.empty?
166 cs.tags['comment']=closecomment
167 # in case closecomment has chars not allowed in xml
168 cs.tags = strip_non_xml_chars cs.tags
170 # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
171 cs.created_at = Time.now.getutc
172 cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
181 # Return presets (default tags, localisation etc.):
182 # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
184 def getpresets(usertoken,lang) #:doc:
185 user = getuser(usertoken)
187 if user && !user.languages.empty?
188 request.user_preferred_languages = user.languages
191 lang = request.compatible_language_from(getlocales)
192 (real_lang, localised) = getlocalized(lang)
194 # Tell Potlatch what language it's using
195 localised["__potlatch_locale"] = real_lang
197 # Get help from i18n but delete it so we won't pass it around
199 help = localised["help_html"]
200 localised.delete("help_html")
202 # Populate icon names
203 POTLATCH_PRESETS[10].each { |id|
204 POTLATCH_PRESETS[11][id] = localised["preset_icon_#{id}"]
205 localised.delete("preset_icon_#{id}")
208 return POTLATCH_PRESETS+[localised,help]
211 def getlocalized(lang)
212 # What we end up actually using. Reported in Potlatch's created_by=* string
215 # Load English defaults
216 en = YAML::load(File.open("#{Rails.root}/config/potlatch/locales/en.yml"))["en"]
219 return [loaded_lang, en]
221 # Use English as a fallback
223 other = YAML::load(File.open("#{Rails.root}/config/potlatch/locales/#{lang}.yml"))[lang]
229 # We have to return a flat list and some of the keys won't be
230 # translated (probably)
231 return [loaded_lang, en.merge(other)]
236 # Find all the ways, POI nodes (i.e. not part of ways), and relations
237 # in a given bounding box. Nodes are returned in full; ways and relations
240 # return is of the form:
241 # [success_code, success_message,
242 # [[way_id, way_version], ...],
243 # [[node_id, lat, lon, [tags, ...], node_version], ...],
244 # [[rel_id, rel_version], ...]]
245 # where the ways are any visible ways which refer to any visible
246 # nodes in the bbox, nodes are any visible nodes in the bbox but not
247 # used in any way, rel is any relation which refers to either a way
248 # or node that we're returning.
249 def whichways(xmin, ymin, xmax, ymax) #:doc:
250 amf_handle_error_with_timeout("'whichways'",nil,nil) do
251 enlarge = [(xmax-xmin)/8,0.01].min
252 xmin -= enlarge; ymin -= enlarge
253 xmax += enlarge; ymax += enlarge
255 # check boundary is sane and area within defined
256 # see /config/application.yml
257 bbox = BoundingBox.new(xmin, ymin, xmax, ymax)
258 bbox.check_boundaries
261 if POTLATCH_USE_SQL then
262 ways = sql_find_ways_in_area(bbox)
263 points = sql_find_pois_in_area(bbox)
264 relations = sql_find_relations_in_area_and_ways(bbox, ways.collect {|x| x[0]})
266 # find the way ids in an area
267 nodes_in_area = Node.bbox(bbox).visible.includes(:ways)
268 ways = nodes_in_area.inject([]) { |sum, node|
269 visible_ways = node.ways.select { |w| w.visible? }
270 sum + visible_ways.collect { |w| [w.id,w.version] }
274 # find the node ids in an area that aren't part of ways
275 nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
276 points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
278 # find the relations used by those nodes and ways
279 relations = Relation.nodes(nodes_in_area.collect { |n| n.id }).visible +
280 Relation.ways(ways.collect { |w| w[0] }).visible
281 relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
284 [0, '', ways, points, relations]
288 # Find deleted ways in current bounding box (similar to whichways, but ways
289 # with a deleted node only - not POIs or relations).
291 def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
292 amf_handle_error_with_timeout("'whichways_deleted'",nil,nil) do
293 enlarge = [(xmax-xmin)/8,0.01].min
294 xmin -= enlarge; ymin -= enlarge
295 xmax += enlarge; ymax += enlarge
297 # check boundary is sane and area within defined
298 # see /config/application.yml
299 bbox = BoundingBox.new(xmin, ymin, xmax, ymax)
300 bbox.check_boundaries
303 nodes_in_area = Node.bbox(bbox).joins(:ways_via_history).where(:current_ways => { :visible => false })
304 way_ids = nodes_in_area.collect { |node| node.ways_via_history.invisible.collect { |way| way.id } }.flatten.uniq
310 # Get a way including nodes and tags.
311 # Returns the way id, a Potlatch-style array of points, a hash of tags, the version number, and the user ID.
313 def getway(wayid) #:doc:
314 amf_handle_error_with_timeout("'getway' #{wayid}" ,'way',wayid) do
315 if POTLATCH_USE_SQL then
316 points = sql_get_nodes_in_way(wayid)
317 tags = sql_get_tags_in_way(wayid)
318 version = sql_get_way_version(wayid)
319 uid = sql_get_way_user(wayid)
321 # Ideally we would do ":include => :nodes" here but if we do that
322 # then rails only seems to return the first copy of a node when a
323 # way includes a node more than once
324 way = Way.where(:id => wayid).preload(:nodes => :node_tags).first
326 # check case where way has been deleted or doesn't exist
327 return [-4, 'way', wayid] if way.nil? or !way.visible
329 points = way.nodes.collect do |node|
331 nodetags.delete('created_by')
332 [node.lon, node.lat, node.id, nodetags, node.version]
335 version = way.version
336 uid = way.changeset.user.id
339 [0, '', wayid, points, tags, version, uid]
343 # Get an old version of a way, and all constituent nodes.
345 # For undelete (version<0), always uses the most recent version of each node,
346 # even if it's moved. For revert (version >= 0), uses the node in existence
347 # at the time, generating a new id if it's still visible and has been moved/
353 # 2. array of points,
356 # 5. is this the current, visible version? (boolean)
358 def getway_old(id, timestamp) #:doc:
359 amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}", 'way',id) do
362 old_way = OldWay.where(:visible => true, :way_id => id).unredacted.order("version DESC").first
363 points = old_way.get_nodes_undelete unless old_way.nil?
367 timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
368 old_way = OldWay.where("way_id = ? AND timestamp <= ?", id, timestamp).unredacted.order("timestamp DESC").first
370 points = old_way.get_nodes_revert(timestamp)
372 return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id]
376 # thrown by date parsing method. leave old_way as nil for
377 # the error handler below.
382 return [-1, "Sorry, the server could not find a way at that time.", id]
385 old_way.tags['history'] = "Retrieved from v#{old_way.version}"
386 return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
391 # Find history of a way.
392 # Returns 'way', id, and an array of previous versions:
393 # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
394 # - now [timestamp,user,uid]
396 # Heuristic: Find all nodes that have ever been part of the way;
397 # get a list of their revision dates; add revision dates of the way;
398 # sort and collapse list (to within 2 seconds); trim all dates before the
399 # start date of the way.
401 def getway_history(wayid) #:doc:
403 # Find list of revision dates for way and all constituent nodes
406 Way.find(wayid).old_ways.unredacted.collect do |a|
407 revdates.push(a.timestamp)
408 unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
410 Node.find(n).old_nodes.unredacted.collect do |o|
411 revdates.push(o.timestamp)
412 unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
416 waycreated=revdates[0]
421 # Remove any dates (from nodes) before first revision date of way
422 revdates.delete_if { |d| d<waycreated }
423 # Remove any elements where 2 seconds doesn't elapse before next one
424 revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
425 # Collect all in one nested array
426 revdates.collect! {|d| [d.succ.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
429 return ['way', wayid, revdates]
430 rescue ActiveRecord::RecordNotFound
431 return ['way', wayid, []]
435 # Find history of a node. Returns 'node', id, and an array of previous versions as above.
437 def getnode_history(nodeid) #:doc:
439 history = Node.find(nodeid).old_nodes.unredacted.reverse.collect do |old_node|
440 [old_node.timestamp.succ.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
442 return ['node', nodeid, history]
443 rescue ActiveRecord::RecordNotFound
444 return ['node', nodeid, []]
449 user_object = obj.changeset.user
450 user = user_object.data_public? ? user_object.display_name : 'anonymous'
451 uid = user_object.data_public? ? user_object.id : 0
455 # Find GPS traces with specified name/id.
456 # Returns array listing GPXs, each one comprising id, name and description.
458 def findgpx(searchterm, usertoken)
459 amf_handle_error_with_timeout("'findgpx'" ,nil,nil) do
460 user = getuser(usertoken)
461 if !user then return -1,"You must be logged in to search for GPX traces." end
462 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
464 query = Trace.visible_to(user)
465 if searchterm.to_i > 0 then
466 query = query.where(:id => searchterm.to_i)
468 query = query.where("MATCH(name) AGAINST (?)", searchterm).limit(21)
470 gpxs = query.collect do |gpx|
471 [gpx.id, gpx.name, gpx.description]
477 # Get a relation with all tags and members.
483 # 4. list of members,
486 def getrelation(relid) #:doc:
487 amf_handle_error("'getrelation' #{relid}" ,'relation',relid) do
488 rel = Relation.where(:id => relid).first
490 return [-4, 'relation', relid] if rel.nil? or !rel.visible
491 [0, '', relid, rel.tags, rel.members, rel.version]
495 # Find relations with specified name/id.
496 # Returns array of relations, each in same form as getrelation.
498 def findrelations(searchterm)
500 if searchterm.to_i>0 then
501 rel = Relation.where(:id => searchterm.to_i).first
502 if rel and rel.visible then
503 rels.push([rel.id, rel.tags, rel.members, rel.version])
506 RelationTag.where("v like ?", "%#{searchterm}%").limit(11).each do |t|
507 if t.relation.visible then
508 rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
518 # 1. original relation id (unchanged),
519 # 2. new relation id,
522 def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
523 amf_handle_error("'putrelation' #{relid}" ,'relation',relid) do
524 user = getuser(usertoken)
525 if !user then return -1,"You are not logged in, so the relation could not be saved." end
526 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
527 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
529 if !tags_ok(tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
530 tags = strip_non_xml_chars tags
533 visible = (visible.to_i != 0)
537 Relation.transaction do
538 # create a new relation, or find the existing one
540 relation = Relation.find(relid)
542 # We always need a new node, based on the data that has been sent to us
543 new_relation = Relation.new
545 # check the members are all positive, and correctly type
550 mid = renumberednodes[mid] if m[0] == 'Node'
551 mid = renumberedways[mid] if m[0] == 'Way'
554 typedmembers << [m[0], mid, m[2]]
558 # assign new contents
559 new_relation.members = typedmembers
560 new_relation.tags = tags
561 new_relation.visible = visible
562 new_relation.changeset_id = changeset_id
563 new_relation.version = version
566 # We're creating the relation
567 new_relation.create_with_history(user)
569 # We're updating the relation
570 new_relation.id = relid
571 relation.update_from(new_relation, user)
573 # We're deleting the relation
574 new_relation.id = relid
575 relation.delete_with_history!(new_relation, user)
580 return [0, '', relid, new_relation.id, new_relation.version]
582 return [0, '', relid, relid, relation.version]
587 # Save a way to the database, including all nodes. Any nodes in the previous
588 # version and no longer used are deleted.
591 # 0. hash of renumbered nodes (added by amf_controller)
592 # 1. current user token (for authentication)
593 # 2. current changeset
596 # 5. list of nodes in way
597 # 6. hash of way tags
598 # 7. array of nodes to change (each one is [lon,lat,id,version,tags]),
599 # 8. hash of nodes to delete (id->version).
602 # 0. '0' (code for success),
604 # 2. original way id (unchanged),
606 # 4. hash of renumbered nodes (old id=>new id),
608 # 6. hash of node versions (node=>version)
610 def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc:
611 amf_handle_error("'putway' #{originalway}" ,'way',originalway) do
614 user = getuser(usertoken)
615 if !user then return -1,"You are not logged in, so the way could not be saved." end
616 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
617 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
619 if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
621 if !tags_ok(attributes) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
622 attributes = strip_non_xml_chars attributes
624 originalway = originalway.to_i
625 pointlist.collect! {|a| a.to_i }
627 way=nil # this is returned, so scope it outside the transaction
631 # -- Update each changed node
639 if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end
640 if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
641 if renumberednodes[id] then id = renumberednodes[id] end
644 node.changeset_id = changeset_id
649 # fixup node tags in a way as well
650 if !tags_ok(node.tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
651 node.tags = strip_non_xml_chars node.tags
653 node.tags.delete('created_by')
654 node.version = version
656 # We're creating the node
657 node.create_with_history(user)
658 renumberednodes[id] = node.id
659 nodeversions[node.id] = node.version
661 # We're updating an existing node
662 previous=Node.find(id)
664 previous.update_from(node, user)
665 nodeversions[previous.id] = previous.version
669 # -- Save revised way
671 pointlist.collect! {|a|
672 renumberednodes[a] ? renumberednodes[a]:a
675 new_way.tags = attributes
676 new_way.nds = pointlist
677 new_way.changeset_id = changeset_id
678 new_way.version = wayversion
680 new_way.create_with_history(user)
681 way=new_way # so we can get way.id and way.version
683 way = Way.find(originalway)
684 if way.tags!=attributes or way.nds!=pointlist or !way.visible?
685 new_way.id=originalway
686 way.update_from(new_way, user)
690 # -- Delete unwanted nodes
692 deletednodes.each do |id,v|
693 node = Node.find(id.to_i)
695 new_node.changeset_id = changeset_id
696 new_node.version = v.to_i
697 new_node.id = id.to_i
699 node.delete_with_history!(new_node, user)
700 rescue OSM::APIPreconditionFailedError => ex
701 # We don't do anything here as the node is being used elsewhere
702 # and we don't want to delete it
708 [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
712 # Save POI to the database.
713 # Refuses save if the node has since become part of a way.
714 # Returns array with:
716 # 1. success message,
717 # 2. original node id (unchanged),
721 def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
722 amf_handle_error("'putpoi' #{id}", 'node',id) do
723 user = getuser(usertoken)
724 if !user then return -1,"You are not logged in, so the point could not be saved." end
725 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
726 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
728 if !tags_ok(tags) then return -1,"One of the tags is invalid. Linux users may need to upgrade to Flash Player 10.1." end
729 tags = strip_non_xml_chars tags
732 visible = (visible.to_i == 1)
740 unless node.ways.empty? then return -1,"Point #{id} has since become part of a way, so you cannot save it as a POI.",id,id,version end
743 # We always need a new node, based on the data that has been sent to us
746 new_node.changeset_id = changeset_id
747 new_node.version = version
752 # We're creating the node
753 new_node.create_with_history(user)
755 # We're updating the node
757 node.update_from(new_node, user)
759 # We're deleting the node
761 node.delete_with_history!(new_node, user)
767 return [0, '', id, new_node.id, new_node.version]
769 return [0, '', id, node.id, node.version]
774 # Read POI from database
775 # (only called on revert: POIs are usually read by whichways).
777 # Returns array of id, long, lat, hash of tags, (current) version.
779 def getpoi(id,timestamp) #:doc:
780 amf_handle_error("'getpoi' #{id}" ,'node',id) do
784 unless timestamp == ''
785 n = OldNode.where("node_id = ? AND timestamp <= ?", id, timestamp).unredacted.order("timestamp DESC").first
789 return [0, '', n.id, n.lon, n.lat, n.tags, v]
791 return [-4, 'node', id]
796 # Delete way and all constituent nodes.
800 # * the id of the way to change
801 # * the version of the way that was downloaded
802 # * a hash of the id and versions of all the nodes that are in the way, if any
803 # of the nodes have been changed by someone else then, there is a problem!
804 # Returns 0 (success), unchanged way id, new way version, new node versions.
806 def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:
807 amf_handle_error("'deleteway' #{way_id}" ,'way', way_id) do
808 user = getuser(usertoken)
809 unless user then return -1,"You are not logged in, so the way could not be deleted." end
810 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
811 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
815 old_way=nil # returned, so scope it outside the transaction
816 # Need a transaction so that if one item fails to delete, the whole delete fails.
821 old_way = Way.find(way_id)
823 delete_way.version = way_version
824 delete_way.changeset_id = changeset_id
825 delete_way.id = way_id
826 old_way.delete_with_history!(delete_way, user)
828 # -- Delete unwanted nodes
830 deletednodes.each do |id,v|
831 node = Node.find(id.to_i)
833 new_node.changeset_id = changeset_id
834 new_node.version = v.to_i
835 new_node.id = id.to_i
837 node.delete_with_history!(new_node, user)
838 nodeversions[node.id]=node.version
839 rescue OSM::APIPreconditionFailedError => ex
840 # We don't do anything with the exception as the node is in use
841 # elsewhere and we don't want to delete it
846 [0, '', way_id, old_way.version, nodeversions]
851 # ====================================================================
855 # (can also be of form user:pass)
856 # When we are writing to the api, we need the actual user model,
857 # not just the id, hence this abstraction
859 def getuser(token) #:doc:
860 if (token =~ /^(.+)\:(.+)$/) then
861 user = User.authenticate(:username => $1, :password => $2)
863 user = User.authenticate(:token => token)
869 Dir.glob("#{Rails.root}/config/potlatch/locales/*").collect { |f| File.basename(f, ".yml") }
873 # check that all key-value pairs are valid UTF-8.
876 return false unless UTF8.valid? k
877 return false unless UTF8.valid? v
883 # strip characters which are invalid in XML documents from the strings
884 # in the +tags+ hash.
885 def strip_non_xml_chars(tags)
889 new_k = k.delete "\000-\037", "^\011\012\015"
890 new_v = v.delete "\000-\037", "^\011\012\015"
891 new_tags[new_k] = new_v
897 # ====================================================================
898 # Alternative SQL queries for getway/whichways
900 def sql_find_ways_in_area(bbox)
902 SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version
903 FROM current_way_nodes
904 INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
905 INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
906 WHERE current_nodes.visible=TRUE
907 AND current_ways.visible=TRUE
908 AND #{OSM.sql_for_area(bbox, "current_nodes.")}
910 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
913 def sql_find_pois_in_area(bbox)
916 SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version
918 LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
919 WHERE current_nodes.visible=TRUE
921 AND #{OSM.sql_for_area(bbox, "current_nodes.")}
923 ActiveRecord::Base.connection.select_all(sql).each do |row|
925 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
926 poitags[n['k']]=n['v']
928 pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i]
933 def sql_find_relations_in_area_and_ways(bbox,way_ids)
934 # ** It would be more Potlatchy to get relations for nodes within ways
935 # during 'getway', not here
937 SELECT DISTINCT cr.id AS relid,cr.version AS version
938 FROM current_relations cr
939 INNER JOIN current_relation_members crm ON crm.id=cr.id
940 INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='Node'
941 WHERE #{OSM.sql_for_area(bbox, "cn.")}
943 unless way_ids.empty?
946 SELECT DISTINCT cr.id AS relid,cr.version AS version
947 FROM current_relations cr
948 INNER JOIN current_relation_members crm ON crm.id=cr.id
949 WHERE crm.member_type='Way'
950 AND crm.member_id IN (#{way_ids.join(',')})
953 ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
956 def sql_get_nodes_in_way(wayid)
959 SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version
960 FROM current_way_nodes,current_nodes
961 WHERE current_way_nodes.id=#{wayid.to_i}
962 AND current_way_nodes.node_id=current_nodes.id
963 AND current_nodes.visible=TRUE
966 ActiveRecord::Base.connection.select_all(sql).each do |row|
968 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
969 nodetags[n['k']]=n['v']
971 nodetags.delete('created_by')
972 points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags,row['version'].to_i]
977 def sql_get_tags_in_way(wayid)
979 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
980 tags[row['k']]=row['v']
985 def sql_get_way_version(wayid)
986 ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")['version']
989 def sql_get_way_user(wayid)
990 ActiveRecord::Base.connection.select_one("SELECT user FROM current_ways,changesets WHERE current_ways.id=#{wayid.to_i} AND current_ways.changeset=changesets.id")['user']