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
43 # Help methods for checking boundary sanity and area size
46 before_filter :check_api_writable
48 # Main AMF handlers: process the raw AMF string (using AMF library) and
49 # calls each action (private method) accordingly.
50 # ** FIXME: refactor to reduce duplication of code across read/write
54 req=StringIO.new(request.raw_post+0.chr)# Get POST data as request
55 # (cf http://www.ruby-forum.com/topic/122163)
56 req.read(2) # Skip version indicator and client ID
60 headers=AMF.getint(req) # Read number of headers
61 headers.times do # Read each header
62 name=AMF.getstring(req) # |
63 req.getc # | skip boolean
64 value=AMF.getvalue(req) # |
65 header["name"]=value # |
68 bodies=AMF.getint(req) # Read number of bodies
69 render :content_type => "application/x-amf", :text => proc { |response, output|
70 a,b=bodies.divmod(256)
71 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
72 bodies.times do # Read each body
73 message=AMF.getstring(req) # | get message name
74 index=AMF.getstring(req) # | get index in response sequence
75 bytes=AMF.getlong(req) # | get total size in bytes
76 args=AMF.getvalue(req) # | get response (probably an array)
78 logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
81 when 'getpresets'; result=AMF.putdata(index,getpresets(*args))
82 when 'whichways'; result=AMF.putdata(index,whichways(*args))
83 when 'whichways_deleted'; result=AMF.putdata(index,whichways_deleted(*args))
84 when 'getway'; result=AMF.putdata(index,getway(args[0].to_i))
85 when 'getrelation'; result=AMF.putdata(index,getrelation(args[0].to_i))
86 when 'getway_old'; result=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
87 when 'getway_history'; result=AMF.putdata(index,getway_history(args[0].to_i))
88 when 'getnode_history'; result=AMF.putdata(index,getnode_history(args[0].to_i))
89 when 'findgpx'; result=AMF.putdata(index,findgpx(*args))
90 when 'findrelations'; result=AMF.putdata(index,findrelations(*args))
91 when 'getpoi'; result=AMF.putdata(index,getpoi(*args))
97 render :nothing => true, :status => :method_not_allowed
103 req=StringIO.new(request.raw_post+0.chr)
105 renumberednodes={} # Shared across repeated putways
106 renumberedways={} # Shared across repeated putways
108 headers=AMF.getint(req) # Read number of headers
109 headers.times do # Read each header
110 name=AMF.getstring(req) # |
111 req.getc # | skip boolean
112 value=AMF.getvalue(req) # |
113 header["name"]=value # |
116 bodies=AMF.getint(req) # Read number of bodies
117 render :content_type => "application/x-amf", :text => proc { |response, output|
118 a,b=bodies.divmod(256)
119 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
120 bodies.times do # Read each body
121 message=AMF.getstring(req) # | get message name
122 index=AMF.getstring(req) # | get index in response sequence
123 bytes=AMF.getlong(req) # | get total size in bytes
124 args=AMF.getvalue(req) # | get response (probably an array)
125 err=false # Abort batch on error
127 logger.info("Executing AMF #{message}:#{index}")
133 when 'putway'; orn=renumberednodes.dup
134 r=putway(renumberednodes,*args)
135 r[4]=renumberednodes.reject { |k,v| orn.has_key?(k) }
136 if r[0]==0 and r[2] != r[3] then renumberedways[r[2]] = r[3] end
137 result=AMF.putdata(index,r)
138 when 'putrelation'; result=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
139 when 'deleteway'; result=AMF.putdata(index,deleteway(*args))
140 when 'putpoi'; r=putpoi(*args)
141 if r[0]==0 and r[2] != r[3] then renumberednodes[r[2]] = r[3] end
142 result=AMF.putdata(index,r)
143 when 'startchangeset'; result=AMF.putdata(index,startchangeset(*args))
145 if result[0]==-3 then err=true end # If a conflict is detected, don't execute any more writes
151 render :nothing => true, :status => :method_not_allowed
157 def amf_handle_error(call,rootobj,rootid)
159 rescue OSM::APIAlreadyDeletedError => ex
160 return [-4, ex.object, ex.object_id]
161 rescue OSM::APIVersionMismatchError => ex
162 return [-3, [rootobj, rootid], [ex.type.downcase, ex.id, ex.latest]]
163 rescue OSM::APIUserChangesetMismatchError => ex
165 rescue OSM::APIBadBoundingBox => ex
166 return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"]
167 rescue OSM::APIError => ex
169 rescue Exception => ex
170 return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"]
173 def amf_handle_error_with_timeout(call,rootobj,rootid)
174 amf_handle_error(call,rootobj,rootid) do
175 Timeout::timeout(APP_CONFIG['api_timeout'], OSM::APITimeoutError) do
181 # Start new changeset
182 # Returns success_code,success_message,changeset id
184 def startchangeset(usertoken, cstags, closeid, closecomment, opennew)
185 amf_handle_error("'startchangeset'",nil,nil) do
186 user = getuser(usertoken)
187 if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
188 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
190 # close previous changeset and add comment
192 cs = Changeset.find(closeid.to_i)
193 cs.set_closed_time_now
194 if cs.user_id!=user.id
195 raise OSM::APIUserChangesetMismatchError.new
196 elsif closecomment.empty?
199 cs.tags['comment']=closecomment
204 # open a new changeset
209 if !closecomment.empty? then cs.tags['comment']=closecomment end
210 # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
211 cs.created_at = Time.now.getutc
212 cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
221 # Return presets (default tags, localisation etc.):
222 # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
224 def getpresets(usertoken,lang) #:doc:
225 user = getuser(usertoken)
227 if user && !user.languages.empty?
228 request.user_preferred_languages = user.languages
231 lang = request.compatible_language_from(getlocales)
232 (real_lang, localised) = getlocalized(lang)
234 # Tell Potlatch what language it's using
235 localised["__potlatch_locale"] = real_lang
237 # Get help from i18n but delete it so we won't pass it around
239 help = localised["help_html"]
240 localised.delete("help_html")
242 # Populate icon names
243 POTLATCH_PRESETS[10].each { |id|
244 POTLATCH_PRESETS[11][id] = localised["preset_icon_#{id}"]
245 localised.delete("preset_icon_#{id}")
248 return POTLATCH_PRESETS+[localised,help]
251 def getlocalized(lang)
252 # What we end up actually using. Reported in Potlatch's created_by=* string
255 # Load English defaults
256 en = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/locales/en.yml"))["en"]
259 return [loaded_lang, en]
261 # Use English as a fallback
263 other = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/locales/#{lang}.yml"))[lang]
269 # We have to return a flat list and some of the keys won't be
270 # translated (probably)
271 return [loaded_lang, en.merge(other)]
276 # Find all the ways, POI nodes (i.e. not part of ways), and relations
277 # in a given bounding box. Nodes are returned in full; ways and relations
280 # return is of the form:
281 # [success_code, success_message,
282 # [[way_id, way_version], ...],
283 # [[node_id, lat, lon, [tags, ...], node_version], ...],
284 # [[rel_id, rel_version], ...]]
285 # where the ways are any visible ways which refer to any visible
286 # nodes in the bbox, nodes are any visible nodes in the bbox but not
287 # used in any way, rel is any relation which refers to either a way
288 # or node that we're returning.
289 def whichways(xmin, ymin, xmax, ymax) #:doc:
290 amf_handle_error_with_timeout("'whichways'",nil,nil) do
291 enlarge = [(xmax-xmin)/8,0.01].min
292 xmin -= enlarge; ymin -= enlarge
293 xmax += enlarge; ymax += enlarge
295 # check boundary is sane and area within defined
296 # see /config/application.yml
297 check_boundaries(xmin, ymin, xmax, ymax)
299 if POTLATCH_USE_SQL then
300 ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
301 points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
302 relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
304 # find the way ids in an area
305 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
306 ways = nodes_in_area.inject([]) { |sum, node|
307 visible_ways = node.ways.select { |w| w.visible? }
308 sum + visible_ways.collect { |w| [w.id,w.version] }
312 # find the node ids in an area that aren't part of ways
313 nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
314 points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
316 # find the relations used by those nodes and ways
317 relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
318 Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
319 relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
322 [0, '', ways, points, relations]
326 # Find deleted ways in current bounding box (similar to whichways, but ways
327 # with a deleted node only - not POIs or relations).
329 def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
330 amf_handle_error_with_timeout("'whichways_deleted'",nil,nil) do
331 enlarge = [(xmax-xmin)/8,0.01].min
332 xmin -= enlarge; ymin -= enlarge
333 xmax += enlarge; ymax += enlarge
335 # check boundary is sane and area within defined
336 # see /config/application.yml
337 check_boundaries(xmin, ymin, xmax, ymax)
339 nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
340 way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
346 # Get a way including nodes and tags.
347 # Returns the way id, a Potlatch-style array of points, a hash of tags, the version number, and the user ID.
349 def getway(wayid) #:doc:
350 amf_handle_error_with_timeout("'getway' #{wayid}" ,'way',wayid) do
351 if POTLATCH_USE_SQL then
352 points = sql_get_nodes_in_way(wayid)
353 tags = sql_get_tags_in_way(wayid)
354 version = sql_get_way_version(wayid)
355 uid = sql_get_way_user(wayid)
357 # Ideally we would do ":include => :nodes" here but if we do that
358 # then rails only seems to return the first copy of a node when a
359 # way includes a node more than once
360 way = Way.find(:first, :conditions => { :id => wayid }, :include => { :nodes => :node_tags })
362 # check case where way has been deleted or doesn't exist
363 return [-4, 'way', wayid] if way.nil? or !way.visible
365 points = way.nodes.collect do |node|
367 nodetags.delete('created_by')
368 [node.lon, node.lat, node.id, nodetags, node.version]
371 version = way.version
372 uid = way.changeset.user.id
375 [0, '', wayid, points, tags, version, uid]
379 # Get an old version of a way, and all constituent nodes.
381 # For undelete (version<0), always uses the most recent version of each node,
382 # even if it's moved. For revert (version >= 0), uses the node in existence
383 # at the time, generating a new id if it's still visible and has been moved/
389 # 2. array of points,
392 # 5. is this the current, visible version? (boolean)
394 def getway_old(id, timestamp) #:doc:
395 amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}", 'way',id) do
398 old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
399 points = old_way.get_nodes_undelete unless old_way.nil?
403 timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
404 old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
406 points = old_way.get_nodes_revert(timestamp)
408 return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id]
412 # thrown by date parsing method. leave old_way as nil for
413 # the error handler below.
418 return [-1, "Sorry, the server could not find a way at that time.", id]
421 old_way.tags['history'] = "Retrieved from v#{old_way.version}"
422 return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
427 # Find history of a way.
428 # Returns 'way', id, and an array of previous versions:
429 # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
430 # - now [timestamp,user,uid]
432 # Heuristic: Find all nodes that have ever been part of the way;
433 # get a list of their revision dates; add revision dates of the way;
434 # sort and collapse list (to within 2 seconds); trim all dates before the
435 # start date of the way.
437 def getway_history(wayid) #:doc:
439 # Find list of revision dates for way and all constituent nodes
442 Way.find(wayid).old_ways.collect do |a|
443 revdates.push(a.timestamp)
444 unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
446 Node.find(n).old_nodes.collect do |o|
447 revdates.push(o.timestamp)
448 unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
452 waycreated=revdates[0]
457 # Remove any dates (from nodes) before first revision date of way
458 revdates.delete_if { |d| d<waycreated }
459 # Remove any elements where 2 seconds doesn't elapse before next one
460 revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
461 # Collect all in one nested array
462 revdates.collect! {|d| [d.succ.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
465 return ['way', wayid, revdates]
466 rescue ActiveRecord::RecordNotFound
467 return ['way', wayid, []]
471 # Find history of a node. Returns 'node', id, and an array of previous versions as above.
473 def getnode_history(nodeid) #:doc:
475 history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
476 [old_node.timestamp.succ.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
478 return ['node', nodeid, history]
479 rescue ActiveRecord::RecordNotFound
480 return ['node', nodeid, []]
485 user_object = obj.changeset.user
486 user = user_object.data_public? ? user_object.display_name : 'anonymous'
487 uid = user_object.data_public? ? user_object.id : 0
491 # Find GPS traces with specified name/id.
492 # Returns array listing GPXs, each one comprising id, name and description.
494 def findgpx(searchterm, usertoken)
495 amf_handle_error_with_timeout("'findgpx'" ,nil,nil) do
496 user = getuser(usertoken)
497 if !user then return -1,"You must be logged in to search for GPX traces." end
498 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
501 if searchterm.to_i>0 then
502 gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
504 gpxs.push([gpx.id, gpx.name, gpx.description])
507 Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
508 gpxs.push([gpx.id, gpx.name, gpx.description])
515 # Get a relation with all tags and members.
521 # 4. list of members,
524 def getrelation(relid) #:doc:
525 amf_handle_error("'getrelation' #{relid}" ,'relation',relid) do
526 rel = Relation.find(:first, :conditions => { :id => relid })
528 return [-4, 'relation', relid] if rel.nil? or !rel.visible
529 [0, '', relid, rel.tags, rel.members, rel.version]
533 # Find relations with specified name/id.
534 # Returns array of relations, each in same form as getrelation.
536 def findrelations(searchterm)
538 if searchterm.to_i>0 then
539 rel = Relation.find(searchterm.to_i)
540 if rel and rel.visible then
541 rels.push([rel.id, rel.tags, rel.members, rel.version])
544 RelationTag.find(:all, :limit => 11, :conditions => ["v like ?", "%#{searchterm}%"] ).each do |t|
545 if t.relation.visible then
546 rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
556 # 1. original relation id (unchanged),
557 # 2. new relation id,
560 def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
561 amf_handle_error("'putrelation' #{relid}" ,'relation',relid) do
562 user = getuser(usertoken)
563 if !user then return -1,"You are not logged in, so the relation could not be saved." end
564 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
565 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
566 tags = strip_non_xml_chars tags
569 visible = (visible.to_i != 0)
573 Relation.transaction do
574 # create a new relation, or find the existing one
576 relation = Relation.find(relid)
578 # We always need a new node, based on the data that has been sent to us
579 new_relation = Relation.new
581 # check the members are all positive, and correctly type
586 mid = renumberednodes[mid] if m[0] == 'Node'
587 mid = renumberedways[mid] if m[0] == 'Way'
590 typedmembers << [m[0], mid, m[2]]
594 # assign new contents
595 new_relation.members = typedmembers
596 new_relation.tags = tags
597 new_relation.visible = visible
598 new_relation.changeset_id = changeset_id
599 new_relation.version = version
602 # We're creating the relation
603 new_relation.create_with_history(user)
605 # We're updating the relation
606 new_relation.id = relid
607 relation.update_from(new_relation, user)
609 # We're deleting the relation
610 new_relation.id = relid
611 relation.delete_with_history!(new_relation, user)
616 return [0, '', relid, new_relation.id, new_relation.version]
618 return [0, '', relid, relid, relation.version]
623 # Save a way to the database, including all nodes. Any nodes in the previous
624 # version and no longer used are deleted.
627 # 0. hash of renumbered nodes (added by amf_controller)
628 # 1. current user token (for authentication)
629 # 2. current changeset
632 # 5. list of nodes in way
633 # 6. hash of way tags
634 # 7. array of nodes to change (each one is [lon,lat,id,version,tags]),
635 # 8. hash of nodes to delete (id->version).
638 # 0. '0' (code for success),
640 # 2. original way id (unchanged),
642 # 4. hash of renumbered nodes (old id=>new id),
644 # 6. hash of node versions (node=>version)
646 def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc:
647 amf_handle_error("'putway' #{originalway}" ,'way',originalway) do
650 user = getuser(usertoken)
651 if !user then return -1,"You are not logged in, so the way could not be saved." end
652 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
653 if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
654 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
655 attributes = strip_non_xml_chars attributes
657 originalway = originalway.to_i
658 pointlist.collect! {|a| a.to_i }
660 way=nil # this is returned, so scope it outside the transaction
664 # -- Update each changed node
672 if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end
673 if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
674 if renumberednodes[id] then id = renumberednodes[id] end
677 node.changeset_id = changeset_id
682 # fixup node tags in a way as well
683 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
684 node.tags = strip_non_xml_chars node.tags
686 node.tags.delete('created_by')
687 node.version = version
689 # We're creating the node
690 node.create_with_history(user)
691 renumberednodes[id] = node.id
692 nodeversions[node.id] = node.version
694 # We're updating an existing node
695 previous=Node.find(id)
697 previous.update_from(node, user)
698 nodeversions[previous.id] = previous.version
702 # -- Save revised way
704 pointlist.collect! {|a|
705 renumberednodes[a] ? renumberednodes[a]:a
708 new_way.tags = attributes
709 new_way.nds = pointlist
710 new_way.changeset_id = changeset_id
711 new_way.version = wayversion
713 new_way.create_with_history(user)
714 way=new_way # so we can get way.id and way.version
716 way = Way.find(originalway)
717 if way.tags!=attributes or way.nds!=pointlist or !way.visible?
718 new_way.id=originalway
719 way.update_from(new_way, user)
723 # -- Delete unwanted nodes
725 deletednodes.each do |id,v|
726 node = Node.find(id.to_i)
728 new_node.changeset_id = changeset_id
729 new_node.version = v.to_i
730 new_node.id = id.to_i
732 node.delete_with_history!(new_node, user)
733 rescue OSM::APIPreconditionFailedError => ex
734 # We don't do anything here as the node is being used elsewhere
735 # and we don't want to delete it
741 [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
745 # Save POI to the database.
746 # Refuses save if the node has since become part of a way.
747 # Returns array with:
749 # 1. success message,
750 # 2. original node id (unchanged),
754 def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
755 amf_handle_error("'putpoi' #{id}", 'node',id) do
756 user = getuser(usertoken)
757 if !user then return -1,"You are not logged in, so the point could not be saved." end
758 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
759 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
760 tags = strip_non_xml_chars tags
763 visible = (visible.to_i == 1)
771 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
774 # We always need a new node, based on the data that has been sent to us
777 new_node.changeset_id = changeset_id
778 new_node.version = version
783 # We're creating the node
784 new_node.create_with_history(user)
786 # We're updating the node
788 node.update_from(new_node, user)
790 # We're deleting the node
792 node.delete_with_history!(new_node, user)
798 return [0, '', id, new_node.id, new_node.version]
800 return [0, '', id, node.id, node.version]
805 # Read POI from database
806 # (only called on revert: POIs are usually read by whichways).
808 # Returns array of id, long, lat, hash of tags, (current) version.
810 def getpoi(id,timestamp) #:doc:
811 amf_handle_error("'getpoi' #{id}" ,'node',id) do
815 unless timestamp == ''
816 n = OldNode.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
820 return [0, '', n.id, n.lon, n.lat, n.tags, v]
822 return [-4, 'node', id]
827 # Delete way and all constituent nodes.
831 # * the id of the way to change
832 # * the version of the way that was downloaded
833 # * a hash of the id and versions of all the nodes that are in the way, if any
834 # of the nodes have been changed by someone else then, there is a problem!
835 # Returns 0 (success), unchanged way id, new way version, new node versions.
837 def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:
838 amf_handle_error("'deleteway' #{way_id}" ,'way', way_id) do
839 user = getuser(usertoken)
840 unless user then return -1,"You are not logged in, so the way could not be deleted." end
841 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
845 old_way=nil # returned, so scope it outside the transaction
846 # Need a transaction so that if one item fails to delete, the whole delete fails.
851 old_way = Way.find(way_id)
853 delete_way.version = way_version
854 delete_way.changeset_id = changeset_id
855 delete_way.id = way_id
856 old_way.delete_with_history!(delete_way, user)
858 # -- Delete unwanted nodes
860 deletednodes.each do |id,v|
861 node = Node.find(id.to_i)
863 new_node.changeset_id = changeset_id
864 new_node.version = v.to_i
865 new_node.id = id.to_i
867 node.delete_with_history!(new_node, user)
868 nodeversions[node.id]=node.version
869 rescue OSM::APIPreconditionFailedError => ex
870 # We don't do anything with the exception as the node is in use
871 # elsewhere and we don't want to delete it
876 [0, '', way_id, old_way.version, nodeversions]
881 # ====================================================================
885 # (can also be of form user:pass)
886 # When we are writing to the api, we need the actual user model,
887 # not just the id, hence this abstraction
889 def getuser(token) #:doc:
890 if (token =~ /^(.+)\:(.+)$/) then
891 user = User.authenticate(:username => $1, :password => $2)
893 user = User.authenticate(:token => token)
899 Dir.glob("#{RAILS_ROOT}/config/potlatch/locales/*").collect { |f| File.basename(f, ".yml") }
903 # check that all key-value pairs are valid UTF-8.
906 return false unless UTF8.valid? k
907 return false unless UTF8.valid? v
913 # strip characters which are invalid in XML documents from the strings
914 # in the +tags+ hash.
915 def strip_non_xml_chars(tags)
919 new_k = k.delete "\000-\037", "^\011\012\015"
920 new_v = v.delete "\000-\037", "^\011\012\015"
921 new_tags[new_k] = new_v
927 # ====================================================================
928 # Alternative SQL queries for getway/whichways
930 def sql_find_ways_in_area(xmin,ymin,xmax,ymax)
932 SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version
933 FROM current_way_nodes
934 INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
935 INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
936 WHERE current_nodes.visible=TRUE
937 AND current_ways.visible=TRUE
938 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
940 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
943 def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
946 SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version
948 LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
949 WHERE current_nodes.visible=TRUE
951 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
953 ActiveRecord::Base.connection.select_all(sql).each do |row|
955 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
956 poitags[n['k']]=n['v']
958 pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i]
963 def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
964 # ** It would be more Potlatchy to get relations for nodes within ways
965 # during 'getway', not here
967 SELECT DISTINCT cr.id AS relid,cr.version AS version
968 FROM current_relations cr
969 INNER JOIN current_relation_members crm ON crm.id=cr.id
970 INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='Node'
971 WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
973 unless way_ids.empty?
976 SELECT DISTINCT cr.id AS relid,cr.version AS version
977 FROM current_relations cr
978 INNER JOIN current_relation_members crm ON crm.id=cr.id
979 WHERE crm.member_type='Way'
980 AND crm.member_id IN (#{way_ids.join(',')})
983 ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
986 def sql_get_nodes_in_way(wayid)
989 SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version
990 FROM current_way_nodes,current_nodes
991 WHERE current_way_nodes.id=#{wayid.to_i}
992 AND current_way_nodes.node_id=current_nodes.id
993 AND current_nodes.visible=TRUE
996 ActiveRecord::Base.connection.select_all(sql).each do |row|
998 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
999 nodetags[n['k']]=n['v']
1001 nodetags.delete('created_by')
1002 points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags,row['version'].to_i]
1007 def sql_get_tags_in_way(wayid)
1009 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
1010 tags[row['k']]=row['v']
1015 def sql_get_way_version(wayid)
1016 ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")['version']
1019 def sql_get_way_user(wayid)
1020 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']