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
71 self.content_type = Mime::AMF
72 self.response_body = proc { |response, output|
73 a,b=bodies.divmod(256)
74 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
75 bodies.times do # Read each body
76 message=AMF.getstring(req) # | get message name
77 index=AMF.getstring(req) # | get index in response sequence
78 bytes=AMF.getlong(req) # | get total size in bytes
79 args=AMF.getvalue(req) # | get response (probably an array)
81 logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
84 when 'getpresets'; result=AMF.putdata(index,getpresets(*args))
85 when 'whichways'; result=AMF.putdata(index,whichways(*args))
86 when 'whichways_deleted'; result=AMF.putdata(index,whichways_deleted(*args))
87 when 'getway'; result=AMF.putdata(index,getway(args[0].to_i))
88 when 'getrelation'; result=AMF.putdata(index,getrelation(args[0].to_i))
89 when 'getway_old'; result=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
90 when 'getway_history'; result=AMF.putdata(index,getway_history(args[0].to_i))
91 when 'getnode_history'; result=AMF.putdata(index,getnode_history(args[0].to_i))
92 when 'findgpx'; result=AMF.putdata(index,findgpx(*args))
93 when 'findrelations'; result=AMF.putdata(index,findrelations(*args))
94 when 'getpoi'; result=AMF.putdata(index,getpoi(*args))
100 render :nothing => true, :status => :method_not_allowed
106 req=StringIO.new(request.raw_post+0.chr)
108 renumberednodes={} # Shared across repeated putways
109 renumberedways={} # Shared across repeated putways
111 headers=AMF.getint(req) # Read number of headers
112 headers.times do # Read each header
113 name=AMF.getstring(req) # |
114 req.getc # | skip boolean
115 value=AMF.getvalue(req) # |
116 header["name"]=value # |
119 bodies=AMF.getint(req) # Read number of bodies
122 self.content_type = Mime::AMF
123 self.response_body = proc { |response, output|
124 a,b=bodies.divmod(256)
125 output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
126 bodies.times do # Read each body
127 message=AMF.getstring(req) # | get message name
128 index=AMF.getstring(req) # | get index in response sequence
129 bytes=AMF.getlong(req) # | get total size in bytes
130 args=AMF.getvalue(req) # | get response (probably an array)
131 err=false # Abort batch on error
133 logger.info("Executing AMF #{message}:#{index}")
139 when 'putway'; orn=renumberednodes.dup
140 r=putway(renumberednodes,*args)
141 r[4]=renumberednodes.reject { |k,v| orn.has_key?(k) }
142 if r[0]==0 and r[2] != r[3] then renumberedways[r[2]] = r[3] end
143 result=AMF.putdata(index,r)
144 when 'putrelation'; result=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
145 when 'deleteway'; result=AMF.putdata(index,deleteway(*args))
146 when 'putpoi'; r=putpoi(*args)
147 if r[0]==0 and r[2] != r[3] then renumberednodes[r[2]] = r[3] end
148 result=AMF.putdata(index,r)
149 when 'startchangeset'; result=AMF.putdata(index,startchangeset(*args))
151 if result[0]==-3 then err=true end # If a conflict is detected, don't execute any more writes
157 render :nothing => true, :status => :method_not_allowed
163 def amf_handle_error(call,rootobj,rootid)
165 rescue OSM::APIAlreadyDeletedError => ex
166 return [-4, ex.object, ex.object_id]
167 rescue OSM::APIVersionMismatchError => ex
168 return [-3, [rootobj, rootid], [ex.type.downcase, ex.id, ex.latest]]
169 rescue OSM::APIUserChangesetMismatchError => ex
171 rescue OSM::APIBadBoundingBox => ex
172 return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"]
173 rescue OSM::APIError => ex
175 rescue Exception => ex
176 return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"]
179 def amf_handle_error_with_timeout(call,rootobj,rootid)
180 amf_handle_error(call,rootobj,rootid) do
181 Timeout::timeout(API_TIMEOUT, OSM::APITimeoutError) do
187 # Start new changeset
188 # Returns success_code,success_message,changeset id
190 def startchangeset(usertoken, cstags, closeid, closecomment, opennew)
191 amf_handle_error("'startchangeset'",nil,nil) do
192 user = getuser(usertoken)
193 if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
194 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
195 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
198 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
199 cstags = strip_non_xml_chars cstags
202 # close previous changeset and add comment
204 cs = Changeset.find(closeid.to_i)
205 cs.set_closed_time_now
206 if cs.user_id!=user.id
207 raise OSM::APIUserChangesetMismatchError.new
208 elsif closecomment.empty?
211 cs.tags['comment']=closecomment
212 # in case closecomment has chars not allowed in xml
213 cs.tags = strip_non_xml_chars cs.tags
218 # open a new changeset
223 if !closecomment.empty?
224 cs.tags['comment']=closecomment
225 # in case closecomment has chars not allowed in xml
226 cs.tags = strip_non_xml_chars cs.tags
228 # smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
229 cs.created_at = Time.now.getutc
230 cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
239 # Return presets (default tags, localisation etc.):
240 # uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
242 def getpresets(usertoken,lang) #:doc:
243 user = getuser(usertoken)
245 if user && !user.languages.empty?
246 request.user_preferred_languages = user.languages
249 lang = request.compatible_language_from(getlocales)
250 (real_lang, localised) = getlocalized(lang)
252 # Tell Potlatch what language it's using
253 localised["__potlatch_locale"] = real_lang
255 # Get help from i18n but delete it so we won't pass it around
257 help = localised["help_html"]
258 localised.delete("help_html")
260 # Populate icon names
261 POTLATCH_PRESETS[10].each { |id|
262 POTLATCH_PRESETS[11][id] = localised["preset_icon_#{id}"]
263 localised.delete("preset_icon_#{id}")
266 return POTLATCH_PRESETS+[localised,help]
269 def getlocalized(lang)
270 # What we end up actually using. Reported in Potlatch's created_by=* string
273 # Load English defaults
274 en = YAML::load(File.open("#{Rails.root}/config/potlatch/locales/en.yml"))["en"]
277 return [loaded_lang, en]
279 # Use English as a fallback
281 other = YAML::load(File.open("#{Rails.root}/config/potlatch/locales/#{lang}.yml"))[lang]
287 # We have to return a flat list and some of the keys won't be
288 # translated (probably)
289 return [loaded_lang, en.merge(other)]
294 # Find all the ways, POI nodes (i.e. not part of ways), and relations
295 # in a given bounding box. Nodes are returned in full; ways and relations
298 # return is of the form:
299 # [success_code, success_message,
300 # [[way_id, way_version], ...],
301 # [[node_id, lat, lon, [tags, ...], node_version], ...],
302 # [[rel_id, rel_version], ...]]
303 # where the ways are any visible ways which refer to any visible
304 # nodes in the bbox, nodes are any visible nodes in the bbox but not
305 # used in any way, rel is any relation which refers to either a way
306 # or node that we're returning.
307 def whichways(xmin, ymin, xmax, ymax) #:doc:
308 amf_handle_error_with_timeout("'whichways'",nil,nil) do
309 enlarge = [(xmax-xmin)/8,0.01].min
310 xmin -= enlarge; ymin -= enlarge
311 xmax += enlarge; ymax += enlarge
313 # check boundary is sane and area within defined
314 # see /config/application.yml
315 check_boundaries(xmin, ymin, xmax, ymax)
317 if POTLATCH_USE_SQL then
318 ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
319 points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
320 relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
322 # find the way ids in an area
323 nodes_in_area = Node.bbox(ymin, xmin, ymax, xmax).visible.includes(:ways)
324 ways = nodes_in_area.inject([]) { |sum, node|
325 visible_ways = node.ways.select { |w| w.visible? }
326 sum + visible_ways.collect { |w| [w.id,w.version] }
330 # find the node ids in an area that aren't part of ways
331 nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
332 points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
334 # find the relations used by those nodes and ways
335 relations = Relation.nodes(nodes_in_area.collect { |n| n.id }).visible +
336 Relation.ways(ways.collect { |w| w[0] }).visible
337 relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
340 [0, '', ways, points, relations]
344 # Find deleted ways in current bounding box (similar to whichways, but ways
345 # with a deleted node only - not POIs or relations).
347 def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
348 amf_handle_error_with_timeout("'whichways_deleted'",nil,nil) do
349 enlarge = [(xmax-xmin)/8,0.01].min
350 xmin -= enlarge; ymin -= enlarge
351 xmax += enlarge; ymax += enlarge
353 # check boundary is sane and area within defined
354 # see /config/application.yml
355 check_boundaries(xmin, ymin, xmax, ymax)
357 nodes_in_area = Node.bbox(ymin, xmin, ymax, xmax).joins(:ways_via_history).where(:current_ways => { :visible => false })
358 way_ids = nodes_in_area.collect { |node| node.ways_via_history.invisible.collect { |way| way.id } }.flatten.uniq
364 # Get a way including nodes and tags.
365 # Returns the way id, a Potlatch-style array of points, a hash of tags, the version number, and the user ID.
367 def getway(wayid) #:doc:
368 amf_handle_error_with_timeout("'getway' #{wayid}" ,'way',wayid) do
369 if POTLATCH_USE_SQL then
370 points = sql_get_nodes_in_way(wayid)
371 tags = sql_get_tags_in_way(wayid)
372 version = sql_get_way_version(wayid)
373 uid = sql_get_way_user(wayid)
375 # Ideally we would do ":include => :nodes" here but if we do that
376 # then rails only seems to return the first copy of a node when a
377 # way includes a node more than once
378 way = Way.find(:first, :conditions => { :id => wayid }, :include => { :nodes => :node_tags })
380 # check case where way has been deleted or doesn't exist
381 return [-4, 'way', wayid] if way.nil? or !way.visible
383 points = way.nodes.collect do |node|
385 nodetags.delete('created_by')
386 [node.lon, node.lat, node.id, nodetags, node.version]
389 version = way.version
390 uid = way.changeset.user.id
393 [0, '', wayid, points, tags, version, uid]
397 # Get an old version of a way, and all constituent nodes.
399 # For undelete (version<0), always uses the most recent version of each node,
400 # even if it's moved. For revert (version >= 0), uses the node in existence
401 # at the time, generating a new id if it's still visible and has been moved/
407 # 2. array of points,
410 # 5. is this the current, visible version? (boolean)
412 def getway_old(id, timestamp) #:doc:
413 amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}", 'way',id) do
416 old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
417 points = old_way.get_nodes_undelete unless old_way.nil?
421 timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
422 old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
424 points = old_way.get_nodes_revert(timestamp)
426 return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id]
430 # thrown by date parsing method. leave old_way as nil for
431 # the error handler below.
436 return [-1, "Sorry, the server could not find a way at that time.", id]
439 old_way.tags['history'] = "Retrieved from v#{old_way.version}"
440 return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
445 # Find history of a way.
446 # Returns 'way', id, and an array of previous versions:
447 # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid]
448 # - now [timestamp,user,uid]
450 # Heuristic: Find all nodes that have ever been part of the way;
451 # get a list of their revision dates; add revision dates of the way;
452 # sort and collapse list (to within 2 seconds); trim all dates before the
453 # start date of the way.
455 def getway_history(wayid) #:doc:
457 # Find list of revision dates for way and all constituent nodes
460 Way.find(wayid).old_ways.collect do |a|
461 revdates.push(a.timestamp)
462 unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end
464 Node.find(n).old_nodes.collect do |o|
465 revdates.push(o.timestamp)
466 unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end
470 waycreated=revdates[0]
475 # Remove any dates (from nodes) before first revision date of way
476 revdates.delete_if { |d| d<waycreated }
477 # Remove any elements where 2 seconds doesn't elapse before next one
478 revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
479 # Collect all in one nested array
480 revdates.collect! {|d| [d.succ.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
483 return ['way', wayid, revdates]
484 rescue ActiveRecord::RecordNotFound
485 return ['way', wayid, []]
489 # Find history of a node. Returns 'node', id, and an array of previous versions as above.
491 def getnode_history(nodeid) #:doc:
493 history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
494 [old_node.timestamp.succ.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
496 return ['node', nodeid, history]
497 rescue ActiveRecord::RecordNotFound
498 return ['node', nodeid, []]
503 user_object = obj.changeset.user
504 user = user_object.data_public? ? user_object.display_name : 'anonymous'
505 uid = user_object.data_public? ? user_object.id : 0
509 # Find GPS traces with specified name/id.
510 # Returns array listing GPXs, each one comprising id, name and description.
512 def findgpx(searchterm, usertoken)
513 amf_handle_error_with_timeout("'findgpx'" ,nil,nil) do
514 user = getuser(usertoken)
515 if !user then return -1,"You must be logged in to search for GPX traces." end
516 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
519 if searchterm.to_i>0 then
520 gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] )
522 gpxs.push([gpx.id, gpx.name, gpx.description])
525 Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx|
526 gpxs.push([gpx.id, gpx.name, gpx.description])
533 # Get a relation with all tags and members.
539 # 4. list of members,
542 def getrelation(relid) #:doc:
543 amf_handle_error("'getrelation' #{relid}" ,'relation',relid) do
544 rel = Relation.find(:first, :conditions => { :id => relid })
546 return [-4, 'relation', relid] if rel.nil? or !rel.visible
547 [0, '', relid, rel.tags, rel.members, rel.version]
551 # Find relations with specified name/id.
552 # Returns array of relations, each in same form as getrelation.
554 def findrelations(searchterm)
556 if searchterm.to_i>0 then
557 rel = Relation.find(searchterm.to_i)
558 if rel and rel.visible then
559 rels.push([rel.id, rel.tags, rel.members, rel.version])
562 RelationTag.find(:all, :limit => 11, :conditions => ["v like ?", "%#{searchterm}%"] ).each do |t|
563 if t.relation.visible then
564 rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
574 # 1. original relation id (unchanged),
575 # 2. new relation id,
578 def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
579 amf_handle_error("'putrelation' #{relid}" ,'relation',relid) do
580 user = getuser(usertoken)
581 if !user then return -1,"You are not logged in, so the relation could not be saved." end
582 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
583 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
585 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
586 tags = strip_non_xml_chars tags
589 visible = (visible.to_i != 0)
593 Relation.transaction do
594 # create a new relation, or find the existing one
596 relation = Relation.find(relid)
598 # We always need a new node, based on the data that has been sent to us
599 new_relation = Relation.new
601 # check the members are all positive, and correctly type
606 mid = renumberednodes[mid] if m[0] == 'Node'
607 mid = renumberedways[mid] if m[0] == 'Way'
610 typedmembers << [m[0], mid, m[2]]
614 # assign new contents
615 new_relation.members = typedmembers
616 new_relation.tags = tags
617 new_relation.visible = visible
618 new_relation.changeset_id = changeset_id
619 new_relation.version = version
622 # We're creating the relation
623 new_relation.create_with_history(user)
625 # We're updating the relation
626 new_relation.id = relid
627 relation.update_from(new_relation, user)
629 # We're deleting the relation
630 new_relation.id = relid
631 relation.delete_with_history!(new_relation, user)
636 return [0, '', relid, new_relation.id, new_relation.version]
638 return [0, '', relid, relid, relation.version]
643 # Save a way to the database, including all nodes. Any nodes in the previous
644 # version and no longer used are deleted.
647 # 0. hash of renumbered nodes (added by amf_controller)
648 # 1. current user token (for authentication)
649 # 2. current changeset
652 # 5. list of nodes in way
653 # 6. hash of way tags
654 # 7. array of nodes to change (each one is [lon,lat,id,version,tags]),
655 # 8. hash of nodes to delete (id->version).
658 # 0. '0' (code for success),
660 # 2. original way id (unchanged),
662 # 4. hash of renumbered nodes (old id=>new id),
664 # 6. hash of node versions (node=>version)
666 def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes, deletednodes) #:doc:
667 amf_handle_error("'putway' #{originalway}" ,'way',originalway) do
670 user = getuser(usertoken)
671 if !user then return -1,"You are not logged in, so the way could not be saved." end
672 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
673 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
675 if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
677 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
678 attributes = strip_non_xml_chars attributes
680 originalway = originalway.to_i
681 pointlist.collect! {|a| a.to_i }
683 way=nil # this is returned, so scope it outside the transaction
687 # -- Update each changed node
695 if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end
696 if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end
697 if renumberednodes[id] then id = renumberednodes[id] end
700 node.changeset_id = changeset_id
705 # fixup node tags in a way as well
706 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
707 node.tags = strip_non_xml_chars node.tags
709 node.tags.delete('created_by')
710 node.version = version
712 # We're creating the node
713 node.create_with_history(user)
714 renumberednodes[id] = node.id
715 nodeversions[node.id] = node.version
717 # We're updating an existing node
718 previous=Node.find(id)
720 previous.update_from(node, user)
721 nodeversions[previous.id] = previous.version
725 # -- Save revised way
727 pointlist.collect! {|a|
728 renumberednodes[a] ? renumberednodes[a]:a
731 new_way.tags = attributes
732 new_way.nds = pointlist
733 new_way.changeset_id = changeset_id
734 new_way.version = wayversion
736 new_way.create_with_history(user)
737 way=new_way # so we can get way.id and way.version
739 way = Way.find(originalway)
740 if way.tags!=attributes or way.nds!=pointlist or !way.visible?
741 new_way.id=originalway
742 way.update_from(new_way, user)
746 # -- Delete unwanted nodes
748 deletednodes.each do |id,v|
749 node = Node.find(id.to_i)
751 new_node.changeset_id = changeset_id
752 new_node.version = v.to_i
753 new_node.id = id.to_i
755 node.delete_with_history!(new_node, user)
756 rescue OSM::APIPreconditionFailedError => ex
757 # We don't do anything here as the node is being used elsewhere
758 # and we don't want to delete it
764 [0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
768 # Save POI to the database.
769 # Refuses save if the node has since become part of a way.
770 # Returns array with:
772 # 1. success message,
773 # 2. original node id (unchanged),
777 def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
778 amf_handle_error("'putpoi' #{id}", 'node',id) do
779 user = getuser(usertoken)
780 if !user then return -1,"You are not logged in, so the point could not be saved." end
781 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
782 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
784 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
785 tags = strip_non_xml_chars tags
788 visible = (visible.to_i == 1)
796 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
799 # We always need a new node, based on the data that has been sent to us
802 new_node.changeset_id = changeset_id
803 new_node.version = version
808 # We're creating the node
809 new_node.create_with_history(user)
811 # We're updating the node
813 node.update_from(new_node, user)
815 # We're deleting the node
817 node.delete_with_history!(new_node, user)
823 return [0, '', id, new_node.id, new_node.version]
825 return [0, '', id, node.id, node.version]
830 # Read POI from database
831 # (only called on revert: POIs are usually read by whichways).
833 # Returns array of id, long, lat, hash of tags, (current) version.
835 def getpoi(id,timestamp) #:doc:
836 amf_handle_error("'getpoi' #{id}" ,'node',id) do
840 unless timestamp == ''
841 n = OldNode.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
845 return [0, '', n.id, n.lon, n.lat, n.tags, v]
847 return [-4, 'node', id]
852 # Delete way and all constituent nodes.
856 # * the id of the way to change
857 # * the version of the way that was downloaded
858 # * a hash of the id and versions of all the nodes that are in the way, if any
859 # of the nodes have been changed by someone else then, there is a problem!
860 # Returns 0 (success), unchanged way id, new way version, new node versions.
862 def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:
863 amf_handle_error("'deleteway' #{way_id}" ,'way', way_id) do
864 user = getuser(usertoken)
865 unless user then return -1,"You are not logged in, so the way could not be deleted." end
866 unless user.active_blocks.empty? then return -1,t('application.setup_user_auth.blocked') end
867 if REQUIRE_TERMS_AGREED and user.terms_agreed.nil? then return -1,"You must accept the contributor terms before you can edit." end
871 old_way=nil # returned, so scope it outside the transaction
872 # Need a transaction so that if one item fails to delete, the whole delete fails.
877 old_way = Way.find(way_id)
879 delete_way.version = way_version
880 delete_way.changeset_id = changeset_id
881 delete_way.id = way_id
882 old_way.delete_with_history!(delete_way, user)
884 # -- Delete unwanted nodes
886 deletednodes.each do |id,v|
887 node = Node.find(id.to_i)
889 new_node.changeset_id = changeset_id
890 new_node.version = v.to_i
891 new_node.id = id.to_i
893 node.delete_with_history!(new_node, user)
894 nodeversions[node.id]=node.version
895 rescue OSM::APIPreconditionFailedError => ex
896 # We don't do anything with the exception as the node is in use
897 # elsewhere and we don't want to delete it
902 [0, '', way_id, old_way.version, nodeversions]
907 # ====================================================================
911 # (can also be of form user:pass)
912 # When we are writing to the api, we need the actual user model,
913 # not just the id, hence this abstraction
915 def getuser(token) #:doc:
916 if (token =~ /^(.+)\:(.+)$/) then
917 user = User.authenticate(:username => $1, :password => $2)
919 user = User.authenticate(:token => token)
925 Dir.glob("#{Rails.root}/config/potlatch/locales/*").collect { |f| File.basename(f, ".yml") }
929 # check that all key-value pairs are valid UTF-8.
932 return false unless UTF8.valid? k
933 return false unless UTF8.valid? v
939 # strip characters which are invalid in XML documents from the strings
940 # in the +tags+ hash.
941 def strip_non_xml_chars(tags)
945 new_k = k.delete "\000-\037", "^\011\012\015"
946 new_v = v.delete "\000-\037", "^\011\012\015"
947 new_tags[new_k] = new_v
953 # ====================================================================
954 # Alternative SQL queries for getway/whichways
956 def sql_find_ways_in_area(xmin,ymin,xmax,ymax)
958 SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version
959 FROM current_way_nodes
960 INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id
961 INNER JOIN current_ways ON current_ways.id =current_way_nodes.id
962 WHERE current_nodes.visible=TRUE
963 AND current_ways.visible=TRUE
964 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
966 return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] }
969 def sql_find_pois_in_area(xmin,ymin,xmax,ymax)
972 SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version
974 LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id
975 WHERE current_nodes.visible=TRUE
977 AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")}
979 ActiveRecord::Base.connection.select_all(sql).each do |row|
981 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
982 poitags[n['k']]=n['v']
984 pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i]
989 def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids)
990 # ** It would be more Potlatchy to get relations for nodes within ways
991 # during 'getway', not here
993 SELECT DISTINCT cr.id AS relid,cr.version AS version
994 FROM current_relations cr
995 INNER JOIN current_relation_members crm ON crm.id=cr.id
996 INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='Node'
997 WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")}
999 unless way_ids.empty?
1002 SELECT DISTINCT cr.id AS relid,cr.version AS version
1003 FROM current_relations cr
1004 INNER JOIN current_relation_members crm ON crm.id=cr.id
1005 WHERE crm.member_type='Way'
1006 AND crm.member_id IN (#{way_ids.join(',')})
1009 ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
1012 def sql_get_nodes_in_way(wayid)
1015 SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id,current_nodes.version
1016 FROM current_way_nodes,current_nodes
1017 WHERE current_way_nodes.id=#{wayid.to_i}
1018 AND current_way_nodes.node_id=current_nodes.id
1019 AND current_nodes.visible=TRUE
1020 ORDER BY sequence_id
1022 ActiveRecord::Base.connection.select_all(sql).each do |row|
1024 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n|
1025 nodetags[n['k']]=n['v']
1027 nodetags.delete('created_by')
1028 points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags,row['version'].to_i]
1033 def sql_get_tags_in_way(wayid)
1035 ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row|
1036 tags[row['k']]=row['v']
1041 def sql_get_way_version(wayid)
1042 ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}")['version']
1045 def sql_get_way_user(wayid)
1046 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']