+# AMF Controller is a semi-standalone API for Flash clients, particularly Potlatch.
+# All interaction between Potlatch (as a .SWF application) and the
+# OSM database takes place using this controller. Messages are
+# encoded in the Actionscript Message Format (AMF).
+#
+# See Also Potlatch::Potlatch and Potlatch::AMF
+#
+# Public domain.
+# editions Systeme D / Richard Fairhurst 2004-2008
+#
+# All in/out parameters are floats unless explicitly stated.
+#
+# to trap errors (getway_old,putway,putpoi,deleteway only):
+# return(-1,"message") <-- just puts up a dialogue
+# return(-2,"message") <-- also asks the user to e-mail me
+# to log:
+# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
class AmfController < ApplicationController
require 'stringio'
- # Still to do:
- # - all db interaction
- # - user authentication
- # - (also pass lat/lon through from view tab to edit tab)
+ include Potlatch
- # ====================================================================
- # Main AMF handler
-
- # ---- talk process AMF request
+ session :off
+ before_filter :check_write_availability
+ # Main AMF handler. Tha talk method takes in AMF, figures out what to do and dispatched to the appropriate private method
def talk
- req=StringIO.new(request.raw_post) # Get POST data as request
- req.read(2) # Skip version indicator and client ID
- results={} # Results of each body
-
- # -------------
- # Parse request
-
- headers=getint(req) # Read number of headers
- for i in (1..headers) # Read each header
- name=getstring(req) # |
- req.getc # | skip boolean
- value=getvalue(req) # |
- header["name"]=value # |
- end
+ req=StringIO.new(request.raw_post+0.chr) # Get POST data as request
+ # (cf http://www.ruby-forum.com/topic/122163)
+ req.read(2) # Skip version indicator and client ID
+ results={} # Results of each body
+ renumberednodes={} # Shared across repeated putways
+ renumberedways={} # Shared across repeated putways
- bodies=getint(req) # Read number of bodies
- for i in (1..bodies) # Read each body
- message=getstring(req) # | get message name
- index=getstring(req) # | get index in response sequence
- bytes=getlong(req) # | get total size in bytes
- args=getvalue(req) # | get response (probably an array)
-
- case message
- when 'getpresets'; results[index]=putdata(index,getpresets)
- when 'whichways'; results[index]=putdata(index,whichways(args))
- when 'getway'; results[index]=putdata(index,getway(args))
- when 'putway'; results[index]=putdata(index,putway(args))
- when 'deleteway'; results[index]=putdata(index,deleteway(args))
- end
- end
+ # -------------
+ # Parse request
- # ------------------
- # Write out response
+ headers=AMF.getint(req) # Read number of headers
- response.headers["Content-Type"]="application/x-amf"
- a,b=results.length.divmod(256)
- ans=0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
- results.each do |k,v|
- ans+=v
- end
- render :text=>ans
+ headers.times do # Read each header
+ name=AMF.getstring(req) # |
+ req.getc # | skip boolean
+ value=AMF.getvalue(req) # |
+ header["name"]=value # |
+ end
+
+ bodies=AMF.getint(req) # Read number of bodies
+ bodies.times do # Read each body
+ message=AMF.getstring(req) # | get message name
+ index=AMF.getstring(req) # | get index in response sequence
+ bytes=AMF.getlong(req) # | get total size in bytes
+ args=AMF.getvalue(req) # | get response (probably an array)
+
+ case message
+ when 'getpresets'; results[index]=AMF.putdata(index,getpresets)
+ when 'whichways'; results[index]=AMF.putdata(index,whichways(args))
+ when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(args))
+ when 'getway'; results[index]=AMF.putdata(index,getway(args))
+ when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args))
+ when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args))
+ when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args))
+ when 'putway'; r=putway(args,renumberednodes)
+ renumberednodes=r[3]
+ if r[1] != r[2]
+ renumberedways[r[1]] = r[2]
+ end
+ results[index]=AMF.putdata(index,r)
+ when 'putrelation'; results[index]=AMF.putdata(index,putrelation(args, renumberednodes, renumberedways))
+ when 'deleteway'; results[index]=AMF.putdata(index,deleteway(args))
+ when 'putpoi'; results[index]=AMF.putdata(index,putpoi(args))
+ when 'getpoi'; results[index]=AMF.putdata(index,getpoi(args))
+ end
+ end
+ # ------------------
+ # Write out response
+
+ RAILS_DEFAULT_LOGGER.info(" Response: start")
+ a,b=results.length.divmod(256)
+ render :content_type => "application/x-amf", :text => proc { |response, output|
+ output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr
+ results.each do |k,v|
+ output.write(v)
+ end
+ }
+ RAILS_DEFAULT_LOGGER.info(" Response: end")
end
+ private
- # ====================================================================
- # Remote calls
-
- def getpresets
- presets={}
- presetmenus={}; presetmenus['point']=[]; presetmenus['way']=[]
- presetnames={}; presetnames['point']={}; presetnames['way']={}
- presettype=''
- presetcategory=''
-
- File.open("config/potlatch/presets.txt") do |file|
- file.each_line {|line|
- t=line.chomp
- if (t=~/(\w+)\/(\w+)/) then
- presettype=$1
- presetcategory=$2
- presetmenus[presettype].push(presetcategory)
- presetnames[presettype][presetcategory]=["(no preset)"]
- elsif (t=~/^(.+):\s?(.+)$/) then
- pre=$1; kv=$2
- presetnames[presettype][presetcategory].push(pre)
- presets[pre]={}
- kv.split(',').each {|a|
- if (a=~/^(.+)=(.*)$/) then presets[pre][$1]=$2 end
- }
- end
- }
- end
- [presets,presetmenus,presetnames]
- end
+ # Return presets (default tags and crap) to potlatch.
+ # Uses POTLATCH_PRESETS global, set up in OSM::Potlatch
+ def getpresets #:doc:
+ return POTLATCH_PRESETS
+ end
- def whichways(args)
- # to do
- end
-
- def getway(args)
- # to do
- end
-
- def putway(args)
- # to do
- end
-
- def deleteway(args)
- # to do
- end
-
- # need support functions here too:
- # database support functions (readwayquery, createuniquesegments)
- # tag2array, array2tag
- # getuserid
+ # ----- whichways
+ # Find all the way ids and nodes (including tags and projected lat/lng) which aren't part of those ways in an are
+ #
+ # The argument is an array containing the following, in order:
+ # 0. minimum longitude
+ # 1. minimum latitude
+ # 2. maximum longitude
+ # 3. maximum latitude
+ # 4. baselong, 5. basey, 6. masterscale as above
+ def whichways(args) #:doc:
+ xmin = args[0].to_f-0.01
+ ymin = args[1].to_f-0.01
+ xmax = args[2].to_f+0.01
+ ymax = args[3].to_f+0.01
+ baselong = args[4]
+ basey = args[5]
+ masterscale = args[6]
- # ====================================================================
- # AMF read subroutines
-
- # ----- getint return two-byte integer
- # ----- getlong return four-byte long
- # ----- getstring return string with two-byte length
- # ----- getdouble return eight-byte double-precision float
- # ----- getobject return object/hash
- # ----- getarray return numeric array
-
- def getint(s)
- s.getc*256+s.getc
- end
-
- def getlong(s)
- ((s.getc*256+s.getc)*256+s.getc)*256+s.getc
- end
-
- def getstring(s)
- len=s.getc*256+s.getc
- s.read(len)
+ def whichways(xmin, ymin, xmax, ymax) #:doc:
+ xmin -= 0.01; ymin -= 0.01
+ xmax += 0.01; ymax += 0.01
+
+ if POTLATCH_USE_SQL then
+ way_ids = sql_find_way_ids_in_area(xmin, ymin, xmax, ymax)
+ points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
+ relation_ids = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, way_ids)
+ else
+ # find the way ids in an area
+ nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => "current_nodes.visible = 1", :include => :ways)
+ way_ids = nodes_in_area.collect { |node| node.way_ids }.flatten.uniq
+
+ # find the node ids in an area that aren't part of ways
+ nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
+ points = nodes_not_used_in_area.collect { |n| [n.id, n.lon_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash] }
+
+ # find the relations used by those nodes and ways
+ relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => "visible = 1") +
+ Relation.find_for_ways(way_ids, :conditions => "visible = 1")
+ relation_ids = relations.collect { |relation| relation.id }.uniq
end
-
- def getdouble(s)
- a=s.read(8).unpack('G') # G big-endian, E little-endian
- a[0]
+
+ [way_ids, points, relation_ids]
+ end
+
+ # ----- whichways_deleted
+ # return array of deleted ways in current bounding box
+ # in: as whichways
+ # does: finds all deleted ways with a deleted node in bounding box
+ # out: [0] array of way ids
+ def whichways_deleted(args) #:doc:
+ xmin = args[0].to_f-0.01
+ ymin = args[1].to_f-0.01
+ xmax = args[2].to_f+0.01
+ ymax = args[3].to_f+0.01
+ baselong = args[4]
+ basey = args[5]
+ masterscale = args[6]
+
+ def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
+ xmin -= 0.01; ymin -= 0.01
+ xmax += 0.01; ymax += 0.01
+
+ nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => "current_nodes.visible = 0 AND current_ways.visible = 0", :include => :ways_via_history)
+ way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
+
+ [way_ids]
+ end
+
+ # ----- getway
+ # Get a way with all of it's nodes and tags
+ # The input is an array with the following components, in order:
+ # 0. wayid - the ID of the way to get
+ # 1. baselong - origin of SWF map (longitude)
+ # 2. basey - origin of SWF map (latitude)
+ # 3. masterscale - SWF map scale
+ #
+ # The output is an array which contains all the nodes (with projected
+ # latitude and longitude) and tags for a way (and all the nodes tags).
+ # It also has the way's unprojected (WGS84) bbox.
+ #
+ # FIXME: The server really shouldn't be figuring out a ways bounding box and doing projection for potlatch
+ # FIXME: the argument splitting should be done in the 'talk' method, not here
+ def getway(args) #:doc:
+ wayid,baselong,basey,masterscale = args
+ wayid = wayid.to_i
+
+ def getway(wayid) #:doc:
+ if POTLATCH_USE_SQL then
+ points = sql_get_nodes_in_way(wayid)
+ tags = sql_get_tags_in_way(wayid)
+ else
+ # Ideally we would do ":include => :nodes" here but if we do that
+ # then rails only seems to return the first copy of a node when a
+ # way includes a node more than once
+ way = Way.find(wayid)
+ points = way.nodes.collect do |node|
+ [node.lon, node.lat, node.id, nil, node.tags_as_hash]
+ end
+ tags = way.tags
end
-
- def getarray(s)
- len=getlong(s)
- arr=[]
- for i in (0..len-1)
- arr[i]=getvalue(s)
- end
- arr
+
+ [wayid, points, tags]
+ end
+
+ # ----- getway_old
+ # returns old version of way
+ # in: [0] way id,
+ # [1] way version to get (or -1 for "last deleted version")
+ # [2] baselong, [3] basey, [4] masterscale
+ # does: gets old version of way and all constituent nodes
+ # for undelete, always uses the most recent version of each node
+ # (even if it's moved)
+ # for revert, uses the historic version of each node, but if that node is
+ # still visible and has been changed since, generates a new node id
+ # out: [0] 0 (code for success), [1] SWF object name,
+ # [2] array of points (as getway _except_ [3] is node.visible?, 0 or 1),
+ # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox),
+ # [8] way version
+ def getway_old(args) #:doc:
+ RAILS_DEFAULT_LOGGER.info(" Message: getway_old (server is #{SERVER_URL})")
+ # if SERVER_URL=="www.openstreetmap.org" then return -1,"Revert is not currently enabled on the OpenStreetMap server." end
+
+ def getway_old(id, version) #:doc:
+ if version < 0
+ old_way = OldWay.find(:first, :conditions => ['visible = 1 AND id = ?', id], :order => 'version DESC')
+ points = old_way.get_nodes_undelete
+ else
+ old_way = OldWay.find(:first, :conditions => ['id = ? AND version = ?', id, version])
+ points = old_way.get_nodes_revert
end
-
- def getobject(s)
- arr={}
- while (key=getstring(s))
- if (key=='') then break end
- arr[key]=getvalue(s)
- end
- s.getc # skip the 9 'end of object' value
- arr
+
+ old_way.tags['history'] = "Retrieved from v#{old_way.version}"
+
+ [0, id, points, old_way.tags, old_way.version]
+ end
+
+ def getway_history(wayid) #:doc:
+ history = Way.find(wayid).old_ways.collect do |old_way|
+ user = old_way.user.data_public? ? old_way.user.display_name : 'anonymous'
+ [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user]
end
+
+ [history]
+ end
+
+ # Get a relation with all tags and members.
+ # Returns:
+ # 0. relation id,
+ # 1. hash of tags,
+ # 2. list of members.
+
+ def getrelation(relid) #:doc:
+ rel = Relation.find(relid)
+
+ [relid, rel.tags, rel.members]
+ end
+
+ # ----- getrelation
+ # save relation to the database
+ # in: [0] user token (string),
+ # [1] original relation id (may be negative),
+ # [2] hash of tags, [3] list of members,
+ # [4] visible
+ # out: [0] 0 (success), [1] original relation id (unchanged),
+ # [2] new relation id
+ def putrelation(args, renumberednodes, renumberedways) #:doc:
+ usertoken,relid,tags,members,visible=args
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
+
+ def putrelation(renumberednodes, renumberedways, usertoken, relid, tags, members, visible) #:doc:
+ uid = getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the relation could not be saved." end
+
+ relid = relid.to_i
+ visible = visible.to_i
+
+ # create a new relation, or find the existing one
+ if relid <= 0
+ rel = Relation.new
+ else
+ rel = Relation.find(relid)
+ end
+
+ # check the members are all positive, and correctly type
+ typedmembers = []
+ members.each do |m|
+ mid = m[1].to_i
+ if mid < 0
+ mid = renumberednodes[mid] if m[0] == 'node'
+ mid = renumberedways[mid] if m[0] == 'way'
+ if mid < 0
+ return -2, "Negative ID unresolved"
+ end
+ end
+ typedmembers << [m[0], mid, m[2]]
+ end
+
+ # assign new contents
+ rel.members = typedmembers
+ rel.tags = tags
+ rel.visible = visible
+ rel.user_id = uid
+
+ # check it then save it
+ # BUG: the following is commented out because it always fails on my
+ # install. I think it's a Rails bug.
+
+ #if !rel.preconditions_ok?
+ # return -2, "Relation preconditions failed"
+ #else
+ rel.save_with_history!
+ #end
+
+ [0, relid, rel.id]
+ end
+
+ # ----- putway
+ # saves a way to the database
+ # in: [0] user token (string),
+ # [1] original way id (may be negative),
+ # [2] array of points (as getway/getway_old),
+ # [3] hash of way tags,
+ # [4] original way version (0 if not a reverted/undeleted way),
+ # [5] baselong, [6] basey, [7] masterscale
+ # does: saves way to the database
+ # all constituent nodes are created/updated as necessary
+ # (or deleted if they were in the old version and are otherwise unused)
+ # out: [0] 0 (code for success), [1] original way id (unchanged),
+ # [2] new way id, [3] hash of renumbered nodes (old id=>new id),
+ # [4] xmin, [5] xmax, [6] ymin, [7] ymax (unprojected bbox)
+ def putway(args,renumberednodes) #:doc:
+ RAILS_DEFAULT_LOGGER.info(" putway started")
+ usertoken,originalway,points,attributes,oldversion,baselong,basey,masterscale=args
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be saved." end
+
+ def putway(renumberednodes, usertoken, originalway, points, attributes) #:doc:
+
+ # -- Initialise and carry out checks
- # ----- getvalue parse and get value
-
- def getvalue(s)
- case s.getc
- when 0; return getdouble(s) # number
- when 1; return s.getc # boolean
- when 2; return getstring(s) # string
- when 3; return getobject(s) # object/hash
- when 5; return nil # null
- when 6; return nil # undefined
- when 8; s.read(4) # mixedArray
- return getobject(s) # |
- when 10;return getarray(s) # array
- else; return nil # error
- end
+ uid = getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be saved." end
+
+ originalway = originalway.to_i
+
+ points.each do |a|
+ if a[2] == 0 or a[2].nil? then return -2,"Server error - node with id 0 found in way #{originalway}." end
+ if a[1] == 90 then return -2,"Server error - node with lat -90 found in way #{originalway}." end
end
- # ====================================================================
- # AMF write subroutines
-
- # ----- putdata envelope data into AMF writeable form
- # ----- encodevalue pack variables as AMF
-
- def putdata(index,n)
- d =encodestring(index+"/onResult")
- d+=encodestring("null")
- d+=[-1].pack("N")
- d+=encodevalue(n)
+ if points.length < 2 then return -2,"Server error - way is only #{points.length} points long." end
+
+ # -- 3. read original way into memory
+
+ if originalway < 0
+ way = Way.new
+ uniques = []
+ else
+ way = Way.find(originalway)
+ uniques = way.unshared_node_ids
end
-
- def encodevalue(n)
- case n.class.to_s
- when 'Array'
- a=10.chr+encodelong(n.length)
- n.each do |b|
- a+=encodevalue(b)
- end
- a
- when 'Hash'
- a=3.chr
- n.each do |k,v|
- a+=encodestring(k)+encodevalue(v)
- end
- a+0.chr+0.chr+9.chr
- when 'String'
- 2.chr+encodestring(n)
- when 'Bignum','Fixnum','Float'
- 0.chr+encodedouble(n)
- when 'NilClass'
- 5.chr
+
+ # -- 4. get version by inserting new row into ways
+
+ nodes = []
+
+ points.each do |n|
+ lon = n[0].to_f
+ lat = n[1].to_f
+ id = n[2].to_i
+ savenode = false
+
+ if renumberednodes[id]
+ id = renumberednodes[id]
+ elsif id < 0
+ # Create new node
+ node = Node.new
+ savenode = true
+ else
+ node = Node.find(id)
+ if !fpcomp(lat, node.lat) or !fpcomp(lon, node.lon) or
+ Tags.join(n[4]) != node.tags or !node.visible?
+ savenode = true
end
+ end
+
+ if savenode
+ node.user_id = uid
+ node.lat = lat
+ node.lon = lon
+ node.tags = Tags.join(n[4])
+ node.visible = true
+ node.save_with_history!
+
+ if id != node.id
+ renumberednodes[id] = node.id
+ id = node.id
+ end
+ end
+
+ uniques = uniques - [id]
+ nodes.push(id)
end
+
+ # -- Delete any unique nodes
- # ----- encodestring encode string with two-byte length
- # ----- encodedouble encode number as eight-byte double precision float
- # ----- encodelong encode number as four-byte long
-
- def encodestring(n)
- a,b=n.size.divmod(256)
- a.chr+b.chr+n
- end
-
- def encodedouble(n)
- [n].pack('G')
- end
-
- def encodelong(n)
- [n].pack('N')
- end
-
- # ====================================================================
- # Co-ordinate conversion
-
- def lat2coord(a)
- -(lat2y(a)-$basey)*$masterscale+250
- end
-
- def long2coord(a)
- (a-$baselong)*$masterscale+350
+ uniques.each do |n|
+ deleteitemrelations(n, 'node')
+
+ node = Node.find(n)
+ node.user_id = uid
+ node.visible = false
+ node.save_with_history!
end
-
- def lat2y(a)
- 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
+
+ points.each_index do |i|
+ xs=coord2long(points[i][0],masterscale,baselong)
+ ys=coord2lat(points[i][1],masterscale,basey)
+ xmin=[xs,xmin].min; xmax=[xs,xmax].max
+ ymin=[ys,ymin].min; ymax=[ys,ymax].max
+ node=points[i][2].to_i
+ tagstr=array2tag(points[i][4])
+ tagsql="'"+sqlescape(tagstr)+"'"
+ lat=(ys * 10000000).round
+ long=(xs * 10000000).round
+ tile=QuadTile.tile_for_point(ys, xs)
+
+ way.tags = attributes
+ way.nds = nodes
+ way.user_id = uid
+ way.visible = true
+ way.save_with_history!
+
+ [0, originalway, way.id, renumberednodes]
+ end
+
+ # ----- putpoi
+ # save POI to the database
+ # in: [0] user token (string),
+ # [1] original node id (may be negative),
+ # [2] projected longitude, [3] projected latitude,
+ # [4] hash of tags, [5] visible (0 to delete, 1 otherwise),
+ # [6] baselong, [7] basey, [8] masterscale
+ # does: saves POI node to the database
+ # refuses save if the node has since become part of a way
+ # out: [0] 0 (success), [1] original node id (unchanged),
+ # [2] new node id
+ def putpoi(args) #:doc:
+ usertoken,id,x,y,tags,visible,baselong,basey,masterscale=args
+ uid=getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
+
+ def putpoi(usertoken, id, lon, lat, tags, visible) #:doc:
+ uid = getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the point could not be saved." end
+
+ id = id.to_i
+ visible = (visible.to_i == 1)
+
+ if id > 0 then
+ node = Node.find(id)
+
+ if !visible then
+ 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
+ deleteitemrelations(id, 'node')
+ end
+ else
+ node = Node.new
end
-
- def coord2lat(a)
- y2lat((a-250)/-$masterscale+$basey)
+
+ node.user_id = uid
+ node.lat = lat
+ node.lon = lon
+ node.tags = Tags.join(tags)
+ node.visible = visible
+ node.save_with_history!
+
+ [0, id, node.id]
+ end
+
+ # ----- getpoi
+ # read POI from database
+ # (only called on revert: POIs are usually read by whichways)
+ # in: [0] node id, [1] baselong, [2] basey, [3] masterscale
+ # does: reads POI
+ # out: [0] id (unchanged), [1] projected long, [2] projected lat,
+ # [3] hash of tags
+ def getpoi(args) #:doc:
+ id,baselong,basey,masterscale = args
+
+ n = Node.find(id.to_i)
+ if n
+ return [n.id, n.lon_potlatch(baselong,masterscale), n.lat_potlatch(basey,masterscale), n.tags_as_hash]
+ else
+ return [nil,nil,nil,'']
+ end
+ end
+
+ def getpoi(id) #:doc:
+ n = Node.find(id)
+
+ if n
+ return [n.id, n.lon, n.lat, n.tags_as_hash]
+ else
+ return [nil, nil, nil, '']
end
-
- def coord2long(a)
- (a-350)/$masterscale+$baselong
+ end
+
+
+ def deleteway(usertoken, way_id) #:doc:
+ uid = getuserid(usertoken)
+ if !uid then return -1,"You are not logged in, so the way could not be deleted." end
+
+ # FIXME: would be good not to make two history entries when removing
+ # two nodes from the same relation
+ user = User.find(uid)
+ way = Way.find(way_id)
+ way.unshared_node_ids.each do |n|
+ deleteitemrelations(n, 'node')
end
-
- def y2lat(a)
- 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2)
+
+ way.delete_with_relations_and_nodes_and_history(user)
+
+ [0, way_id]
+ end
+
+ def createuniquenodes(way,uqn_name,nodelist) #:doc:
+ # Find nodes which appear in this way but no others
+ sql=<<-EOF
+ CREATE TEMPORARY TABLE #{uqn_name}
+ SELECT a.node_id
+ FROM (SELECT DISTINCT node_id FROM current_way_nodes
+ WHERE id=#{way}) a
+ LEFT JOIN current_way_nodes b
+ ON b.node_id=a.node_id
+ AND b.id!=#{way}
+ WHERE b.node_id IS NULL
+ EOF
+ unless nodelist.empty? then
+ sql+="AND a.node_id NOT IN ("+nodelist.join(',')+")"
+ end
+ ActiveRecord::Base.connection.execute(sql)
+ end
+
+
+
+ # ====================================================================
+ # Relations handling
+ # deleteuniquenoderelations(uqn_name,uid,db_now)
+ # deleteitemrelations(way|node,'way'|'node',uid,db_now)
+
+ def deleteuniquenoderelations(uqn_name,uid,db_now) #:doc:
+ sql=<<-EOF
+ SELECT node_id,cr.id FROM #{uqn_name},current_relation_members crm,current_relations cr
+ WHERE crm.member_id=node_id
+ AND crm.member_type='node'
+ AND crm.id=cr.id
+ AND cr.visible=1
+ EOF
+
+ def deleteitemrelations(objid, type) #:doc:
+ relations = RelationMember.find(:all,
+ :conditions => ['member_type = ? and member_id = ?', type, objid],
+ :include => :relation).collect { |rm| rm.relation }.uniq
+
+ relations.each do |rel|
+ rel.members.delete_if { |x| x[0] == type and x[1] == objid }
+ rel.save_with_history!
end
+ end
+
+ def deleteitemrelations(objid,type,uid,db_now) #:doc:
+ sql=<<-EOF
+ SELECT cr.id FROM current_relation_members crm,current_relations cr
+ WHERE crm.member_id=#{objid}
+ AND crm.member_type='#{type}'
+ AND crm.id=cr.id
+ AND cr.visible=1
+ EOF
+ relways=ActiveRecord::Base.connection.select_all(sql)
+ relways.each do |a|
+ removefromrelation(objid,type,a['id'],uid,db_now)
+ end
+ end
+
+ def removefromrelation(objid,type,relation,uid,db_now) #:doc:
+ rver=ActiveRecord::Base.connection.insert("INSERT INTO relations (id,user_id,timestamp,visible) VALUES (#{relation},#{uid},#{db_now},1)")
+
+ tagsql=<<-EOF
+ INSERT INTO relation_tags (id,k,v,version)
+ SELECT id,k,v,#{rver} FROM current_relation_tags
+ WHERE id=#{relation}
+ EOF
+ ActiveRecord::Base.connection.insert(tagsql)
+
+ membersql=<<-EOF
+ INSERT INTO relation_members (id,member_type,member_id,member_role,version)
+ SELECT id,member_type,member_id,member_role,#{rver} FROM current_relation_members
+ WHERE id=#{relation}
+ AND (member_id!=#{objid} OR member_type!='#{type}')
+ EOF
+ ActiveRecord::Base.connection.insert(membersql)
+
+ ActiveRecord::Base.connection.update("UPDATE current_relations SET user_id=#{uid},timestamp=#{db_now} WHERE id=#{relation}")
+ ActiveRecord::Base.connection.execute("DELETE FROM current_relation_members WHERE id=#{relation} AND member_type='#{type}' AND member_id=#{objid}")
+ end
+
+ def sqlescape(a) #:doc:
+ a.gsub(/[\000-\037]/,"").gsub("'","''").gsub(92.chr) {92.chr+92.chr}
+ end
+
+ def tag2array(a) #:doc:
+ tags={}
+ Tags.split(a) do |k, v|
+ tags[k.gsub(':','|')]=v
+ end
+ tags
+ end
+
+ def array2tag(a) #:doc:
+ tags = []
+ a.each do |k,v|
+ if v=='' then next end
+ if v[0,6]=='(type ' then next end
+ tags << [k.gsub('|',':'), v]
+ end
+ return Tags.join(tags)
+ end
+
+ def getuserid(token) #:doc:
+ if (token =~ /^(.+)\+(.+)$/) then
+ user = User.authenticate(:username => $1, :password => $2)
+ else
+ user = User.authenticate(:token => token)
+ end
+
+ return user ? user.id : nil;
+ end
+
+ # ====================================================================
+ # Co-ordinate conversion
+
+ def lat2coord(a,basey,masterscale) #:doc:
+ -(lat2y(a)-basey)*masterscale
+ end
+
+ def long2coord(a,baselong,masterscale) #:doc:
+ (a-baselong)*masterscale
+ end
+
+ def lat2y(a) #:doc:
+ 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
+ end
+
+ def coord2lat(a,masterscale,basey) #:doc:
+ y2lat(a/-masterscale+basey)
+ end
+
+ def coord2long(a,masterscale,baselong) #:doc:
+ a/masterscale+baselong
+ end
+
+ def y2lat(a)
+ 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2)
+ end
end
+
+# Local Variables:
+# indent-tabs-mode: t
+# tab-width: 4
+# End:
projects / rails.git / blobdiff