X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/e5a5f957ef46d76ec78e2c0450b50a086dff82b6..afcb345014d98914cd4f5d6b14ca2e30feac194c:/app/controllers/amf_controller.rb diff --git a/app/controllers/amf_controller.rb b/app/controllers/amf_controller.rb index 38c567734..e701f2170 100644 --- a/app/controllers/amf_controller.rb +++ b/app/controllers/amf_controller.rb @@ -1,319 +1,935 @@ +# 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). +# +# Helper functions are in /lib/potlatch.rb +# +# Author:: editions Systeme D / Richard Fairhurst 2004-2008 +# Licence:: public domain. +# +# == General structure +# +# Apart from the amf_read and amf_write methods (which distribute the requests +# from the AMF message), each method generally takes arguments in the order +# they were sent by the Potlatch SWF. Do not assume typing has been preserved. +# Methods all return an array to the SWF. +# +# == API 0.6 +# +# Note that this requires a patched version of composite_primary_keys 1.1.0 +# (see http://groups.google.com/group/compositekeys/t/a00e7562b677e193) +# if you are to run with POTLATCH_USE_SQL=false . +# +# == Debugging +# +# Any method that returns a status code (0 for ok) can also send: +# return(-1,"message") <-- just puts up a dialogue +# return(-2,"message") <-- also asks the user to e-mail me +# +# To write to the Rails log, use logger.info("message"). + +# Remaining issues: +# * version conflict when POIs and ways are reverted + 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 -# to log: -# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}") + # Help methods for checking boundary sanity and area size + include MapBoundary + session :off + before_filter :check_write_availability - # ==================================================================== - # Main AMF handler + # Main AMF handlers: process the raw AMF string (using AMF library) and + # calls each action (private method) accordingly. + # ** FIXME: refactor to reduce duplication of code across read/write - # ---- talk process AMF request - - 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 + def amf_read + 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 - 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) + logger.info("Executing AMF #{message}:#{index}") + 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[0].to_i)) + when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i)) + when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1])) + when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i)) + when 'getnode_history'; results[index]=AMF.putdata(index,getnode_history(args[0].to_i)) + when 'findgpx'; results[index]=AMF.putdata(index,findgpx(*args)) + when 'findrelations'; results[index]=AMF.putdata(index,findrelations(*args)) + when 'getpoi'; results[index]=AMF.putdata(index,getpoi(*args)) + end + end + logger.info("encoding AMF results") + sendresponse(results) end + def amf_write + req=StringIO.new(request.raw_post+0.chr) + req.read(2) + results={} + renumberednodes={} # Shared across repeated putways + renumberedways={} # Shared across repeated putways - # ==================================================================== - # 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 + headers=AMF.getint(req) # Read number of headers + headers.times do # Read each header + name=AMF.getstring(req) # | + req.getc # | skip boolean + value=AMF.getvalue(req) # | + header["name"]=value # | + end - def whichways(args) - waylist=WaySegment.find_by_sql("SELECT DISTINCT current_way_segments.id AS wayid"+ - " FROM current_way_segments,current_segments,current_nodes "+ - " WHERE segment_id=current_segments.id "+ - " AND node_a=current_nodes.id "+ - " AND (latitude BETWEEN "+(args[1].to_f-0.01).to_s+" AND "+(args[3].to_f+0.01).to_s+") "+ - " AND (longitude BETWEEN "+(args[0].to_f-0.01).to_s+" AND "+(args[2].to_f+0.01).to_s+")") - ways=[] - waylist.each {|a| - ways< ["current_nodes.visible = ?", true], :include => :ways) + ways = nodes_in_area.inject([]) { |sum, node| + visible_ways = node.ways.select { |w| w.visible? } + sum + visible_ways.collect { |w| [w.id,w.version] } + }.uniq + ways.delete([]) + + # 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, n.lat, n.tags, n.version] }.uniq + + # find the relations used by those nodes and ways + relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) + + Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true}) + relations = relations.collect { |relation| [relation.id,relation.version] }.uniq + end + + [0, ways, points, relations] + + rescue Exception => err + [-2,"Sorry - I can't get the map for that area."] + end + + # Find deleted ways in current bounding box (similar to whichways, but ways + # with a deleted node only - not POIs or relations). + + def whichways_deleted(xmin, ymin, xmax, ymax) #:doc: + enlarge = [(xmax-xmin)/8,0.01].min + xmin -= enlarge; ymin -= enlarge + xmax += enlarge; ymax += enlarge + + # check boundary is sane and area within defined + # see /config/application.yml + begin + check_boundaries(xmin, ymin, xmax, ymax) + rescue Exception => err + return [-2,"Sorry - I can't get the map for that area."] + end + + nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history) + way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq + + [0,way_ids] + end + + # Get a way including nodes and tags. + # Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number. + + def getway(wayid) #:doc: + if POTLATCH_USE_SQL then + points = sql_get_nodes_in_way(wayid) + tags = sql_get_tags_in_way(wayid) + version = sql_get_way_version(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 + begin + way = Way.find(wayid) + rescue ActiveRecord::RecordNotFound + return [wayid,[],{}] + end + + # check case where way has been deleted or doesn't exist + return [wayid,[],{}] if way.nil? or !way.visible + + points = way.nodes.collect do |node| + nodetags=node.tags + nodetags.delete('created_by') + [node.lon, node.lat, node.id, nodetags, node.version] + end + tags = way.tags + version = way.version + end + + [wayid, points, tags, version] + end + + # Get an old version of a way, and all constituent nodes. + # + # For undelete (version<0), always uses the most recent version of each node, + # even if it's moved. For revert (version >= 0), uses the node in existence + # at the time, generating a new id if it's still visible and has been moved/ + # retagged. + # + # Returns: + # 0. success code, + # 1. id, + # 2. array of points, + # 3. hash of tags, + # 4. version, + # 5. is this the current, visible version? (boolean) + + def getway_old(id, timestamp) #:doc: + if timestamp == '' + # undelete + old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC') + points = old_way.get_nodes_undelete unless old_way.nil? + else + begin + # revert + timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S") + old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC') + unless old_way.nil? + points = old_way.get_nodes_revert(timestamp) + if !old_way.visible + return [-1, "Sorry, the way was deleted at that time - please revert to a previous version."] + end + end + rescue ArgumentError + # thrown by date parsing method. leave old_way as nil for + # the superb error handler below. + end + end + + if old_way.nil? + # *** FIXME: shouldn't this be returning an error? + return [-1, id, [], {}, -1,0] + else + curway=Way.find(id) + old_way.tags['history'] = "Retrieved from v#{old_way.version}" + return [0, id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)] + end + end + + # Find history of a way. + # Returns 'way', id, and an array of previous versions: + # - formerly [old_way.version, old_way.timestamp.strftime("%d %b %Y, %H:%M"), old_way.visible ? 1 : 0, user, uid] + # - now [timestamp,user,uid] + # + # Heuristic: Find all nodes that have ever been part of the way; + # get a list of their revision dates; add revision dates of the way; + # sort and collapse list (to within 2 seconds); trim all dates before the + # start date of the way. + + def getway_history(wayid) #:doc: + + begin + # Find list of revision dates for way and all constituent nodes + revdates=[] + revusers={} + Way.find(wayid).old_ways.collect do |a| + revdates.push(a.timestamp) + unless revusers.has_key?(a.timestamp.to_i) then revusers[a.timestamp.to_i]=change_user(a) end + a.nds.each do |n| + Node.find(n).old_nodes.collect do |o| + revdates.push(o.timestamp) + unless revusers.has_key?(o.timestamp.to_i) then revusers[o.timestamp.to_i]=change_user(o) end + end + end + end + waycreated=revdates[0] + revdates.uniq! + revdates.sort! + revdates.reverse! + + # Remove any dates (from nodes) before first revision date of way + revdates.delete_if { |d| d0 then + gpx = Trace.find(searchterm.to_i, :conditions => ["visible=? AND (public=? OR user_id=?)",true,true,user.id] ) + if gpx then + gpxs.push([gpx.id, gpx.name, gpx.description]) + end + else + Trace.find(:all, :limit => 21, :conditions => ["visible=? AND (public=? OR user_id=?) AND MATCH(name) AGAINST (?)",true,true,user.id,searchterm] ).each do |gpx| + gpxs.push([gpx.id, gpx.name, gpx.description]) + end end - - # ==================================================================== - # Co-ordinate conversion - - def lat2coord(a) - -(lat2y(a)-$basey)*$masterscale+250 + gpxs + end + + # Get a relation with all tags and members. + # Returns: + # 0. relation id, + # 1. hash of tags, + # 2. list of members, + # 3. version. + + def getrelation(relid) #:doc: + begin + rel = Relation.find(relid) + rescue ActiveRecord::RecordNotFound + return [relid, {}, []] + end + + return [relid, {}, [], nil] if rel.nil? or !rel.visible + [relid, rel.tags, rel.members, rel.version] + end + + # Find relations with specified name/id. + # Returns array of relations, each in same form as getrelation. + + def findrelations(searchterm) + rels = [] + if searchterm.to_i>0 then + rel = Relation.find(searchterm.to_i) + if rel and rel.visible then + rels.push([rel.id, rel.tags, rel.members]) + end + else + RelationTag.find(:all, :limit => 11, :conditions => ["match(v) against (?)", searchterm] ).each do |t| + if t.relation.visible then + rels.push([t.relation.id, t.relation.tags, t.relation.members]) + end + end end + rels + end + + # Save a relation. + # Returns + # 0. 0 (success), + # 1. original relation id (unchanged), + # 2. new relation id. + + def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc: + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the relation could not be saved." end + + relid = relid.to_i + visible = (visible.to_i != 0) + + new_relation = nil + relation = nil + Relation.transaction do + # create a new relation, or find the existing one + if relid > 0 + relation = Relation.find(relid) + end + # We always need a new node, based on the data that has been sent to us + new_relation = Relation.new + + # 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' + end + if mid + typedmembers << [m[0], mid, m[2]] + end + end + + # assign new contents + new_relation.members = typedmembers + new_relation.tags = tags + new_relation.visible = visible + new_relation.changeset_id = changeset_id + new_relation.version = version + + + if id <= 0 + # We're creating the node + new_relation.create_with_history(user) + elsif visible + # We're updating the node + relation.update_from(new_relation, user) + else + # We're deleting the node + relation.delete_with_history!(new_relation, user) + end + end # transaction + + if id <= 0 + return [0, relid, new_relation.id, new_relation.version] + else + return [0, relid, relation.id, relation.version] + end + rescue OSM::APIChangesetAlreadyClosedError => ex + return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}."] + rescue OSM::APIVersionMismatchError => ex + # Really need to check to see whether this is a server load issue, and the + # last version was in the same changeset, or belongs to the same user, then + # we can return something different + return [-3, "Sorry, someone else has changed this relation since you started editing. Please click the 'Edit' tab to reload the area."] + rescue OSM::APIAlreadyDeletedError => ex + return [-1, "The relation has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "Something really bad happened :-( ."] + end + + # Save a way to the database, including all nodes. Any nodes in the previous + # version and no longer used are deleted. + # + # Parameters: + # 0. hash of renumbered nodes (added by amf_controller) + # 1. current user token (for authentication) + # 2. current changeset + # 3. new way version + # 4. way ID + # 5. list of nodes in way + # 6. hash of way tags + # 7. array of nodes to change (each one is [lon,lat,id,version,tags]) + # + # Returns: + # 0. '0' (code for success), + # 1. original way id (unchanged), + # 2. new way id, + # 3. hash of renumbered nodes (old id=>new id), + # 4. way version, + # 5. hash of node versions (node=>version) + + def putway(renumberednodes, usertoken, changeset_id, wayversion, originalway, pointlist, attributes, nodes) #:doc: + + # -- Initialise - def long2coord(a) - (a-$baselong)*$masterscale+350 - end + user = getuser(usertoken) + if !user then return -1,"You are not logged in, so the way could not be saved." end + if pointlist.length < 2 then return -2,"Server error - way is only #{points.length} points long." end + + originalway = originalway.to_i + pointlist.collect! {|a| a.to_i } + + way=nil # this is returned, so scope it outside the transaction + nodeversions = {} + Way.transaction do + + # -- Get unique nodes + + if originalway <= 0 + uniques = [] + else + way = Way.find(originalway) + uniques = way.unshared_node_ids + end + + #-- Update each changed node + + nodes.each do |a| + lon = a[0].to_f + lat = a[1].to_f + id = a[2].to_i + version = a[3].to_i + if id == 0 then return -2,"Server error - node with id 0 found in way #{originalway}." end + if lat== 90 then return -2,"Server error - node with latitude -90 found in way #{originalway}." end + if renumberednodes[id] then id = renumberednodes[id] end + + node = Node.new + node.changeset_id = changeset_id + node.lat = lat + node.lon = lon + node.tags = a[4] + node.tags.delete('created_by') + node.version = version + if id <= 0 + # We're creating the node + node.create_with_history(user) + renumberednodes[id] = node.id + nodeversions[node.id] = node.version + else + # We're updating an existing node + previous=Node.find(id) + previous.update_from(node, user) + nodeversions[previous.id] = previous.version + end + end + + # -- Save revised way + + pointlist.collect! {|a| + renumberednodes[a] ? renumberednodes[a]:a + } # renumber nodes + new_way = Way.new + new_way.tags = attributes + new_way.nds = pointlist + new_way.changeset_id = changeset_id + new_way.version = wayversion + if originalway <= 0 + new_way.create_with_history(user) + way=new_way # so we can get way.id and way.version + elsif way.tags!=attributes or way.nds!=pointlist or !way.visible? + way.update_from(new_way, user) + end + + # -- Delete any unique nodes no longer used + + uniques=uniques-pointlist + uniques.each do |n| + node = Node.find(n) + deleteitemrelations(user, changeset_id, id, 'node', node.version) + new_node = Node.new + new_node.changeset_id = changeset_id + new_node.version = node.version + node.delete_with_history!(new_node, user) + end + + end # transaction + + [0, originalway, way.id, renumberednodes, way.version, nodeversions] + rescue OSM::APIChangesetAlreadyClosedError => ex + return [-2, "Sorry, your changeset #{ex.changeset.id} has been closed (at #{ex.changeset.closed_at})."] + rescue OSM::APIVersionMismatchError => ex + # Really need to check to see whether this is a server load issue, and the + # last version was in the same changeset, or belongs to the same user, then + # we can return something different + return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."] + rescue OSM::APITooManyWayNodesError => ex + return [-1, "You have tried to upload a really long way with #{ex.provided} points: only #{ex.max} are allowed."] + rescue OSM::APIAlreadyDeletedError => ex + return [-1, "The point has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "Something really bad happened :-(."] + end + + # Save POI to the database. + # Refuses save if the node has since become part of a way. + # Returns array with: + # 0. 0 (success), + # 1. original node id (unchanged), + # 2. new node id, + # 3. version. + + def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc: + user = getuser(usertoken) + if !user 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) + node = nil + new_node = nil + Node.transaction do + 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 + end + end + # We always need a new node, based on the data that has been sent to us + new_node = Node.new + + new_node.changeset_id = changeset_id + new_node.version = version + new_node.lat = lat + new_node.lon = lon + new_node.tags = tags + if id <= 0 + # We're creating the node + new_node.create_with_history(user) + elsif visible + # We're updating the node + node.update_from(new_node, user) + else + # We're deleting the node + node.delete_with_history!(new_node, user) + end + end # transaction + + if id <= 0 + return [0, id, new_node.id, new_node.version] + else + return [0, id, node.id, node.version] + end + rescue OSM::APIChangesetAlreadyClosedError => ex + return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"] + rescue OSM::APIVersionMismatchError => ex + # Really need to check to see whether this is a server load issue, and the + # last version was in the same changeset, or belongs to the same user, then + # we can return something different + return [-3, "Sorry, someone else has changed this point since you started editing. Please click the 'Edit' tab to reload the area."] + rescue OSM::APIAlreadyDeletedError => ex + return [-1, "The point has already been deleted"] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "Something really bad happened :-()"] + end + + # Read POI from database + # (only called on revert: POIs are usually read by whichways). + # + # Returns array of id, long, lat, hash of tags, version. + + def getpoi(id,timestamp) #:doc: + if timestamp == '' then + n = Node.find(id) + else + n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")]) + end + + if n + return [n.id, n.lon, n.lat, n.tags, n.version] + else + return [nil, nil, nil, {}, nil] + end + end + + # Delete way and all constituent nodes. Also removes from any relations. + # Params: + # * The user token + # * the changeset id + # * the id of the way to change + # * the version of the way that was downloaded + # * a hash of the id and versions of all the nodes that are in the way, if any + # of the nodes have been changed by someone else then, there is a problem! + # Returns 0 (success), unchanged way id. + + def deleteway(usertoken, changeset_id, way_id, way_version, node_id_version) #:doc: + user = getuser(usertoken) + unless user then return -1,"You are not logged in, so the way could not be deleted." end + + way_id = way_id.to_i + # Need a transaction so that if one item fails to delete, the whole delete fails. + Way.transaction do + + # delete the way + old_way = Way.find(way_id) + delete_way = Way.new + delete_way.version = way_version + delete_way.changeset_id = changeset_id + old_way.delete_with_history!(delete_way, user) + + old_way.unshared_node_ids.each do |node_id| + # delete the node + node = Node.find(node_id) + delete_node = Node.new + delete_node.changeset_id = changeset_id + if node_id_version[node_id.to_s] + delete_node.version = node_id_version[node_id.to_s] + else + # in case the node wasn't passed (i.e. if it was previously removed + # from the way in Potlatch) + deleteitemrelations(user, changeset_id, node_id, 'node', node.version) + delete_node.version = node.version + end + node.delete_with_history!(delete_node, user) + end + end # transaction + [0, way_id] + rescue OSM::APIChangesetAlreadyClosedError => ex + return [-1, "The changeset #{ex.changeset.id} was closed at #{ex.changeset.closed_at}"] + rescue OSM::APIVersionMismatchError => ex + # Really need to check to see whether this is a server load issue, and the + # last version was in the same changeset, or belongs to the same user, then + # we can return something different + return [-3, "Sorry, someone else has changed this way since you started editing. Please click the 'Edit' tab to reload the area."] + rescue OSM::APIAlreadyDeletedError => ex + return [-1, "The way has already been deleted."] + rescue OSM::APIError => ex + # Some error that we don't specifically catch + return [-2, "Something really bad happened :-( ."] + end + + + # ==================================================================== + # Support functions + + # Remove a node or way from all relations + # This is only used by putway and deleteway when deleting nodes removed + # from a way (because Potlatch itself doesn't keep track of these - + # possible FIXME). + + def deleteitemrelations(user, changeset_id, objid, type, version) #: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 } + new_rel = Relation.new + new_rel.tags = rel.tags + new_rel.visible = rel.visible + new_rel.version = rel.version + new_rel.members = rel.members + new_rel.changeset_id = changeset_id + rel.update_from(new_rel, user) + end + end + + # Authenticate token + # (can also be of form user:pass) + # When we are writing to the api, we need the actual user model, + # not just the id, hence this abstraction + + def getuser(token) #:doc: + if (token =~ /^(.+)\:(.+)$/) then + user = User.authenticate(:username => $1, :password => $2) + else + user = User.authenticate(:token => token) + end + return user + end + + # Send AMF response + + def sendresponse(results) + a,b=results.length.divmod(256) + render :content_type => "application/x-amf", :text => proc { |response, output| + # ** move amf writing loop into here - + # basically we read the messages in first (into an array of some sort), + # then iterate through that array within here, and do all the AMF writing + output.write 0.chr+0.chr+0.chr+0.chr+a.chr+b.chr + results.each do |k,v| + output.write(v) + end + } + end + + + # ==================================================================== + # Alternative SQL queries for getway/whichways + + def sql_find_ways_in_area(xmin,ymin,xmax,ymax) + sql=<<-EOF + SELECT DISTINCT current_ways.id AS wayid,current_ways.version AS version + FROM current_way_nodes + INNER JOIN current_nodes ON current_nodes.id=current_way_nodes.node_id + INNER JOIN current_ways ON current_ways.id =current_way_nodes.id + WHERE current_nodes.visible=TRUE + AND current_ways.visible=TRUE + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + EOF + return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['wayid'].to_i,a['version'].to_i] } + end - def lat2y(a) - 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2)) - end + def sql_find_pois_in_area(xmin,ymin,xmax,ymax) + pois=[] + sql=<<-EOF + SELECT current_nodes.id,current_nodes.latitude*0.0000001 AS lat,current_nodes.longitude*0.0000001 AS lon,current_nodes.version + FROM current_nodes + LEFT OUTER JOIN current_way_nodes cwn ON cwn.node_id=current_nodes.id + WHERE current_nodes.visible=TRUE + AND cwn.id IS NULL + AND #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "current_nodes.")} + EOF + ActiveRecord::Base.connection.select_all(sql).each do |row| + poitags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n| + poitags[n['k']]=n['v'] + end + pois << [row['id'].to_i, row['lon'].to_f, row['lat'].to_f, poitags, row['version'].to_i] + end + pois + end - def coord2lat(a) - y2lat((a-250)/-$masterscale+$basey) - end + def sql_find_relations_in_area_and_ways(xmin,ymin,xmax,ymax,way_ids) + # ** It would be more Potlatchy to get relations for nodes within ways + # during 'getway', not here + sql=<<-EOF + SELECT DISTINCT cr.id AS relid,cr.version AS version + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + INNER JOIN current_nodes cn ON crm.member_id=cn.id AND crm.member_type='node' + WHERE #{OSM.sql_for_area(ymin, xmin, ymax, xmax, "cn.")} + EOF + unless way_ids.empty? + sql+=<<-EOF + UNION + SELECT DISTINCT cr.id AS relid,cr.version AS version + FROM current_relations cr + INNER JOIN current_relation_members crm ON crm.id=cr.id + WHERE crm.member_type='way' + AND crm.member_id IN (#{way_ids.join(',')}) + EOF + end + return ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] } + end - def coord2long(a) - (a-350)/$masterscale+$baselong - end + def sql_get_nodes_in_way(wayid) + points=[] + sql=<<-EOF + SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,current_nodes.id + FROM current_way_nodes,current_nodes + WHERE current_way_nodes.id=#{wayid.to_i} + AND current_way_nodes.node_id=current_nodes.id + AND current_nodes.visible=TRUE + ORDER BY sequence_id + EOF + ActiveRecord::Base.connection.select_all(sql).each do |row| + nodetags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_node_tags WHERE id=#{row['id']}").each do |n| + nodetags[n['k']]=n['v'] + end + nodetags.delete('created_by') + points << [row['lon'].to_f,row['lat'].to_f,row['id'].to_i,nodetags] + end + points + end - def y2lat(a) - 180/Math::PI * (2*Math.atan(Math.exp(a*Math::PI/180))-Math::PI/2) - end - + def sql_get_tags_in_way(wayid) + tags={} + ActiveRecord::Base.connection.select_all("SELECT k,v FROM current_way_tags WHERE id=#{wayid.to_i}").each do |row| + tags[row['k']]=row['v'] + end + tags + end + def sql_get_way_version(wayid) + ActiveRecord::Base.connection.select_one("SELECT version FROM current_ways WHERE id=#{wayid.to_i}") + end end +