943 lines
33 KiB
Ruby
943 lines
33 KiB
Ruby
# amf_controller is a semi-standalone API for Flash clients, particularly
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# Potlatch. All interaction between Potlatch (as a .SWF application) and the
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# OSM database takes place using this controller. Messages are
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# encoded in the Actionscript Message Format (AMF).
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#
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# Helper functions are in /lib/potlatch.rb
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#
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# Author:: editions Systeme D / Richard Fairhurst 2004-2008
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# Licence:: public domain.
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#
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# == General structure
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#
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# Apart from the amf_read and amf_write methods (which distribute the requests
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# from the AMF message), each method generally takes arguments in the order
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# they were sent by the Potlatch SWF. Do not assume typing has been preserved.
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# Methods all return an array to the SWF.
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#
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# == API 0.6
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#
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# Note that this requires a patched version of composite_primary_keys 1.1.0
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# (see http://groups.google.com/group/compositekeys/t/a00e7562b677e193)
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# if you are to run with POTLATCH_USE_SQL=false .
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#
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# == Debugging
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#
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# Any method that returns a status code (0 for ok) can also send:
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# return(-1,"message") <-- just puts up a dialogue
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# return(-2,"message") <-- also asks the user to e-mail me
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# return(-3,["type",v],id) <-- version conflict
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# return(-4,"type",id) <-- object not found
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# -5 indicates the method wasn't called (due to a previous error)
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#
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# To write to the Rails log, use logger.info("message").
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# Remaining issues:
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# * version conflict when POIs and ways are reverted
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class AmfController < ApplicationController
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require 'stringio'
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include Potlatch
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# Help methods for checking boundary sanity and area size
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include MapBoundary
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before_filter :check_api_writable
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# Main AMF handlers: process the raw AMF string (using AMF library) and
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# calls each action (private method) accordingly.
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# ** FIXME: refactor to reduce duplication of code across read/write
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def amf_read
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if request.post?
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req=StringIO.new(request.raw_post+0.chr)# Get POST data as request
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# (cf http://www.ruby-forum.com/topic/122163)
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req.read(2) # Skip version indicator and client ID
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results={} # Results of each body
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# Parse request
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headers=AMF.getint(req) # Read number of headers
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headers.times do # Read each header
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name=AMF.getstring(req) # |
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req.getc # | skip boolean
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value=AMF.getvalue(req) # |
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header["name"]=value # |
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end
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bodies=AMF.getint(req) # Read number of bodies
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bodies.times do # Read each body
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message=AMF.getstring(req) # | get message name
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index=AMF.getstring(req) # | get index in response sequence
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bytes=AMF.getlong(req) # | get total size in bytes
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args=AMF.getvalue(req) # | get response (probably an array)
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logger.info("Executing AMF #{message}(#{args.join(',')}):#{index}")
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case message
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when 'getpresets'; results[index]=AMF.putdata(index,getpresets(args[0]))
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when 'whichways'; results[index]=AMF.putdata(index,whichways(*args))
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when 'whichways_deleted'; results[index]=AMF.putdata(index,whichways_deleted(*args))
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when 'getway'; results[index]=AMF.putdata(index,getway(args[0].to_i))
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when 'getrelation'; results[index]=AMF.putdata(index,getrelation(args[0].to_i))
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when 'getway_old'; results[index]=AMF.putdata(index,getway_old(args[0].to_i,args[1]))
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when 'getway_history'; results[index]=AMF.putdata(index,getway_history(args[0].to_i))
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when 'getnode_history'; results[index]=AMF.putdata(index,getnode_history(args[0].to_i))
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when 'findgpx'; results[index]=AMF.putdata(index,findgpx(*args))
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when 'findrelations'; results[index]=AMF.putdata(index,findrelations(*args))
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when 'getpoi'; results[index]=AMF.putdata(index,getpoi(*args))
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end
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end
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logger.info("Encoding AMF results")
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sendresponse(results)
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else
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render :nothing => true, :status => :method_not_allowed
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end
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end
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def amf_write
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if request.post?
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req=StringIO.new(request.raw_post+0.chr)
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req.read(2)
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results={}
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renumberednodes={} # Shared across repeated putways
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renumberedways={} # Shared across repeated putways
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headers=AMF.getint(req) # Read number of headers
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headers.times do # Read each header
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name=AMF.getstring(req) # |
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req.getc # | skip boolean
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value=AMF.getvalue(req) # |
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header["name"]=value # |
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end
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bodies=AMF.getint(req) # Read number of bodies
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bodies.times do # Read each body
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message=AMF.getstring(req) # | get message name
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index=AMF.getstring(req) # | get index in response sequence
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bytes=AMF.getlong(req) # | get total size in bytes
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args=AMF.getvalue(req) # | get response (probably an array)
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err=false # Abort batch on error
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logger.info("Executing AMF #{message}:#{index}")
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if err
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results[index]=[-5,nil]
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else
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case message
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when 'putway'; orn=renumberednodes.dup
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r=putway(renumberednodes,*args)
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renumberednodes=r[4].dup
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r[4].delete_if { |k,v| orn.has_key?(k) }
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if r[2] != r[3] then renumberedways[r[2]] = r[3] end
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results[index]=AMF.putdata(index,r)
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when 'putrelation'; results[index]=AMF.putdata(index,putrelation(renumberednodes, renumberedways, *args))
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when 'deleteway'; results[index]=AMF.putdata(index,deleteway(*args))
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when 'putpoi'; r=putpoi(*args)
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if r[2] != r[3] then renumberednodes[r[2]] = r[3] end
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results[index]=AMF.putdata(index,r)
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when 'startchangeset'; results[index]=AMF.putdata(index,startchangeset(*args))
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end
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if results[index][0]==-3 then err=true end # If a conflict is detected, don't execute any more writes
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end
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end
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logger.info("Encoding AMF results")
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sendresponse(results)
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else
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render :nothing => true, :status => :method_not_allowed
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end
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end
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private
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def amf_handle_error(call)
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yield
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rescue OSM::APIVersionMismatchError => ex
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return [-3, [ex.type.downcase, ex.latest, ex.id]]
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rescue OSM::APIUserChangesetMismatchError => ex
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return [-2, ex.to_s]
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rescue OSM::APIBadBoundingBox => ex
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return [-2, "Sorry - I can't get the map for that area. The server said: #{ex.to_s}"]
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rescue OSM::APIError => ex
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return [-1, ex.to_s]
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rescue Exception => ex
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return [-2, "An unusual error happened (in #{call}). The server said: #{ex.to_s}"]
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end
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def amf_handle_error_with_timeout(call)
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amf_handle_error(call) do
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Timeout::timeout(APP_CONFIG['api_timeout'], OSM::APITimeoutError) do
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yield
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end
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end
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end
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# Start new changeset
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# Returns success_code,success_message,changeset id
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def startchangeset(usertoken, cstags, closeid, closecomment, opennew)
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amf_handle_error("'startchangeset'") do
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user = getuser(usertoken)
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if !user then return -1,"You are not logged in, so Potlatch can't write any changes to the database." end
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# close previous changeset and add comment
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if closeid
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cs = Changeset.find(closeid)
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cs.set_closed_time_now
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if cs.user_id!=user.id
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raise OSM::APIUserChangesetMismatchError.new
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elsif closecomment.empty?
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cs.save!
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else
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cs.tags['comment']=closecomment
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cs.save_with_tags!
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end
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end
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# open a new changeset
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if opennew!=0
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cs = Changeset.new
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cs.tags = cstags
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cs.user_id = user.id
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if !closecomment.empty? then cs.tags['comment']=closecomment end
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# smsm1 doesn't like the next two lines and thinks they need to be abstracted to the model more/better
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cs.created_at = Time.now.getutc
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cs.closed_at = cs.created_at + Changeset::IDLE_TIMEOUT
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cs.save_with_tags!
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return [0,'',cs.id]
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else
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return [0,'',nil]
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end
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end
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end
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# Return presets (default tags, localisation etc.):
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# uses POTLATCH_PRESETS global, set up in OSM::Potlatch.
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def getpresets(lang) #:doc:
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lang.gsub!(/[^\w\-]/,'')
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begin
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localised = YAML::load(File.open("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/localised.yaml"))
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rescue
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localised = "" # guess we'll just have to use the hardcoded English text instead
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end
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begin
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help = File.read("#{RAILS_ROOT}/config/potlatch/localised/#{lang}/help.html")
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rescue
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help = File.read("#{RAILS_ROOT}/config/potlatch/localised/en/help.html")
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end
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return POTLATCH_PRESETS+[localised,help]
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end
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##
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# Find all the ways, POI nodes (i.e. not part of ways), and relations
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# in a given bounding box. Nodes are returned in full; ways and relations
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# are IDs only.
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#
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# return is of the form:
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# [success_code, success_message,
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# [[way_id, way_version], ...],
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# [[node_id, lat, lon, [tags, ...], node_version], ...],
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# [[rel_id, rel_version], ...]]
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# where the ways are any visible ways which refer to any visible
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# nodes in the bbox, nodes are any visible nodes in the bbox but not
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# used in any way, rel is any relation which refers to either a way
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# or node that we're returning.
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def whichways(xmin, ymin, xmax, ymax) #:doc:
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amf_handle_error_with_timeout("'whichways'") do
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enlarge = [(xmax-xmin)/8,0.01].min
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xmin -= enlarge; ymin -= enlarge
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xmax += enlarge; ymax += enlarge
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# check boundary is sane and area within defined
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# see /config/application.yml
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check_boundaries(xmin, ymin, xmax, ymax)
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if POTLATCH_USE_SQL then
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ways = sql_find_ways_in_area(xmin, ymin, xmax, ymax)
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points = sql_find_pois_in_area(xmin, ymin, xmax, ymax)
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relations = sql_find_relations_in_area_and_ways(xmin, ymin, xmax, ymax, ways.collect {|x| x[0]})
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else
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# find the way ids in an area
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nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_nodes.visible = ?", true], :include => :ways)
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ways = nodes_in_area.inject([]) { |sum, node|
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visible_ways = node.ways.select { |w| w.visible? }
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sum + visible_ways.collect { |w| [w.id,w.version] }
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}.uniq
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ways.delete([])
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# find the node ids in an area that aren't part of ways
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nodes_not_used_in_area = nodes_in_area.select { |node| node.ways.empty? }
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points = nodes_not_used_in_area.collect { |n| [n.id, n.lon, n.lat, n.tags, n.version] }.uniq
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# find the relations used by those nodes and ways
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relations = Relation.find_for_nodes(nodes_in_area.collect { |n| n.id }, :conditions => {:visible => true}) +
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Relation.find_for_ways(ways.collect { |w| w[0] }, :conditions => {:visible => true})
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relations = relations.collect { |relation| [relation.id,relation.version] }.uniq
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end
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[0, '', ways, points, relations]
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end
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end
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# Find deleted ways in current bounding box (similar to whichways, but ways
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# with a deleted node only - not POIs or relations).
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def whichways_deleted(xmin, ymin, xmax, ymax) #:doc:
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amf_handle_error_with_timeout("'whichways_deleted'") do
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enlarge = [(xmax-xmin)/8,0.01].min
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xmin -= enlarge; ymin -= enlarge
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xmax += enlarge; ymax += enlarge
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# check boundary is sane and area within defined
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# see /config/application.yml
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check_boundaries(xmin, ymin, xmax, ymax)
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nodes_in_area = Node.find_by_area(ymin, xmin, ymax, xmax, :conditions => ["current_ways.visible = ?", false], :include => :ways_via_history)
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way_ids = nodes_in_area.collect { |node| node.ways_via_history_ids }.flatten.uniq
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[0,'',way_ids]
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end
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end
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# Get a way including nodes and tags.
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# Returns the way id, a Potlatch-style array of points, a hash of tags, and the version number.
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def getway(wayid) #:doc:
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amf_handle_error_with_timeout("'getway' #{wayid}") do
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if POTLATCH_USE_SQL then
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points = sql_get_nodes_in_way(wayid)
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tags = sql_get_tags_in_way(wayid)
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version = sql_get_way_version(wayid)
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else
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# Ideally we would do ":include => :nodes" here but if we do that
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# then rails only seems to return the first copy of a node when a
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# way includes a node more than once
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way = Way.find(:first, :conditions => { :id => wayid }, :include => { :nodes => :node_tags })
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# check case where way has been deleted or doesn't exist
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return [-4, 'way', wayid, [], {}, nil] if way.nil? or !way.visible
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points = way.nodes.collect do |node|
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nodetags=node.tags
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nodetags.delete('created_by')
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[node.lon, node.lat, node.id, nodetags, node.version]
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end
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tags = way.tags
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version = way.version
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end
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[0, '', wayid, points, tags, version]
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end
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end
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# Get an old version of a way, and all constituent nodes.
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#
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# For undelete (version<0), always uses the most recent version of each node,
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# even if it's moved. For revert (version >= 0), uses the node in existence
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# at the time, generating a new id if it's still visible and has been moved/
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# retagged.
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#
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# Returns:
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# 0. success code,
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# 1. id,
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# 2. array of points,
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# 3. hash of tags,
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# 4. version,
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# 5. is this the current, visible version? (boolean)
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def getway_old(id, timestamp) #:doc:
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amf_handle_error_with_timeout("'getway_old' #{id}, #{timestamp}") do
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if timestamp == ''
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# undelete
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old_way = OldWay.find(:first, :conditions => ['visible = ? AND id = ?', true, id], :order => 'version DESC')
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points = old_way.get_nodes_undelete unless old_way.nil?
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else
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begin
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# revert
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timestamp = DateTime.strptime(timestamp.to_s, "%d %b %Y, %H:%M:%S")
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old_way = OldWay.find(:first, :conditions => ['id = ? AND timestamp <= ?', id, timestamp], :order => 'timestamp DESC')
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unless old_way.nil?
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points = old_way.get_nodes_revert(timestamp)
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if !old_way.visible
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return [-1, "Sorry, the way was deleted at that time - please revert to a previous version.", id, [], {}, nil, false]
|
||
end
|
||
end
|
||
rescue ArgumentError
|
||
# thrown by date parsing method. leave old_way as nil for
|
||
# the error handler below.
|
||
end
|
||
end
|
||
|
||
if old_way.nil?
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||
return [-1, "Sorry, the server could not find a way at that time.", id, [], {}, nil, false]
|
||
else
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||
curway=Way.find(id)
|
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old_way.tags['history'] = "Retrieved from v#{old_way.version}"
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||
return [0, '', id, points, old_way.tags, curway.version, (curway.version==old_way.version and curway.visible)]
|
||
end
|
||
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|
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||
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| d<waycreated }
|
||
# Remove any elements where 2 seconds doesn't elapse before next one
|
||
revdates.delete_if { |d| revdates.include?(d+1) or revdates.include?(d+2) }
|
||
# Collect all in one nested array
|
||
revdates.collect! {|d| [d.strftime("%d %b %Y, %H:%M:%S")] + revusers[d.to_i] }
|
||
|
||
return ['way', wayid, revdates]
|
||
rescue ActiveRecord::RecordNotFound
|
||
return ['way', wayid, []]
|
||
end
|
||
end
|
||
|
||
# Find history of a node. Returns 'node', id, and an array of previous versions as above.
|
||
|
||
def getnode_history(nodeid) #:doc:
|
||
begin
|
||
history = Node.find(nodeid).old_nodes.reverse.collect do |old_node|
|
||
[old_node.timestamp.strftime("%d %b %Y, %H:%M:%S")] + change_user(old_node)
|
||
end
|
||
return ['node', nodeid, history]
|
||
rescue ActiveRecord::RecordNotFound
|
||
return ['node', nodeid, []]
|
||
end
|
||
end
|
||
|
||
def change_user(obj)
|
||
user_object = obj.changeset.user
|
||
user = user_object.data_public? ? user_object.display_name : 'anonymous'
|
||
uid = user_object.data_public? ? user_object.id : 0
|
||
[user,uid]
|
||
end
|
||
|
||
# Find GPS traces with specified name/id.
|
||
# Returns array listing GPXs, each one comprising id, name and description.
|
||
|
||
def findgpx(searchterm, usertoken)
|
||
amf_handle_error_with_timeout("'findgpx'") do
|
||
user = getuser(usertoken)
|
||
if !uid then return -1,"You must be logged in to search for GPX traces.",[] end
|
||
|
||
gpxs = []
|
||
if searchterm.to_i>0 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
|
||
[0,'',gpxs]
|
||
end
|
||
end
|
||
|
||
# Get a relation with all tags and members.
|
||
# Returns:
|
||
# 0. success code?
|
||
# 1. object type?
|
||
# 2. relation id,
|
||
# 3. hash of tags,
|
||
# 4. list of members,
|
||
# 5. version.
|
||
|
||
def getrelation(relid) #:doc:
|
||
amf_handle_error("'getrelation' #{relid}") do
|
||
rel = Relation.find(:first, :conditions => { :id => relid })
|
||
|
||
return [-4, 'relation', relid, {}, [], nil] if rel.nil? or !rel.visible
|
||
[0, '', relid, rel.tags, rel.members, rel.version]
|
||
end
|
||
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, rel.version])
|
||
end
|
||
else
|
||
RelationTag.find(:all, :limit => 11, :conditions => ["v like ?", "%#{searchterm}%"] ).each do |t|
|
||
if t.relation.visible then
|
||
rels.push([t.relation.id, t.relation.tags, t.relation.members, t.relation.version])
|
||
end
|
||
end
|
||
end
|
||
rels
|
||
end
|
||
|
||
# Save a relation.
|
||
# Returns
|
||
# 0. 0 (success),
|
||
# 1. original relation id (unchanged),
|
||
# 2. new relation id,
|
||
# 3. version.
|
||
|
||
def putrelation(renumberednodes, renumberedways, usertoken, changeset_id, version, relid, tags, members, visible) #:doc:
|
||
amf_handle_error("'putrelation' #{relid}") do
|
||
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 relid <= 0
|
||
# We're creating the relation
|
||
new_relation.create_with_history(user)
|
||
elsif visible
|
||
# We're updating the relation
|
||
new_relation.id = relid
|
||
relation.update_from(new_relation, user)
|
||
else
|
||
# We're deleting the relation
|
||
new_relation.id = relid
|
||
relation.delete_with_history!(new_relation, user)
|
||
end
|
||
end # transaction
|
||
|
||
if relid <= 0
|
||
return [0, '', relid, new_relation.id, new_relation.version]
|
||
else
|
||
return [0, '', relid, relid, relation.version]
|
||
end
|
||
end
|
||
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]),
|
||
# 8. hash of nodes to delete (id->version).
|
||
#
|
||
# 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, deletednodes) #:doc:
|
||
amf_handle_error("'putway' #{originalway}") do
|
||
# -- Initialise
|
||
|
||
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
|
||
|
||
# -- 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)
|
||
node.id=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
|
||
else
|
||
way = Way.find(originalway)
|
||
if way.tags!=attributes or way.nds!=pointlist or !way.visible?
|
||
new_way.id=originalway
|
||
way.update_from(new_way, user)
|
||
end
|
||
end
|
||
|
||
# -- Delete unwanted nodes
|
||
|
||
deletednodes.each do |id,v|
|
||
node = Node.find(id.to_i)
|
||
new_node = Node.new
|
||
new_node.changeset_id = changeset_id
|
||
new_node.version = v.to_i
|
||
new_node.id = id.to_i
|
||
begin
|
||
node.delete_with_history!(new_node, user)
|
||
rescue OSM::APIPreconditionFailedError => ex
|
||
# We don't do anything here as the node is being used elsewhere
|
||
# and we don't want to delete it
|
||
end
|
||
end
|
||
|
||
end # transaction
|
||
|
||
[0, '', originalway, way.id, renumberednodes, way.version, nodeversions, deletednodes]
|
||
end
|
||
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. success message,
|
||
# 2. original node id (unchanged),
|
||
# 3. new node id,
|
||
# 4. version.
|
||
|
||
def putpoi(usertoken, changeset_id, version, id, lon, lat, tags, visible) #:doc:
|
||
amf_handle_error("'putpoi' #{id}") do
|
||
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.",id,id,version 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
|
||
new_node.id=id
|
||
node.update_from(new_node, user)
|
||
else
|
||
# We're deleting the node
|
||
new_node.id=id
|
||
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
|
||
end
|
||
end
|
||
|
||
# Read POI from database
|
||
# (only called on revert: POIs are usually read by whichways).
|
||
#
|
||
# Returns array of id, long, lat, hash of tags, (current) version.
|
||
|
||
def getpoi(id,timestamp) #:doc:
|
||
amf_handle_error("'getpoi' #{id}") do
|
||
n = Node.find(id)
|
||
v = n.version
|
||
unless timestamp == ''
|
||
n = OldNode.find(id, :conditions=>['timestamp=?',DateTime.strptime(timestamp, "%d %b %Y, %H:%M:%S")])
|
||
end
|
||
|
||
if n
|
||
return [0, '', n.id, n.lon, n.lat, n.tags, v]
|
||
else
|
||
return [-4, 'node', id, nil, nil, {}, nil]
|
||
end
|
||
end
|
||
end
|
||
|
||
# Delete way and all constituent nodes.
|
||
# 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, new way version, new node versions.
|
||
|
||
def deleteway(usertoken, changeset_id, way_id, way_version, deletednodes) #:doc:
|
||
amf_handle_error("'deleteway' #{way_id}") do
|
||
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
|
||
nodeversions = {}
|
||
old_way=nil # returned, so scope it outside the transaction
|
||
# 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
|
||
delete_way.id = way_id
|
||
old_way.delete_with_history!(delete_way, user)
|
||
|
||
# -- Delete unwanted nodes
|
||
|
||
deletednodes.each do |id,v|
|
||
node = Node.find(id.to_i)
|
||
new_node = Node.new
|
||
new_node.changeset_id = changeset_id
|
||
new_node.version = v.to_i
|
||
new_node.id = id.to_i
|
||
begin
|
||
node.delete_with_history!(new_node, user)
|
||
nodeversions[node.id]=node.version
|
||
rescue OSM::APIPreconditionFailedError => ex
|
||
# We don't do anything with the exception as the node is in use
|
||
# elsewhere and we don't want to delete it
|
||
end
|
||
end
|
||
|
||
end # transaction
|
||
[0, '', way_id, old_way.version, nodeversions]
|
||
end
|
||
end
|
||
|
||
|
||
# ====================================================================
|
||
# Support functions
|
||
|
||
# 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 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 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
|
||
ActiveRecord::Base.connection.select_all(sql).collect { |a| [a['relid'].to_i,a['version'].to_i] }
|
||
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,current_nodes.version
|
||
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,row['version'].to_i]
|
||
end
|
||
points
|
||
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
|
||
|