169 lines
4.4 KiB
Ruby
169 lines
4.4 KiB
Ruby
# The ChangesetController is the RESTful interface to Changeset objects
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class ChangesetController < ApplicationController
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require 'xml/libxml'
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before_filter :authorize, :only => [:create, :update, :delete, :upload]
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before_filter :check_write_availability, :only => [:create, :update, :delete, :upload]
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before_filter :check_read_availability, :except => [:create, :update, :delete, :upload]
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after_filter :compress_output
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# Create a changeset from XML.
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def create
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if request.put?
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cs = Changeset.from_xml(request.raw_post, true)
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if cs
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cs.user_id = @user.id
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cs.save_with_tags!
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render :text => cs.id.to_s, :content_type => "text/plain"
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else
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render :nothing => true, :status => :bad_request
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end
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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 create_prim(ids, prim, nd)
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prim.version = 0
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prim.user_id = @user.id
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prim.visible = true
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prim.save_with_history!
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ids[nd['id'].to_i] = prim.id
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end
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def fix_way(w, node_ids)
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w.nds = w.instance_eval { @nds }.
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map { |nd| node_ids[nd] || nd }
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return w
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end
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def fix_rel(r, ids)
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r.members = r.instance_eval { @members }.
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map { |memb| [memb[0], ids[memb[0]][memb[1].to_i] || memb[1], memb[2]] }
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return r
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end
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def read
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begin
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changeset = Changeset.find(params[:id])
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render :text => changeset.to_xml.to_s, :content_type => "text/xml"
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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end
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end
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def close
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begin
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if not request.put?
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render :nothing => true, :status => :method_not_allowed
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return
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end
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changeset = Changeset.find(params[:id])
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changeset.open = false
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changeset.save
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render :nothing => true
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rescue ActiveRecord::RecordNotFound
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render :nothing => true, :status => :not_found
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end
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end
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def upload
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if not request.put?
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render :nothing => true, :status => :method_not_allowed
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return
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end
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p = XML::Reader.new request.raw_post
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node_ids, way_ids, rel_ids = {}, {}, {}
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ids = {"node"=>node_ids, "way"=>way_ids, "relation"=>rel_ids}
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models = {"node"=>Node, "way"=>Way, "relation"=>Relation}
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res = XML::Document.new
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res.encoding = 'UTF-8'
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root = XML::Node.new 'osm'
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root['version'] = '0.6'
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root['creator'] = 'OpenStreetMap.org'
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res.root = root
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root << XML::Node.new_comment(" Warning: this is a 0.6 result document, " +
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"not a normal OSM file. ")
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Changeset.transaction do
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while p.read == 1
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break if p.node_type == 15 # end element
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next unless p.node_type == 1 # element
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case p.name
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when 'create':
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while p.read == 1
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break if p.node_type == 15 # end element
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next unless p.node_type == 1 # element
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model = models[p.name]
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next if model.nil?
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elem = XML::Node.new p.name
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nd = p.expand; p.next
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osm = model.from_xml_node(nd, true)
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elem['old_id'] = nd['id']
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case nd.name
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when 'way':
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fix_way(osm, node_ids)
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raise OSM::APIPreconditionFailedError.new if !osm.preconditions_ok?
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when 'relation':
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fix_rel(osm, ids)
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raise OSM::APIPreconditionFailedError.new if !osm.preconditions_ok?
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end
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create_prim ids[nd.name], osm, nd
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elem['new_id'] = osm.id.to_s
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elem['new_version'] = osm.version.to_s
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root << elem
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end
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when 'modify':
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while p.read == 1
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break if p.node_type == 15 # end element
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next unless p.node_type == 1 # element
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model = models[p.name]
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next if model.nil?
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elem = XML::Node.new p.name
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new_osm = model.from_xml_node(p.expand); p.next
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osm = model.find(new_osm.id)
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osm.update_from new_osm, @user
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elem['old_id'] = elem['new_id'] = osm.id.to_s
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elem['new_version'] = osm.version.to_s
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root << elem
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end
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when 'delete':
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while p.read == 1
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break if p.node_type == 15 # end element
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next unless p.node_type == 1 # element
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model = models[p.name]
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next if model.nil?
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elem = XML::Node.new p.name
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osm = model.find(p.expand['id']); p.next
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osm.delete_with_history(@user)
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elem['old_id'] = elem['new_id'] = osm.id.to_s
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elem['new_version'] = osm.version.to_s
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root << elem
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end
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end
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end
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end
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render :text => res.to_s, :content_type => "text/xml"
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rescue OSM::APIError => ex
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render ex.render_opts
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end
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end
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