Refactor generation of object metadata in API calls

[rails.git] / app / controllers / node_controller.rb

diff --git a/app/controllers/node_controller.rb b/app/controllers/node_controller.rb
index c27081650a692375575940c9ea90804ae1b40fcd..1e34bc10d507c5cec1874137dd7c13fe5431a718 100644 (file)
--- a/app/controllers/node_controller.rb
+++ b/app/controllers/node_controller.rb
@@ -1,325 +1,84 @@
+# The NodeController is the RESTful interface to Node objects
+

 class NodeController < ApplicationController
   require 'xml/libxml'
 class NodeController < ApplicationController
   require 'xml/libxml'

-  
-  before_filter :authorize
-
-  def create
-    if request.put?
-      doc = XML::Document.new(request.raw_post) #THIS IS BROKEN, libxml docus dont talk about creating a doc from a string
-      doc.find('//osm/node').each do |pt|
-        render :text => 'arghsd.rkugt;dsrt'
-        return
-        lat = pt.attributes['lat'].to_f
-        lon = pt.attributes['lon'].to_f
-        node_id = pt.attributes['id'].to_i

 
 

-        if lat > 90 or lat < -90 or lon > 180 or lon < -180  or node_id != 0
-          render :nothing => true, :status => 400 # BAD REQUEST
-          return
-        end
+  skip_before_filter :verify_authenticity_token
+  before_filter :authorize, :only => [:create, :update, :delete]
+  before_filter :require_allow_write_api, :only => [:create, :update, :delete]
+  before_filter :require_public_data, :only => [:create, :update, :delete]
+  before_filter :check_api_writable, :only => [:create, :update, :delete]
+  before_filter :check_api_readable, :except => [:create, :update, :delete]
+  after_filter :compress_output
+  around_filter :api_call_handle_error, :api_call_timeout

 
 

-        tags = []
+  # Create a node from XML.
+  def create
+    assert_method :put

 
 

-        pt.elements.each('tag') do |tag|
-          tags << [tag.attributes['k'],tag.attributes['v']]
-        end
-        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
-        tags = '' if tags.nil?
+    node = Node.from_xml(request.raw_post, true)

 
 

-        now = Time.now
+    # Assume that Node.from_xml has thrown an exception if there is an error parsing the xml
+    node.create_with_history @user
+    render :text => node.id.to_s, :content_type => "text/plain"
+  end

 
 

-        node = Node.new
-        node.latitude = lat
-        node.longitude = lon
-        node.visible = 1
-        node.tags = tags
-        node.timestamp = now
-        node.user_id = @user.id
+  # Dump the details on a node given in params[:id]
+  def read
+    node = Node.find(params[:id])

 
 

-        #FIXME add a node to the old nodes table too
+    response.last_modified = node.timestamp

 
 

-        if node.save
-          render :text => node.id
-        else
-          render :nothing => true, :status => 500
-        end
-      end
+    if node.visible
+      render :text => node.to_xml.to_s, :content_type => "text/xml"
+    else
+      render :text => "", :status => :gone

     end
     end

-
-        render :text => 'WRONG!           '
-        return
-

   end
   end

-
-  def rest
-    unless Node.exists?(params[:id])
-      render :nothing => true, :status => 400
-      return
-    end
-
+  
+  # Update a node from given XML
+  def update

     node = Node.find(params[:id])
     node = Node.find(params[:id])

-
-
-    case request.method
-    when :get
-      doc = XML::Document.new
-
-      # this needs a new libxml:
-      # doc.encoding = "UTF-8"  
-
-      root = XML::Node.new 'osm'
-      root['version'] = '0.4'
-      root['generator'] = 'OpenStreetMap server'
-      doc.root = root
-      el1 = XML::Node.new 'node'
-      el1['id'] = node.id.to_s
-      el1['lat'] = node.latitude.to_s
-      el1['lon'] = node.longitude.to_s
-      split_tags(el1, node.tags)
-      el1['visible'] = node.visible.to_s
-      el1['timestamp'] = node.timestamp.xmlschema
-      root << el1
-
-      render :text => doc.to_s
-
-      #
-      # DELETE
-      #
-    when :delete
-
-      if node.visible
-        node.visible = 0
-        node.save
-      else
-        render :nothing => true, :status => 410
-      end
-
-      #
-      # PUT
-      #
-    when :put
-
-      doc = XML::Document.new(request.raw_post)
-      doc.elements.each('osm/node') do |pt|
-        lat = pt.attributes['lat'].to_f
-        lon = pt.attributes['lon'].to_f
-        node_id = pt.attributes['id'].to_i
-
-        if lat > 90 or lat < -90 or lon > 180 or lon < -180  or node_id != params[:id]
-          render :nothing => true, :status => 400 # BAD REQUEST
-          return
-        end
-
-        tags = []
-
-        pt.elements.each('tag') do |tag|
-          tags << [tag.attributes['k'],tag.attributes['v']]
-        end
-        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
-        tags = '' if tags.nil?
-
-        now = Time.now
-
-        node.latitude = lat
-        node.longitude = lon
-        node.visible = 1
-        node.tags = tags
-        node.timestamp = now
-        node.user_id = @user.id
-
-        #FIXME add a node to the old nodes table too
-
-        if node.save
-          render :text => node.id
-        else
-          render :nothing => true, :status => 500
-        end
-      end
+    new_node = Node.from_xml(request.raw_post)
+       
+    unless new_node and new_node.id == node.id
+      raise OSM::APIBadUserInput.new("The id in the url (#{node.id}) is not the same as provided in the xml (#{new_node.id})")

     end
     end

+    node.update_from(new_node, @user)
+    render :text => node.version.to_s, :content_type => "text/plain"

   end
 
   end
 

-
-  def dummy
-    if request.post?
-      userid = dao.useridfromcreds(r.user, r.get_basic_auth_pw)
-      doc = Document.new $stdin.read
-
-      doc.elements.each('osm/node') do |pt|
-        lat = pt.attributes['lat'].to_f
-        lon = pt.attributes['lon'].to_f
-        xmlnodeid = pt.attributes['id'].to_i
-
-        tags = []
-        pt.elements.each('tag') do |tag|
-          tags << [tag.attributes['k'],tag.attributes['v']]
-        end
-
-        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
-
-        tags = '' unless tags
-        if xmlnodeid == nodeid && userid != 0
-          if nodeid == 0
-            new_node_id = dao.create_node(lat, lon, userid, tags)
-            if new_node_id
-              puts new_node_id
-              exit
-            else
-              exit HTTP_INTERNAL_SERVER_ERROR
-            end
-          else
-            node = dao.getnode(nodeid)
-            if node
-              #FIXME: need to check the node hasn't moved too much
-              if dao.update_node?(nodeid, userid, lat, lon, tags)
-                exit
-              else
-                exit HTTP_INTERNAL_SERVER_ERROR
-              end
-            else
-              exit HTTP_NOT_FOUND
-            end
-          end
-
-        else
-          exit BAD_REQUEST
-        end
-      end
-      exit HTTP_INTERNAL_SERVER_ERROR
-
-
+  # Delete a node. Doesn't actually delete it, but retains its history 
+  # in a wiki-like way. We therefore treat it like an update, so the delete
+  # method returns the new version number.
+  def delete
+    node = Node.find(params[:id])
+    new_node = Node.from_xml(request.raw_post)
+    
+    unless new_node and new_node.id == node.id
+      raise OSM::APIBadUserInput.new("The id in the url (#{node.id}) is not the same as provided in the xml (#{new_node.id})")

     end
     end

+    node.delete_with_history!(new_node, @user)
+    render :text => node.version.to_s, :content_type => "text/plain"

   end
 
   end
 

-
-  def dummydummy
-
-    #
-    # POST ???
-    #
-
-    if request.post?
-      nodeid = r.args.match(/nodeid=([0-9]+)/).captures.first.to_i
-      userid = dao.useridfromcreds(r.user, r.get_basic_auth_pw)
-      doc = Document.new $stdin.read
-
-      doc.elements.each('osm/node') do |pt|
-        lat = pt.attributes['lat'].to_f
-        lon = pt.attributes['lon'].to_f
-        xmlnodeid = pt.attributes['id'].to_i
-
-        tags = []
-        pt.elements.each('tag') do |tag|
-          tags << [tag.attributes['k'],tag.attributes['v']]
-        end
-
-        tags = tags.collect { |k,v| "#{k}=#{v}" }.join(';')
-
-        tags = '' unless tags
-        if xmlnodeid == nodeid && userid != 0
-          if nodeid == 0
-            new_node_id = dao.create_node(lat, lon, userid, tags)
-            if new_node_id
-              puts new_node_id
-              exit
-            else
-              exit HTTP_INTERNAL_SERVER_ERROR
-            end
-          else
-            node = dao.getnode(nodeid)
-            if node
-              #FIXME: need to check the node hasn't moved too much
-              if dao.update_node?(nodeid, userid, lat, lon, tags)
-                exit
-              else
-                exit HTTP_INTERNAL_SERVER_ERROR
-              end
-            else
-              exit HTTP_NOT_FOUND
-            end
-          end
-
-        else
-          exit BAD_REQUEST
-        end
-      end
-      exit HTTP_INTERNAL_SERVER_ERROR
-
+  # Dump the details on many nodes whose ids are given in the "nodes" parameter.
+  def nodes
+    if not params['nodes']
+      raise OSM::APIBadUserInput.new("The parameter nodes is required, and must be of the form nodes=id[,id[,id...]]")

     end
 
     end
 

-    #
-    # GET ???
-    #
-
-    if request.get?
-      node = node.find(params[:id])
-      doc = document.new
-      doc.encoding = "utf-8"
-      root = node.new 'osm'
-      root['version'] = '0.4'
-      root['generator'] = 'openstreetmap server'
-      doc.root = root
-      el1 = node.new 'node'
-      el1['id'] = node.id.to_s
-      el1['lat'] = node.latitude.to_s
-      el1['lon'] = node.longitude.to_s
-      split_tags(el1, node.tags)
-      el1['visible'] = node.visible.to_s
-      el1['timestamp'] = node.timestamp
-      root << el1
+    ids = params['nodes'].split(',').collect { |n| n.to_i }

 
 

-      render :text => doc.to_s, :template => false
+    if ids.length == 0
+      raise OSM::APIBadUserInput.new("No nodes were given to search for")

     end
     end

+    doc = OSM::API.new.get_xml_doc

 
 

-    #
-    # DELETE????
-    # 
-
-    if request.delete?
-      userid = dao.useridfromcreds(r.user, r.get_basic_auth_pw)
-      #cgi doesnt work with DELETE so extract manually:
-      nodeid = r.args.match(/nodeid=([0-9]+)/).captures.first.to_i
-
-      if userid > 0 && nodeid != 0
-        node = dao.getnode(nodeid)
-        if node
-          if node.visible  
-            if dao.delete_node?(nodeid, userid)
-              exit
-            else
-              exit HTTP_INTERNAL_SERVER_ERROR
-            end
-          else
-            exit HTTP_GONE
-          end
-        else
-          exit HTTP_NOT_FOUND
-        end
-      else
-        exit BAD_REQUEST
-
-      end
-
-
+    Node.find(ids).each do |node|
+      doc.root << node.to_xml_node

     end
 
     end
 

-
+    render :text => doc.to_s, :content_type => "text/xml"

   end
   end

-
-  private
-  def split_tags(el, tags)
-    tags.split(';').each do |tag|
-      parts = tag.split('=')
-      key = ''
-      val = ''
-      key = parts[0].strip unless parts[0].nil?
-      val = parts[1].strip unless parts[1].nil?
-      if key != '' && val != ''
-        el2 = Node.new('tag')
-        el2['k'] = key.to_s
-        el2['v'] = val.to_s
-        el << el2
-      end
-    end
-  end
-

 end
 end