api06: simplify exception handling and add exception handling to the diff

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

diff --git a/app/controllers/way_controller.rb b/app/controllers/way_controller.rb
index 49a3b3bfec3d7de50266e9dce7dbc29b1a67c40a..cf1634fa55699cccdae1084536256c3f7c5fc4bd 100644 (file)
--- a/app/controllers/way_controller.rb
+++ b/app/controllers/way_controller.rb
@@ -1,58 +1,138 @@
 class WayController < ApplicationController
   require 'xml/libxml'
 
-  before_filter :authorize
+  session :off
+  before_filter :authorize, :only => [:create, :update, :delete]
+  before_filter :check_write_availability, :only => [:create, :update, :delete]
+  before_filter :check_read_availability, :except => [:create, :update, :delete]
+  after_filter :compress_output
 
   def create
     if request.put?
       way = Way.from_xml(request.raw_post, true)
 
       if way
-        way.user_id = @user.id
-        if way.save_with_history
-
-
-          render :text => way.id
+        if !way.preconditions_ok?
+          render :text => "", :status => :precondition_failed
         else
-          render :nothing => true, :status => 500
+          way.version = 0
+          way.user_id = @user.id
+          way.save_with_history!
+
+          render :text => way.id.to_s, :content_type => "text/plain"
         end
-        return
       else
-        render :nothing => true, :status => 400 # if we got here the doc didnt parse
-        return
+        render :nothing => true, :status => :bad_request
       end
+    else
+      render :nothing => true, :status => :method_not_allowed
     end
-
-    render :nothing => true, :status => 500 # something went very wrong
   end
 
-  def rest
-    unless Way.exists?(params[:id])
-      render :nothing => true, :status => 404
-      return
+  def read
+    begin
+      way = Way.find(params[:id])
+
+      response.headers['Last-Modified'] = way.timestamp.rfc822
+
+      if way.visible
+        render :text => way.to_xml.to_s, :content_type => "text/xml"
+      else
+        render :text => "", :status => :gone
+      end
+    rescue OSM::APIError => ex
+      render ex.render_opts
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
     end
+  end
 
-    way = Way.find(params[:id])
-    case request.method
-   
-    when :get
-      unless way.visible
-        render :nothing => true, :status => 410
-        return
+  def update
+    begin
+      way = Way.find(params[:id])
+      new_way = Way.from_xml(request.raw_post)
+
+      if new_way and new_way.id == way.id
+        way.update_from(new_way, @user)
+        render :text => way.version.to_s, :content_type => "text/plain"
+      else
+        render :nothing => true, :status => :bad_request
       end
-      render :text => way.to_xml.to_s
+    rescue OSM::APIError => ex
+      render ex.render_opts
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
+
+  # This is the API call to delete a way
+  def delete
+    begin
+      way = Way.find(params[:id])
+      way.delete_with_history(@user)
+
+      # if we get here, all is fine, otherwise something will catch below.  
+      render :nothing => true
+    rescue OSM::APIError => ex
+      render ex.render_opts
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
 
-    when :delete
-      unless way.visible
-        render :nothing => true, :status => 410
-        return
+  def full
+    begin
+      way = Way.find(params[:id])
+
+      if way.visible
+        nd_ids = way.nds + [-1]
+        nodes = Node.find(:all, :conditions => "visible = 1 AND id IN (#{nd_ids.join(',')})")
+
+        # Render
+        doc = OSM::API.new.get_xml_doc
+        nodes.each do |node|
+          doc.root << node.to_xml_node()
+        end
+        doc.root << way.to_xml_node()
+
+        render :text => doc.to_s, :content_type => "text/xml"
+      else
+        render :text => "", :status => :gone
       end
+    rescue ActiveRecord::RecordNotFound
+      render :nothing => true, :status => :not_found
+    end
+  end
+
+  def ways
+    begin
+      ids = params['ways'].split(',').collect { |w| w.to_i }
+    rescue
+      ids = []
+    end
+
+    if ids.length > 0
+      doc = OSM::API.new.get_xml_doc
 
-      way.visible = false
-      way.save_with_history
+      Way.find(ids).each do |way|
+        doc.root << way.to_xml_node
+      end
 
+      render :text => doc.to_s, :content_type => "text/xml"
+    else
+      render :nothing => true, :status => :bad_request
     end
- 
   end
 
+  def ways_for_node
+    wayids = WayNode.find(:all, :conditions => ['node_id = ?', params[:id]]).collect { |ws| ws.id[0] }.uniq
+
+    doc = OSM::API.new.get_xml_doc
+
+    Way.find(wayids).each do |way|
+      doc.root << way.to_xml_node
+    end
+
+    render :text => doc.to_s, :content_type => "text/xml"
+  end
 end