From: Tom Hughes <tom@compton.nu>
Date: Mon, 11 Oct 2010 22:09:27 +0000 (+0100)
Subject: Make trace API a proper CRUD API like other object types
X-Git-Tag: live~6804^2~3
X-Git-Url: https://git.openstreetmap.org./rails.git/commitdiff_plain/71f1554212620cd0078bb04b0e666e0cbf4eb95c

Make trace API a proper CRUD API like other object types
---

diff --git a/app/controllers/trace_controller.rb b/app/controllers/trace_controller.rb
index 989d5d5a0..2cd3117dd 100644
--- a/app/controllers/trace_controller.rb
+++ b/app/controllers/trace_controller.rb
@@ -4,22 +4,22 @@ class TraceController < ApplicationController
   before_filter :authorize_web
   before_filter :set_locale
   before_filter :require_user, :only => [:mine, :create, :edit, :delete]
-  before_filter :authorize, :only => [:api_details, :api_data, :api_create]
-  before_filter :check_database_readable, :except => [:api_details, :api_data, :api_create]
-  before_filter :check_database_writable, :only => [:create, :edit, :delete]
-  before_filter :check_api_readable, :only => [:api_details, :api_data]
-  before_filter :check_api_writable, :only => [:api_create]
-  before_filter :require_allow_read_gpx, :only => [:api_details, :api_data]
-  before_filter :require_allow_write_gpx, :only => [:api_create]
+  before_filter :authorize, :only => [:api_create, :api_read, :api_update, :api_delete, :api_data]
+  before_filter :check_database_readable, :except => [:api_read, :api_data]
+  before_filter :check_database_writable, :only => [:create, :edit, :delete, :api_create, :api_update, :api_delete]
+  before_filter :check_api_readable, :only => [:api_read, :api_data]
+  before_filter :check_api_writable, :only => [:api_create, :api_update, :api_delete]
+  before_filter :require_allow_read_gpx, :only => [:api_read, :api_data]
+  before_filter :require_allow_write_gpx, :only => [:api_create, :api_update, :api_delete]
   before_filter :offline_warning, :only => [:mine, :view]
-  before_filter :offline_redirect, :only => [:create, :edit, :delete, :data, :api_data, :api_create]
-  around_filter :api_call_handle_error, :only => [:api_details, :api_data, :api_create]
+  before_filter :offline_redirect, :only => [:create, :edit, :delete, :data, :api_create, :api_delete, :api_data]
+  around_filter :api_call_handle_error, :only => [:api_create, :api_read, :api_update, :api_delete, :api_data]
 
   caches_action :list, :unless => :logged_in?, :layout => false
   caches_action :view, :layout => false
   caches_action :georss, :layout => true
-  cache_sweeper :trace_sweeper, :only => [:create, :edit, :delete, :api_create], :unless => STATUS == :database_offline
-  cache_sweeper :tracetag_sweeper, :only => [:create, :edit, :delete, :api_create], :unless => STATUS == :database_offline
+  cache_sweeper :trace_sweeper, :only => [:create, :edit, :delete, :api_create, :api_update, :api_delete], :unless => STATUS == :database_offline
+  cache_sweeper :tracetag_sweeper, :only => [:create, :edit, :delete, :api_create, :api_update, :api_delete], :unless => STATUS == :database_offline
 
   # Counts and selects pages of GPX traces for various criteria (by user, tags, public etc.).
   #  target_user - if set, specifies the user to fetch traces for.  if not set will fetch all traces
@@ -280,16 +280,48 @@ class TraceController < ApplicationController
     render :nothing => true, :status => :not_found
   end
 
-  def api_details
-    trace = Trace.find(params[:id])
+  def api_read
+    trace = Trace.find(params[:id], :conditions => { :visible => true })
 
     if trace.public? or trace.user == @user
       render :text => trace.to_xml.to_s, :content_type => "text/xml"
     else
       render :nothing => true, :status => :forbidden
     end
-  rescue ActiveRecord::RecordNotFound
-    render :nothing => true, :status => :not_found
+  end
+
+  def api_update
+    trace = Trace.find(params[:id], :conditions => { :visible => true })
+
+    if trace.user == @user
+      new_trace = Trace.from_xml(request.raw_post)
+
+      unless new_trace and new_trace.id == trace.id
+        raise OSM::APIBadUserInput.new("The id in the url (#{trace.id}) is not the same as provided in the xml (#{new_trace.id})")
+      end
+
+      trace.description = new_trace.description
+      trace.tags = new_trace.tags
+      trace.visibility = new_trace.visibility
+      trace.save!
+
+      render :nothing => true, :status => :ok
+    else
+      render :nothing => true, :status => :forbidden
+    end
+  end
+
+  def api_delete
+    trace = Trace.find(params[:id], :conditions => { :visible => true })
+
+    if trace.user == @user
+      trace.visible = false
+      trace.save!
+
+      render :nothing => true, :status => :ok
+    else
+      render :nothing => true, :status => :forbidden
+    end
   end
 
   def api_data
@@ -304,8 +336,6 @@ class TraceController < ApplicationController
     else
       render :nothing => true, :status => :forbidden
     end
-  rescue ActiveRecord::RecordNotFound
-    render :nothing => true, :status => :not_found
   end
 
   def api_create
diff --git a/app/models/trace.rb b/app/models/trace.rb
index 39ecb416a..582c7285c 100644
--- a/app/models/trace.rb
+++ b/app/models/trace.rb
@@ -169,6 +169,52 @@ class Trace < ActiveRecord::Base
     return el1
   end
 
+  # Read in xml as text and return it's Node object representation
+  def self.from_xml(xml, create=false)
+    begin
+      p = XML::Parser.string(xml)
+      doc = p.parse
+
+      doc.find('//osm/gpx_file').each do |pt|
+        return Trace.from_xml_node(pt, create)
+      end
+
+      raise OSM::APIBadXMLError.new("trace", xml, "XML doesn't contain an osm/gpx_file element.")
+    rescue LibXML::XML::Error, ArgumentError => ex
+      raise OSM::APIBadXMLError.new("trace", xml, ex.message)
+    end
+  end
+
+  def self.from_xml_node(pt, create=false)
+    trace = Trace.new
+    
+    raise OSM::APIBadXMLError.new("trace", pt, "visibility missing") if pt['visibility'].nil?
+    trace.visibility = pt['visibility']
+
+    unless create
+      raise OSM::APIBadXMLError.new("trace", pt, "ID is required when updating.") if pt['id'].nil?
+      trace.id = pt['id'].to_i
+      # .to_i will return 0 if there is no number that can be parsed. 
+      # We want to make sure that there is no id with zero anyway
+      raise OSM::APIBadUserInput.new("ID of trace cannot be zero when updating.") if trace.id == 0
+    end
+
+    # We don't care about the time, as it is explicitly set on create/update/delete
+    # We don't care about the visibility as it is implicit based on the action
+    # and set manually before the actual delete
+    trace.visible = true
+
+    description = pt.find('description').first
+    raise OSM::APIBadXMLError.new("trace", pt, "description missing") if description.nil?
+    trace.description = description.content
+
+    pt.find('tag').each do |tag|
+      trace.tags.build(:tag => tag.content)
+    end
+
+    return trace
+  end
+
   def xml_file
     # TODO *nix specific, could do to work on windows... would be functionally inferior though - check for '.gz'
     filetype = `/usr/bin/file -bz #{trace_name}`.chomp
diff --git a/config/routes.rb b/config/routes.rb
index 825413ff3..56a59a207 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -62,9 +62,12 @@ ActionController::Routing::Routes.draw do |map|
   map.connect "api/#{API_VERSION}/user/gpx_files", :controller => 'user', :action => 'api_gpx_files'
  
   map.connect "api/#{API_VERSION}/gpx/create", :controller => 'trace', :action => 'api_create'
-  map.connect "api/#{API_VERSION}/gpx/:id/details", :controller => 'trace', :action => 'api_details'
-  map.connect "api/#{API_VERSION}/gpx/:id/data", :controller => 'trace', :action => 'api_data'
-  map.connect "api/#{API_VERSION}/gpx/:id/data.:format", :controller => 'trace', :action => 'api_data'
+  map.connect "api/#{API_VERSION}/gpx/:id", :controller => 'trace', :action => 'api_read', :id => /\d+/, :conditions => { :method => :get }
+  map.connect "api/#{API_VERSION}/gpx/:id", :controller => 'trace', :action => 'api_update', :id => /\d+/, :conditions => { :method => :put }
+  map.connect "api/#{API_VERSION}/gpx/:id", :controller => 'trace', :action => 'api_delete', :id => /\d+/, :conditions => { :method => :delete }
+  map.connect "api/#{API_VERSION}/gpx/:id/details", :controller => 'trace', :action => 'api_read', :id => /\d+/
+  map.connect "api/#{API_VERSION}/gpx/:id/data", :controller => 'trace', :action => 'api_data', :id => /\d+/
+  map.connect "api/#{API_VERSION}/gpx/:id/data.:format", :controller => 'trace', :action => 'api_data', :id => /\d+/
   
   # AMF (ActionScript) API
   
diff --git a/test/fixtures/gpx_files.yml b/test/fixtures/gpx_files.yml
index 08616bd99..6e082d24d 100644
--- a/test/fixtures/gpx_files.yml
+++ b/test/fixtures/gpx_files.yml
@@ -14,7 +14,7 @@ public_trace_file:
 anon_trace_file:
   id: 2
   user_id: 2
-  visible: false
+  visible: true
   name: Private Trace.gpx
   size: 123
   latitude: 51.3
@@ -27,7 +27,7 @@ anon_trace_file:
 trackable_trace_file:
   id: 3
   user_id: 2
-  visible: false
+  visible: true
   name: Trackable Trace.gpx
   size: 123
   latitude: 51.51
@@ -40,7 +40,7 @@ trackable_trace_file:
 identifiable_trace_file:
   id: 4
   user_id: 2
-  visible: false
+  visible: true
   name: Identifiable Trace.gpx
   size: 123
   latitude: 51.512
@@ -49,3 +49,16 @@ identifiable_trace_file:
   visibility: "identifiable"
   description: This trace shows trksegs, timestamps and user details.
   inserted: true
+
+deleted_trace_file:
+  id: 5
+  user_id: 2
+  visible: false
+  name: Deleted Trace.gpx
+  size: 123
+  latitude: 51.512
+  longitude: 0.142
+  timestamp: "2009-07-30 17:48:34"
+  visibility: "public"
+  description: This is a trace that has been deleted.
+  inserted: true
diff --git a/test/functional/trace_controller_test.rb b/test/functional/trace_controller_test.rb
index eb8e675b0..812143c81 100644
--- a/test/functional/trace_controller_test.rb
+++ b/test/functional/trace_controller_test.rb
@@ -4,7 +4,6 @@ class TraceControllerTest < ActionController::TestCase
   fixtures :users, :gpx_files
   set_fixture_class :gpx_files => 'Trace'
 
-
   # Check that the list of changesets is displayed
   def test_list
     get :list
@@ -39,48 +38,125 @@ class TraceControllerTest < ActionController::TestCase
   end
 
   # Check getting a specific trace through the api
-  def test_api_details
+  def test_api_read
     # First with no auth
-    get :api_details, :id => gpx_files(:public_trace_file).id
+    get :api_read, :id => gpx_files(:public_trace_file).id
     assert_response :unauthorized
 
     # Now with some other user, which should work since the trace is public
     basic_authorization(users(:public_user).display_name, "test")
-    get :api_details, :id => gpx_files(:public_trace_file).id
+    get :api_read, :id => gpx_files(:public_trace_file).id
     assert_response :success
 
     # And finally we should be able to do it with the owner of the trace
     basic_authorization(users(:normal_user).display_name, "test")
-    get :api_details, :id => gpx_files(:public_trace_file).id
+    get :api_read, :id => gpx_files(:public_trace_file).id
     assert_response :success
   end
 
   # Check an anoymous trace can't be specifically fetched by another user
-  def test_api_details_anon
+  def test_api_read_anon
     # Furst with no auth
-    get :api_details, :id => gpx_files(:anon_trace_file).id
+    get :api_read, :id => gpx_files(:anon_trace_file).id
     assert_response :unauthorized
 
     # Now try with another user, which shouldn't work since the trace is anon
     basic_authorization(users(:normal_user).display_name, "test")
-    get :api_details, :id => gpx_files(:anon_trace_file).id
+    get :api_read, :id => gpx_files(:anon_trace_file).id
     assert_response :forbidden
 
     # And finally we should be able to get the trace details with the trace owner
     basic_authorization(users(:public_user).display_name, "test")
-    get :api_details, :id => gpx_files(:anon_trace_file).id
+    get :api_read, :id => gpx_files(:anon_trace_file).id
     assert_response :success
   end
 
   # Check the api details for a trace that doesn't exist
-  def test_api_details_not_found
+  def test_api_read_not_found
     # Try first with no auth, as it should requure it
-    get :api_details, :id => 0
+    get :api_read, :id => 0
     assert_response :unauthorized
 
     # Login, and try again
     basic_authorization(users(:public_user).display_name, "test")
-    get :api_details, :id => 0
+    get :api_read, :id => 0
+    assert_response :not_found
+
+    # Now try a trace which did exist but has been deleted
+    basic_authorization(users(:public_user).display_name, "test")
+    get :api_read, :id => 5
+    assert_response :not_found
+  end
+
+  # Check updating a trace through the api
+  def test_api_update
+    # First with no auth
+    content gpx_files(:public_trace_file).to_xml
+    put :api_update, :id => gpx_files(:public_trace_file).id
+    assert_response :unauthorized
+
+    # Now with some other user, which should fail
+    basic_authorization(users(:public_user).display_name, "test")
+    content gpx_files(:public_trace_file).to_xml
+    put :api_update, :id => gpx_files(:public_trace_file).id
+    assert_response :forbidden
+
+    # Now with a trace which doesn't exist
+    basic_authorization(users(:public_user).display_name, "test")
+    content gpx_files(:public_trace_file).to_xml
+    put :api_update, :id => 0
+    assert_response :not_found
+
+    # Now with a trace which did exist but has been deleted
+    basic_authorization(users(:public_user).display_name, "test")
+    content gpx_files(:deleted_trace_file).to_xml
+    put :api_update, :id => gpx_files(:deleted_trace_file).id
+    assert_response :not_found
+
+    # Now try an update with the wrong ID
+    basic_authorization(users(:normal_user).display_name, "test")
+    content gpx_files(:anon_trace_file).to_xml
+    put :api_update, :id => gpx_files(:public_trace_file).id
+    assert_response :bad_request, 
+       "should not be able to update a trace with a different ID from the XML"
+
+    # And finally try an update that should work
+    basic_authorization(users(:normal_user).display_name, "test")
+    t = gpx_files(:public_trace_file)
+    t.description = "Changed description"
+    t.visibility = "private"
+    content t.to_xml
+    put :api_update, :id => t.id
+    assert_response :success
+    nt = Trace.find(t.id)
+    assert_equal nt.description, t.description
+    assert_equal nt.visibility, t.visibility
+  end
+
+  # Check deleting a trace through the api
+  def test_api_delete
+    # First with no auth
+    delete :api_delete, :id => gpx_files(:public_trace_file).id
+    assert_response :unauthorized
+
+    # Now with some other user, which should fail
+    basic_authorization(users(:public_user).display_name, "test")
+    delete :api_delete, :id => gpx_files(:public_trace_file).id
+    assert_response :forbidden
+
+    # Now with a trace which doesn't exist
+    basic_authorization(users(:public_user).display_name, "test")
+    delete :api_delete, :id => 0
+    assert_response :not_found
+
+    # And finally we should be able to do it with the owner of the trace
+    basic_authorization(users(:normal_user).display_name, "test")
+    delete :api_delete, :id => gpx_files(:public_trace_file).id
+    assert_response :success
+
+    # Try it a second time, which should fail
+    basic_authorization(users(:normal_user).display_name, "test")
+    delete :api_delete, :id => gpx_files(:public_trace_file).id
     assert_response :not_found
   end
 end