[Gazebo 11] Allow gazebo to download models from Fuel in the sdf files

gazebo/Server.cc

@@ -33,7 +33,10 @@
 #include <sdf/sdf.hh>
 
 #include <ignition/math/Rand.hh>
-#include "ignition/common/Profiler.hh"
+#include <ignition/common/Profiler.hh>
+#include <ignition/common/Filesystem.hh>
+#include <ignition/common/URI.hh>
+#include <ignition/fuel_tools/Interface.hh>
 
 #include "gazebo/gazebo.hh"
 #include "gazebo/transport/transport.hh"
@@ -402,9 +405,36 @@ bool Server::LoadFile(const std::string &_filename,
     return false;
   }
 
-  if (!sdf::readFile(common::find_file(_filename), sdf))
+  std::string filename = _filename;
+  auto filenameUri = ignition::common::URI(filename);
+
+  if (filenameUri.Scheme() == "http" || filenameUri.Scheme() == "https")
   {
-    gzerr << "Unable to read sdf file[" << _filename << "]\n";
+    std::string downloadedDir = ignition::fuel_tools::fetchResource(filename);
+    // Find the first sdf file in the world path for now, the later intention is
+    // to load an optional world config file first and if that does not exist,
+    // continue to load the first sdf file found as done below
+    for (ignition::common::DirIter file(downloadedDir);
+         file != ignition::common::DirIter(); ++file)
+    {
+      std::string current(*file);
+      if (ignition::common::isFile(current))
+      {
+        std::string fileName = ignition::common::basename(current);
+        std::string::size_type fileExtensionIndex = fileName.rfind(".");
+        std::string fileExtension = fileName.substr(fileExtensionIndex + 1);
+
+        if (fileExtension == "sdf" || fileExtension == "world")
+        {
+          filename = current.c_str();
+        }
+      }
+    }
+  }
+
+  if (!sdf::readFile(common::find_file(filename), sdf))
+  {
+    gzerr << "Unable to read sdf file[" << filename << "]\n";
     return false;
   }
 

gazebo/common/CommonIface.cc

@@ -47,8 +47,11 @@
 #include "gazebo/common/Console.hh"
 #include "gazebo/common/CommonIface.hh"
 #include "gazebo/common/Exception.hh"
+#include "gazebo/common/FuelModelDatabase.hh"
 #include "gazebo/common/SystemPaths.hh"
 
+#include "ignition/fuel_tools/Interface.hh"
+
 using namespace gazebo;
 
 #ifdef _WIN32
@@ -159,7 +162,12 @@ void common::add_search_path_suffix(const std::string &_suffix)
 /////////////////////////////////////////////////
 std::string common::find_file(const std::string &_file)
 {
-  return common::SystemPaths::Instance()->FindFile(_file, true);
+  std::string path = common::FuelModelDatabase::Instance()->ModelPath(_file);
+  if (path.empty())
+  {
+    path = common::SystemPaths::Instance()->FindFile(_file, true);
+  }
+  return path;
 }
 
 /////////////////////////////////////////////////

gazebo/common/FuelModelDatabase.cc

@@ -213,26 +213,54 @@ std::string FuelModelDatabase::ModelPath(const std::string &_uri,
   }
 
   std::string path;
+  std::string fileUrl;
+  ignition::fuel_tools::ModelIdentifier model;
+  using namespace ignition::fuel_tools;
 
-  if (!_forceDownload)
+  if ((this->dataPtr->fuelClient->ParseModelUrl(fuelUri, model) &&
+       !this->dataPtr->fuelClient->CachedModel(fuelUri, path))
+      || _forceDownload)
   {
-    if (this->dataPtr->fuelClient->CachedModel(fuelUri, path))
+    Result result_download =
+      this->dataPtr->fuelClient->DownloadModel(fuelUri, path);
+    if (result_download != Result(ResultType::FETCH) ||
+      result_download != Result(ResultType::FETCH_ALREADY_EXISTS))
     {
-      return path;
+      gzerr << "Unable to download model[" << _uri << "]" << std::endl;
+      return std::string();
+    }
+    else
+    {
+        gzmsg << "Downloaded model URL: " << std::endl
+              << "          " << _uri << std::endl
+              << "      to: " << std::endl
+              << "          " << path << std::endl;
     }
   }
-
-  if (!this->dataPtr->fuelClient->DownloadModel(fuelUri, path))
-  {
-    gzerr << "Unable to download model[" << _uri << "]" << std::endl;
-    return std::string();
-  }
-  else
-  {
-      gzmsg << "Downloaded model URL: " << std::endl
-            << "          " << _uri << std::endl
-            << "      to: " << std::endl
-            << "          " << path << std::endl;
+  if (path.empty()) {
+    if ((this->dataPtr->fuelClient->ParseModelFileUrl(fuelUri, model, fileUrl) &&
+        !this->dataPtr->fuelClient->CachedModelFile(fuelUri, path))
+      || _forceDownload)
+    {
+      auto modelUri = _uri.substr(0,
+          _uri.find("files", model.UniqueName().size())-1);
+      Result result_download =
+        this->dataPtr->fuelClient->DownloadModel(ignition::common::URI(modelUri), path);
+      if (result_download != Result(ResultType::FETCH) ||
+        result_download != Result(ResultType::FETCH_ALREADY_EXISTS))
+      {
+        gzerr << "Unable to download model[" << _uri << "]" << std::endl;
+        return std::string();
+      }
+      else
+      {
+          gzmsg << "Downloaded model URL: " << std::endl
+                << "          " << _uri << std::endl
+                << "      to: " << std::endl
+                << "          " << path << std::endl;
+          path += "/" + fileUrl;
+      }
+    }
   }
 
   return path;

gazebo/gui/InsertModelWidget.cc

@@ -48,21 +48,6 @@ using namespace gui;
 
 static bool gInsertModelWidgetDeleted = false;
 
-/////////////////////////////////////////////////
-// TODO: Remove this once Fuel support is fully functional
-bool usingFuel()
-{
-  auto useFuel = std::getenv("USE_IGNITION_FUEL");
-  if (!useFuel || *useFuel == '\0')
-    return false;
-
-  std::string useFuelStr(useFuel);
-  std::transform(useFuelStr.begin(), useFuelStr.end(),
-                 useFuelStr.begin(), ::tolower);
-
-  return useFuelStr != "false" && useFuelStr != "0";
-}
-
 /////////////////////////////////////////////////
 InsertModelWidget::InsertModelWidget(QWidget *_parent)
 : QWidget(_parent), dataPtr(new InsertModelWidgetPrivate)
@@ -523,9 +508,6 @@ bool InsertModelWidget::IsPathAccessible(const boost::filesystem::path &_path)
 /////////////////////////////////////////////////
 void InsertModelWidget::InitializeFuelServers()
 {
-  if (!usingFuel())
-    return;
-
   // Get the list of Ignition Fuel servers.
   auto servers = common::FuelModelDatabase::Instance()->Servers();
 
@@ -550,9 +532,6 @@ void InsertModelWidget::InitializeFuelServers()
 /////////////////////////////////////////////////
 void InsertModelWidget::PopulateFuelServers()
 {
-  if (!usingFuel())
-    return;
-
   // Get the list of Ignition Fuel servers.
   auto servers = common::FuelModelDatabase::Instance()->Servers();
 

test/integration/factory.cc

@@ -1249,6 +1249,68 @@ TEST_F(FactoryTest, FilenameFuelURL)
   // Check model was spawned
   ASSERT_NE(nullptr, world->ModelByName("test_box"));
 }
+
+TEST_F(FactoryTest, worldWithFuelModels)
+{
+  this->Load("worlds/fuel_models.world", true);
+
+  // World
+  auto world = physics::get_world("default");
+  ASSERT_NE(nullptr, world);
+
+  // Wait for it to be spawned
+  int sleep = 0;
+  int maxSleep = 50;
+  while (!world->ModelByName("Radio") && sleep++ < maxSleep)
+  {
+    common::Time::MSleep(100);
+  }
+
+  // Check model was spawned
+  ASSERT_NE(nullptr, world->ModelByName("Radio"));
+}
+
+TEST_F(FactoryTest, FuelURIAsWorldArgument)
+{
+  this->Load(
+    "https://staging-fuel.ignitionrobotics.org/1.0/chapulina/worlds/Shapes",
+    true);
+
+  // World
+  auto world = physics::get_world("default");
+  ASSERT_NE(nullptr, world);
+
+  // Wait for it to be spawned
+  int sleep = 0;
+  int maxSleep = 50;
+  while (!world->ModelByName("box") && sleep++ < maxSleep)
+  {
+    common::Time::MSleep(100);
+  }
+
+  // Check model was spawned
+  ASSERT_NE(nullptr, world->ModelByName("box"));
+
+  sleep = 0;
+  maxSleep = 50;
+  while (!world->ModelByName("cylinder") && sleep++ < maxSleep)
+  {
+    common::Time::MSleep(100);
+  }
+
+  // Check model was spawned
+  ASSERT_NE(nullptr, world->ModelByName("cylinder"));
+
+  sleep = 0;
+  maxSleep = 50;
+  while (!world->ModelByName("sphere") && sleep++ < maxSleep)
+  {
+    common::Time::MSleep(100);
+  }
+
+  // Check model was spawned
+  ASSERT_NE(nullptr, world->ModelByName("sphere"));
+}
 #endif
 
 //////////////////////////////////////////////////

worlds/fuel_models.world

@@ -0,0 +1,39 @@
+<?xml version="1.0" ?>
+<sdf version="1.5">
+  <world name="default">
+    <!-- A global light source -->
+    <include>
+      <uri>model://sun</uri>
+    </include>
+    <!-- A ground plane -->
+    <include>
+      <uri>model://ground_plane</uri>
+    </include>
+
+    <include>
+      <pose>0 1 3 0.0 0.0 1.57</pose>
+      <uri>https://fuel.ignitionrobotics.org/1.0/openrobotics/models/Construction Cone</uri>
+    </include>
+
+    <model name="Radio">
+      <pose>3 -1.5 0 0 0 0</pose>
+      <static>true</static>
+      <link name="link">
+        <collision name="collision">
+          <geometry>
+            <mesh>
+              <uri>https://fuel.ignitionrobotics.org/1.0/openrobotics/models/Radio/4/files/meshes/Radio.dae</uri>
+            </mesh>
+          </geometry>
+        </collision>
+        <visual name="visual">
+          <geometry>
+            <mesh>
+              <uri>https://fuel.ignitionrobotics.org/1.0/openrobotics/models/Radio/4/files/meshes/Radio.dae</uri>
+            </mesh>
+          </geometry>
+        </visual>
+      </link>
+    </model>
+  </world>
+</sdf>