arangodb/lib/Utilities/ScriptLoader.cpp

////////////////////////////////////////////////////////////////////////////////
/// @brief source code loader
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#include "ScriptLoader.h"

#include "Basics/MutexLocker.h"
#include "Basics/files.h"
#include "Basics/logging.h"
#include "Basics/tri-strings.h"
#include "Basics/StringUtils.h"

using namespace std;
using namespace triagens::basics;
using namespace triagens::arango;

// -----------------------------------------------------------------------------
// --SECTION--                                      constructors and destructors
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief constructs a loader
////////////////////////////////////////////////////////////////////////////////

ScriptLoader::ScriptLoader ()
  : _scripts(),
    _directory(),
    _lock() {
}

// -----------------------------------------------------------------------------
// --SECTION--                                                    public methods
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief gets the directory for scripts
////////////////////////////////////////////////////////////////////////////////

string const& ScriptLoader::getDirectory () const {
  return _directory;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief sets the directory for scripts
////////////////////////////////////////////////////////////////////////////////

void ScriptLoader::setDirectory (string const& directory) {
  MUTEX_LOCKER(_lock);

  _directory = directory;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief build a script from an array of strings
////////////////////////////////////////////////////////////////////////////////

string ScriptLoader::buildScript (const char** script) {
  string scriptString;

  while (true) {
    string tempStr = string(*script);

    if (tempStr == "//__end__") {
      break;
    }

    scriptString += tempStr + "\n";

    ++script;
  }

  return scriptString;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief defines a new named script
////////////////////////////////////////////////////////////////////////////////

void ScriptLoader::defineScript (string const& name, string const& script) {
  MUTEX_LOCKER(_lock);

  _scripts[name] = script;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief defines a new named script
////////////////////////////////////////////////////////////////////////////////

void ScriptLoader::defineScript (string const& name, const char** script) {
  string scriptString = buildScript(script);

  MUTEX_LOCKER(_lock);

  _scripts[name] = scriptString;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief finds a named script
////////////////////////////////////////////////////////////////////////////////

string const& ScriptLoader::findScript (string const& name) {
  static string empty = "";

  MUTEX_LOCKER(_lock);

  map<string, string>::iterator i = _scripts.find(name);

  if (i != _scripts.end()) {
    return i->second;
  }

  if (! _directory.empty()) {
    vector<string> parts = getDirectoryParts();

    for (size_t i = 0; i < parts.size(); i++) {
      char* filename = TRI_Concatenate2File(parts.at(i).c_str(), name.c_str());
      char* result = TRI_SlurpFile(TRI_CORE_MEM_ZONE, filename, nullptr);

      if (result == nullptr && (i == parts.size() - 1)) {
        LOG_ERROR("cannot locate file '%s': %s",
                  StringUtils::correctPath(name).c_str(),
                  TRI_last_error());
      }

      TRI_FreeString(TRI_CORE_MEM_ZONE, filename);

      if (result != nullptr) {
        _scripts[name] = result;
        TRI_FreeString(TRI_CORE_MEM_ZONE, result);
        return _scripts[name];
      }
    }
  }

  return empty;
}

// -----------------------------------------------------------------------------
// --SECTION--                                                 protected methods
// -----------------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////
/// @brief gets a list of all specified directory parts
////////////////////////////////////////////////////////////////////////////////

vector<string> ScriptLoader::getDirectoryParts () {
  vector<string> directories;

  if (! _directory.empty()) {

    // .........................................................................
    // for backwards compatibility allow ":" as a delimiter for POSIX like
    // implementations, otherwise we will only allow ";"
    // .........................................................................

#ifdef _WIN32
      TRI_vector_string_t parts = TRI_Split2String(_directory.c_str(), ";");
#else
      TRI_vector_string_t parts = TRI_Split2String(_directory.c_str(), ":;");
#endif

    for (size_t i = 0; i < parts._length; i++) {
      string part = StringUtils::trim(parts._buffer[i]);

      if (! part.empty()) {
        directories.push_back(part);
      }
    }

    TRI_DestroyVectorString(&parts);
  }

  return directories;
}

// -----------------------------------------------------------------------------
// --SECTION--                                                       END-OF-FILE
// -----------------------------------------------------------------------------

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