mirror of
https://github.com/OpenRCT2/OpenRCT2
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111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
#pragma region Copyright (c) 2014-2018 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#include "Plugin.h"
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#include <dukglue/dukglue.h>
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#include <duktape.h>
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#include <algorithm>
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#include <fstream>
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#include <memory>
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using namespace OpenRCT2::Scripting;
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Plugin::Plugin(duk_context * context, const std::string &path)
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: _context(context),
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_path(path)
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{
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}
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Plugin::Plugin(const Plugin&& src)
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: _context(src._context),
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_path(src._path),
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_metadata(src._metadata)
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{
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}
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void Plugin::Load()
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{
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std::string projectedVariables = "console,park";
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std::string code;
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{
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std::ifstream fs(_path);
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if (fs.is_open())
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{
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fs.seekg(0, std::ios::end);
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code.reserve(fs.tellg());
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fs.seekg(0, std::ios::beg);
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code.assign(
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std::istreambuf_iterator<char>(fs),
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std::istreambuf_iterator<char>());
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}
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}
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// Wrap the script in a function and pass the global objects as variables
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// so that if the script modifies them, they are not modified for other scripts.
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code = "(function(" + projectedVariables + "){" + code + "})(" + projectedVariables + ");";
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auto flags = DUK_COMPILE_EVAL | DUK_COMPILE_SAFE | DUK_COMPILE_NOSOURCE | DUK_COMPILE_NOFILENAME;
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auto result = duk_eval_raw(_context, code.c_str(), code.size(), flags);
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if (result != DUK_ERR_NONE)
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{
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auto val = std::string(duk_safe_to_string(_context, -1));
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duk_pop(_context);
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throw std::runtime_error("Failed to load plug-in script: " + val);
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}
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_metadata = GetMetadata(DukValue::take_from_stack(_context));
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}
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void Plugin::Start()
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{
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const auto& mainFunc = _metadata.Main;
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mainFunc.push();
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auto result = duk_pcall(_context, 0);
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if (result != DUK_ERR_NONE)
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{
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auto val = std::string(duk_safe_to_string(_context, -1));
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duk_pop(_context);
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throw std::runtime_error("[" + _metadata.Name + "] " + val);
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}
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duk_pop(_context);
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}
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PluginMetadata Plugin::GetMetadata(const DukValue& dukMetadata)
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{
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PluginMetadata metadata;
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if (dukMetadata.type() == DukValue::Type::OBJECT)
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{
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metadata.Name = dukMetadata["name"].as_string();
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metadata.Version = dukMetadata["version"].as_string();
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auto dukAuthors = dukMetadata["authors"];
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dukAuthors.push();
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if (dukAuthors.is_array())
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{
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auto elements = dukAuthors.as_array();
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std::transform(
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elements.begin(),
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elements.end(),
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std::back_inserter(metadata.Authors),
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[](const DukValue& v) { return v.as_string(); });
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}
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else
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{
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metadata.Authors = { dukAuthors.as_string() };
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}
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metadata.Main = dukMetadata["main"];
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}
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return metadata;
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}
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