Restructure rule classes.

Classes under "rulesets" have been moved to "rules", and split up into
futher subdirectories matching their library. As a result we can now
better separate the python bindings, so that things that belongs to the
simulation are separeted from things that belongs to the ai.

rules/python/PythonWrapper.cpp

@@ -0,0 +1,141 @@
+// Cyphesis Online RPG Server and AI Engine
+// Copyright (C) 2005 Alistair Riddoch
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+#include "PythonWrapper.h"
+#include "CyPy_Operation.h"
+#include "CyPy_Oplist.h"
+#include "CyPy_LocatedEntity.h"
+
+#include "common/compose.hpp"
+#include "common/log.h"
+#include "common/operations/Tick.h"
+#include "common/debug.h"
+#include "common/log.h"
+
+static const bool debug_flag = false;
+
+/// \brief PythonWrapper constructor
+PythonWrapper::PythonWrapper(const Py::Object& wrapper)
+    : m_wrapper(wrapper)
+{
+}
+
+PythonWrapper::~PythonWrapper() = default;
+
+
+HandlerResult PythonWrapper::operation(const std::string& op_type,
+                                            const Operation& op,
+                                            OpVector& res)
+{
+    assert(!m_wrapper.isNull());
+    std::string op_name = op_type + "_operation";
+    debug_print("Got script object for " << op_name);
+    if (!m_wrapper.hasAttr(op_name)) {
+        debug_print("No method to be found for " << op_name);
+        return OPERATION_IGNORED;
+    }
+
+    try {
+        auto ret = m_wrapper.callMemberFunction(op_name, Py::TupleN(CyPy_Operation::wrap(op)));
+
+        debug_print("Called python method " << op_name);
+        return processScriptResult(op_name, ret, res);
+
+    } catch (const Py::BaseException& py_ex) {
+        log(ERROR, String::compose("Python error calling \"%1\" on " +
+                                   m_wrapper.as_string(), op_name));
+        if (PyErr_Occurred()) {
+            PyErr_Print();
+        }
+        if (op->getClassNo() == Atlas::Objects::Operation::TICK_NO) {
+            log(ERROR,
+                String::compose("Script for %1 has reported an error "
+                                "processing a tick operation. "
+                                "This entity is probably now inactive.",
+                                m_wrapper.as_string()));
+        }
+        return OPERATION_IGNORED;
+    }
+}
+
+void PythonWrapper::hook(const std::string& function,
+                              LocatedEntity* entity)
+{
+    auto wrapper = CyPy_LocatedEntity::wrap(entity);
+    if (wrapper.isNull()) {
+        return;
+    }
+
+    try {
+        auto ret = m_wrapper.callMemberFunction(function, Py::TupleN(wrapper));
+    } catch (const Py::BaseException& py_ex) {
+        log(ERROR, "Could not call hook function " + function + " on " + wrapper.type().as_string());
+        if (PyErr_Occurred()) {
+            PyErr_Print();
+        }
+    }
+
+}
+
+
+
+HandlerResult PythonWrapper::processScriptResult(const std::string& scriptName, const Py::Object& ret, OpVector& res)
+{
+    HandlerResult result = OPERATION_IGNORED;
+
+    auto processPythonResultFn = [&](const Py::Object& pythonResult) {
+        if (pythonResult.isLong()) {
+            auto numRet = Py::Long(pythonResult).as_long();
+            if (numRet == 0) {
+                result = OPERATION_IGNORED;
+            } else if (numRet == 1) {
+                result = OPERATION_HANDLED;
+            } else if (numRet == 2) {
+                result = OPERATION_BLOCKED;
+            } else {
+                log(ERROR, String::compose("Unrecognized return code %1 for script '%2'", numRet, scriptName));
+            }
+
+        } else if (CyPy_Operation::check(pythonResult)) {
+            res.push_back(std::move(CyPy_Operation::value(pythonResult)));
+        } else if (CyPy_Oplist::check(pythonResult)) {
+            auto& o = CyPy_Oplist::value(pythonResult);
+            for (auto& opRes : o) {
+                res.push_back(opRes);
+            }
+        } else {
+            log(ERROR, String::compose("Python script \"%1\" returned an invalid "
+                                       "result.", scriptName));
+        }
+    };
+
+    if (ret.isNone()) {
+        debug_print("Returned none");
+    } else {
+        //Check if it's a tuple and process it.
+        if (ret.isTuple()) {
+            for (auto item : Py::Tuple(ret)) {
+                processPythonResultFn(item);
+            }
+        } else {
+            processPythonResultFn(ret);
+        }
+    }
+
+    return result;
+}