refact: improve method of launcher helper append variant value

Signed-off-by: ComixHe <heyuming@deepin.org>

apps/app-launch-helper/src/CMakeLists.txt

@@ -1,7 +1,10 @@
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(SYSTEMD REQUIRED IMPORTED_TARGET libsystemd)
 
-add_executable(${APP_LAUNCH_HELPER_BIN} main.cpp)
+file(GLOB APP_LAUNCH_HELPER_SOURCE ${CMAKE_CURRENT_LIST_DIR}/*.cpp)
+
+add_executable(${APP_LAUNCH_HELPER_BIN} ${APP_LAUNCH_HELPER_SOURCE})
+
 target_link_libraries(${APP_LAUNCH_HELPER_BIN} PRIVATE
     PkgConfig::SYSTEMD
 )

apps/app-launch-helper/src/main.cpp

@@ -3,35 +3,21 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 
 #include <numeric>
-#include <systemd/sd-bus.h>
-#include <systemd/sd-journal.h>
-#include <string_view>
-#include <string>
+#include <unordered_map>
 #include <vector>
 #include <deque>
 #include <memory>
 #include <iostream>
-#include <string>
 #include <algorithm>
 #include <cstdlib>
 #include <map>
 #include <thread>
 #include "constant.h"
+#include "types.h"
+#include "variantValue.h"
 
 namespace {
 
-enum class ExitCode { SystemdError = -3, InvalidInput = -2, InternalError = -1, Done = 0, Waiting = 1 };
-
-struct JobRemoveResult
-{
-    std::string_view id;
-    int removedFlag{0};
-    ExitCode result{ExitCode::Waiting};
-};
-
-using msg_ptr = sd_bus_message *;
-using bus_ptr = sd_bus *;
-
 ExitCode fromString(const std::string &str)
 {
     if (str == "done") {
@@ -153,6 +139,45 @@ int processExecStart(msg_ptr &msg, const std::deque<std::string_view> &execArgs)
     return 0;
 }
 
+DBusValueType getPropType(std::string_view key)
+{
+    static std::unordered_map<std::string_view, DBusValueType> map{{"Environment", DBusValueType::ArrayOfString}};
+
+    if (auto it = map.find(key); it != map.cend()) {
+        return it->second;
+    }
+
+    return DBusValueType::Default;
+}
+
+int appendPropValue(msg_ptr &msg, DBusValueType type, std::string_view value)
+{
+    int ret;
+
+    auto handler = creatValueHandler(msg, type);
+    if (handler == nullptr) {
+        sd_journal_perror("unknown type of property's variant.");
+        return -1;
+    }
+
+    if (ret = handler->openVariant(); ret < 0) {
+        sd_journal_perror("open property's variant value failed.");
+        return ret;
+    }
+
+    if (ret = handler->appendValue(std::string{value}); ret < 0) {
+        sd_journal_perror("append property's variant value failed.");
+        return ret;
+    }
+
+    if (ret = handler->closeVariant(); ret < 0) {
+        sd_journal_perror("close property's variant value failed.");
+        return ret;
+    }
+
+    return 0;
+}
+
 int processKVPair(msg_ptr &msg, const std::map<std::string_view, std::string_view> &props)
 {
     int ret;
@@ -160,9 +185,23 @@ int processKVPair(msg_ptr &msg, const std::map<std::string_view, std::string_vie
         for (auto [key, value] : props) {
             std::string keyStr{key};
             std::string valueStr{value};
-            ret = sd_bus_message_append(msg, "(sv)", keyStr.data(), "s", valueStr.data());
+            if (ret = sd_bus_message_open_container(msg, SD_BUS_TYPE_STRUCT, "sv"); ret < 0) {
+                sd_journal_perror("open struct of properties failed.");
+                return ret;
+            }
 
-            if (ret < 0) {
+            if (ret = sd_bus_message_append(msg, "s", keyStr.data()); ret < 0) {
+                sd_journal_perror("append key of property failed.");
+                return ret;
+            }
+
+            if (ret = appendPropValue(msg, getPropType(key), valueStr); ret < 0) {
+                sd_journal_perror("append value of property failed.");
+                return ret;
+            }
+
+            if (ret = sd_bus_message_close_container(msg); ret < 0) {
+                sd_journal_perror("close struct of properties failed.");
                 return ret;
             }
         }

apps/app-launch-helper/src/types.h

@@ -0,0 +1,27 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+#ifndef TYPES_H
+#define TYPES_H
+
+#include <systemd/sd-bus.h>
+#include <systemd/sd-journal.h>
+#include <string>
+#include <string_view>
+
+enum class ExitCode { SystemdError = -3, InvalidInput = -2, InternalError = -1, Done = 0, Waiting = 1 };
+
+enum class DBusValueType { Default, ArrayOfString };
+
+using msg_ptr = sd_bus_message *;
+using bus_ptr = sd_bus *;
+
+struct JobRemoveResult
+{
+    std::string_view id;
+    int removedFlag{0};
+    ExitCode result{ExitCode::Waiting};
+};
+
+#endif

apps/app-launch-helper/src/variantValue.h

@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+#include "types.h"
+#include <memory>
+
+class VariantValue
+{
+public:
+    explicit VariantValue(msg_ptr &msg)
+        : m_msg(msg)
+    {
+    }
+    virtual ~VariantValue() = default;
+    VariantValue(const VariantValue &) = delete;
+    VariantValue(VariantValue &&) = delete;
+    VariantValue &operator=(const VariantValue &) = delete;
+    VariantValue &operator=(VariantValue &&) = delete;
+
+    virtual int openVariant() noexcept = 0;
+    virtual int closeVariant() noexcept = 0;
+    virtual int appendValue(std::string &&value) noexcept = 0;
+
+    msg_ptr &msgRef() noexcept { return m_msg; }
+
+private:
+    msg_ptr &m_msg;
+};
+
+class StringValue : public VariantValue
+{
+    using VariantValue::VariantValue;
+
+public:
+    int openVariant() noexcept override;
+    int closeVariant() noexcept override;
+    int appendValue(std::string &&value) noexcept override;
+};
+
+class ASValue : public VariantValue
+{
+    using VariantValue::VariantValue;
+
+public:
+    int openVariant() noexcept override;
+    int closeVariant() noexcept override;
+    int appendValue(std::string &&value) noexcept override;
+};
+
+std::unique_ptr<VariantValue> creatValueHandler(msg_ptr &msg, DBusValueType type);

apps/app-launch-helper/src/variantvalue.cpp

@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+#include "variantValue.h"
+#include <sstream>
+
+std::unique_ptr<VariantValue> creatValueHandler(msg_ptr &msg, DBusValueType type)
+{
+    switch (type) {
+    case DBusValueType::Default:
+        return std::make_unique<StringValue>(msg);
+    case DBusValueType::ArrayOfString:
+        return std::make_unique<ASValue>(msg);
+    default:
+        return nullptr;
+    }
+}
+
+int StringValue::openVariant() noexcept
+{
+    return sd_bus_message_open_container(msgRef(), SD_BUS_TYPE_VARIANT, "s");
+}
+
+int StringValue::closeVariant() noexcept
+{
+    return sd_bus_message_close_container(msgRef());
+}
+
+int StringValue::appendValue(std::string &&value) noexcept
+{
+    return sd_bus_message_append(msgRef(), "s", value.data());
+}
+
+int ASValue::openVariant() noexcept
+{
+    return sd_bus_message_open_container(msgRef(), SD_BUS_TYPE_VARIANT, "as");
+}
+
+int ASValue::closeVariant() noexcept
+{
+    return sd_bus_message_close_container(msgRef());
+}
+
+int ASValue::appendValue(std::string &&value) noexcept
+{
+    std::string envs{std::move(value)};
+    std::istringstream stream{envs};
+    int ret{0};
+
+    if (ret = sd_bus_message_open_container(msgRef(), SD_BUS_TYPE_ARRAY, "s"); ret < 0) {
+        return ret;
+    }
+
+    for (std::string line; std::getline(stream, line, ';');) {
+        if (ret = sd_bus_message_append(msgRef(), "s", line.data()); ret < 0) {
+            return ret;
+        }
+    }
+
+    return sd_bus_message_close_container(msgRef());
+}