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1 | 1 | #include <Plugin/PluginManager.h> |
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2 | 2 | |
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3 | 3 | #include <Plugin/IPlugin.h> |
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4 | 4 | |
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5 | 5 | #include <QDir> |
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6 | 6 | #include <QLibrary> |
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7 | 7 | #include <QPluginLoader> |
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8 | 8 | |
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9 | 9 | Q_LOGGING_CATEGORY(LOG_PluginManager, "PluginManager") |
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10 | 10 | |
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11 | 11 | namespace { |
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12 | 12 | |
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13 | 13 | /// Key for retrieving metadata of the plugin |
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14 | 14 | const auto PLUGIN_METADATA_KEY = QStringLiteral("MetaData"); |
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15 | 15 | |
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16 | 16 | /// Key for retrieving the name of the plugin in its metadata |
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17 | 17 | const auto PLUGIN_NAME_KEY = QStringLiteral("name"); |
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18 | 18 | |
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19 | /// Helper to state the plugin loading operation | |
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20 | struct LoadPluginState { | |
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21 | explicit LoadPluginState(const QString &pluginPath) | |
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22 | : m_PluginPath{pluginPath}, m_Valid{true}, m_ErrorMessage{} | |
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23 | { | |
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24 | } | |
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25 | ||
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26 | void log() const | |
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27 | { | |
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28 | if (m_Valid) { | |
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29 | qCDebug(LOG_PluginManager()) | |
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30 | << QObject::tr("File '%1' has been loaded as a plugin").arg(m_PluginPath); | |
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31 | } | |
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32 | else { | |
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33 | qCWarning(LOG_PluginManager()) | |
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34 | << QObject::tr("File '%1' can't be loaded as a plugin: %2") | |
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35 | .arg(m_PluginPath) | |
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36 | .arg(m_ErrorMessage); | |
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37 | } | |
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38 | } | |
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39 | ||
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40 | void setError(const QString &errorMessage) | |
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41 | { | |
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42 | m_Valid = false; | |
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43 | m_ErrorMessage = errorMessage; | |
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44 | } | |
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45 | ||
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46 | QString m_PluginPath; | |
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47 | bool m_Valid; | |
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48 | QString m_ErrorMessage; | |
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49 | }; | |
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50 | ||
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19 | 51 | } // namespace |
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20 | 52 | |
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21 | 53 | struct PluginManager::PluginManagerPrivate { |
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22 | 54 | /** |
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23 | 55 | * Loads a single plugin into SciQlop. The method has no effect if the plugin is malformed (e.g. |
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24 | 56 | * wrong library type, missing metadata, etc.) |
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25 | 57 | * @param pluginPath the path to the plugin library. |
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26 | 58 | */ |
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27 | 59 | void loadPlugin(const QString &pluginPath) |
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28 | 60 | { |
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29 | 61 | qCDebug(LOG_PluginManager()) |
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30 | 62 | << QObject::tr("Attempting to load file '%1' as a plugin").arg(pluginPath); |
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31 | 63 | |
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64 | LoadPluginState loadState{pluginPath}; | |
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65 | ||
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32 | 66 | if (QLibrary::isLibrary(pluginPath)) { |
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33 | 67 | QPluginLoader pluginLoader{pluginPath}; |
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34 | 68 | |
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35 | 69 | // Retrieving the plugin name to check if it can be loaded (i.e. no plugin with the same |
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36 | 70 | // name has been registered yet) |
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37 | 71 | auto metadata = pluginLoader.metaData().value(PLUGIN_METADATA_KEY).toObject(); |
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38 | 72 | auto pluginName = metadata.value(PLUGIN_NAME_KEY).toString(); |
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39 | 73 | |
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40 | 74 | if (pluginName.isEmpty()) { |
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41 | /// @todo ALX : log error | |
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75 | loadState.setError(QObject::tr("empty file name")); | |
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42 | 76 | } |
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43 | 77 | else if (m_RegisteredPlugins.contains(pluginName)) { |
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44 | /// @todo ALX : log error | |
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78 | loadState.setError(QObject::tr("name '%1' already registered").arg(pluginName)); | |
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45 | 79 | } |
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46 | 80 | else { |
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47 | 81 | if (auto pluginInstance = qobject_cast<IPlugin *>(pluginLoader.instance())) { |
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48 | 82 | pluginInstance->initialize(); |
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49 | 83 | m_RegisteredPlugins.insert(pluginName, pluginPath); |
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50 | 84 | } |
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51 | 85 | else { |
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52 | /// @todo ALX : log error | |
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86 | loadState.setError(QObject::tr("the file is not a Sciqlop plugin")); | |
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53 | 87 | } |
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54 | 88 | } |
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55 | 89 | } |
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56 | 90 | else { |
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57 | /// @todo ALX : log error | |
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91 | loadState.setError(QObject::tr("the file is not a library")); | |
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58 | 92 | } |
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93 | ||
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94 | // Log loading result | |
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95 | loadState.log(); | |
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59 | 96 | } |
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60 | 97 | |
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61 | 98 | /// Registered plugins (key: plugin name, value: plugin path) |
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62 | 99 | QHash<QString, QString> m_RegisteredPlugins; |
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63 | 100 | }; |
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64 | 101 | |
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65 | 102 | PluginManager::PluginManager() : impl{spimpl::make_unique_impl<PluginManagerPrivate>()} |
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66 | 103 | { |
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67 | 104 | } |
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68 | 105 | |
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69 | 106 | void PluginManager::loadPlugins(const QDir &pluginDir) |
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70 | 107 | { |
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71 | 108 | // Load plugins |
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72 | 109 | auto pluginInfoList = pluginDir.entryInfoList(QDir::Files, QDir::Name); |
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73 | 110 | for (auto pluginInfo : qAsConst(pluginInfoList)) { |
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74 | 111 | impl->loadPlugin(pluginInfo.absoluteFilePath()); |
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75 | 112 | } |
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76 | 113 | } |
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77 | 114 | |
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78 | 115 | int PluginManager::nbPluginsLoaded() const noexcept |
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79 | 116 | { |
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80 | 117 | /// @todo ALX |
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81 | 118 | return 0; |
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82 | 119 | } |
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