Add docsting for pass plugin

plugins/Pass/passphraseprovider.h

@@ -10,49 +10,91 @@
 #include <gpgme++/interfaces/passphraseprovider.h>
 #include "gpg.h"
 
-
-
+/**
+ * @class UTPassphraseProvider
+ * @brief A passphrase provider for GPG operations that interacts with a QML dialog.
+ *
+ * This class implements the `PassphraseProvider` interface from GPGME and is responsible for
+ * obtaining passphrases for GPG operations. It does so by triggering a QML dialog to prompt the user
+ * for their passphrase. The response is then handled asynchronously, and the passphrase is returned to
+ * the calling GPGME function.
+ */
 class UTPassphraseProvider : public QObject, public PassphraseProvider
 {
     Q_OBJECT
 
 public slots:
-    void handleResponse(bool canceled, QString p)
-        {
-            qDebug() << "call handleResponse";
-            if (!canceled)
-                gpgrt_asprintf(&m_passphrase, "%s", p.toUtf8().constData());
-            else
-                m_canceled = true;
-            emit unlockEventLoop();
-        };
+    /**
+     * @brief Slot to handle the user's response from the passphrase dialog.
+     *
+     * This method processes the response from the passphrase dialog. If the user provides a passphrase,
+     * it is stored; if the operation is canceled, a flag is set.
+     *
+     * @param canceled Whether the user canceled the passphrase entry.
+     * @param passphrase The passphrase entered by the user.
+     */
+    void handleResponse(bool canceled, QString passphrase)
+    {
+        qDebug() << "call handleResponse";
+        if (!canceled)
+            gpgrt_asprintf(&m_passphrase, "%s", passphrase.toUtf8().constData());
+        else
+            m_canceled = true;
+        emit unlockEventLoop();
+    };
 
 signals:
+    /**
+     * @brief Signal to unlock the event loop.
+     *
+     * This signal is emitted when the passphrase has been entered or the operation has been canceled,
+     * unlocking the event loop waiting for the response.
+     */
     void unlockEventLoop();
 
 private:
-    std::unique_ptr<QSemaphore> m_sem;
-    char *m_passphrase;
-    bool m_canceled;
-    QObject* m_window;
-
+    std::unique_ptr<QSemaphore> m_sem; /**< Semaphore for managing access. */
+    char *m_passphrase; /**< The passphrase provided by the user. */
+    bool m_canceled; /**< Flag indicating whether the passphrase operation was canceled. */
+    QObject *m_window; /**< The window object that triggers the QML dialog. */
 
 public:
-    UTPassphraseProvider(QObject* window):
-        m_sem(std::unique_ptr<QSemaphore>(new QSemaphore(1))),
-        m_passphrase(nullptr),
-        m_canceled(false),
-        m_window(window)
+    /**
+     * @brief Constructs a UTPassphraseProvider.
+     *
+     * Initializes the semaphore, passphrase, and canceled flag. Sets the window object that will
+     * trigger the passphrase dialog.
+     *
+     * @param window The QObject representing the window that interacts with QML.
+     */
+    UTPassphraseProvider(QObject* window)
+        : m_sem(std::make_unique<QSemaphore>(1)),
+          m_passphrase(nullptr),
+          m_canceled(false),
+          m_window(window)
     {
-        qDebug() << "Initialize UTPassphraseProviderr";
-
+        qDebug() << "Initialize UTPassphraseProvider";
     }
 
-    char *getPassphrase( const char *useridHint,
-                         const char *description,
-                         bool previousWasBad,
-                         bool &canceled ) Q_DECL_OVERRIDE {
-         qDebug() << "Call the getPassphrase";
+    /**
+     * @brief Implements the PassphraseProvider's `getPassphrase` method.
+     *
+     * This method is called by GPGME to retrieve the passphrase needed for GPG operations. It triggers
+     * a QML dialog for the user to input their passphrase. The method waits for the response and returns
+     * the passphrase if successful, or null if canceled.
+     *
+     * @param useridHint A hint for the user ID to which the passphrase corresponds.
+     * @param description A description of the passphrase request.
+     * @param previousWasBad Flag indicating whether the previous passphrase attempt was incorrect.
+     * @param canceled Reference to a boolean flag that will be set if the operation is canceled.
+     *
+     * @return The passphrase as a `char *` or `nullptr` if canceled.
+     */
+    char *getPassphrase(const char *useridHint,
+                        const char *description,
+                        bool previousWasBad,
+                        bool &canceled) Q_DECL_OVERRIDE {
+        qDebug() << "Call the getPassphrase";
         if (!this->m_sem->tryAcquire(1, 500))
         {
             qWarning() << "Cannot acquire UTPassphraseProvider semaphore.";
@@ -92,4 +134,5 @@ public:
         return ret;
     };
 };
+
 #endif