lib: Update for new querying machinery

Port to c++ and use new APIs.

lib/mu-msg-priv.hh

@@ -0,0 +1,134 @@
+/*
+** Copyright (C) 2008-2020 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** 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 3 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.
+**
+*/
+
+#ifndef MU_MSG_PRIV_HH__
+#define MU_MSG_PRIV_HH__
+
+#include <gmime/gmime.h>
+#include <stdlib.h>
+
+#include <mu-msg.hh>
+#include <mu-msg-file.hh>
+#include <mu-msg-doc.hh>
+#include "mu-msg-part.hh"
+
+namespace Mu {
+
+struct MuMsgFile {
+	GMimeMessage	*_mime_msg;
+	time_t		 _timestamp;
+	size_t		 _size;
+	char	         *_path;
+	char		 *_maildir;
+};
+
+
+/* we put the the MuMsg definition in this separate -priv file, so we
+ * can split the mu_msg implementations over separate files */
+struct MuMsg {
+
+	guint		 _refcount;
+
+	/* our two backend */
+	MuMsgFile	*_file; /* based on GMime, ie. a file on disc */
+	MuMsgDoc        *_doc;  /* based on Xapian::Document */
+
+	/* lists where we push allocated strings / GSLists of string
+	 * so we can free them when the struct gets destroyed (and we
+	 * can return them as 'const to callers)
+	 */
+	GSList          *_free_later_str;
+	GSList          *_free_later_lst;
+};
+
+
+/**
+ * convert a GMimePart to a string
+ *
+ * @param part a GMimePart
+ * @param err will receive TRUE if there was an error, FALSE
+ * otherwise. Must NOT be NULL.
+ *
+ * @return utf8 string for this MIME part, to be freed by caller
+ */
+gchar* mu_msg_mime_part_to_string (GMimePart *part, gboolean *err)
+      G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
+
+
+/**
+ * Like g_mime_message_foreach, but will recurse into encrypted parts
+ * if @param decrypt is TRUE and mu was built with crypto support
+ *
+ * @param msg a GMimeMessage
+ * @param decrypt whether to try to automatically decrypt
+ * @param func user callback function for each part
+ * @param user_data user point passed to callback function
+ * @param err receives error information
+ *
+ */
+void mu_mime_message_foreach (GMimeMessage *msg, gboolean decrypt,
+			      GMimeObjectForeachFunc func,
+			      gpointer user_data);
+
+/**
+ * callback function to retrieve a password from the user
+ *
+ * @param user_id the user name / id to get the password for
+ * @param prompt_ctx a string containing some helpful context for the prompt
+ * @param reprompt whether this is a reprompt after an earlier, incorrect password
+ * @param user_data the user_data pointer passed to mu_msg_part_decrypt_foreach
+ *
+ * @return a newly allocated (g_free'able) string
+ */
+typedef char* (*MuMsgPartPasswordFunc)   (const char *user_id, const char *prompt_ctx,
+					  gboolean reprompt, gpointer user_data);
+
+
+/**
+ * verify the signature of a signed message part
+ *
+ * @param sig a signed message part
+ * @param opts message options
+ * @param err receive error information
+ *
+ * @return a status report object, free with mu_msg_part_sig_status_report_destroy
+ */
+void mu_msg_crypto_verify_part (GMimeMultipartSigned *sig,
+                                MuMsgOptions opts,
+                                GError **err);
+
+/**
+ * decrypt the given encrypted mime multipart
+ *
+ * @param enc encrypted part
+ * @param opts options
+ * @param password_func callback function to retrieve as password (or NULL)
+ * @param user_data pointer passed to the password func
+ * @param err receives error data
+ *
+ * @return the decrypted part, or NULL in case of error
+ */
+GMimeObject* mu_msg_crypto_decrypt_part (GMimeMultipartEncrypted *enc, MuMsgOptions opts,
+					 MuMsgPartPasswordFunc func, gpointer user_data,
+					 GError **err)
+					G_GNUC_MALLOC G_GNUC_WARN_UNUSED_RESULT;
+
+} // namespace Mu
+
+#endif /*MU_MSG_PRIV_HH__*/