Support the "BCC self" option

delta-connection.c

@@ -32,6 +32,8 @@ _transpose_config(dc_context_t *mailbox, PurpleAccount *acct)
 	const char *smtp_pass = purple_account_get_string(acct, PLUGIN_ACCOUNT_OPT_SMTP_PASS, NULL);
 	const char *smtp_port = purple_account_get_string(acct, PLUGIN_ACCOUNT_OPT_SMTP_SERVER_PORT, NULL);
 
+	gboolean bcc_self = purple_account_get_bool(acct, PLUGIN_ACCOUNT_OPT_BCC_SELF, FALSE);
+
 	dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_ADDR, addr);
 	dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_DISPLAY_NAME, display);
 
@@ -44,6 +46,12 @@ _transpose_config(dc_context_t *mailbox, PurpleAccount *acct)
 	dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_SMTP_USER, smtp_user);
 	dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_SMTP_PASS, smtp_pass);
 	dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_SMTP_SERVER_PORT, smtp_port);
+
+	if (bcc_self) {
+		dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_BCC_SELF, "1");
+	} else {
+		dc_set_config(mailbox, PLUGIN_ACCOUNT_OPT_BCC_SELF, "0");
+	};
 }
 
 typedef struct {

libdelta.c

@@ -72,6 +72,12 @@ pwd_opt(const char *text, const char *name, const char *def)
 	return option;
 }
 
+static PurpleAccountOption *
+bool_opt(const char *text, const char *name, const gboolean def)
+{
+	return purple_account_option_bool_new(text, name, def);
+}
+
 static void
 delta_init_plugin(PurplePlugin *plugin)
 {
@@ -98,6 +104,8 @@ delta_init_plugin(PurplePlugin *plugin)
 	// Not exposed: server_flags, selfstatus, e2ee_enabled
 	// https://deltachat.github.io/api/classmrmailbox__t.html
 
+	opts = g_list_prepend(opts, bool_opt("Send copy to self", PLUGIN_ACCOUNT_OPT_BCC_SELF, FALSE));
+
 	extra->protocol_options = g_list_reverse(opts);
 }
 

libdelta.h

@@ -27,6 +27,8 @@
 #define PLUGIN_ACCOUNT_OPT_SMTP_USER        "send_user"
 #define PLUGIN_ACCOUNT_OPT_SMTP_PASS        "send_pw"
 
+#define PLUGIN_ACCOUNT_OPT_BCC_SELF         "bcc_self"
+
 #define UNUSED(x) (void)(x)
 
 #endif