settings: Add resetSettings() method

Allows the GUI to clear settings.json file and save settings.json.bak file when
GUI "Reset Options" button is pressed or -resetguisettings command line option
is used. (GUI code already backs up and resets the "guisettings.ini" file this
way, so this just makes the same behavior possible for "settings.json")

1 files changed, 6 insertions, 3 deletions

diff --git a/src/util/system.cpp b/src/util/system.cpp
index 87d3be9d23..fa2e564791 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -526,12 +526,15 @@ bool ArgsManager::InitSettings(std::string& error)
     return true;
 }
 
-bool ArgsManager::GetSettingsPath(fs::path* filepath, bool temp) const
+bool ArgsManager::GetSettingsPath(fs::path* filepath, bool temp, bool backup) const
 {
     fs::path settings = GetPathArg("-settings", fs::path{BITCOIN_SETTINGS_FILENAME});
     if (settings.empty()) {
         return false;
     }
+    if (backup) {
+        settings += ".bak";
+    }
     if (filepath) {
         *filepath = fsbridge::AbsPathJoin(GetDataDirNet(), temp ? settings + ".tmp" : settings);
     }
@@ -572,10 +575,10 @@ bool ArgsManager::ReadSettingsFile(std::vector<std::string>* errors)
     return true;
 }
 
-bool ArgsManager::WriteSettingsFile(std::vector<std::string>* errors) const
+bool ArgsManager::WriteSettingsFile(std::vector<std::string>* errors, bool backup) const
 {
     fs::path path, path_tmp;
-    if (!GetSettingsPath(&path, /* temp= */ false) || !GetSettingsPath(&path_tmp, /* temp= */ true)) {
+    if (!GetSettingsPath(&path, /*temp=*/false, backup) || !GetSettingsPath(&path_tmp, /*temp=*/true, backup)) {
         throw std::logic_error("Attempt to write settings file when dynamic settings are disabled.");
     }