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// Map, wardley map editor for linux
// Copyright (C) 2026 Rubén Beltrán del Río
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
use std::fs;
use std::path::PathBuf;
use crate::constants;
use super::models::{UserPreferences, UserPreferencesJson};
/// Returns the XDG config directory path for preferences
pub fn config_dir() -> PathBuf {
dirs::config_dir()
.unwrap_or_else(|| PathBuf::from("."))
.join(constants::APP_ID)
}
/// Returns the preferences file path
pub fn preferences_path() -> PathBuf {
config_dir().join("preferences.json")
}
/// Loads preferences from disk, returning defaults if not found
pub fn load() -> UserPreferences {
let path = preferences_path();
if path.exists() {
match fs::read_to_string(&path) {
Ok(content) => serde_json::from_str(&content).unwrap_or_default(),
Err(_) => UserPreferences::default(),
}
} else {
UserPreferences::default()
}
}
/// Saves preferences to disk
pub fn save(preferences: &UserPreferences) -> Result<(), std::io::Error> {
let path = preferences_path();
if let Some(parent) = path.parent() {
fs::create_dir_all(parent)?;
}
let content = serde_json::to_string_pretty(preferences).map_err(std::io::Error::other)?;
fs::write(path, content)
}
/// Exports preferences to JSON string (for file export)
pub fn export_json(preferences: &UserPreferences) -> Option<String> {
let json_preferences = preferences.to_json();
serde_json::to_string_pretty(&json_preferences).ok()
}
/// Imports preferences from JSON string (partial updates supported)
/// Returns true on success, false on parse error
pub fn import_json(preferences: &mut UserPreferences, json: &str) -> bool {
match serde_json::from_str::<UserPreferencesJson>(json) {
Ok(imported) => {
preferences.update_from_json(&imported);
true
}
Err(_) => false,
}
}
/// Saves preferences to a specific file path (for export dialog)
pub fn export_to_file(preferences: &UserPreferences, path: &PathBuf) -> Result<(), std::io::Error> {
let content =
export_json(preferences).ok_or_else(|| std::io::Error::other("Serialization failed"))?;
fs::write(path, content)
}
/// Loads preferences from a specific file path (for import dialog)
pub fn import_from_file(
preferences: &mut UserPreferences,
path: &PathBuf,
) -> Result<(), std::io::Error> {
let content = fs::read_to_string(path)?;
if import_json(preferences, &content) {
Ok(())
} else {
Err(std::io::Error::new(
std::io::ErrorKind::InvalidData,
"Invalid preferences format",
))
}
}
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