App JSON Settings

App settings as JSON format stored in file and available via read-by-key and write-by-key.

Aims a tiny settings manager with reasonably few dependencies.

Examples

Rust - as Tauri backend

use app_json_settings::JsonSettigs;

#[tauri::command]
fn settings_read_by_key(key: &str) -> Result<KeyValue, String> {
    JsonSettigs::exe_dir().read_by_key(key).map_err(|err| err.to_string())
}

#[tauri::command]
fn settings_write_by_key(key: &str, value: Value) -> Result<(), String> {
    JsonSettigs::exe_dir().write_by_key(key, &value).map_err(|err| err.to_string())
}

Instead of JsonSettigs::exe_dir() above, where to store the settings file has options.

TypeScript - as Tauri frontend

import { invoke } from '@tauri-apps/api/core'

interface ReadByKeyResponse {
  key: string
  value: unknown
  file_exists: boolean
  key_exists: boolean
}

const read = (key: string): Promise<unknown> => {
  return invoke('settings_read_by_key', { key: key }).then((res) => {
    const _res = res as ReadByKeyResponse
    if (!_res.file_exists || !_res.key_exists) return undefined
    return _res.value
  })
}

const write = (key: string, value: any) => {
  invoke('settings_write_by_key', { key: key, value: value })
}

settings.json

{
  "keyBoolean": true,
  "keyNumber": 1000,
  "keyString": "Hello world."
}

Acknowledgements

Depends on: serde / serde_json .