Initial commit

build/fs/api_config.js

@@ -0,0 +1,63 @@
+let Cfg = {
+  _get: ffi('void *mgos_mjs_get_config()'),
+  _set: ffi('bool mgos_config_apply(char *, bool)'),
+  _desc: ffi('void *mgos_config_schema()'),
+  _find: ffi('void *mgos_conf_find_schema_entry(char *, void *)'),
+  _type: ffi('int mgos_conf_value_type(void *)'),
+  _str: ffi('char *mgos_conf_value_string_nonnull(void *, void *)'),
+  _int: ffi('int mgos_conf_value_int(void *, void *)'),
+  _dbl: ffi('double mgos_conf_value_double(void *, void *)'),
+  _INT: 0,
+  _BOOL: 1,
+  _DBL: 2,
+  _STR: 3,
+  _OBJ: 4,
+
+  // ## **`Cfg.get(path)`**
+  // Get the config value by the configuration variable. Currently, only
+  // simple types are returned: strings, ints, booleans, doubles. Objects
+  // are not yet supported.
+  //
+  // Examples:
+  // ```javascript
+  // load('api_config.js');
+  // Cfg.get('device.id');        // returns a string
+  // Cfg.get('debug.level');      // returns an integer
+  // Cfg.get('wifi.sta.enable');  // returns a boolean
+  // ```
+  get: function(path) {
+    let entry = this._find(path, this._desc());
+    if (entry === null) return undefined;
+    let type = this._type(entry);
+    let cfg = this._get();
+    if (type === this._STR) {
+      return this._str(cfg, entry);
+    } else if (type === this._INT) {
+      return this._int(cfg, entry);
+    } else if (type === this._DBL) {
+      return this._dbl(cfg, entry);
+    } else if (type === this._BOOL) {
+      return (this._int(cfg, entry) !== 0);
+    } else if (type === this._OBJ) {
+      /* TODO */
+      return undefined;
+    } else {
+      /* TODO: an error */
+      return undefined;
+    }
+  },
+
+  // ## **`Cfg.set(obj, opt_save)`**
+  // Set the configuration. `obj` must be a subset of the whole configuation
+  // tree. `save` is boolean flag that indicating whether the change should
+  // be saved - it could be omitted, in which case it defaults to `true`.
+  // Examples:
+  // ```javascript
+  // load('api_config.js');
+  // Cfg.set({wifi: {ap: {enable: false}}});  // Disable WiFi AP mode
+  // Cfg.set({debug: {level: 3}});            // Set debug level to 3
+  // ```
+  set: function(obj, save) {
+    return this._set(JSON.stringify(obj), save === undefined ? true : save);
+  },
+};