Add lnms commands to get and set config settings (#10534)

* add lnms commands to get and set config settings
lnms config:get and lnms config:set
Note: you cannot override settings in config.php

* Update to check setting exists and value validation rules.

LibreNMS/Config.php

@@ -297,6 +297,23 @@ class Config
         }
     }
 
+    /**
+     * Forget a key and all it's descendants from persistent storage.
+     * This will effectively set it back to default.
+     *
+     * @param string $key
+     * @return int|false
+     */
+    public static function erase($key)
+    {
+        self::forget($key);
+        try {
+            return \App\Models\Config::withChildren($key)->delete();
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+
     /**
      * Check if a setting is set
      *

LibreNMS/Util/DynamicConfigItem.php

@@ -70,11 +70,13 @@ class DynamicConfigItem implements \ArrayAccess
         } elseif ($this->type == 'boolean') {
             return filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE) !== null;
         } elseif ($this->type == 'integer') {
-            return filter_var($value, FILTER_VALIDATE_INT) || $value === "0" || $value === 0;
+            return (!is_bool($value) && filter_var($value, FILTER_VALIDATE_INT)) || $value === "0" || $value === 0;
         } elseif ($this->type == 'select') {
             return in_array($value, array_keys($this->options));
         } elseif ($this->type == 'email') {
             return filter_var($value, FILTER_VALIDATE_EMAIL);
+        } elseif ($this->type == 'array') {
+            return is_array($value); // this should probably have more complex validation via validator rules
         } elseif (in_array($this->type, ['text', 'password'])) {
             return true;
         }
@@ -185,7 +187,7 @@ class DynamicConfigItem implements \ArrayAccess
     {
         return $this->validate
             ? implode(" \n", $this->buildValidator($value)->messages()->get('value'))
-            : __('settings.validate.' . $this->type, ['id' => $this->name, 'value' => is_array($value) ? json_encode($value) : $value]);
+            : __('settings.validate.' . $this->type, ['id' => $this->name, 'value' => json_encode($value)]);
     }
 
     // ArrayAccess functions