allow for arrays

lib/Persistent.ts

@@ -1,7 +1,9 @@
+import { copy_object } from '@sapphirecode/utilities';
 import { Assignable, Serializable } from './interfaces';
 
-type PersistentTypeString = 'string'|'number'|'boolean';
-type PersistentType = string|number|boolean;
+type PersistentTypeString = 'string'|'number'|'boolean'|'array';
+type PersistentPrimitive = string|number|boolean;
+type PersistentType = PersistentPrimitive|PersistentPrimitive[];
 
 export abstract class Persistent implements Assignable, Serializable {
   private _data: Record<string, PersistentType> = {};
@@ -24,7 +26,7 @@ export abstract class Persistent implements Assignable, Serializable {
   }
 
   public to_object (): Record<string, PersistentType> {
-    return this._data;
+    return copy_object (this._data);
   }
 
   public serialize (formatted = false): string {
@@ -33,9 +35,18 @@ export abstract class Persistent implements Assignable, Serializable {
     return JSON.stringify (this.to_object (), null, 2);
   }
 
+  private check_type (value: unknown, prop: PersistentTypeString): boolean {
+    if (typeof prop === 'undefined')
+      return false;
+    if (prop === 'array')
+      return Array.isArray (value);
+
+    return typeof value === prop;
+  }
+
   public set (key: string, value: unknown): void {
     const prop = this.properties[key];
-    if (typeof prop !== 'undefined' && typeof value === prop)
+    if (this.check_type (value, prop))
       this._data[key] = value as PersistentType;
   }
 

package.json

@@ -18,5 +18,8 @@
   "files": [
     "/dist/",
     "LICENSE"
-  ]
+  ],
+  "dependencies": {
+    "@sapphirecode/utilities": "^1.0.39"
+  }
 }

yarn.lock

@@ -64,6 +64,11 @@
     eslint-plugin-node "^11.0.0"
     eslint-plugin-sort-requires-by-path "^1.0.2"
 
+"@sapphirecode/utilities@^1.0.39":
+  version "1.0.39"
+  resolved "https://registry.yarnpkg.com/@sapphirecode/utilities/-/utilities-1.0.39.tgz#12fdc564065102ea156188541941f92fbb126238"
+  integrity sha512-8IgL9Cw43ipUOIqyqXvgmvyR/s+4Mf1h75jIBwOniNM3x7EU2jJiE01ePDrdsNraaGNn6o4GnFMx6ymp07U2SQ==
+
 "@types/color-name@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@types/color-name/-/color-name-1.1.1.tgz#1c1261bbeaa10a8055bbc5d8ab84b7b2afc846a0"