Allow custom text properties to be included

src/file/custom-properties/custom-property.ts

@@ -0,0 +1,26 @@
+import { XmlComponent } from "file/xml-components";
+import { CustomPropertyAttributes } from "./custom-property-attributes";
+
+export interface ICustomPropertyOptions {
+    readonly name: string;
+    readonly value: string;
+}
+
+export class CustomProperty extends XmlComponent {
+    constructor(id: number, properties: ICustomPropertyOptions) {
+        super("property");
+        this.root.push(new CustomPropertyAttributes({
+            fmtid: "{D5CDD505-2E9C-101B-9397-08002B2CF9AE}",
+            pid: id.toString(),
+            name: properties.name,
+        }));
+        this.root.push(new CustomPropertyValue(properties.value));
+    }
+}
+
+export class CustomPropertyValue extends XmlComponent {
+    constructor(value: string) {
+        super("vt:lpwstr");
+        this.root.push(value);
+    }
+}