feat: add InputNumber decorator converting numeric inputs to number type

projects/ng-utils/src/lib/decorators/index.ts

@@ -1,3 +1,4 @@
 export * from './input-changed.decorator';
 export * from './input-observable.decorator';
 export * from './input-flag.decorator';
+export * from './input-number.decorator';

projects/ng-utils/src/lib/decorators/input-changed.decorator.ts

@@ -8,17 +8,20 @@ export interface InputChangedConfig {
   skipFirst?: boolean;
 }
 
-export function InputChanged(config: string | string[] | InputChangedConfig = {distinct: true}): MethodDecorator {
-  // process config
-  if (_.isString(config)) {
-    config = {input: config};
-  } else if (_.isArray(config)) {
-    config = {input: config};
+export function InputChanged(): MethodDecorator;
+export function InputChanged(fields:string | string[]): MethodDecorator;
+export function InputChanged(config:InputChangedConfig): MethodDecorator;
+export function InputChanged(configOrFields: string | string[] | InputChangedConfig = {distinct: true}): MethodDecorator {
+  // process configOrFields
+  if (_.isString(configOrFields)) {
+    configOrFields = {input: configOrFields};
+  } else if (_.isArray(configOrFields)) {
+    configOrFields = {input: configOrFields};
   }
 
-  let {input} = config;
+  let {input} = configOrFields;
 
-  const {distinct, skipFirst} = config;
+  const {distinct, skipFirst} = configOrFields;
 
   return (target: OnInputChangeClass, propertyKey: string, descriptor: TypedPropertyDescriptor<any>) => {
     // check for needed setup

projects/ng-utils/src/lib/decorators/input-number.decorator.ts

@@ -0,0 +1,31 @@
+import * as _ from 'lodash';
+
+export function InputNumber() {
+  return (target, inputPropertyKey: string) => {
+    const randomIndex: string = _.uniqueId('InputNumber') + '_' + inputPropertyKey;
+
+    // get original setup of input and remove it from the object
+
+    const originalInput: PropertyDescriptor = Object.getOwnPropertyDescriptor(target, inputPropertyKey);
+
+    delete target[inputPropertyKey];
+
+    // define new setup of input
+
+    Object.defineProperty(target, inputPropertyKey, {
+      get(): number {
+        return originalInput ? originalInput.get() : this[randomIndex];
+      },
+
+      set(value: string | number): void {
+        value = _.toNumber(value);
+
+        if (originalInput) {
+          originalInput.set(value);
+        } else {
+          this[randomIndex] = value;
+        }
+      }
+    });
+  };
+}