fix(datetime): ionChange/ngModel returns the correct value

src/components/datetime/datetime.ts

@@ -267,13 +267,14 @@ import { dateValueRange, renderDateTime, renderTextFormat, convertFormatToKey, g
   providers: [ { provide: NG_VALUE_ACCESSOR, useExisting: DateTime, multi: true } ],
   encapsulation: ViewEncapsulation.None,
 })
-export class DateTime extends BaseInput<DateTimeData> implements AfterViewInit, ControlValueAccessor, OnDestroy {
+export class DateTime extends BaseInput<DateTimeData|string> implements AfterViewInit, ControlValueAccessor, OnDestroy {
 
   _text: string = '';
   _min: DateTimeData;
   _max: DateTimeData;
   _locale: LocaleData = {};
   _picker: Picker;
+  _internalValue: DateTimeData = {};
 
   /**
    * @input {string} The minimum datetime allowed. Value must be a date string
@@ -436,6 +437,21 @@ export class DateTime extends BaseInput<DateTimeData> implements AfterViewInit,
     this._initialize();
   }
 
+  /**
+   * @hidden
+   */
+  _inputReset() {
+    this._internalValue = {};
+  }
+
+  /**
+   * @hidden
+   */
+  _inputCheckHasValue(val: any) {
+    updateDate(this._internalValue, val);
+    super._inputCheckHasValue(val);
+  }
+
   /**
    * @hidden
    */
@@ -446,16 +462,16 @@ export class DateTime extends BaseInput<DateTimeData> implements AfterViewInit,
   /**
    * @hidden
    */
-  _inputNormalize(val: any): DateTimeData {
+  _inputShouldChange(): boolean {
-    updateDate(this._value, val);
+    return true;
-    return this._value;
   }
 
   /**
+   * TODO: REMOVE THIS
    * @hidden
    */
-  _inputShouldChange(): boolean {
+  _inputChangeEvent(): any {
-    return true;
+    return this.value;
   }
 
   @HostListener('click', ['$event'])
@@ -742,7 +758,7 @@ export class DateTime extends BaseInput<DateTimeData> implements AfterViewInit,
    * @hidden
    */
   getValue(): DateTimeData {
-    return this._value;
+    return this._internalValue;
   }
 
   /**

src/util/base-input.ts

@@ -143,9 +143,13 @@ export class BaseInput<T> extends Ion implements CommonInput<T> {
     if (isUndefined(val)) {
       return false;
     }
-    const normalized = (val === null)
+    let normalized;
-      ? deepCopy(this._defaultValue)
+    if (val === null) {
-      : this._inputNormalize(val);
+      normalized = deepCopy(this._defaultValue);
+      this._inputReset();
+    } else {
+      normalized = this._inputNormalize(val);
+    }
 
     const notUpdate = isUndefined(normalized) || !this._inputShouldChange(normalized);
     if (notUpdate) {
@@ -285,7 +289,12 @@ export class BaseInput<T> extends Ion implements CommonInput<T> {
   /**
    * @hidden
    */
-  initFocus() {}
+  initFocus() { }
+
+  /**
+   * @hidden
+   */
+  _inputReset() { }
 
   /**
    * @hidden