feat: prevent minus sign typing

ember-amount-input/src/components/amount-input.ts

@@ -5,6 +5,8 @@ import './amount-input.css';
 const KEY_CODE_E = 69;
 const KEY_CODE_FULLSTOP = 190;
 const KEY_CODE_COMMA = 188;
+const KEY_CODE_MINUS = 189;
+const KEY_MINUS = '-';
 
 export interface AmountInputArgs {
   /**
@@ -27,6 +29,11 @@ export interface AmountInputArgs {
    */
   inputId?: string;
 
+  /**
+   * Specifies if the input value should be restricted to integer only
+   */
+  integerOnly?: boolean;
+
   /**
    * Specifies the minimum value for the input field
    */
@@ -102,6 +109,13 @@ export default class AmountInput extends Component<AmountInputSignature> {
     return this.argOrDefault('inputId', 'amount-input');
   }
 
+  /**
+   * Specifies if the input value should be restricted to integer only
+   */
+  get integerOnly(): boolean {
+    return this.argOrDefault('integerOnly', false);
+  }
+
   /**
    * Specifies the number of decimals to use for the amount value.
    * Can be >= 0.
@@ -130,9 +144,14 @@ export default class AmountInput extends Component<AmountInputSignature> {
 
   @action
   onKeyDown(event: KeyboardEvent): boolean {
+    const isMinus = event.keyCode === KEY_CODE_MINUS || event.key === KEY_MINUS;
+
     if (event.keyCode === KEY_CODE_E) {
       event.preventDefault();
       return false;
+    } else if (this.integerOnly && isMinus) {
+      event.preventDefault();
+      return false;
     } else if (
       this.numberOfDecimal === 0 &&
       [KEY_CODE_FULLSTOP, KEY_CODE_COMMA].includes(event.keyCode)

test-app/tests/integration/components/amount-input/component-test.ts

@@ -222,4 +222,45 @@ module('Integration | Component | amount-input', function (hooks) {
       });
     });
   });
+
+  module('integer only values', function () {
+    test('should not prevent negative values', async function (this: TestContext, assert) {
+      this.value = null as unknown as number;
+
+      await render<TestContext>(hbs`
+        <AmountInput
+          @numberOfDecimal={{0}}
+          @value={{this.value}}
+          @update={{fn (mut this.value)}}
+        />
+      `);
+
+      assert.dom('input').hasValue('');
+
+      await fillIn('input', '-1000');
+      await blur('input');
+
+      assert.dom('input').hasValue('-1000');
+    });
+
+    test('should prevent negative values', async function (this: TestContext, assert) {
+      this.value = 1;
+
+      await render<TestContext>(hbs`
+        <AmountInput
+          @numberOfDecimal={{0}}
+          @value={{this.value}}
+          @update={{fn (mut this.value)}}
+          @integerOnly={{true}}
+        />
+      `);
+
+      assert.dom('input').hasValue('1');
+
+      await typeIn('input', '-1000');
+      await blur('input');
+
+      assert.dom('input').hasValue('1000');
+    });
+  });
 });