feat(cart): implement cart editing policy with granular permissions

src/app/shared/components/cart-item/cart-item.component.html

@@ -26,7 +26,7 @@
       </div>
     </div>
 
-    @if (hasVariantSelectors() && !quantityDisabled()) {
+    @if (hasVariantSelectors() && !variantDisabled()) {
       <app-variant-selector
         class="cart-item-variant-selector"
         [variants]="variants()"
@@ -55,7 +55,7 @@
           (increase)="onIncrease()"
           (decrease)="onDecrease()"
         />
-        @if (!quantityDisabled() && showRemove()) {
+        @if (!removeDisabled() && allowDelete()) {
           <app-icon-button variant="trash" class="cart-item-remove-btn" (click)="onRemove()" />
         }
       </div>

src/app/shared/components/cart-item/cart-item.component.ts

@@ -31,7 +31,9 @@ export class CartItemComponent {
   readonly quantity = input<number>(1);
   readonly readonly = input<boolean>(false);
   readonly quantityDisabled = input<boolean>(false);
-  readonly showRemove = input<boolean>(true);
+  readonly variantDisabled = input<boolean>(false);
+  readonly removeDisabled = input<boolean>(false);
+  readonly allowDelete = input<boolean>(true);
 
   readonly quantityChange = output<number>();
   readonly remove = output<void>();
@@ -61,7 +63,7 @@ export class CartItemComponent {
   }
 
   protected onVariantChange(variant: unknown): void {
-    if (!this.quantityDisabled() && typeof variant === 'number') {
+    if (!this.variantDisabled() && typeof variant === 'number') {
       this.variantChange.emit(variant);
     }
   }

src/app/shared/components/cart/cart.component.html

@@ -6,7 +6,7 @@
     <h2 class="m-0 text-uppercase fw-bold cart-title">{{ title() }}</h2>
 
     <div class="d-flex align-items-center cart-header-actions">
-      @if (!readonly() && editable() && allowEditing() && items().length > 0) {
+      @if (!readonly() && allowModify() && requireEditingMode() && items().length > 0) {
         <button
           class="btn btn-link p-0 border-0 cart-edit-btn"
           type="button"
@@ -48,8 +48,22 @@
         [selectedVariant]="getItemVariant(item)"
         [quantity]="getItemQuantity(item)"
         [readonly]="readonly()"
-        [quantityDisabled]="!editable() || editingDisabled() || (allowEditing() && !editing())"
-        [showRemove]="allowRemove()"
+        [quantityDisabled]="
+          readonly() ||
+          !allowUpdateQuantity() ||
+          editingDisabled() ||
+          (requireEditingMode() && !editing())
+        "
+        [variantDisabled]="
+          readonly() ||
+          !allowUpdateVariant() ||
+          editingDisabled() ||
+          (requireEditingMode() && !editing())
+        "
+        [removeDisabled]="
+          readonly() || !allowDelete() || editingDisabled() || (requireEditingMode() && !editing())
+        "
+        [allowDelete]="allowDelete()"
         (quantityChange)="onItemQuantityChange(idx, $event)"
         (variantChange)="onItemVariantChange(idx, $event)"
         (remove)="onItemRemove(idx)"

src/app/shared/components/cart/cart.component.spec.ts

@@ -340,7 +340,7 @@ describe('CartComponent', () => {
         quantity: 1,
       },
     ]);
-    fixture.componentRef.setInput('allowEditing', true);
+    fixture.componentRef.setInput('requireEditingMode', true);
     const editingChange = vi.fn();
     fixture.componentInstance.editing.subscribe(editingChange);
     fixture.detectChanges();
@@ -408,7 +408,7 @@ describe('CartComponent', () => {
     ).toBe(false);
   });
 
-  it('hides the edit toggle and disables quantity changes when editable is false', async () => {
+  it('hides the edit toggle and disables quantity changes when quantity updates are false', async () => {
     await TestBed.configureTestingModule({
       imports: [CartComponent],
       providers: [
@@ -441,8 +441,9 @@ describe('CartComponent', () => {
         quantity: 1,
       },
     ]);
-    fixture.componentRef.setInput('allowEditing', true);
-    fixture.componentRef.setInput('editable', false);
+    fixture.componentRef.setInput('requireEditingMode', true);
+    fixture.componentRef.setInput('allowModify', false);
+    fixture.componentRef.setInput('allowUpdateQuantity', false);
     const quantityChange = vi.fn();
     fixture.componentInstance.itemQuantityChange.subscribe(quantityChange);
     fixture.detectChanges();

src/app/shared/components/cart/cart.component.ts

@@ -53,9 +53,11 @@ export class CartComponent {
   readonly total = input<number>(0);
   readonly backgroundColor = input<string>('#ffffff');
   readonly readonly = input<boolean>(false);
-  readonly editable = input<boolean>(true);
-  readonly allowEditing = input<boolean>(false);
-  readonly allowRemove = input<boolean>(true);
+  readonly allowUpdateQuantity = input<boolean>(true);
+  readonly allowModify = input<boolean>(true);
+  readonly requireEditingMode = input<boolean>(false);
+  readonly allowUpdateVariant = input<boolean>(true);
+  readonly allowDelete = input<boolean>(true);
   readonly persistQuantityChanges = input<boolean>(true);
   readonly editingDisabled = input<boolean>(false);
   readonly editing = model<boolean>(false);
@@ -125,7 +127,7 @@ export class CartComponent {
   }
 
   protected onItemQuantityChange(index: number, newQuantity: number): void {
-    if (!this.editable()) {
+    if (!this.allowUpdateQuantity()) {
       return;
     }
 
@@ -170,6 +172,8 @@ export class CartComponent {
   }
 
   protected onItemVariantChange(index: number, variantId: number): void {
+    if (this.readonly() || !this.allowUpdateVariant() || this.editingDisabled()) return;
+
     const item = this.items()[index];
     const cartItemId = item?.cartItemId;
 
@@ -200,6 +204,8 @@ export class CartComponent {
   }
 
   protected onItemRemove(index: number): void {
+    if (this.readonly() || !this.allowDelete() || this.editingDisabled()) return;
+
     const target = this.resolveRemoveTarget(index);
 
     if (!target) {
@@ -225,7 +231,7 @@ export class CartComponent {
   protected readonly formattedTotal = computed(() => this.formatCurrency(this.total()));
 
   protected toggleEditing(): void {
-    if (!this.editable() || this.editingDisabled()) {
+    if (!this.allowModify() || this.editingDisabled()) {
       return;
     }