feat(core): entity-type-label pipe for easier display of human-readable labels

src/app/core/entity-components/entity-type-label/entity-type-label-pipe.spec.ts

@@ -0,0 +1,33 @@
+import { EntityTypeLabelPipe } from "./entity-type-label.pipe";
+import { EntityRegistry } from "../../entity/database-entity.decorator";
+import { Entity } from "../../entity/model/entity";
+
+describe("EntityTypeLabelPipe", () => {
+  class TestEntity extends Entity {
+    static ENTITY_TYPE = "TestEntity";
+    static label = "test record";
+    static labelPlural = "test records";
+  }
+
+  let pipe: EntityTypeLabelPipe;
+
+  beforeEach(() => {
+    const entityRegistry = new EntityRegistry();
+    entityRegistry.add(TestEntity.ENTITY_TYPE, TestEntity);
+    pipe = new EntityTypeLabelPipe(entityRegistry);
+  });
+
+  it("returns entity-type label for a valid type/prefix", () => {
+    expect(pipe.transform(TestEntity.ENTITY_TYPE)).toBe(TestEntity.label);
+  });
+
+  it("returns entity-type label plural if flag given", () => {
+    expect(pipe.transform(TestEntity.ENTITY_TYPE, true)).toBe(
+      TestEntity.labelPlural
+    );
+  });
+
+  it("throws error on invalid entity type", () => {
+    expect(() => pipe.transform("unknown type")).toThrow();
+  });
+});

src/app/core/entity-components/entity-type-label/entity-type-label.pipe.ts

@@ -0,0 +1,18 @@
+import { Pipe, PipeTransform } from "@angular/core";
+import { EntityRegistry } from "../../entity/database-entity.decorator";
+
+/**
+ * Transform an entity type key to its human-readable label.
+ */
+@Pipe({
+  name: "entityTypeLabel",
+  standalone: true,
+})
+export class EntityTypeLabelPipe implements PipeTransform {
+  constructor(private entityTypes: EntityRegistry) {}
+
+  transform(value: string, plural: boolean = false): string {
+    const entity = this.entityTypes.get(value);
+    return plural ? entity?.labelPlural : entity?.label;
+  }
+}