Admin Page work - Still blank/broken

frontend/src/features/admin/catalog/catalogShared.ts

@@ -0,0 +1,157 @@
+import {
+  CatalogEngine,
+  CatalogMake,
+  CatalogModel,
+  CatalogTrim,
+  CatalogYear,
+} from '../types/admin.types';
+
+export type CatalogLevel = 'makes' | 'models' | 'years' | 'trims' | 'engines';
+
+export type CatalogRow =
+  | CatalogMake
+  | CatalogModel
+  | CatalogYear
+  | CatalogTrim
+  | CatalogEngine;
+
+export interface CatalogSelectionContext {
+  level: CatalogLevel;
+  make?: CatalogMake;
+  model?: CatalogModel;
+  year?: CatalogYear;
+  trim?: CatalogTrim;
+}
+
+export const LEVEL_LABEL: Record<CatalogLevel, string> = {
+  makes: 'Makes',
+  models: 'Models',
+  years: 'Years',
+  trims: 'Trims',
+  engines: 'Engines',
+};
+
+export const LEVEL_SINGULAR_LABEL: Record<CatalogLevel, string> = {
+  makes: 'Make',
+  models: 'Model',
+  years: 'Year',
+  trims: 'Trim',
+  engines: 'Engine',
+};
+
+export const NEXT_LEVEL: Record<CatalogLevel, CatalogLevel | null> = {
+  makes: 'models',
+  models: 'years',
+  years: 'trims',
+  trims: 'engines',
+  engines: null,
+};
+
+export const pluralize = (count: number, singular: string): string =>
+  `${count} ${singular}${count === 1 ? '' : 's'}`;
+
+export const getCascadeSummary = (
+  level: CatalogLevel,
+  selectedItems: CatalogRow[],
+  modelsByMake: Map<string, CatalogModel[]>,
+  yearsByModel: Map<string, CatalogYear[]>,
+  trimsByYear: Map<string, CatalogTrim[]>,
+  enginesByTrim: Map<string, CatalogEngine[]>
+): string => {
+  if (selectedItems.length === 0) {
+    return '';
+  }
+
+  if (level === 'engines') {
+    return 'Deleting engines will remove their configuration details.';
+  }
+
+  let modelCount = 0;
+  let yearCount = 0;
+  let trimCount = 0;
+  let engineCount = 0;
+
+  if (level === 'makes') {
+    selectedItems.forEach((item) => {
+      const make = item as CatalogMake;
+      const makeModels = modelsByMake.get(make.id) ?? [];
+      modelCount += makeModels.length;
+      makeModels.forEach((model) => {
+        const modelYears = yearsByModel.get(model.id) ?? [];
+        yearCount += modelYears.length;
+        modelYears.forEach((year) => {
+          const yearTrims = trimsByYear.get(year.id) ?? [];
+          trimCount += yearTrims.length;
+          yearTrims.forEach((trim) => {
+            const trimEngines = enginesByTrim.get(trim.id) ?? [];
+            engineCount += trimEngines.length;
+          });
+        });
+      });
+    });
+
+    return `Deleting ${selectedItems.length} ${LEVEL_LABEL.makes.toLowerCase()} will also remove ${pluralize(
+      modelCount,
+      'model'
+    )}, ${pluralize(yearCount, 'year')}, ${pluralize(
+      trimCount,
+      'trim'
+    )}, and ${pluralize(engineCount, 'engine')}.`;
+  }
+
+  if (level === 'models') {
+    selectedItems.forEach((item) => {
+      const model = item as CatalogModel;
+      const modelYears = yearsByModel.get(model.id) ?? [];
+      yearCount += modelYears.length;
+      modelYears.forEach((year) => {
+        const yearTrims = trimsByYear.get(year.id) ?? [];
+        trimCount += yearTrims.length;
+        yearTrims.forEach((trim) => {
+          const trimEngines = enginesByTrim.get(trim.id) ?? [];
+          engineCount += trimEngines.length;
+        });
+      });
+    });
+
+    return `Deleting ${selectedItems.length} ${LEVEL_LABEL.models.toLowerCase()} will also remove ${pluralize(
+      yearCount,
+      'year'
+    )}, ${pluralize(trimCount, 'trim')}, and ${pluralize(
+      engineCount,
+      'engine'
+    )}.`;
+  }
+
+  if (level === 'years') {
+    selectedItems.forEach((item) => {
+      const year = item as CatalogYear;
+      const yearTrims = trimsByYear.get(year.id) ?? [];
+      trimCount += yearTrims.length;
+      yearTrims.forEach((trim) => {
+        const trimEngines = enginesByTrim.get(trim.id) ?? [];
+        engineCount += trimEngines.length;
+      });
+    });
+
+    return `Deleting ${selectedItems.length} ${LEVEL_LABEL.years.toLowerCase()} will also remove ${pluralize(
+      trimCount,
+      'trim'
+    )} and ${pluralize(engineCount, 'engine')}.`;
+  }
+
+  if (level === 'trims') {
+    selectedItems.forEach((item) => {
+      const trim = item as CatalogTrim;
+      const trimEngines = enginesByTrim.get(trim.id) ?? [];
+      engineCount += trimEngines.length;
+    });
+
+    return `Deleting ${selectedItems.length} ${LEVEL_LABEL.trims.toLowerCase()} will also remove ${pluralize(
+      engineCount,
+      'engine'
+    )}.`;
+  }
+
+  return '';
+};