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apps/backend/src/lib/footerLayoutSettings.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, test } from 'bun:test'
+import { DEFAULT_FOOTER_LAYOUT_SETTINGS } from '@homaroma/types'
+import {
+  mergeFooterLayoutSettings,
+  normalizeFooterLayoutSettings,
+  validateFooterLayoutSettingsPatch,
+} from './footerLayoutSettings'
+
+describe('footer layout settings', () => {
+  test('normalizes missing and invalid persisted values to the shared default', () => {
+    expect(normalizeFooterLayoutSettings(null)).toEqual(DEFAULT_FOOTER_LAYOUT_SETTINGS)
+    expect(normalizeFooterLayoutSettings({ columns: ['brand'] })).toEqual(
+      DEFAULT_FOOTER_LAYOUT_SETTINGS,
+    )
+  })
+
+  test('preserves a valid persisted layout', () => {
+    const layout = { ...DEFAULT_FOOTER_LAYOUT_SETTINGS, mobileColumns: 2 as const }
+    expect(normalizeFooterLayoutSettings(layout)).toEqual(layout)
+  })
+
+  test('merges a partial finale patch without losing sibling settings', () => {
+    expect(mergeFooterLayoutSettings(DEFAULT_FOOTER_LAYOUT_SETTINGS, {
+      containerWidth: 'wide',
+      finale: { enabled: false },
+    })).toEqual({
+      ...DEFAULT_FOOTER_LAYOUT_SETTINGS,
+      containerWidth: 'wide',
+      finale: { ...DEFAULT_FOOTER_LAYOUT_SETTINGS.finale, enabled: false },
+    })
+  })
+
+  test('strictly rejects unknown patch fields', () => {
+    const result = validateFooterLayoutSettingsPatch({ arbitraryCss: 'display:none' })
+    expect(result.success).toBe(false)
+  })
+})

apps/backend/src/lib/footerLayoutSettings.ts

@@ -0,0 +1,32 @@
+import {
+  DEFAULT_FOOTER_LAYOUT_SETTINGS,
+  FooterLayoutSettingsPatchSchema,
+  FooterLayoutSettingsSchema,
+  type FooterLayoutSettings,
+  type FooterLayoutSettingsPatch,
+} from '@homaroma/types'
+
+export function normalizeFooterLayoutSettings(value: unknown): FooterLayoutSettings {
+  const result = FooterLayoutSettingsSchema.safeParse(value)
+  if (result.success) return result.data
+
+  return FooterLayoutSettingsSchema.parse(DEFAULT_FOOTER_LAYOUT_SETTINGS)
+}
+
+export function validateFooterLayoutSettingsPatch(value: unknown) {
+  return FooterLayoutSettingsPatchSchema.safeParse(value)
+}
+
+export function mergeFooterLayoutSettings(
+  current: FooterLayoutSettings,
+  patch: FooterLayoutSettingsPatch,
+): FooterLayoutSettings {
+  return FooterLayoutSettingsSchema.parse({
+    ...current,
+    ...patch,
+    finale: {
+      ...current.finale,
+      ...patch.finale,
+    },
+  })
+}