Copy a garden (deep duplicate) from the gardens list (#46)

Co-authored-by: Steve Dudenhoeffer <[email protected]>

web/src/lib/gardens.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, it } from 'vitest'
+import { defaultCopyName } from './gardens'
+
+// The server caps a garden name at 200 BYTES and derives a copy's name the same
+// way (copyName in internal/service/gardens.go). These cases pin the mirror: an
+// over-long prefill would come back as a 400 rather than a copy.
+describe('defaultCopyName', () => {
+  it('appends the suffix to a short name', () => {
+    expect(defaultCopyName('Home')).toBe('Home (copy)')
+  })
+
+  it('keeps a derived name within the 200-byte cap', () => {
+    const name = 'a'.repeat(200)
+    const derived = defaultCopyName(name)
+    expect(new TextEncoder().encode(derived).length).toBeLessThanOrEqual(200)
+    expect(derived.endsWith(' (copy)')).toBe(true)
+  })
+
+  it('truncates multi-byte names on a code-point boundary', () => {
+    const name = 'é'.repeat(100) // 200 bytes, exactly at the cap
+    const derived = defaultCopyName(name)
+    expect(new TextEncoder().encode(derived).length).toBeLessThanOrEqual(200)
+    // No replacement character: nothing was cut mid-code-point.
+    expect(derived).not.toContain('�')
+  })
+
+  it('does not leave a dangling space before the suffix', () => {
+    const name = 'x'.repeat(192) + ' y' // truncation lands on the space
+    expect(defaultCopyName(name)).toBe('x'.repeat(192) + ' (copy)')
+  })
+})

web/src/lib/gardens.ts

@@ -86,6 +86,50 @@ export function useUpdateGarden() {
   })
 }
 
+// Mirrors the server's garden-name cap (maxGardenNameLen in
+// internal/service/gardens.go). It is a BYTE cap, not a character count.
+const MAX_GARDEN_NAME_BYTES = 200
+const COPY_SUFFIX = ' (copy)'
+
+/** Trim s to at most maxBytes of UTF-8, never splitting a code point. */
+function truncateUtf8(s: string, maxBytes: number): string {
+  const enc = new TextEncoder()
+  if (enc.encode(s).length <= maxBytes) return s
+  let out = ''
+  let used = 0
+  for (const ch of s) {
+    const size = enc.encode(ch).length
+    if (used + size > maxBytes) break
+    out += ch
+    used += size
+  }
+  return out
+}
+
+/**
+ * The name a copy gets by default. Mirrors the server's copyName (same file as
+ * the cap above) so the prefilled value is one the server will accept — without
+ * the byte-capped truncation, copying a garden whose name is already at the cap
+ * would prefill an over-long name and fail with a 400.
+ */
+export function defaultCopyName(name: string): string {
+  return truncateUtf8(name, MAX_GARDEN_NAME_BYTES - COPY_SUFFIX.length).trim() + COPY_SUFFIX
+}
+
+/**
+ * Duplicate a garden the actor owns, including its objects and current plantings.
+ * An omitted/blank name lets the server derive "<source> (copy)". The copy does
+ * not inherit the source's public link or shares.
+ */
+export function useCopyGarden() {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: async ({ id, name }: { id: number; name?: string }): Promise<Garden> =>
+      gardenSchema.parse(await api.post(`/gardens/${id}/copy`, { name: name ?? '' })),
+    onSuccess: () => qc.invalidateQueries({ queryKey: gardensKey }),
+  })
+}
+
 export function useDeleteGarden() {
   const qc = useQueryClient()
   return useMutation({