Upload queue across all five states

"use client"

import { useState, type ReactNode } from "react"

import {
  Attachment,
  AttachmentAction,
  AttachmentActions,
  AttachmentContent,
  AttachmentDescription,
  AttachmentMedia,
  AttachmentTitle,
} from "@/components/ui/attachment"
import { Spinner } from "@/components/ui/spinner"
import { IconPlaceholder } from "@/app/(create)/components/icon-placeholder"

const ICON_QUEUED = (
  <IconPlaceholder
    lucide="ClockIcon"
    tabler="IconClock"
    hugeicons="ClockIcon"
    phosphor="ClockIcon"
    remixicon="RiTimeLine"
    aria-hidden="true"
  />
)

const ICON_SCANNING = (
  <IconPlaceholder
    lucide="FileTextIcon"
    tabler="IconFileText"
    hugeicons="File02Icon"
    phosphor="FileTextIcon"
    remixicon="RiFileTextLine"
    aria-hidden="true"
  />
)

const ICON_FAILED = (
  <IconPlaceholder
    lucide="TriangleAlertIcon"
    tabler="IconAlertTriangle"
    hugeicons="Alert02Icon"
    phosphor="WarningIcon"
    remixicon="RiAlertLine"
    aria-hidden="true"
  />
)

const ICON_DONE = (
  <IconPlaceholder
    lucide="CheckIcon"
    tabler="IconCheck"
    hugeicons="Tick02Icon"
    phosphor="CheckIcon"
    remixicon="RiCheckLine"
    aria-hidden="true"
  />
)

const ICON_RETRY = (
  <IconPlaceholder
    lucide="RotateCwIcon"
    tabler="IconRefresh"
    hugeicons="RefreshIcon"
    phosphor="ArrowClockwiseIcon"
    remixicon="RiRefreshLine"
    aria-hidden="true"
  />
)

const ICON_REMOVE = (
  <IconPlaceholder
    lucide="XIcon"
    tabler="IconX"
    hugeicons="Cancel01Icon"
    phosphor="XIcon"
    remixicon="RiCloseLine"
    aria-hidden="true"
  />
)

// The state field is typed against the primitive's own union, so a mistyped
// state is a compile error rather than a row that quietly renders plain. The
// note is two fields because the separator between them is JSX, not data.
type Row = {
  id: string
  name: string
  note: string
  detail: string
  state: "idle" | "uploading" | "processing" | "error" | "done"
}

// One node per state, looked up rather than branched, so the row markup is
// identical across all five. The spinner is the only live element and the
// primitive sizes it from the attachment size, not from a class here.
const MEDIA: Record<Row["state"], ReactNode> = {
  idle: ICON_QUEUED,
  uploading: <Spinner />,
  processing: ICON_SCANNING,
  error: ICON_FAILED,
  done: ICON_DONE,
}

// Five rows for five states, so the whole vocabulary is on screen at once
// instead of behind a control the reader has to find first.
const QUEUE: Row[] = [
  {
    id: "terms",
    name: "annual-plan-terms.pdf",
    note: "Ready to upload",
    detail: "1.2 MB",
    state: "idle",
  },
  {
    id: "replay",
    name: "session-replay.mp4",
    note: "Uploading",
    detail: "62%",
    state: "uploading",
  },
  {
    id: "chargebacks",
    name: "chargeback-export.csv",
    note: "Scanning for card numbers",
    detail: "3.1 MB",
    state: "processing",
  },
  {
    id: "ledger",
    name: "ledger-2024.xlsx",
    note: "Failed",
    detail: "connection dropped",
    state: "error",
  },
  {
    id: "evidence",
    name: "dispute-evidence.pdf",
    note: "Uploaded",
    detail: "840 KB",
    state: "done",
  },
]

export function Pattern() {
  const [rows, setRows] = useState<Row[]>(QUEUE)

  // Counted during render instead of tracked alongside rows, so the header can
  // never disagree with the list it is counting.
  const finished = rows.filter((row) => row.state === "done").length

  // Retry resolves straight to done. A timer would quietly animate the error
  // row away, and the error row is the one this example exists to show. The
  // failure is a dropped connection, so a second attempt plausibly succeeds.
  const retry = (id: string) =>
    setRows((current) =>
      current.map((row) =>
        row.id === id
          ? { ...row, state: "done", note: "Uploaded", detail: "640 KB" }
          : row
      )
    )

  // Dismiss drops the row from state and leaves the seed untouched, so the
  // queue comes back whole when the example remounts.
  const dismiss = (id: string) =>
    setRows((current) => current.filter((row) => row.id !== id))

  return (
    <div className="mx-auto flex w-full max-w-xl flex-col gap-2">
      <p className="text-muted-foreground text-xs" aria-live="polite">
        {finished} of {rows.length} uploaded
      </p>
      {rows.map((row) => (
        <Attachment key={row.id} state={row.state} className="w-full">
          <AttachmentMedia>{MEDIA[row.state]}</AttachmentMedia>
          <AttachmentContent>
            {/*
             * The uploading and processing titles animate their own highlight:
             * that is the primitive reacting to data-state, not a per row job.
             */}
            <AttachmentTitle>{row.name}</AttachmentTitle>
            {/*
             * The failing row states its reason here, because the error state
             * is otherwise carried by colour alone. The description truncates,
             * so the same text doubles as the title for a narrow card.
             */}
            <AttachmentDescription title={`${row.note} (${row.detail})`}>
              {row.note}
              <span
                aria-hidden="true"
                className="bg-muted-foreground/40 mx-1.5 inline-block size-1 rounded-full align-middle"
              />
              {row.detail}
            </AttachmentDescription>
          </AttachmentContent>
          <AttachmentActions>
            {row.state === "error" ? (
              <AttachmentAction
                type="button"
                aria-label={`Retry ${row.name}`}
                onClick={() => retry(row.id)}
              >
                {ICON_RETRY}
              </AttachmentAction>
            ) : null}
            {/*
             * The dismiss label changes with the state. Cancelling an upload in
             * flight and removing a finished file are different promises.
             */}
            <AttachmentAction
              type="button"
              aria-label={
                row.state === "uploading" || row.state === "processing"
                  ? `Cancel upload of ${row.name}`
                  : `Remove ${row.name}`
              }
              onClick={() => dismiss(row.id)}
            >
              {ICON_REMOVE}
            </AttachmentAction>
          </AttachmentActions>
        </Attachment>
      ))}
      {rows.length === 0 ? (
        <p className="text-muted-foreground text-xs">
          Nothing left in the queue.
        </p>
      ) : null}
    </div>
  )
}