CodexRestoreView.tsx

1// Peach Codex — restoration view.2//3// Two entry paths, both feeding the same ChunkBuffer:4//   • Camera scan — Aztec codes via @zxing/library5//   • PDF import — pdf.js + grid scan of each rendered page6//7// Once ChunkBuffer.isReady():8//   1. Prompt for the master passphrase.9//   2. Reconstruct + integrity-verify locally (popup) via reconstructAndVerify.10//   3. Hand the payload to the SW (RESTORE_FROM_CODEX) for actual decrypt11//      and replace.12//13// Restoration is intentionally NOT Pro-gated — a printed Codex must remain14// restorable forever, regardless of license state.1516import { createSignal, onCleanup, onMount, Show } from "solid-js";17import { sendMessage } from "../../shared/bridge";18import {19  ChunkBuffer,20  parseRawScan,21  reconstructAndVerify,22} from "../codex/restore";23import { startScanner } from "../codex/scanner";24import type { ScannerHandle } from "../codex/scanner";25import type { CodexPayload } from "../../shared/codex-types";2627interface CodexRestoreViewProps {28  onBack: () => void;29  onRestoreSuccess: () => void;30}3132type Phase =33  | "choose"34  | "scanning"35  | "pdf-import"36  | "ready"37  | "restoring"38  | "success"39  | "error";4041export function CodexRestoreView(props: CodexRestoreViewProps) {42  // The buffer is intentionally not stored in a signal — its identity is43  // stable across the lifetime of the view and we read it through the44  // `size()`/`isReady()` methods. We mirror its observable state into45  // signals so Solid can re-render.46  const buffer = new ChunkBuffer();47  let videoEl: HTMLVideoElement | undefined;48  let scanner: ScannerHandle | null = null;49  let pdfFileInput: HTMLInputElement | undefined;5051  const [phase, setPhase] = createSignal<Phase>("choose");52  const [scanned, setScanned] = createSignal(0);53  const [totalShards, setTotalShards] = createSignal<number | null>(null);54  const [dataShards, setDataShards] = createSignal<number | null>(null);55  const [verifyCode, setVerifyCode] = createSignal<string | null>(null);56  const [hint, setHint] = createSignal(57    "point your camera at the first code on page 1",58  );59  const [cameraError, setCameraError] = createSignal<string | null>(null);60  const [scanWarning, setScanWarning] = createSignal<string | null>(null);61  const [pdfProgress, setPdfProgress] = createSignal<{62    page: number;63    total: number;64  } | null>(null);65  const [pdfError, setPdfError] = createSignal<string | null>(null);66  // Hold the reconstructed payload between the integrity check and the SW67  // call so the user can re-enter the passphrase on a wrong-password failure68  // without rescanning every code.69  const [pendingPayload, setPendingPayload] = createSignal<CodexPayload | null>(70    null,71  );72  const [passphrase, setPassphrase] = createSignal("");73  const [restoreError, setRestoreError] = createSignal<string | null>(null);74  const [restoredCount, setRestoredCount] = createSignal<number | null>(null);7576  function refreshFromBuffer() {77    setScanned(buffer.size());78    const ctx = buffer.getContext();79    if (ctx) {80      setTotalShards(ctx.total);81      setDataShards(ctx.dataShards);82      setVerifyCode(ctx.verifyCode);83    }84    if (buffer.isReady() && (phase() === "scanning" || phase() === "pdf-import")) {85      setPhase("ready");86      setHint("scan complete. enter your master password to restore.");87      // Stop the camera the instant we have enough codes — no reason to keep88      // the green light on while the user types their passphrase.89      if (scanner) {90        scanner.stop();91        scanner = null;92      }93    } else if (phase() === "scanning") {94      const ds = ctx?.dataShards;95      if (ds) {96        const remaining = Math.max(ds - buffer.size(), 0);97        setHint(98          remaining > 099            ? `${remaining} more ${remaining === 1 ? "code" : "codes"} needed`100            : "almost there…",101        );102      }103    }104  }105106  function explainScanReason(reason: string): string {107    switch (reason) {108      case "foreign_codex":109        return "that code belongs to a different Codex.";110      case "bad_integrity":111        return "a code's checksum failed — try again.";112      case "duplicate":113        return ""; // not surfaced — duplicates are normal as the user pans114      case "parse_error":115        return "could not read that code.";116      default:117        return "";118    }119  }120121  async function handleScan(raw: string) {122    const parsed = parseRawScan(raw);123    if ("error" in parsed) {124      // parseRawScan failures are usually a non-Peach Aztec code or a corrupt125      // frame; quietly ignore so the scanner keeps running.126      return;127    }128129    const result = await buffer.add(parsed);130    refreshFromBuffer();131    if (!result.accepted && result.reason) {132      const msg = explainScanReason(result.reason);133      if (msg) {134        setScanWarning(msg);135        // Auto-clear so the warning doesn't linger after the user moves on.136        setTimeout(() => setScanWarning(null), 2500);137      }138    }139  }140141  function handleScannerError(err: Error) {142    setCameraError(143      err.name === "NotAllowedError"144        ? "camera access was denied. allow camera permission and reopen this screen."145        : err.message || "camera failed to start.",146    );147  }148149  async function startCameraScan() {150    setPhase("scanning");151    setCameraError(null);152    // Solid hasn't rendered the <video> element yet — defer until next tick.153    await Promise.resolve();154    if (!videoEl) return;155    try {156      scanner = await startScanner({157        videoEl,158        onScan: (text) => void handleScan(text),159        onError: (err) => handleScannerError(err),160      });161    } catch (err) {162      handleScannerError(err instanceof Error ? err : new Error(String(err)));163    }164  }165166  // The Chrome action popup dismisses the moment the OS file picker steals167  // focus, which stranded users mid-import. From the popup we instead open168  // the restore view in a standalone window (chrome.windows.create) and169  // let that window own the file dialog. Within the detached window, or in170  // any non-Chromium context that lacks chrome.windows, we trigger the171  // input directly.172  async function openPdfPicker() {173    if (autoPickPdf) {174      pdfFileInput?.click();175      return;176    }177    const canDetach =178      typeof chrome !== "undefined" &&179      typeof chrome.windows?.create === "function" &&180      typeof chrome.runtime?.getURL === "function";181    if (!canDetach) {182      pdfFileInput?.click();183      return;184    }185    try {186      await chrome.windows.create({187        url: chrome.runtime.getURL("popup.html?codex=pdf"),188        type: "popup",189        width: 460,190        height: 720,191      });192      window.close();193    } catch (err) {194      console.warn("[codex] failed to detach popup for PDF import:", err);195      pdfFileInput?.click();196    }197  }198199  async function handlePDFSelected(e: Event) {200    const input = e.currentTarget as HTMLInputElement;201    const file = input.files?.[0];202    // Reset the input so the same file can be re-selected after an error.203    input.value = "";204    if (!file) return;205206    if (!file.type.includes("pdf") && !file.name.toLowerCase().endsWith(".pdf")) {207      setPdfError("please select a Peach Codex PDF file.");208      return;209    }210211    setPhase("pdf-import");212    setPdfProgress(null);213    setPdfError(null);214215    try {216      // Dynamic import so the popup never pulls pdf.js into the camera-only217      // path — keeps the initial bundle small.218      const { importCodexPDF } = await import("../codex/pdf-import");219      const result = await importCodexPDF(file, (page, total) => {220        setPdfProgress({ page, total });221      });222223      if (result.envelopes.length === 0) {224        setPdfError(225          "no Codex codes found in this PDF. make sure you're selecting a Peach Codex PDF, not a different document.",226        );227        setPhase("choose");228        return;229      }230231      for (const envelope of result.envelopes) {232        await buffer.add(envelope);233      }234      refreshFromBuffer();235236      if (!buffer.isReady()) {237        // Some codes are missing — let the user supplement with the camera.238        setPdfError(239          `found ${buffer.size()}${240            result.totalExpected ? ` of ${result.totalExpected}` : ""241          } codes. the PDF may be incomplete — you can scan the remaining codes with your camera.`,242        );243        await startCameraScan();244      }245    } catch (err) {246      setPdfError(247        `failed to read PDF: ${err instanceof Error ? err.message : String(err)}`,248      );249      setPhase("choose");250    }251  }252253  // Detect whether we are running inside a chrome.windows.create() window254  // that was opened specifically to handle the PDF picker. The action255  // popup dismisses on focus loss, so the file dialog tears it down. When256  // routed via ?codex=pdf we know we are in a survivable window and can257  // safely auto-trigger the picker on mount.258  const autoPickPdf = (() => {259    try {260      return new URLSearchParams(window.location.search).get("codex") === "pdf";261    } catch {262      return false;263    }264  })();265266  onMount(() => {267    if (autoPickPdf) {268      // Tiny delay so the click happens after the SolidJS mount settles269      // and the hidden <input> is in the DOM.270      setTimeout(() => pdfFileInput?.click(), 50);271    }272  });273274  onCleanup(() => {275    if (scanner) {276      scanner.stop();277      scanner = null;278    }279    // `scanner.stop()` calls reader.reset(), which tears down the280    // MediaStream attached to the <video> element. Defensive: clear srcObject281    // in case the library leaves a reference behind after reset (observed in282    // older @zxing/library versions).283    if (videoEl?.srcObject) {284      const stream = videoEl.srcObject as MediaStream;285      stream.getTracks().forEach((t) => t.stop());286      videoEl.srcObject = null;287    }288  });289290  function explainRestoreError(error: string | undefined): string {291    if (!error) return "restoration failed. please try again.";292    if (error.includes("WRONG_PASSPHRASE") || error.includes("wrong"))293      return "wrong master password. try again.";294    if (error.includes("INVALID_VAULT_BLOB"))295      return "the reconstructed vault is unreadable. please re-scan the Codex.";296    if (error.includes("FINGERPRINT_MISMATCH"))297      return "vault integrity check failed. please re-scan the Codex.";298    return error;299  }300301  async function handleRestore() {302    if (phase() === "restoring") return;303    const pw = passphrase().trim();304    if (!pw) {305      setRestoreError("enter your master password.");306      return;307    }308309    setPhase("restoring");310    setRestoreError(null);311312    let payload = pendingPayload();313    if (!payload) {314      try {315        payload = await reconstructAndVerify(buffer);316        setPendingPayload(payload);317      } catch (err) {318        const message =319          err instanceof Error320            ? err.message321            : "the scanned codes could not be reassembled.";322        setRestoreError(message);323        setPhase("ready");324        return;325      }326    }327328    const res = (await sendMessage({329      type: "RESTORE_FROM_CODEX",330      payload: {331        vaultBlob: payload.vaultBlob,332        timestamp: payload.timestamp,333        verifyCode: payload.verifyCode,334        vaultFingerprint: payload.vaultFingerprint,335        entryCount: payload.entryCount,336        masterPassphrase: pw,337      },338    })) as {339      ok: boolean;340      data?: { entryCount: number; verifyCode: string };341      error?: string;342    };343344    if (res.ok && res.data) {345      setRestoredCount(res.data.entryCount);346      setPhase("success");347      if (scanner) {348        scanner.stop();349        scanner = null;350      }351      setTimeout(() => props.onRestoreSuccess(), 1500);352    } else {353      setRestoreError(explainRestoreError(res.error));354      setPhase("ready");355    }356  }357358  function progressPercent(): number {359    const ds = dataShards();360    if (!ds || ds <= 0) return 0;361    return Math.min(100, Math.round((scanned() / ds) * 100));362  }363364  return (365    <div class="peach-overlay-view ov-enter-right" style="display:flex">366      <div class="peach-overlay-header">367        <button368          class="peach-btn peach-btn--ghost peach-btn--sm peach-icon-btn"369          onClick={props.onBack}370          aria-label="Back"371        >372          <svg width="7" height="12" viewBox="0 0 7 12" fill="none"373            stroke="currentColor" stroke-width="1.1"374            stroke-linecap="round" stroke-linejoin="round">375            <path d="M6 1L1 6L6 11" />376          </svg>377        </button>378        <span class="peach-overlay-title">restore from codex</span>379        <div class="peach-overlay-spacer"></div>380      </div>381382      <div class="peach-settings-body peach-codex-body">383        <Show when={phase() === "choose"}>384          <div class="peach-codex-restore-choose">385            <h2 class="peach-codex-restore-headline">restore from codex.</h2>386            <p class="peach-codex-restore-sub">387              how do you have your codex?388            </p>389390            <button391              class="peach-codex-restore-option"392              onClick={() => void startCameraScan()}393            >394              <div class="peach-codex-restore-option-icon">395                <svg width="22" height="22" viewBox="0 0 24 24" fill="none"396                  stroke="currentColor" stroke-width="1.5"397                  stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">398                  <path d="M3 8a2 2 0 0 1 2-2h2l1.5-2h7L17 6h2a2 2 0 0 1 2 2v10a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8z" />399                  <circle cx="12" cy="13" r="3.5" />400                </svg>401              </div>402              <div class="peach-codex-restore-option-content">403                <span class="peach-codex-restore-option-title">404                  scan printed pages405                </span>406                <span class="peach-codex-restore-option-sub">407                  point your camera at each code408                </span>409              </div>410            </button>411412            <button413              class="peach-codex-restore-option"414              onClick={() => void openPdfPicker()}415            >416              <div class="peach-codex-restore-option-icon">417                <svg width="22" height="22" viewBox="0 0 24 24" fill="none"418                  stroke="currentColor" stroke-width="1.5"419                  stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">420                  <path d="M14 3H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V8z" />421                  <path d="M14 3v5h5" />422                  <path d="M9 14h6" />423                  <path d="M9 17h4" />424                </svg>425              </div>426              <div class="peach-codex-restore-option-content">427                <span class="peach-codex-restore-option-title">428                  import PDF file429                </span>430                <span class="peach-codex-restore-option-sub">431                  select your codex PDF from a USB drive or folder432                </span>433              </div>434            </button>435436            <input437              ref={(el) => (pdfFileInput = el)}438              type="file"439              accept=".pdf,application/pdf"440              style={{ display: "none" }}441              onChange={(e) => void handlePDFSelected(e)}442            />443444            <p class="peach-codex-restore-guidance">445              have both the printed pages and the PDF? the PDF import is446              faster and more reliable — use it if you can.447            </p>448449            <Show when={pdfError()}>450              <p class="peach-hint peach-hint-error peach-codex-restore-guidance">451                {pdfError()}452              </p>453            </Show>454          </div>455        </Show>456457        <Show458          when={459            phase() === "scanning" ||460            phase() === "ready" ||461            phase() === "restoring"462          }463        >464          <div class="peach-codex-scanner">465            <video466              ref={(el) => (videoEl = el)}467              class="peach-codex-video"468              autoplay469              playsinline470              muted471            />472            <Show when={cameraError()}>473              <div class="peach-codex-camera-overlay">474                <p class="peach-hint peach-hint-error">{cameraError()}</p>475              </div>476            </Show>477          </div>478        </Show>479480        <Show when={phase() === "pdf-import"}>481          <div class="peach-settings-group peach-codex-pdf-import">482            <p class="peach-codex-restore-headline">reading your codex…</p>483            <Show when={pdfProgress()}>484              {(p) => (485                <>486                  <div class="peach-codex-progress-track">487                    <div488                      class="peach-codex-progress-fill"489                      style={{490                        width: `${Math.round((p().page / p().total) * 100)}%`,491                      }}492                    />493                  </div>494                  <p class="peach-codex-progress-label">495                    page {p().page} of {p().total}496                  </p>497                </>498              )}499            </Show>500          </div>501        </Show>502503        <Show504          when={505            phase() === "scanning" ||506            phase() === "ready" ||507            phase() === "restoring"508          }509        >510          <div class="peach-settings-group peach-codex-progress-group">511            <div class="peach-codex-progress-track">512              <div513                class="peach-codex-progress-fill"514                style={{ width: `${progressPercent()}%` }}515              />516            </div>517            <p class="peach-codex-progress-label">518              <Show519                when={totalShards() !== null}520                fallback={<span>{scanned()} codes scanned</span>}521              >522                <span>523                  {scanned()} / {dataShards()} codes524                </span>525              </Show>526              <Show when={verifyCode()}>527                <span class="peach-codex-verify-tag">528                  {verifyCode()}529                </span>530              </Show>531            </p>532            <p class="peach-codex-hint">{hint()}</p>533            <Show when={scanWarning()}>534              <p class="peach-hint peach-hint--warning peach-codex-warning">535                {scanWarning()}536              </p>537            </Show>538          </div>539        </Show>540541        <Show when={phase() === "ready" || phase() === "restoring"}>542          <div class="peach-settings-group peach-codex-passphrase-group">543            <label class="peach-settings-label" for="codex-passphrase">544              master password545            </label>546            <input547              id="codex-passphrase"548              type="password"549              class="peach-underline-input"550              autocomplete="current-password"551              autocorrect="off"552              autocapitalize="none"553              spellcheck={false}554              disabled={phase() === "restoring"}555              value={passphrase()}556              onInput={(e) => {557                setPassphrase((e.target as HTMLInputElement).value);558                if (restoreError()) setRestoreError(null);559              }}560              onKeyDown={(e) => {561                if (e.key === "Enter" && phase() === "ready") {562                  void handleRestore();563                }564              }}565            />566            <Show when={restoreError()}>567              <p class="peach-hint peach-hint-error">{restoreError()}</p>568            </Show>569            <button570              class="peach-btn peach-btn--accent peach-btn--md peach-btn--full"571              disabled={phase() === "restoring" || passphrase().length === 0}572              onClick={() => void handleRestore()}573            >574              {phase() === "restoring" ? "restoring…" : "restore vault"}575            </button>576          </div>577        </Show>578579        <Show when={phase() === "success"}>580          <div class="peach-settings-group peach-codex-done">581            <p class="peach-hint peach-hint--success">✓ vault restored</p>582            <p class="peach-codex-meta">583              {restoredCount()}{" "}584              {restoredCount() === 1 ? "entry" : "entries"} recovered.585            </p>586            <p class="peach-codex-footnote">587              your codex has been read and your vault is unlocked.588            </p>589          </div>590        </Show>591592        <Show when={phase() !== "success"}>593          <button594            class="peach-btn peach-btn--ghost peach-btn--sm peach-btn--full peach-codex-cancel-btn"595            onClick={props.onBack}596          >597            cancel598          </button>599        </Show>600      </div>601    </div>602  );603}