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      // Use the same HTML entrypoint the action popup uses. Reading it187      // from chrome.runtime.getManifest().action.default_popup keeps the188      // path correct across builds (Chrome vs Firefox manifest variants)189      // without hard-coding "src/popup/index.html".190      const popupHtml =191        chrome.runtime.getManifest().action?.default_popup ?? "src/popup/index.html";192      await chrome.windows.create({193        url: chrome.runtime.getURL(`${popupHtml}?codex=pdf`),194        type: "popup",195        width: 460,196        height: 720,197      });198      window.close();199    } catch (err) {200      console.warn("[codex] failed to detach popup for PDF import:", err);201      pdfFileInput?.click();202    }203  }204205  async function handlePDFSelected(e: Event) {206    const input = e.currentTarget as HTMLInputElement;207    const file = input.files?.[0];208    // Reset the input so the same file can be re-selected after an error.209    input.value = "";210    if (!file) return;211212    if (!file.type.includes("pdf") && !file.name.toLowerCase().endsWith(".pdf")) {213      setPdfError("please select a Peach Codex PDF file.");214      return;215    }216217    setPhase("pdf-import");218    setPdfProgress(null);219    setPdfError(null);220221    try {222      // Dynamic import so the popup never pulls pdf.js into the camera-only223      // path — keeps the initial bundle small.224      const { importCodexPDF } = await import("../codex/pdf-import");225      const result = await importCodexPDF(file, (page, total) => {226        setPdfProgress({ page, total });227      });228229      if (result.envelopes.length === 0) {230        setPdfError(231          "no Codex codes found in this PDF. make sure you're selecting a Peach Codex PDF, not a different document.",232        );233        setPhase("choose");234        return;235      }236237      for (const envelope of result.envelopes) {238        await buffer.add(envelope);239      }240      refreshFromBuffer();241242      if (!buffer.isReady()) {243        // Some codes are missing — let the user supplement with the camera.244        setPdfError(245          `found ${buffer.size()}${246            result.totalExpected ? ` of ${result.totalExpected}` : ""247          } codes. the PDF may be incomplete — you can scan the remaining codes with your camera.`,248        );249        await startCameraScan();250      }251    } catch (err) {252      setPdfError(253        `failed to read PDF: ${err instanceof Error ? err.message : String(err)}`,254      );255      setPhase("choose");256    }257  }258259  // Detect whether we are running inside a chrome.windows.create() window260  // that was opened specifically to handle the PDF picker. The action261  // popup dismisses on focus loss, so the file dialog tears it down. When262  // routed via ?codex=pdf we know we are in a survivable window and can263  // safely auto-trigger the picker on mount.264  const autoPickPdf = (() => {265    try {266      return new URLSearchParams(window.location.search).get("codex") === "pdf";267    } catch {268      return false;269    }270  })();271272  onMount(() => {273    if (autoPickPdf) {274      // Tiny delay so the click happens after the SolidJS mount settles275      // and the hidden <input> is in the DOM.276      setTimeout(() => pdfFileInput?.click(), 50);277    }278  });279280  onCleanup(() => {281    if (scanner) {282      scanner.stop();283      scanner = null;284    }285    // `scanner.stop()` calls reader.reset(), which tears down the286    // MediaStream attached to the <video> element. Defensive: clear srcObject287    // in case the library leaves a reference behind after reset (observed in288    // older @zxing/library versions).289    if (videoEl?.srcObject) {290      const stream = videoEl.srcObject as MediaStream;291      stream.getTracks().forEach((t) => t.stop());292      videoEl.srcObject = null;293    }294  });295296  function explainRestoreError(error: string | undefined): string {297    if (!error) return "restoration failed. please try again.";298    if (error.includes("WRONG_PASSPHRASE") || error.includes("wrong"))299      return "wrong master password. try again.";300    if (error.includes("INVALID_VAULT_BLOB"))301      return "the reconstructed vault is unreadable. please re-scan the Codex.";302    if (error.includes("FINGERPRINT_MISMATCH"))303      return "vault integrity check failed. please re-scan the Codex.";304    return error;305  }306307  async function handleRestore() {308    if (phase() === "restoring") return;309    const pw = passphrase().trim();310    if (!pw) {311      setRestoreError("enter your master password.");312      return;313    }314315    setPhase("restoring");316    setRestoreError(null);317318    let payload = pendingPayload();319    if (!payload) {320      try {321        payload = await reconstructAndVerify(buffer);322        setPendingPayload(payload);323      } catch (err) {324        const message =325          err instanceof Error326            ? err.message327            : "the scanned codes could not be reassembled.";328        setRestoreError(message);329        setPhase("ready");330        return;331      }332    }333334    const res = (await sendMessage({335      type: "RESTORE_FROM_CODEX",336      payload: {337        vaultBlob: payload.vaultBlob,338        timestamp: payload.timestamp,339        verifyCode: payload.verifyCode,340        vaultFingerprint: payload.vaultFingerprint,341        entryCount: payload.entryCount,342        masterPassphrase: pw,343      },344    })) as {345      ok: boolean;346      data?: { entryCount: number; verifyCode: string };347      error?: string;348    };349350    if (res.ok && res.data) {351      setRestoredCount(res.data.entryCount);352      setPhase("success");353      if (scanner) {354        scanner.stop();355        scanner = null;356      }357      setTimeout(() => props.onRestoreSuccess(), 1500);358    } else {359      setRestoreError(explainRestoreError(res.error));360      setPhase("ready");361    }362  }363364  function progressPercent(): number {365    const ds = dataShards();366    if (!ds || ds <= 0) return 0;367    return Math.min(100, Math.round((scanned() / ds) * 100));368  }369370  return (371    <div class="peach-overlay-view ov-enter-right" style="display:flex">372      <div class="peach-overlay-header">373        <button374          class="peach-btn peach-btn--ghost peach-btn--sm peach-icon-btn"375          onClick={props.onBack}376          aria-label="Back"377        >378          <svg width="7" height="12" viewBox="0 0 7 12" fill="none"379            stroke="currentColor" stroke-width="1.1"380            stroke-linecap="round" stroke-linejoin="round">381            <path d="M6 1L1 6L6 11" />382          </svg>383        </button>384        <span class="peach-overlay-title">restore from codex</span>385        <div class="peach-overlay-spacer"></div>386      </div>387388      <div class="peach-settings-body peach-codex-body">389        <Show when={phase() === "choose"}>390          <div class="peach-codex-restore-choose">391            <h2 class="peach-codex-restore-headline">restore from codex.</h2>392            <p class="peach-codex-restore-sub">393              how do you have your codex?394            </p>395396            <button397              class="peach-codex-restore-option"398              onClick={() => void startCameraScan()}399            >400              <div class="peach-codex-restore-option-icon">401                <svg width="22" height="22" viewBox="0 0 24 24" fill="none"402                  stroke="currentColor" stroke-width="1.5"403                  stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">404                  <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" />405                  <circle cx="12" cy="13" r="3.5" />406                </svg>407              </div>408              <div class="peach-codex-restore-option-content">409                <span class="peach-codex-restore-option-title">410                  scan printed pages411                </span>412                <span class="peach-codex-restore-option-sub">413                  point your camera at each code414                </span>415              </div>416            </button>417418            <button419              class="peach-codex-restore-option"420              onClick={() => void openPdfPicker()}421            >422              <div class="peach-codex-restore-option-icon">423                <svg width="22" height="22" viewBox="0 0 24 24" fill="none"424                  stroke="currentColor" stroke-width="1.5"425                  stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">426                  <path d="M14 3H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V8z" />427                  <path d="M14 3v5h5" />428                  <path d="M9 14h6" />429                  <path d="M9 17h4" />430                </svg>431              </div>432              <div class="peach-codex-restore-option-content">433                <span class="peach-codex-restore-option-title">434                  import PDF file435                </span>436                <span class="peach-codex-restore-option-sub">437                  select your codex PDF from a USB drive or folder438                </span>439              </div>440            </button>441442            <input443              ref={(el) => (pdfFileInput = el)}444              type="file"445              accept=".pdf,application/pdf"446              style={{ display: "none" }}447              onChange={(e) => void handlePDFSelected(e)}448            />449450            <p class="peach-codex-restore-guidance">451              have both the printed pages and the PDF? the PDF import is452              faster and more reliable — use it if you can.453            </p>454455            <Show when={pdfError()}>456              <p class="peach-hint peach-hint-error peach-codex-restore-guidance">457                {pdfError()}458              </p>459            </Show>460          </div>461        </Show>462463        <Show464          when={465            phase() === "scanning" ||466            phase() === "ready" ||467            phase() === "restoring"468          }469        >470          <div class="peach-codex-scanner">471            <video472              ref={(el) => (videoEl = el)}473              class="peach-codex-video"474              autoplay475              playsinline476              muted477            />478            <Show when={cameraError()}>479              <div class="peach-codex-camera-overlay">480                <p class="peach-hint peach-hint-error">{cameraError()}</p>481              </div>482            </Show>483          </div>484        </Show>485486        <Show when={phase() === "pdf-import"}>487          <div class="peach-settings-group peach-codex-pdf-import">488            <p class="peach-codex-restore-headline">reading your codex…</p>489            <Show when={pdfProgress()}>490              {(p) => (491                <>492                  <div class="peach-codex-progress-track">493                    <div494                      class="peach-codex-progress-fill"495                      style={{496                        width: `${Math.round((p().page / p().total) * 100)}%`,497                      }}498                    />499                  </div>500                  <p class="peach-codex-progress-label">501                    page {p().page} of {p().total}502                  </p>503                </>504              )}505            </Show>506          </div>507        </Show>508509        <Show510          when={511            phase() === "scanning" ||512            phase() === "ready" ||513            phase() === "restoring"514          }515        >516          <div class="peach-settings-group peach-codex-progress-group">517            <div class="peach-codex-progress-track">518              <div519                class="peach-codex-progress-fill"520                style={{ width: `${progressPercent()}%` }}521              />522            </div>523            <p class="peach-codex-progress-label">524              <Show525                when={totalShards() !== null}526                fallback={<span>{scanned()} codes scanned</span>}527              >528                <span>529                  {scanned()} / {dataShards()} codes530                </span>531              </Show>532              <Show when={verifyCode()}>533                <span class="peach-codex-verify-tag">534                  {verifyCode()}535                </span>536              </Show>537            </p>538            <p class="peach-codex-hint">{hint()}</p>539            <Show when={scanWarning()}>540              <p class="peach-hint peach-hint--warning peach-codex-warning">541                {scanWarning()}542              </p>543            </Show>544          </div>545        </Show>546547        <Show when={phase() === "ready" || phase() === "restoring"}>548          <div class="peach-settings-group peach-codex-passphrase-group">549            <label class="peach-settings-label" for="codex-passphrase">550              master password551            </label>552            <input553              id="codex-passphrase"554              type="password"555              class="peach-underline-input"556              autocomplete="current-password"557              autocorrect="off"558              autocapitalize="none"559              spellcheck={false}560              disabled={phase() === "restoring"}561              value={passphrase()}562              onInput={(e) => {563                setPassphrase((e.target as HTMLInputElement).value);564                if (restoreError()) setRestoreError(null);565              }}566              onKeyDown={(e) => {567                if (e.key === "Enter" && phase() === "ready") {568                  void handleRestore();569                }570              }}571            />572            <Show when={restoreError()}>573              <p class="peach-hint peach-hint-error">{restoreError()}</p>574            </Show>575            <button576              class="peach-btn peach-btn--accent peach-btn--md peach-btn--full"577              disabled={phase() === "restoring" || passphrase().length === 0}578              onClick={() => void handleRestore()}579            >580              {phase() === "restoring" ? "restoring…" : "restore vault"}581            </button>582          </div>583        </Show>584585        <Show when={phase() === "success"}>586          <div class="peach-settings-group peach-codex-done">587            <p class="peach-hint peach-hint--success">✓ vault restored</p>588            <p class="peach-codex-meta">589              {restoredCount()}{" "}590              {restoredCount() === 1 ? "entry" : "entries"} recovered.591            </p>592            <p class="peach-codex-footnote">593              your codex has been read and your vault is unlocked.594            </p>595          </div>596        </Show>597598        <Show when={phase() !== "success"}>599          <button600            class="peach-btn peach-btn--ghost peach-btn--sm peach-btn--full peach-codex-cancel-btn"601            onClick={props.onBack}602          >603            cancel604          </button>605        </Show>606      </div>607    </div>608  );609}