From 1b6e3ec7e22a769af8d82bfa39968bfe7fc41883 Mon Sep 17 00:00:00 2001
From: seb <sebgreenbus@gmail.com>
Date: Mon, 21 Sep 2026 04:30:11 +0200
Subject: [PATCH] inspector

---
 src/devtools/AutomatInspector.jsx | 537 ++++++++++++++++++++++++++++++
 src/main.jsx                      |  12 +
 2 files changed, 549 insertions(+)
 create mode 100644 src/devtools/AutomatInspector.jsx

diff --git a/src/devtools/AutomatInspector.jsx b/src/devtools/AutomatInspector.jsx
new file mode 100644
index 0000000..7254d1f
--- /dev/null
+++ b/src/devtools/AutomatInspector.jsx
@@ -0,0 +1,537 @@
+import { PureComponent } from 'react';
+import Badge from '@mui/material/Badge';
+import Box from '@mui/material/Box';
+import ButtonBase from '@mui/material/ButtonBase';
+import Chip from '@mui/material/Chip';
+import Drawer from '@mui/material/Drawer';
+import Fab from '@mui/material/Fab';
+import IconButton from '@mui/material/IconButton';
+import Stack from '@mui/material/Stack';
+import TextField from '@mui/material/TextField';
+import Tooltip from '@mui/material/Tooltip';
+import Typography from '@mui/material/Typography';
+import BugReportIcon from '@mui/icons-material/BugReport';
+import ChevronRightIcon from '@mui/icons-material/ChevronRight';
+import CloseIcon from '@mui/icons-material/Close';
+import ContentCopyIcon from '@mui/icons-material/ContentCopy';
+import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
+import RefreshIcon from '@mui/icons-material/Refresh';
+import UnfoldLessIcon from '@mui/icons-material/UnfoldLess';
+import UnfoldMoreIcon from '@mui/icons-material/UnfoldMore';
+import { enqueueSnackbar } from 'notistack';
+import { notifyError } from '../utils/notify';
+
+/**
+ * Dev-only overlay that lists every Automat registered in the
+ * `window.__AUTOMATS__` registry (react-automat writes named instances there).
+ *
+ * Loaded exclusively through a `import.meta.env.DEV` guarded dynamic import in
+ * `main.jsx`, so the module never reaches the production bundle.
+ */
+
+/** Registry polling interval in ms; lazy automats (`delivery-<id>`) appear over time. */
+const REGISTRY_POLL_MS = 2000;
+
+/** Serialization limits so huge states stay renderable. */
+const MAX_DEPTH = 6;
+const MAX_STRING = 1500;
+const MAX_ITEMS = 50;
+
+/**
+ * Live registry view. Named automats register themselves in the constructor,
+ * so the map may be absent until the first one is created.
+ *
+ * @returns {Map<string, import('react-automat').Automat>} Registered automats.
+ */
+function getRegistry() {
+  const registry = window.__AUTOMATS__;
+  return registry instanceof Map ? registry : new Map();
+}
+
+/**
+ * Quotes a string and truncates oversized values.
+ *
+ * @param {string} text Value to quote.
+ * @returns {string} Quoted, possibly truncated string.
+ */
+function quote(text) {
+  if (text.length <= MAX_STRING) return JSON.stringify(text);
+  const rest = text.length - MAX_STRING;
+  return `${JSON.stringify(text.slice(0, MAX_STRING))} … (+${rest} Zeichen)`;
+}
+
+/**
+ * Renders `entries` as an indented block.
+ *
+ * @param {string} open Opening bracket.
+ * @param {string} close Closing bracket.
+ * @param {Array<string>} entries Already serialized entries.
+ * @param {string} pad Indentation of the enclosing level.
+ * @returns {string} Indented block.
+ */
+function block(open, close, entries, pad) {
+  if (entries.length === 0) return `${open}${close}`;
+  const body = entries.map((entry) => `${pad}  ${entry}`).join(',\n');
+  return `${open}\n${body}\n${pad}${close}`;
+}
+
+/**
+ * Serializes an arbitrary state value for display. Handles functions, blobs,
+ * DOM nodes, maps, sets and circular references, which plain `JSON.stringify`
+ * would drop or throw on.
+ *
+ * @param {*} value Value to serialize.
+ * @param {number} depth Current nesting depth.
+ * @param {WeakSet<object>} ancestors Objects on the current path, for cycle detection.
+ * @param {string} pad Indentation of the current level.
+ * @returns {string} Human-readable representation.
+ */
+function serialize(value, depth, ancestors, pad) {
+  if (value === null) return 'null';
+  if (value === undefined) return 'undefined';
+
+  const type = typeof value;
+  if (type === 'string') return quote(value);
+  if (type === 'number' || type === 'boolean') return String(value);
+  if (type === 'bigint') return `${value}n`;
+  if (type === 'function') return `[Function ${value.name || 'anonym'}]`;
+  if (type === 'symbol') return `[Symbol ${value.description ?? ''}]`;
+  if (type !== 'object') return String(value);
+
+  if (value instanceof Date) return `[Date ${value.toISOString()}]`;
+  if (value instanceof Blob) return `[Blob ${value.size}B ${value.type || 'ohne Typ'}]`;
+  if (value instanceof ArrayBuffer) return `[ArrayBuffer ${value.byteLength}B]`;
+  if (value instanceof Promise) return '[Promise]';
+  if (typeof Node !== 'undefined' && value instanceof Node) return `[Node ${value.nodeName}]`;
+
+  if (ancestors.has(value)) return '[Circular]';
+  if (depth >= MAX_DEPTH) return Array.isArray(value) ? '[Array …]' : '[Object …]';
+
+  ancestors.add(value);
+  try {
+    if (value instanceof Map) {
+      const shown = Array.from(value.entries()).slice(0, MAX_ITEMS);
+      const entries = shown.map(
+        ([k, v]) =>
+          `${serialize(k, depth + 1, ancestors, `${pad}  `)}: ${serialize(v, depth + 1, ancestors, `${pad}  `)}`,
+      );
+      if (value.size > shown.length) entries.push(`${JSON.stringify('…')}: +${value.size - shown.length} weitere`);
+      return block(`Map(${value.size}) {`, '}', entries, pad);
+    }
+
+    if (value instanceof Set) {
+      const shown = Array.from(value.values()).slice(0, MAX_ITEMS);
+      const entries = shown.map((item) => serialize(item, depth + 1, ancestors, `${pad}  `));
+      if (value.size > shown.length) entries.push(`${JSON.stringify('…')}: +${value.size - shown.length} weitere`);
+      return block(`Set(${value.size}) {`, '}', entries, pad);
+    }
+
+    if (Array.isArray(value)) {
+      const shown = value.slice(0, MAX_ITEMS);
+      const entries = shown.map((item) => serialize(item, depth + 1, ancestors, `${pad}  `));
+      if (value.length > shown.length) entries.push(`${JSON.stringify('…')}: +${value.length - shown.length} weitere`);
+      return block('[', ']', entries, pad);
+    }
+
+    const keys = Object.keys(value);
+    const shown = keys.slice(0, MAX_ITEMS);
+    const entries = shown.map(
+      (key) => `${JSON.stringify(key)}: ${serialize(value[key], depth + 1, ancestors, `${pad}  `)}`,
+    );
+    if (keys.length > shown.length) entries.push(`${JSON.stringify('…')}: +${keys.length - shown.length} weitere Schlüssel`);
+
+    const label = value.constructor && value.constructor !== Object ? `${value.constructor.name} ` : '';
+    return block(`${label}{`, '}', entries, pad);
+  } finally {
+    ancestors.delete(value);
+  }
+}
+
+/**
+ * Formats an automat state for the overlay. Serialization failures are surfaced
+ * instead of being swallowed.
+ *
+ * @param {*} value Automat state.
+ * @returns {string} Display text.
+ */
+export function formatState(value) {
+  try {
+    return serialize(value, 0, new WeakSet(), '');
+  } catch (err) {
+    return `[Serialisierung fehlgeschlagen: ${err?.message ?? err}]`;
+  }
+}
+
+/**
+ * Floating dev button plus overlay listing all registered Automats with live
+ * state, readiness flags, subscriber counts and available actions.
+ *
+ * @augments {PureComponent<{}, {open: boolean, names: Array<string>, expanded: Object<string, boolean>, query: string, revision: number}>}
+ */
+class AutomatInspector extends PureComponent {
+  constructor(props) {
+    super(props);
+    this.state = {
+      open: false,
+      names: [],
+      expanded: {},
+      query: '',
+      revision: 0,
+    };
+
+    /** @type {Map<string, () => void>} Unsubscribe functions per automat name. */
+    this.unsubs = new Map();
+    this.frame = null;
+
+    this.handleToggle = this.handleToggle.bind(this);
+    this.handleClose = this.handleClose.bind(this);
+    this.handleRefresh = this.handleRefresh.bind(this);
+    this.handleToggleAll = this.handleToggleAll.bind(this);
+    this.handleToggleEntry = this.handleToggleEntry.bind(this);
+    this.handleQueryChange = this.handleQueryChange.bind(this);
+    this.handleCopy = this.handleCopy.bind(this);
+    this.handleKeyDown = this.handleKeyDown.bind(this);
+    this.syncRegistry = this.syncRegistry.bind(this);
+    this.scheduleUpdate = this.scheduleUpdate.bind(this);
+  }
+
+  componentDidMount() {
+    this.syncRegistry();
+    this.registryTimer = window.setInterval(this.syncRegistry, REGISTRY_POLL_MS);
+    window.addEventListener('keydown', this.handleKeyDown);
+  }
+
+  componentWillUnmount() {
+    window.clearInterval(this.registryTimer);
+    window.removeEventListener('keydown', this.handleKeyDown);
+    this.unsubscribeAll();
+    if (this.frame) cancelAnimationFrame(this.frame);
+  }
+
+  /** Mirrors the registry keys into state and keeps subscriptions in sync. */
+  syncRegistry() {
+    const names = Array.from(getRegistry().keys()).sort((a, b) => a.localeCompare(b));
+    const changed =
+      names.length !== this.state.names.length || names.some((name, i) => name !== this.state.names[i]);
+    if (changed) this.setState({ names });
+    if (this.state.open) this.subscribeToAll();
+  }
+
+  /**
+   * Subscribes to every registered automat so the overlay reflects live state.
+   * Note: subscribing also flushes a pending deferred load of a dirty automat.
+   */
+  subscribeToAll() {
+    const registry = getRegistry();
+    for (const [name, automat] of registry) {
+      if (this.unsubs.has(name)) continue;
+      this.unsubs.set(name, automat.subscribe(() => this.scheduleUpdate()));
+    }
+    for (const [name, unsub] of Array.from(this.unsubs)) {
+      if (!registry.has(name)) {
+        unsub();
+        this.unsubs.delete(name);
+      }
+    }
+  }
+
+  unsubscribeAll() {
+    for (const unsub of this.unsubs.values()) unsub();
+    this.unsubs.clear();
+  }
+
+  /** Coalesces automat notifications into one render per animation frame. */
+  scheduleUpdate() {
+    if (this.frame) return;
+    this.frame = requestAnimationFrame(() => {
+      this.frame = null;
+      this.setState((prev) => ({ revision: prev.revision + 1 }));
+    });
+  }
+
+  handleKeyDown(event) {
+    if (!event.altKey || !event.shiftKey) return;
+    if (event.key?.toLowerCase() !== 'a') return;
+    event.preventDefault();
+    this.handleToggle();
+  }
+
+  handleToggle() {
+    const open = !this.state.open;
+    this.setState({ open });
+    if (open) {
+      this.syncRegistry();
+      this.subscribeToAll();
+    } else {
+      this.unsubscribeAll();
+    }
+  }
+
+  handleClose() {
+    this.setState({ open: false });
+    this.unsubscribeAll();
+  }
+
+  handleRefresh() {
+    this.syncRegistry();
+  }
+
+  handleToggleAll() {
+    const { names, expanded } = this.state;
+    const allExpanded = names.length > 0 && names.every((name) => expanded[name]);
+    this.setState({
+      expanded: allExpanded
+        ? {}
+        : Object.fromEntries(names.map((name) => [name, true])),
+    });
+  }
+
+  /**
+   * @param {string} name Automat name.
+   */
+  handleToggleEntry(name) {
+    this.setState((prev) => ({
+      expanded: { ...prev.expanded, [name]: !prev.expanded[name] },
+    }));
+  }
+
+  /**
+   * @param {React.ChangeEvent<HTMLInputElement>} event Change event.
+   */
+  handleQueryChange(event) {
+    this.setState({ query: event.target.value });
+  }
+
+  /**
+   * Copies the current state of one automat as text.
+   *
+   * @param {string} name Automat name.
+   * @returns {Promise<void>}
+   */
+  async handleCopy(name) {
+    const automat = getRegistry().get(name);
+    if (!automat) return;
+    try {
+      if (!navigator.clipboard?.writeText) {
+        throw new Error('Clipboard API nicht verfügbar (sichere Origin erforderlich).');
+      }
+      await navigator.clipboard.writeText(`${name}\n${formatState(automat.state)}`);
+      enqueueSnackbar(`State von "${name}" kopiert`, { variant: 'success' });
+    } catch (err) {
+      notifyError(err);
+    }
+  }
+
+  /**
+   * Renders one automat entry.
+   *
+   * @param {import('react-automat').Automat} automat Automat instance.
+   * @param {boolean} isExpanded Whether the details are visible.
+   * @returns {React.ReactElement} Entry element.
+   */
+  renderEntry(automat, isExpanded) {
+    const name = automat.name;
+    const actionNames = Object.keys(automat.actions ?? {});
+
+    return (
+      <Box
+        key={name}
+        sx={{
+          border: '1px solid',
+          borderColor: 'divider',
+          borderRadius: 1,
+          bgcolor: 'background.paper',
+          overflow: 'hidden',
+        }}
+      >
+        <ButtonBase
+          component="div"
+          onClick={() => this.handleToggleEntry(name)}
+          sx={{
+            width: '100%',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'flex-start',
+            gap: 1,
+            px: 1,
+            py: 0.75,
+            textAlign: 'left',
+          }}
+        >
+          {isExpanded ? <ExpandMoreIcon fontSize="small" /> : <ChevronRightIcon fontSize="small" />}
+          <Typography
+            variant="body2"
+            noWrap
+            sx={{ fontFamily: 'monospace', fontWeight: 600, flexGrow: 1, minWidth: 0 }}
+          >
+            {name}
+          </Typography>
+          <Chip size="small" variant="outlined" label={`subs ${automat.subscriberCount}`} />
+          <Chip
+            size="small"
+            color={automat.isReady ? 'success' : 'default'}
+            variant={automat.isReady ? 'filled' : 'outlined'}
+            label={automat.isReady ? 'ready' : 'unready'}
+          />
+          {automat.isDirty ? <Chip size="small" color="warning" label="dirty" /> : null}
+        </ButtonBase>
+
+        {isExpanded ? (
+          <Box sx={{ borderTop: '1px solid', borderColor: 'divider', px: 1.25, py: 1 }}>
+            <Stack direction="row" spacing={0.5} useFlexGap flexWrap="wrap" sx={{ mb: 1 }}>
+              {automat.url ? <Chip size="small" variant="outlined" label={`url: ${automat.url}`} /> : null}
+              {automat.persist ? <Chip size="small" variant="outlined" label="persist" /> : null}
+              {automat.error ? (
+                <Chip size="small" color="error" label={`error: ${automat.error?.message ?? automat.error}`} />
+              ) : null}
+            </Stack>
+
+            <Stack direction="row" alignItems="center" spacing={0.5} sx={{ mb: 0.5 }}>
+              <Typography variant="caption" color="text.secondary" sx={{ flexGrow: 1 }}>
+                Aktionen ({actionNames.length})
+              </Typography>
+              <Tooltip title="State als Text kopieren">
+                <IconButton size="small" onClick={() => this.handleCopy(name)}>
+                  <ContentCopyIcon fontSize="small" />
+                </IconButton>
+              </Tooltip>
+            </Stack>
+            <Stack direction="row" spacing={0.5} useFlexGap flexWrap="wrap" sx={{ mb: 1 }}>
+              {actionNames.length === 0 ? (
+                <Typography variant="caption" color="text.secondary">
+                  keine
+                </Typography>
+              ) : (
+                actionNames.map((action) => <Chip key={action} size="small" label={action} />)
+              )}
+            </Stack>
+
+            <Typography variant="caption" color="text.secondary">
+              State
+            </Typography>
+            <Box
+              component="pre"
+              sx={{
+                m: 0,
+                mt: 0.5,
+                p: 1,
+                borderRadius: 1,
+                bgcolor: 'action.hover',
+                fontFamily: 'monospace',
+                fontSize: 11,
+                lineHeight: 1.5,
+                whiteSpace: 'pre-wrap',
+                wordBreak: 'break-word',
+                maxHeight: 320,
+                overflow: 'auto',
+              }}
+            >
+              {formatState(automat.state)}
+            </Box>
+          </Box>
+        ) : null}
+      </Box>
+    );
+  }
+
+  render() {
+    const { open, names, expanded, query } = this.state;
+    const registry = getRegistry();
+    const needle = query.trim().toLowerCase();
+    const entries = names
+      .map((name) => registry.get(name))
+      .filter((automat) => automat && (!needle || automat.name.toLowerCase().includes(needle)));
+    const allExpanded = names.length > 0 && names.every((name) => expanded[name]);
+
+    return (
+      <>
+        <Badge
+          badgeContent={names.length}
+          color="secondary"
+          overlap="circular"
+          invisible={names.length === 0}
+          sx={{ position: 'fixed', right: 16, bottom: 16, zIndex: (theme) => theme.zIndex.modal + 1 }}
+        >
+          <Tooltip title="Automat-Inspector (Alt+Shift+A)">
+            <Fab
+              size="small"
+              color="primary"
+              aria-label="Automat-Inspector umschalten"
+              aria-pressed={open}
+              onClick={this.handleToggle}
+            >
+              <BugReportIcon fontSize="small" />
+            </Fab>
+          </Tooltip>
+        </Badge>
+
+        <Drawer
+          anchor="right"
+          open={open}
+          onClose={this.handleClose}
+          slotProps={{
+            transition: { timeout: 0 },
+            paper: {
+              sx: {
+                width: { xs: '100%', sm: 560 },
+                maxWidth: '100%',
+                display: 'flex',
+                flexDirection: 'column',
+              },
+            },
+          }}
+        >
+          <Stack
+            direction="row"
+            alignItems="center"
+            spacing={1}
+            sx={{ px: 2, py: 1.25, borderBottom: '1px solid', borderColor: 'divider' }}
+          >
+            <BugReportIcon fontSize="small" color="primary" />
+            <Typography variant="subtitle1" sx={{ fontWeight: 600, flexGrow: 1 }}>
+              Automat-Inspector
+            </Typography>
+            <Chip size="small" label={`${names.length} registriert`} />
+            <Tooltip title="Registry neu einlesen">
+              <IconButton size="small" onClick={this.handleRefresh}>
+                <RefreshIcon fontSize="small" />
+              </IconButton>
+            </Tooltip>
+            <Tooltip title={allExpanded ? 'Alle einklappen' : 'Alle ausklappen'}>
+              <IconButton size="small" onClick={this.handleToggleAll}>
+                {allExpanded ? <UnfoldLessIcon fontSize="small" /> : <UnfoldMoreIcon fontSize="small" />}
+              </IconButton>
+            </Tooltip>
+            <Tooltip title="Schließen">
+              <IconButton size="small" onClick={this.handleClose}>
+                <CloseIcon fontSize="small" />
+              </IconButton>
+            </Tooltip>
+          </Stack>
+
+          <Box sx={{ px: 2, py: 1 }}>
+            <TextField
+              size="small"
+              fullWidth
+              placeholder="Name filtern …"
+              value={query}
+              onChange={this.handleQueryChange}
+            />
+          </Box>
+
+          <Box sx={{ flexGrow: 1, minHeight: 0, overflowY: 'auto', px: 1.5, pb: 2 }}>
+            {entries.length === 0 ? (
+              <Typography variant="body2" color="text.secondary" sx={{ p: 2 }}>
+                {names.length === 0 ? 'Kein Automat registriert.' : 'Kein Automat passt zum Filter.'}
+              </Typography>
+            ) : (
+              <Stack spacing={1}>{entries.map((automat) => this.renderEntry(automat, Boolean(expanded[automat.name])))}</Stack>
+            )}
+          </Box>
+        </Drawer>
+      </>
+    );
+  }
+}
+
+export default AutomatInspector;
diff --git a/src/main.jsx b/src/main.jsx
index 82c5f23..4491f5b 100644
--- a/src/main.jsx
+++ b/src/main.jsx
@@ -1,4 +1,5 @@
 import { createRoot } from 'react-dom/client';
+import { lazy, Suspense } from 'react';
 import CssBaseline from '@mui/material/CssBaseline';
 import { ThemeProvider } from '@mui/material/styles';
 import { Provider } from 'react-redux';
@@ -10,6 +11,12 @@ import { store } from './store';
 import { getActiveTheme } from './theme';
 import './index.css';
 
+// Dev-only Automat inspector. The `import.meta.env.DEV` branch is statically
+// eliminated in production builds, so this module never ships to users.
+const AutomatInspector = import.meta.env.DEV
+  ? lazy(() => import('./devtools/AutomatInspector'))
+  : null;
+
 async function clearDevServiceWorker() {
   if (!import.meta.env.DEV || !('serviceWorker' in navigator)) return;
   const regs = await navigator.serviceWorker.getRegistrations();
@@ -36,6 +43,11 @@ createRoot(document.getElementById('root')).render(
         <StorageManagerProvider>
           <AuthBootstrap>
             <App />
+            {AutomatInspector ? (
+              <Suspense fallback={null}>
+                <AutomatInspector />
+              </Suspense>
+            ) : null}
           </AuthBootstrap>
         </StorageManagerProvider>
       </SnackbarProvider>