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feat: implement Pocketbook — a Clojure-native synced atom

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Offline-first key-value store with atom interface (swap!, deref,
add-watch) that syncs to a SQLite-backed server over Transit.

Server (CLJ):
- SQLite storage with Nippy serialization preserving all Clojure types
- GET /sync?group=G&since=T pull endpoint with prefix-based groups
- POST /sync push endpoint with per-document version checking
- Conflict detection (stale write rejection)
- Token-based auth with per-user group access
- CORS support, soft deletes, purge compaction

Client (CLJS):
- IndexedDB wrapper with Transit serialization
- SyncedAtom implementing IAtom (IDeref, ISwap, IReset, IWatchable)
- Write-through to IndexedDB on every swap!
- Background sync loop (pull + push) with configurable interval
- Online/offline detection with reconnect sync
- Conflict resolution (accept server value)
- ready? channel for initial load
- Custom cache atom support (Reagent ratom compatible)

25 tests, 77 assertions across db, transit, server, and auth.
This commit is contained in:
Florian Schroedl
2026-04-04 16:33:14 +02:00
commit 55cddf751b
16 changed files with 1736 additions and 0 deletions
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Pocketbook Example</title>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, system-ui, sans-serif; max-width: 600px; margin: 2rem auto; padding: 0 1rem; color: #1a1a1a; }
h1 { margin-bottom: 1rem; font-size: 1.5rem; }
#add-form { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
#add-form input { flex: 1; padding: 0.5rem; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; }
#add-form button { padding: 0.5rem 1rem; background: #2563eb; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 1rem; }
#add-form button:hover { background: #1d4ed8; }
ul { list-style: none; }
li { padding: 0.5rem 0; border-bottom: 1px solid #eee; display: flex; align-items: center; justify-content: space-between; }
label { display: flex; align-items: center; gap: 0.5rem; flex: 1; }
.del-btn { background: none; border: none; color: #ef4444; cursor: pointer; font-size: 1.1rem; padding: 0 0.25rem; }
.del-btn:hover { color: #dc2626; }
</style>
</head>
<body>
<div id="app">Loading...</div>
<script src="js/out/goog/base.js"></script>
<script src="js/main.js"></script>
</body>
</html>