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Add analytics integration with Horchposten backend

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Implements session-based analytics tracking that sends gameplay
stats to the Horchposten API. Adds stats.{c,h} for accumulating
per-session metrics (kills, deaths, shots, dashes, jumps, pickups,
damage, time) and analytics.{c,h} with EM_JS bridge for fetch()
calls to the backend. Client ID is persisted in localStorage.
Session start/end hooks are wired into all game lifecycle events
(level transitions, restart, quit, tab close via sendBeacon).
Analytics URL/key are configured via data attributes on the canvas
container. Non-WASM builds compile with no-op stubs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
root
2026-03-08 17:11:39 +00:00
parent 4407932a2d
commit a23ecaf4c1
8 changed files with 331 additions and 1 deletions
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25
web/shell.html
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@@ -107,7 +107,9 @@
</style>
</head>
<body>
<div id="canvas-container">
<div id="canvas-container"
data-analytics-url=""
data-analytics-key="">
<canvas class="emscripten" id="canvas" tabindex="1"
width="640" height="360"></canvas>
</div>
@@ -282,6 +284,27 @@
document.title = 'Jump \'n Run - Level Editor';
}
}
/* ── Analytics: end session on tab close ────────────── */
window.addEventListener('beforeunload', function() {
if (typeof Module !== 'undefined' && Module._analyticsSessionId &&
Module._analyticsUrl) {
/* Use sendBeacon for reliability during page unload */
var sid = Module._analyticsSessionId;
var body = JSON.stringify({
score: 0,
level_reached: 1,
lives_used: 0,
duration_seconds: 0,
end_reason: 'quit'
});
var blob = new Blob([body], { type: 'application/json' });
navigator.sendBeacon(
Module._analyticsUrl + '/api/analytics/session/' + sid + '/end/',
blob
);
}
});
</script>
{{{ SCRIPT }}}
</body>