Survos Media Bundle

SurvosMediaBundle provides a deterministic, URL‑centric media registry for Symfony applications.

It is intentionally not a media processor. Instead, it:

• Registers media references (URLs or local files)
• Assigns deterministic IDs derived from URLs
• Stores application‑local media metadata
• Syncs with a centralized media server (future step)
• Generates thumbnail URLs via imgproxy‑style patterns (future step)

This mirrors the relationship between babel‑bundle and lingua‑server:

• Applications own their media tables
• A central service owns the binaries and heavy processing

---

Core Concept: Deterministic Media IDs

Every media item has a stable, deterministic ID derived from its URL.

use Survos\MediaBundle\Service\MediaRegistry;

$id = MediaRegistry::idFromUrl('https://example.com/image.jpg');

The algorithm:

• Base64‑encodes the URL
• Converts it to URL‑safe base64
• Removes padding

This is the same philosophy used by imgproxy.

Why this matters

• No database lookups to resolve URLs
• IDs are reversible
• Same URL → same ID across apps
• Safe primary key for Meilisearch

---

Registering Media

The primary entry point is MediaRegistry.

foreach ($data->images as $imageUrl) {
    $media = $mediaRegistry->ensureMedia($imageUrl);
}

Behavior

• Defaults to Photo
• No duplicate URLs
• Bulk‑safe (flush: false)
• No network calls

Local files are also supported:

$media = $mediaRegistry->ensureMedia($uploadedFile);

Local files are assigned a temporary local:// URL until synced.

---

Probing Mediary (Polling Fallback)

When webhook callbacks are unavailable (for example, local dev tunnels are down), poll mediary directly via the bundle service.

use Survos\MediaBundle\Service\MediaBatchDispatcher;

$result = $mediaBatchDispatcher->dispatch('museum', [$url], [
    'callback_url' => 'https://my-app.example/webhook/media',
]);

$assetId = $result->media[0]->mediaKey;
$probe = $mediaBatchDispatcher->probe($assetId);

if ($probe->isComplete()) {
    // use $probe->meta / $probe->context / $probe->ocr / $probe->ai
}

Available methods:

• probe(string $assetId): MediaProbeResult → calls GET /fetch/media/{id}
• probeMany(array $assetIds): array<MediaProbeResult> → calls POST /fetch/media/by-ids

Probe payload includes current workflow state (marking), variants/thumb URLs, metadata, and any OCR/AI context that has been written so far.

CLI helper:

bin/console media:probe 5c4e0c2d6f8a1b9e
bin/console media:probe "https://example.org/image.jpg"
bin/console media:probe --url "upload://sha256/abcd..."

Publishing Claims to Mediary

Apps run AI with survos/ai-workflow-bundle and store tracked metadata as claims. Media publishing should send the image plus selected source/AI/human claims to mediary, while mediary remains responsible for global media access and canonical image URLs. See docs/publishing.md.

---

What This Bundle Does Not Do

• Download media
• Resize images
• Cache thumbnails
• Perform OCR, tagging, or EXIF extraction

Those responsibilities belong to the media server and imgproxy.

---

Status

This bundle is intentionally minimal and evolving.

Next steps include:

• media:sync command
• Provider detection (YouTube, Flickr, etc.)
• Thumbnail URL generation helpers