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<?php |
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/** |
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* OpenStation — Files Heartbeat sync (PHP). |
| 4 |
* |
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* Piggybacks on the existing WordPress Heartbeat tick — the same |
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* channel `presence.php` uses — so connected clients see folder |
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* sharing changes and other users' placement edits inside one |
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* cross-feature poll instead of N parallel ones. |
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* |
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* Wire format. Client sends `openstation_files_subscribe` keyed |
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* to three version markers: |
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* |
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* { |
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* openstation_files_subscribe: { |
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* folderVersions: { '<folderId>': lastSeenUpdatedAtMs, ... }, |
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* placementsVersion: lastSeenUpdatedAtMs, |
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* sharesVersion: lastSeenInvitedAtMs |
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* } |
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* } |
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* |
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* Server responds with deltas + tombstones: |
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* |
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* openstation_files: { |
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* placements: [ <RestPlacementShape> ], // upserts |
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* folders: [ <RestFolderShape> ], // upserts (incl. share-mode flips) |
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* removed: { |
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* placements: [ ids ], |
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* folders: [ ids ] |
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* }, |
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* shares: { |
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* pending: [ <RestShareShape + folderName/ownerId/ownerName/ownerAvatar> ] |
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* }, |
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* serverTimeMs: int, |
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* truncated: bool |
| 35 |
* } |
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* |
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* Truncation kicks in when more than `openstation_files_heartbeat_max_rows` |
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* (default 200) rows match — clients fall back to a full REST |
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* resync. The default cap is per-payload, not per-folder, so a |
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* massive shared folder doesn't starve other folders' deltas. |
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* |
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* @package OpenStation |
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*/ |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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/** |
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* @param array $response Pre-filtered response. |
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* @param array $data Client-sent payload. |
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* @return array |
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*/ |
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function openstation_files_heartbeat_received( $response, $data ) { |
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if ( ! is_array( $response ) ) { |
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$response = array(); |
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} |
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if ( empty( $data['openstation_files_subscribe'] ) || ! is_array( $data['openstation_files_subscribe'] ) ) { |
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return $response; |
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} |
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if ( ! function_exists( 'openstation_is_enabled' ) || ! openstation_is_enabled() ) { |
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return $response; |
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} |
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|
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$sub = $data['openstation_files_subscribe']; |
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$folder_v = isset( $sub['folderVersions'] ) && is_array( $sub['folderVersions'] ) |
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? $sub['folderVersions'] |
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: array(); |
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$plc_v = isset( $sub['placementsVersion'] ) ? (int) $sub['placementsVersion'] : 0; |
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$shr_v = isset( $sub['sharesVersion'] ) ? (int) $sub['sharesVersion'] : 0; |
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|
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$user_id = (int) get_current_user_id(); |
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if ( $user_id <= 0 ) { |
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return $response; |
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} |
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|
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/** |
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* Filter the per-payload row cap. Lower this on slow links |
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* to force REST fallback sooner; raise it for fast-LAN |
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* intranets where a fatter Heartbeat is fine. |
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* |
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* @param int $cap Default 200. |
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*/ |
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$cap = max( 1, (int) apply_filters( 'openstation_files_heartbeat_max_rows', 200 ) ); |
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|
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$response['openstation_files'] = openstation_files_compute_heartbeat_delta( |
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$user_id, |
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$folder_v, |
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$plc_v, |
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$cap, |
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$shr_v |
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); |
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return $response; |
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} |
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add_filter( 'heartbeat_received', 'openstation_files_heartbeat_received', 5, 2 ); |
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|
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/** |
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* Compute the delta payload for a viewer. |
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* |
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* @param int $user_id Viewer. |
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* @param array $folder_versions `{ folderId => lastSeenUpdatedAtMs }`. |
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* @param int $placements_version Last-seen `updated_at_ms` for placements. |
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* @param int $cap Row cap. |
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* @param int $shares_version Last-seen `invited_at_ms` / |
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* `decided_at_ms` for shares. Used to |
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* trim the `shares.pending` payload |
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* to invites the client hasn't seen |
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* yet. Defaults to `0` (deliver all). |
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* @return array |
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*/ |
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function openstation_files_compute_heartbeat_delta( $user_id, $folder_versions, $placements_version, $cap, $shares_version = 0 ) { |
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global $wpdb; |
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|
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$tables = openstation_files_table_names(); |
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$truncated = false; |
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|
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// 1) Visible folders the viewer should know about. We send |
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// the FULL row when its `updated_at_ms` exceeds whatever |
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// the client last saw (or the client doesn't know about |
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// it at all). |
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$visible = openstation_files_get_visible_folders( $user_id ); |
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$folder_upserts = array(); |
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foreach ( $visible as $row ) { |
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$id = (int) $row['id']; |
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$client_ts = isset( $folder_versions[ (string) $id ] ) |
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? (int) $folder_versions[ (string) $id ] |
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: 0; |
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if ( (int) $row['updated_at_ms'] > $client_ts ) { |
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$folder_upserts[] = openstation_files_shape_folder( $row ); |
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if ( count( $folder_upserts ) >= $cap ) { |
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$truncated = true; |
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break; |
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} |
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} |
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} |
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|
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// 2) Placement upserts the viewer can see. We pull anything |
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// written since `placements_version` whose owner is the |
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// viewer (their own desktop) OR which lives in a folder |
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// the viewer can see (shared content). |
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$visible_folder_ids = array_map( |
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static function ( $f ) { |
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return (int) $f['id']; |
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}, |
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$visible |
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); |
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// Always include the desktop root (parent_id=0) for the viewer. |
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$placement_upserts = array(); |
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if ( ! $truncated ) { |
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// Owner-or-visible-folder filter, expressed as a SINGLE |
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// `$wpdb->prepare()` call so every value goes through one |
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// pass of escaping. The earlier shape nested an inner |
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// `$wpdb->prepare(...)` for the WHERE inside an outer |
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// `$wpdb->prepare(...)` for the LIMIT/version — that path |
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// works for `%d` integers in practice but is latent- |
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// dangerous because a `%` in the inner output would be |
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// mis-interpreted by the outer prepare. Single-prepare |
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// keeps the contract clean. |
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// |
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// Active placements only — trashed rows leave the visible |
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// surface via the `removed.placements` channel a few lines |
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// down, NOT as upserts. Without this filter a heartbeat tick |
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// fired right after a soft-trash would resurrect the tile in |
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// the client store. |
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if ( empty( $visible_folder_ids ) ) { |
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$rows = $wpdb->get_results( |
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$wpdb->prepare( |
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"SELECT * FROM {$tables['placements']} |
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WHERE owner_id = %d |
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AND updated_at_ms > %d |
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AND trashed_at_ms IS NULL |
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ORDER BY updated_at_ms ASC |
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LIMIT %d", |
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$user_id, |
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$placements_version, |
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$cap |
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), |
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ARRAY_A |
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); |
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} else { |
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$placeholders = implode( ',', array_fill( 0, count( $visible_folder_ids ), '%d' ) ); |
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$args = array_merge( |
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array( $user_id ), |
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array_map( 'intval', $visible_folder_ids ), |
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array( $placements_version, $cap ) |
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); |
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// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared |
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$rows = $wpdb->get_results( |
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$wpdb->prepare( |
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"SELECT * FROM {$tables['placements']} |
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WHERE ( owner_id = %d OR parent_id IN ($placeholders) ) |
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AND updated_at_ms > %d |
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AND trashed_at_ms IS NULL |
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ORDER BY updated_at_ms ASC |
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LIMIT %d", |
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$args |
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), |
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ARRAY_A |
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); |
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} |
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foreach ( (array) $rows as $row ) { |
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$row = openstation_files_normalize_placement_row( $row ); |
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// Per-placement read gate: shared folder shouldn't |
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// surface a row the viewer's `can_read()` rejects. |
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$file = openstation_resolve_file( $row['file_type'], $row['file_ref'] ); |
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if ( $file && ! $file->can_read( $user_id ) ) { |
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continue; |
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} |
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$placement_upserts[] = openstation_files_shape_placement( $row ); |
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} |
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if ( count( $placement_upserts ) >= $cap ) { |
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$truncated = true; |
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} |
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} |
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|
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// 3) Tombstones since the last placements_version — gives the |
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// client the "this row is gone" signal. |
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$tomb_rows = $wpdb->get_results( |
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$wpdb->prepare( |
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"SELECT kind, ref_id FROM {$tables['tombstones']} WHERE removed_at_ms > %d ORDER BY removed_at_ms ASC LIMIT %d", |
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$placements_version, |
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$cap |
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), |
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ARRAY_A |
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); |
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$removed = array( |
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'placements' => array(), |
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'folders' => array(), |
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); |
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foreach ( (array) $tomb_rows as $row ) { |
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if ( 'folder' === $row['kind'] ) { |
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$removed['folders'][] = (int) $row['ref_id']; |
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} else { |
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$removed['placements'][] = (int) $row['ref_id']; |
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} |
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} |
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|
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// 4) Soft-trash events. Tombstones only fire on hard delete, so |
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// a trashed placement / folder would otherwise stay in the |
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// client store between F5s. Surface every row whose |
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// `trashed_at_ms` is fresher than the client's high-water |
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// mark as a `removed.*` entry. Restoring (clearing |
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// `trashed_at_ms`) bumps `updated_at_ms` and the row will |
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// flow back through `placements` / `folders` upserts above. |
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$trashed_placements = $wpdb->get_col( |
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$wpdb->prepare( |
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"SELECT id FROM {$tables['placements']} |
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WHERE trashed_at_ms IS NOT NULL |
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AND trashed_at_ms > %d |
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ORDER BY trashed_at_ms ASC |
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LIMIT %d", |
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$placements_version, |
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$cap |
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) |
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); |
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foreach ( (array) $trashed_placements as $id ) { |
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$removed['placements'][] = (int) $id; |
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} |
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$trashed_folders = $wpdb->get_col( |
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$wpdb->prepare( |
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"SELECT id FROM {$tables['folders']} |
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WHERE trashed_at_ms IS NOT NULL |
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AND trashed_at_ms > %d |
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ORDER BY trashed_at_ms ASC |
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LIMIT %d", |
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$placements_version, |
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$cap |
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) |
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); |
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foreach ( (array) $trashed_folders as $id ) { |
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$removed['folders'][] = (int) $id; |
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} |
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|
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// 5) Pending share invites for this viewer (across every folder |
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// they're invited to). Owner-side share-status changes flow |
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// through the folder upserts above; this channel is for the |
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// recipient's "you've been invited" placeholder UI. |
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$shares = array(); |
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$sharing_enabled = function_exists( 'openstation_files_sharing_enabled_for' ) |
| 278 |
? openstation_files_sharing_enabled_for( $user_id ) |
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: true; |
| 280 |
if ( $sharing_enabled && function_exists( 'openstation_files_get_pending_shares_for_user' ) ) { |
| 281 |
$pending = openstation_files_get_pending_shares_for_user( $user_id, $shares_version ); |
| 282 |
foreach ( $pending as $row ) { |
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$shape = openstation_files_shape_share( $row ); |
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$folder = openstation_files_get_folder( $row['folder_id'] ); |
| 285 |
if ( $folder ) { |
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$shape['folderName'] = (string) $folder['name']; |
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$shape['ownerId'] = (int) $folder['owner_id']; |
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$owner_user = get_userdata( (int) $folder['owner_id'] ); |
| 289 |
$shape['ownerName'] = $owner_user ? $owner_user->display_name : ''; |
| 290 |
$shape['ownerAvatar'] = $owner_user ? get_avatar_url( $owner_user->ID, array( 'size' => 48 ) ) : ''; |
| 291 |
} |
| 292 |
$shares[] = $shape; |
| 293 |
if ( count( $shares ) >= $cap ) { |
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$truncated = true; |
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break; |
| 296 |
} |
| 297 |
} |
| 298 |
} |
| 299 |
// Pending FILE-share invites ride the same channel. Shapes carry |
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// `targetType: 'file'` + `fileId` / `fileName` so the client |
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// invite banner can branch (folder shapes have no targetType and |
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// default to folder handling). |
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if ( $sharing_enabled && ! $truncated && function_exists( 'openstation_files_get_pending_file_shares_for_user' ) ) { |
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$pending_files = openstation_files_get_pending_file_shares_for_user( $user_id, $shares_version ); |
| 305 |
foreach ( $pending_files as $row ) { |
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$shares[] = openstation_files_shape_file_share( $row ); |
| 307 |
if ( count( $shares ) >= $cap ) { |
| 308 |
$truncated = true; |
| 309 |
break; |
| 310 |
} |
| 311 |
} |
| 312 |
} |
| 313 |
|
| 314 |
// Safety net: a row that is currently being delivered as an |
| 315 |
// upsert (alive) must NOT also appear in `removed.*`. Otherwise |
| 316 |
// the client applies upserts first, then removals, and the |
| 317 |
// alive row disappears every heartbeat tick. |
| 318 |
// |
| 319 |
// This can happen when stale tombstones linger after a |
| 320 |
// soft-trash → restore cycle (e.g. a recipient leaves a shared |
| 321 |
// folder, then re-accepts the invite — the placement row is |
| 322 |
// restored but any tombstones written in error during the trash |
| 323 |
// path stay in the table). Cleaning them up server-side prevents |
| 324 |
// the same client-side glitch on every subsequent tick. |
| 325 |
$upsert_placement_ids = array_map( |
| 326 |
static function ( $p ) { |
| 327 |
return (int) $p['id']; }, |
| 328 |
$placement_upserts |
| 329 |
); |
| 330 |
$upsert_folder_ids = array_map( |
| 331 |
static function ( $f ) { |
| 332 |
return (int) $f['id']; }, |
| 333 |
$folder_upserts |
| 334 |
); |
| 335 |
if ( ! empty( $upsert_placement_ids ) ) { |
| 336 |
$alive_placements = array_flip( $upsert_placement_ids ); |
| 337 |
$removed['placements'] = array_values( |
| 338 |
array_filter( |
| 339 |
$removed['placements'], |
| 340 |
static function ( $id ) use ( $alive_placements ) { |
| 341 |
return ! isset( $alive_placements[ (int) $id ] ); |
| 342 |
} |
| 343 |
) |
| 344 |
); |
| 345 |
// Cleanup: drop any tombstones referring to placement ids |
| 346 |
// that are demonstrably alive in this tick. Bounded by the |
| 347 |
// upsert set so the work is per-tick, not table-wide. |
| 348 |
openstation_files_purge_stale_tombstones( 'placement', $upsert_placement_ids ); |
| 349 |
} |
| 350 |
if ( ! empty( $upsert_folder_ids ) ) { |
| 351 |
$alive_folders = array_flip( $upsert_folder_ids ); |
| 352 |
$removed['folders'] = array_values( |
| 353 |
array_filter( |
| 354 |
$removed['folders'], |
| 355 |
static function ( $id ) use ( $alive_folders ) { |
| 356 |
return ! isset( $alive_folders[ (int) $id ] ); |
| 357 |
} |
| 358 |
) |
| 359 |
); |
| 360 |
openstation_files_purge_stale_tombstones( 'folder', $upsert_folder_ids ); |
| 361 |
} |
| 362 |
|
| 363 |
return array( |
| 364 |
'placements' => $placement_upserts, |
| 365 |
'folders' => $folder_upserts, |
| 366 |
'removed' => $removed, |
| 367 |
'shares' => array( |
| 368 |
'pending' => $shares, |
| 369 |
), |
| 370 |
'serverTimeMs' => openstation_files_now_ms(), |
| 371 |
'truncated' => $truncated, |
| 372 |
); |
| 373 |
} |
| 374 |
|
| 375 |
/** |
| 376 |
* Delete tombstones for refs that are currently alive (still |
| 377 |
* present in the placements / folders table without |
| 378 |
* `trashed_at_ms`). One-shot cleanup of stale rows written by |
| 379 |
* earlier buggy code paths — once removed, the heartbeat no longer |
| 380 |
* surfaces them every tick. |
| 381 |
* |
| 382 |
* @param string $kind 'placement' | 'folder'. |
| 383 |
* @param int[] $ids Ids known to be alive in the current tick. |
| 384 |
*/ |
| 385 |
function openstation_files_purge_stale_tombstones( $kind, $ids ) { |
| 386 |
if ( empty( $ids ) ) { |
| 387 |
return; |
| 388 |
} |
| 389 |
global $wpdb; |
| 390 |
$tables = openstation_files_table_names(); |
| 391 |
$placeholders = implode( ',', array_fill( 0, count( $ids ), '%d' ) ); |
| 392 |
// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared |
| 393 |
$wpdb->query( |
| 394 |
$wpdb->prepare( |
| 395 |
"DELETE FROM {$tables['tombstones']} |
| 396 |
WHERE kind = %s |
| 397 |
AND ref_id IN ($placeholders)", |
| 398 |
array_merge( array( (string) $kind ), array_map( 'intval', $ids ) ) |
| 399 |
) |
| 400 |
); |
| 401 |
} |
| 402 |
|
