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/** |
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* ZipWP MCP — pure js_rpc dispatch-dedup decision (B-1 / P5). |
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* |
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* The bridge's executeTools loop owns the seen-map I/O (sessionStorage-backed, |
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* FIFO-bounded). THIS module is the pure DECISION over a prior seen entry, so the |
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* idempotency logic — the silent-until-it-bites duplicate-content path — is |
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* unit-tested instead of living only inline in the browser IIFE. |
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* |
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* Decisions, given the prior _rpcSeen entry for a js_rpc call_id (or undefined): |
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* - a prior entry (IN-FLIGHT or COMPLETED) → repost_cached: NEVER re-dispatch |
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* (re-running the handler double-applies the mutation); re-POST the stored |
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* reply so a still-waiting brain BRPOP resolves. |
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* - no prior entry → run: the caller records IN_FLIGHT_MARKER BEFORE the handler |
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* mutates the tree, so a crash BETWEEN the mutation and the completion-record |
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* still leaves a marker. A replay then reposts an uncertain (ok:false) reply |
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* and the brain verifies with get_context before any retry — never a blind |
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* re-dispatch. |
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* |
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* Dual-mode: window.zipwpRpcDedup in the browser; CommonJS for jest. |
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* |
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* @package |
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*/ |
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( function () { |
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'use strict'; |
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|
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// The reply a replay receives while the first run is mid-apply, or after a |
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// crash before the completion-record. ok:false → the brain treats it as an |
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// unconfirmed apply (verify-before-retry), never a blind re-apply. |
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const IN_FLIGHT_MARKER = { ok: false, data: undefined, error: 'apply_pending_no_confirmation' }; |
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|
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// A COMPLETED session-scoped write (apply_change / set_scripts — both mutate |
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// block attributes in the OPEN editor session) cached on a PRIOR page load: the |
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// page reloaded since, and Gutenberg DISCARDS unsaved session edits on reload. |
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// The cached ok:true would then mask a LOST edit (the brain folds success while |
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// the page reverted). Repost this uncertain reply so the brain re-verifies with |
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// get_context instead — same "don't assume, verify" contract as IN_FLIGHT. |
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const RELOAD_REVERIFY_MARKER = { ok: false, data: undefined, error: 'apply_unconfirmed_after_reload' }; |
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|
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// `currentPageLoadId` is the token minted once per page load. A cached entry |
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// tagged `mutating` (a session-scoped write) whose `pageLoadId` differs means a |
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// reload happened between the apply and this replay → the edit is gone. |
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function decideJsRpcDispatch( seenEntry, currentPageLoadId ) { |
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if ( seenEntry ) { |
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if ( seenEntry.mutating === true && |
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currentPageLoadId !== undefined && currentPageLoadId !== null && |
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seenEntry.pageLoadId !== undefined && |
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seenEntry.pageLoadId !== currentPageLoadId ) { |
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return { action: 'repost_cached', reply: RELOAD_REVERIFY_MARKER }; |
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} |
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return { action: 'repost_cached', reply: seenEntry }; |
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} |
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return { action: 'run', inFlightMarker: IN_FLIGHT_MARKER }; |
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} |
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|
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if ( typeof window !== 'undefined' ) { |
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window.zipwpRpcDedup = window.zipwpRpcDedup || {}; |
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window.zipwpRpcDedup.decideJsRpcDispatch = decideJsRpcDispatch; |
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window.zipwpRpcDedup.IN_FLIGHT_MARKER = IN_FLIGHT_MARKER; |
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window.zipwpRpcDedup.RELOAD_REVERIFY_MARKER = RELOAD_REVERIFY_MARKER; |
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} |
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if ( typeof module !== 'undefined' && module.exports ) { |
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module.exports = { |
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decideJsRpcDispatch, |
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IN_FLIGHT_MARKER, |
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RELOAD_REVERIFY_MARKER, |
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}; |
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} |
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}() ); |
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|
