eve/dist/src/execution/session-delivery-hook.js

Filesystem-first framework for durable backend AI agents that run anywhere.

import{createHook}from"#compiled/@workflow/core/index.js";import{claimHookOwnership,disposeHook}from"#execution/hook-ownership.js";function createSessionDeliveryHook(r){let i,a=[],o=[],s=0,c=null,l,u,enqueue=e=>{o.push(e),o.sort((e,t)=>e.order-t.order),u?.(),u=void 0},arm=e=>{e.closed||e.pending||(e.pending=!0,e.resolved=void 0,(e.retired?Promise.resolve(e.hook).then(e=>({done:!1,value:e})):e.iterator.next()).then(t=>{let n={order:s++,result:t,state:e};e.resolved=n,e.enabled&&enqueue(n)},()=>{}))},enable=e=>{e.enabled=!0,e.resolved!==void 0&&enqueue(e.resolved)},drainReady=async()=>{if(c===null)for(await Promise.resolve();o.length>0;){let e=o.shift();e.state.pending=!1,e.state.resolved=void 0,e.result.done?e.state.closed=!0:e.result.value.kind===`deliver`&&r.push(e.result.value),arm(e.state),await Promise.resolve()}};return{consumeNext(){if(l===void 0)throw Error(`Cannot consume a public delivery before it resolves.`);l.state.pending=!1,l.state.resolved=void 0,l.result.done&&(l.state.closed=!0),l=void 0,c=null},async dispose(){i!==void 0&&(await disposeHook(i.hook),i=void 0)},next(){if(i===void 0)throw Error(`Cannot wait for deliveries before a continuation token is available.`);if(c!==null)return c;arm(i);for(let e of a)arm(e);return i.closed&&a.every(e=>e.closed)?(l={order:s++,result:{done:!0,value:void 0},state:i},c=Promise.resolve(l.result),c):(c=(async()=>{for(;o.length===0;)await new Promise(e=>{u=e});let e=o.shift();return l=e,e.result})(),c)},async rekey(r){if(!r||i?.hook.token===r)return;let o=createHook({token:r}),s={closed:!1,enabled:!1,hook:o,iterator:o[Symbol.asyncIterator](),pending:!1,retired:!1};if(i===void 0){await claimHookOwnership(s.hook),enable(s),i=s;return}let c=i;arm(c),arm(s),await claimHookOwnership(s.hook),enable(s),await drainReady();try{await disposeHook(c.hook)}catch(e){i=void 0;try{await disposeHook(s.hook)}catch{}throw e}c.retired=!0,a.push(c),i=s,await drainReady()}}}export{createSessionDeliveryHook};