wardens/dist/wardens.cjs

A framework for resource management

"use strict";var I=Object.defineProperty;var R=(r,e,t)=>e in r?I(r,e,{enumerable:!0,configurable:!0,writable:!0,value:t}):r[e]=t;var f=(r,e,t)=>(R(r,typeof e!="symbol"?e+"":e,t),t),j=(r,e,t)=>{if(!e.has(r))throw TypeError("Cannot "+t)};var n=(r,e,t)=>(j(r,e,"read from private field"),t?t.call(r):e.get(r)),l=(r,e,t)=>{if(e.has(r))throw TypeError("Cannot add the same private member more than once");e instanceof WeakSet?e.add(r):e.set(r,t)},h=(r,e,t,s)=>(j(r,e,"write to private field"),s?s.call(r,t):e.set(r,t),t);Object.defineProperty(exports,Symbol.toStringTag,{value:"Module"});function B(r){const e=new WeakMap;return new Proxy(r,{get(t,s){const o=Reflect.get(t,s,t);if(typeof o=="function"){if(e.has(o)===!1){const a=o.bind(t);Object.defineProperties(a,Object.getOwnPropertyDescriptors(o)),e.set(o,a)}return e.get(o)}return o},set(t,s,o){return Reflect.set(t,s,o,t)}})}const m=new WeakMap,P=new WeakSet;function M(r){return Proxy.revocable(r,{})}var g,w;class x{constructor(e){l(this,g,Symbol("Context ID"));l(this,w,void 0);h(this,w,e)}static getId(e){return n(e,g)}static getDefaultValue(e){var t;return n(t=e,w).call(t)}}g=new WeakMap,w=new WeakMap;const A=r=>new x(r);var y,u,p,i;class T{constructor(e,t,s){l(this,y,new WeakSet);l(this,u,void 0);l(this,p,void 0);l(this,i,void 0);f(this,"create",async(e,...t)=>{if(n(this,p).enforced)throw new Error("Cannot create new resources after teardown.");const s=Object.create(n(this,i)),o=await k(s,e,...t);return n(this,u).add(o),o});f(this,"destroy",async e=>{if(n(this,y).has(e))throw new Error("Resource already destroyed.");if(!n(this,u).has(e))throw new Error("You do not own this resource.");n(this,u).delete(e),n(this,y).add(e),await b(e)});f(this,"setContext",(e,t)=>{n(this,i)[x.getId(e)]=t});f(this,"getContext",e=>{const t=x.getId(e);return t in n(this,i)?n(this,i)[t]:x.getDefaultValue(e)});h(this,i,e),h(this,u,t),h(this,p,s)}}y=new WeakMap,u=new WeakMap,p=new WeakMap,i=new WeakMap;const k=async(r,e,...t)=>{const s={enforced:!1},o=new Set,a=new T(r,o,s);let c;try{c=await e(a,...t)}catch(v){const W=Array.from(o).reverse(),S=(await Promise.allSettled(W.map(d=>a.destroy(d)))).filter(d=>d.status==="rejected");throw S.length?D(S.map(d=>d.reason),{cause:v}):v}const E=c.value,{proxy:C,revoke:O}=M(E);return P.add(C),m.set(C,{curfew:s,resource:c,children:o,revoke:O}),C},b=async r=>{if(!P.has(r))throw new Error("Cannot destroy object. It is not a resource.");const e=m.get(r);if(e){m.delete(r),e.revoke();let t={status:"fulfilled",value:void 0};if(e.resource.destroy)try{await e.resource.destroy()}catch(c){t={status:"rejected",reason:c}}e.curfew.enforced=!0;const s=Array.from(e.children).reverse().map(b),o=await Promise.allSettled(s),a=[t].concat(o).filter(c=>c.status==="rejected");if(a.length)throw D(a.map(c=>c.reason))}},D=(r,e)=>r.length===1?r[0]:new V(r,e);class V extends Error{constructor(e,t){super("Some resources could not be destroyed. See the `failures` property for details.",t),this.failures=e}}const H=async(r,...e)=>k(Object.create(null),r,...e);exports.bindContext=B;exports.create=H;exports.createContext=A;exports.destroy=b;