[{"_1":2,"_168":-5,"_169":-5},"loaderData",{"_3":4,"_91":92},"root",{"_5":6,"_34":35,"_64":65},"ctx",{"_7":8,"_23":-5,"_24":25,"_26":27,"_28":20,"_29":20,"_30":20,"_31":32,"_33":20},"auth",{"_9":-5,"_10":-5,"_11":-5,"_12":-5,"_13":-5,"_14":-5,"_15":-5,"_16":-5,"_17":-5,"_18":-5,"_19":20,"_21":22},"sessionClaims","sessionId","sessionStatus","userId","actor","orgId","orgRole","orgSlug","orgPermissions","factorVerificationAge","isAuthenticated",false,"tokenType","session_token","user","preferencesKeybindings","default","preferencesTheme","light","preferencesFixers","preferencesCopilot","preferencesSelectionAi","notificationCount",0,"flagDenols","ENV",{"_36":37,"_38":39,"_40":41,"_42":43,"_44":45,"_46":47,"_48":49,"_50":51,"_52":53,"_54":55,"_56":57,"_58":59,"_60":61,"_62":63},"REACT_APP_SENTRY_DSN","https://586020d86f05489db63a554690acf1e9@o1398359.ingest.sentry.io/6724499","VAL_RUNTIME_NAME","prod","RENDER_GIT_COMMIT","5f86047c78fbcbbdc94436f811a86add7eaf8c7a","RENDER_GIT_BRANCH","main","CLERK_PUBLISHABLE_KEY","pk_live_Y2xlcmsudmFsLnRvd24k","POSTHOG_API_TOKEN","phc_nmoyuAkStEZuUp69rYlg1DZgrIt19Gx0Y4Hwf8tGgJP","POSTHOG_API_HOST","https://wart.val.town","WEB_API_TEMPLATE","https://{val}.web.val.run","APP_URL","https://www.val.town","MODULE_URL","https://esm.town","VANITY_WEB_API_TEMPLATE","https://{label}.val.run/","DENOLS_URL","https://lsp.val.town","NODE_ENV","production","API_URL","https://api.val.town","clerkState",{"_66":67},"__internal_clerk_state",{"_68":69,"_70":45,"_71":72,"_73":72,"_74":20,"_75":72,"_76":72,"_77":72,"_78":72,"_79":80,"_89":20,"_90":20},"__clerk_ssr_state",{"_21":22,"_9":-5,"_10":-5,"_11":-5,"_12":-5,"_13":-5,"_14":-5,"_15":-5,"_16":-5,"_17":-5,"_18":-5,"_19":20},"__publishableKey","__proxyUrl","","__domain","__isSatellite","__signInUrl","__signUpUrl","__afterSignInUrl","__afterSignUpUrl","__clerk_debug",{"_81":20,"_19":20,"_82":72,"_83":84,"_85":72,"_86":45,"_87":20,"_88":72},"isSignedIn","proxyUrl","reason","session-token-and-uat-missing","message","publishableKey","isSatellite","domain","__telemetryDisabled","__telemetryDebug","routes/embed.x.$handle.$name.$",{"_93":94,"_95":96,"_97":98,"_99":100,"_147":148,"_165":166,"_167":-5},"handle","postpostscript","name","interruptibleChain","path","main.tsx","project",{"_101":102,"_95":96,"_103":104,"_105":-5,"_106":107,"_108":109,"_110":-5,"_111":-5,"_12":112,"_113":-5,"_114":107,"_115":-5,"_116":32,"_14":117,"_118":119,"_120":119,"_121":122,"_123":122,"_124":122,"_125":119,"_126":119,"_23":127,"_130":131,"_133":134,"_146":20},"id","f24f84c0-275f-11f0-86ff-569c3dd06744","createdAt",["D",1746195348913],"deletedAt","legacyEnvVars",true,"privacy","public","description","imageUrl","4bfb99a9-2008-40e0-bacb-7c7d84227cee","pinnedFileId","pinPreview","screenshotVersion","likeCount","1073b191-f665-405d-9530-545465c93575","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm",{"_93":94,"_128":129},"profileImageUrl","https://img.clerk.com/eyJ0eXBlIjoicHJveHkiLCJzcmMiOiJodHRwczovL2ltYWdlcy5jbGVyay5kZXYvdXBsb2FkZWQvaW1nXzJjdlhaRXl0WXVNSlhZcWU0ckI2c1BOMjNhQSJ9","org",{"_93":94,"_132":129},"avatar","branch",{"_135":136,"_95":43,"_101":137,"_138":102,"_139":-5,"_140":-5,"_141":-5,"_142":-5,"_143":-5,"_144":96,"_145":94},"version",3,"f24fd81c-275f-11f0-86ff-569c3dd06744","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","isOwned","file",{"_101":149,"_95":98,"_150":151,"_152":-5,"_153":137,"_154":136,"_155":107,"_103":156,"_135":157,"_158":159,"_160":161,"_162":20,"_163":-5,"_97":164},"f25ea5c2-275f-11f0-86ff-569c3dd06744","fileId","f25260be-275f-11f0-86ff-569c3dd06744","parentId","branchId","branchVersion","latest",["D",1736392468981],2,"fileType","script","content","import type { MaybePromise } from \"https://esm.town/v/postpostscript/typeUtils\";\n\nexport function $chain(method: InterruptibleChainMethod): InterruptibleChain;\nexport function $chain(): InterruptibleChain;\nexport function $chain(\n method?: InterruptibleChainMethod,\n): InterruptibleChain | InterruptibleChain {\n if (!method) {\n const chain = $chain(() => {\n // never called\n return undefined;\n });\n chain.index = -1;\n return chain;\n }\n return new InterruptibleChain(method);\n}\n\nexport class InterruptibleChain {\n index = 0;\n parent: InterruptibleChain | undefined;\n method: InterruptibleChainMethod;\n\n constructor(method: InterruptibleChainMethod) {\n this.method = method;\n }\n\n then(method: InterruptibleChainMethod | InterruptibleChain): InterruptibleChain {\n let _method = typeof method === \"object\" ? subchainMethod(method) : method;\n const child = new InterruptibleChain(_method);\n if (this.index === -1) {\n return child;\n }\n child.index = this.index + 1;\n child.parent = this;\n return child;\n }\n\n init(state: InterruptibleChainState = {\n index: 0,\n value: undefined,\n }) {\n return new InterruptibleChainHandle(this, state);\n }\n}\n\nexport class InterruptibleChainHandle {\n state: InterruptibleChainState;\n chain: InterruptibleChain;\n interrupt: Interrupt | undefined = undefined;\n\n constructor(chain: InterruptibleChain, state: InterruptibleChainState = {\n index: 0,\n value: undefined,\n }) {\n this.chain = chain;\n this.state = state;\n }\n\n get done() {\n return this.state.index === this.chain.index + 1;\n }\n\n async advance(): Promise> {\n if (this.done) {\n throw new Error(\"chain is complete\");\n }\n this.interrupt = undefined;\n let chain: InterruptibleChain = this.chain;\n while (this.state.index < chain.index) {\n chain = chain.parent!;\n }\n let value: T | Interrupt;\n try {\n value = await chain.method(this.state.value, (reason, intermediateState) => {\n return new Interrupt(reason, chain, intermediateState);\n }, this.state.intermediateState);\n } catch (err) {\n if (err instanceof Interrupt) {\n value = err;\n } else {\n value = new Interrupt(err, chain);\n }\n }\n if (value instanceof Interrupt) {\n this.interrupt = value;\n if (value.intermediateState !== undefined) {\n this.state.intermediateState = value.intermediateState;\n } else if (\"intermediateState\" in this.state) {\n delete this.state.intermediateState;\n }\n return this;\n }\n this.state.value = value;\n if (\"intermediateState\" in this.state) {\n delete this.state.intermediateState;\n }\n this.state.index += 1;\n return this;\n }\n\n async untilDone(): Promise<\n {\n done: true;\n value: T;\n handle: InterruptibleChainHandle;\n } | {\n done: false;\n interrupt: Interrupt;\n handle: InterruptibleChainHandle;\n }\n > {\n this.interrupt = undefined;\n while (!(this.done || this.interrupt)) {\n await this.advance();\n }\n if (this.interrupt) {\n return {\n done: false,\n interrupt: this.interrupt,\n handle: this,\n };\n }\n return {\n done: true,\n value: this.state.value,\n handle: this,\n };\n }\n}\n\nexport class Interrupt {\n reason: T;\n chain: InterruptibleChain;\n intermediateState: IntermediateState | undefined;\n\n constructor(reason: T, chain: InterruptibleChain, intermediateState?: IntermediateState) {\n this.reason = reason;\n this.chain = chain;\n this.intermediateState = intermediateState;\n }\n}\n\nexport type IntermediateState = any;\n\nexport type InterruptibleChainMethod = (\n result: P,\n interrupt: (reason: R, intermediateState?: IntermediateState) => Interrupt,\n intermediateState?: IntermediateState,\n) => MaybePromise;\n\nexport type InterruptibleChainState = {\n index: number;\n value: any;\n intermediateState?: IntermediateState;\n};\n\ntype SubchainState = InterruptibleChainState | undefined;\n\nexport function subchainMethod(chain: InterruptibleChain): InterruptibleChainMethod {\n return async (previous, interrupt, intermediateState: SubchainState) => {\n const status = await chain.init(\n intermediateState || {\n index: 0,\n value: previous,\n },\n ).untilDone();\n\n if (status.done) {\n return status.value;\n } else {\n return interrupt(\n `subchain interrupted: ${status.interrupt.reason}`,\n status.handle.state,\n );\n }\n };\n}\n\nexport function join[]>(\n ...chains: Chains\n): InterruptibleChain> {\n let chain: InterruptibleChain = $chain((previous) => [[], previous]);\n\n for (const subchain of chains) {\n chain = chain.then(async ([result, previous], interrupt, intermediateState: SubchainState) => {\n const value = await subchainMethod(subchain)(undefined, interrupt, intermediateState);\n\n if (value instanceof Interrupt) {\n return value;\n }\n\n return [[\n ...result,\n value,\n ], undefined];\n });\n }\n\n chain = chain.then(([result, _]) => result);\n\n return chain as InterruptibleChain>;\n}\n\nexport type InterruptibleChainJoinResult[], Return extends any[] = []> =\n List extends [infer Chain extends InterruptibleChain, ...infer Rest extends InterruptibleChain[]]\n ? InterruptibleChainJoinResult<\n Rest,\n [...Return, (Chain extends InterruptibleChain ? Awaited : never)]\n >\n : Return;\n\nexport function append[]>(\n ...chains: Chains\n): InterruptibleChain> {\n let chain = chains[0];\n\n for (const next of chains) {\n chain = chain.then(next);\n }\n\n return chain;\n}\n\nexport type AppendResult[]> = List extends\n [infer Chain extends InterruptibleChain]\n ? (Chain extends InterruptibleChain ? Awaited : never)\n : (List extends [any, ...infer Rest extends InterruptibleChain[]] ? AppendResult<\n Rest\n >\n : never);","deleted","label",[98],"permalink","https://www.val.town/x/postpostscript/interruptibleChain/code/main.tsx","extension","actionData","errors"]