[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12},"actionData","errors","root",{"_228":-5,"_231":232,"_233":234},"routes/shell",{"_40":41,"_227":-5,"_228":-5,"_229":230},"routes/repo",{"_33":-7,"_34":35,"_36":37,"_38":39,"_40":41,"_42":31,"_43":31,"_44":31,"_45":31,"_46":31,"_47":31,"_48":49,"_50":49,"_51":31,"_52":-7,"_53":-7,"_54":55,"_56":57,"_58":59,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68},"routes/repo.blob",{"_13":14,"_15":16,"_17":18,"_19":20,"_21":14,"_22":23,"_24":-5,"_25":26,"_27":28,"_28":29,"_30":31,"_32":14},"ref","a4ad84ef3a6b1b0ea1a1fe931096df9c9a1663d9","path","packages/question/src/react/questionnaire-controller.ts","oid","a7ac5fb1e98ef2492b973a256b435a6bccab48d6","size",18698,"commit","mounts",[],"source","plain",{"_13":14,"_15":16},"kind","text","import { derive } from \"../answer\";\nimport { crdt } from \"../draft\";\nimport { decision, identified } from \"../schema\";\nimport type { Definition, Drafts } from \"../index\";\nimport type { AddOptionResult, Collaborator } from \"./question-view\";\nimport type { Snapshot, Transport, Unsubscribe } from \"./questionnaire-types\";\n\ntype Model = crdt.Model>;\n\nconst EMPTY_DRAFTS: Drafts = Object.freeze({});\n\nfunction normalize(person: {\n\tclient: string;\n\thandle?: string;\n\tquestion?: string;\n}): Collaborator {\n\treturn {\n\t\tclient: person.client,\n\t\thandle: person.handle ?? \"unknown\",\n\t\t...(person.question ? { question: person.question } : {}),\n\t};\n}\n\n/**\n * Says which question this connection is working on, once per change.\n *\n * Focus moves between questions, not keystrokes, so deduping against what the\n * server last heard is all the throttling needed. The wanted question survives\n * a reconnect and is resent when the draft reopens.\n */\nexport class FocusReporter {\n\t#wanted: string | undefined;\n\t#sent: string | undefined;\n\t#online = false;\n\n\tconstructor(private readonly send: (question: string | undefined) => void) {}\n\n\tset(question: string | undefined): void {\n\t\tthis.#wanted = question;\n\t\tthis.#flush();\n\t}\n\n\t/** The draft is open (true) or gone (false); the server forgets us when it is gone. */\n\tonline(online: boolean): void {\n\t\tthis.#online = online;\n\t\tthis.#sent = undefined;\n\t\tthis.#flush();\n\t}\n\n\t#flush(): void {\n\t\tif (!this.#online || this.#wanted === this.#sent) return;\n\t\tthis.#sent = this.#wanted;\n\t\tthis.send(this.#wanted);\n\t}\n}\n\nexport class QuestionnaireController {\n\treadonly id: string;\n\treadonly bridge: Transport | undefined;\n\n\t#snapshot: Snapshot;\n\t#listeners = new Set<() => void>();\n\t#teardown: Unsubscribe[] = [];\n\t#model: Model | undefined;\n\t#definition: Definition | undefined;\n\t#revision = 0;\n\t#outbox: number[][] = [];\n\t#pending = Promise.resolve();\n\t#opening: Promise = Promise.resolve();\n\t#generationWaiters = new Set<() => void>();\n\t#generation = 0;\n\t#refs = 0;\n\t#connected: boolean;\n\t#active = false;\n\t#terminal = false;\n\t#focus = new FocusReporter(question => {\n\t\tthis.bridge?.send(\"question:presence\", { id: this.id, question });\n\t});\n\t#adding: { question: string; label: string; key: string } | undefined;\n\n\tconstructor(\n\t\tbridge: Transport | undefined,\n\t\tid: string,\n\t\tdefinition: Definition | undefined,\n\t\tconnected: boolean,\n\t) {\n\t\tthis.bridge = bridge;\n\t\tthis.id = id;\n\t\tthis.#connected = connected;\n\t\tthis.#snapshot = {\n\t\t\tdefinition,\n\t\t\tdrafts: EMPTY_DRAFTS,\n\t\t\tcollaborators: [],\n\t\t\tsyncing: !!bridge,\n\t\t\tsubmitting: false,\n\t\t\terror: undefined,\n\t\t\tfocus: undefined,\n\t\t\tclosed: false,\n\t\t};\n\t}\n\n\tgetSnapshot = (): Snapshot => this.#snapshot;\n\n\tsubscribe = (listener: () => void): Unsubscribe => {\n\t\tthis.#listeners.add(listener);\n\t\tthis.#refs++;\n\t\tif (this.#refs === 1) this.#start();\n\n\t\treturn () => {\n\t\t\tthis.#listeners.delete(listener);\n\t\t\tthis.#refs--;\n\t\t\t// React Strict Mode subscribes, cleans up, then subscribes again. A\n\t\t\t// microtask grace period turns that into one transport lifecycle rather\n\t\t\t// than two opens with a spurious presence clear between them.\n\t\t\tif (this.#refs === 0) {\n\t\t\t\tqueueMicrotask(() => this.#stopIfUnobserved());\n\t\t\t}\n\t\t};\n\t};\n\n\tconfigure(definition: Definition | undefined, connected: boolean): void {\n\t\tif (definition && !this.#snapshot.definition) this.#set({ definition });\n\t\tif (connected === this.#connected) return;\n\t\tthis.#connected = connected;\n\t\tif (!connected) {\n\t\t\tthis.#stop(false);\n\t\t\tthis.#set({ syncing: !!this.bridge, collaborators: [] });\n\t\t} else if (this.#refs > 0) {\n\t\t\tthis.#start();\n\t\t}\n\t}\n\n\tchange = (question: string, patch: Record): void => {\n\t\tlet doc = this.#model;\n\t\tif (!doc || this.#snapshot.closed || this.#terminal || this.#snapshot.submitting) return;\n\t\tthis.#set({ error: undefined, focus: undefined });\n\n\t\tdoc.api.transaction(() => {\n\t\t\tif (patch.mode !== undefined) doc.api.val([question, \"mode\"]).set(patch.mode);\n\t\t\tif (patch.choice !== undefined) {\n\t\t\t\tdoc.api.val([question, \"mode\"]).set(\"choices\");\n\t\t\t\tdoc.api.val([question, \"choice\"]).set(patch.choice);\n\t\t\t}\n\t\t\tif (patch.options !== undefined) {\n\t\t\t\tdoc.api.val([question, \"mode\"]).set(\"choices\");\n\t\t\t\tlet held = (doc.view() as Drafts)[question]?.options ?? {};\n\t\t\t\tfor (let [option, value] of Object.entries(patch.options as Record)) {\n\t\t\t\t\t// An option appended after this draft began has no register yet.\n\t\t\t\t\tif (Object.hasOwn(held, option)) doc.api.val([question, \"options\", option]).set(value);\n\t\t\t\t\telse {\n\t\t\t\t\t\tdoc.api.obj([question, \"options\"]).set({\n\t\t\t\t\t\t\t[option]: crdt.schema.val(crdt.schema.con(value)),\n\t\t\t\t\t\t});\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (patch.custom !== undefined) {\n\t\t\t\tlet value = doc.api.str([question, \"custom\"]);\n\t\t\t\tvalue.del(0, value.length());\n\t\t\t\tvalue.ins(0, patch.custom as string);\n\t\t\t}\n\t\t});\n\t};\n\n\t/** Report the question this person is working on; undefined when they leave it. */\n\tfocusQuestion = (question: string | undefined): void => {\n\t\tthis.#focus.set(this.#terminal ? undefined : question);\n\t};\n\n\tsubmit = (visibleSuggestion?: { optionId: string; revision: number }): void => {\n\t\tlet definition = this.#definition;\n\t\tlet doc = this.#model;\n\t\tif (\n\t\t\t!this.bridge || !definition || !doc || this.#snapshot.closed || this.#terminal\n\t\t\t|| this.#snapshot.submitting\n\t\t) return;\n\n\t\tlet drafts = doc.view() as Drafts;\n\t\tlet outcome = derive(definition, drafts);\n\t\tlet suggestion: { optionId: string; revision: number } | undefined;\n\t\tif (!outcome.ok && visibleSuggestion) {\n\t\t\tlet question = definition.questions[0];\n\t\t\tlet draft = question && drafts[question.id];\n\t\t\tif (\n\t\t\t\tdefinition.questions.length === 1 && question && !question.multiple && draft\n\t\t\t\t&& draft.mode === \"choices\" && draft.choice === null && draft.custom.length === 0\n\t\t\t\t&& !Object.values(draft.options).some(Boolean)\n\t\t\t\t&& question.options.some(option => option.id === visibleSuggestion.optionId)\n\t\t\t\t&& Number.isSafeInteger(visibleSuggestion.revision)\n\t\t\t) {\n\t\t\t\tsuggestion = {\n\t\t\t\t\toptionId: visibleSuggestion.optionId,\n\t\t\t\t\trevision: visibleSuggestion.revision,\n\t\t\t\t};\n\t\t\t\toutcome = derive(definition, {\n\t\t\t\t\t...drafts,\n\t\t\t\t\t[question.id]: { ...draft, choice: suggestion.optionId },\n\t\t\t\t});\n\t\t\t}\n\t\t}\n\t\tif (!outcome.ok) {\n\t\t\tthis.#set({\n\t\t\t\tfocus: outcome.question,\n\t\t\t\terror: outcome.message,\n\t\t\t});\n\t\t\treturn;\n\t\t}\n\n\t\tthis.#terminal = true;\n\t\tthis.#focus.set(undefined);\n\t\tthis.#set({ submitting: true, error: undefined });\n\t\tlet submit = async () => {\n\t\t\t// The CRDT batches its change callback into a microtask. Let the final\n\t\t\t// input event enter the outbox before choosing the revision to submit.\n\t\t\tawait Promise.resolve();\n\t\t\twhile (true) {\n\t\t\t\tif (this.#snapshot.closed) return;\n\t\t\t\tif (!this.#active || !this.#connected) {\n\t\t\t\t\tthrow new Error(\"questionnaire is disconnected\");\n\t\t\t\t}\n\t\t\t\tlet generation = this.#generation;\n\t\t\t\tlet wake!: () => void;\n\t\t\t\tlet changed = new Promise(resolve => wake = resolve);\n\t\t\t\tthis.#generationWaiters.add(wake);\n\t\t\t\ttry {\n\t\t\t\t\t// A definition refresh abandons the old edit queue. Wait for the\n\t\t\t\t\t// new open and its replay instead of waiting for an obsolete ack.\n\t\t\t\t\tawait Promise.race([this.#opening, changed]);\n\t\t\t\t\tif (generation !== this.#generation) continue;\n\t\t\t\t\tif (this.#snapshot.closed) return;\n\t\t\t\t\tif (!this.#model) throw new Error(\"questionnaire is not synchronized\");\n\t\t\t\t\tlet pending = this.#pending;\n\t\t\t\t\tawait Promise.race([pending, changed]);\n\t\t\t\t\tif (generation !== this.#generation || pending !== this.#pending) continue;\n\t\t\t\t\tif (this.#outbox.length > 0) {\n\t\t\t\t\t\tthrow new Error(\"questionnaire edits are not synchronized\");\n\t\t\t\t\t}\n\t\t\t\t\treturn this.bridge!.ask(\"question:submit\", {\n\t\t\t\t\t\tid: this.id,\n\t\t\t\t\t\trevision: suggestion?.revision ?? this.#revision,\n\t\t\t\t\t\t...(suggestion ? { suggestedOptionId: suggestion.optionId } : {}),\n\t\t\t\t\t});\n\t\t\t\t} finally {\n\t\t\t\t\tthis.#generationWaiters.delete(wake);\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t\tvoid submit()\n\t\t\t.then((raw: unknown) => {\n\t\t\t\tif (this.#snapshot.closed) return;\n\t\t\t\tlet reply = raw as unknown as { ok?: boolean; reason?: string; message?: string };\n\t\t\t\tif (reply.ok) return;\n\t\t\t\tif (reply.reason === \"stale\") {\n\t\t\t\t\tthis.#terminal = false;\n\t\t\t\t\tthis.#set({ error: \"Answers changed while submitting. Review and try again.\" });\n\t\t\t\t\tthis.#restart();\n\t\t\t\t} else if (reply.reason === \"resolved\") {\n\t\t\t\t\tthis.#close();\n\t\t\t\t} else {\n\t\t\t\t\tthis.#terminal = false;\n\t\t\t\t\tthis.#set({ error: reply.message ?? \"Could not submit these answers.\" });\n\t\t\t\t}\n\t\t\t})\n\t\t\t.catch(() => {\n\t\t\t\tif (this.#snapshot.closed) return;\n\t\t\t\tthis.#terminal = false;\n\t\t\t\tthis.#set({ error: \"Could not submit these answers.\" });\n\t\t\t})\n\t\t\t.finally(() => {\n\t\t\t\tif (!this.#terminal) this.#set({ submitting: false });\n\t\t\t\tthis.#stopIfUnobserved();\n\t\t\t});\n\t};\n\n\tdiscard = (): void => {\n\t\tif (!this.bridge || this.#snapshot.closed || this.#terminal || this.#snapshot.submitting) {\n\t\t\treturn;\n\t\t}\n\t\tthis.#terminal = true;\n\t\tthis.#focus.set(undefined);\n\t\tthis.#set({ submitting: true, error: undefined });\n\n\t\tvoid this.bridge.ask(\"question:discard\", { id: this.id })\n\t\t\t.then((raw: never) => {\n\t\t\t\tlet reply = raw as unknown as { ok?: boolean; reason?: string };\n\t\t\t\tif (reply.ok || reply.reason === \"resolved\") this.#close();\n\t\t\t\telse {\n\t\t\t\t\tthis.#terminal = false;\n\t\t\t\t\tthis.#set({ error: \"Could not discard this decision.\" });\n\t\t\t\t}\n\t\t\t})\n\t\t\t.catch(() => {\n\t\t\t\tthis.#terminal = false;\n\t\t\t\tthis.#set({ error: \"Could not discard this decision.\" });\n\t\t\t})\n\t\t\t.finally(() => {\n\t\t\t\tif (!this.#terminal) this.#set({ submitting: false });\n\t\t\t\tthis.#stopIfUnobserved();\n\t\t\t});\n\t};\n\n\tcancel = (): void => {\n\t\tif (!this.bridge || this.#snapshot.closed || this.#terminal || this.#snapshot.submitting) {\n\t\t\treturn;\n\t\t}\n\t\tthis.#terminal = true;\n\t\tthis.#focus.set(undefined);\n\t\tthis.#set({ submitting: true, error: undefined });\n\n\t\tvoid this.bridge.ask(\"question:cancel\", { id: this.id })\n\t\t\t.then((raw: never) => {\n\t\t\t\tlet reply = raw as unknown as { ok?: boolean; reason?: string };\n\t\t\t\tif (reply.ok || reply.reason === \"resolved\") this.#close();\n\t\t\t\telse {\n\t\t\t\t\tthis.#terminal = false;\n\t\t\t\t\tthis.#set({ error: \"Could not cancel this question.\" });\n\t\t\t\t}\n\t\t\t})\n\t\t\t.catch(() => {\n\t\t\t\tthis.#terminal = false;\n\t\t\t\tthis.#set({ error: \"Could not cancel this question.\" });\n\t\t\t})\n\t\t\t.finally(() => {\n\t\t\t\tif (!this.#terminal) this.#set({ submitting: false });\n\t\t\t\tthis.#stopIfUnobserved();\n\t\t\t});\n\t};\n\n\treopen = async (): Promise<{ ok: true } | { ok: false; message: string }> => {\n\t\tif (!this.bridge || !this.#connected) return { ok: false, message: \"Not connected.\" };\n\t\ttry {\n\t\t\tlet reply = await this.bridge.ask(\"question:reopen\", { id: this.id }) as unknown as {\n\t\t\t\tok: boolean;\n\t\t\t\treason?: string;\n\t\t\t};\n\t\t\tif (reply.ok) return { ok: true };\n\t\t\treturn {\n\t\t\t\tok: false,\n\t\t\t\tmessage: reply.reason === \"not-decided\"\n\t\t\t\t\t? \"Only a decided card can be reopened.\"\n\t\t\t\t\t: \"Could not reopen it. Try again.\",\n\t\t\t};\n\t\t} catch {\n\t\t\treturn { ok: false, message: \"Could not reopen it. Try again.\" };\n\t\t}\n\t};\n\n\taddOption = async (question: string, label: string): Promise => {\n\t\tif (!this.bridge || this.#snapshot.closed || this.#terminal) {\n\t\t\treturn { ok: false, message: \"This question is no longer open.\" };\n\t\t}\n\t\tif (!this.#connected) return { ok: false, message: \"Reconnect to add an option.\" };\n\t\t// A retry of the same text after a lost reply must not add a second option.\n\t\tlet last = this.#adding;\n\t\tlet key = last && last.question === question && last.label === label\n\t\t\t? last.key\n\t\t\t: crypto.randomUUID();\n\t\tthis.#adding = { question, label, key };\n\n\t\tlet reply: {\n\t\t\tok?: boolean;\n\t\t\tmessage?: string;\n\t\t\tdefinition?: Definition;\n\t\t};\n\t\ttry {\n\t\t\treply = await this.bridge.ask(\"question:option\", {\n\t\t\t\tid: this.id,\n\t\t\t\tquestion,\n\t\t\t\tkey,\n\t\t\t\tlabel,\n\t\t\t}) as never;\n\t\t} catch {\n\t\t\treturn { ok: false, message: \"Could not add this option. Try again.\" };\n\t\t}\n\t\tif (!reply.ok) return { ok: false, message: reply.message ?? \"Could not add this option.\" };\n\t\tthis.#adding = undefined;\n\t\tif (reply.definition) this.#redefine(reply.definition);\n\t\treturn { ok: true };\n\t};\n\n\t/** Take the server's definition when it has gained options. */\n\t#redefine(next: Definition): void {\n\t\tlet current = this.#definition ?? this.#snapshot.definition;\n\t\tlet added = next.questions[0]?.options.length ?? 0;\n\t\tlet held = current?.questions[0]?.options.length ?? 0;\n\t\t// Only ever forward: a late duplicate must not erase a newer option.\n\t\tif (added <= held) return;\n\t\ttry {\n\t\t\tlet definition = decision(identified(next));\n\t\t\tif (this.#definition) this.#definition = definition;\n\t\t\tthis.#set({ definition });\n\t\t} catch {\n\t\t\t// A definition the domain rejects is ignored; the next open resyncs.\n\t\t}\n\t}\n\n\tforget(): void {\n\t\tthis.#close();\n\t}\n\n\t#set(patch: Partial): void {\n\t\tthis.#snapshot = { ...this.#snapshot, ...patch };\n\t\tfor (let listener of this.#listeners) listener();\n\t}\n\n\t#start(): void {\n\t\tif (this.#active || !this.bridge || !this.#connected || this.#snapshot.closed) return;\n\t\tthis.#active = true;\n\t\tthis.#opening = this.#init(++this.#generation);\n\t}\n\n\t#restart(): void {\n\t\tthis.#stop(false);\n\t\tif (this.#refs > 0 || this.#snapshot.submitting) this.#start();\n\t}\n\n\t#stopIfUnobserved(): void {\n\t\tif (this.#refs === 0 && !this.#snapshot.submitting) this.#stop(true);\n\t}\n\n\t#stop(presence: boolean): void {\n\t\tif (!this.#active) return;\n\t\tthis.#active = false;\n\t\tthis.#generation++;\n\t\tfor (let wake of this.#generationWaiters) wake();\n\t\tthis.#generationWaiters.clear();\n\t\tfor (let off of this.#teardown.splice(0)) off();\n\t\tthis.#model = undefined;\n\t\tthis.#definition = undefined;\n\t\tthis.#focus.online(false);\n\t\tif (presence) this.#focus.set(undefined);\n\t\t// A previous generation's edit may never answer. New opens replay every\n\t\t// unacknowledged patch through their own queue.\n\t\tthis.#pending = Promise.resolve();\n\t\tif (presence && this.bridge && this.#connected) {\n\t\t\tthis.bridge.send(\"question:presence\", { id: this.id });\n\t\t}\n\t}\n\n\t#close(): void {\n\t\tthis.#terminal = true;\n\t\tthis.#focus.set(undefined);\n\t\tthis.#outbox = [];\n\t\tthis.#set({ closed: true, syncing: false, submitting: false, collaborators: [] });\n\t\tthis.#stop(false);\n\t}\n\n\tasync #init(generation: number): Promise {\n\t\tlet channel = this.bridge!;\n\t\tthis.#set({ syncing: true, error: undefined });\n\n\t\tlet buffered: number[][] = [];\n\t\tlet apply: ((patch: number[]) => void) | undefined;\n\n\t\tthis.#teardown.push(\n\t\t\tchannel.on(\"question:changed\", (raw: never) => {\n\t\t\t\tlet event = raw as unknown as { id: string; definition: Definition };\n\t\t\t\tif (event.id !== this.id) return;\n\t\t\t\tthis.#set({ definition: event.definition });\n\t\t\t\tqueueMicrotask(() => {\n\t\t\t\t\tif (this.#valid(generation)) this.#restart();\n\t\t\t\t});\n\t\t\t}),\n\t\t\tchannel.on(\"question:edit\", (raw: never) => {\n\t\t\t\tlet event = raw as unknown as {\n\t\t\t\t\tid: string;\n\t\t\t\t\topen?: boolean;\n\t\t\t\t\taccepted?: boolean;\n\t\t\t\t\tapplied?: boolean;\n\t\t\t\t\trevision: number;\n\t\t\t\t\tpatch: number[];\n\t\t\t\t};\n\t\t\t\tif (event.id !== this.id || !event.open || !event.accepted) return;\n\t\t\t\tthis.#revision = Math.max(this.#revision, event.revision);\n\t\t\t\tif (!event.applied) return;\n\t\t\t\tif (apply) apply(event.patch);\n\t\t\t\telse buffered.push(event.patch);\n\t\t\t}),\n\t\t\tchannel.on(\"question:presence\", (raw: never) => {\n\t\t\t\tlet event = raw as unknown as {\n\t\t\t\t\tid: string;\n\t\t\t\t\tclient: string;\n\t\t\t\t\thandle?: string;\n\t\t\t\t\tquestion?: string;\n\t\t\t\t};\n\t\t\t\tif (event.id !== this.id) return;\n\t\t\t\tlet person = normalize(event);\n\t\t\t\tlet next = this.#snapshot.collaborators.filter(item => item.client !== person.client);\n\t\t\t\tthis.#set({ collaborators: event.question ? 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Syncing latest answers.`,\n\t\t\t\t\t\t\t});\n\t\t\t\t\t\t\tthis.#restart();\n\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tthis.#revision = Math.max(this.#revision, ack.revision ?? 0);\n\t\t\t\t\t})\n\t\t\t\t\t.catch(() => {\n\t\t\t\t\t\t// Left in the outbox for the next successful open.\n\t\t\t\t\t});\n\t\t\t});\n\t\t};\n\n\t\tlet offChanges = doc.api.onChanges.listen(() => {\n\t\t\tthis.#set({ drafts: doc.view() as Drafts });\n\t\t\tlet patch = doc.api.flush();\n\t\t\tif (patch.ops.length === 0) return;\n\t\t\tlet binary = Array.from(patch.toBinary() as Uint8Array);\n\t\t\tthis.#outbox.push(binary);\n\t\t\tsend(binary);\n\t\t});\n\n\t\tthis.#teardown.push(offChanges);\n\t\tthis.#model = doc;\n\t\tthis.#definition = definition;\n\t\tfor (let patch of this.#outbox) send(patch);\n\n\t\tthis.#focus.online(true);\n\t\tthis.#set({\n\t\t\tdefinition,\n\t\t\tdrafts: doc.view() as Drafts,\n\t\t\tcollaborators: (reply.presence ?? 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