Jon Staab
63 lines
1.7 KiB
TypeScript
63 lines
1.7 KiB
TypeScript
import {uniq, first} from "@welshman/lib"
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import {POLL_RESPONSE, getTagValue, getTagValues} from "@welshman/util"
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import {EventReader} from "../EventReader.js"
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import {EventBuilder} from "../EventBuilder.js"
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// NIP-88 kind-1018 poll vote. Empty content; the target poll is referenced via
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// an "e" tag and each chosen option id lives in its own "response" tag. Tags-only
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// content, so it extends EventReader/EventBuilder directly.
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export class PollResponse extends EventReader {
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readonly kind = POLL_RESPONSE
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pollId() {
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return getTagValue("e", this.event.tags) || ""
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}
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selections() {
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return uniq(getTagValues("response", this.event.tags))
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}
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builder() {
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return new PollResponseBuilder(this)
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}
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}
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export class PollResponseBuilder extends EventBuilder<PollResponse> {
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readonly kind = POLL_RESPONSE
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pollId = ""
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selections: string[] = []
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constructor(readonly reader?: PollResponse) {
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super(reader)
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// Consume the represented tags out of the carried-over extraTags so they
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// round-trip through the structured fields below rather than being emitted
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// twice (once from buildTags, once from the base's extraTags pass-through).
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this.pollId = first(this.consumeTags("e"))?.[1] ?? ""
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this.selections = uniq(this.consumeTags("response").map(t => t[1]))
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}
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setPollId(pollId: string) {
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this.pollId = pollId
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return this
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}
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addSelection(id: string) {
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this.selections = uniq([...this.selections, id])
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return this
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}
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protected validate() {
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if (!this.pollId) {
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throw new Error("PollResponse requires a pollId")
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}
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}
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protected buildTags() {
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return [["e", this.pollId], ...this.selections.map(id => ["response", id])]
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}
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}
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