Jon Staab
79 lines
2.1 KiB
TypeScript
79 lines
2.1 KiB
TypeScript
import {fromPairs, parseJson, randomId} from "@welshman/lib"
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import {FEED, Address} from "@welshman/util"
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import type {TrustedEvent} from "@welshman/util"
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import {
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makeIntersectionFeed,
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hasSubFeeds,
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isTagFeed,
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isAuthorFeed,
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isScopeFeed,
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} from "@welshman/feeds"
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import type {Feed as IFeed} from "@welshman/feeds"
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export type Feed = {
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title: string
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identifier: string
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description: string
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definition: IFeed
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event?: TrustedEvent
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}
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export type PublishedFeed = Omit<Feed, "event"> & {
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event: TrustedEvent
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}
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export const normalizeFeedDefinition = (feed: IFeed) =>
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hasSubFeeds(feed) ? feed : makeIntersectionFeed(feed)
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export const makeFeed = (feed: Partial<Feed> = {}): Feed => ({
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title: "",
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description: "",
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identifier: randomId(),
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definition: makeIntersectionFeed(),
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...feed,
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})
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export const readFeed = (event: TrustedEvent) => {
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const {d: identifier, title = "", description = "", feed = ""} = fromPairs(event.tags)
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const definition = parseJson(feed) || makeIntersectionFeed()
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return {title, identifier, description, definition, event} as PublishedFeed
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}
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export const createFeed = ({identifier, definition, title, description}: Feed) => ({
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kind: FEED,
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content: "",
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tags: [
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["d", identifier],
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["alt", title],
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["title", title],
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["description", description],
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["feed", JSON.stringify(definition)],
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],
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})
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export const editFeed = (feed: PublishedFeed) => ({
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kind: FEED,
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content: feed.event.content,
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tags: Object.entries({
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...fromPairs(feed.event.tags),
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title: feed.title,
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alt: feed.title,
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description: feed.description,
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feed: JSON.stringify(feed.definition),
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}),
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})
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export const displayFeed = (feed?: Feed) => feed?.title || "[no name]"
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export const isTopicFeed = (f: IFeed) => isTagFeed(f) && f[1] === "#t"
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export const isMentionFeed = (f: IFeed) => isTagFeed(f) && f[1] === "#p"
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export const isAddressFeed = (f: IFeed) => isTagFeed(f) && f[1] === "#a"
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export const isContextFeed = (f: IFeed) =>
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isTagFeed(f) && f[1] === "#a" && f.slice(2).every(Address.isAddress)
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export const isPeopleFeed = (f: IFeed) => isAuthorFeed(f) || isScopeFeed(f)
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