75 lines
2.2 KiB
TypeScript
75 lines
2.2 KiB
TypeScript
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import {max, partition, pushToMapKey, sortBy, spec} from "@welshman/lib"
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import type {TrustedEvent} from "@welshman/util"
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import {CLASSIFIED, tagSpec, tagValue} from "@welshman/util"
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import {Classified} from "@welshman/domain"
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import {normalizeTopic} from "@lib/util"
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import {reader} from "@app/core"
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export const CLASSIFIED_STATUS_TABS = [
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{value: "all", label: "All"},
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{value: "active", label: "Active"},
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{value: "sold", label: "Sold"},
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]
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export const SUGGESTED_TOPICS = ["for sale", "wanted", "job", "service", "free"]
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// Splits a feed into listings and their comments, scoring each listing by last activity.
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export const partitionListings = (events: TrustedEvent[]) => {
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const scores = new Map<string, number[]>()
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const [listings, comments] = partition(spec({kind: CLASSIFIED}), events)
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for (const comment of comments) {
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const id = tagValue(tagSpec("E"), comment.tags)
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if (id) {
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pushToMapKey(scores, id, comment.created_at)
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}
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}
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const activeAt = new Map<string, number>()
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for (const listing of listings) {
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activeAt.set(listing.id, max([...(scores.get(listing.id) || []), listing.created_at]))
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}
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return {listings, activeAt}
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}
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export const deriveTopicCounts = (events: TrustedEvent[]) => {
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const counts = new Map<string, number>()
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for (const event of events) {
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for (const topic of reader(Classified)(event).topics() ?? []) {
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const normalized = normalizeTopic(topic)
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counts.set(normalized, (counts.get(normalized) || 0) + 1)
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}
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}
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return sortBy(([, count]) => -count, Array.from(counts.entries()))
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}
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export const getStatus = (event: TrustedEvent) => reader(Classified)(event).status() ?? "active"
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export const matchesTopic = (event: TrustedEvent, topic: string) =>
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!topic ||
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Boolean(
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reader(Classified)(event)
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.topics()
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?.some(t => normalizeTopic(t) === topic),
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)
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export const matchesQuery = (event: TrustedEvent, query: string) => {
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const q = query.trim().toLowerCase()
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if (!q) return true
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const classified = reader(Classified)(event)
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const haystack = [classified.title(), classified.summary(), event.content]
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.filter(Boolean)
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.join(" ")
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.toLowerCase()
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return haystack.includes(q)
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}
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