Jon Staab
50 lines
1.1 KiB
TypeScript
50 lines
1.1 KiB
TypeScript
import {readable} from "svelte/store"
|
|
import {on, call} from "@welshman/lib"
|
|
import {deriveItems} from "@welshman/store"
|
|
import {getTopicTagValues} from "@welshman/util"
|
|
import {repository} from "./core.js"
|
|
|
|
export type Topic = {
|
|
name: string
|
|
count: number
|
|
}
|
|
|
|
export const topicsByName = call(() => {
|
|
const topicsByName = new Map<string, Topic>()
|
|
|
|
const addTopic = (name: string) => {
|
|
const topic = topicsByName.get(name)
|
|
|
|
if (topic) {
|
|
topic.count++
|
|
} else {
|
|
topicsByName.set(name, {name, count: 0})
|
|
}
|
|
}
|
|
|
|
for (const tagString of repository.eventsByTag.keys()) {
|
|
if (tagString.startsWith("t:")) {
|
|
addTopic(tagString.slice(2).toLowerCase())
|
|
}
|
|
}
|
|
|
|
return readable<Map<string, Topic>>(topicsByName, set => {
|
|
return on(repository, "update", ({added}) => {
|
|
let dirty = false
|
|
|
|
for (const event of added) {
|
|
for (const name of getTopicTagValues(event.tags)) {
|
|
addTopic(name)
|
|
dirty = true
|
|
}
|
|
}
|
|
|
|
if (dirty) {
|
|
set(topicsByName)
|
|
}
|
|
})
|
|
})
|
|
})
|
|
|
|
export const topics = deriveItems(topicsByName)
|