forked from cadence/breezewiki
100 lines
3.1 KiB
JavaScript
100 lines
3.1 KiB
JavaScript
import {h, htm, render, signal, computed, effect} from "./preact.js"
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const html = htm.bind(h)
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const classNames = classArr => classArr.filter(el => el).join(" ")
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const eForm = document.getElementById("bw-pr-search-form")
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const eInput = document.getElementById("bw-pr-search-input")
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const eSuggestions = document.getElementById("bw-pr-search-suggestions")
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const hitsPromise = new Map()
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const hitsDone = new Set()
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const query = signal("")
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const focus = signal(false)
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const st = signal("ready")
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const suggestions = signal([])
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// processing functions
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function fetchSuggestions(query, setSuggestions) {
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if (query === "") query = "\0"
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if (hitsPromise.has(query)) return hitsPromise.get(query)
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const url = new URL(`https://${BWData.wikiname}.fandom.com/api.php`)
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url.searchParams.set("action", "opensearch")
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url.searchParams.set("format", "json")
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url.searchParams.set("namespace", "0") // wiki namespace, 0 is default
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url.searchParams.set("origin", "*") // mediawiki api cors
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url.searchParams.set("search", query)
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const sendUrl = BWData.strict_proxy
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? "/proxy?" + new URLSearchParams({dest: url})
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: url
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const promise = fetch(sendUrl).then(res => res.json()).then(root => {
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hitsDone.add(query)
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return Array(root[1].length).fill().map((_, i) => ({
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title: root[1][i],
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url: root[3][i]
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}))
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})
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hitsPromise.set(query, promise)
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return promise
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}
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function acceptSuggestion(hit) {
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st.value = "accepted"
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query.value = hit.title
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const dest = new URL(hit.url).pathname.match("/wiki/.*")
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location = `/${BWData.wikiname}${dest}`
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}
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// suggestion list view
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function Suggestion(hit) {
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return html`<li class="bw-ss__item"><button type="button" class="bw-ss__button" onClick=${() => acceptSuggestion(hit)}>${hit.title}</button></li>`
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}
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function SuggestionList() {
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return html`
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<ul class=${classNames(["bw-ss__list", focus.value && "bw-ss__list--focus", `bw-ss__list--${st.value}`])}>
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${suggestions.value.map(hit => html`<${Suggestion} ...${hit} />`)}
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</ul>`
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}
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render(html`<${SuggestionList} />`, eSuggestions)
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// input view
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effect(() => {
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query.value // dependency should always be tracked
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if (st.peek() === "accepted") return // lock results from changing during navigation
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st.value = "loading"
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fetchSuggestions(query.value).then(res => {
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suggestions.value = res
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if (hitsDone.size === hitsPromise.size) {
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st.value = "ready"
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}
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})
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})
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window.addEventListener("pageshow", () => {
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st.value = "ready" // unlock results from changing after returning to page
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})
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function SuggestionInput() {
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return html`
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<input type="text" name="q" id="bw-search-input" autocomplete="off" onInput=${e => query.value = e.target.value} value=${query.value} class=${classNames(["bw-ss__input", `bw-ss__input--${st.value}`])} />`
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}
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render(html`<${SuggestionInput} />`, eInput)
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// form focus
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eForm.addEventListener("focusin", () => focus.value = true)
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eForm.addEventListener("focusout", event => {
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if (eForm.contains(event.relatedTarget)) {
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// event fired when changing from one form element to the other
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focus.value = true
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} else {
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// event fired when moving out of the form element
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focus.value = false
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}
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})
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