| | |
| | | import { Document } from "flexsearch" |
| | | import { ContentDetails } from "../../plugins/emitters/contentIndex" |
| | | import { registerEscapeHandler, relative, removeAllChildren } from "./util" |
| | | import { registerEscapeHandler, removeAllChildren } from "./util" |
| | | import { FullSlug, resolveRelative } from "../../util/path" |
| | | |
| | | interface Item { |
| | | slug: string, |
| | | title: string, |
| | | content: string, |
| | | id: number |
| | | slug: FullSlug |
| | | title: string |
| | | content: string |
| | | } |
| | | |
| | | let index: Document<Item> | undefined = undefined |
| | | |
| | | const contextWindowWords = 30 |
| | | const numSearchResults = 5 |
| | | function highlight(searchTerm: string, text: string, trim?: boolean) { |
| | | const tokenizedTerms = searchTerm.split(/\s+/).filter(t => t !== "") |
| | | let tokenizedText = text |
| | | // try to highlight longest tokens first |
| | | const tokenizedTerms = searchTerm |
| | | .split(/\s+/) |
| | | .filter(t => t !== "") |
| | | .filter((t) => t !== "") |
| | | .sort((a, b) => b.length - a.length) |
| | | let tokenizedText = text.split(/\s+/).filter((t) => t !== "") |
| | | |
| | | let startIndex = 0 |
| | | let endIndex = tokenizedText.length - 1 |
| | | if (trim) { |
| | | const includesCheck = (tok: string) => tokenizedTerms.some((term) => tok.toLowerCase().startsWith(term.toLowerCase())) |
| | | const includesCheck = (tok: string) => |
| | | tokenizedTerms.some((term) => tok.toLowerCase().startsWith(term.toLowerCase())) |
| | | const occurencesIndices = tokenizedText.map(includesCheck) |
| | | |
| | | let bestSum = 0 |
| | |
| | | tokenizedText = tokenizedText.slice(startIndex, endIndex) |
| | | } |
| | | |
| | | const slice = tokenizedText.map(tok => { |
| | | // see if this tok is prefixed by any search terms |
| | | for (const searchTok of tokenizedTerms) { |
| | | if (tok.toLowerCase().includes(searchTok.toLowerCase())) { |
| | | const regex = new RegExp(searchTok, "gi") |
| | | return tok.replace(regex, `<span class="highlight">$&</span>`) |
| | | const slice = tokenizedText |
| | | .map((tok) => { |
| | | // see if this tok is prefixed by any search terms |
| | | for (const searchTok of tokenizedTerms) { |
| | | if (tok.toLowerCase().includes(searchTok.toLowerCase())) { |
| | | const regex = new RegExp(searchTok.toLowerCase(), "gi") |
| | | return tok.replace(regex, `<span class="highlight">$&</span>`) |
| | | } |
| | | } |
| | | } |
| | | return tok |
| | | }) |
| | | return tok |
| | | }) |
| | | .join(" ") |
| | | |
| | | return `${startIndex === 0 ? "" : "..."}${slice}${endIndex === tokenizedText.length - 1 ? "" : "..."}` |
| | | return `${startIndex === 0 ? "" : "..."}${slice}${endIndex === tokenizedText.length - 1 ? "" : "..." |
| | | }` |
| | | } |
| | | |
| | | const encoder = (str: string) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])/) |
| | | let prevShortcutHandler: ((e: HTMLElementEventMap["keydown"]) => void) | undefined = undefined |
| | | document.addEventListener("nav", async (e: unknown) => { |
| | | const currentSlug = (e as CustomEventMap["nav"]).detail.url |
| | | |
| | | // setup index if it hasn't been already |
| | | const data = await fetchData |
| | | if (!index) { |
| | | index = new Document({ |
| | | cache: true, |
| | | charset: 'latin:extra', |
| | | optimize: true, |
| | | encode: encoder, |
| | | document: { |
| | | id: "slug", |
| | | index: [ |
| | | { |
| | | field: "title", |
| | | tokenize: "forward", |
| | | }, |
| | | { |
| | | field: "content", |
| | | tokenize: "reverse", |
| | | }, |
| | | ] |
| | | }, |
| | | }) |
| | | |
| | | for (const [slug, fileData] of Object.entries<ContentDetails>(data)) { |
| | | index.add({ |
| | | slug, |
| | | title: fileData.title, |
| | | content: fileData.content |
| | | }) |
| | | } |
| | | } |
| | | |
| | | const container = document.getElementById("search-container") |
| | | const sidebar = container?.closest(".sidebar") as HTMLElement |
| | | const searchIcon = document.getElementById("search-icon") |
| | | const searchBar = document.getElementById("search-bar") as HTMLInputElement | null |
| | | const results = document.getElementById("results-container") |
| | | const idDataMap = Object.keys(data) as FullSlug[] |
| | | |
| | | function hideSearch() { |
| | | container?.classList.remove("active") |
| | | if (searchBar) { |
| | | searchBar.value = "" // clear the input when we dismiss the search |
| | | } |
| | | if (sidebar) { |
| | | sidebar.style.zIndex = "unset" |
| | | } |
| | | if (results) { |
| | | removeAllChildren(results) |
| | | } |
| | | } |
| | | |
| | | function showSearch() { |
| | | if (sidebar) { |
| | | sidebar.style.zIndex = "1" |
| | | } |
| | | container?.classList.add("active") |
| | | searchBar?.focus() |
| | | } |
| | |
| | | } |
| | | } |
| | | |
| | | const formatForDisplay = (term: string, slug: string) => ({ |
| | | slug, |
| | | title: highlight(term, data[slug].title ?? ""), |
| | | content: highlight(term, data[slug].content ?? "", true), |
| | | }) |
| | | const formatForDisplay = (term: string, id: number) => { |
| | | const slug = idDataMap[id] |
| | | return { |
| | | id, |
| | | slug, |
| | | title: highlight(term, data[slug].title ?? ""), |
| | | content: highlight(term, data[slug].content ?? "", true), |
| | | } |
| | | } |
| | | |
| | | const resultToHTML = ({ slug, title, content }: Item) => { |
| | | const button = document.createElement("button") |
| | | button.classList.add("result-card") |
| | | button.id = slug |
| | | button.innerHTML = `<h3>${title}</h3><p>${content}</p>` |
| | | button.addEventListener('click', () => { |
| | | const targ = relative(currentSlug, slug) |
| | | window.spaNavigate(new URL(targ)) |
| | | button.addEventListener("click", () => { |
| | | const targ = resolveRelative(currentSlug, slug) |
| | | window.spaNavigate(new URL(targ, window.location.toString())) |
| | | }) |
| | | return button |
| | | } |
| | |
| | | } else { |
| | | results.append(...finalResults.map(resultToHTML)) |
| | | } |
| | | |
| | | } |
| | | |
| | | function onType(e: HTMLElementEventMap["input"]) { |
| | | async function onType(e: HTMLElementEventMap["input"]) { |
| | | const term = (e.target as HTMLInputElement).value |
| | | const searchResults = index?.search(term, 5) ?? [] |
| | | const getByField = (field: string): string[] => { |
| | | const searchResults = (await index?.searchAsync(term, numSearchResults)) ?? [] |
| | | const getByField = (field: string): number[] => { |
| | | const results = searchResults.filter((x) => x.field === field) |
| | | return results.length === 0 ? [] : [...results[0].result] as string[] |
| | | return results.length === 0 ? [] : ([...results[0].result] as number[]) |
| | | } |
| | | |
| | | // order titles ahead of content |
| | | const allIds: Set<string> = new Set([...getByField("title"), ...getByField("content")]) |
| | | const finalResults = [...allIds].map(id => formatForDisplay(term, id)) |
| | | const allIds: Set<number> = new Set([...getByField("title"), ...getByField("content")]) |
| | | const finalResults = [...allIds].map((id) => formatForDisplay(term, id)) |
| | | displayResults(finalResults) |
| | | } |
| | | |
| | | if (prevShortcutHandler) { |
| | | document.removeEventListener("keydown", prevShortcutHandler) |
| | | } |
| | | |
| | | document.removeEventListener("keydown", shortcutHandler) |
| | | document.addEventListener("keydown", shortcutHandler) |
| | | prevShortcutHandler = shortcutHandler |
| | | searchIcon?.removeEventListener("click", showSearch) |
| | | searchIcon?.addEventListener("click", showSearch) |
| | | searchBar?.removeEventListener("input", onType) |
| | | searchBar?.addEventListener("input", onType) |
| | | |
| | | // setup index if it hasn't been already |
| | | if (!index) { |
| | | index = new Document({ |
| | | cache: true, |
| | | charset: "latin:extra", |
| | | optimize: true, |
| | | encode: encoder, |
| | | document: { |
| | | id: "id", |
| | | index: [ |
| | | { |
| | | field: "title", |
| | | tokenize: "reverse", |
| | | }, |
| | | { |
| | | field: "content", |
| | | tokenize: "reverse", |
| | | }, |
| | | ], |
| | | }, |
| | | }) |
| | | |
| | | let id = 0 |
| | | for (const [slug, fileData] of Object.entries<ContentDetails>(data)) { |
| | | await index.addAsync(id, { |
| | | id, |
| | | slug: slug as FullSlug, |
| | | title: fileData.title, |
| | | content: fileData.content, |
| | | }) |
| | | id++ |
| | | } |
| | | } |
| | | |
| | | // register handlers |
| | | registerEscapeHandler(container, hideSearch) |
| | | }) |