| | |
| | | import { Document } from "flexsearch" |
| | | import FlexSearch 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 |
| | | tags: string[] |
| | | } |
| | | let index: Document<Item> | undefined = undefined |
| | | |
| | | let index: FlexSearch.Document<Item> | undefined = undefined |
| | | |
| | | // Can be expanded with things like "term" in the future |
| | | type SearchType = "basic" | "tags" |
| | | |
| | | // Current searchType |
| | | let searchType: SearchType = "basic" |
| | | |
| | | const contextWindowWords = 30 |
| | | const numSearchResults = 5 |
| | | const numTagResults = 3 |
| | | function highlight(searchTerm: string, text: string, trim?: boolean) { |
| | | // try to highlight longest tokens first |
| | | const tokenizedTerms = searchTerm.split(/\s+/).filter(t => t !== "").sort((a, b) => b.length - a.length) |
| | | let tokenizedText = text |
| | | 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 occurencesIndices = tokenizedText.map(includesCheck) |
| | | const includesCheck = (tok: string) => |
| | | tokenizedTerms.some((term) => tok.toLowerCase().startsWith(term.toLowerCase())) |
| | | const occurrencesIndices = tokenizedText.map(includesCheck) |
| | | |
| | | let bestSum = 0 |
| | | let bestIndex = 0 |
| | | for (let i = 0; i < Math.max(tokenizedText.length - contextWindowWords, 0); i++) { |
| | | const window = occurencesIndices.slice(i, i + contextWindowWords) |
| | | const window = occurrencesIndices.slice(i, i + contextWindowWords) |
| | | const windowSum = window.reduce((total, cur) => total + (cur ? 1 : 0), 0) |
| | | if (windowSum >= bestSum) { |
| | | bestSum = windowSum |
| | |
| | | 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.toLowerCase(), "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)) { |
| | | await index.addAsync(slug, { |
| | | 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 resultCards = document.getElementsByClassName("result-card") |
| | | 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) |
| | | } |
| | | |
| | | searchType = "basic" // reset search type after closing |
| | | } |
| | | |
| | | function showSearch() { |
| | | function showSearch(searchTypeNew: SearchType) { |
| | | searchType = searchTypeNew |
| | | if (sidebar) { |
| | | sidebar.style.zIndex = "1" |
| | | } |
| | | container?.classList.add("active") |
| | | searchBar?.focus() |
| | | } |
| | | |
| | | function shortcutHandler(e: HTMLElementEventMap["keydown"]) { |
| | | if (e.key === "k" && (e.ctrlKey || e.metaKey)) { |
| | | if (e.key === "k" && (e.ctrlKey || e.metaKey) && !e.shiftKey) { |
| | | e.preventDefault() |
| | | const searchBarOpen = container?.classList.contains("active") |
| | | searchBarOpen ? hideSearch() : showSearch() |
| | | } else if (e.key === "Enter") { |
| | | const anchor = document.getElementsByClassName("result-card")[0] as HTMLInputElement | null |
| | | if (anchor) { |
| | | anchor.click() |
| | | searchBarOpen ? hideSearch() : showSearch("basic") |
| | | } else if (e.shiftKey && (e.ctrlKey || e.metaKey) && e.key.toLowerCase() === "k") { |
| | | // Hotkey to open tag search |
| | | e.preventDefault() |
| | | const searchBarOpen = container?.classList.contains("active") |
| | | searchBarOpen ? hideSearch() : showSearch("tags") |
| | | |
| | | // add "#" prefix for tag search |
| | | if (searchBar) searchBar.value = "#" |
| | | } |
| | | |
| | | if (!container?.classList.contains("active")) return |
| | | else if (e.key === "Enter") { |
| | | // If result has focus, navigate to that one, otherwise pick first result |
| | | if (results?.contains(document.activeElement)) { |
| | | const active = document.activeElement as HTMLInputElement |
| | | active.click() |
| | | } else { |
| | | const anchor = document.getElementsByClassName("result-card")[0] as HTMLInputElement | null |
| | | anchor?.click() |
| | | } |
| | | } else if (e.key === "ArrowUp" || (e.shiftKey && e.key === "Tab")) { |
| | | e.preventDefault() |
| | | if (results?.contains(document.activeElement)) { |
| | | // If an element in results-container already has focus, focus previous one |
| | | const prevResult = document.activeElement?.previousElementSibling as HTMLInputElement | null |
| | | prevResult?.focus() |
| | | } |
| | | } else if (e.key === "ArrowDown" || e.key === "Tab") { |
| | | e.preventDefault() |
| | | // When first pressing ArrowDown, results wont contain the active element, so focus first element |
| | | if (!results?.contains(document.activeElement)) { |
| | | const firstResult = resultCards[0] as HTMLInputElement | null |
| | | firstResult?.focus() |
| | | } else { |
| | | // If an element in results-container already has focus, focus next one |
| | | const nextResult = document.activeElement?.nextElementSibling as HTMLInputElement | null |
| | | nextResult?.focus() |
| | | } |
| | | } |
| | | } |
| | | |
| | | const formatForDisplay = (term: string, slug: string) => ({ |
| | | slug, |
| | | title: highlight(term, data[slug].title ?? ""), |
| | | content: highlight(term, data[slug].content ?? "", true), |
| | | }) |
| | | function trimContent(content: string) { |
| | | // works without escaping html like in `description.ts` |
| | | const sentences = content.replace(/\s+/g, " ").split(".") |
| | | let finalDesc = "" |
| | | let sentenceIdx = 0 |
| | | |
| | | 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)) |
| | | // Roughly estimate characters by (words * 5). Matches description length in `description.ts`. |
| | | const len = contextWindowWords * 5 |
| | | while (finalDesc.length < len) { |
| | | const sentence = sentences[sentenceIdx] |
| | | if (!sentence) break |
| | | finalDesc += sentence + "." |
| | | sentenceIdx++ |
| | | } |
| | | |
| | | // If more content would be available, indicate it by finishing with "..." |
| | | if (finalDesc.length < content.length) { |
| | | finalDesc += ".." |
| | | } |
| | | |
| | | return finalDesc |
| | | } |
| | | |
| | | const formatForDisplay = (term: string, id: number) => { |
| | | const slug = idDataMap[id] |
| | | return { |
| | | id, |
| | | slug, |
| | | title: searchType === "tags" ? data[slug].title : highlight(term, data[slug].title ?? ""), |
| | | // if searchType is tag, display context from start of file and trim, otherwise use regular highlight |
| | | content: |
| | | searchType === "tags" |
| | | ? trimContent(data[slug].content) |
| | | : highlight(term, data[slug].content ?? "", true), |
| | | tags: highlightTags(term, data[slug].tags), |
| | | } |
| | | } |
| | | |
| | | function highlightTags(term: string, tags: string[]) { |
| | | if (tags && searchType === "tags") { |
| | | // Find matching tags |
| | | const termLower = term.toLowerCase() |
| | | let matching = tags.filter((str) => str.includes(termLower)) |
| | | |
| | | // Subtract matching from original tags, then push difference |
| | | if (matching.length > 0) { |
| | | let difference = tags.filter((x) => !matching.includes(x)) |
| | | |
| | | // Convert to html (cant be done later as matches/term dont get passed to `resultToHTML`) |
| | | matching = matching.map((tag) => `<li><p class="match-tag">#${tag}</p></li>`) |
| | | difference = difference.map((tag) => `<li><p>#${tag}</p></li>`) |
| | | matching.push(...difference) |
| | | } |
| | | |
| | | // Only allow max of `numTagResults` in preview |
| | | if (tags.length > numTagResults) { |
| | | matching.splice(numTagResults) |
| | | } |
| | | |
| | | return matching |
| | | } else { |
| | | return [] |
| | | } |
| | | } |
| | | |
| | | const resultToHTML = ({ slug, title, content, tags }: Item) => { |
| | | const htmlTags = tags.length > 0 ? `<ul>${tags.join("")}</ul>` : `` |
| | | const itemTile = document.createElement("a") |
| | | itemTile.classList.add("result-card") |
| | | itemTile.id = slug |
| | | itemTile.href = new URL(resolveRelative(currentSlug, slug), location.toString()).toString() |
| | | itemTile.innerHTML = `<h3>${title}</h3>${htmlTags}<p>${content}</p>` |
| | | itemTile.addEventListener("click", (event) => { |
| | | if (event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) return |
| | | hideSearch() |
| | | }) |
| | | return button |
| | | return itemTile |
| | | } |
| | | |
| | | function displayResults(finalResults: Item[]) { |
| | |
| | | |
| | | removeAllChildren(results) |
| | | if (finalResults.length === 0) { |
| | | results.innerHTML = `<button class="result-card"> |
| | | results.innerHTML = `<a class="result-card"> |
| | | <h3>No results.</h3> |
| | | <p>Try another search term?</p> |
| | | </button>` |
| | | </a>` |
| | | } else { |
| | | results.append(...finalResults.map(resultToHTML)) |
| | | } |
| | | |
| | | } |
| | | |
| | | function onType(e: HTMLElementEventMap["input"]) { |
| | | const term = (e.target as HTMLInputElement).value |
| | | const searchResults = index?.search(term, 5) ?? [] |
| | | const getByField = (field: string): string[] => { |
| | | async function onType(e: HTMLElementEventMap["input"]) { |
| | | let term = (e.target as HTMLInputElement).value |
| | | let searchResults: FlexSearch.SimpleDocumentSearchResultSetUnit[] |
| | | |
| | | if (term.toLowerCase().startsWith("#")) { |
| | | searchType = "tags" |
| | | } else { |
| | | searchType = "basic" |
| | | } |
| | | |
| | | switch (searchType) { |
| | | case "tags": { |
| | | term = term.substring(1) |
| | | searchResults = |
| | | (await index?.searchAsync({ query: term, limit: numSearchResults, index: ["tags"] })) ?? |
| | | [] |
| | | break |
| | | } |
| | | case "basic": |
| | | default: { |
| | | searchResults = |
| | | (await index?.searchAsync({ |
| | | query: term, |
| | | limit: numSearchResults, |
| | | index: ["title", "content"], |
| | | })) ?? [] |
| | | } |
| | | } |
| | | |
| | | 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"), |
| | | ...getByField("tags"), |
| | | ]) |
| | | const finalResults = [...allIds].map((id) => formatForDisplay(term, id)) |
| | | displayResults(finalResults) |
| | | } |
| | | |
| | | document.removeEventListener("keydown", shortcutHandler) |
| | | if (prevShortcutHandler) { |
| | | document.removeEventListener("keydown", prevShortcutHandler) |
| | | } |
| | | |
| | | document.addEventListener("keydown", shortcutHandler) |
| | | searchIcon?.removeEventListener("click", showSearch) |
| | | searchIcon?.addEventListener("click", showSearch) |
| | | prevShortcutHandler = shortcutHandler |
| | | searchIcon?.removeEventListener("click", () => showSearch("basic")) |
| | | searchIcon?.addEventListener("click", () => showSearch("basic")) |
| | | searchBar?.removeEventListener("input", onType) |
| | | searchBar?.addEventListener("input", onType) |
| | | |
| | | // setup index if it hasn't been already |
| | | if (!index) { |
| | | index = new FlexSearch.Document({ |
| | | charset: "latin:extra", |
| | | encode: encoder, |
| | | document: { |
| | | id: "id", |
| | | index: [ |
| | | { |
| | | field: "title", |
| | | tokenize: "forward", |
| | | }, |
| | | { |
| | | field: "content", |
| | | tokenize: "forward", |
| | | }, |
| | | { |
| | | field: "tags", |
| | | tokenize: "forward", |
| | | }, |
| | | ], |
| | | }, |
| | | }) |
| | | |
| | | fillDocument(index, data) |
| | | } |
| | | |
| | | // register handlers |
| | | registerEscapeHandler(container, hideSearch) |
| | | }) |
| | | |
| | | /** |
| | | * Fills flexsearch document with data |
| | | * @param index index to fill |
| | | * @param data data to fill index with |
| | | */ |
| | | async function fillDocument(index: FlexSearch.Document<Item, false>, data: any) { |
| | | 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, |
| | | tags: fileData.tags, |
| | | }) |
| | | id++ |
| | | } |
| | | } |