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pages.ts
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pages.ts
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import { fm, path, fs } from "./deps/std.ts";
import { slug as slugify } from "./deps/slug.ts";
import * as attributes from "./attributes.ts";
import { parseMarkdown } from "./markdown.ts";
import type {
Crumb,
Heading,
JSONValue,
Page,
PageData,
UserConfig,
} from "./types.d.ts";
interface GeneratePageOpts {
entry: fs.WalkEntry;
inputPath: string;
userConfig: UserConfig;
ignoreKeys: string[];
}
const decoder = new TextDecoder("utf-8");
function generateCrumbs(page: Page, rootCrumb?: string): Crumb[] {
const chunks = page.url.pathname.split("/").filter((ch) => !!ch);
const crumbs: Crumb[] = chunks.map((chunk, i) => {
const url = path.join("/", ...chunks.slice(0, i + 1));
return {
slug: chunk,
url,
current: url === page.url.pathname,
};
});
crumbs.unshift({
slug: rootCrumb ?? "index",
url: "/",
current: page.url.pathname === "/",
});
return crumbs;
}
function getTitleFromHeadings(headings: Array<Heading>): string | undefined {
return headings.find((h) => h.level === 1)?.text;
}
function getTitleFromFilename(filePath: string): string {
return path.basename(filePath).replace(path.extname(filePath), "");
}
function getDateFromFilename(filePath: string): Date | undefined {
const match = path.basename(filePath).match(/\d{4}-\d{2}-\d{2}/)?.[0];
if (!match) {
return;
}
const [year, month, day] = match.split("-");
const date = new Date(`${year}-${month}-${day}`);
if (date instanceof Date && !isNaN(date.valueOf())) {
return date;
}
}
function getBacklinkPages(pages: Page[], current: Page): Page[] {
const pageSet: Set<Page> = new Set();
for (const outPage of pages) {
if (outPage.links) {
for (const url of outPage.links) {
if (
outPage.url.pathname !== current.url.pathname &&
url.pathname === current.url.pathname
) {
pageSet.add(outPage);
}
}
}
}
return [...pageSet];
}
function getTags(pages: Page[]): string[] {
const tagSet: Set<string> = new Set();
pages.forEach((p) => p.tags?.forEach((tag) => tagSet.add(tag)));
return [...tagSet];
}
function getPagesWithTag(pages: Page[], tag: string, exclude?: Page[]): Page[] {
return pages.filter(
(page) => page.tags?.includes(tag) && !exclude?.includes(page)
);
}
function getRelatedPages(pages: Page[], current: Page): Page[] {
return pages.filter(
(page) =>
page.url.pathname !== current.url.pathname &&
page?.tags?.some((tag) => current?.tags?.includes(tag))
);
}
function getChildPages(
pages: Page[],
current: Page
): { childPages: Page[]; allChildPages: Page[] } {
const childPages: Page[] = [];
const allChildPages: Page[] = [];
pages.forEach((p) => {
if (current.url.pathname !== p.url.pathname) {
if (current.url.pathname === path.dirname(p.url.pathname)) {
childPages.push(p);
} else if (p.url.pathname.startsWith(current.url.pathname)) {
allChildPages.push(p);
}
}
});
return { childPages, allChildPages };
}
function getPagesByTags(
pages: Page[],
tags: string[],
exclude?: Page[]
): Record<string, Page[]> {
const pageMap: Record<string, Page[]> = {};
tags.forEach((tag) => {
pageMap[tag] = getPagesWithTag(pages, tag, exclude);
});
return pageMap;
}
function sortPages(pages: Page[]): Page[] {
return pages
.toSorted((a, b) => {
if (a.datePublished && b.datePublished) {
return b.datePublished.valueOf() - a.datePublished.valueOf();
} else if (a.datePublished) {
return -1;
} else if (b.datePublished) {
return 1;
} else {
return 0;
}
})
.toSorted((page) => (page.index === "dir" ? -1 : 0))
.toSorted((page) => (page.pinned ? -1 : 0));
}
function sortTaggedPages(
taggedPages: Record<string, Page[]>
): Record<string, Page[]> {
return Object.keys(taggedPages)
.sort((a, b) => taggedPages[b].length - taggedPages[a].length)
.reduce((acc: Record<string, Page[]>, key) => {
acc[key] = taggedPages[key];
return acc;
}, {});
}
function getDeadlinks(pages: Page[]): [from: URL, to: URL][] {
return pages.reduce((deadlinks: [from: URL, to: URL][], page) => {
if (page.links) {
page.links.forEach((link) => {
!pages.some((page) => page.url.pathname === link.pathname) &&
deadlinks.push([page.url, link]);
});
}
return deadlinks;
}, []);
}
function extractPageData(raw: string, ignoreKeys: string[]): PageData {
const frontmatter = fm.extract(raw);
const attrs = frontmatter.attrs as JSONValue;
const {
getTitle,
getDescription,
getDate,
getDateUpdated,
getBool,
getTags,
getVal,
hasKey,
} = attributes;
return {
attrs,
body: frontmatter.body,
title: getTitle(attrs),
datePublished: getDate(attrs),
dateUpdated: getDateUpdated(attrs),
description: getDescription(attrs),
tags: getTags(attrs),
pinned: getBool(attrs, "pinned") ?? false,
ignored: hasKey(attrs, ignoreKeys),
unlisted: getBool(attrs, "unlisted") ?? false,
layout: (getVal(attrs, "layout") as "log" | "grid" | "list") || undefined,
showHeader: getBool(attrs, "showHeader") ?? true,
showToc: getBool(attrs, "toc") ?? false,
thumbnailUrl: getVal(attrs, "thumbnailUrl") as URL | undefined,
};
}
function generateIndexPageFromDir({
entry,
inputPath,
userConfig,
}: GeneratePageOpts): Page {
const { url } = userConfig;
const relPath = path.relative(inputPath, entry.path) || ".";
const slug = relPath === "." ? "." : slugify(entry.name);
const pageUrl = new URL(path.join(path.dirname(relPath), slug), url);
return {
title: entry.name,
url: pageUrl,
index: "dir",
};
}
function generateContentPage({
entry,
inputPath,
userConfig,
ignoreKeys,
}: GeneratePageOpts): Page {
const { url } = userConfig;
const relPath = path.relative(inputPath, entry.path);
const raw = decoder.decode(Deno.readFileSync(entry.path));
const name = entry.name
.replace(/^\d{4}-\d{2}-\d{2}[-_]/, "")
.replace(/\.md$/i, "");
const slug = slugify(name, { lower: true });
const pageUrl = new URL(path.join(path.dirname(relPath), slug), url);
let page: Page = {
url: pageUrl,
};
if (fm.test(raw)) {
page = { ...page, ...extractPageData(raw, ignoreKeys) };
}
const { html, links, headings } = parseMarkdown({
text: page.body ?? raw,
currentPath: relPath,
baseUrl: new URL(url),
isDirIndex: page.index === "dir",
codeHighlight: userConfig.codeHighlight,
});
page = { ...page, html, links, headings };
page.title ??=
getTitleFromHeadings(headings) || getTitleFromFilename(relPath);
page.datePublished ??= getDateFromFilename(entry.name);
return page;
}
function generateIndexPageFromFile({
entry,
inputPath,
userConfig,
ignoreKeys,
}: GeneratePageOpts): Page {
const { url } = userConfig;
const relPath = path.relative(inputPath, path.dirname(entry.path)) || ".";
const raw = decoder.decode(Deno.readFileSync(entry.path));
const dirName = path.basename(path.dirname(entry.path));
const slug = relPath === "." ? "." : slugify(dirName);
const pageUrl = new URL(path.join(path.dirname(relPath), slug), url);
let page: Page = {
url: pageUrl,
index: "dir",
};
if (fm.test(raw)) {
page = { ...page, ...extractPageData(raw, ignoreKeys) };
}
const { html, links, headings } = parseMarkdown({
text: page.body ?? raw,
currentPath: relPath,
baseUrl: new URL(url),
codeHighlight: userConfig.codeHighlight,
});
page = { ...page, html, links, headings };
page.title ??=
getTitleFromHeadings(headings) || getTitleFromFilename(dirName);
page.datePublished ??= getDateFromFilename(entry.name);
return page;
}
export {
generateContentPage,
generateCrumbs,
generateIndexPageFromDir,
generateIndexPageFromFile,
getBacklinkPages,
getTitleFromHeadings,
getTitleFromFilename,
getChildPages,
getDeadlinks,
getPagesByTags,
getPagesWithTag,
getRelatedPages,
getDateFromFilename,
getTags,
sortPages,
sortTaggedPages,
extractPageData,
};