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pages.ts
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pages.ts
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import { WalkEntry } from "./deps.ts";
import { basename, dirname, extname, join, relative } from "./deps.ts";
import { fm } from "./deps.ts";
import { slugify } from "./deps.ts";
import { render } from "./render.ts";
import * as attrs from "./attributes.ts";
import { SiteConfig } from "./config.ts";
import { INDEX_FILENAME } from "./entries.ts";
const decoder = new TextDecoder("utf-8");
export interface Heading {
text: string;
level: 1 | 2 | 3 | 4 | 5 | 6;
slug: string;
}
export interface Page {
url: URL;
path?: string;
title: string;
attrs: attrs.PageAttributes;
links: Array<URL>;
isIndex: boolean;
description?: string;
date?: Date | null;
body?: string;
html?: string;
tags?: Array<string>;
headings?: Array<Heading>;
}
export interface TagPage {
name: string;
pages: Array<Page>;
}
export function isDeadLink(allPages: Array<Page>, linkUrl: URL): boolean {
for (const page of allPages) {
if (page.url.pathname === linkUrl.pathname) {
return false;
} else {
continue;
}
}
return true;
}
const getTitleFromHeadings = (headings: Array<Heading>): string | undefined => {
for (const h of headings) {
if (h.level === 1) {
return h.text;
}
}
};
const getTitleFromFilename = (filePath: string): string => {
return basename(filePath).replace(extname(filePath), "");
};
async function _getLastCommitDate(path: string): Promise<Date | undefined> {
const opts: Deno.RunOptions = {
cmd: ["git", "log", "-1", "--format=%as", "--", path],
stdout: "piped",
stderr: "piped",
};
const process = Deno.run(opts);
const { success } = await process.status();
if (success) {
const timestamp = Date.parse(decoder.decode(await process.output()));
if (!isNaN(timestamp)) return new Date(timestamp);
}
}
export function getAllTags(pages: Array<Page>): Array<string> {
const tags: Set<string> = new Set();
pages.forEach((page) => {
attrs.getTags(page.attrs).forEach((tag: string) => tags.add(tag));
});
return [...tags];
}
export function getPagesByTag(allPages: Array<Page>, tag: string): Array<Page> {
return allPages.filter((page) => attrs.getTags(page.attrs).includes(tag));
}
export function getBacklinkPages(
allPages: Array<Page>,
current: Page,
): Array<Page> {
const pages: Set<Page> = new Set();
for (const outPage of allPages) {
for (const url of outPage.links) {
if (
outPage.url.pathname !== current.url.pathname &&
url.pathname === current.url.pathname
) {
pages.add(outPage);
}
}
}
return [...pages];
}
export function getChildPages(
allPages: Array<Page>,
current: Page,
): Array<Page> {
const pages = allPages.filter((p) =>
current.url.pathname !== p.url.pathname &&
current.url.pathname === dirname(p.url.pathname)
);
return pages;
}
export function getChildTags(
allPages: Array<Page>,
current: Page,
): Array<string> {
const tags: Set<string> = new Set();
allPages.forEach((page) => {
if (page.url.pathname.startsWith(current.url.pathname)) {
page.tags?.forEach((tag) => tags.add(tag));
}
});
return [...tags];
}
export async function generatePage(
entry: WalkEntry,
inputPath: string,
site: SiteConfig,
): Promise<Page> {
if (entry.isFile && entry.name !== INDEX_FILENAME) {
const relPath = relative(inputPath, entry.path);
const isIndex = false;
const content = decoder.decode(await Deno.readFile(entry.path));
const parsed = fm(content);
const pageAttrs = parsed.attributes as attrs.PageAttributes;
const body = parsed.body;
const date = attrs.getDate(pageAttrs);
const { html, links, headings } = render(
body,
relPath,
isIndex,
new URL(site.url),
);
const slug = slugify(entry.name.replace(/\.md$/i, ""), { lower: true });
const title = attrs.getTitle(pageAttrs) ||
getTitleFromHeadings(headings) || getTitleFromFilename(relPath);
const description = attrs.getDescription(pageAttrs) || "";
const tags = attrs.getTags(pageAttrs);
const url = new URL(join(dirname(relPath), slug), site.url);
return {
attrs: pageAttrs,
path: relPath,
url,
body,
html,
links,
headings,
title,
description,
tags,
date,
isIndex,
};
} else if (entry.isFile && entry.name === INDEX_FILENAME) {
const relPath = relative(inputPath, dirname(entry.path)) || ".";
const name = basename(dirname(entry.path));
const slug = relPath === "." ? "." : slugify(name);
const isIndex = true;
const content = decoder.decode(await Deno.readFile(entry.path));
const parsed = fm(content);
const pageAttrs = parsed.attributes as attrs.PageAttributes;
const body = parsed.body;
const { html, links, headings } = render(
body,
relPath,
isIndex,
new URL(site.url),
);
const title = attrs.getTitle(pageAttrs) || getTitleFromHeadings(headings) ||
name;
const description = attrs.getDescription(pageAttrs) || "";
const tags = attrs.getTags(pageAttrs);
const url = new URL(join(dirname(relPath), slug), site.url);
return {
attrs: pageAttrs,
url,
body,
html,
links,
headings,
title,
description,
tags,
isIndex,
};
} else if (entry.isDirectory) {
const relPath = relative(inputPath, entry.path) || ".";
const slug = relPath === "." ? "." : slugify(entry.name);
const isIndex = true;
const url = new URL(join(dirname(relPath), slug), site.url);
return {
title: entry.name,
attrs: {},
url,
isIndex,
links: [],
};
} else {
return Promise.reject();
}
}