91027af5fe
Live Frontmatter Templates
111 lines
2.8 KiB
TypeScript
111 lines
2.8 KiB
TypeScript
import { determineTags } from "$sb/lib/cheap_yaml.ts";
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import { handlebarHelpers } from "../../common/syscalls/handlebar_helpers.ts";
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import { PageMeta } from "$sb/types.ts";
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import { handlebars, space } from "$sb/syscalls.ts";
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import { cleanTemplate } from "./plug_api.ts";
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const frontMatterRegex = /^---\n(([^\n]|\n)*?)---\n/;
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/**
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* Quick and dirty way to check if a page is a template or not
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* @param pageText
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* @returns
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*/
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export function isTemplate(pageText: string): boolean {
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const frontmatter = frontMatterRegex.exec(pageText);
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// Poor man's YAML frontmatter parsing
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if (frontmatter) {
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pageText = pageText.slice(frontmatter[0].length);
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const frontmatterText = frontmatter[1];
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const tags = determineTags(frontmatterText);
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if (tags.includes("template")) {
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return true;
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}
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}
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// Or if the page text starts with a #template tag
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if (/^\s*#template(\W|$)/.test(pageText)) {
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return true;
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}
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return false;
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}
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export function buildHandebarOptions(pageMeta: PageMeta) {
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return {
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helpers: handlebarHelpers(),
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data: { page: pageMeta },
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};
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}
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export function defaultJsonTransformer(v: any): string {
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if (v === undefined) {
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return "";
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}
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if (typeof v === "string") {
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return v.replaceAll("\n", " ").replaceAll("|", "\\|");
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}
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if (Array.isArray(v)) {
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return v.map(defaultJsonTransformer).join(", ");
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} else if (typeof v === "object") {
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return Object.entries(v).map(([k, v]: [string, any]) =>
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`${k}: ${defaultJsonTransformer(v)}`
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).join(", ");
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}
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return "" + v;
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}
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// Nicely format an array of JSON objects as a Markdown table
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export function jsonToMDTable(
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jsonArray: any[],
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valueTransformer: (v: any) => string = defaultJsonTransformer,
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): string {
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const headers = new Set<string>();
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for (const entry of jsonArray) {
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for (const k of Object.keys(entry)) {
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headers.add(k);
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}
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}
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const headerList = [...headers];
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const lines = [];
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lines.push(
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"|" +
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headerList
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.map(
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(headerName) => headerName,
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)
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.join("|") +
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"|",
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);
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lines.push(
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"|" +
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headerList
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.map(() => "--")
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.join("|") +
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"|",
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);
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for (const val of jsonArray) {
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const el = [];
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for (const prop of headerList) {
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const s = valueTransformer(val[prop]);
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el.push(s);
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}
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lines.push("|" + el.join("|") + "|");
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}
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return lines.join("\n");
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}
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export async function renderQueryTemplate(
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pageMeta: PageMeta,
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templatePage: string,
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data: any[],
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renderAll: boolean,
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): Promise<string> {
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let templateText = await space.readPage(templatePage);
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templateText = await cleanTemplate(templateText);
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if (!renderAll) {
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templateText = `{{#each .}}\n${templateText}\n{{/each}}`;
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}
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return handlebars.renderTemplate(templateText, data, { page: pageMeta });
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}
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