54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
import { events } from "$sb/syscalls.ts";
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import { replaceTemplateVars } from "../template/template.ts";
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import { renderTemplate } from "./util.ts";
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import { parseQuery } from "./parser.ts";
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import { jsonToMDTable } from "./util.ts";
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import { ParseTree } from "$sb/lib/tree.ts";
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import type { PageMeta } from "../../web/types.ts";
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export async function queryDirectiveRenderer(
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_directive: string,
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pageMeta: PageMeta,
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query: string | ParseTree,
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): Promise<string> {
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if (typeof query === "string") {
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throw new Error("Argument must be a ParseTree");
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}
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const parsedQuery = parseQuery(
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JSON.parse(replaceTemplateVars(JSON.stringify(query), pageMeta)),
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);
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const eventName = `query:${parsedQuery.table}`;
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// console.log("Parsed query", parsedQuery);
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// Let's dispatch an event and see what happens
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const results = await events.dispatchEvent(
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eventName,
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{ query: parsedQuery, pageName: pageMeta.name },
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30 * 1000,
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);
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if (results.length === 0) {
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// This means there was no handler for the event which means it's unsupported
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return `**Error:** Unsupported query source '${parsedQuery.table}'`;
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} else if (results.length === 1) {
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// console.log("Parsed query", parsedQuery);
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if (parsedQuery.render) {
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const rendered = await renderTemplate(
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pageMeta,
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parsedQuery.render,
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results[0],
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);
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return rendered.trim();
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} else {
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if (results[0].length === 0) {
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return "No results";
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} else {
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return jsonToMDTable(results[0]);
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}
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}
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} else {
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throw new Error(`Too many query results: ${results.length}`);
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}
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}
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