Work to reduce bundles size (prebundle modules)

plugs/core/template.ts

@@ -0,0 +1,51 @@
+import { listPages, readPage, writePage } from "plugos-silverbullet-syscall/space";
+import { filterBox, navigate, prompt } from "plugos-silverbullet-syscall/editor";
+import { parseMarkdown } from "plugos-silverbullet-syscall/markdown";
+import { extractMeta } from "../query/data";
+import { renderToText } from "../../common/tree";
+import { niceDate } from "./dates";
+
+const pageTemplatePrefix = `template/page/`;
+
+export async function instantiateTemplateCommand() {
+  let allPages = await listPages();
+  let allPageTemplates = allPages.filter((pageMeta) =>
+    pageMeta.name.startsWith(pageTemplatePrefix)
+  );
+
+  let selectedTemplate = await filterBox(
+    "Template",
+    allPageTemplates,
+    "Select the template to create a new page from"
+  );
+
+  if (!selectedTemplate) {
+    return;
+  }
+  console.log("Selected template", selectedTemplate);
+
+  let { text } = await readPage(selectedTemplate.name);
+
+  let parseTree = await parseMarkdown(text);
+  let additionalPageMeta = extractMeta(parseTree, true);
+  console.log("Page meta", additionalPageMeta);
+
+  let pageName = await prompt("Name of new page", additionalPageMeta.name);
+  if (!pageName) {
+    return;
+  }
+  let pageText = replaceTemplateVars(renderToText(parseTree));
+  await writePage(pageName, pageText);
+  await navigate(pageName);
+}
+
+export function replaceTemplateVars(s: string): string {
+  return s.replaceAll(/\{\{(\w+)\}\}/g, (match, v) => {
+    switch (v) {
+      case "today":
+        return niceDate(new Date());
+        break;
+    }
+    return match;
+  });
+}