Awesome frontmatter (#617)

Live Frontmatter Templates

plugs/template/types.ts

@@ -1,11 +1,17 @@
 import { ObjectValue } from "$sb/types.ts";
 
 export type TemplateFrontmatter = {
-  trigger?: string; // slash command name
   displayName?: string;
   type?: "page";
   // Frontmatter can be encoded as an object (in which case we'll serialize it) or as a string
   frontmatter?: Record<string, any> | string;
+
+  // Specific for slash templates
+  trigger?: string;
+
+  // Specific for frontmatter templates
+  where?: string; // expression (SB query style)
+  priority?: number; // When multiple templates match, the one with the highest priority is used
 };
 
 export type TemplateObject = ObjectValue<TemplateFrontmatter>;

plugs/template/util.ts

@@ -36,20 +36,27 @@ export function buildHandebarOptions(pageMeta: PageMeta) {
   };
 }
 
-export function defaultJsonTransformer(_k: string, v: any) {
+export function defaultJsonTransformer(v: any): string {
   if (v === undefined) {
     return "";
   }
   if (typeof v === "string") {
     return v.replaceAll("\n", " ").replaceAll("|", "\\|");
   }
+  if (Array.isArray(v)) {
+    return v.map(defaultJsonTransformer).join(", ");
+  } else if (typeof v === "object") {
+    return Object.entries(v).map(([k, v]: [string, any]) =>
+      `${k}: ${defaultJsonTransformer(v)}`
+    ).join(", ");
+  }
   return "" + v;
 }
 
 // Nicely format an array of JSON objects as a Markdown table
 export function jsonToMDTable(
   jsonArray: any[],
-  valueTransformer: (k: string, v: any) => string = defaultJsonTransformer,
+  valueTransformer: (v: any) => string = defaultJsonTransformer,
 ): string {
   const headers = new Set<string>();
   for (const entry of jsonArray) {
@@ -79,7 +86,7 @@ export function jsonToMDTable(
   for (const val of jsonArray) {
     const el = [];
     for (const prop of headerList) {
-      const s = valueTransformer(prop, val[prop]);
+      const s = valueTransformer(val[prop]);
       el.push(s);
     }
     lines.push("|" + el.join("|") + "|");