Initial commit

quartz/plugins/loader/conditions.ts

@@ -0,0 +1,33 @@
+import { QuartzComponentProps } from "../../components/types"
+
+export type ConditionPredicate = (props: QuartzComponentProps) => boolean
+
+const builtinConditions: Record<string, ConditionPredicate> = {
+  "not-index": (props) => props.fileData.slug !== "index",
+  "has-tags": (props) => {
+    const tags = props.fileData.frontmatter?.tags
+    return Array.isArray(tags) && tags.length > 0
+  },
+  "has-backlinks": (props) => {
+    const backlinks = (props.fileData as Record<string, unknown>).backlinks
+    return Array.isArray(backlinks) && backlinks.length > 0
+  },
+  "has-toc": (props) => {
+    const toc = (props.fileData as Record<string, unknown>).toc
+    return Array.isArray(toc) && toc.length > 0
+  },
+}
+
+const customConditions = new Map<string, ConditionPredicate>()
+
+export function registerCondition(name: string, predicate: ConditionPredicate): void {
+  customConditions.set(name, predicate)
+}
+
+export function getCondition(name: string): ConditionPredicate | undefined {
+  return customConditions.get(name) ?? builtinConditions[name]
+}
+
+export function getAllConditionNames(): string[] {
+  return [...Object.keys(builtinConditions), ...customConditions.keys()]
+}