@barnabask/astro-minisearch/dist/collections.js

Utilities to add a static full text index to an Astro project

/**
 * Converts an Astro content collection to an array of {@link types!SearchDocument}s.
 * Generally the first argument will be the output of
 * [`getCollection`](https://docs.astro.build/en/reference/api-reference/#getcollection).

 * @param collection - a content collection or a promise that will resolve to one
 * @param baseUrl - the absolute URL for the root of the collection when output
 *
 * @example
 * ```ts
 * collectionToDocuments(getCollection("blog"), "/blog/");
 * ```
 */
export async function collectionToDocuments(collection, baseUrl = "") {
    const documents = [];
    await Promise.all((await collection).map(async (entry) => {
        const { headings, remarkPluginFrontmatter: frontmatter } = await entry.render();
        const { plainText: textData, title, ...other } = frontmatter;
        let sections = [];
        if (typeof textData === "string") {
            // if plain text was a simple string, treat like an object with null key
            sections = [{ heading: "", text: textData }];
        }
        else if (Array.isArray(textData)) {
            sections = textData.map(([heading, text]) => {
                return { heading, text };
            });
        }
        const newDocs = sections.map(({ heading, text }) => {
            const entryUrl = new URL(baseUrl + entry.slug, "file://");
            if (heading) {
                entryUrl.hash = headings.find((h) => h.text === heading)?.slug || "";
            }
            const url = entryUrl.toString().substring(7); // strip off 'file://'
            return { url, title, heading, text, ...other };
        });
        documents.push(...newDocs);
    }));
    return documents;
}
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