content-collections.ts

import { defineCollection, defineConfig } from '@content-collections/core'
import { libraryIds } from '~/libraries/libraries'
import { normalizeRedirectFrom } from '~/utils/redirects'
import { z } from 'zod'

const libraryIdSet = new Set<string>(libraryIds)
const libraryListSchema = z.string().refine(
  (value) => {
    const libraries = value
      .split(',')
      .map((library) => library.trim())
      .filter(Boolean)

    return (
      libraries.length > 0 &&
      libraries.every((library) => libraryIdSet.has(library))
    )
  },
  {
    message: `Expected comma-separated library ids: ${libraryIds.join(', ')}`,
  },
)

const posts = defineCollection({
  name: 'posts',
  directory: './src/blog',
  include: '*.md',
  schema: z.object({
    title: z.string(),
    published: z.iso.date(),
    draft: z.boolean().optional(),
    excerpt: z.string(),
    authors: z.string().array(),
    library: libraryListSchema.optional(),
    content: z.string(),
    redirect_from: z.string().array().optional(),
  }),
  transform: ({ content, ...post }) => {
    // Extract header image (first image after frontmatter)
    const headerImageMatch = content.match(/!\[([^\]]*)\]\(([^)]+)\)/)
    const headerImage = headerImageMatch ? headerImageMatch[2] : undefined
    const redirectFrom = normalizeRedirectFrom(post.redirect_from)

    return {
      ...post,
      slug: post._meta.path,
      headerImage,
      redirect_from: redirectFrom,
      redirectFrom,
      content,
    }
  },
})

export default defineConfig({
  content: [posts],
})