Begin combining feed and api

app/feed.json/route.ts

@@ -1,11 +1,11 @@
 import { getPhotosCached } from '@/photo/cache';
 import { INFINITE_SCROLL_FEED_INITIAL } from '@/photo';
-import { formatPhotoForFeed } from '@/app/feed';
 import {
   BASE_URL,
   PUBLIC_FEED_ENABLED,
   META_TITLE,
 } from '@/app/config';
+import { formatPhotoForFeedJson } from '@/app/feed';
 
 export const dynamic = 'force-static';
 
@@ -20,7 +20,7 @@ export async function GET() {
         title: META_TITLE,
         url: BASE_URL,
       },
-      photos: photos.map(formatPhotoForFeed),
+      photos: photos.map(formatPhotoForFeedJson),
     });
   } else {
     return new Response('Feed disabled', { status: 404 });

src/app/feed.ts

@@ -1,17 +1,31 @@
-import { Photo } from '@/photo';
+import { descriptionForPhoto, Photo, titleForPhoto } from '@/photo';
 import { absolutePathForPhoto } from './paths';
-import { getNextImageUrlForRequest } from '@/platforms/next-image';
-import { formatDate } from '@/utility/date';
+import {
+  getNextImageUrlForRequest,
+  NextImageSize,
+} from '@/platforms/next-image';
+import { formatDate, formatDateFromPostgresString } from '@/utility/date';
 
-export const FEED_PHOTO_WIDTH_CONTENT = 1080;
-export const FEED_PHOTO_WIDTH_THUMB = 640;
+export const API_PHOTO_REQUEST_LIMIT = 40;
 
-export interface PublicFeed {
+export const FEED_PHOTO_WIDTH_SMALL = 200;
+export const FEED_PHOTO_WIDTH_MEDIUM = 640;
+export const FEED_PHOTO_WIDTH_LARGE = 1200;
+
+export interface PublicFeedJson {
   meta: {
     title: string
     url: string
   }
-  photos: PublicFeedPhoto[]
+  photos: PublicFeedPhotoJson[]
+}
+
+export interface PublicFeedRss {
+  meta: {
+    title: string
+    url: string
+  }
+  photos: PublicFeedPhotoRss[]
 }
 
 interface PublicFeedMedia {
@@ -20,7 +34,21 @@ interface PublicFeedMedia {
   height: number
 }
 
-interface PublicFeedPhoto {
+interface PublicFeedPhotoJson {
+  id: string
+  title?: string
+  url: string
+  make?: string
+  model?: string
+  tags?: string[]
+  takenAtNaive: string
+  src: Record<
+    'small' | 'medium' | 'large',
+    PublicFeedMedia
+  >
+}
+
+interface PublicFeedPhotoRss {
   id: string
   title?: string
   description?: string
@@ -32,48 +60,58 @@ interface PublicFeedPhoto {
   >
 }
 
-export const formatPhotoForFeed = (photo: Photo): PublicFeedPhoto => ({
+const generateFeedMedia = (
+  photo: Photo,
+  size: NextImageSize,
+): PublicFeedMedia => ({
+  url: getNextImageUrlForRequest({ imageUrl: photo.url, size }),
+  width: size,
+  height: Math.round(size / photo.aspectRatio),
+});
+
+const getCoreFeedFields = (photo: Photo) => ({
   id: photo.id,
-  title: photo.title,
-  description: photo.caption,
-  link: absolutePathForPhoto({ photo }),
-  publicationDate: photo.createdAt,
-  media: {
-    content: {
-      url: getNextImageUrlForRequest({
-        imageUrl: photo.url,
-        size: FEED_PHOTO_WIDTH_CONTENT,
-      }),
-      width: FEED_PHOTO_WIDTH_CONTENT,
-      height: Math.round(FEED_PHOTO_WIDTH_CONTENT / photo.aspectRatio),
-    },
-    thumb: {
-      url: getNextImageUrlForRequest({
-        imageUrl: photo.url,
-        size: FEED_PHOTO_WIDTH_THUMB,
-      }),
-      width: FEED_PHOTO_WIDTH_THUMB,
-      height: Math.round(FEED_PHOTO_WIDTH_THUMB / photo.aspectRatio),
-    },
+  title: titleForPhoto(photo),
+  description: descriptionForPhoto(photo),
+});
+
+export const formatPhotoForFeedJson = (photo: Photo): PublicFeedPhotoJson => ({
+  ...getCoreFeedFields(photo),
+  url: absolutePathForPhoto({ photo }),
+  ...photo.make && { make: photo.make },
+  ...photo.model && { model: photo.model },
+  ...photo.tags.length > 0 && { tags: photo.tags },
+  takenAtNaive: formatDateFromPostgresString(photo.takenAtNaive),
+  src: {
+    small: generateFeedMedia(photo, FEED_PHOTO_WIDTH_SMALL),
+    medium: generateFeedMedia(photo, FEED_PHOTO_WIDTH_MEDIUM),
+    large: generateFeedMedia(photo, FEED_PHOTO_WIDTH_LARGE),
   },
 });
 
-export const feedPhotoToXml = (photo: PublicFeedPhoto): string => {
+export const formatPhotoForFeedRss = (photo: Photo): PublicFeedPhotoRss => ({
+  ...getCoreFeedFields(photo),
+  link: absolutePathForPhoto({ photo }),
+  publicationDate: photo.createdAt,
+  media: {
+    content: generateFeedMedia(photo, FEED_PHOTO_WIDTH_LARGE),
+    thumb: generateFeedMedia(photo, FEED_PHOTO_WIDTH_MEDIUM),
+  },
+});
+
+export const feedPhotoToXml = (photo: PublicFeedPhotoRss): string => {
   const formattedDate = formatDate({
     date: photo.publicationDate,
     length: 'rss',
   });
-  const description = photo.description ?
-    `<description>
-      <![CDATA[${photo.description}]]>
-    </description>` : '';
-
   return `<item>
     <title>${photo.title}</title>
     <link>${photo.link}</link>
     <pubDate>${formattedDate}</pubDate>
     <guid isPermaLink="true">${photo.link}</guid>
-        ${description}
+    <description>
+      <![CDATA[${photo.description}]]>
+    </description>
     <media:content url="${photo.media.content.url.replace(/&/g, '&amp;')}"
       type="image/jpeg"
       medium="image"