Add feature to want() missing blobs

src/pages/image.js

@@ -12,8 +12,9 @@ module.exports = async function imagePage ({ blobId, imageSize }) {
   return new Promise((resolve) => {
     pull(
       bufferSource,
-      pull.collect((err, bufferArray) => {
+      pull.collect(async (err, bufferArray) => {
         if (err) {
+          await blob.want({ blobId })
           sharp({
             create: {
               width: imageSize,

src/pages/models/blob.js

@@ -8,5 +8,10 @@ module.exports = {
     debug('requested blob: %s', blobId)
     const ssb = await cooler.connect()
     return cooler.read(ssb.blobs.get, blobId)
+  },
+  want: async ({ blobId }) => {
+    debug('requested blob: %s', blobId)
+    const ssb = await cooler.connect()
+    return cooler.get(ssb.blobs.want, blobId)
   }
 }

src/pages/models/lib/cooler.js

@@ -12,8 +12,9 @@ const rawConnect = () => new Promise((resolve, reject) => {
     manifest: {
       about: { socialValue: 'async' },
       backlinks: { read: 'source' },
-      blobs: { get: 'source' },
+      blobs: { get: 'source', want: 'async' },
       createUserStream: 'source',
+      createHistoryStream: 'source',
       get: 'sync',
       messagesByType: 'source',
       publish: 'async',