feat: support prev caveat in store/list and upload/list

this implements support for the `prev` caveat proposed in storacha/w3up#423 I'm not sure the semantics are right yet, deploying to get a test env to play with
storacha · Feb 6, 2023 · a5a3ffd · a5a3ffd
1 parent 46ae012
commit a5a3ffd
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Showing 5 changed files with 10 additions and 5 deletions.
diff --git a/upload-api/service/store/list.js b/upload-api/service/store/list.js
@@ -17,12 +17,13 @@ export function storeListProvider(context) {
   return Server.provide(
     Store.list,
     async ({ capability }) => {
-      const { cursor, size } = capability.nb
+      const { cursor, size, prev } = capability.nb
       const space = Server.DID.parse(capability.with).did()
 
       return await context.storeTable.list(space, {
         size,
-        cursor
+        cursor,
+        prev
       })
     }
   )

diff --git a/upload-api/service/types.ts b/upload-api/service/types.ts
@@ -116,7 +116,8 @@ export interface UploadListItem extends UploadAddResult {
 
 export interface ListOptions {
   size?: number,
-  cursor?: string
+  cursor?: string,
+  prev?: boolean
 }
 
 export interface ListResponse<R> {

diff --git a/upload-api/service/upload/list.js b/upload-api/service/upload/list.js
@@ -16,12 +16,13 @@ export function uploadListProvider(context) {
   return Server.provide(
     Upload.list,
     async ({ capability }) => {
-      const { cursor, size } = capability.nb
+      const { cursor, size, prev } = capability.nb
       const space = Server.DID.parse(capability.with).did()
 
       return await context.uploadTable.list(space, {
         size,
-        cursor
+        cursor,
+        prev
       })
   })
 }
diff --git a/upload-api/tables/store.js b/upload-api/tables/store.js
@@ -119,6 +119,7 @@ export function createStoreTable (region, tableName, options = {}) {
             AttributeValueList: [{ S: space }],
           },
         },
+        ScanIndexForward: options.prev ? false : true,
         ExclusiveStartKey: exclusiveStartKey,
         AttributesToGet: ['link', 'size', 'origin', 'insertedAt'],
       })

diff --git a/upload-api/tables/upload.js b/upload-api/tables/upload.js
@@ -143,6 +143,7 @@ export function createUploadTable (region, tableName, options = {}) {
             AttributeValueList: [{ S: space }],
           },
         },
+        ScanIndexForward: options.prev ? false : true,
         ExclusiveStartKey: exclusiveStartKey,
         AttributesToGet: ['space', 'root', 'shards', 'insertedAt', 'updatedAt'],
       })