Merge pull request #111 from Permissionless-Software-Foundation/dh-pagination

feat(NFTs): Added pagination controls for NFTs

src/use-cases/offer/index.js

@@ -267,7 +267,7 @@ class OfferUseCases {
     }
   }
 
-  async listNftOffers (page = 0, nsfw = false) {
+  /*   async listNftOffers (page = 0, nsfw = false) {
     try {
       const data = await this.OfferModel.find({
         displayCategory: { $ne: 'fungible' },
@@ -287,6 +287,42 @@ class OfferUseCases {
       console.error('Error in use-cases/offer/listNftOffers()')
       throw error
     }
+  } */
+
+  async listNftOffers (page = 0, nsfw = false) {
+    try {
+      const query = {
+        displayCategory: { $ne: 'fungible' },
+        nsfw
+      }
+      // Total query offers
+      const totalOffers = await this.OfferModel.countDocuments(query)
+      // Total pages
+      const totalPages = Math.ceil(totalOffers / NFT_ENTRIES_PER_PAGE)
+
+      const data = await this.OfferModel.find(query)
+        // Sort entries so newest entries show first.
+        .sort('-timestamp')
+        // Skip to the start of the selected page.
+        .skip(page * NFT_ENTRIES_PER_PAGE)
+        // Only return 20 results.
+        .limit(NFT_ENTRIES_PER_PAGE)
+
+      // console.log('listNftOffers() returning this data: ', data)
+
+      return {
+        data,
+        pagination: {
+          currentPage: page,
+          totalPages,
+          totalOffers,
+          pageSize: NFT_ENTRIES_PER_PAGE
+        }
+      }
+    } catch (error) {
+      console.error('Error in use-cases/offer/listNftOffers()')
+      throw error
+    }
   }
 
   async listFungibleOffers (page = 0) {

test/unit/mocks/adapters/index.js

@@ -149,7 +149,7 @@ const localdb = {
     static findById () {}
     static find () {}
     static findOne () {}
-
+    static countDocuments(){}
     async save () {
       return {}
     }

test/unit/use-cases/offer.use-case.unit.js

@@ -400,7 +400,7 @@ describe('#offer-use-case', () => {
       }
     })
 
-    it('should list orders', async () => {
+    it('should list offers', async () => {
       const queryMock = {
         sort () {
           return this
@@ -414,7 +414,11 @@ describe('#offer-use-case', () => {
       sandbox.stub(uut.OfferModel, 'find').returns(queryMock)
 
       const result = await uut.listNftOffers(1, true)
-      assert.isArray(result)
+      assert.isObject(result)
+      assert.property(result, 'data')
+      assert.property(result, 'pagination')
+      assert.isArray(result.data)
+      assert.isObject(result.pagination)
     })
   })