Refactor transactions page

As we did in other pages, we removed the infinite scroll and make the
first load async.

apps/block_scout_web/assets/__tests__/pages/transactions.js

@@ -13,76 +13,63 @@ test('CHANNEL_DISCONNECTED', () => {
 
 describe('RECEIVED_NEW_TRANSACTION_BATCH', () => {
   test('single transaction', () => {
-    const state = initialState
+    const state = Object.assign({}, initialState, { items: [] })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
       msgs: [{
-        transactionHtml: 'test'
+        transactionHtml: 'transaction_html'
       }]
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([{ transactionHtml: 'test' }])
+    expect(output.items).toEqual(['transaction_html'])
     expect(output.transactionsBatch.length).toEqual(0)
     expect(output.transactionCount).toEqual(1)
   })
+
   test('large batch of transactions', () => {
-    const state = initialState
+    const state = Object.assign({}, initialState, { items: [] })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
-      msgs: [{
-        transactionHtml: 'test 1'
-      },{
-        transactionHtml: 'test 2'
-      },{
-        transactionHtml: 'test 3'
-      },{
-        transactionHtml: 'test 4'
-      },{
-        transactionHtml: 'test 5'
-      },{
-        transactionHtml: 'test 6'
-      },{
-        transactionHtml: 'test 7'
-      },{
-        transactionHtml: 'test 8'
-      },{
-        transactionHtml: 'test 9'
-      },{
-        transactionHtml: 'test 10'
-      },{
-        transactionHtml: 'test 11'
-      }]
+      msgs: [
+        { transactionHtml: 'transaction_html_1' },
+        { transactionHtml: 'transaction_html_2' },
+        { transactionHtml: 'transaction_html_3' },
+        { transactionHtml: 'transaction_html_4' },
+        { transactionHtml: 'transaction_html_5' },
+        { transactionHtml: 'transaction_html_6' },
+        { transactionHtml: 'transaction_html_7' },
+        { transactionHtml: 'transaction_html_8' },
+        { transactionHtml: 'transaction_html_9' },
+        { transactionHtml: 'transaction_html_10' },
+        { transactionHtml: 'transaction_html_11' },
+      ]
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([])
+    expect(output.items).toEqual([])
     expect(output.transactionsBatch.length).toEqual(11)
     expect(output.transactionCount).toEqual(11)
   })
+
   test('single transaction after single transaction', () => {
-    const state = Object.assign({}, initialState, {
-      transactions: [{
-        transactionHtml: 'test 1'
-      }]
-    })
+    const state = Object.assign({}, initialState, { items: [ 'transaction_html' ] })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
       msgs: [{
-        transactionHtml: 'test 2'
+        transactionHtml: 'another_transaction_html'
       }]
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([
-      { transactionHtml: 'test 2' },
-      { transactionHtml: 'test 1' }
-    ])
+    expect(output.items).toEqual([ 'another_transaction_html', 'transaction_html' ])
     expect(output.transactionsBatch.length).toEqual(0)
   })
+
   test('single transaction after large batch of transactions', () => {
     const state = Object.assign({}, initialState, {
-      transactionsBatch: [1,2,3,4,5,6,7,8,9,10,11]
+      items: [],
+      transactionsBatch: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
     })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
@@ -92,57 +79,51 @@ describe('RECEIVED_NEW_TRANSACTION_BATCH', () => {
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([])
+    expect(output.items).toEqual([])
     expect(output.transactionsBatch.length).toEqual(12)
   })
+
   test('large batch of transactions after large batch of transactions', () => {
     const state = Object.assign({}, initialState, {
-      transactionsBatch: [1,2,3,4,5,6,7,8,9,10,11]
+      items: [],
+      transactionsBatch: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
     })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
-      msgs: [{
-        transactionHtml: 'test 12'
-      },{
-        transactionHtml: 'test 13'
-      },{
-        transactionHtml: 'test 14'
-      },{
-        transactionHtml: 'test 15'
-      },{
-        transactionHtml: 'test 16'
-      },{
-        transactionHtml: 'test 17'
-      },{
-        transactionHtml: 'test 18'
-      },{
-        transactionHtml: 'test 19'
-      },{
-        transactionHtml: 'test 20'
-      },{
-        transactionHtml: 'test 21'
-      },{
-        transactionHtml: 'test 22'
-      }]
+      msgs: [
+        { transactionHtml: 'transaction_html_12' },
+        { transactionHtml: 'transaction_html_13' },
+        { transactionHtml: 'transaction_html_14' },
+        { transactionHtml: 'transaction_html_15' },
+        { transactionHtml: 'transaction_html_16' },
+        { transactionHtml: 'transaction_html_17' },
+        { transactionHtml: 'transaction_html_18' },
+        { transactionHtml: 'transaction_html_19' },
+        { transactionHtml: 'transaction_html_20' },
+        { transactionHtml: 'transaction_html_21' },
+        { transactionHtml: 'transaction_html_22' }
+      ]
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([])
+    expect(output.items).toEqual([])
     expect(output.transactionsBatch.length).toEqual(22)
   })
+
   test('after disconnection', () => {
     const state = Object.assign({}, initialState, {
+      items: [],
       channelDisconnected: true
     })
     const action = {
       type: 'RECEIVED_NEW_TRANSACTION_BATCH',
       msgs: [{
-        transactionHtml: 'test'
+        transactionHtml: 'transaction_html'
       }]
     }
     const output = reducer(state, action)
 
-    expect(output.transactions).toEqual([])
+    expect(output.items).toEqual([])
     expect(output.transactionsBatch.length).toEqual(0)
   })
 })

apps/block_scout_web/assets/js/pages/transactions.js

@@ -3,25 +3,19 @@ import _ from 'lodash'
 import humps from 'humps'
 import numeral from 'numeral'
 import socket from '../socket'
-import { createStore, connectElements } from '../lib/redux_helpers.js'
-import { withInfiniteScroll, connectInfiniteScroll } from '../lib/infinite_scroll_helpers'
+import { connectElements } from '../lib/redux_helpers'
+import { createAsyncLoadStore } from '../lib/async_listing_load'
 import { batchChannel } from '../lib/utils'
-import listMorph from '../lib/list_morph'
 
 const BATCH_THRESHOLD = 10
 
 export const initialState = {
   channelDisconnected: false,
-
   transactionCount: null,
-
-  transactions: [],
   transactionsBatch: []
 }
 
-export const reducer = withInfiniteScroll(baseReducer)
-
-function baseReducer (state = initialState, action) {
+export function reducer (state = initialState, action) {
   switch (action.type) {
     case 'ELEMENTS_LOAD': {
       return Object.assign({}, state, _.omit(action, 'type'))
@@ -33,15 +27,15 @@ function baseReducer (state = initialState, action) {
       })
     }
     case 'RECEIVED_NEW_TRANSACTION_BATCH': {
-      if (state.channelDisconnected) return state
+      if (state.channelDisconnected || state.beyondPageOne) return state
 
       const transactionCount = state.transactionCount + action.msgs.length
 
       if (!state.transactionsBatch.length && action.msgs.length < BATCH_THRESHOLD) {
         return Object.assign({}, state, {
-          transactions: [
-            ...action.msgs.reverse(),
-            ...state.transactions
+          items: [
+            ...action.msgs.map(msg => msg.transactionHtml).reverse(),
+            ...state.items
           ],
           transactionCount
         })
@@ -55,14 +49,6 @@ function baseReducer (state = initialState, action) {
         })
       }
     }
-    case 'RECEIVED_NEXT_PAGE': {
-      return Object.assign({}, state, {
-        transactions: [
-          ...state.transactions,
-          ...action.msg.transactions
-        ]
-      })
-    }
     default:
       return state
   }
@@ -90,30 +76,14 @@ const elements = {
       if (oldState.transactionCount === state.transactionCount) return
       $el.empty().append(numeral(state.transactionCount).format())
     }
-  },
-  '[data-selector="transactions-list"]': {
-    load ($el, store) {
-      return {
-        transactions: $el.children().map((index, el) => ({
-          transactionHash: el.dataset.transactionHash,
-          transactionHtml: el.outerHTML
-        })).toArray()
-      }
-    },
-    render ($el, state, oldState) {
-      if (oldState.transactions === state.transactions) return
-      const container = $el[0]
-      const newElements = _.map(state.transactions, ({ transactionHtml }) => $(transactionHtml)[0])
-      listMorph(container, newElements, { key: 'dataset.transactionHash' })
-    }
   }
 }
 
 const $transactionListPage = $('[data-page="transaction-list"]')
 if ($transactionListPage.length) {
-  const store = createStore(reducer)
+  const store = createAsyncLoadStore(reducer, initialState, 'dataset.transactionHash')
+
   connectElements({ store, elements })
-  connectInfiniteScroll(store)
 
   const transactionsChannel = socket.channel(`transactions:new_transaction`)
   transactionsChannel.join()

apps/block_scout_web/lib/block_scout_web/controllers/transaction_controller.ex

@@ -5,7 +5,6 @@ defmodule BlockScoutWeb.TransactionController do
 
   alias BlockScoutWeb.TransactionView
   alias Explorer.Chain
-  alias Explorer.Chain.Hash
   alias Phoenix.View
 
   def index(conn, %{"type" => "JSON"} = params) do
@@ -22,65 +21,42 @@ defmodule BlockScoutWeb.TransactionController do
         paging_options(params)
       )
 
-    {transactions, next_page} = get_transactions_and_next_page(full_options)
+    transactions_plus_one = Chain.recent_collated_transactions(full_options)
+    {transactions, next_page} = split_list_by_page(transactions_plus_one)
 
-    next_page_url =
+    next_page_path =
       case next_page_params(next_page, transactions, params) do
         nil ->
           nil
 
         next_page_params ->
-          transaction_path(
-            conn,
-            :index,
-            next_page_params
-          )
+          transaction_path(conn, :index, Map.delete(next_page_params, "type"))
       end
 
     json(
       conn,
       %{
-        transactions:
+        items:
           Enum.map(transactions, fn transaction ->
-            %{
-              transaction_hash: Hash.to_string(transaction.hash),
-              transaction_html:
             View.render_to_string(
               TransactionView,
               "_tile.html",
               transaction: transaction
             )
-            }
           end),
-        next_page_url: next_page_url
+        next_page_path: next_page_path
       }
     )
   end
 
-  def index(conn, params) do
-    full_options =
-      Keyword.merge(
-        [
-          necessity_by_association: %{
-            :block => :required,
-            [created_contract_address: :names] => :optional,
-            [from_address: :names] => :optional,
-            [to_address: :names] => :optional
-          }
-        ],
-        paging_options(%{})
-      )
-
-    {transactions, next_page} = get_transactions_and_next_page(full_options)
-
+  def index(conn, _params) do
     transaction_estimated_count = Chain.transaction_estimated_count()
 
     render(
       conn,
       "index.html",
-      next_page_params: next_page_params(next_page, transactions, params),
-      transaction_estimated_count: transaction_estimated_count,
-      transactions: transactions
+      current_path: current_path(conn),
+      transaction_estimated_count: transaction_estimated_count
     )
   end
 
@@ -102,9 +78,4 @@ defmodule BlockScoutWeb.TransactionController do
       redirect(conn, to: transaction_internal_transaction_path(conn, :index, id))
     end
   end
-
-  defp get_transactions_and_next_page(options) do
-    transactions_plus_one = Chain.recent_collated_transactions(options)
-    split_list_by_page(transactions_plus_one)
-  end
 end

apps/block_scout_web/lib/block_scout_web/templates/transaction/index.html.eex

@@ -1,6 +1,6 @@
 <section class="container" data-page="transaction-list">
   <div class="card">
-    <div class="card-body">
+    <div class="card-body" data-async-listing="<%= @current_path %>">
 
       <h1><%= gettext "Validated Transactions" %></h1>
       <p>
@@ -20,35 +20,38 @@
         </div>
       </div>
 
-      <span data-selector="transactions-list">
-        <%= for transaction <- @transactions do %>
-          <%= render BlockScoutWeb.TransactionView, "_tile.html", transaction: transaction %>
-        <% end %>
+      <button data-error-message class="alert alert-danger col-12 text-left" style="display: none;">
+        <span href="#" class="alert-link"><%= gettext("Something went wrong, click to reload.") %></span>
+      </button>
+
+      <div data-empty-response-message style="display: none;">
+        <div class="tile tile-muted text-center">
+          <span data-selector="empty-internal-transactions-list">
+            <%= gettext "There are no transactions." %>
           </span>
-      <div data-selector="loading-next-page" class="tile tile-muted text-center mt-3" style="display: none;">
+        </div>
+      </div>
+
+      <div data-loading-message class="tile tile-muted text-center mt-3">
         <span class="loading-spinner-small mr-2">
           <span class="loading-spinner-block-1"></span>
           <span class="loading-spinner-block-2"></span>
         </span>
         <%= gettext("Loading") %>...
       </div>
-      <div data-selector="paging-error-message" class="alert alert-danger text-center mt-3" style="display: none;">
-        <%= gettext("Error trying to fetch next page.") %>
-      </div>
 
-      <%= if @next_page_params do %>
-        <%= link(
-          gettext("Older"),
-          class: "button button-secondary button-sm float-right mt-3",
-          "data-selector": "next-page-button",
-          to: transaction_path(
-            @conn,
-            :index,
-            @next_page_params
-          )
-        ) %>
-      <% end %>
-    </div>
+      <div data-selector="transactions-list" data-items></div >
+
+      <a href="#" data-next-page-button class="button button-secondary button-small float-right mt-4" style="display: none;">
+        <%= gettext("Older") %>
+      </a>
 
+      <div class="button button-secondary button-small float-right mt-4" data-loading-button style="display: none;">
+        <span class="loading-spinner-small mr-2">
+          <span class="loading-spinner-block-1"></span>
+          <span class="loading-spinner-block-2"></span>
+        </span>
+        <%= gettext("Loading") %>...
+      </div>
   </div>
 </section>

apps/block_scout_web/test/block_scout_web/controllers/transaction_controller_test.exs

@@ -7,14 +7,18 @@ defmodule BlockScoutWeb.TransactionControllerTest do
 
   describe "GET index/2" do
     test "returns a collated transactions", %{conn: conn} do
-      transaction =
       :transaction
       |> insert()
       |> with_block()
 
-      conn = get(conn, "/txs")
+      conn = get(conn, transaction_path(conn, :index, %{"type" => "JSON"}))
+
+      transactions_html =
+        conn
+        |> json_response(200)
+        |> Map.get("items")
 
-      assert List.first(conn.assigns.transactions).hash == transaction.hash
+      assert length(transactions_html) == 1
     end
 
     test "returns a count of transactions", %{conn: conn} do
@@ -28,16 +32,22 @@ defmodule BlockScoutWeb.TransactionControllerTest do
     end
 
     test "excludes pending transactions", %{conn: conn} do
-      %Transaction{hash: hash} =
+      %Transaction{hash: transaction_hash} =
         :transaction
         |> insert()
         |> with_block()
 
-      insert(:transaction)
+      %Transaction{hash: pending_transaction_hash} = insert(:transaction)
 
-      conn = get(conn, "/txs")
+      conn = get(conn, transaction_path(conn, :index, %{"type" => "JSON"}))
+
+      transactions_html =
+        conn
+        |> json_response(200)
+        |> Map.get("items")
 
-      assert [%Transaction{hash: ^hash}] = conn.assigns.transactions
+      assert Enum.any?(transactions_html, &String.contains?(&1, to_string(transaction_hash)))
+      refute Enum.any?(transactions_html, &String.contains?(&1, to_string(pending_transaction_hash)))
     end
 
     test "returns next page of results based on last seen transaction", %{conn: conn} do
@@ -53,33 +63,34 @@ defmodule BlockScoutWeb.TransactionControllerTest do
         |> with_block()
 
       conn =
-        get(conn, "/txs", %{
+        get(
+          conn,
+          transaction_path(conn, :index, %{
             "type" => "JSON",
             "block_number" => Integer.to_string(block_number),
             "index" => Integer.to_string(index)
           })
+        )
 
-      {:ok, %{"transactions" => transactions}} = conn.resp_body |> Poison.decode()
+      transactions_html =
+        conn
+        |> json_response(200)
+        |> Map.get("items")
 
-      actual_hashes =
-        transactions
-        |> Enum.map(& &1["transaction_hash"])
-        |> Enum.reverse()
-
-      assert second_page_hashes == actual_hashes
+      assert length(second_page_hashes) == length(transactions_html)
     end
 
     test "next_page_params exist if not on last page", %{conn: conn} do
       address = insert(:address)
-      block = %Block{number: number} = insert(:block)
+      block = insert(:block)
 
       60
       |> insert_list(:transaction, from_address: address)
       |> with_block(block)
 
-      conn = get(conn, "/txs")
+      conn = get(conn, transaction_path(conn, :index, %{"type" => "JSON"}))
 
-      assert %{"block_number" => ^number, "index" => 10} = conn.assigns.next_page_params
+      assert conn |> json_response(200) |> Map.get("next_page_path")
     end
 
     test "next_page_params are empty if on last page", %{conn: conn} do
@@ -89,15 +100,15 @@ defmodule BlockScoutWeb.TransactionControllerTest do
       |> insert(from_address: address)
       |> with_block()
 
-      conn = get(conn, "/txs")
+      conn = get(conn, transaction_path(conn, :index, %{"type" => "JSON"}))
 
-      refute conn.assigns.next_page_params
+      refute conn |> json_response(200) |> Map.get("next_page_path")
     end
 
     test "works when there are no transactions", %{conn: conn} do
       conn = get(conn, "/txs")
 
-      assert conn.assigns.transactions == []
+      assert html_response(conn, 200)
     end
   end