Merge pull request #156 from status-im/features/explorer-pagination

Add pagination to explorer

embark-ui/src/components/Blocks.js

@@ -2,11 +2,11 @@ import React from 'react';
 import {Link} from "react-router-dom";
 import {Row, Col, Card, CardHeader, CardBody} from 'reactstrap';
 import PropTypes from 'prop-types';
+import Pagination from './Pagination';
 
 import CardTitleIdenticon from './CardTitleIdenticon';
-import LoadMore from "./LoadMore";
 
-const Blocks = ({blocks, showLoadMore, loadMore}) => (
+const Blocks = ({blocks, changePage, currentPage, numberOfPages}) => (
   <Row>
     <Col>
       <Card>
@@ -37,7 +37,7 @@ const Blocks = ({blocks, showLoadMore, loadMore}) => (
               </Row>
             </div>
           ))}
-          {showLoadMore && <LoadMore loadMore={() => loadMore()}/>}
+          <Pagination changePage={changePage} currentPage={currentPage} numberOfPages={numberOfPages}/>
         </CardBody>
       </Card>
     </Col>
@@ -46,8 +46,9 @@ const Blocks = ({blocks, showLoadMore, loadMore}) => (
 
 Blocks.propTypes = {
   blocks: PropTypes.arrayOf(PropTypes.object),
-  showLoadMore: PropTypes.bool,
-  loadMore: PropTypes.func
+  changePage: PropTypes.func,
+  currentPage: PropTypes.number,
+  numberOfPages: PropTypes.number
 };
 
 export default Blocks;

embark-ui/src/components/Explorer.css

@@ -2,6 +2,10 @@
   border-top-width: 0 !important; /*Bootstrap uses important, so we need to override it*/ 
 }
 
+.explorer-overview .card-body {
+  overflow: hidden;
+}
+
 .explorer-row + .explorer-row {
   margin-top: 5px;
   padding-top: 20px;
@@ -12,3 +16,8 @@
   width: 90%;
   display: inline-block;
 }
+
+.explorer-row .text-truncate {
+  width: 90%;
+  display: inline-block;
+}

embark-ui/src/components/ExplorerDashboardLayout.js

@@ -11,21 +11,21 @@ import TransactionsContainer from '../containers/TransactionsContainer';
 import './Explorer.css';
 
 const ExplorerDashboardLayout = () => (
-  <React.Fragment>
+  <div className="explorer-overview">
     <Row className="mt-4">
       <Col>
         <AccountsContainer />
       </Col>
     </Row>
     <Row>
-      <Col md={6}>
+      <Col xl={6}>
         <BlocksContainer />
       </Col>
-      <Col md={6}>
+      <Col xl={6}>
         <TransactionsContainer />
       </Col>
     </Row>
-  </React.Fragment>
+  </div>
 );
 
 export default ExplorerDashboardLayout;

embark-ui/src/components/Layout.js

@@ -129,7 +129,7 @@ class Layout extends React.Component {
         </Nav>
         <AppHeaderDropdown className="list-unstyled d-xl-none" direction="down">
           <DropdownToggle nav>
-            <FontAwesome name='bars'/>
+            <FontAwesome name="bars"/>
           </DropdownToggle>
           <DropdownMenu>
             {HEADER_NAV_ITEMS.map((item) => (

embark-ui/src/components/LoadMore.js

@@ -1,17 +0,0 @@
-import React from 'react';
-import {Row, Col, Button} from 'reactstrap';
-import PropTypes from 'prop-types';
-
-const LoadMore = ({loadMore}) => (
-  <Row className="my-3">
-    <Col className="text-center">
-      <Button onClick={loadMore} icon="plus" outline color="primary">Load More</Button>
-    </Col>
-  </Row>
-);
-
-LoadMore.propTypes = {
-  loadMore: PropTypes.func
-};
-
-export default LoadMore;

embark-ui/src/components/Pagination.js

@@ -0,0 +1,56 @@
+import React from 'react';
+import {Pagination as RPagination, PaginationItem, PaginationLink} from 'reactstrap';
+import PropTypes from 'prop-types';
+
+const NB_PAGES_MAX = 8;
+
+const Pagination = ({currentPage, numberOfPages, changePage}) => {
+  let max = currentPage + NB_PAGES_MAX / 2;
+  if (max > numberOfPages) {
+    max = numberOfPages;
+  }
+  let i = max - NB_PAGES_MAX;
+  if (i < 1) {
+    i = 1;
+  }
+  if (max - i < NB_PAGES_MAX) {
+    max += NB_PAGES_MAX - max + 1;
+  }
+  const pageNumbers = [];
+  for (i; i <= max; i++) {
+    pageNumbers.push(i);
+  }
+
+  return (
+    <RPagination aria-label="Explorer navigation" className="mt-4 mb-0 float-right">
+      <PaginationItem disabled={currentPage <= 1}>
+        <PaginationLink previous href="#" onClick={(e) => {
+          e.preventDefault();
+          changePage(currentPage - 1);
+        }}/>
+      </PaginationItem>
+      {pageNumbers.map(number => (<PaginationItem active={currentPage === number} key={'page-' + number}>
+        <PaginationLink href="#" onClick={(e) => {
+          e.preventDefault();
+          changePage(number);
+        }}>
+          {number}
+        </PaginationLink>
+      </PaginationItem>))}
+      <PaginationItem disabled={currentPage >= numberOfPages}>
+        <PaginationLink next href="#" onClick={(e) => {
+          e.preventDefault();
+          changePage(currentPage + 1);
+        }}/>
+      </PaginationItem>
+    </RPagination>
+  );
+};
+
+Pagination.propTypes = {
+  numberOfPages: PropTypes.number,
+  currentPage: PropTypes.number,
+  changePage: PropTypes.func
+};
+
+export default Pagination;

embark-ui/src/components/Transactions.js

@@ -4,9 +4,9 @@ import {Row, Col, Card, CardHeader, CardBody} from 'reactstrap';
 import PropTypes from 'prop-types';
 
 import CardTitleIdenticon from './CardTitleIdenticon';
-import LoadMore from "./LoadMore";
+import Pagination from "./Pagination";
 
-const Transactions = ({transactions, showLoadMore, loadMore}) => (
+const Transactions = ({transactions, changePage, currentPage, numberOfPages}) => (
   <Row>
     <Col>
       <Card>
@@ -41,7 +41,7 @@ const Transactions = ({transactions, showLoadMore, loadMore}) => (
               </Row>
             </div>
           ))}
-          {showLoadMore && <LoadMore loadMore={() => loadMore()}/>}
+          <Pagination changePage={changePage} currentPage={currentPage} numberOfPages={numberOfPages}/>
         </CardBody>
       </Card>
     </Col>
@@ -50,8 +50,9 @@ const Transactions = ({transactions, showLoadMore, loadMore}) => (
 
 Transactions.propTypes = {
   transactions: PropTypes.arrayOf(PropTypes.object),
-  showLoadMore: PropTypes.bool,
-  loadMore: PropTypes.func
+  changePage: PropTypes.func,
+  currentPage: PropTypes.number,
+  numberOfPages: PropTypes.number
 };
 
 export default Transactions;

embark-ui/src/containers/BlocksContainer.js

@@ -7,7 +7,17 @@ import Blocks from '../components/Blocks';
 import DataWrapper from "../components/DataWrapper";
 import {getBlocks} from "../reducers/selectors";
 
+const MAX_BLOCKS = 10; // TODO use same constant as API
+
 class BlocksContainer extends Component {
+  constructor(props) {
+    super(props);
+
+    this.state = {currentPage: 0};
+    this.numberOfBlocks = 0;
+    this.currentBlocks = [];
+  }
+
   componentDidMount() {
     this.props.fetchBlocks();
     this.props.initBlockHeader();
@@ -17,23 +27,41 @@ class BlocksContainer extends Component {
     this.props.stopBlockHeader();
   }
 
-  loadMore() {
-    this.props.fetchBlocks(this.loadMoreFrom());
+  getNumberOfPages() {
+    if (!this.numberOfBlocks) {
+      let blocks = this.props.blocks;
+      if (blocks.length === 0) {
+        this.numberOfBlocks = 0;
+      } else {
+        this.numberOfBlocks = blocks[blocks.length - 1].number - 1;
+      }
+    }
+    return Math.ceil(this.numberOfBlocks / MAX_BLOCKS);
   }
 
-  loadMoreFrom() {
-    let blocks = this.props.blocks;
-    if (blocks.length === 0) {
-      return 0;
-    }
-    return blocks[blocks.length - 1].number - 1;
+  changePage(newPage) {
+    this.setState({currentPage: newPage});
+
+    this.props.fetchBlocks((newPage * MAX_BLOCKS) + MAX_BLOCKS);
+  }
+
+  getCurrentBlocks() {
+    const currentPage = this.state.currentPage || this.getNumberOfPages();
+    return this.props.blocks.filter(block => block.number <= (currentPage * MAX_BLOCKS) + MAX_BLOCKS &&
+      block.number > currentPage * MAX_BLOCKS);
   }
 
   render() {
+    const newBlocks = this.getCurrentBlocks();
+    if (newBlocks.length) {
+      this.currentBlocks = newBlocks;
+    }
     return (
       <React.Fragment>
-        <DataWrapper shouldRender={this.props.blocks.length > 0} {...this.props} render={({blocks}) => (
-          <Blocks blocks={blocks} showLoadMore={(this.loadMoreFrom() >= 0)} loadMore={() => this.loadMore()} />
+        <DataWrapper shouldRender={this.currentBlocks.length > 0} {...this.props} render={() => (
+          <Blocks blocks={this.currentBlocks} numberOfPages={this.getNumberOfPages()}
+                  changePage={(newPage) => this.changePage(newPage)}
+                  currentPage={this.state.currentPage || this.getNumberOfPages()} />
         )} />
       </React.Fragment>
     );

embark-ui/src/containers/TransactionsContainer.js

@@ -7,7 +7,17 @@ import Transactions from '../components/Transactions';
 import DataWrapper from "../components/DataWrapper";
 import {getTransactions} from "../reducers/selectors";
 
+const MAX_TXS = 10; // TODO use same constant as API
+
 class TransactionsContainer extends Component {
+  constructor(props) {
+    super(props);
+
+    this.state = {currentPage: 0};
+    this.numberOfTxs = 0;
+    this.currentTxs = [];
+  }
+
   componentDidMount() {
     this.props.fetchTransactions();
     this.props.initBlockHeader();
@@ -17,24 +27,41 @@ class TransactionsContainer extends Component {
     this.props.stopBlockHeader();
   }
 
-  loadMore() {
-    this.props.fetchTransactions(this.loadMoreFrom());
+  getNumberOfPages() {
+    if (!this.numberOfTxs) {
+      let transactions = this.props.transactions;
+      if (transactions.length === 0) {
+        this.numberOfTxs = 0;
+      } else {
+        this.numberOfTxs = transactions[transactions.length - 1].blockNumber - 1;
+      }
+    }
+    return Math.ceil(this.numberOfTxs / MAX_TXS);
   }
 
-  loadMoreFrom() {
-    let transactions = this.props.transactions;
-    if (transactions.length === 0) {
-      return 0;
-    }
-    return transactions[transactions.length - 1].blockNumber - 1;
+  changePage(newPage) {
+    this.setState({currentPage: newPage});
+
+    this.props.fetchTransactions((newPage * MAX_TXS) + MAX_TXS);
+  }
+
+  getCurrentTransactions() {
+    const currentPage = this.state.currentPage || this.getNumberOfPages();
+    return this.props.transactions.filter(tx => tx.blockNumber <= (currentPage * MAX_TXS) + MAX_TXS &&
+      tx.blockNumber > currentPage * MAX_TXS);
   }
 
   render() {
+    const newTxs = this.getCurrentTransactions();
+    if (newTxs.length) {
+      this.currentTxs = newTxs;
+    }
     return (
       <React.Fragment>
-        <DataWrapper shouldRender={this.props.transactions.length > 0} {...this.props} render={({transactions}) => (
-          <Transactions transactions={transactions}
-                        showLoadMore={(this.loadMoreFrom() >= 0)} loadMore={() => this.loadMore()} />
+        <DataWrapper shouldRender={this.currentTxs.length > 0} {...this.props} render={() => (
+          <Transactions transactions={this.currentTxs} numberOfPages={this.getNumberOfPages()}
+                        changePage={(newPage) => this.changePage(newPage)}
+                        currentPage={this.state.currentPage || this.getNumberOfPages()} />
         )} />
       </React.Fragment>
     );