From e5211ac91d08165ee13b3e48c01e03224a08078f Mon Sep 17 00:00:00 2001
From: Ezerous <ezerous@gmail.com>
Date: Sat, 27 Feb 2021 19:26:27 +0200
Subject: [PATCH] feat: add pagination to Profile PostList

---
 .../src/components/PostList/index.jsx         | 15 ++--
 .../views/Profile/ProfilePostList/index.jsx   | 89 +++++++++++++++++++
 .../concordia-app/src/views/Profile/index.jsx | 14 ++-
 3 files changed, 102 insertions(+), 16 deletions(-)
 create mode 100644 packages/concordia-app/src/views/Profile/ProfilePostList/index.jsx

diff --git a/packages/concordia-app/src/components/PostList/index.jsx b/packages/concordia-app/src/components/PostList/index.jsx
index 064d5a0..9b118c3 100644
--- a/packages/concordia-app/src/components/PostList/index.jsx
+++ b/packages/concordia-app/src/components/PostList/index.jsx
@@ -2,24 +2,24 @@ import React, {
   useEffect, useMemo, useState,
 } from 'react';
 import PropTypes from 'prop-types';
-import { useSelector } from 'react-redux';
 import {
   Dimmer, Feed, Loader,
 } from 'semantic-ui-react';
 import { FORUM_CONTRACT } from 'concordia-shared/src/constants/contracts/ContractNames';
-import PostListRow from './PostListRow';
 import { drizzle } from '../../redux/store';
+import PostListRow from './PostListRow';
+import PaginationComponent from '../PaginationComponent';
 
 const { contracts: { [FORUM_CONTRACT]: { methods: { getPost: { cacheCall: getPostChainData } } } } } = drizzle;
 
 const PostList = (props) => {
-  const { postIds, loading, focusOnPost } = props;
+  const {
+    postIds, numberOfItems, onPageChange, loading, focusOnPost,
+  } = props;
   const [getPostCallHashes, setGetPostCallHashes] = useState([]);
-  const drizzleInitialized = useSelector((state) => state.drizzleStatus.initialized);
-  const drizzleInitializationFailed = useSelector((state) => state.drizzleStatus.failed);
 
   useEffect(() => {
-    if (drizzleInitialized && !drizzleInitializationFailed && !loading) {
+    if (!loading) {
       setGetPostCallHashes(
         postIds.map((postId) => ({
           id: postId,
@@ -27,7 +27,7 @@ const PostList = (props) => {
         })),
       );
     }
-  }, [drizzleInitializationFailed, drizzleInitialized, loading, postIds]);
+  }, [loading, postIds]);
 
   const posts = useMemo(() => {
     if (loading) {
@@ -54,6 +54,7 @@ const PostList = (props) => {
       <Dimmer.Dimmable as={Feed} blurring dimmed={loading} id="post-list" size="large">
           <Loader active={loading} />
           {posts}
+          <PaginationComponent onPageChange={onPageChange} numberOfItems={numberOfItems} />
       </Dimmer.Dimmable>
   );
 };
diff --git a/packages/concordia-app/src/views/Profile/ProfilePostList/index.jsx b/packages/concordia-app/src/views/Profile/ProfilePostList/index.jsx
new file mode 100644
index 0000000..51dbf37
--- /dev/null
+++ b/packages/concordia-app/src/views/Profile/ProfilePostList/index.jsx
@@ -0,0 +1,89 @@
+import React, {
+  useEffect, useMemo, useState,
+} from 'react';
+import { useSelector } from 'react-redux';
+import { useTranslation } from 'react-i18next';
+import { FORUM_CONTRACT } from 'concordia-shared/src/constants/contracts/ContractNames';
+import { Header } from 'semantic-ui-react';
+import { drizzle } from '../../../redux/store';
+import { ITEMS_PER_PAGE } from '../../../components/PaginationComponent';
+import PostList from '../../../components/PostList';
+
+const {
+  contracts: {
+    [FORUM_CONTRACT]: {
+      methods: {
+        getUserPostCount: { cacheCall: getUserPostCountChainData },
+        getUserPosts: { cacheCall: getUserPostsChainData },
+      },
+    },
+  },
+} = drizzle;
+
+const ProfilePostList = (props) => {
+  const { username, profileAddress } = props;
+  const [pageNumber, setPageNumber] = useState(1);
+
+  const [userPostCount, setUserPostCount] = useState(null);
+  const [postIds, setPostIds] = useState([]);
+
+  const [getUserPostCountCallHash, setGetUserPostCountCallHash] = useState(null);
+  const [getUserPostsCallHash, setGetUserPostsCallHash] = useState(null);
+
+  const getUserPostCountResult = useSelector((state) => state.contracts[FORUM_CONTRACT].getUserPostCount[getUserPostCountCallHash]);
+  const getUserPostsResult = useSelector((state) => state.contracts[FORUM_CONTRACT].getUserPosts[getUserPostsCallHash]);
+
+  const { t } = useTranslation();
+
+  useEffect(() => {
+    if (getUserPostCountCallHash === null) {
+      setGetUserPostCountCallHash(getUserPostCountChainData(profileAddress));
+    }
+  }, [getUserPostCountCallHash, profileAddress]);
+
+  useEffect(() => {
+    if (userPostCount !== null && userPostCount !== 0) {
+      const startIndex = Math.max(userPostCount - ITEMS_PER_PAGE * pageNumber, 0);
+      const endIndex = userPostCount - ITEMS_PER_PAGE * (pageNumber - 1) - 1;
+      setGetUserPostsCallHash(getUserPostsChainData(profileAddress, startIndex, endIndex));
+    }
+  }, [pageNumber, profileAddress, userPostCount]);
+
+  useEffect(() => {
+    if (getUserPostCountResult) {
+      setUserPostCount(parseInt(getUserPostCountResult.value, 10));
+    }
+  }, [getUserPostCountResult, userPostCount]);
+
+  useEffect(() => {
+    if (getUserPostsResult) {
+      setPostIds(getUserPostsResult.value.slice().reverse().map(Number));
+    }
+  }, [getUserPostsResult, userPostCount]);
+
+  const handlePageChange = (event, data) => {
+    setPageNumber(data.activePage);
+  };
+
+  return useMemo(() => {
+    if (postIds.length && postIds.length !== 0) {
+      return (
+          <PostList
+            postIds={postIds}
+            numberOfItems={userPostCount}
+            onPageChange={handlePageChange}
+          />
+      );
+    }
+    if (userPostCount === 0) {
+      return (
+          <Header textAlign="center" as="h2">
+              {t('profile.user.has.no.posts.header.message', { user: username })}
+          </Header>
+      );
+    }
+    return null;
+  }, [t, postIds, userPostCount, username]);
+};
+
+export default ProfilePostList;
diff --git a/packages/concordia-app/src/views/Profile/index.jsx b/packages/concordia-app/src/views/Profile/index.jsx
index 65090ad..6a3165c 100644
--- a/packages/concordia-app/src/views/Profile/index.jsx
+++ b/packages/concordia-app/src/views/Profile/index.jsx
@@ -1,7 +1,7 @@
 import React, {
   memo, useEffect, useMemo, useState,
 } from 'react';
-import { Container, Header, Tab } from 'semantic-ui-react';
+import { Container, Tab } from 'semantic-ui-react';
 import { useSelector } from 'react-redux';
 import { useHistory, useRouteMatch } from 'react-router';
 import { useTranslation } from 'react-i18next';
@@ -9,7 +9,7 @@ import { FORUM_CONTRACT } from 'concordia-shared/src/constants/contracts/Contrac
 import { drizzle } from '../../redux/store';
 import CustomLoadingTabPane from '../../components/CustomLoadingTabPane';
 import ProfileTopicList from './ProfileTopicList';
-import PostList from '../../components/PostList';
+import ProfilePostList from './ProfilePostList';
 import GeneralTab from './GeneralTab';
 import { GENERAL_TAB, POSTS_TAB, TOPICS_TAB } from '../../constants/ProfileTabs';
 import './styles.css';
@@ -80,13 +80,9 @@ const Profile = () => {
       <ProfileTopicList username={username} profileAddress={profileAddress} />
   ), [profileAddress, username]);
 
-  const postsTab = useMemo(() => (userPostIds.length > 0
-    ? (<PostList postIds={userPostIds} />)
-    : (
-        <Header textAlign="center" as="h2">
-            {t('profile.user.has.no.posts.header.message', { user: username })}
-        </Header>
-    )), [t, userPostIds, username]);
+  const postsTab = useMemo(() => (
+      <ProfilePostList username={username} profileAddress={profileAddress} />
+  ), [profileAddress, username]);
 
   const panes = useMemo(() => {
     const generalTabPane = (<CustomLoadingTabPane loading={loading}>{generalTab}</CustomLoadingTabPane>);