02_lesson: Add timestamp for each post

02_lesson_starter/package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@reduxjs/toolkit": "^1.8.0",
+        "date-fns": "^2.29.3",
         "prettier": "^2.8.4",
         "react": "^17.0.2",
         "react-dom": "^17.0.2",
@@ -5656,6 +5657,18 @@
         "node": ">=10"
       }
     },
+    "node_modules/date-fns": {
+      "version": "2.29.3",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.29.3.tgz",
+      "integrity": "sha512-dDCnyH2WnnKusqvZZ6+jA1O51Ibt8ZMRNkDZdyAyK4YfbDwa/cEmuztzG5pk6hqlp9aSBPYcjOlktquahGwGeA==",
+      "engines": {
+        "node": ">=0.11"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/date-fns"
+      }
+    },
     "node_modules/debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
@@ -19905,6 +19918,11 @@
         "whatwg-url": "^8.0.0"
       }
     },
+    "date-fns": {
+      "version": "2.29.3",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.29.3.tgz",
+      "integrity": "sha512-dDCnyH2WnnKusqvZZ6+jA1O51Ibt8ZMRNkDZdyAyK4YfbDwa/cEmuztzG5pk6hqlp9aSBPYcjOlktquahGwGeA=="
+    },
     "debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",

02_lesson_starter/package.json

@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "@reduxjs/toolkit": "^1.8.0",
+    "date-fns": "^2.29.3",
     "prettier": "^2.8.4",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",

02_lesson_starter/src/features/posts/PostsList.js

@@ -1,6 +1,7 @@
 import { useSelector } from "react-redux";
 import { selectAllPosts } from "./postsSlice";
 import PostAuthor from "./PostAuthor";
+import TimeAgo from "./TimeAgo";
 
 const PostsList = () => {
   const posts = useSelector(selectAllPosts);
@@ -11,6 +12,7 @@ const PostsList = () => {
       <p>{post.content.substring(0, 100)}</p>
       <p className="postCredit">
         <PostAuthor userId={post.userId} />
+        <TimeAgo timestamp={post.date} />
       </p>
     </article>
   ));

02_lesson_starter/src/features/posts/TimeAgo.js

@@ -0,0 +1,18 @@
+import { parseISO, formatDistanceToNow } from "date-fns";
+
+const TimeAgo = ({ timestamp }) => {
+  let timeAgo = "";
+  if (timestamp) {
+    const date = parseISO(timestamp);
+    const timePeriod = formatDistanceToNow(date);
+    timeAgo = `${timePeriod} ago`;
+  }
+
+  return (
+    <span title={timestamp}>
+      &nbsp; <i>{timeAgo}</i>
+    </span>
+  );
+};
+
+export default TimeAgo;

02_lesson_starter/src/features/posts/postsSlice.js

@@ -1,15 +1,18 @@
 import { createSlice, nanoid } from "@reduxjs/toolkit";
+import { sub } from "date-fns";
 
 const initialState = [
   {
     id: "1",
     title: "Learning Redux Toolkit",
     content: "I've heard good things.",
+    date: sub(new Date(), { minutes: 10 }).toISOString(),
   },
   {
     id: "2",
     title: "Slice...",
     content: "The more I say slice, the more I want pizza.",
+    date: sub(new Date(), { minutes: 5 }).toISOString(),
   },
 ];
 
@@ -29,6 +32,7 @@ const postsSlice = createSlice({
             title,
             content,
             userId,
+            date: new Date().toISOString(),
           },
         };
       },