Add graphs and retention metrics to admin dashboard (#16829)

app/javascript/mastodon/components/admin/Dimension.js

@@ -0,0 +1,92 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import api from 'mastodon/api';
+import { FormattedNumber } from 'react-intl';
+import { roundTo10 } from 'mastodon/utils/numbers';
+import Skeleton from 'mastodon/components/skeleton';
+
+export default class Dimension extends React.PureComponent {
+
+  static propTypes = {
+    dimension: PropTypes.string.isRequired,
+    start_at: PropTypes.string.isRequired,
+    end_at: PropTypes.string.isRequired,
+    limit: PropTypes.number.isRequired,
+    label: PropTypes.string.isRequired,
+  };
+
+  state = {
+    loading: true,
+    data: null,
+  };
+
+  componentDidMount () {
+    const { start_at, end_at, dimension, limit } = this.props;
+
+    api().post('/api/v1/admin/dimensions', { keys: [dimension], start_at, end_at, limit }).then(res => {
+      this.setState({
+        loading: false,
+        data: res.data,
+      });
+    }).catch(err => {
+      console.error(err);
+    });
+  }
+
+  render () {
+    const { label, limit } = this.props;
+    const { loading, data } = this.state;
+
+    let content;
+
+    if (loading) {
+      content = (
+        <table>
+          <tbody>
+            {Array.from(Array(limit)).map((_, i) => (
+              <tr className='dimension__item' key={i}>
+                <td className='dimension__item__key'>
+                  <Skeleton width={100} />
+                </td>
+
+                <td className='dimension__item__value'>
+                  <Skeleton width={60} />
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      );
+    } else {
+      const sum = data[0].data.reduce((sum, cur) => sum + (cur.value * 1), 0);
+
+      content = (
+        <table>
+          <tbody>
+            {data[0].data.map(item => (
+              <tr className='dimension__item' key={item.key}>
+                <td className='dimension__item__key'>
+                  <span className={`dimension__item__indicator dimension__item__indicator--${roundTo10(((item.value * 1) / sum) * 100)}`} />
+                  <span title={item.key}>{item.human_key}</span>
+                </td>
+
+                <td className='dimension__item__value'>
+                  {typeof item.human_value !== 'undefined' ? item.human_value : <FormattedNumber value={item.value} />}
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      );
+    }
+
+    return (
+      <div className='dimension'>
+        <h4>{label}</h4>
+
+        {content}
+      </div>
+    );
+  }
+
+}