From d048f06e606c9b9cb88ec75807830f564d37e6df Mon Sep 17 00:00:00 2001
From: Jaco Greeff <jacogr@gmail.com>
Date: Wed, 29 Jul 2020 19:21:21 +0200
Subject: [PATCH] Display schedule on democracy (#3287)

---
 .../page-democracy/src/Overview/Scheduled.tsx | 49 ++++++++++
 .../page-democracy/src/Overview/Scheduler.tsx | 89 +++++++++++++++++++
 .../page-democracy/src/Overview/index.tsx     |  4 +
 packages/page-democracy/src/Overview/types.ts | 19 ++++
 packages/react-components/src/Progress.tsx    | 21 ++++-
 5 files changed, 180 insertions(+), 2 deletions(-)
 create mode 100644 packages/page-democracy/src/Overview/Scheduled.tsx
 create mode 100644 packages/page-democracy/src/Overview/Scheduler.tsx
 create mode 100644 packages/page-democracy/src/Overview/types.ts

diff --git a/packages/page-democracy/src/Overview/Scheduled.tsx b/packages/page-democracy/src/Overview/Scheduled.tsx
new file mode 100644
index 0000000000..269d847584
--- /dev/null
+++ b/packages/page-democracy/src/Overview/Scheduled.tsx
@@ -0,0 +1,49 @@
+// Copyright 2017-2020 @polkadot/app-democracy authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BlockNumber } from '@polkadot/types/interfaces';
+import { ScheduledExt } from './types';
+
+import React from 'react';
+import { CallExpander } from '@polkadot/react-components';
+import { useApi, useCall } from '@polkadot/react-hooks';
+import { BlockToTime } from '@polkadot/react-query';
+import { formatNumber } from '@polkadot/util';
+
+interface Props {
+  className?: string;
+  value: ScheduledExt;
+}
+
+function Scheduled ({ className = '', value: { call, count, maybePeriodic, nextBlockNumber } }: Props): React.ReactElement<Props> {
+  const { api } = useApi();
+  const bestNumber = useCall<BlockNumber>(api.derive.chain.bestNumber, []);
+  const period = maybePeriodic.unwrapOr(null);
+
+  return (
+    <tr className={className}>
+      <td className='all'><CallExpander value={call} /></td>
+      <td className='number together'>
+        {bestNumber && (
+          <>
+            <BlockToTime blocks={nextBlockNumber.sub(bestNumber)} />
+            #{formatNumber(nextBlockNumber)}
+          </>
+        )}
+      </td>
+      <td className='number together'>
+        {period && (
+          formatNumber(period[0])
+        )}
+      </td>
+      <td className='number together'>
+        {period && (
+          formatNumber(count) + ' / ' + formatNumber(period[1])
+        )}
+      </td>
+    </tr>
+  );
+}
+
+export default React.memo(Scheduled);
diff --git a/packages/page-democracy/src/Overview/Scheduler.tsx b/packages/page-democracy/src/Overview/Scheduler.tsx
new file mode 100644
index 0000000000..2616a7e2c6
--- /dev/null
+++ b/packages/page-democracy/src/Overview/Scheduler.tsx
@@ -0,0 +1,89 @@
+// Copyright 2017-2020 @polkadot/app-democracy authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BlockNumber, Scheduled } from '@polkadot/types/interfaces';
+import { ScheduledExt } from './types';
+
+import React, { useMemo } from 'react';
+import { Table } from '@polkadot/react-components';
+import { useApi, useCall } from '@polkadot/react-hooks';
+import { Option } from '@polkadot/types';
+
+import { useTranslation } from '../translate';
+import ScheduledView from './Scheduled';
+
+interface Props {
+  className?: string;
+}
+
+function Schedule ({ className = '' }: Props): React.ReactElement<Props> {
+  const { t } = useTranslation();
+  const { api } = useApi();
+  const bestNumber = useCall<BlockNumber>(api.derive.chain.bestNumber, []);
+  const items = useCall<ScheduledExt[]>(api.query.scheduler.agenda.entries as any, [], {
+    transform: (entries: [{ args: [BlockNumber] }, Option<Scheduled>[]][]): ScheduledExt[] =>
+      entries
+        .filter(([, vecSchedOpt]) => vecSchedOpt.some((schedOpt) => schedOpt.isSome))
+        .reduce((items: ScheduledExt[], [key, vecSchedOpt]): ScheduledExt[] => {
+          const blockNumber = key.args[0];
+
+          return vecSchedOpt
+            .filter((schedOpt) => schedOpt.isSome)
+            .map((schedOpt) => schedOpt.unwrap())
+            .reduce((items: ScheduledExt[], { call, maybeId, maybePeriodic, priority }, index) => {
+              items.push({ blockNumber, call, count: 0, key: `${blockNumber.toString()}-${index}`, maybeId, maybePeriodic, nextBlockNumber: blockNumber, priority });
+
+              return items;
+            }, items);
+        }, [])
+  });
+
+  const header = useMemo(() => [
+    [t('scheduled'), 'start'],
+    [t('remaining')],
+    [t('period')],
+    [t('count')]
+  ], [t]);
+
+  let scheduled: ScheduledExt[] | undefined;
+
+  if (bestNumber && items) {
+    scheduled = items
+      .map((schedule): ScheduledExt => {
+        if (schedule.maybePeriodic.isSome) {
+          const [inc, max] = schedule.maybePeriodic.unwrap();
+          const nextBlockNumber = schedule.blockNumber.toBn();
+          let count = 0;
+
+          while (max.gtn(count) && nextBlockNumber.lt(bestNumber)) {
+            count++;
+            nextBlockNumber.iadd(inc);
+          }
+
+          schedule.count = count;
+          schedule.nextBlockNumber = nextBlockNumber;
+        }
+
+        return schedule;
+      })
+      .filter(({ nextBlockNumber }) => nextBlockNumber.gt(bestNumber));
+  }
+
+  return (
+    <Table
+      className={className}
+      empty={scheduled?.length === 0 && t<string>('No active schedules')}
+      header={header}
+    >
+      {scheduled?.map((scheduled): React.ReactNode => (
+        <ScheduledView
+          key={scheduled.key}
+          value={scheduled}
+        />
+      ))}
+    </Table>
+  );
+}
+
+export default React.memo(Schedule);
diff --git a/packages/page-democracy/src/Overview/index.tsx b/packages/page-democracy/src/Overview/index.tsx
index 75832093bf..166f859eaa 100644
--- a/packages/page-democracy/src/Overview/index.tsx
+++ b/packages/page-democracy/src/Overview/index.tsx
@@ -14,6 +14,7 @@ import DispatchQueue from './DispatchQueue';
 import Externals from './Externals';
 import Proposals from './Proposals';
 import Referendums from './Referendums';
+import Scheduler from './Scheduler';
 import Summary from './Summary';
 import PreImage from './PreImage';
 import Propose from './Propose';
@@ -54,6 +55,9 @@ function Overview ({ className }: Props): React.ReactElement<Props> {
       <Proposals />
       <DispatchQueue />
       <Externals />
+      {api.query.scheduler && (
+        <Scheduler />
+      )}
     </div>
   );
 }
diff --git a/packages/page-democracy/src/Overview/types.ts b/packages/page-democracy/src/Overview/types.ts
new file mode 100644
index 0000000000..23ad6481bd
--- /dev/null
+++ b/packages/page-democracy/src/Overview/types.ts
@@ -0,0 +1,19 @@
+// Copyright 2017-2020 @polkadot/app-democracy authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { BlockNumber, Call, SchedulePeriod, SchedulePriority } from '@polkadot/types/interfaces';
+
+import BN from 'bn.js';
+import { Bytes, Option } from '@polkadot/types';
+
+export interface ScheduledExt {
+  blockNumber: BlockNumber;
+  call: Call;
+  count: number;
+  key: string;
+  maybeId: Option<Bytes>;
+  maybePeriodic: Option<SchedulePeriod>;
+  priority: SchedulePriority;
+  nextBlockNumber: BN;
+}
diff --git a/packages/react-components/src/Progress.tsx b/packages/react-components/src/Progress.tsx
index 346927cb22..c9bb23b128 100644
--- a/packages/react-components/src/Progress.tsx
+++ b/packages/react-components/src/Progress.tsx
@@ -11,6 +11,7 @@ import { bnToBn } from '@polkadot/util';
 interface Props {
   className?: string;
   isDisabled?: boolean;
+  size?: 'normal' | 'small'
   total?: UInt | BN | number | null;
   value?: UInt | BN | number | null;
 }
@@ -33,7 +34,7 @@ function DivClip ({ angle, type }: RotateProps): React.ReactElement<RotateProps>
 
 const Clip = React.memo(DivClip);
 
-function Progress ({ className = '', isDisabled, total, value }: Props): React.ReactElement<Props> | null {
+function Progress ({ className = '', isDisabled, size = 'normal', total, value }: Props): React.ReactElement<Props> | null {
   const _total = bnToBn(total || 0);
   const angle = _total.gtn(0)
     ? (bnToBn(value || 0).muln(36000).div(_total).toNumber() / 100)
@@ -44,7 +45,7 @@ function Progress ({ className = '', isDisabled, total, value }: Props): React.R
   }
 
   return (
-    <div className={`ui--Progress${isDisabled ? ' isDisabled' : ''} ${className}`}>
+    <div className={`ui--Progress${isDisabled ? ' isDisabled' : ''} ${size}Size ${className}`}>
       <div className='background ui--highlight--bg' />
       <Clip
         angle={
@@ -141,4 +142,20 @@ export default React.memo(styled(Progress)`
       text-shadow: 0 0 2px #f5f4f3;
     }
   }
+
+  &.smallSize {
+    height: 2.25rem;
+    width: 2.25rem;
+
+    .inner {
+      bottom: 0.1875rem;
+      left: 0.1875rem;
+      right: 0.1875rem;
+      top: 0.1875rem;
+    }
+
+    div {
+      font-size: 0.625rem;
+    }
+  }
 `);