feat: shreds slot labels

src/features/Overview/ShredsProgression/ShredsChart.tsx

@@ -5,9 +5,13 @@ import type uPlot from "uplot";
 import { chartAxisColor, gridLineColor, gridTicksColor } from "../../../colors";
 import type { AlignedData } from "uplot";
 import { xRangeMs } from "./const";
-import { shredsProgressionPlugin } from "./shredsProgressionPlugin";
 import { useMedia, useRafLoop } from "react-use";
-import { Box } from "@radix-ui/themes";
+import {
+  shredsProgressionPlugin,
+  type LabelPositions,
+} from "./shredsProgressionPlugin";
+import { Box, Flex } from "@radix-ui/themes";
+import ShredsSlotLabels from "./ShredsSlotLabels";
 
 const REDRAW_INTERVAL_MS = 40;
 
@@ -65,6 +69,7 @@ export default function ShredsChart({
 
   const uplotRef = useRef<uPlot>();
   const lastRedrawRef = useRef(0);
+  const labelPositionsRef = useRef<LabelPositions>();
 
   const handleCreate = useCallback((u: uPlot) => {
     uplotRef.current = u;
@@ -136,7 +141,7 @@ export default function ShredsChart({
           },
         },
       ],
-      plugins: [shredsProgressionPlugin(isOnStartupScreen)],
+      plugins: [shredsProgressionPlugin(isOnStartupScreen, labelPositionsRef)],
     };
   }, [isOnStartupScreen, xIncrs]);
 
@@ -152,21 +157,24 @@ export default function ShredsChart({
   });
 
   return (
-    <Box height="100%" mx={`-${chartXPadding}px`}>
-      <AutoSizer>
-        {({ height, width }) => {
-          options.width = width;
-          options.height = height;
-          return (
-            <UplotReact
-              id={chartId}
-              options={options}
-              data={chartData}
-              onCreate={handleCreate}
-            />
-          );
-        }}
-      </AutoSizer>
-    </Box>
+    <Flex direction="column" gap="2px" height="100%">
+      {!isOnStartupScreen && <ShredsSlotLabels />}
+      <Box flexGrow="1" mx={`-${chartXPadding}px`}>
+        <AutoSizer>
+          {({ height, width }) => {
+            options.width = width;
+            options.height = height;
+            return (
+              <UplotReact
+                id={chartId}
+                options={options}
+                data={chartData}
+                onCreate={handleCreate}
+              />
+            );
+          }}
+        </AutoSizer>
+      </Box>
+    </Flex>
   );
 }

src/features/Overview/ShredsProgression/ShredsSlotLabels.tsx

@@ -0,0 +1,120 @@
+import { useAtomValue } from "jotai";
+import { Flex, Text } from "@radix-ui/themes";
+import { getSlotGroupLabelId, getSlotLabelId } from "./utils";
+import styles from "./shreds.module.css";
+import { useMemo } from "react";
+import { slotsPerLeader } from "../../../consts";
+import { shredsAtoms } from "./atoms";
+import { useSlotInfo } from "../../../hooks/useSlotInfo";
+import clsx from "clsx";
+import PeerIcon from "../../../components/PeerIcon";
+import { skippedClusterSlotsAtom } from "../../../atoms";
+import { isStartupProgressVisibleAtom } from "../../StartupProgress/atoms";
+
+const height = 30;
+
+/**
+ * Labels for shreds slots.
+ * Don't render during startup, because there will be multiple overlapping slots
+ * during the catching up phase.
+ */
+export default function ShredsSlotLabels() {
+  const isStartup = useAtomValue(isStartupProgressVisibleAtom);
+  const groupLeaderSlots = useAtomValue(shredsAtoms.groupLeaderSlots);
+
+  if (isStartup) return;
+
+  return (
+    <Flex
+      overflow="hidden"
+      position="relative"
+      // extra space for borders
+      height={`${height + 2}px`}
+      style={{ opacity: 0.8 }}
+    >
+      {groupLeaderSlots.map((slot) => (
+        <SlotGroupLabel key={slot} firstSlot={slot} />
+      ))}
+    </Flex>
+  );
+}
+
+interface SlotGroupLabelProps {
+  firstSlot: number;
+}
+function SlotGroupLabel({ firstSlot }: SlotGroupLabelProps) {
+  const { peer, name, isLeader } = useSlotInfo(firstSlot);
+  const slots = useMemo(() => {
+    return Array.from({ length: slotsPerLeader }, (_, i) => firstSlot + i);
+  }, [firstSlot]);
+
+  const skippedClusterSlots = useAtomValue(skippedClusterSlotsAtom);
+  const skippedSlots = useMemo(() => {
+    const skipped = new Set<number>();
+    for (const slot of slots) {
+      if (skippedClusterSlots.has(slot)) {
+        skipped.add(slot);
+      }
+    }
+    return skipped;
+  }, [slots, skippedClusterSlots]);
+
+  return (
+    <Flex
+      height={`${height}px`}
+      direction="column"
+      gap="2px"
+      position="absolute"
+      align="center"
+      overflow="hidden"
+      id={getSlotGroupLabelId(firstSlot)}
+      className={clsx(styles.slotGroupLabel, {
+        [styles.you]: isLeader,
+      })}
+    >
+      <Flex
+        align="center"
+        flexGrow="1"
+        px="2px"
+        className={clsx(styles.slotGroupTopContainer, {
+          [styles.skipped]: skippedSlots.size > 0,
+        })}
+      >
+        <Flex
+          justify="center"
+          align="center"
+          width="100%"
+          gap="4px"
+          wrap="nowrap"
+          className={styles.slotGroupNameContainer}
+        >
+          <PeerIcon
+            url={peer?.info?.icon_url}
+            size={17}
+            isYou={isLeader}
+            hideTooltip
+          />
+          <Text className={styles.name}>{name}</Text>
+        </Flex>
+      </Flex>
+
+      <Flex
+        width="100%"
+        height="3px"
+        position="relative"
+        overflow="hidden"
+        className={styles.slotBarsContainer}
+      >
+        {slots.map((slot) => (
+          <div
+            key={slot}
+            className={clsx(styles.slotBar, {
+              [styles.skipped]: skippedSlots.has(slot),
+            })}
+            id={getSlotLabelId(slot)}
+          />
+        ))}
+      </Flex>
+    </Flex>
+  );
+}

src/features/Overview/ShredsProgression/__tests__/atoms.test.tsx

@@ -120,7 +120,7 @@ describe("live shreds atoms with reference ts and ts deltas", () => {
     });
   });
 
-  it("for non-startup: deletes slot numbers before max completed slot number that was completed after chart min X", () => {
+  it("for non-startup: deletes slot numbers before max completed slot number that was completed before chart min X", () => {
     vi.useFakeTimers({
       toFake: ["Date"],
     });
@@ -161,13 +161,13 @@ describe("live shreds atoms with reference ts and ts deltas", () => {
       {
         slot: 2,
         // this will be deleted even if it has an event in chart range,
-        // because a slot number larger than it is marked as completed and being deleted
+        // because a slot number larger than it is marked as completed and before chart min x
         ts: chartRangeNs + 1_000_000,
         e: ShredEvent.shred_repair_request,
       },
       {
         // max slot number that is complete before chart min X
-        // delete this and all slot numbers before it
+        // keep this and delete all slot numbers before it
         slot: 3,
         ts: chartRangeNs - 1_000_000,
         e: ShredEvent.slot_complete,
@@ -252,6 +252,15 @@ describe("live shreds atoms with reference ts and ts deltas", () => {
     expect(result.current.slotsShreds).toEqual({
       referenceTs: 0,
       slots: new Map([
+        [
+          3,
+          {
+            shreds: [],
+            minEventTsDelta: -1,
+            maxEventTsDelta: -1,
+            completionTsDelta: -1,
+          },
+        ],
         [
           4,
           {
@@ -272,7 +281,7 @@ describe("live shreds atoms with reference ts and ts deltas", () => {
       ]),
     });
     expect(result.current.range).toEqual({
-      min: 4,
+      min: 3,
       max: 6,
     });
 

src/features/Overview/ShredsProgression/atoms.ts

@@ -2,7 +2,8 @@ import { atom } from "jotai";
 import type { LiveShreds } from "../../../api/types";
 import { maxShredEvent, ShredEvent } from "../../../api/entities";
 import { delayMs, xRangeMs } from "./const";
-import { nsPerMs } from "../../../consts";
+import { nsPerMs, slotsPerLeader } from "../../../consts";
+import { getSlotGroupLeader } from "../../../utils";
 
 type ShredEventTsDeltaMs = number | undefined;
 /**
@@ -42,6 +43,18 @@ export function createLiveShredsAtoms() {
      */
     minCompletedSlot: atom((get) => get(_minCompletedSlotAtom)),
     range: atom((get) => get(_slotRangeAtom)),
+    groupLeaderSlots: atom((get) => {
+      const range = get(_slotRangeAtom);
+      if (!range) return [];
+
+      const slots = [getSlotGroupLeader(range.min)];
+      while (slots[slots.length - 1] + slotsPerLeader - 1 < range.max) {
+        slots.push(
+          getSlotGroupLeader(slots[slots.length - 1] + slotsPerLeader),
+        );
+      }
+      return slots;
+    }),
     slotsShreds: atom((get) => get(_liveShredsAtom)),
     addShredEvents: atom(
       null,
@@ -187,8 +200,10 @@ export function createLiveShredsAtoms() {
                 slot.completionTsDelta != null &&
                 isBeforeChartX(slot.completionTsDelta, now, prev.referenceTs)
               ) {
-                // once we find a slot that is complete and far enough in the past, delete all slot numbers less it
+                // once we find a slot that is complete and far enough in the past,
+                // delete all slot numbers less it but keep this one for label spacing reference
                 shouldDeleteSlot = true;
+                continue;
               }
 
               if (shouldDeleteSlot) {
@@ -203,8 +218,10 @@ export function createLiveShredsAtoms() {
             if (!prevRange || !prev.slots.size) {
               return;
             }
-            prevRange.min = Math.min(...remainingSlotNumbers);
-            return prevRange;
+            return {
+              min: Math.min(...remainingSlotNumbers),
+              max: prevRange.max,
+            };
           });
 
           return prev;

src/features/Overview/ShredsProgression/shreds.module.css

@@ -0,0 +1,68 @@
+.slot-group-label {
+  --group-x: -100000px;
+  --group-name-opacity: 0;
+
+  background-color: #080b13;
+  border-radius: 2px;
+  border: 1px solid #3c4652;
+  will-change: transform;
+  transform: translate(var(--group-x));
+
+  &.you {
+    border: 1px solid #2a7edf;
+  }
+
+  .slot-group-top-container {
+    width: 100%;
+    background-color: #15181e;
+
+    &.skipped {
+      background-color: var(--red-2);
+    }
+
+    .slot-group-name-container {
+      opacity: var(--group-name-opacity);
+      transition: opacity 0.8s;
+      will-change: opacity;
+
+      .name {
+        font-size: 14px;
+        line-height: normal;
+        color: #ccc;
+        white-space: nowrap;
+        overflow: hidden;
+        text-overflow: ellipsis;
+      }
+    }
+  }
+
+  .slot-bars-container {
+    flex-shrink: 0;
+    .slot-bar {
+      --slot-x: 0;
+
+      position: absolute;
+      will-change: transform;
+      transform: translate(var(--slot-x));
+
+      height: 100%;
+      border-radius: 3px;
+      &:nth-child(1) {
+        background-color: var(--blue-7);
+      }
+      &:nth-child(2) {
+        background-color: var(--blue-6);
+      }
+      &:nth-child(3) {
+        background-color: var(--blue-5);
+      }
+      &:nth-child(4) {
+        background-color: var(--blue-4);
+      }
+
+      &.skipped {
+        background-color: var(--red-7);
+      }
+    }
+  }
+}