transcript gutter

www/app/(app)/transcripts/[transcriptId]/_components/TopicList.tsx

@@ -1,12 +1,12 @@
 import React, { useState, useEffect } from "react";
 import ScrollToBottom from "../../scrollToBottom";
 import { Topic } from "../../webSocketTypes";
-import useParticipants from "../../useParticipants";
-import { Box, Flex, Text, Accordion } from "@chakra-ui/react";
-import { TopicItem } from "./TopicItem";
+import { Box, Flex, Text } from "@chakra-ui/react";
+import { formatTime } from "../../../../lib/time";
+import { getTopicColor } from "../../../../lib/topicColors";
 import { TranscriptStatus } from "../../../../lib/transcript";
-
 import { featureEnabled } from "../../../../lib/features";
+import { TOPICS_SCROLL_DIV_ID } from "./constants";
 
 type TopicListProps = {
   topics: Topic[];
@@ -18,6 +18,7 @@ type TopicListProps = {
   transcriptId: string;
   status: TranscriptStatus | null;
   currentTranscriptText: any;
+  onTopicClick?: (topicId: string) => void;
 };
 
 export function TopicList({
@@ -27,30 +28,13 @@ export function TopicList({
   transcriptId,
   status,
   currentTranscriptText,
+  onTopicClick,
 }: TopicListProps) {
   const [activeTopic, setActiveTopic] = useActiveTopic;
+  const [hoveredTopicId, setHoveredTopicId] = useState<string | null>(null);
   const [autoscrollEnabled, setAutoscrollEnabled] = useState<boolean>(true);
-  const participants = useParticipants(transcriptId);
 
-  const scrollToTopic = () => {
-    const topicDiv = document.getElementById(`topic-${activeTopic?.id}`);
-
-    setTimeout(() => {
-      topicDiv?.scrollIntoView({
-        behavior: "smooth",
-        block: "start",
-        inline: "nearest",
-      });
-    }, 200);
-  };
-
-  useEffect(() => {
-    if (activeTopic && autoscroll) scrollToTopic();
-  }, [activeTopic, autoscroll]);
-
-  // scroll top is not rounded, heights are, so exact match won't work.
-  // https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight#determine_if_an_element_has_been_totally_scrolled
-  const toggleScroll = (element) => {
+  const toggleScroll = (element: HTMLElement) => {
     const bottom =
       Math.abs(
         element.scrollHeight - element.clientHeight - element.scrollTop,
@@ -61,14 +45,19 @@ export function TopicList({
       setAutoscrollEnabled(true);
     }
   };
-  const handleScroll = (e) => {
-    toggleScroll(e.target);
+
+  const handleScroll = (e: React.UIEvent<HTMLDivElement>) => {
+    toggleScroll(e.target as HTMLElement);
+  };
+
+  const scrollToBottom = () => {
+    const topicsDiv = document.getElementById(TOPICS_SCROLL_DIV_ID);
+    if (topicsDiv) topicsDiv.scrollTop = topicsDiv.scrollHeight;
   };
 
   useEffect(() => {
     if (autoscroll) {
-      const topicsDiv = document.getElementById("scroll-div");
-
+      const topicsDiv = document.getElementById(TOPICS_SCROLL_DIV_ID);
       topicsDiv && toggleScroll(topicsDiv);
     }
   }, [activeTopic, autoscroll]);
@@ -77,37 +66,41 @@ export function TopicList({
     if (autoscroll && autoscrollEnabled) scrollToBottom();
   }, [topics.length, currentTranscriptText]);
 
-  const scrollToBottom = () => {
-    const topicsDiv = document.getElementById("scroll-div");
-
-    if (topicsDiv) topicsDiv.scrollTop = topicsDiv.scrollHeight;
-  };
-
-  const getSpeakerName = (speakerNumber: number) => {
-    if (!participants.response) return;
-    return (
-      participants.response.find(
-        (participant) => participant.speaker == speakerNumber,
-      )?.name || `Speaker ${speakerNumber}`
-    );
-  };
-
-  const requireLogin = featureEnabled("requireLogin");
-
   useEffect(() => {
     if (autoscroll) {
       setActiveTopic(topics[topics.length - 1]);
     }
   }, [topics, autoscroll]);
 
+  const handleTopicClick = (topic: Topic) => {
+    setActiveTopic(topic);
+    if (onTopicClick) {
+      onTopicClick(topic.id);
+    }
+  };
+
+  const handleTopicMouseEnter = (topic: Topic) => {
+    setHoveredTopicId(topic.id);
+    // If already active, toggle off when mousing over
+    if (activeTopic?.id === topic.id) {
+      setActiveTopic(null);
+    } else {
+      setActiveTopic(topic);
+    }
+  };
+
+  const handleTopicMouseLeave = () => {
+    setHoveredTopicId(null);
+  };
+
+  const requireLogin = featureEnabled("requireLogin");
+
   return (
     <Flex
-      position={"relative"}
-      w={"100%"}
-      h={"95%"}
-      flexDirection={"column"}
-      justify={"center"}
-      align={"center"}
+      position="relative"
+      w="full"
+      h="200px"
+      flexDirection="column"
       flexShrink={0}
     >
       {autoscroll && (
@@ -118,45 +111,71 @@ export function TopicList({
       )}
 
       <Box
-        id="scroll-div"
-        overflowY={"auto"}
-        h={"100%"}
+        id={TOPICS_SCROLL_DIV_ID}
+        overflowY="auto"
+        h="full"
         onScroll={handleScroll}
         width="full"
       >
         {topics.length > 0 && (
-          <Accordion.Root
-            multiple={false}
-            collapsible={true}
-            value={activeTopic ? [activeTopic.id] : []}
-            onValueChange={(details) => {
-              const selectedTopicId = details.value[0];
-              const selectedTopic = selectedTopicId
-                ? topics.find((t) => t.id === selectedTopicId)
-                : null;
-              setActiveTopic(selectedTopic || null);
-            }}
-          >
-            {topics.map((topic) => (
-              <TopicItem
-                key={topic.id}
-                topic={topic}
-                isActive={activeTopic?.id === topic.id}
-                getSpeakerName={getSpeakerName}
-              />
-            ))}
-          </Accordion.Root>
+          <Flex direction="column" gap={1} p={2}>
+            {topics.map((topic, index) => {
+              const color = getTopicColor(index);
+              const isActive = activeTopic?.id === topic.id;
+              const isHovered = hoveredTopicId === topic.id;
+
+              return (
+                <Flex
+                  key={topic.id}
+                  id={`topic-${topic.id}`}
+                  gap={2}
+                  align="center"
+                  py={1}
+                  px={2}
+                  cursor="pointer"
+                  bg={isActive || isHovered ? "gray.100" : "transparent"}
+                  _hover={{ bg: "gray.50" }}
+                  onClick={() => handleTopicClick(topic)}
+                  onMouseEnter={() => handleTopicMouseEnter(topic)}
+                  onMouseLeave={handleTopicMouseLeave}
+                >
+                  {/* Color indicator */}
+                  <Box
+                    w="12px"
+                    h="12px"
+                    borderRadius="full"
+                    bg={color}
+                    flexShrink={0}
+                  />
+
+                  {/* Topic title */}
+                  <Text
+                    flex={1}
+                    fontSize="sm"
+                    fontWeight={isActive ? "semibold" : "normal"}
+                  >
+                    {topic.title}
+                  </Text>
+
+                  {/* Timestamp */}
+                  <Text as="span" color="gray.500" fontSize="xs" flexShrink={0}>
+                    {formatTime(topic.timestamp)}
+                  </Text>
+                </Flex>
+              );
+            })}
+          </Flex>
         )}
 
         {status == "recording" && (
-          <Box textAlign={"center"}>
+          <Box textAlign="center">
             <Text>{currentTranscriptText}</Text>
           </Box>
         )}
         {(status == "recording" || status == "idle") &&
           currentTranscriptText.length == 0 &&
           topics.length == 0 && (
-            <Box textAlign={"center"} color="gray">
+            <Box textAlign="center" color="gray">
               <Text>
                 Full discussion transcript will appear here after you start
                 recording.
@@ -167,7 +186,7 @@ export function TopicList({
             </Box>
           )}
         {status == "processing" && (
-          <Box textAlign={"center"} color="gray">
+          <Box textAlign="center" color="gray">
             <Text>We are processing the recording, please wait.</Text>
             {!requireLogin && (
               <span>
@@ -177,12 +196,12 @@ export function TopicList({
           </Box>
         )}
         {status == "ended" && topics.length == 0 && (
-          <Box textAlign={"center"} color="gray">
+          <Box textAlign="center" color="gray">
             <Text>Recording has ended without topics being found.</Text>
           </Box>
         )}
         {status == "error" && (
-          <Box textAlign={"center"} color="gray">
+          <Box textAlign="center" color="gray">
             <Text>There was an error processing your recording</Text>
           </Box>
         )}

www/app/(app)/transcripts/[transcriptId]/_components/TranscriptWithGutter.tsx

@@ -0,0 +1,106 @@
+import { Box, Text, IconButton } from "@chakra-ui/react";
+import { ChevronUp } from "lucide-react";
+import { Topic } from "../../webSocketTypes";
+import { getTopicColor } from "../../../../lib/topicColors";
+import { TOPICS_SCROLL_DIV_ID } from "./constants";
+
+interface TranscriptWithGutterProps {
+  topics: Topic[];
+  getSpeakerName: (speakerNumber: number) => string | undefined;
+  onGutterClick: (topicId: string) => void;
+}
+
+export function TranscriptWithGutter({
+  topics,
+  getSpeakerName,
+  onGutterClick,
+}: TranscriptWithGutterProps) {
+  const scrollToTopics = () => {
+    // Scroll to the topic list at the top
+    const topicList = document.getElementById(TOPICS_SCROLL_DIV_ID);
+    if (topicList) {
+      topicList.scrollIntoView({
+        behavior: "smooth",
+        block: "start",
+      });
+    }
+  };
+
+  return (
+    <Box>
+      {topics.map((topic, topicIndex) => {
+        const color = getTopicColor(topicIndex);
+
+        return (
+          <Box key={topic.id} position="relative">
+            {/* Topic Header with Up Button */}
+            <Box
+              py={3}
+              px={4}
+              fontWeight="semibold"
+              fontSize="lg"
+              display="flex"
+              alignItems="center"
+              justifyContent="space-between"
+            >
+              <Text>{topic.title}</Text>
+              <IconButton
+                aria-label="Scroll to topics"
+                size="sm"
+                variant="ghost"
+                onClick={scrollToTopics}
+              >
+                <ChevronUp size={16} />
+              </IconButton>
+            </Box>
+
+            {/* Segments container with single gutter */}
+            <Box position="relative">
+              {/* Single continuous gutter for entire topic */}
+              <Box
+                className="topic-gutter"
+                position="absolute"
+                left={0}
+                top={0}
+                bottom={0}
+                width="4px"
+                bg={color}
+                cursor="pointer"
+                transition="all 0.2s"
+                _hover={{
+                  filter: "brightness(1.2)",
+                  width: "6px",
+                }}
+                onClick={() => onGutterClick(topic.id)}
+              />
+
+              {/* Segments */}
+              {topic.segments?.map((segment, segmentIndex) => (
+                <Box
+                  key={segmentIndex}
+                  id={`segment-${topic.id}-${segmentIndex}`}
+                  py={2}
+                  px={4}
+                  pl={12}
+                  _hover={{
+                    bg: "gray.50",
+                  }}
+                >
+                  {/* Segment Content */}
+                  <Text fontSize="sm">
+                    <Text as="span" fontWeight="semibold" color="gray.700">
+                      {getSpeakerName(segment.speaker) ||
+                        `Speaker ${segment.speaker}`}
+                      :
+                    </Text>{" "}
+                    {segment.text}
+                  </Text>
+                </Box>
+              ))}
+            </Box>
+          </Box>
+        );
+      })}
+    </Box>
+  );
+}

www/app/(app)/transcripts/[transcriptId]/_components/constants.ts

@@ -0,0 +1 @@
+export const TOPICS_SCROLL_DIV_ID = "topics-scroll-div";

www/app/(app)/transcripts/[transcriptId]/page.tsx

@@ -3,7 +3,9 @@ import Modal from "../modal";
 import useTopics from "../useTopics";
 import useWaveform from "../useWaveform";
 import useMp3 from "../useMp3";
+import useParticipants from "../useParticipants";
 import { TopicList } from "./_components/TopicList";
+import { TranscriptWithGutter } from "./_components/TranscriptWithGutter";
 import { Topic } from "../webSocketTypes";
 import React, { useEffect, useState, use } from "react";
 import FinalSummary from "./finalSummary";
@@ -45,14 +47,91 @@ export default function TranscriptDetails(details: TranscriptDetails) {
 
   const mp3 = useMp3(transcriptId, waiting);
   const topics = useTopics(transcriptId);
+  const participants = useParticipants(transcriptId);
   const waveform = useWaveform(
     transcriptId,
     waiting || mp3.audioDeleted === true,
   );
   const useActiveTopic = useState<Topic | null>(null);
+  const [activeTopic, setActiveTopic] = useActiveTopic;
   const [finalSummaryElement, setFinalSummaryElement] =
     useState<HTMLDivElement | null>(null);
 
+  // IntersectionObserver for active topic detection based on scroll position
+  useEffect(() => {
+    if (!topics.topics || topics.topics.length === 0) return;
+
+    const observer = new IntersectionObserver(
+      (entries) => {
+        // Find the most visible segment
+        let mostVisibleEntry: IntersectionObserverEntry | null = null;
+        let maxRatio = 0;
+
+        entries.forEach((entry) => {
+          if (entry.isIntersecting && entry.intersectionRatio > maxRatio) {
+            maxRatio = entry.intersectionRatio;
+            mostVisibleEntry = entry;
+          }
+        });
+
+        if (mostVisibleEntry) {
+          // Extract topicId from segment id (format: "segment-{topicId}-{idx}")
+          const segmentId = mostVisibleEntry.target.id;
+          const match = segmentId.match(/^segment-([^-]+)-/);
+          if (match) {
+            const topicId = match[1];
+            const topic = topics.topics?.find((t) => t.id === topicId);
+            if (topic && activeTopic?.id !== topic.id) {
+              setActiveTopic(topic);
+            }
+          }
+        }
+      },
+      {
+        threshold: [0, 0.25, 0.5, 0.75, 1],
+        rootMargin: "-20% 0px -20% 0px",
+      },
+    );
+
+    // Observe all segment elements
+    const segments = document.querySelectorAll('[id^="segment-"]');
+    segments.forEach((segment) => observer.observe(segment));
+
+    return () => observer.disconnect();
+  }, [topics.topics, activeTopic?.id, setActiveTopic]);
+
+  // Scroll handlers for bidirectional navigation
+  const handleTopicClick = (topicId: string) => {
+    // Scroll to first segment of this topic in transcript
+    const firstSegment = document.querySelector(`[id^="segment-${topicId}-"]`);
+    if (firstSegment) {
+      firstSegment.scrollIntoView({
+        behavior: "smooth",
+        block: "center",
+      });
+    }
+  };
+
+  const handleGutterClick = (topicId: string) => {
+    // Scroll to topic in list
+    const topicChip = document.getElementById(`topic-${topicId}`);
+    if (topicChip) {
+      topicChip.scrollIntoView({
+        behavior: "smooth",
+        block: "center",
+      });
+    }
+  };
+
+  const getSpeakerName = (speakerNumber: number) => {
+    if (!participants.response) return `Speaker ${speakerNumber}`;
+    return (
+      participants.response.find(
+        (participant) => participant.speaker == speakerNumber,
+      )?.name || `Speaker ${speakerNumber}`
+    );
+  };
+
   useEffect(() => {
     if (!waiting || !transcript.data) return;
 
@@ -121,7 +200,7 @@ export default function TranscriptDetails(details: TranscriptDetails) {
     <>
       <Grid
         templateColumns="1fr"
-        templateRows="auto minmax(0, 1fr)"
+        templateRows="auto auto"
         gap={4}
         mt={4}
         mb={4}
@@ -153,18 +232,18 @@ export default function TranscriptDetails(details: TranscriptDetails) {
         <Grid
           templateColumns={{ base: "minmax(0, 1fr)", md: "repeat(2, 1fr)" }}
           templateRows={{
-            base: "auto minmax(0, 1fr) minmax(0, 1fr)",
-            md: "auto minmax(0, 1fr)",
+            base: "auto auto auto",
+            md: "auto auto",
           }}
           gap={4}
           gridRowGap={2}
           padding={4}
-          paddingBottom={0}
           background="gray.bg"
           border={"2px solid"}
           borderColor={"gray.bg"}
           borderRadius={8}
         >
+          {/* Title */}
           <GridItem colSpan={{ base: 1, md: 2 }}>
             <Flex direction="column" gap={0}>
               <Flex alignItems="center" gap={2}>
@@ -187,28 +266,64 @@ export default function TranscriptDetails(details: TranscriptDetails) {
               )}
             </Flex>
           </GridItem>
-          <TopicList
-            topics={topics.topics || []}
-            useActiveTopic={useActiveTopic}
-            autoscroll={false}
-            transcriptId={transcriptId}
-            status={transcript.data?.status || null}
-            currentTranscriptText=""
-          />
-          {transcript.data && topics.topics ? (
-            <>
-              <FinalSummary
-                transcript={transcript.data}
-                topics={topics.topics}
-                onUpdate={() => {
-                  transcript.refetch().then(() => {});
+
+          {/* Left column: Topics List */}
+          <GridItem display="flex" flexDirection="column" gap={4} h="100%">
+            <TopicList
+              topics={topics.topics || []}
+              useActiveTopic={useActiveTopic}
+              autoscroll={false}
+              transcriptId={transcriptId}
+              status={transcript.data?.status || null}
+              currentTranscriptText=""
+              onTopicClick={handleTopicClick}
+            />
+
+            {/* Transcript with colored gutter (scrollable) */}
+            {topics.topics && topics.topics.length > 0 && (
+              <Box
+                overflowY="auto"
+                flex={1}
+                minH="0"
+                pr={2}
+                css={{
+                  "&::-webkit-scrollbar": {
+                    width: "8px",
+                  },
+                  "&::-webkit-scrollbar-track": {
+                    background: "transparent",
+                  },
+                  "&::-webkit-scrollbar-thumb": {
+                    background: "#CBD5E0",
+                    borderRadius: "4px",
+                  },
+                  "&::-webkit-scrollbar-thumb:hover": {
+                    background: "#A0AEC0",
+                  },
                 }}
-                finalSummaryRef={setFinalSummaryElement}
-              />
-            </>
+              >
+                <TranscriptWithGutter
+                  topics={topics.topics}
+                  getSpeakerName={getSpeakerName}
+                  onGutterClick={handleGutterClick}
+                />
+              </Box>
+            )}
+          </GridItem>
+
+          {/* Right column: Final Summary */}
+          {transcript.data && topics.topics ? (
+            <FinalSummary
+              transcript={transcript.data}
+              topics={topics.topics}
+              onUpdate={() => {
+                transcript.refetch().then(() => {});
+              }}
+              finalSummaryRef={setFinalSummaryElement}
+            />
           ) : (
-            <Flex justify={"center"} alignItems={"center"} h={"100%"}>
-              <div className="flex flex-col h-full justify-center content-center">
+            <Flex justify="center" alignItems="center" h="100%">
+              <Flex direction="column" h="full" justify="center" align="center">
                 {transcript?.data?.status == "processing" ? (
                   <Text>Loading Transcript</Text>
                 ) : (
@@ -217,7 +332,7 @@ export default function TranscriptDetails(details: TranscriptDetails) {
                     back later
                   </Text>
                 )}
-              </div>
+              </Flex>
             </Flex>
           )}
         </Grid>

www/app/lib/topicColors.ts

@@ -0,0 +1,18 @@
+// Predefined color palette for topics
+// Colors chosen for good contrast and visual distinction
+export const TOPIC_COLORS = [
+  "#3B82F6", // blue
+  "#10B981", // green
+  "#F59E0B", // amber
+  "#EF4444", // red
+  "#8B5CF6", // violet
+  "#EC4899", // pink
+  "#14B8A6", // teal
+  "#F97316", // orange
+  "#6366F1", // indigo
+  "#84CC16", // lime
+] as const;
+
+export function getTopicColor(topicIndex: number): string {
+  return TOPIC_COLORS[topicIndex % TOPIC_COLORS.length];
+}