feat(frontend): add 3d interaction graph

frontend/package-lock.json

@@ -15,6 +15,7 @@
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         "react": "^19.2.0",
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@@ -2022,6 +2032,12 @@
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@@ -2847,6 +2910,12 @@
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@@ -2856,6 +2925,15 @@
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@@ -2958,6 +3036,18 @@
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@@ -3419,6 +3509,20 @@
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+        "preact": "10"
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@@ -3722,11 +3826,19 @@
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+        "@tweenjs/tween.js": "18 - 25",
+        "accessor-fn": "1",
+        "float-tooltip": "^1.7",
+        "kapsule": "^1.16",
+        "polished": "4"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "peerDependencies": {
+        "three": ">=0.168"
+      }
+    },
     "node_modules/tiny-invariant": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/tiny-invariant/-/tiny-invariant-1.3.3.tgz",
       "integrity": "sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg==",
       "license": "MIT"
     },
+    "node_modules/tinycolor2": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/tinycolor2/-/tinycolor2-1.6.0.tgz",
+      "integrity": "sha512-XPaBkWQJdsf3pLKJV9p4qN/S+fm2Oj8AIPo1BTUhg5oxkvm9+SVEGFdhyOz7tTdUTfvxMiAs4sp6/eZO2Ew+pw==",
+      "license": "MIT"
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.15",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",

frontend/package.json

@@ -17,6 +17,7 @@
     "headlessui": "^0.0.0",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
+    "react-force-graph-3d": "^1.29.1",
     "react-router-dom": "^7.13.0",
     "recharts": "^3.7.0"
   },

frontend/src/components/InteractionStats.tsx

@@ -0,0 +1,50 @@
+import ForceGraph3D from "react-force-graph-3d";
+
+import {
+    type UserAnalysisResponse,
+    type InteractionGraph
+} from '../types/ApiTypes';
+
+import StatsStyling from "../styles/stats_styling";
+
+const styles = StatsStyling;
+
+function ApiToGraphData(apiData: InteractionGraph) {
+    const nodes = Object.keys(apiData).map(username => ({ id: username }));
+    const links = [];
+    
+    for (const [source, targets] of Object.entries(apiData)) {
+        for (const [target, count] of Object.entries(targets)) {
+            links.push({ source, target, value: count });
+        }
+    }
+    
+    return { nodes, links };
+}
+
+
+const InteractionStats = (props: { data: UserAnalysisResponse }) => {
+  const graphData = ApiToGraphData(props.data.interaction_graph);
+
+  return (
+    <div style={styles.page}>
+        <h2 style={styles.sectionTitle}>User Interaction Graph</h2>
+        <p style={styles.sectionSubtitle}>
+            This graph visualizes interactions between users based on comments and replies. 
+            Nodes represent users, and edges represent interactions (e.g., comments or replies) between them.
+        </p>
+        <div style={{ height: "600px", border: "1px solid #ccc", borderRadius: 8, marginTop: 16 }}>
+            <ForceGraph3D
+                graphData={graphData}
+                nodeAutoColorBy="id"
+                linkDirectionalParticles={2}
+                linkDirectionalParticleSpeed={0.005}
+                linkWidth={(link) => Math.sqrt(link.value)}
+                nodeLabel={(node) => `${node.id}`}
+            />
+        </div>
+    </div>
+  );
+}
+
+export default InteractionStats;

frontend/src/pages/Stats.tsx

@@ -3,6 +3,7 @@ import axios from "axios";
 import StatsStyling from "../styles/stats_styling";
 import SummaryStats from "../components/SummaryStats";
 import EmotionalStats from "../components/EmotionalStats";
+import InteractionStats from "../components/InteractionStats";
 
 import { 
   type SummaryResponse, 
@@ -16,7 +17,7 @@ const styles = StatsStyling;
 const StatPage = () => {
   const [error, setError] = useState('');
   const [loading, setLoading] = useState(false);
-  const [activeView, setActiveView] = useState<"summary" | "emotional">("summary");
+  const [activeView, setActiveView] = useState<"summary" | "emotional" | "interaction">("summary");
 
   const [userData, setUserData] = useState<UserAnalysisResponse | null>(null);
   const [timeData, setTimeData] = useState<TimeAnalysisResponse | null>(null);
@@ -133,6 +134,13 @@ return (
       >
         Emotional
       </button>
+
+      <button
+        onClick={() => setActiveView("interaction")}
+        style={activeView === "interaction" ? styles.buttonPrimary : styles.buttonSecondary}
+      >
+        Interaction
+      </button>
     </div>
 
     {activeView === "summary" && (
@@ -154,6 +162,10 @@ return (
       </div>
     )}
 
+    {activeView === "interaction" && userData && (
+      <InteractionStats data={userData} />
+    )}
+
   </div>
 );
 }

frontend/src/types/ApiTypes.ts

@@ -35,9 +35,12 @@ type User = {
   vocab?: Vocab | null;
 };
 
+type InteractionGraph = Record<string, Record<string, number>>;
+
 type UserAnalysisResponse = {
   top_users: TopUser[];
   users: User[];
+  interaction_graph: InteractionGraph;
 };
 
 // Time Analysis
@@ -89,6 +92,7 @@ export type {
     TopUser,
     Vocab,
     User,
+    InteractionGraph,
     UserAnalysisResponse,
     FrequencyWord,
     AverageEmotionByTopic,

server/app.py

@@ -12,7 +12,7 @@ app = Flask(__name__)
 CORS(app, resources={r"/*": {"origins": "http://localhost:5173"}})
 
 # Global State
-posts_df = pd.read_json('posts.jsonl', lines=True)
+posts_df = pd.read_json('small.jsonl', lines=True)
 with open("topic_buckets.json", "r", encoding="utf-8") as f:
     domain_topics = json.load(f)
 stat_obj = StatGen(posts_df, domain_topics)