[frontend]: Add ObjectTypeProportionPieChart

frontend/src/components/Statistics.jsx

@@ -1,10 +1,44 @@
-import React from "react";
+import React, { useState, useEffect, useMemo } from "react";
+import ObjectTypeProportionPieChart from "./charts/ObjectTypeProportionPieChart";
+import LoadingOverlay from "./LoadingOverlay.jsx";
 
 const Statistics = () => {
+    const [transientTypes, setTransientTypes] = useState([]);
+    const [loading, setLoading] = useState(true);
+    const [error, setError] = useState("");
+
+    useEffect(() => {
+        const fetchData = async () => {
+            try {
+                const response = await fetch("https://281bc6mcm5.execute-api.us-east-1.amazonaws.com/transient_data");
+                if (!response.ok) throw new Error("Network response was not ok");
+
+                const rawData = await response.json();
+
+                const transientTypes = rawData
+                    .map((item) => item.objectType)
+                    .map((type) => type.replace(/([a-z])([A-Z])/g, '$1 $2').replace(/([A-Z])([A-Z][a-z])/g, '$1 $2'));
+                setTransientTypes(transientTypes);
+
+            } catch (err) {
+                setError("Failed to fetch data");
+            } finally {
+                setLoading(false);
+            }
+        };
+
+        fetchData();
+    }, []);
+
+    if (loading) return <LoadingOverlay message={"Fetching data..."} />;
+    if (error) return <p className="text-center text-red-500">{error}</p>;
+
     return (
-        <div style={{height: "100vh", width: "100vw", display: "flex", position: "relative", paddingTop: "5vh"}}>
-            <h1 className="text-2xl font-bold mb-4">About This Application</h1>
-            <p>This application provides real-time and permanent data on Irish Rail, Luas, and bus services.</p>
+        <div
+            style={{ height: "100vh", width: "100vw", display: "flex", position: "relative", paddingTop: "5vh" }}
+            className="min-h-screen flex flex-col items-center justify-center bg-gray-100 p-4"
+        >
+            <ObjectTypeProportionPieChart label="Current Transport Type Proportion" dataList={transientTypes} />
         </div>
     );
 };

frontend/src/components/charts/ObjectTypeProportionPieChart.jsx

@@ -0,0 +1,45 @@
+import { PieChart, Pie, Cell, Tooltip, Legend, ResponsiveContainer } from "recharts";
+
+const COLORS = ["#8884d8", "#82ca9d", "#FFBB28", "#FF8042"];
+
+const ObjectTypeProportionPieChart = ({ label, dataList }) => {
+    // Count occurrences of each unique string
+    const typeCounts = dataList.reduce((acc, type) => {
+        acc[type] = (acc[type] || 0) + 1;
+        return acc;
+    }, {});
+
+    // Convert to array format for Recharts
+    const chartData = Object.keys(typeCounts).map((key) => ({
+        name: key,
+        value: typeCounts[key],
+    }));
+
+    return (
+        <div className="flex flex-col items-center p-4 bg-white shadow-lg rounded-lg w-full max-w-md">
+            <h2 className="text-xl font-semibold text-center mb-4">{label}</h2>
+            <ResponsiveContainer width={300} height={300}>
+                <PieChart>
+                    <Pie
+                        data={chartData}
+                        dataKey="value"
+                        nameKey="name"
+                        cx="50%"
+                        cy="50%"
+                        outerRadius={100}
+                        fill="#8884d8"
+                        label
+                    >
+                        {chartData.map((entry, index) => (
+                            <Cell key={`cell-${index}`} fill={COLORS[index % COLORS.length]} />
+                        ))}
+                    </Pie>
+                    <Tooltip />
+                    <Legend />
+                </PieChart>
+            </ResponsiveContainer>
+        </div>
+    );
+};
+
+export default ObjectTypeProportionPieChart;