Add Visualisasi Masa Studi

app/api/mahasiswa/masa-studi-status/route.ts

@@ -0,0 +1,95 @@
+import { NextResponse } from 'next/server';
+import supabase from '@/lib/db';
+
+interface MasaStudiData {
+  tahun_angkatan: number;
+  status_kuliah: string;
+  rata_rata_masa_studi_tahun: number;
+}
+
+export async function GET(req: Request) {
+  try {
+    const { searchParams } = new URL(req.url);
+    const tahun_angkatan = searchParams.get('tahun_angkatan');
+    const status_kuliah = searchParams.get('status_kuliah');
+
+    let query = supabase
+      .from('mahasiswa')
+      .select('tahun_angkatan, status_kuliah, semester')
+      .not('semester', 'is', null);
+
+    if (tahun_angkatan && tahun_angkatan !== 'all') {
+      query = query.eq('tahun_angkatan', tahun_angkatan);
+    }
+    if (status_kuliah && status_kuliah !== 'all') {
+      query = query.eq('status_kuliah', status_kuliah);
+    }
+
+    const { data, error } = await query;
+
+    if (error) {
+      console.error('Error fetching masa studi data:', error);
+      return NextResponse.json(
+        { error: 'Failed to fetch masa studi data' },
+        {
+          status: 500,
+          headers: {
+            'Access-Control-Allow-Origin': '*',
+            'Access-Control-Allow-Methods': 'GET, OPTIONS',
+            'Access-Control-Allow-Headers': 'Content-Type, Authorization',
+          },
+        }
+      );
+    }
+
+    // Group by tahun_angkatan and status_kuliah, calculate average semester/2
+    const groupedData = data.reduce((acc, item) => {
+      const tahun = item.tahun_angkatan;
+      const status = item.status_kuliah;
+      const key = `${tahun}|${status}`;
+      if (!acc[key]) {
+        acc[key] = { sum: 0, count: 0, tahun_angkatan: tahun, status_kuliah: status };
+      }
+      acc[key].sum += item.semester || 0;
+      acc[key].count += 1;
+      return acc;
+    }, {} as Record<string, { sum: number; count: number; tahun_angkatan: number; status_kuliah: string }>);
+
+    // Convert to final format
+    const results: MasaStudiData[] = Object.values(groupedData).map((data) => ({
+      tahun_angkatan: data.tahun_angkatan,
+      status_kuliah: data.status_kuliah,
+      rata_rata_masa_studi_tahun: Math.round(((data.sum / data.count) / 2) * 10) / 10,
+    }));
+
+    // Sort by tahun_angkatan, status_kuliah
+    results.sort((a, b) => {
+      if (a.tahun_angkatan !== b.tahun_angkatan) {
+        return a.tahun_angkatan - b.tahun_angkatan;
+      }
+      return a.status_kuliah.localeCompare(b.status_kuliah);
+    });
+
+    return NextResponse.json(results, {
+      headers: {
+        'Cache-Control': 'public, max-age=60, stale-while-revalidate=30',
+        'Access-Control-Allow-Origin': '*',
+        'Access-Control-Allow-Methods': 'GET, OPTIONS',
+        'Access-Control-Allow-Headers': 'Content-Type, Authorization',
+      },
+    });
+  } catch (error) {
+    console.error('Error fetching masa studi data:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch masa studi data' },
+      {
+        status: 500,
+        headers: {
+          'Access-Control-Allow-Origin': '*',
+          'Access-Control-Allow-Methods': 'GET, OPTIONS',
+          'Access-Control-Allow-Headers': 'Content-Type, Authorization',
+        },
+      }
+    );
+  }
+} 

app/visualisasi/status/page.tsx

@@ -9,6 +9,7 @@ import JenisPendaftaranStatusChart from "@/components/charts/JenisPendaftaranSta
 import JenisPendaftaranStatusPieChart from "@/components/charts/JenisPendaftaranStatusPieChart";
 import AsalDaerahStatusChart from '@/components/charts/AsalDaerahStatusChart';
 import IpkStatusChart from '@/components/charts/IpkStatusChart';
+import MasaStudiChart from '@/components/charts/MasaStudiChart';
 import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
 
 export default function StatusMahasiswaPage() {
@@ -51,6 +52,10 @@ export default function StatusMahasiswaPage() {
               selectedYear={selectedYear}
               selectedStatus={selectedStatus}
             />
+            <MasaStudiChart
+            selectedYear={selectedYear}
+            selectedStatus={selectedStatus}
+            />
             <IpkStatusChart
             selectedYear={selectedYear}
             selectedStatus={selectedStatus}

components/charts/IpkStatusChart.tsx

@@ -109,7 +109,7 @@ export default function IpkStatusChart({ selectedYear, selectedStatus }: Props)
       },
     },
     stroke: {
-      curve: 'smooth',
+      curve: 'straight',
       width: 3,
       lineCap: 'round'
     },

components/charts/MasaStudiChart.tsx

@@ -0,0 +1,272 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import dynamic from 'next/dynamic';
+import { ApexOptions } from 'apexcharts';
+import { useTheme } from 'next-themes';
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+
+const Chart = dynamic(() => import('react-apexcharts'), { ssr: false });
+
+interface MasaStudiData {
+  tahun_angkatan: number;
+  status_kuliah: string;
+  rata_rata_masa_studi_tahun: number;
+}
+
+interface Props {
+  selectedYear: string;
+  selectedStatus: string;
+}
+
+export default function MasaStudiChart({ selectedYear, selectedStatus }: Props) {
+  const { theme } = useTheme();
+  const [mounted, setMounted] = useState(false);
+  const [data, setData] = useState<MasaStudiData[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  useEffect(() => {
+    const fetchData = async () => {
+      try {
+        setLoading(true);
+        setError(null);
+        let url = '/api/mahasiswa/masa-studi-status';
+        const params = [];
+        if (selectedYear && selectedYear !== 'all') params.push(`tahun_angkatan=${selectedYear}`);
+        if (selectedStatus && selectedStatus !== 'all') params.push(`status_kuliah=${encodeURIComponent(selectedStatus)}`);
+        if (params.length > 0) url += '?' + params.join('&');
+        const response = await fetch(url);
+        if (!response.ok) {
+          throw new Error(`Failed to fetch data: ${response.status} ${response.statusText}`);
+        }
+        const result = await response.json();
+        if (!Array.isArray(result)) {
+          throw new Error('Invalid data format received from server');
+        }
+        // Sort data by tahun_angkatan
+        const sortedData = result.sort((a: MasaStudiData, b: MasaStudiData) => a.tahun_angkatan - b.tahun_angkatan);
+        setData(sortedData);
+      } catch (err) {
+        setError(err instanceof Error ? err.message : 'An error occurred while fetching data');
+      } finally {
+        setLoading(false);
+      }
+    };
+    fetchData();
+  }, [selectedYear, selectedStatus]);
+
+  // Chart options and series
+  const chartOptions: ApexOptions = {
+    chart: {
+      type: selectedYear === 'all' ? 'line' : 'bar',
+      toolbar: {
+        show: true,
+        tools: {
+          download: true,
+          selection: true,
+          zoom: true,
+          zoomin: true,
+          zoomout: true,
+          pan: true,
+          reset: true
+        }
+      },
+      background: theme === 'dark' ? '#0F172B' : '#fff',
+      zoom: {
+        enabled: true,
+        type: 'x',
+        autoScaleYaxis: true
+      }
+    },
+    plotOptions: {
+      bar: {
+        horizontal: false,
+        columnWidth: '55%',
+        borderRadius: 4,
+      },
+    },
+    stroke: {
+      curve: 'straight',
+      width: 3,
+      lineCap: 'round'
+    },
+    markers: {
+      size: 5,
+      strokeWidth: 2,
+      strokeColors: theme === 'dark' ? ['#fff'] : ['#10B981'],
+      colors: ['#10B981'],
+      hover: {
+        size: 7
+      }
+    },
+    dataLabels: {
+      enabled: true,
+      formatter: function (val: number) {
+        return val.toFixed(1);
+      },
+      style: {
+        fontSize: '14px',
+        fontWeight: 'bold',
+        colors: [theme === 'dark' ? '#fff' : '#000']
+      },
+      background: {
+        enabled: false
+      },
+      offsetY: -10
+    },
+    xaxis: {
+      categories: data.map(item => item.tahun_angkatan.toString()),
+      title: {
+        text: 'Tahun Angkatan',
+        style: {
+          fontSize: '14px',
+          fontWeight: 'bold',
+          color: theme === 'dark' ? '#fff' : '#000'
+        }
+      },
+      labels: {
+        style: {
+          fontSize: '12px',
+          colors: theme === 'dark' ? '#fff' : '#000'
+        }
+      },
+      axisBorder: {
+        show: true,
+        color: theme === 'dark' ? '#374151' : '#E5E7EB'
+      },
+      axisTicks: {
+        show: true,
+        color: theme === 'dark' ? '#374151' : '#E5E7EB'
+      }
+    },
+    yaxis: {
+      title: {
+        text: 'Rata-rata Masa Studi (tahun)',
+        style: {
+          fontSize: '14px',
+          fontWeight: 'bold',
+          color: theme === 'dark' ? '#fff' : '#000'
+        }
+      },
+      min: 0,
+      max: 8,
+      labels: {
+        style: {
+          fontSize: '12px',
+          colors: theme === 'dark' ? '#fff' : '#000'
+        },
+        formatter: function (val: number) {
+          return val.toFixed(1);
+        }
+      },
+      axisBorder: {
+        show: true,
+        color: theme === 'dark' ? '#374151' : '#E5E7EB'
+      }
+    },
+    grid: {
+      borderColor: theme === 'dark' ? '#374151' : '#E5E7EB',
+      strokeDashArray: 4,
+      padding: {
+        top: 20,
+        right: 0,
+        bottom: 0,
+        left: 0
+      }
+    },
+    colors: ['#10B981'],
+    tooltip: {
+      theme: theme === 'dark' ? 'dark' : 'light',
+      y: {
+        formatter: function (val: number) {
+          return val.toFixed(1);
+        }
+      },
+      marker: {
+        show: true
+      }
+    },
+    legend: {
+      show: true,
+      position: 'top',
+      horizontalAlign: 'right',
+      labels: {
+        colors: theme === 'dark' ? '#fff' : '#000'
+      }
+    }
+  };
+
+  const series = [{
+    name: 'Rata-rata Masa Studi (tahun)',
+    data: data.map(item => item.rata_rata_masa_studi_tahun)
+  }];
+
+  if (!mounted) {
+    return null;
+  }
+
+  if (loading) {
+    return (
+      <Card className="bg-white dark:bg-slate-900 shadow-lg">
+        <CardHeader>
+          <CardTitle className="text-xl font-bold dark:text-white">
+            Loading...
+          </CardTitle>
+        </CardHeader>
+      </Card>
+    );
+  }
+
+  if (error) {
+    return (
+      <Card className="bg-white dark:bg-slate-900 shadow-lg">
+        <CardHeader>
+          <CardTitle className="text-xl font-bold text-red-500 dark:text-red-400">
+            Error: {error}
+          </CardTitle>
+        </CardHeader>
+      </Card>
+    );
+  }
+
+  if (data.length === 0) {
+    return (
+      <Card className="bg-white dark:bg-slate-900 shadow-lg">
+        <CardHeader>
+          <CardTitle className="text-xl font-bold dark:text-white">
+            Tidak ada data yang tersedia
+          </CardTitle>
+        </CardHeader>
+      </Card>
+    );
+  }
+
+  return (
+    <Card className="bg-white dark:bg-slate-900 shadow-lg">
+      <CardHeader>
+        <CardTitle className="text-xl font-bold dark:text-white">
+          Rata-rata Masa Studi Mahasiswa {selectedStatus !== 'all' ? selectedStatus : ''}
+          {selectedYear !== 'all' ? ` Angkatan ${selectedYear}` : ''}
+        </CardTitle>
+      </CardHeader>
+      <CardContent>
+        <div className="h-[300px] sm:h-[350px] md:h-[300px] w-full max-w-5xl mx-auto">
+          {typeof window !== 'undefined' && (
+            <Chart
+              options={chartOptions}
+              series={series}
+              type={selectedYear === 'all' ? 'line' : 'bar'}
+              height="100%"
+              width="100%"
+            />
+          )}
+        </div>
+      </CardContent>
+    </Card>
+  );
+}