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1. ããŒã¿åã®å®çŸ©
ãŸããTypeScriptã€ã³ã¿ãŒãã§ãŒã¹ã䜿çšããŠããŒã¿ã®åãå®çŸ©ããå¿ èŠããããŸãã
interface SalesData {
productName: string;
region: string;
salesAmount: number;
date: Date;
}
interface ProductSales {
productName: string;
totalSales: number;
}
interface RegionSales {
region: string;
totalSales: number;
}
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2. ããŒã¿ã®ååŸãšåŠç
次ã«ãããŒã¿ãœãŒã¹ïŒäŸïŒããŒã¿ããŒã¹ãAPIïŒãã売äžããŒã¿ãååŸããŸããTypeScriptã䜿çšããŠãããŒã¿ãæ£ããè§£æããã³æ€èšŒãããããšãä¿èšŒããŸãã
async function fetchSalesData(): Promise<SalesData[]> {
// Replace with your actual data fetching logic
const response = await fetch('/api/sales');
const data = await response.json();
// Validate the data using a type guard (optional)
if (!Array.isArray(data) || !data.every((item: any) => typeof item.productName === 'string' && typeof item.region === 'string' && typeof item.salesAmount === 'number' && item.date instanceof Date)) {
throw new Error('Invalid sales data format');
}
return data as SalesData[];
}
function calculateProductSales(salesData: SalesData[]): ProductSales[] {
const productSalesMap: { [productName: string]: number } = {};
salesData.forEach((sale) => {
if (productSalesMap[sale.productName]) {
productSalesMap[sale.productName] += sale.salesAmount;
} else {
productSalesMap[sale.productName] = sale.salesAmount;
}
});
const productSales: ProductSales[] = Object.entries(productSalesMap).map(
([productName, totalSales]) => ({
productName,
totalSales,
})
);
return productSales.sort((a, b) => b.totalSales - a.totalSales);
}
function calculateRegionSales(salesData: SalesData[]): RegionSales[] {
const regionSalesMap: { [region: string]: number } = {};
salesData.forEach((sale) => {
if (regionSalesMap[sale.region]) {
regionSalesMap[sale.region] += sale.salesAmount;
} else {
regionSalesMap[sale.region] = sale.salesAmount;
}
});
const regionSales: RegionSales[] = Object.entries(regionSalesMap).map(
([region, totalSales]) => ({
region,
totalSales,
})
);
return regionSales.sort((a, b) => b.totalSales - a.totalSales);
}
fetchSalesData颿°ã¯APIãšã³ããã€ã³ãããããŒã¿ãååŸããåã¢ãµãŒã·ã§ã³ïŒas SalesData[]ïŒã䜿çšããŠãããŒã¿ãSalesDataã€ã³ã¿ãŒãã§ãŒã¹ã«æºæ ããŠããããšãTypeScriptã«äŒããŸãããŸããããŒã¿ã®æ§é ã®ã©ã³ã¿ã€ã æ€èšŒãä¿èšŒããããã«ãåã¬ãŒããå®è£
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// Example using Chart.js
async function renderCharts() {
const salesData = await fetchSalesData();
const productSales = calculateProductSales(salesData);
const regionSales = calculateRegionSales(salesData);
// Render product sales chart
const productChartCanvas = document.getElementById('productChart') as HTMLCanvasElement;
if (productChartCanvas) {
new Chart(productChartCanvas.getContext('2d')!, {
type: 'bar',
data: {
labels: productSales.map((sale) => sale.productName),
datasets: [{
label: 'Total Sales',
data: productSales.map((sale) => sale.totalSales),
backgroundColor: 'rgba(54, 162, 235, 0.2)',
borderColor: 'rgba(54, 162, 235, 1)',
borderWidth: 1
}]
},
options: {
scales: {
y: {
beginAtZero: true
}
}
}
});
}
// Render region sales chart (similar structure)
}
renderCharts();
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