cloc-graph/dist/services/chartService.js

Track lines of code over time by language with visualization

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.generateChart = generateChart;
/**
 * Chart generation service
 */
const chartjs_node_canvas_1 = require("chartjs-node-canvas");
const fs = __importStar(require("fs-extra"));
/**
 * Generate a chart visualization of code lines over time
 *
 * @param records - Data records with lines of code by language
 * @param languages - List of languages to include in the chart
 * @param outputPath - Path where the chart image will be saved
 * @returns Promise that resolves when the chart is generated
 */
function generateChart(records_1, languages_1) {
    return __awaiter(this, arguments, void 0, function* (records, languages, outputPath = "loc_chart.png") {
        const width = 800;
        const height = 600;
        const chartJSNodeCanvas = new chartjs_node_canvas_1.ChartJSNodeCanvas({
            width,
            height,
            backgroundColour: "white",
        });
        // Prepare data for chart
        const dates = records.map((r) => r.date);
        const datasets = languages.map((lang) => ({
            label: lang,
            data: records.map((r) => r[lang] || 0),
            fill: false,
            borderWidth: 2,
            tension: 0.1,
        }));
        // Generate different colors for each language
        datasets.forEach((dataset, i) => {
            const hue = (i * 360) / datasets.length;
            dataset.borderColor = `hsl(${hue}, 70%, 60%)`;
            dataset.backgroundColor = `hsla(${hue}, 70%, 60%, 0.2)`;
        });
        // Configuration for the chart
        const configuration = {
            type: "line",
            data: {
                labels: dates,
                datasets,
            },
            options: {
                responsive: true,
                plugins: {
                    title: {
                        display: true,
                        text: "Lines of Code Over Time by Language",
                    },
                    legend: {
                        position: "right",
                    },
                },
                scales: {
                    x: {
                        display: true,
                        title: {
                            display: true,
                            text: "Date",
                        },
                    },
                    y: {
                        display: true,
                        title: {
                            display: true,
                            text: "Lines of Code",
                        },
                        beginAtZero: true,
                    },
                },
            },
        };
        // Generate image
        const buffer = yield chartJSNodeCanvas.renderToBuffer(configuration);
        fs.writeFileSync(outputPath, buffer);
        console.log(`Chart saved as ${outputPath}`);
    });
}