gemini-cost-tracker/dist/services/formatter/csvFormatter.js

CLI tool to display token usage and costs for Gemini and Vertex AI

import { formatDateTime } from '../../utils/dateHelper.js';
export class CSVFormatter {
    format(data) {
        const headers = [
            'Date',
            'Service',
            'Model',
            'Usage ID',
            'Input Tokens',
            'Output Tokens',
            'Total Tokens',
            'Input Cost',
            'Output Cost',
            'Total Cost',
            'Currency',
            'Project',
            'Region',
            'Calculated At',
        ];
        let csv = headers.join(',') + '\n';
        for (const detail of data.details) {
            // Handle null usage and cost objects gracefully
            const usage = detail.usage || {
                id: '',
                inputTokens: 0,
                outputTokens: 0,
                project: '',
                region: '',
            };
            const cost = detail.cost || {
                inputCost: 0,
                outputCost: 0,
                totalCost: 0,
                currency: '',
                calculatedAt: null,
            };
            const row = [
                this.formatCsvValue(formatDateTime(detail.date)),
                this.formatCsvValue(detail.service || ''),
                this.formatCsvValue(detail.model || ''),
                this.formatCsvValue(usage.id),
                usage.inputTokens.toString(),
                usage.outputTokens.toString(),
                (usage.inputTokens + usage.outputTokens).toString(),
                cost.inputCost.toFixed(6),
                cost.outputCost.toFixed(6),
                cost.totalCost.toFixed(6),
                this.formatCsvValue(cost.currency),
                this.formatCsvValue(usage.project || ''),
                this.formatCsvValue(usage.region || ''),
                this.formatCsvValue(formatDateTime(cost.calculatedAt)),
            ];
            csv += row.join(',') + '\n';
        }
        return csv;
    }
    formatCsvValue(value) {
        // Escape CSV values that contain commas, quotes, or newlines
        if (value.includes(',') || value.includes('"') || value.includes('\n')) {
            return `"${value.replace(/"/g, '""')}"`;
        }
        return value;
    }
}
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