admin-govern/src/utils/echartMethod.ts

const dataProcessing = (arr: any[]) => {
    return arr
        .filter(item => typeof item == 'number' || (typeof item == 'string' && !isNaN(parseFloat(item))))
        .map(item => (typeof item == 'number' ? item : parseFloat(item)))
}

// 处理y轴最大最小值
export const yMethod = (arr: any) => {
    const numList = dataProcessing(arr);
    const maxValue = Math.max(...numList);
    const minValue = Math.min(...numList);
    
    const calculateBoundary = (value: number, base: number) => {
        return Math[value > 0? 'ceil' : 'floor'](value / base) * base;
    };

    let max: number;
    let min: number;
    if (maxValue > 1000 || minValue < -1000) {
        max = calculateBoundary(maxValue, 100);
        min = minValue == 0? 0 : calculateBoundary(minValue, 100);
    } else if (maxValue < 60 && minValue > 40) {
        max = 60;
        min = 40;
    } else if (maxValue == minValue) {
        if (maxValue < 10 && minValue > 0) {
            max = calculateBoundary(maxValue, 10);
            min = calculateBoundary(minValue, 10);
        } else if (maxValue!== 0 && minValue!== 0) {
            max = calculateBoundary(maxValue / 10 + 1, 10);
            min = calculateBoundary(minValue / 10 - 1, 10);
        }
    } else {
        max = calculateBoundary(maxValue, 10);
        min = calculateBoundary(minValue, 10);
    }

    if (maxValue > 0 && maxValue < 1) {
        max = 1;
    }
    if (max == 0 && minValue > -1 && minValue < 0) {
        min = -1;
    }

    return [min, max];
};

/**
 * title['A相','B相',]
 * data[[1,2],[3,4]]
 */
// 导出csv文件
const convertToCSV = (title: object, data: any) => {
    // console.log('🚀 ~ convertToCSV ~ data:', data)
    let csv = ''
    // 添加列头
    csv += ',' + title.join(',') + '\n'
    // 遍历数据并添加到CSV字符串中
    data?.map(item => {
        csv += item.join(',') + '\n'
    })
    return csv
}
export const exportCSV = (title: object, data: any, filename: string) => {
    const csv = convertToCSV(title, data)
    const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' })
    const link = document.createElement('a')
    link.href = URL.createObjectURL(blob)
    link.download = filename
    link.click()
    // 释放URL对象
    URL.revokeObjectURL(link.href)
}