mtb_crm_asp/statistics_utils.php

<?php
/**
 * 统计分析工具函数
 * 
 * 包含所有统计模块共用的工具函数和日期处理逻辑
 */

// 确保直接访问时需要先登录
require_once 'conn.php';

if (!isset($_SESSION['employee_id'])) {
    checkLogin();
}

/**
 * 获取和处理日期范围参数
 * 
 * @return array 包含开始日期、结束日期和其他日期相关参数
 */
function getDateRangeParams() {
    // 计算日期范围
    $current_month_start = date('Y-m-01');
    $current_month_end = date('Y-m-t');
    $last_month_start = date('Y-m-01', strtotime('-1 month'));
    $last_month_end = date('Y-m-t', strtotime('-1 month'));
    $current_year_start = date('Y-01-01');
    $current_year_end = date('Y-12-31');

    // 可选的日期范围筛选
    $date_range = isset($_GET['date_range']) ? $_GET['date_range'] : 'current_month';
    $custom_start = isset($_GET['start_date']) ? $_GET['start_date'] : '';
    $custom_end = isset($_GET['end_date']) ? $_GET['end_date'] : '';
    $period = isset($_GET['period']) ? $_GET['period'] : 'day';

    // 设置日期范围
    if ($date_range == 'custom' && !empty($custom_start) && !empty($custom_end)) {
        $start_date = $custom_start;
        $end_date = $custom_end;
    } else {
        switch ($date_range) {
            case 'last_month':
                $start_date = $last_month_start;
                $end_date = $last_month_end;
                break;
            case 'current_year':
                $start_date = $current_year_start;
                $end_date = $current_year_end;
                break;
            case 'last_30_days':
                $start_date = date('Y-m-d', strtotime('-30 days'));
                $end_date = date('Y-m-d');
                break;
            case 'last_90_days':
                $start_date = date('Y-m-d', strtotime('-90 days'));
                $end_date = date('Y-m-d');
                break;
            case 'current_month':
            default:
                $start_date = $current_month_start;
                $end_date = $current_month_end;
                break;
        }
    }

    // 格式化日期用于SQL查询
    $start_date_sql = date('Y-m-d', strtotime($start_date));
    $end_date_sql = date('Y-m-d', strtotime($end_date)) . ' 23:59:59';

    return [
        'date_range' => $date_range,
        'custom_start' => $custom_start,
        'custom_end' => $custom_end,
        'period' => $period,
        'start_date' => $start_date,
        'end_date' => $end_date,
        'start_date_sql' => $start_date_sql,
        'end_date_sql' => $end_date_sql
    ];
}

/**
 * 生成图表颜色数组
 * 
 * @param int $count 需要的颜色数量
 * @param bool $transparent 是否透明
 * @return array 背景色和边框色数组
 */
function generateChartColors($count = 10, $transparent = true) {
    $colors = [
        ['rgba(255, 99, 132, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(255, 99, 132, 1)'],
        ['rgba(54, 162, 235, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(54, 162, 235, 1)'],
        ['rgba(255, 206, 86, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(255, 206, 86, 1)'],
        ['rgba(75, 192, 192, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(75, 192, 192, 1)'],
        ['rgba(153, 102, 255, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(153, 102, 255, 1)'],
        ['rgba(255, 159, 64, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(255, 159, 64, 1)'],
        ['rgba(199, 199, 199, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(199, 199, 199, 1)'],
        ['rgba(83, 102, 255, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(83, 102, 255, 1)'],
        ['rgba(40, 159, 64, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(40, 159, 64, 1)'],
        ['rgba(210, 199, 199, ' . ($transparent ? '0.7' : '1') . ')', 'rgba(210, 199, 199, 1)']
    ];
    
    $result = [];
    
    // 确保有足够的颜色
    while (count($result) < $count) {
        foreach ($colors as $color) {
            $result[] = $color;
            if (count($result) >= $count) {
                break;
            }
        }
    }
    
    return array_slice($result, 0, $count);
}

/**
 * 格式化数值，处理空值和小数位数
 * 
 * @param mixed $value 要格式化的值
 * @param int $decimals 小数位数
 * @return string 格式化后的数值
 */
function formatNumber($value, $decimals = 2) {
    if ($value === null || $value === '') {
        return '0';
    }
    return number_format((float)$value, $decimals);
}