code-bang/backend/application/common/service/MessageService.php

<?php

namespace app\common\service;

use app\common\model\Messages;
use app\common\traits\ServiceTrait;
use think\Log;

class MessageService
{
    use ServiceTrait;

    /** @var Messages */
    public static $Model = Messages::class;

    // 消息类型
    const TYPE_SYSTEM = '0'; //系统消息：账户、审核、安全类
    const TYPE_NOTICE = '1'; //公告消息：平台运营公告
    const TYPE_DEMAND = '2'; //需求消息：需求/工单/合同/订单等业务流程


    /**
     * @param $to_user_id
     * @param $title
     * @param $content
     * @param $extra_json
     * @param $from_user_id
     * @return mixed
     * @throws \Exception
     */
    public static function createData($to_user_id, $title, $content, $extra_json = [], $from_user_id = 0, $message_type = self::TYPE_SYSTEM)
    {
        $data = [
            'message_type' => $message_type,
            'from_user_id' => $from_user_id,
            'to_user_id' => $to_user_id,
            'title' => $title,
            'content' => $content,
            'extra_json' => $extra_json,
            'is_read' => CommonService::STATUS_OFF,
        ];

        $res = self::create($data);
        if (!$res) {
            Log::info(__METHOD__ . '-写入数据失败失败:' . json_encode($data, JSON_UNESCAPED_UNICODE));
            exception('写入数据失败失败');
        }

        return $res;
    }

    /**
     * 发送订阅消息时同步写入站内消息
     * 数据来源：MSG_MAP 中模板的 name / message_type / valueNames / remark / page
     * @param int $to_user_id 收件用户
     * @param string $template_id 订阅消息模板ID
     * @param array $msgData sendMsg 的原始参数 ['values'=>[], 'param'=>[], 'page'=>'']
     * @param string $page 打包后的跳转页面（含query），如 pages/demand/list/index?opType=my&demandId=1
     * @return mixed
     */
    public static function createBySubscribe($to_user_id, $template_id, array $msgData = [], $page = '')
    {
        $template = SubscribeMessageService::MSG_MAP[$template_id] ?? [];
        if (!$template) {
            //未定义的模板不写站内消息
            return false;
        }

        //按模板字段名组装可读内容：工单号：xxx；服务项目：xxx；...；备注：xxx
        $values = $msgData['values'] ?? [];
        $valueNames = $template['valueNames'] ?? [];
        $lines = [];
        foreach ($valueNames as $key => $name) {
            if (isset($values[$key]) && $values[$key] !== '') {
                $lines[] = $name . '：' . $values[$key];
            }
        }
        // 备注处理：避免正文出现两行「备注」或语义冲突
        // 1) 模板字段里已含「备注」时，发送方自定义了备注文案，不再追加模板默认 remark
        // 2) 否则仅在正文尚未包含 remark 时追加，避免重复
        $remark = $template['remark'] ?? '';
        $hasRemarkField = in_array('备注', $valueNames, true);
        if ($remark !== '' && !$hasRemarkField) {
            $content = implode("\n", $lines);
            if (mb_strpos($content, $remark) === false) {
                $lines[] = '备注：' . $remark;
            }
        }
        $content = implode("\n", $lines);

        return self::createData(
            $to_user_id,
            $template['name'] ?? '系统通知',
            $content,
            [
                'page' => $page ?: ($template['page'] ?? ''),
                'template_id' => $template_id,
            ],
            0, //系统发出
            $template['message_type'] ?? self::TYPE_SYSTEM
        );
    }
}