/**
 * 保存服务端向客户端发送的“推送消息”。当用户A向用户B发送消息，服务器会保存此消息，并构建一条通知消息保存到数据库，
 * 并通过个推系统向B发送此消息。
 */
"use strict";

let log = require('../../util/log');
let ImDb = require("../mysql/db/im.db.js");

class NotifyMsgRepo {
    /**
     * 保存推送消息。
     *
     * @param to
     * @param contentType
     * @param title
     * @param content
     * @param message
     * @param has_pushed
     * @param delay
     * @param handler
     */
    static save(to, contentType, title, content, message, has_pushed, delay, handler) {
        ImDb.execQuery({
            "sql": "INSERT INTO push_notify (to_uid, type, title, content, data, delay, has_pushed) VALUES (?,?,?,?,?,?,?)",
            "args": [to, contentType, title, content, message, delay, has_pushed],
            "handler": handler
        });
    };

    /**
     * 查找未推送的消息。
     */
    static findUnpushedMessages(handler) {
        let sql = "select to_uid, title, type, content, data, delay " +
            "FROM push_notify " +
            "WHERE delay IS NOT NULL AND delay > now()";

        ImDb.execQuery({
            "sql": sql,
            "args": [],
            "handler": handler
        });
    };
}
module.exports = NotifyMsgRepo;