Zabbix JS Script item for count of day-before Alerts

CONTEXT.md

• Where? https://t.me/ZabbixTech

• Question: Hi team...is there any query where we can get the count of alarms raised per day?

• Answer: Since version 6.0 you can create an API key and then do an JavaScript Script Item to check the information from Zabbix API using time_from and time_till parameters to filter the day before. Didn't tested, just prototyped the idea below, and before trying the code, remember to add the "url" and "apikey" to the item Parameters, (and please use a macro with vault for your apikey), in this case I'd configure the item interval as an scheduled one to run everyday at 1 or 2 AM:

DayBeforeCountAlerts.js

try {
    var parameters = JSON.parse(value);
    var req = new CurlHttpRequest();

    var yesterdayStart = new Date();
    yesterdayStart.setHours(0, 0, 0);
    var start  = yesterdayStart.setDate(yesterdayStart.getDate() - 1);

    var yesterdayEnd = new Date();
    yesterdayEnd.setHours(23, 59, 59);
    var end  = yesterdayEnd.setDate(yesterdayEnd.getDate() - 1);

    var jsonZabbix = {
        "jsonrpc": "2.0",
        "method": "event.get",
        "params": {
            "countOutput": true,
            "time_from": start,
            "time_till": end,
        },
        "auth": parameters.apikey,
        "id": 1
    };

    req.AddHeader('Content-Type: application/json');

    resp = req.Post(
        parameters.url,
        JSON.stringify(jsonZabbix)
    );

    if (resp.Status() != 200) {
        throw 'Response code: '+resp.Status();
    }

    var results = JSON.parse(resp);
    return(JSON.stringify(results));

} catch (error) {
    Zabbix.Log(3, "Error 'warning': "+error);
    return "";
}