Zabbix 5 slack webhooks not showing resolved

[Jason]

I've set up slack webhooks and can receive the problems in slack. I foundhttps://www.zabbix.com/forum/zabbix-...799#post422799 which mentions updating the getPermalink function.

When the problem is resolved then the event isn't being updated and in zabbix it's saying Slack notification failed : channel_not_found.

The channel is there though as it's posted to it in the first place. Edited to add contents of script

var SEVERITY_COLORS = [
'#97AAB3', '#7499FF', '#FFC859',
'#FFA059', '#E97659', '#E45959'
];

var RESOLVE_COLOR = '#009900';

var SLACK_MODE_HANDLERS = {
alarm: handlerAlarm,
event: handlerEvent
};


if (!String.prototype.format) {
String.prototype.format = function() {
var args = arguments;

return this.replace(/{(\d+)}/g, function(match, number) {
return number in args
? args[number]
: match
;
});
};
}

function isEventProblem(params) {
return params.event_value == 1
&& params.event_update_status == 0
;
}

function isEventUpdate(params) {
return params.event_value == 1
&& params.event_update_status == 1
;
}

function isEventResolve(params) {
return params.event_value == 0;
}

function getPermalink(channelId, messageTimestamp) {
var req = new CurlHttpRequest();

req.AddHeader('Content-Type: application/x-www-form-urlencoded; charset=utf-8');
req.AddHeader('Authorization: Bearer ' + params.bot_token);

var resp = JSON.parse(
req.Post(Slack.getPermalink + '?channel={0}&message_ts={1}'.format(
channelId,
messageTimestamp
), 'token='+params.bot_token)
);

if (req.Status != 200 && !resp.ok) {
throw resp.error;
}

return resp.permalink;
}

function createProblemURL(zabbix_url, triggerid, eventid, event_source) {
var problem_url = '';
if (event_source === '0') {
problem_url = '{0}/tr_events.php?triggerid={1}&eventid={2}'
.format(
zabbix_url,
triggerid,
eventid
);
}
else {
problem_url = zabbix_url;
}

return problem_url;
}

function getTagValue(event_tags, key) {
var pattern = new RegExp('(' + key + ':.+)');
var tag_value = event_tags
.split(',')
.filter(function (v) {
return v.match(pattern);
})
.map(function (v) {
return v.split(':')[1];
})[0]
|| 0;

return tag_value;
}

function handlerAlarm(params) {
var fields = {
channel: params.channel,
as_user: params.slack_as_user,
};

if (isEventProblem(params)) {
fields.attachments = [
createMessage(
SEVERITY_COLORS[params.event_nseverity] || 0,
params.event_date,
params.event_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source)
)
];

var resp = JSON.parse(req.Post(Slack.postMessage, JSON.stringify(fields)));

if (req.Status != 200 && !resp.ok) {
throw resp.error;
}

result.tags.__message_ts = resp.ts;
result.tags.__channel_id = resp.channel;
result.tags.__channel_name = params.channel;
result.tags.__message_link = getPermalink(resp.channel, resp.ts);
}
else if (isEventUpdate(params)) {
fields.thread_ts = getTagValue(params.event_tags, 'message_ts');
fields.attachments = [
createMessage(
SEVERITY_COLORS[params.event_nseverity] || 0,
params.event_update_date,
params.event_update_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source),
true
)
];

resp = JSON.parse(req.Post(Slack.postMessage, JSON.stringify(fields)));
if (req.Status != 200 && !resp.ok) {
throw resp.error;
}

}
else if (isEventResolve(params)) {
fields.channel = getTagValue(params.event_tags, 'channel_id');
fields.text = '';
fields.ts = getTagValue(params.event_tags, 'message_ts');
fields.attachments = [
createMessage(
RESOLVE_COLOR,
params.event_date,
params.event_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source)
)
];

resp = JSON.parse(req.Post(Slack.chatUpdate, JSON.stringify(fields)));
if (req.Status != 200 && !resp.ok) {
throw resp.error;
}
}
}

function handlerEvent(params) {
var fields = {
channel: params.channel,
as_user: params.slack_as_user
};

if (isEventProblem(params)) {
fields.attachments = [
createMessage(
SEVERITY_COLORS[params.event_nseverity] || 0,
params.event_date,
params.event_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source)
)
];

var resp = JSON.parse(req.Post(Slack.postMessage, JSON.stringify(fields)));

if (req.Status != 200 && !resp.ok) {
throw resp.error;
}

result.tags.__channel_name = params.channel;
result.tags.__message_link = getPermalink(resp.channel, resp.ts);

}
else if (isEventUpdate(params)) {
fields.attachments = [
createMessage(
SEVERITY_COLORS[params.event_nseverity] || 0,
params.event_update_date,
params.event_update_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source),
false
)
];

resp = JSON.parse(req.Post(Slack.postMessage, JSON.stringify(fields)));

if (req.Status != 200 && !resp.ok) {
throw resp.error;
}

}
else if (isEventResolve(params)) {
fields.attachments = [
createMessage(
RESOLVE_COLOR,
params.event_recovery_date,
params.event_recovery_time,
createProblemURL(params.zabbix_url, params.trigger_id, params.event_id, params.event_source)
)
];

resp = JSON.parse(req.Post(Slack.postMessage, JSON.stringify(fields)));

if (req.Status != 200 && !resp.ok) {
throw resp.error;
}
}
}

function createMessage(
event_severity_color,
event_date,
event_time,
problem_url,
isShort,
messageText
) {
var message = {
fallback: params.alert_subject,
title: params.alert_subject,
color: event_severity_color,
title_link: problem_url,
pretext: messageText || '',

fields: [
{
title: 'Host',
value: '{0} [{1}]'.format(params.host_name, params.host_conn),
short: true
},
{
title: 'Event time',
value: '{0} {1}'.format(event_date, event_time),
short: true
}
],
};

if (params.event_source === '0') {
message.fields.push(
{
title: 'Severity',
value: params.event_severity,
short: true
},
{
title: 'Opdata',
value: params.event_opdata,
short: true
}
);
}

if (!isShort && params.event_source === '0') {
message['actions'] = [
{
type: 'button',
text: 'Open in Zabbix',
url: problem_url
}
];

message.fields.push(
{
title: 'Event tags',
value: params.event_tags.replace(/__.+?:(.+?,|.+)/g, '') || 'None',
short: true
},
{
title: 'Trigger description',
value: params.trigger_description,
short: true
}
);
}

if (params.event_source !== '0' || params.event_update_status === '1') {
message.fields.push(
{
title: 'Details',
value: params.alert_message,
short: false
}
);
}

return message;
}

function validateParams(params) {
if (typeof params.bot_token !== 'string' || params.bot_token.trim() === '') {
throw 'Field "bot_token" cannot be empty';
}

if (typeof params.channel !== 'string' || params.channel.trim() === '') {
throw 'Field "channel" cannot be empty';
}

if (isNaN(params.event_id)) {
throw 'Field "event_id" is not a number';
}

if ([0, 1, 2, 3].indexOf(parseInt(params.event_source)) === -1) {
throw 'Incorrect "event_source" parameter given: "' + params.event_source + '".\nMust be 0-3.';
}

if (params.event_source !== '0') {
params.event_nseverity = '0';
params.event_severity = 'Not classified';
params.event_update_status = '0';
params.slack_mode = 'event';
}

if (params.event_source === '1' || params.event_source === '2') {
params.event_value = '1';
}

if (params.event_source === '1') {
params.host_name = params.discovery_host_dns;
params.host_ip = params.discovery_host_ip;
}

if (!~[0, 1, 2, 3, 4, 5].indexOf(parseInt(params.event_nseverity))) {
throw 'Incorrect "event_nseverity" parameter given: ' + params.event_nseverity + '\nMust be 0-5.';
}

if (typeof params.event_severity !== 'string' || params.event_severity.trim() === '') {
throw 'Field "event_severity" cannot be empty';
}

if (params.event_update_status !== '0' && params.event_update_status !== '1') {
throw 'Incorrect "event_update_status" parameter given: ' + params.event_update_status + '\nMust be 0 or 1.';
}

if (params.event_value !== '0' && params.event_value !== '1') {
throw 'Incorrect "event_value" parameter given: ' + params.event_value + '\nMust be 0 or 1.';
}

if (typeof params.host_conn !== 'string' || params.host_conn.trim() === '') {
throw 'Field "host_conn" cannot be empty';
}

if (typeof params.host_name !== 'string' || params.host_name.trim() === '') {
throw 'Field "host_name" cannot be empty';
}

if (!~['true', 'false'].indexOf(params.slack_as_user.toLowerCase())) {
throw 'Incorrect "slack_as_user" parameter given: ' + params.slack_as_user + '\nMust be "true" or "false".';
}

if (!~['alarm', 'event'].indexOf(params.slack_mode)) {
throw 'Incorrect "slack_mode" parameter given: ' + params.slack_mode + '\nMust be "alarm" or "event".';
}

if (isNaN(params.trigger_id) && params.event_source === '0') {
throw 'field "trigger_id" is not a number';
}

if (typeof params.zabbix_url !== 'string' || params.zabbix_url.trim() === '') {
throw 'Field "zabbix_url" cannot be empty';
}

if (!/^(http|https):\/\/.+/.test(params.zabbix_url)) {
throw 'Field "zabbix_url" must contain a schema';
}
}

try {
var params = JSON.parse(value);

validateParams(params);

var req = new CurlHttpRequest(),
result = {tags: {}};

if (typeof params.HTTPProxy === 'string' && params.HTTPProxy.trim() !== '') {
req.SetProxy(params.HTTPProxy);
}

req.AddHeader('Content-Type: application/json; charset=utf-8');
req.AddHeader('Authorization: Bearer ' + params.bot_token);

var slack_endpoint = 'https://slack.com/api/';

var Slack = {
postMessage: slack_endpoint + 'chat.postMessage',
getPermalink: slack_endpoint + 'chat.getPermalink',
chatUpdate: slack_endpoint + 'chat.update'
};

params.slack_mode = params.slack_mode.toLowerCase();
params.slack_mode = params.slack_mode in SLACK_MODE_HANDLERS
? params.slack_mode
: 'alarm';

SLACK_MODE_HANDLERS[params.slack_mode](params);

if (params.event_source === '0') {
return JSON.stringify(result);
}
else {
return 'OK';
}
}
catch (error) {
Zabbix.Log(4, '[ Slack Webhook ] Slack notification failed : ' + error);
throw 'Slack notification failed : ' + error;
}