zabbix_export:
  version: '7.0'
  media_types:
    -
      name: Slack
      type: WEBHOOK
      parameters:
        -
          name: alert_message
          value: '{ALERT.MESSAGE}'
        -
          name: alert_subject
          value: '{ALERT.SUBJECT}'
        -
          name: bot_token
          value: '<PLACE YOUR KEY HERE>'
        -
          name: channel
          value: '{ALERT.SENDTO}'
        -
          name: discovery_host_dns
          value: '{DISCOVERY.DEVICE.DNS}'
        -
          name: discovery_host_ip
          value: '{DISCOVERY.DEVICE.IPADDRESS}'
        -
          name: event_date
          value: '{EVENT.DATE}'
        -
          name: event_id
          value: '{EVENT.ID}'
        -
          name: event_nseverity
          value: '{EVENT.NSEVERITY}'
        -
          name: event_opdata
          value: '{EVENT.OPDATA}'
        -
          name: event_recovery_date
          value: '{EVENT.RECOVERY.DATE}'
        -
          name: event_recovery_time
          value: '{EVENT.RECOVERY.TIME}'
        -
          name: event_severity
          value: '{EVENT.SEVERITY}'
        -
          name: event_source
          value: '{EVENT.SOURCE}'
        -
          name: event_tags
          value: '{EVENT.TAGSJSON}'
        -
          name: event_time
          value: '{EVENT.TIME}'
        -
          name: event_update_date
          value: '{EVENT.UPDATE.DATE}'
        -
          name: event_update_status
          value: '{EVENT.UPDATE.STATUS}'
        -
          name: event_update_time
          value: '{EVENT.UPDATE.TIME}'
        -
          name: event_value
          value: '{EVENT.VALUE}'
        -
          name: host_conn
          value: '{HOST.CONN}'
        -
          name: host_name
          value: '{HOST.NAME}'
        -
          name: slack_as_user
          value: 'true'
        -
          name: slack_mode
          value: alarm
        -
          name: trigger_description
          value: '{TRIGGER.DESCRIPTION}'
        -
          name: trigger_id
          value: '{TRIGGER.ID}'
        -
          name: zabbix_url
          value: '{$ZABBIX.URL}'
      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 HttpRequest();
        
            if (typeof params.HTTPProxy === 'string' && params.HTTPProxy.trim() !== '') {
                req.setProxy(params.HTTPProxy);
            }
        
            req.addHeader('Content-Type: application/x-www-form-urlencoded; charset=utf-8');
            req.addHeader('Authorization: Bearer ' + params.bot_token);
        
            var query = '{0}?channel={1}&message_ts={2}'.format(
                    Slack.getPermalink,
                    encodeURIComponent(channelId),
                    encodeURIComponent(messageTimestamp)),
                resp = JSON.parse(req.get(query));
        
            if (req.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                throw 'message was created, but getting message link was failed with reason "' + 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 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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    throw resp.error;
                }
        
                result.tags = {
                    ['__message_ts_' + params.channel]: resp.ts,
                    ['__channel_id_' + params.channel]: resp.channel,
                    ['__message_link_' + params.channel]: getPermalink(resp.channel, resp.ts),
                };
        
            }
            else if (isEventUpdate(params)) {
                try {
                    var channel_event_tags = JSON.parse(params.event_tags);
                } catch (error) {
                    throw 'Cannot process event tags: ' + error;
                }
        
                if (Array.isArray(channel_event_tags)) {
                    for (i in channel_event_tags) {
                        if (channel_event_tags[i].tag.includes('__message_ts_' + params.channel)) {
                            fields.thread_ts = channel_event_tags[i].value;
                            break;
                        }
                    }
                }
        
                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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    throw resp.error;
                }
        
            }
            else if (isEventResolve(params)) {
        
                fields.text = '';
        
                try {
                    var channel_event_tags = JSON.parse(params.event_tags);
                } catch (error) {
                    throw 'Cannot process event tags: ' + error;
                }
        
                if (Array.isArray(channel_event_tags)) {
                    for (i in channel_event_tags) {
                        if (channel_event_tags[i].tag.includes('__channel_id_' + params.channel)) {
                            fields.channel = channel_event_tags[i].value;
                            continue;
                        }
                        if (channel_event_tags[i].tag.includes('__message_ts_' + params.channel)) {
                            fields.ts = channel_event_tags[i].value;
                        }
                    }
                }
        
                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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    throw resp.error;
                }
        
                result.tags = {
                    ['__message_link_' + params.channel]: 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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    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.getStatus() != 200 || !resp.ok || resp.ok === 'false') {
                    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: JSON.parse(params.event_tags).filter(function (e) { return !e.tag.includes('__') }).map(function (e) { return e.tag + ': ' + e.value }).join('\n') || '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 HttpRequest(),
                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;
        }
      process_tags: 'YES'
      message_templates:
        -
          event_source: TRIGGERS
          operation_mode: PROBLEM
          subject: 'Problem: {EVENT.NAME}'
          message: |
            Problem started at {EVENT.TIME} on {EVENT.DATE}
            Problem name: {EVENT.NAME}
            Host: {HOST.NAME}
            Severity: {EVENT.SEVERITY}
            Operational data: {EVENT.OPDATA}
            Original problem ID: {EVENT.ID}
            {TRIGGER.URL}
        -
          event_source: TRIGGERS
          operation_mode: RECOVERY
          subject: 'Resolved in {EVENT.DURATION}: {EVENT.NAME}'
          message: |
            Problem has been resolved at {EVENT.RECOVERY.TIME} on {EVENT.RECOVERY.DATE}
            Problem name: {EVENT.NAME}
            Problem duration: {EVENT.DURATION}
            Host: {HOST.NAME}
            Severity: {EVENT.SEVERITY}
            Original problem ID: {EVENT.ID}
            {TRIGGER.URL}
        -
          event_source: TRIGGERS
          operation_mode: UPDATE
          subject: 'Updated problem in {EVENT.AGE}: {EVENT.NAME}'
          message: |
            {USER.FULLNAME} {EVENT.UPDATE.ACTION} problem at {EVENT.UPDATE.DATE} {EVENT.UPDATE.TIME}.
            {EVENT.UPDATE.MESSAGE}
            
            Current problem status is {EVENT.STATUS}, age is {EVENT.AGE}, acknowledged: {EVENT.ACK.STATUS}.
        -
          event_source: DISCOVERY
          operation_mode: PROBLEM
          subject: 'Discovery: {DISCOVERY.DEVICE.STATUS} {DISCOVERY.DEVICE.IPADDRESS}'
          message: |
            Discovery rule: {DISCOVERY.RULE.NAME}
            
            Device IP: {DISCOVERY.DEVICE.IPADDRESS}
            Device DNS: {DISCOVERY.DEVICE.DNS}
            Device status: {DISCOVERY.DEVICE.STATUS}
            Device uptime: {DISCOVERY.DEVICE.UPTIME}
            
            Device service name: {DISCOVERY.SERVICE.NAME}
            Device service port: {DISCOVERY.SERVICE.PORT}
            Device service status: {DISCOVERY.SERVICE.STATUS}
            Device service uptime: {DISCOVERY.SERVICE.UPTIME}
        -
          event_source: AUTOREGISTRATION
          operation_mode: PROBLEM
          subject: 'Autoregistration: {HOST.HOST}'
          message: |
            Host name: {HOST.HOST}
            Host IP: {HOST.IP}
            Agent port: {HOST.PORT}