always return array from problems requests

src/datasource-zabbix/problemsHandler.ts

@@ -5,6 +5,7 @@ import { ZBXProblem, ZBXTrigger, ProblemDTO, ZBXEvent } from './types';
 
 export function joinTriggersWithProblems(problems: ZBXProblem[], triggers: ZBXTrigger[]): ProblemDTO[] {
   const problemDTOList: ProblemDTO[] = [];
+
   for (let i = 0; i < problems.length; i++) {
     const p = problems[i];
     const triggerId = Number(p.objectid);
@@ -52,8 +53,8 @@ interface JoinOptions {
 
 export function joinTriggersWithEvents(events: ZBXEvent[], triggers: ZBXTrigger[], options?: JoinOptions): ProblemDTO[] {
   const { valueFromEvent } = options;
-
   const problemDTOList: ProblemDTO[] = [];
+
   for (let i = 0; i < events.length; i++) {
     const e = events[i];
     const triggerId = Number(e.objectid);

src/datasource-zabbix/utils.ts

@@ -380,3 +380,7 @@ export function parseTags(tagStr: string): any[] {
   });
   return tags;
 }
+
+export function mustArray(result: any): any[] {
+  return result || [];
+}

src/datasource-zabbix/zabbix/connectors/zabbix_api/zabbixAPIConnector.ts

@@ -425,7 +425,7 @@ export class ZabbixAPIConnector {
       params.time_till = timeTo;
     }
 
-    return this.request('problem.get', params);
+    return this.request('problem.get', params).then(utils.mustArray);
   }
 
   getTriggersByIds(triggerids: string[]) {
@@ -445,7 +445,7 @@ export class ZabbixAPIConnector {
       preservekeys: '1',
     };
 
-    return this.request('trigger.get', params);
+    return this.request('trigger.get', params).then(utils.mustArray);
   }
 
   getTriggers(groupids, hostids, applicationids, options) {
@@ -507,7 +507,7 @@ export class ZabbixAPIConnector {
       params.sortorder = 'DESC';
     }
 
-    return this.request('event.get', params);
+    return this.request('event.get', params).then(utils.mustArray);
   }
 
   getEventsHistory(groupids, hostids, applicationids, options) {
@@ -543,7 +543,7 @@ export class ZabbixAPIConnector {
       params.value = value;
     }
 
-    return this.request('event.get', params);
+    return this.request('event.get', params).then(utils.mustArray);
   }
 
   getExtendedEventData(eventids) {

src/datasource-zabbix/zabbix/zabbix.ts

@@ -340,7 +340,10 @@ export class Zabbix implements ZabbixConnector {
     .then(query => this.zabbixAPI.getProblems(query.groupids, query.hostids, query.applicationids, options))
     .then(problems => {
       const triggerids = problems?.map(problem => problem.objectid);
-      return Promise.all([Promise.resolve(problems), this.zabbixAPI.getTriggersByIds(triggerids)]);
+      return Promise.all([
+        Promise.resolve(problems),
+        this.zabbixAPI.getTriggersByIds(triggerids)
+      ]);
     })
     .then(([problems, triggers]) => joinTriggersWithProblems(problems, triggers))
     .then(triggers => this.filterTriggersByProxy(triggers, proxyFilter))