Use Data frames response format (#1099)

* Use data frames for numeric data

* Use data frames for text data

* Use data frames for IT services

* fix multiple series

* Convert to the wide format if possible

* Fix table format for text data

* Add refId to the data frames

* Align time series from Zabbix API

* Fill gaps with nulls

* Fix moving average functions

* Option for disabling data alignment

* remove unused logging

* Add labels to data frames

* Detect units

* Set min and max for if percent unit used

* Use value mapping from Zabbix

* Rename unitConverter -> convertZabbixUnit

* More units

* Add missing points in front of each series

* Fix handling table data

* fix db connector data frames handling

* fix it services data frames handling

* Detect all known grafana units

* Chore: remove unused logging

* Fix problems format

* Debug logging: show original units

* Add global option for disabling data alignment

* Add tooltip for the disableDataAlignment feature

* Add note about query options

* Functions for aligning timeseries on the backend

src/datasource-zabbix/zabbix/connectors/dbConnector.js

@@ -134,6 +134,7 @@ function convertGrafanaTSResponse(time_series, items, addHostName) {
       '__zbx_item': { value: item.name },
       '__zbx_item_name': { value: item.name },
       '__zbx_item_key': { value: item.key_ },
+      '__zbx_item_interval': { value: item.delay },
     };
 
     if (_.keys(hosts).length > 0) {
@@ -153,6 +154,7 @@ function convertGrafanaTSResponse(time_series, items, addHostName) {
       target: alias,
       datapoints,
       scopedVars,
+      item
     };
   });
 

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

@@ -161,11 +161,15 @@ export class ZabbixAPIConnector {
   getItems(hostids, appids, itemtype) {
     const params: any = {
       output: [
-        'name', 'key_',
+        'name',
+        'key_',
         'value_type',
         'hostid',
         'status',
-        'state'
+        'state',
+        'units',
+        'valuemapid',
+        'delay'
       ],
       sortfield: 'name',
       webitems: true,
@@ -651,6 +655,15 @@ export class ZabbixAPIConnector {
 
     return this.request('script.execute', params);
   }
+
+  getValueMappings() {
+    const params = {
+      output: 'extend',
+      selectMappings: "extend",
+    };
+
+    return this.request('valuemap.get', params);
+  }
 }
 
 function filterTriggersByAcknowledge(triggers, acknowledged) {

src/datasource-zabbix/zabbix/zabbix.ts

@@ -20,17 +20,17 @@ interface AppsResponse extends Array<any> {
 const REQUESTS_TO_PROXYFY = [
   'getHistory', 'getTrend', 'getGroups', 'getHosts', 'getApps', 'getItems', 'getMacros', 'getItemsByIDs',
   'getEvents', 'getAlerts', 'getHostAlerts', 'getAcknowledges', 'getITService', 'getSLA', 'getVersion', 'getProxies',
-  'getEventAlerts', 'getExtendedEventData', 'getProblems', 'getEventsHistory', 'getTriggersByIds', 'getScripts'
+  'getEventAlerts', 'getExtendedEventData', 'getProblems', 'getEventsHistory', 'getTriggersByIds', 'getScripts', 'getValueMappings'
 ];
 
 const REQUESTS_TO_CACHE = [
-  'getGroups', 'getHosts', 'getApps', 'getItems', 'getMacros', 'getItemsByIDs', 'getITService', 'getProxies'
+  'getGroups', 'getHosts', 'getApps', 'getItems', 'getMacros', 'getItemsByIDs', 'getITService', 'getProxies', 'getValueMappings'
 ];
 
 const REQUESTS_TO_BIND = [
   'getHistory', 'getTrend', 'getMacros', 'getItemsByIDs', 'getEvents', 'getAlerts', 'getHostAlerts',
   'getAcknowledges', 'getITService', 'getVersion', 'acknowledgeEvent', 'getProxies', 'getEventAlerts',
-  'getExtendedEventData', 'getScripts', 'executeScript',
+  'getExtendedEventData', 'getScripts', 'executeScript', 'getValueMappings'
 ];
 
 export class Zabbix implements ZabbixConnector {
@@ -55,6 +55,7 @@ export class Zabbix implements ZabbixConnector {
   getExtendedEventData: (eventids) => Promise<any>;
   getMacros: (hostids: any[]) => Promise<any>;
   getVersion: () => Promise<string>;
+  getValueMappings: () => Promise<any>;
 
   constructor(options) {
     const {