mysql-connector: initial ZabbixDBConnector class

src/datasource-zabbix/zabbixDBConnector.js

@@ -0,0 +1,59 @@
+import angular from 'angular';
+import _ from 'lodash';
+
+/** @ngInject */
+function ZabbixDBConnectorFactory(datasourceSrv, backendSrv) {
+
+  class ZabbixDBConnector {
+
+    constructor(sqlDataSourceId) {
+      this.sqlDataSourceId = sqlDataSourceId;
+
+      // Try to load DS with given id to check it's exist
+      this.loadSQLDataSource(sqlDataSourceId);
+    }
+
+    loadSQLDataSource(datasourceId) {
+      let ds = _.find(datasourceSrv.getAll(), {'id': datasourceId});
+      if (ds) {
+        return datasourceSrv.loadDatasource(ds.name)
+        .then(ds => {
+          console.log('SQL data source loaded', ds);
+        });
+      } else {
+        return Promise.reject(`SQL Data Source with ID ${datasourceId} not found`);
+      }
+    }
+
+    invokeSQLQuery(query) {
+      let queryDef = {
+        refId: 'A',
+        format: 'table',
+        datasourceId: this.sqlDataSourceId,
+        rawSql: query
+      };
+
+      return backendSrv.datasourceRequest({
+        url: '/api/tsdb/query',
+        method: 'POST',
+        data: {
+          queries: [queryDef],
+        }
+      })
+      .then(response => {
+        let results = response.data.results;
+        if (results['A']) {
+          return _.head(results['A'].tables);
+        } else {
+          return null;
+        }
+      });
+    }
+  }
+
+  return ZabbixDBConnector;
+}
+
+angular
+  .module('grafana.services')
+  .factory('ZabbixDBConnector', ZabbixDBConnectorFactory);