Refactor: zabbix client

pkg/zabbix/settings.go

@@ -0,0 +1,64 @@
+package zabbix
+
+import (
+	"encoding/json"
+	"errors"
+	"strconv"
+	"time"
+
+	"github.com/alexanderzobnin/grafana-zabbix/pkg/gtime"
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+)
+
+func readZabbixSettings(dsInstanceSettings *backend.DataSourceInstanceSettings) (*ZabbixDatasourceSettings, error) {
+	zabbixSettingsDTO := &ZabbixDatasourceSettingsDTO{}
+
+	err := json.Unmarshal(dsInstanceSettings.JSONData, &zabbixSettingsDTO)
+	if err != nil {
+		return nil, err
+	}
+
+	if zabbixSettingsDTO.TrendsFrom == "" {
+		zabbixSettingsDTO.TrendsFrom = "7d"
+	}
+	if zabbixSettingsDTO.TrendsRange == "" {
+		zabbixSettingsDTO.TrendsRange = "4d"
+	}
+	if zabbixSettingsDTO.CacheTTL == "" {
+		zabbixSettingsDTO.CacheTTL = "1h"
+	}
+
+	if zabbixSettingsDTO.Timeout == "" {
+		zabbixSettingsDTO.Timeout = "30"
+	}
+
+	trendsFrom, err := gtime.ParseInterval(zabbixSettingsDTO.TrendsFrom)
+	if err != nil {
+		return nil, err
+	}
+
+	trendsRange, err := gtime.ParseInterval(zabbixSettingsDTO.TrendsRange)
+	if err != nil {
+		return nil, err
+	}
+
+	cacheTTL, err := gtime.ParseInterval(zabbixSettingsDTO.CacheTTL)
+	if err != nil {
+		return nil, err
+	}
+
+	timeout, err := strconv.Atoi(zabbixSettingsDTO.Timeout)
+	if err != nil {
+		return nil, errors.New("failed to parse timeout: " + err.Error())
+	}
+
+	zabbixSettings := &ZabbixDatasourceSettings{
+		Trends:      zabbixSettingsDTO.Trends,
+		TrendsFrom:  trendsFrom,
+		TrendsRange: trendsRange,
+		CacheTTL:    cacheTTL,
+		Timeout:     time.Duration(timeout) * time.Second,
+	}
+
+	return zabbixSettings, nil
+}