[v3.2] Add grafana dashboard importing API (#11)

* Add API to import grafana templates to kubesphere dashboard
* Merge and fix the latest codes from kubesphere #2501

Signed-off-by: zhu733756 <talonzhu@yunify.com>

vendor/kubesphere.io/monitoring-dashboard/api/v1alpha2/dashboard_conversion.go

@@ -0,0 +1,224 @@
+/*
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha2
+
+import (
+	"fmt"
+
+	"kubesphere.io/monitoring-dashboard/api/v1alpha1"
+	v1alpha1panels "kubesphere.io/monitoring-dashboard/api/v1alpha1/panels"
+	v1alpha2panels "kubesphere.io/monitoring-dashboard/api/v1alpha2/panels"
+	v1alpha2templatings "kubesphere.io/monitoring-dashboard/api/v1alpha2/templatings"
+	"kubesphere.io/monitoring-dashboard/api/v1alpha2/time"
+	"sigs.k8s.io/controller-runtime/pkg/conversion"
+)
+
+func (_ *Dashboard) Hub() {}
+
+func (src *Dashboard) ConvertTo(dstRaw conversion.Hub) error {
+	dst := dstRaw.(*v1alpha1.Dashboard)
+	dst.ObjectMeta = src.ObjectMeta
+
+	dst.Spec.Title = src.Spec.Title
+	dst.Spec.Description = src.Spec.Description
+	dst.Spec.Time = v1alpha1.Time{
+		From: src.Spec.Time.From,
+		To:   src.Spec.Time.To,
+	}
+	pls := []v1alpha1.Panel{}
+
+	for _, panel := range src.Spec.Panels {
+
+		if panel == nil {
+			continue
+		}
+
+		t := v1alpha1.PanelType(panel.Type)
+		if dst.Spec.DataSource == "" && panel.CommonPanel.Datasource != nil {
+			dst.Spec.DataSource = point2string(panel.CommonPanel.Datasource)
+		}
+
+		dstPanel := v1alpha1.Panel{
+			PanelMeta: v1alpha1.PanelMeta{
+				Title: panel.Title,
+				Id:    panel.Id,
+				Type:  t,
+			},
+		}
+
+		for _, target := range panel.CommonPanel.Targets {
+			dstPanel.Targets = append(dstPanel.Targets, v1alpha1panels.Target{
+				Expression:   target.Expression,
+				LegendFormat: target.LegendFormat,
+				RefID:        target.RefID,
+				Step:         target.Step,
+			})
+		}
+
+		switch t {
+		case "graph":
+
+			if len(panel.CommonPanel.Colors) > 0 {
+				dstPanel.Graph.Colors = panel.CommonPanel.Colors
+			}
+
+			graph := panel.GraphPanel
+
+			if graph != nil {
+
+				yaxes := make([]v1alpha1panels.Yaxis, 0)
+				for _, yaxis := range graph.Yaxes {
+					yaxes = append(yaxes, v1alpha1panels.Yaxis{
+						Decimals: yaxis.Decimals,
+						Format:   yaxis.Format,
+					})
+				}
+				if len(yaxes) > 0 {
+					dstPanel.Graph.Yaxes = yaxes
+				}
+				if panel.CommonPanel.Description != nil {
+					dstPanel.Graph.Description = point2string(panel.CommonPanel.Description)
+				}
+				if graph.Bars {
+					dstPanel.Graph.Bars = graph.Bars
+				}
+				if graph.Lines {
+					dstPanel.Graph.Lines = graph.Lines
+				}
+				if graph.Stack {
+					dstPanel.Graph.Stack = graph.Stack
+				}
+
+			}
+
+		case "singlestat":
+
+			if panel.CommonPanel.Decimals != nil {
+				dstPanel.SingleStat.Decimals = panel.CommonPanel.Decimals
+			}
+
+			if panel.CommonPanel.Format != "" {
+				dstPanel.SingleStat.Format = panel.CommonPanel.Format
+			}
+
+		case "row":
+			// var r v1alpha1panels.Row
+			// dstPanel.Row = &r
+		default:
+			fmt.Println("unhandled panel type: skipped，type:", t)
+		}
+
+		pls = append(pls, dstPanel)
+	}
+
+	dst.Spec.Panels = pls
+
+	for _, temp := range src.Spec.Templatings {
+		dst.Spec.Templatings = append(dst.Spec.Templatings, v1alpha1.Templating{
+			Name:  temp.Name,
+			Query: temp.Query,
+		})
+	}
+
+	return nil
+
+}
+
+func (dst *Dashboard) ConvertFrom(srcRaw conversion.Hub) error {
+	src := srcRaw.(*v1alpha1.Dashboard)
+	dst.ObjectMeta = src.ObjectMeta
+
+	dst.Spec.Title = src.Spec.Title
+	dst.Spec.Description = src.Spec.Description
+	dst.Spec.Time = time.Time{
+		From: src.Spec.Time.From,
+		To:   src.Spec.Time.To,
+	}
+	pls := []*v1alpha2panels.Panel{}
+
+	for _, panel := range src.Spec.Panels {
+
+		t := v1alpha1.PanelType(panel.Type)
+
+		dstPanel := v1alpha2panels.Panel{
+			CommonPanel: v1alpha2panels.CommonPanel{
+				Title:      panel.PanelMeta.Title,
+				Id:         panel.PanelMeta.Id,
+				Type:       string(panel.PanelMeta.Type),
+				Datasource: &src.Spec.DataSource,
+			},
+		}
+
+		for _, target := range panel.Targets {
+			dstPanel.CommonPanel.Targets = append(dstPanel.CommonPanel.Targets, v1alpha2panels.Target{
+				Expression:   target.Expression,
+				LegendFormat: target.LegendFormat,
+				RefID:        target.RefID,
+				Step:         target.Step,
+			})
+		}
+
+		switch t {
+		case "graph":
+			graph := panel.Graph
+			if graph != nil {
+				dstPanel.CommonPanel.Description = &graph.Description
+				yaxes := make([]v1alpha2panels.Axis, 0)
+				for _, yaxis := range graph.Yaxes {
+					yaxes = append(yaxes, v1alpha2panels.Axis{
+						Decimals: yaxis.Decimals,
+						Format:   yaxis.Format,
+					})
+				}
+				dstPanel.GraphPanel.Bars = graph.Bars
+				dstPanel.GraphPanel.Lines = graph.Lines
+				dstPanel.GraphPanel.Stack = graph.Stack
+				dstPanel.GraphPanel.Yaxes = yaxes
+
+			}
+		case "singlestat":
+			singlestat := panel.SingleStat
+			if singlestat != nil {
+				dstPanel.CommonPanel.Decimals = singlestat.Decimals
+				dstPanel.CommonPanel.Format = singlestat.Format
+			}
+
+		case "row":
+			// var r v1alpha2panels.RowPanel
+			// dstPanel.RowPanel = &r
+		default:
+			fmt.Println("unhandled panel type: skipped，type:", t)
+		}
+
+		pls = append(pls, &dstPanel)
+	}
+
+	dst.Spec.Panels = pls
+
+	for _, temp := range src.Spec.Templatings {
+		dst.Spec.Templatings = append(dst.Spec.Templatings, v1alpha2templatings.TemplateVar{
+			Name:  temp.Name,
+			Query: temp.Query,
+		})
+	}
+
+	return nil
+
+}
+
+func point2string(p *string) string {
+	if p == nil {
+		return ""
+	}
+	return *p
+}