/
encoder.go
163 lines (132 loc) · 3.84 KB
/
encoder.go
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package golang
import (
"bytes"
"github.com/K-Phoen/jennifer/jen"
"github.com/K-Phoen/sdk"
"go.uber.org/zap"
)
const packageImportPath = "github.com/K-Phoen/grabana"
const sdkImportPath = "github.com/K-Phoen/sdk"
type Encoder struct {
logger *zap.Logger
}
func NewEncoder(logger *zap.Logger) *Encoder {
return &Encoder{
logger: logger,
}
}
func (encoder *Encoder) EncodeDashboard(dashboard sdk.Board) (string, error) {
dashboardStatements := []jen.Code{
lit(dashboard.Title),
}
// TODO: links, annotations
dashboardStatements = append(dashboardStatements, encoder.encodeGeneralSettings(dashboard)...)
dashboardStatements = append(dashboardStatements, encoder.encodeVariables(dashboard.Templating.List)...)
dashboardStatements = append(dashboardStatements, encoder.encodePanels(dashboard)...)
file := jen.NewFile("main")
file.Func().Id("main").Params().Block(
jen.Id("builder, err").Op(":=").Qual(packageImportPath+"/dashboard", "New").MultiLineCall(
dashboardStatements...,
),
)
buffer := &bytes.Buffer{}
if err := file.Render(buffer); err != nil {
return "", err
}
return buffer.String(), nil
}
func (encoder *Encoder) encodeGeneralSettings(dashboard sdk.Board) []jen.Code {
var settings []jen.Code
if dashboard.UID != "" {
settings = append(settings, dashboardQual("UID").Call(lit(dashboard.UID)))
}
if dashboard.Slug != "" {
settings = append(settings, dashboardQual("Slug").Call(lit(dashboard.Slug)))
}
if dashboard.SharedCrosshair {
settings = append(settings, dashboardQual("SharedCrossHair").Call())
}
if !dashboard.Editable {
settings = append(settings, dashboardQual("ReadOnly").Call())
}
if dashboard.Refresh != nil && dashboard.Refresh.Value != "" {
settings = append(settings, dashboardQual("AutoRefresh").Call(lit(dashboard.Refresh.Value)))
}
if len(dashboard.Tags) != 0 {
tagsLiterals := Map(dashboard.Tags, func(item string) jen.Code {
return lit(item)
})
settings = append(settings, dashboardQual("Tags").Call(jen.List(tagsLiterals...)))
}
// TODO: timezone
settings = append(
settings,
dashboardQual("Time").Call(
lit(dashboard.Time.From),
lit(dashboard.Time.To),
),
)
return settings
}
func (encoder *Encoder) encodePanels(dashboard sdk.Board) []jen.Code {
var currentRow *RowIR
var convertedRows []jen.Code
for _, panel := range dashboard.Panels {
if panel.Type == "row" {
if currentRow != nil {
convertedRows = append(convertedRows, encoder.encodeRow(*currentRow))
}
currentRow = &RowIR{
Title: panel.Title,
RepeatFor: panel.Repeat,
}
if panel.RowPanel != nil && panel.RowPanel.Collapsed {
currentRow.Collapsed = true
}
continue
}
if currentRow == nil {
currentRow = &RowIR{
Title: "Overview",
}
}
convertedPanel, ok := encoder.encodeDataPanel(*panel)
if ok {
currentRow.Panels = append(currentRow.Panels, convertedPanel)
}
}
if currentRow != nil {
convertedRows = append(convertedRows, encoder.encodeRow(*currentRow))
}
return convertedRows
}
func (encoder *Encoder) encodeDataPanel(panel sdk.Panel) (jen.Code, bool) {
switch panel.Type {
case "logs":
return encoder.convertLogs(panel), true
case "timeseries":
return encoder.encodeTimeseries(panel), true
case "graph":
return encoder.encodeGraph(panel), true
case "gauge":
return encoder.encodeGauge(panel), true
case "stat":
return encoder.encodeStat(panel), true
case "text":
return encoder.encodeText(panel), true
case "heatmap":
return encoder.encodeHeatmap(panel), true
/*
case "singlestat":
return encoder.encodeSingleStat(panel), true
case "table":
return encoder.encodeTable(panel), true
*/
default:
encoder.logger.Warn("unhandled panel type: skipped", zap.String("type", panel.Type), zap.String("title", panel.Title))
}
return nil, false
}
func dashboardQual(name string) *jen.Statement {
return qual("dashboard", name)
}