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api.go
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api.go
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// Copyright ©2018 The go-hep Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package rsrv
import (
"encoding/json"
"image/color"
"math"
"strings"
"go-hep.org/x/hep/groot/rsrv/internal/hexcolor"
"gonum.org/v1/plot/vg"
"gonum.org/v1/plot/vg/vgimg"
)
// OpenFileRequest describes a request to open a file located at the
// provided URI.
type OpenFileRequest struct {
URI string `json:"uri"`
}
type CloseFileRequest struct {
URI string `json:"uri"`
}
type File struct {
URI string `json:"uri"`
Version int `json:"version"`
}
type ListResponse struct {
Files []File `json:"files"`
}
type DirentRequest struct {
URI string `json:"uri"`
Dir string `json:"dir,omitempty"`
Recursive bool `json:"recursive,omitempty"`
}
type DirentResponse struct {
URI string `json:"uri"`
Content []Dirent `json:"content,omitempty"`
}
type Dirent struct {
Path string `json:"path"`
Type string `json:"type"`
Name string `json:"name"`
Title string `json:"title,omitempty"`
Cycle int `json:"cycle"`
}
type Tree struct {
Type string `json:"type"`
Name string `json:"name"`
Title string `json:"title"`
Entries int64 `json:"entries"`
Branches []Branch `json:"branches"`
Leaves []Leaf `json:"leaves"`
}
type Branch struct {
Type string `json:"type"`
Name string `json:"name"`
Branches []Branch `json:"branches"`
Leaves []Leaf `json:"leaves"`
}
type Leaf struct {
Type string `json:"type"`
Name string `json:"name"`
}
type TreeRequest struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
}
type TreeResponse struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Tree Tree `json:"tree"`
}
type PlotH1Request struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Options PlotOptions `json:"options"`
}
type PlotH2Request struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Options PlotOptions `json:"options"`
}
type PlotS2Request struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Options PlotOptions `json:"options"`
}
type PlotTreeRequest struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Vars []string `json:"vars"`
Options PlotOptions `json:"options"`
}
type PlotResponse struct {
URI string `json:"uri"`
Dir string `json:"dir"`
Obj string `json:"obj"`
Data string `json:"data"`
}
type PlotOptions struct {
Title string `json:"title,omitempty"`
X string `json:"x,omitempty"`
Y string `json:"y,omitempty"`
Type string `json:"type"`
Width vg.Length `json:"width"`
Height vg.Length `json:"height"`
Line LineStyle `json:"line,omitempty"`
FillColor color.Color `json:"fill_color,omitempty"`
}
func (opt *PlotOptions) init() {
if opt.Type == "" {
opt.Type = "png"
}
opt.Type = strings.ToLower(opt.Type)
switch {
case opt.Width <= 0 && opt.Height <= 0:
opt.Width = vgimg.DefaultWidth
opt.Height = vgimg.DefaultWidth / math.Phi
case opt.Width <= 0:
opt.Width = opt.Height * math.Phi
case opt.Height <= 0:
opt.Height = opt.Width / math.Phi
}
opt.Line.init()
if opt.FillColor == nil {
opt.FillColor = color.Transparent
}
}
func (opt PlotOptions) MarshalJSON() ([]byte, error) {
if opt.FillColor == nil {
opt.FillColor = color.Transparent
}
raw := jsonPlotOptions{
Title: opt.Title,
X: opt.X,
Y: opt.Y,
Type: opt.Type,
Width: opt.Width,
Height: opt.Height,
Line: opt.Line.toJSON(),
FillColor: hexcolor.HexModel.Convert(opt.FillColor).(hexcolor.Hex),
}
return json.Marshal(raw)
}
func (opt *PlotOptions) UnmarshalJSON(p []byte) error {
var raw jsonPlotOptions
err := json.Unmarshal(p, &raw)
if err != nil {
return err
}
opt.Title = raw.Title
opt.X = raw.X
opt.Y = raw.Y
opt.Type = raw.Type
opt.Width = raw.Width
opt.Height = raw.Height
opt.Line = raw.Line.fromJSON()
opt.FillColor = raw.FillColor
return nil
}
type LineStyle struct {
Color color.Color `json:"color,omitempty"`
Width vg.Length `json:"width,omitempty"`
Dashes []vg.Length `json:"dashes,omitempty"`
DashOff vg.Length `json:"dash_offset,omitempty"`
}
func (sty *LineStyle) init() {
if sty.Color == nil {
sty.Color = color.RGBA{255, 0, 0, 255}
}
}
type jsonPlotOptions struct {
Title string `json:"title,omitempty"`
X string `json:"x,omitempty"`
Y string `json:"y,omitempty"`
Type string `json:"type"`
Width vg.Length `json:"width"`
Height vg.Length `json:"height"`
Line jsonLineStyle `json:"line,omitempty"`
FillColor hexcolor.Hex `json:"fill_color,omitempty"`
}
type jsonLineStyle struct {
Color hexcolor.Hex `json:"color,omitempty"`
Width vg.Length `json:"width,omitempty"`
Dashes []vg.Length `json:"dashes,omitempty"`
DashOff vg.Length `json:"dash_offset,omitempty"`
}
func (sty jsonLineStyle) fromJSON() LineStyle {
return LineStyle{
Color: sty.Color,
Width: sty.Width,
Dashes: sty.Dashes,
DashOff: sty.DashOff,
}
}
func (sty LineStyle) toJSON() jsonLineStyle {
if sty.Color == nil {
sty.Color = defaultLineColor
}
o := jsonLineStyle{
Width: sty.Width,
Dashes: sty.Dashes,
DashOff: sty.DashOff,
Color: hexcolor.HexModel.Convert(sty.Color).(hexcolor.Hex),
}
return o
}
var (
defaultLineColor = color.RGBA{R: 255, A: 255}
)