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package main
import (
"encoding/json"
"flag"
"fmt"
"log"
"os"
"reflect"
"github.com/sgreben/jp/pkg/jp/primitives"
"github.com/sgreben/jp/pkg/terminal"
"github.com/sgreben/jp/pkg/jsonpath"
)
type configuration struct {
Box primitives.Box
X string
Y string
XY string
PlotType enumVar
}
const plotTypeLine = "line"
const plotTypeBar = "bar"
const plotTypeScatter = "scatter"
const plotTypeHist = "hist"
var config = configuration{
PlotType: enumVar{
Value: plotTypeLine,
Choices: []string{
plotTypeLine,
plotTypeBar,
},
},
}
var xPattern *jsonpath.JSONPath
var yPattern *jsonpath.JSONPath
var xyPattern *jsonpath.JSONPath
func init() {
flag.Var(&config.PlotType, "type", fmt.Sprintf("Plot type. One of %v", config.PlotType.Choices))
flag.StringVar(&config.X, "x", "", "x values (JSONPath expression)")
flag.StringVar(&config.Y, "y", "", "y values (JSONPath expression)")
flag.StringVar(&config.XY, "xy", "", "x,y value pairs (JSONPath expression). Overrides -x and -y if given.")
flag.IntVar(&config.Box.Width, "width", 0, "Plot width (default 0 (auto))")
flag.IntVar(&config.Box.Height, "height", 0, "Plot height (default 0 (auto))")
flag.Parse()
log.SetOutput(os.Stderr)
var err error
xPattern = jsonpath.New("x")
err = xPattern.Parse(fmt.Sprintf("{%s}", config.X))
if err != nil {
log.Fatal(err)
}
yPattern = jsonpath.New("y")
err = yPattern.Parse(fmt.Sprintf("{%s}", config.Y))
if err != nil {
log.Fatal(err)
}
if config.XY != "" {
xyPattern = jsonpath.New("xy")
err = xyPattern.Parse(fmt.Sprintf("{%s}", config.XY))
if err != nil {
log.Fatal(err)
}
}
if config.Box.Width == 0 {
config.Box.Width = terminal.Width()
}
if config.Box.Height == 0 {
config.Box.Height = terminal.Height() - 1
}
}
func match(in interface{}, p *jsonpath.JSONPath) [][]reflect.Value {
out, err := p.FindResults(in)
if err != nil {
log.Println(err)
}
return out
}
func main() {
var in interface{}
dec := json.NewDecoder(os.Stdin)
err := dec.Decode(&in)
if err != nil {
log.Println(err)
}
fmt.Println()
var x, y [][]reflect.Value
if xyPattern != nil {
x, y = split(match(in, xyPattern))
} else {
x = match(in, xPattern)
y = match(in, yPattern)
}
switch config.PlotType.Value {
case plotTypeLine:
fmt.Print(linePlot(x, y, config.Box))
case plotTypeBar:
fmt.Print(barPlot(x, y, config.Box))
}
}
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