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package main
import (
"encoding/csv"
"encoding/json"
"flag"
"fmt"
"log"
"os"
"reflect"
"github.com/sgreben/jp/pkg/draw"
"github.com/sgreben/jp/pkg/terminal"
"github.com/sgreben/jp/pkg/jsonpath"
)
type configuration struct {
Box draw.Box
X string
Y string
XY string
PlotType enumVar
CanvasType enumVar
InputType enumVar
HistBins uint
}
const (
plotTypeLine = "line"
plotTypeBar = "bar"
plotTypeScatter = "scatter"
plotTypeHist = "hist"
plotTypeHist2D = "hist2d"
)
const (
canvasTypeFull = "full"
canvasTypeFullEscape = "full-escape"
canvasTypeFullEscapeBW = "full-bw"
canvasTypeFullEscapeWB = "full-wb"
canvasTypeQuarter = "quarter"
canvasTypeBraille = "braille"
canvasTypeAuto = "auto"
)
const (
inputTypeCSV = "csv"
inputTypeJSON = "json"
)
var config = configuration{
PlotType: enumVar{
Value: plotTypeLine,
Choices: []string{
plotTypeLine,
plotTypeBar,
plotTypeScatter,
plotTypeHist,
plotTypeHist2D,
},
},
CanvasType: enumVar{
Value: canvasTypeAuto,
Choices: []string{
canvasTypeFull,
canvasTypeFullEscape,
canvasTypeFullEscapeBW,
canvasTypeFullEscapeWB,
canvasTypeQuarter,
canvasTypeBraille,
canvasTypeAuto,
},
},
InputType: enumVar{
Value: inputTypeJSON,
Choices: []string{
inputTypeJSON,
inputTypeCSV,
},
},
}
var (
xPattern *jsonpath.JSONPath
yPattern *jsonpath.JSONPath
xyPattern *jsonpath.JSONPath
)
func init() {
flag.Var(&config.PlotType, "type", fmt.Sprintf("Plot type. One of %v", config.PlotType.Choices))
flag.Var(&config.CanvasType, "canvas", fmt.Sprintf("Canvas type. One of %v", config.CanvasType.Choices))
flag.Var(&config.InputType, "input", fmt.Sprintf("Input type. One of %v", config.InputType.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.UintVar(&config.HistBins, "bins", 0, "Number of histogram bins (default 0 (auto))")
flag.Parse()
log.SetOutput(os.Stderr)
log.SetFlags(log.LstdFlags | log.Lshortfile)
var err error
xPattern = jsonpath.New("x")
xPattern.AllowMissingKeys(true)
err = xPattern.Parse(fmt.Sprintf("{%s}", config.X))
if err != nil {
log.Fatal(err)
}
yPattern = jsonpath.New("y")
yPattern.AllowMissingKeys(true)
err = yPattern.Parse(fmt.Sprintf("{%s}", config.Y))
if err != nil {
log.Fatal(err)
}
if config.XY != "" || (config.X == "" && config.Y == "") {
xyPattern = jsonpath.New("xy")
xyPattern.AllowMissingKeys(true)
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
}
if config.CanvasType.Value == canvasTypeAuto {
config.CanvasType.Value = autoCanvas[config.PlotType.Value]
}
}
func match(in interface{}, p *jsonpath.JSONPath) [][]reflect.Value {
defer func() {
if r := recover(); r != nil {
log.Println("error evaluating JSONPath", p.String+":", r)
}
}()
out, err := p.FindResults(in)
if err != nil {
log.Println(err)
}
return out
}
func main() {
var in interface{}
switch config.InputType.Value {
case inputTypeJSON:
dec := json.NewDecoder(os.Stdin)
err := dec.Decode(&in)
if err != nil {
log.Println(inputTypeJSON, "input:", err)
}
case inputTypeCSV:
r := csv.NewReader(os.Stdin)
rows, err := r.ReadAll()
if err != nil {
log.Println(inputTypeCSV, "input:", err)
}
in = parseRows(rows)
}
var x, y []reflect.Value
if xyPattern != nil {
x, y = split(match(in, xyPattern))
} else {
x = flatten(match(in, xPattern))
y = flatten(match(in, yPattern))
}
buffer := draw.NewBuffer(config.Box)
var p draw.Pixels
switch config.CanvasType.Value {
case canvasTypeBraille:
p = &draw.Braille{Buffer: buffer}
case canvasTypeQuarter:
p = &draw.Quarter{Buffer: buffer}
case canvasTypeFull:
p = &draw.Full{Buffer: buffer}
case canvasTypeFullEscape, canvasTypeFullEscapeWB, canvasTypeFullEscapeBW:
p = &draw.Full{Buffer: buffer}
}
p.Clear()
c := draw.Canvas{Pixels: p}
var out string
switch config.PlotType.Value {
case plotTypeLine:
out = linePlot(x, y, c)
case plotTypeScatter:
out = scatterPlot(x, y, c)
case plotTypeBar:
out = barPlot(x, y, c)
case plotTypeHist:
out = histogram(x, c, config.HistBins)
case plotTypeHist2D:
out = hist2D(x, y, c, config.HistBins)
}
switch config.CanvasType.Value {
case canvasTypeFullEscape:
out = draw.FullEscape(out)
case canvasTypeFullEscapeBW:
out = draw.FullEscapeBW(out)
case canvasTypeFullEscapeWB:
out = draw.FullEscapeWB(out)
}
fmt.Println(out)
}
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