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package bookpipeline
import (
"fmt"
"io"
"path/filepath"
"sort"
"strconv"
"strings"
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-chart/drawing"
)
const maxticks = 40
const goodCutoff = 70
const mediumCutoff = 65
const badCutoff = 60
type Conf struct {
Path, Code string
Conf float64
}
type GraphConf struct {
Pgnum, Conf float64
}
func createLine(xvalues []float64, y float64, c drawing.Color) chart.ContinuousSeries {
var yvalues []float64
for range xvalues {
yvalues = append(yvalues, y)
}
return chart.ContinuousSeries{
XValues: xvalues,
YValues: yvalues,
Style: chart.Style{
StrokeColor: c,
},
}
}
func Graph(confs map[string]*Conf, bookname string, w io.Writer) error {
// Organise confs to sort them by page
var graphconf []GraphConf
for _, conf := range confs {
name := filepath.Base(conf.Path)
var numend int
numend = strings.Index(name, "_")
if numend == -1 {
numend = strings.Index(name, ".")
}
pgnum, err := strconv.ParseFloat(name[0:numend], 64)
if err != nil {
continue
}
var c GraphConf
c.Pgnum = pgnum
c.Conf = conf.Conf
graphconf = append(graphconf, c)
}
sort.Slice(graphconf, func(i, j int) bool { return graphconf[i].Pgnum < graphconf[j].Pgnum })
// Create main xvalues and yvalues, annotations and ticks
var xvalues, yvalues []float64
var annotations []chart.Value2
var ticks []chart.Tick
tickevery := len(graphconf) / maxticks
if tickevery < 1 {
tickevery = 1
}
for i, c := range graphconf {
xvalues = append(xvalues, c.Pgnum)
yvalues = append(yvalues, c.Conf)
if c.Conf < goodCutoff {
annotations = append(annotations, chart.Value2{Label: fmt.Sprintf("%.0f", c.Pgnum), XValue: c.Pgnum, YValue: c.Conf})
}
if i%tickevery == 0 {
ticks = append(ticks, chart.Tick{c.Pgnum, fmt.Sprintf("%.0f", c.Pgnum)})
}
}
// make last tick the final page
final := graphconf[len(graphconf)-1]
ticks[len(ticks)-1] = chart.Tick{final.Pgnum, fmt.Sprintf("%.0f", final.Pgnum)}
mainSeries := chart.ContinuousSeries{
XValues: xvalues,
YValues: yvalues,
}
// Create lines
goodCutoffSeries := createLine(xvalues, goodCutoff, chart.ColorAlternateGreen)
mediumCutoffSeries := createLine(xvalues, mediumCutoff, chart.ColorOrange)
badCutoffSeries := createLine(xvalues, badCutoff, chart.ColorRed)
// Create lines marking top and bottom 10% confidence
sort.Slice(graphconf, func(i, j int) bool { return graphconf[i].Conf < graphconf[j].Conf })
lowconf := graphconf[int(len(graphconf)/10)].Conf
highconf := graphconf[int((len(graphconf)/10)*9)].Conf
yvalues = []float64{}
for range graphconf {
yvalues = append(yvalues, lowconf)
}
minSeries := &chart.ContinuousSeries{
Style: chart.Style{
StrokeColor: chart.ColorAlternateGray,
StrokeDashArray: []float64{5.0, 5.0},
},
XValues: xvalues,
YValues: yvalues,
}
yvalues = []float64{}
for _ = range graphconf {
yvalues = append(yvalues, highconf)
}
maxSeries := &chart.ContinuousSeries{
Style: chart.Style{
StrokeColor: chart.ColorAlternateGray,
StrokeDashArray: []float64{5.0, 5.0},
},
XValues: xvalues,
YValues: yvalues,
}
graph := chart.Chart{
Title: bookname,
Width: 3840,
Height: 2160,
XAxis: chart.XAxis{
Name: "Page number",
Range: &chart.ContinuousRange{
Min: 0.0,
},
Ticks: ticks,
},
YAxis: chart.YAxis{
Name: "Confidence",
Range: &chart.ContinuousRange{
Min: 0.0,
Max: 100.0,
},
},
Series: []chart.Series{
mainSeries,
minSeries,
maxSeries,
goodCutoffSeries,
mediumCutoffSeries,
badCutoffSeries,
chart.AnnotationSeries{
Annotations: annotations,
},
},
}
return graph.Render(chart.PNG, w)
}
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