package bookpipeline import ( "errors" "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 { if len(confs) == 0 { return errors.New("No valid confidences") } // 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) } // If we failed to get any page numbers, just fake the lot if len(graphconf) == 0 { i := float64(1) for _, conf := range confs { var c GraphConf c.Pgnum = i c.Conf = conf.Conf graphconf = append(graphconf, c) i++ } } sort.Slice(graphconf, func(i, j int) bool { return graphconf[i].Pgnum < graphconf[j].Pgnum }) // Create main xvalues, yvalues ticks var xvalues, yvalues []float64 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 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, } // Create annotations var annotations []chart.Value2 for _, c := range graphconf { if c.Conf > highconf || c.Conf < lowconf { annotations = append(annotations, chart.Value2{Label: fmt.Sprintf("%.0f", c.Pgnum), XValue: c.Pgnum, YValue: c.Conf}) } } annotations = append(annotations, chart.Value2{Label: fmt.Sprintf("%.0f", lowconf), XValue: xvalues[len(xvalues)-1], YValue: lowconf}) annotations = append(annotations, chart.Value2{Label: fmt.Sprintf("%.0f", highconf), XValue: xvalues[len(xvalues)-1], YValue: highconf}) 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) }