feat: display the merit profiles as ASCII art

cmd/root.go

@@ -175,8 +175,13 @@ multiply them beforehand by a big factor like 1 000 000 000.
 			os.Exit(3)
 		}
 
+		desiredWidth, widthErr := strconv.Atoi(cmd.Flags().Lookup("width").Value.String())
+		if widthErr != nil || desiredWidth < 0 {
+			desiredWidth = 79
+		}
 		options := &formatter.Options{
 			Sorted: bool(cmd.Flags().Lookup("sort").Changed),
+			Width:  desiredWidth,
 		}
 
 		out, formatterErr := outputFormatter.Format(
@@ -233,6 +238,7 @@ func init() {
 	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.majority-judgment-cli.yaml)")
 	//rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")
 	rootCmd.Flags().StringP("format", "f", "text", "desired format of the output")
+	rootCmd.Flags().StringP("width", "w", "79", "desired width, in characters")
 	//rootCmd.PersistentFlags().StringVarP(&userLicense, "license", "l", "", "name of license for the project")
 	//rootCmd.PersistentFlags().Bool("viper", true, "use Viper for configuration")
 

formatter/formatter.go

@@ -4,6 +4,7 @@ import "github.com/mieuxvoter/majority-judgment-library-go/judgment"
 
 type Options struct {
 	Sorted bool
+	Width  int
 }
 
 type Formatter interface {

formatter/text.go

@@ -3,6 +3,7 @@ package formatter
 import (
 	"fmt"
 	"github.com/mieuxvoter/majority-judgment-library-go/judgment"
+	"math"
 	"strconv"
 	"strings"
 )
@@ -18,6 +19,11 @@ func (t *TextFormatter) Format(
 ) (string, error) {
 	out := ""
 
+	expectedWidth := options.Width
+	if 0 >= expectedWidth {
+		expectedWidth = 79
+	}
+
 	proposalsResults := result.Proposals
 	if options.Sorted {
 		proposalsResults = result.ProposalsSorted
@@ -44,17 +50,25 @@ func (t *TextFormatter) Format(
 	}
 
 	for _, proposalResult := range proposalsResults {
-		out += fmt.Sprintf(
+		line := ""
+		line += fmt.Sprintf(
 			"#%0"+strconv.Itoa(amountOfDigitsForRank)+"d  ",
 			proposalResult.Rank,
 		)
-		out += fmt.Sprintf(
-			" %*s",
+		line += fmt.Sprintf(
+			" %*s ",
 			amountOfCharactersForProposal,
 			proposals[proposalResult.Index],
 		)
 
-		out += "\n"
+		remainingWidth := expectedWidth - len(line)
+
+		line += makeAsciiMeritProfile(
+			pollTally.Proposals[proposalResult.Index],
+			remainingWidth,
+		)
+
+		out += line + "\n"
 	}
 
 	return strings.TrimSpace(out), nil
@@ -68,3 +82,39 @@ func countDigits(i int) (count int) {
 
 	return
 }
+
+func makeAsciiMeritProfile(
+	tally *judgment.ProposalTally,
+	width int,
+) (ascii string) {
+	if width < 3 {
+		width = 3
+	}
+	amountOfJudges := float64(tally.CountJudgments())
+	for gradeIndex, gradeTallyInt := range tally.Tally {
+		gradeTally := float64(gradeTallyInt)
+		gradeRune := strconv.Itoa(gradeIndex)
+		ascii += strings.Repeat(
+			gradeRune,
+			int(math.Round(float64(width)*gradeTally/amountOfJudges)),
+		)
+	}
+
+	for len(ascii) < width {
+		ascii += ascii[len(ascii)-1:]
+	}
+
+	for len(ascii) > width {
+		ascii = ascii[0 : len(ascii)-1]
+	}
+
+	ascii = replaceAtIndex(ascii, '|', width/2)
+
+	return
+}
+
+func replaceAtIndex(in string, r rune, i int) string {
+	out := []rune(in)
+	out[i] = r
+	return string(out)
+}