bar_chart.gno

 1package charts
 2
 3import (
 4	"strings"
 5
 6	"gno.land/p/nt/ufmt"
 7)
 8
 9// GenerateBarChart creates an ASCII bar chart in markdown format
10// values: slice of float values to chart
11// labels: slice of labels for each bar
12// maxWidth: maximum width of bars in characters
13// title: chart title
14// Returns a markdown string representing the chart
15func GenerateBarChart(values []float64, labels []string, maxWidth int, title string) string {
16	if len(values) == 0 || len(labels) == 0 || len(values) != len(labels) {
17		return "invalid data for display"
18	}
19
20	if maxWidth <= 0 {
21		return "maxWidth must be greater than 0"
22	}
23
24	maxVal := findMaxValue(values)
25
26	maxLabelLength := 0
27	for _, label := range labels {
28		if len(label) > maxLabelLength {
29			maxLabelLength = len(label)
30		}
31	}
32
33	scale := float64(maxWidth) / maxVal
34
35	output := formatChartHeader(title)
36	output += "\n```\n"
37
38	for i, value := range values {
39		padding := strings.Repeat(" ", maxLabelLength-len(labels[i]))
40		output += labels[i] + padding + "    "
41
42		barLength := int(value * scale)
43		output += strings.Repeat("█", barLength)
44
45		output += " " + ufmt.Sprintf("%.2f", value)
46		output += "\n"
47	}
48
49	output += "```\n"
50	return output
51}