Code100Puzzle - Code Block

main.go

package main

import (
	"encoding/json"
	"fmt"
	"strings"
)

type CodeCompetition struct {
	Columns int    `json:"columns"`
	PadChar string `json:"padChar"`
	Events  []struct {
		Name     string `json:"name"`
		Location string `json:"location,omitempty"`
		Date     string `json:"date"`
	} `json:"events"`
}

func main() {
	input := `{
    "columns": 80,
    "padChar": "·",
    "events": [
        { "name": "Code 100", "location": "Zagreb, Croatia", "date": "29.11.2023" },
        { "name": "LIVE", "date": "ongoing" },
        { "name": "Coffee With Developers", "location": "various", "date": "ongoing"} ,
        { "name": "World Congress","location": "Berlin, Germany", "date":"17-19.07.2024" }
    ]
}`
	a := new(CodeCompetition)
	err := json.Unmarshal([]byte(input), a)
	if err != nil {
		fmt.Println(err)
		return
	}

	dottedString := strings.Repeat(a.PadChar, a.Columns)
	output := dottedString + "\n"

	for _, event := range a.Events {
		strRune := []rune(dottedString)

		if event.Name != "" {
			name := fmt.Sprintf(" %s ", event.Name)
			ndx := 1
			for i, c := range name {
				strRune[i+ndx] = c
			}
		}

		if event.Location != "" {
			location := fmt.Sprintf(" %s ", event.Location)
			ndx := a.Columns/2 - len(location)/2
			for i, c := range location {
				strRune[i+ndx] = c
			}
		}

		if event.Date != "" {
			date := fmt.Sprintf(" %s ", event.Date)
			ndx := a.Columns - 1 - len(date)
			for i, c := range date {
				strRune[i+ndx] = c
			}
		}
		output += string(strRune) + "\n"
	}

	output += dottedString + "\n"
	fmt.Println(output)
}