73 lines
1.2 KiB
Go
73 lines
1.2 KiB
Go
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package main
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// TODO: read a file line by line
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// use heading struct with
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// line content
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// line number
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// heading level
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import (
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"fmt"
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"log"
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"os"
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"strings"
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)
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func is_heading(line string) bool {
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if strings.HasPrefix(line, "#") {
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return true
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} else {
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return false
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}
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}
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func get_heading_level(heading string) int {
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level := 0
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for i := 0; heading[i] == '#'; i++ {
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level += 1
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}
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return level
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}
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func print_toc(headings []string) {
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tab_count := 0
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for index, value := range headings {
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if index > 0 {
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prev_level := get_heading_level(headings[index-1])
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cur_level := get_heading_level(headings[index])
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if cur_level > prev_level {
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tab_count += (cur_level - prev_level)
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} else if cur_level < prev_level {
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tab_count -= (prev_level - cur_level)
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}
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for i := 0; i < tab_count; i++ {
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fmt.Printf("\t")
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}
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}
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fmt.Printf("%s\n", value)
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}
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}
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func main() {
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file_content_raw, err := os.ReadFile(os.Args[1])
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var headings []string = nil
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if err != nil {
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log.Fatal(err)
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}
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var file_content string = string(file_content_raw)
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file_lines := strings.Split(file_content, "\n")
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for _, value := range file_lines {
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if is_heading(value) {
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headings = append(headings, value)
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}
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}
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print_toc(headings)
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}
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