Add titles command to show all IDs and titles

Signed-off-by: Oliver Davies <oliver@oliverdavies.uk>

internal/lib/git.go

@@ -0,0 +1,12 @@
+package lib
+
+import "os/exec"
+
+func execGitCommand(dir string, parts ...string) (string, error) {
+	args := append([]string{"-C", dir}, parts...)
+	command := exec.Command("git", args...)
+
+	output, err := command.CombinedOutput()
+
+	return string(output), err
+}

internal/lib/lib.go

@@ -0,0 +1,93 @@
+package lib
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"path"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func GetAllZets(dir string) []int {
+	zets, err := execGitCommand(dir, "ls-files")
+
+	if err != nil {
+		log.Println(err)
+	}
+
+	re := regexp.MustCompile(`[0-9]+`)
+	matches := re.FindAllString(zets, -1)
+
+	sort.Strings(matches)
+
+	ids := make(map[int]struct{})
+	for _, id := range matches {
+		num, err := strconv.Atoi(id)
+
+		if err == nil {
+			ids[num] = struct{}{}
+		}
+	}
+
+	var sorted []int
+	for num := range ids {
+		sorted = append(sorted, num)
+	}
+
+	sort.Ints(sorted)
+
+	return sorted
+}
+
+func ParseZetList(ids []int) []string {
+	var lines []string
+
+	green := "\033[32m"
+	reset := "\033[0m"
+
+	for _, num := range ids {
+		line := fmt.Sprintf("%s%s%s %s", green, strconv.Itoa(num), reset, getTitle(num))
+
+		fmt.Println(line)
+
+		lines = append(lines, line)
+	}
+
+	return lines
+}
+
+func getTitle(id int) string {
+	return getTitleFromFile(path.Join(strconv.Itoa(id), "index.adoc"))
+}
+
+func getTitleFromFile(filePath string) string {
+	filePath = path.Join("/home/opdavies/Documents/zet", filePath)
+
+	file, err := os.Open(filePath)
+
+	if err != nil {
+		fmt.Println("Error opening file:", err)
+
+		return ""
+	}
+
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+
+	if scanner.Scan() {
+		text := scanner.Text()
+
+		return strings.TrimPrefix(text, "= ")
+	}
+
+	if err := scanner.Err(); err != nil {
+		fmt.Println("Error reading file:", err)
+	}
+
+	return ""
+}