Added an example of how to add a label to an issue (#442)

closes #441

Co-authored-by: Luciano da Silva Ribas <lucribas@users>

examples/addlabel/main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"syscall"
+
+	jira "github.com/andygrunwald/go-jira"
+	"golang.org/x/term"
+)
+
+func main() {
+	r := bufio.NewReader(os.Stdin)
+
+	fmt.Print("Jira URL: ")
+	jiraURL, _ := r.ReadString('\n')
+
+	fmt.Print("Jira Username: ")
+	username, _ := r.ReadString('\n')
+
+	fmt.Print("Jira Password: ")
+	bytePassword, _ := term.ReadPassword(int(syscall.Stdin))
+	password := string(bytePassword)
+
+	fmt.Print("Jira Issue ID: ")
+	issueId, _ := r.ReadString('\n')
+	issueId = strings.TrimSpace(issueId)
+
+	fmt.Print("Label: ")
+	label, _ := r.ReadString('\n')
+	label = strings.TrimSpace(label)
+
+	tp := jira.BasicAuthTransport{
+		Username: strings.TrimSpace(username),
+		Password: strings.TrimSpace(password),
+	}
+
+	client, err := jira.NewClient(tp.Client(), strings.TrimSpace(jiraURL))
+	if err != nil {
+		fmt.Printf("\nerror: %v\n", err)
+		return
+	}
+
+	type Labels struct {
+		Add string `json:"add" structs:"add"`
+	}
+
+	type Update struct {
+		Labels []Labels `json:"labels" structs:"labels"`
+	}
+
+	c := map[string]interface{}{
+		"update": Update{
+			Labels: []Labels{
+				{
+					Add: label,
+				},
+			},
+		},
+	}
+
+	resp, err := client.Issue.UpdateIssue(issueId, c)
+
+	if err != nil {
+		fmt.Println(err)
+	}
+	body, _ := ioutil.ReadAll(resp.Body)
+	fmt.Println(string(body))
+
+	issue, _, _ := client.Issue.Get(issueId, nil)
+
+	fmt.Printf("Issue: %s:%s\n", issue.Key, issue.Fields.Summary)
+	fmt.Printf("\tLabels: %+v\n", issue.Fields.Labels)
+}