Fix label rendering (#30456)

1. Check whether the label is for an issue or a pull request.
2. Don't use space to layout
3. Make sure the test strings have trailing spaces explicitly, to avoid
some IDE removing the trailing spaces automatically.

3 files changed, 38 insertions, 15 deletions

diff --git a/modules/templates/util_render.go b/modules/templates/util_render.go
index 0b53965f25..659422aee7 100644
--- a/modules/templates/util_render.go
+++ b/modules/templates/util_render.go
@@ -216,15 +216,16 @@ func RenderMarkdownToHtml(ctx context.Context, input string) template.HTML { //n
 	return output
 }
 
-func RenderLabels(ctx context.Context, locale translation.Locale, labels []*issues_model.Label, repoLink string) template.HTML {
+func RenderLabels(ctx context.Context, locale translation.Locale, labels []*issues_model.Label, repoLink string, issue *issues_model.Issue) template.HTML {
+	isPullRequest := issue != nil && issue.IsPull
+	baseLink := fmt.Sprintf("%s/%s", repoLink, util.Iif(isPullRequest, "pulls", "issues"))
 	htmlCode := `<span class="labels-list">`
 	for _, label := range labels {
 		// Protect against nil value in labels - shouldn't happen but would cause a panic if so
 		if label == nil {
 			continue
 		}
-		htmlCode += fmt.Sprintf("<a href='%s/issues?labels=%d'>%s</a> ",
-			repoLink, label.ID, RenderLabel(ctx, locale, label))
+		htmlCode += fmt.Sprintf(`<a href="%s?labels=%d">%s</a>`, baseLink, label.ID, RenderLabel(ctx, locale, label))
 	}
 	htmlCode += "</span>"
 	return template.HTML(htmlCode)
diff --git a/modules/templates/util_render_test.go b/modules/templates/util_render_test.go
index 15aee8912d..47c5da6485 100644
--- a/modules/templates/util_render_test.go
+++ b/modules/templates/util_render_test.go
@@ -7,17 +7,21 @@ import (
 	"context"
 	"html/template"
 	"os"
+	"strings"
 	"testing"
 
+	"code.gitea.io/gitea/models/issues"
 	"code.gitea.io/gitea/models/unittest"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/translation"
 
 	"github.com/stretchr/testify/assert"
 )
 
-const testInput = `  space @mention-user  
+func testInput() string {
+	s := `  space @mention-user<SPACE><SPACE>
 /just/a/path.bin
 https://example.com/file.bin
 [local link](file.bin)
@@ -36,8 +40,10 @@ com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
 mail@domain.com
 @mention-user test
 #123
-  space  
+  space<SPACE><SPACE>
 `
+	return strings.ReplaceAll(s, "<SPACE>", " ")
+}
 
 var testMetas = map[string]string{
 	"user":     "user13",
@@ -121,23 +127,23 @@ com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
 <a href="/user13/repo11/issues/123" class="ref-issue">#123</a>
   space`
 
-	assert.EqualValues(t, expected, RenderCommitBody(context.Background(), testInput, testMetas))
+	assert.EqualValues(t, expected, RenderCommitBody(context.Background(), testInput(), testMetas))
 }
 
 func TestRenderCommitMessage(t *testing.T) {
 	expected := `space <a href="/mention-user" class="mention">@mention-user</a>  `
 
-	assert.EqualValues(t, expected, RenderCommitMessage(context.Background(), testInput, testMetas))
+	assert.EqualValues(t, expected, RenderCommitMessage(context.Background(), testInput(), testMetas))
 }
 
 func TestRenderCommitMessageLinkSubject(t *testing.T) {
 	expected := `<a href="https://example.com/link" class="default-link muted">space </a><a href="/mention-user" class="mention">@mention-user</a>`
 
-	assert.EqualValues(t, expected, RenderCommitMessageLinkSubject(context.Background(), testInput, "https://example.com/link", testMetas))
+	assert.EqualValues(t, expected, RenderCommitMessageLinkSubject(context.Background(), testInput(), "https://example.com/link", testMetas))
 }
 
 func TestRenderIssueTitle(t *testing.T) {
-	expected := `  space @mention-user  
+	expected := `  space @mention-user<SPACE><SPACE>
 /just/a/path.bin
 https://example.com/file.bin
 [local link](file.bin)
@@ -156,9 +162,10 @@ com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
 mail@domain.com
 @mention-user test
 <a href="/user13/repo11/issues/123" class="ref-issue">#123</a>
-  space  
+  space<SPACE><SPACE>
 `
-	assert.EqualValues(t, expected, RenderIssueTitle(context.Background(), testInput, testMetas))
+	expected = strings.ReplaceAll(expected, "<SPACE>", " ")
+	assert.EqualValues(t, expected, RenderIssueTitle(context.Background(), testInput(), testMetas))
 }
 
 func TestRenderMarkdownToHtml(t *testing.T) {
@@ -183,5 +190,20 @@ com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb mit
 #123
 space</p>
 `
-	assert.EqualValues(t, expected, RenderMarkdownToHtml(context.Background(), testInput))
+	assert.EqualValues(t, expected, RenderMarkdownToHtml(context.Background(), testInput()))
+}
+
+func TestRenderLabels(t *testing.T) {
+	ctx := context.Background()
+	locale := &translation.MockLocale{}
+
+	label := &issues.Label{ID: 123, Name: "label-name", Color: "label-color"}
+	issue := &issues.Issue{}
+	expected := `/owner/repo/issues?labels=123`
+	assert.Contains(t, RenderLabels(ctx, locale, []*issues.Label{label}, "/owner/repo", issue), expected)
+
+	label = &issues.Label{ID: 123, Name: "label-name", Color: "label-color"}
+	issue = &issues.Issue{IsPull: true}
+	expected = `/owner/repo/pulls?labels=123`
+	assert.Contains(t, RenderLabels(ctx, locale, []*issues.Label{label}, "/owner/repo", issue), expected)
 }
diff --git a/templates/repo/issue/view_content/comments.tmpl b/templates/repo/issue/view_content/comments.tmpl
index f65dc6ee90..d900d23c47 100644
--- a/templates/repo/issue/view_content/comments.tmpl
+++ b/templates/repo/issue/view_content/comments.tmpl
@@ -173,11 +173,11 @@
 					<span class="text grey muted-links">
 						{{template "shared/user/authorlink" .Poster}}
 						{{if and .AddedLabels (not .RemovedLabels)}}
-							{{ctx.Locale.TrN (len .AddedLabels) "repo.issues.add_label" "repo.issues.add_labels" (RenderLabels $.Context ctx.Locale .AddedLabels $.RepoLink) $createdStr}}
+							{{ctx.Locale.TrN (len .AddedLabels) "repo.issues.add_label" "repo.issues.add_labels" (RenderLabels ctx ctx.Locale .AddedLabels $.RepoLink .Issue) $createdStr}}
 						{{else if and (not .AddedLabels) .RemovedLabels}}
-							{{ctx.Locale.TrN (len .RemovedLabels) "repo.issues.remove_label" "repo.issues.remove_labels" (RenderLabels $.Context ctx.Locale .RemovedLabels $.RepoLink) $createdStr}}
+							{{ctx.Locale.TrN (len .RemovedLabels) "repo.issues.remove_label" "repo.issues.remove_labels" (RenderLabels ctx ctx.Locale .RemovedLabels $.RepoLink .Issue) $createdStr}}
 						{{else}}
-							{{ctx.Locale.Tr "repo.issues.add_remove_labels" (RenderLabels $.Context ctx.Locale .AddedLabels $.RepoLink) (RenderLabels $.Context ctx.Locale .RemovedLabels $.RepoLink) $createdStr}}
+							{{ctx.Locale.Tr "repo.issues.add_remove_labels" (RenderLabels ctx ctx.Locale .AddedLabels $.RepoLink .Issue) (RenderLabels ctx ctx.Locale .RemovedLabels $.RepoLink .Issue) $createdStr}}
 						{{end}}
 					</span>
 				</div>