Refactor some Str2html code (#29397)

This PR touches the most interesting part of the "template refactoring".

1. Unclear variable type. Especially for "web/feed/convert.go":
sometimes it uses text, sometimes it uses HTML.
2. Assign text content to "RenderedContent" field, for example: `
project.RenderedContent = project.Description` in web/org/projects.go
3. Assign rendered content to text field, for example: `r.Note =
rendered content` in web/repo/release.go
4. (possible) Incorrectly calling `{{Str2html
.PackageDescriptor.Metadata.ReleaseNotes}}` in
package/content/nuget.tmpl, I guess the name Str2html misleads
developers to use it to "render string to html", but it only sanitizes.
if ReleaseNotes really contains HTML, then this is not a problem.

(cherry picked from commit e71eb8930a5d0f60874b038c223498b41ad65592)

Conflicts:
	modules/templates/util_string.go
	trivial context conflict

routers/web/feed/convert.go

@@ -51,7 +51,7 @@ func toReleaseLink(ctx *context.Context, act *activities_model.Action) string {
 
 // renderMarkdown creates a minimal markdown render context from an action.
 // If rendering fails, the original markdown text is returned
-func renderMarkdown(ctx *context.Context, act *activities_model.Action, content string) string {
+func renderMarkdown(ctx *context.Context, act *activities_model.Action, content string) template.HTML {
 	markdownCtx := &markup.RenderContext{
 		Ctx: ctx,
 		Links: markup.Links{
@@ -65,7 +65,7 @@ func renderMarkdown(ctx *context.Context, act *activities_model.Action, content
 	}
 	markdown, err := markdown.RenderString(markdownCtx, content)
 	if err != nil {
-		return content
+		return templates.Str2html(content) // old code did so: use Str2html to render in tmpl
 	}
 	return markdown
 }
@@ -75,7 +75,11 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 	for _, act := range actions {
 		act.LoadActUser(ctx)
 
-		var content, desc, title string
+		// TODO: the code seems quite strange (maybe not right)
+		// sometimes it uses text content but sometimes it uses HTML content
+		// it should clearly defines which kind of content it should use for the feed items: plan text or rich HTML
+		var title, desc string
+		var content template.HTML
 
 		link := &feeds.Link{Href: act.GetCommentHTMLURL(ctx)}
 
@@ -229,7 +233,7 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 				desc = act.GetIssueTitle(ctx)
 				comment := act.GetIssueInfos()[1]
 				if len(comment) != 0 {
-					desc += "\n\n" + renderMarkdown(ctx, act, comment)
+					desc += "\n\n" + string(renderMarkdown(ctx, act, comment))
 				}
 			case activities_model.ActionMergePullRequest, activities_model.ActionAutoMergePullRequest:
 				desc = act.GetIssueInfos()[1]
@@ -240,7 +244,7 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 			}
 		}
 		if len(content) == 0 {
-			content = desc
+			content = templates.Str2html(desc)
 		}
 
 		// It's a common practice for feed generators to use plain text titles.
@@ -261,7 +265,7 @@ func feedActionsToFeedItems(ctx *context.Context, actions activities_model.Actio
 			},
 			Id:      fmt.Sprintf("%v: %v", strconv.FormatInt(act.ID, 10), link.Href),
 			Created: act.CreatedUnix.AsTime(),
-			Content: content,
+			Content: string(content),
 		})
 	}
 	return items, err
@@ -290,7 +294,8 @@ func releasesToFeedItems(ctx *context.Context, releases []*repo_model.Release, i
 			return nil, err
 		}
 
-		var title, content string
+		var title string
+		var content template.HTML
 
 		if rel.IsTag {
 			title = rel.TagName
@@ -319,7 +324,7 @@ func releasesToFeedItems(ctx *context.Context, releases []*repo_model.Release, i
 				Email: rel.Publisher.GetEmail(),
 			},
 			Id:      fmt.Sprintf("%v: %v", strconv.FormatInt(rel.ID, 10), link.Href),
-			Content: content,
+			Content: string(content),
 		})
 	}
 

routers/web/feed/profile.go

@@ -58,7 +58,7 @@ func showUserFeed(ctx *context.Context, formatType string) {
 	feed := &feeds.Feed{
 		Title:       ctx.Locale.TrString("home.feed_of", ctx.ContextUser.DisplayName()),
 		Link:        &feeds.Link{Href: ctx.ContextUser.HTMLURL()},
-		Description: ctxUserDescription,
+		Description: string(ctxUserDescription),
 		Created:     time.Now(),
 	}
 

routers/web/org/projects.go

@@ -19,6 +19,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/modules/web"
 	shared_user "code.gitea.io/gitea/routers/web/shared/user"
@@ -104,7 +105,7 @@ func Projects(ctx *context.Context) {
 	}
 
 	for _, project := range projects {
-		project.RenderedContent = project.Description
+		project.RenderedContent = templates.Str2html(project.Description) // FIXME: is it right? why not render?
 	}
 
 	err = shared_user.LoadHeaderCount(ctx)
@@ -395,7 +396,7 @@ func ViewProject(ctx *context.Context) {
 		}
 	}
 
-	project.RenderedContent = project.Description
+	project.RenderedContent = templates.Str2html(project.Description) // FIXME: is it right? why not render?
 	ctx.Data["LinkedPRs"] = linkedPrsMap
 	ctx.Data["PageIsViewProjects"] = true
 	ctx.Data["CanWriteProjects"] = canWriteProjects(ctx)

routers/web/repo/issue.go

@@ -42,6 +42,7 @@ import (
 	repo_module "code.gitea.io/gitea/modules/repository"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/templates"
 	"code.gitea.io/gitea/modules/templates/vars"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
@@ -1769,7 +1770,7 @@ func ViewIssue(ctx *context.Context) {
 				// so "|" is used as delimeter to mark the new format
 				if comment.Content[0] != '|' {
 					// handle old time comments that have formatted text stored
-					comment.RenderedContent = comment.Content
+					comment.RenderedContent = templates.Str2html(comment.Content)
 					comment.Content = ""
 				} else {
 					// else it's just a duration in seconds to pass on to the frontend

routers/web/repo/release.go

@@ -113,7 +113,7 @@ func getReleaseInfos(ctx *context.Context, opts *repo_model.FindReleasesOptions)
 			cacheUsers[r.PublisherID] = r.Publisher
 		}
 
-		r.Note, err = markdown.RenderString(&markup.RenderContext{
+		r.RenderedNote, err = markdown.RenderString(&markup.RenderContext{
 			Links: markup.Links{
 				Base: ctx.Repo.RepoLink,
 			},