Refactor commentTags functionality (#17558)

* feat: Allow multiple tags on comments

- Allow for multiples tags(Currently Poster + {Owner, Writer}).
- Utilize the Poster tag within the commentTag function and remove the
checking from templates.
- Use bitwise on CommentTags to enable specific tags.
- Don't show poster tag(view_content.tmpl) on the initial issue comment.

* Change parameters naming

* Change function name

* refactor variable wording

* Merge 'master' branch into 'tags-comments' branch

* Change naming

* `tag` -> `role`

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

5 files changed, 111 insertions, 74 deletions

diff --git a/models/issue.go b/models/issue.go
index f36267c945..0d34bdcaf3 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -71,7 +71,7 @@ type Issue struct {
 	IsLocked bool `xorm:"NOT NULL DEFAULT false"`
 
 	// For view issue page.
-	ShowTag CommentTag `xorm:"-"`
+	ShowRole RoleDescriptor `xorm:"-"`
 }
 
 var (
diff --git a/models/issue_comment.go b/models/issue_comment.go
index ad10b53b37..a41f4cb298 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -105,17 +105,43 @@ const (
 	CommentTypeDismissReview
 )
 
-// CommentTag defines comment tag type
-type CommentTag int
+// RoleDescriptor defines comment tag type
+type RoleDescriptor int
 
-// Enumerate all the comment tag types
+// Enumerate all the role tags.
 const (
-	CommentTagNone CommentTag = iota
-	CommentTagPoster
-	CommentTagWriter
-	CommentTagOwner
+	RoleDescriptorNone RoleDescriptor = iota
+	RoleDescriptorPoster
+	RoleDescriptorWriter
+	RoleDescriptorOwner
 )
 
+// WithRole enable a specific tag on the RoleDescriptor.
+func (rd RoleDescriptor) WithRole(role RoleDescriptor) RoleDescriptor {
+	rd |= (1 << role)
+	return rd
+}
+
+func stringToRoleDescriptor(role string) RoleDescriptor {
+	switch role {
+	case "Poster":
+		return RoleDescriptorPoster
+	case "Writer":
+		return RoleDescriptorWriter
+	case "Owner":
+		return RoleDescriptorOwner
+	default:
+		return RoleDescriptorNone
+	}
+}
+
+// HasRole returns if a certain role is enabled on the RoleDescriptor.
+func (rd RoleDescriptor) HasRole(role string) bool {
+	roleDescriptor := stringToRoleDescriptor(role)
+	bitValue := rd & (1 << roleDescriptor)
+	return (bitValue > 0)
+}
+
 // Comment represents a comment in commit and issue page.
 type Comment struct {
 	ID               int64       `xorm:"pk autoincr"`
@@ -174,7 +200,7 @@ type Comment struct {
 	Reactions   ReactionList  `xorm:"-"`
 
 	// For view issue page.
-	ShowTag CommentTag `xorm:"-"`
+	ShowRole RoleDescriptor `xorm:"-"`
 
 	Review      *Review `xorm:"-"`
 	ReviewID    int64   `xorm:"index"`
diff --git a/routers/web/repo/issue.go b/routers/web/repo/issue.go
index 93b6b7a305..d9e15a784f 100644
--- a/routers/web/repo/issue.go
+++ b/routers/web/repo/issue.go
@@ -1015,38 +1015,46 @@ func NewIssuePost(ctx *context.Context) {
 	}
 }
 
-// commentTag returns the CommentTag for a comment in/with the given repo, poster and issue
-func commentTag(repo *models.Repository, poster *models.User, issue *models.Issue) (models.CommentTag, error) {
+// roleDescriptor returns the Role Decriptor for a comment in/with the given repo, poster and issue
+func roleDescriptor(repo *models.Repository, poster *models.User, issue *models.Issue) (models.RoleDescriptor, error) {
 	perm, err := models.GetUserRepoPermission(repo, poster)
 	if err != nil {
-		return models.CommentTagNone, err
+		return models.RoleDescriptorNone, err
 	}
-	if perm.IsOwner() {
-		if !poster.IsAdmin {
-			return models.CommentTagOwner, nil
-		}
 
-		ok, err := models.IsUserRealRepoAdmin(repo, poster)
-		if err != nil {
-			return models.CommentTagNone, err
-		}
+	// By default the poster has no roles on the comment.
+	roleDescriptor := models.RoleDescriptorNone
 
-		if ok {
-			return models.CommentTagOwner, nil
-		}
+	// Check if the poster is owner of the repo.
+	if perm.IsOwner() {
+		// If the poster isn't a admin, enable the owner role.
+		if !poster.IsAdmin {
+			roleDescriptor = roleDescriptor.WithRole(models.RoleDescriptorOwner)
+		} else {
 
-		if ok, err = repo.IsCollaborator(poster.ID); ok && err == nil {
-			return models.CommentTagWriter, nil
+			// Otherwise check if poster is the real repo admin.
+			ok, err := models.IsUserRealRepoAdmin(repo, poster)
+			if err != nil {
+				return models.RoleDescriptorNone, err
+			}
+			if ok {
+				roleDescriptor = roleDescriptor.WithRole(models.RoleDescriptorOwner)
+			}
 		}
+	}
 
-		return models.CommentTagNone, err
+	// Is the poster can write issues or pulls to the repo, enable the Writer role.
+	// Only enable this if the poster doesn't have the owner role already.
+	if !roleDescriptor.HasRole("Owner") && perm.CanWriteIssuesOrPulls(issue.IsPull) {
+		roleDescriptor = roleDescriptor.WithRole(models.RoleDescriptorWriter)
 	}
 
-	if perm.CanWriteIssuesOrPulls(issue.IsPull) {
-		return models.CommentTagWriter, nil
+	// If the poster is the actual poster of the issue, enable Poster role.
+	if issue.IsPoster(poster.ID) {
+		roleDescriptor = roleDescriptor.WithRole(models.RoleDescriptorPoster)
 	}
 
-	return models.CommentTagNone, nil
+	return roleDescriptor, nil
 }
 
 func getBranchData(ctx *context.Context, issue *models.Issue) {
@@ -1249,9 +1257,9 @@ func ViewIssue(ctx *context.Context) {
 	}
 
 	var (
-		tag          models.CommentTag
+		role         models.RoleDescriptor
 		ok           bool
-		marked       = make(map[int64]models.CommentTag)
+		marked       = make(map[int64]models.RoleDescriptor)
 		comment      *models.Comment
 		participants = make([]*models.User, 1, 10)
 	)
@@ -1298,11 +1306,11 @@ func ViewIssue(ctx *context.Context) {
 	// check if dependencies can be created across repositories
 	ctx.Data["AllowCrossRepositoryDependencies"] = setting.Service.AllowCrossRepositoryDependencies
 
-	if issue.ShowTag, err = commentTag(repo, issue.Poster, issue); err != nil {
-		ctx.ServerError("commentTag", err)
+	if issue.ShowRole, err = roleDescriptor(repo, issue.Poster, issue); err != nil {
+		ctx.ServerError("roleDescriptor", err)
 		return
 	}
-	marked[issue.PosterID] = issue.ShowTag
+	marked[issue.PosterID] = issue.ShowRole
 
 	// Render comments and and fetch participants.
 	participants[0] = issue.Poster
@@ -1331,18 +1339,18 @@ func ViewIssue(ctx *context.Context) {
 				return
 			}
 			// Check tag.
-			tag, ok = marked[comment.PosterID]
+			role, ok = marked[comment.PosterID]
 			if ok {
-				comment.ShowTag = tag
+				comment.ShowRole = role
 				continue
 			}
 
-			comment.ShowTag, err = commentTag(repo, comment.Poster, issue)
+			comment.ShowRole, err = roleDescriptor(repo, comment.Poster, issue)
 			if err != nil {
-				ctx.ServerError("commentTag", err)
+				ctx.ServerError("roleDescriptor", err)
 				return
 			}
-			marked[comment.PosterID] = comment.ShowTag
+			marked[comment.PosterID] = comment.ShowRole
 			participants = addParticipant(comment.Poster, participants)
 		} else if comment.Type == models.CommentTypeLabel {
 			if err = comment.LoadLabel(); err != nil {
@@ -1430,18 +1438,18 @@ func ViewIssue(ctx *context.Context) {
 				for _, lineComments := range codeComments {
 					for _, c := range lineComments {
 						// Check tag.
-						tag, ok = marked[c.PosterID]
+						role, ok = marked[c.PosterID]
 						if ok {
-							c.ShowTag = tag
+							c.ShowRole = role
 							continue
 						}
 
-						c.ShowTag, err = commentTag(repo, c.Poster, issue)
+						c.ShowRole, err = roleDescriptor(repo, c.Poster, issue)
 						if err != nil {
-							ctx.ServerError("commentTag", err)
+							ctx.ServerError("roleDescriptor", err)
 							return
 						}
-						marked[c.PosterID] = c.ShowTag
+						marked[c.PosterID] = c.ShowRole
 						participants = addParticipant(c.Poster, participants)
 					}
 				}
diff --git a/templates/repo/issue/view_content.tmpl b/templates/repo/issue/view_content.tmpl
index 9ad6bee651..29c8626596 100644
--- a/templates/repo/issue/view_content.tmpl
+++ b/templates/repo/issue/view_content.tmpl
@@ -49,14 +49,17 @@
 						</div>
 						<div class="comment-header-right actions df ac">
 							{{if not $.Repository.IsArchived}}
-								{{if gt .Issue.ShowTag 0}}
-									<div class="ui basic label">
-										{{if eq .Issue.ShowTag 2}}
+								{{if gt .Issue.ShowRole 0}}
+									{{if (.Issue.ShowRole.HasRole "Writer")}}
+										<div class="ui basic label">
 											{{$.i18n.Tr "repo.issues.collaborator"}}
-										{{else if eq .Issue.ShowTag 3}}
+										</div>
+									{{end}}
+									{{if (.Issue.ShowRole.HasRole "Owner")}}
+										<div class="ui basic label">
 											{{$.i18n.Tr "repo.issues.owner"}}
-										{{end}}
-									</div>
+										</div>
+									{{end}}
 								{{end}}
 								{{template "repo/issue/view_content/add_reaction" Dict "ctx" $ "ActionURL" (Printf "%s/issues/%d/reactions" $.RepoLink .Issue.Index)}}
 								{{template "repo/issue/view_content/context_menu" Dict "ctx" $ "item" .Issue "delete" false "issue" true "diff" false "IsCommentPoster" $.IsIssuePoster}}
diff --git a/templates/repo/issue/view_content/comments.tmpl b/templates/repo/issue/view_content/comments.tmpl
index 51d1e093c8..57ec007bed 100644
--- a/templates/repo/issue/view_content/comments.tmpl
+++ b/templates/repo/issue/view_content/comments.tmpl
@@ -44,18 +44,19 @@
 					</div>
 					<div class="comment-header-right actions df ac">
 						{{if not $.Repository.IsArchived}}
-							{{if or (and (eq .PosterID .Issue.PosterID) (eq .Issue.OriginalAuthorID 0)) (and (eq .Issue.OriginalAuthorID .OriginalAuthorID) (not (eq .OriginalAuthorID 0))) }}
+							{{if (.ShowRole.HasRole "Poster")}}
 								<div class="ui basic label">
 									{{$.i18n.Tr "repo.issues.poster"}}
 								</div>
 							{{end}}
-							{{if gt .ShowTag 0}}
+							{{if (.ShowRole.HasRole "Writer")}}
 								<div class="ui basic label">
-									{{if eq .ShowTag 2}}
-										{{$.i18n.Tr "repo.issues.collaborator"}}
-									{{else if eq .ShowTag 3}}
-										{{$.i18n.Tr "repo.issues.owner"}}
-									{{end}}
+									{{$.i18n.Tr "repo.issues.collaborator"}}
+								</div>
+							{{end}}
+							{{if (.ShowRole.HasRole "Owner")}}
+								<div class="ui basic label">
+									{{$.i18n.Tr "repo.issues.owner"}}
 								</div>
 							{{end}}
 							{{template "repo/issue/view_content/add_reaction" Dict "ctx" $ "ActionURL" (Printf "%s/comments/%d/reactions" $.RepoLink .ID)}}
@@ -549,24 +550,23 @@
 															</span>
 														</div>
 														<div class="comment-header-right actions df ac">
-															{{if not $.Repository.IsArchived}}
-																{{if or (and (eq .PosterID $.Issue.PosterID) (eq $.Issue.OriginalAuthorID 0)) (eq $.Issue.OriginalAuthorID .OriginalAuthorID) }}
-																	<div class="ui basic label">
-																		{{$.i18n.Tr "repo.issues.poster"}}
-																	</div>
-																{{end}}
-																{{if gt .ShowTag 0}}
-																	<div class="ui basic label">
-																		{{if eq .ShowTag 2}}
-																			{{$.i18n.Tr "repo.issues.collaborator"}}
-																		{{else if eq .ShowTag 3}}
-																			{{$.i18n.Tr "repo.issues.owner"}}
-																		{{end}}
-																	</div>
-																{{end}}
-																{{template "repo/issue/view_content/add_reaction" Dict "ctx" $ "ActionURL" (Printf "%s/comments/%d/reactions" $.RepoLink .ID)}}
-																{{template "repo/issue/view_content/context_menu" Dict "ctx" $ "item" . "delete" true "issue" true "diff" true "IsCommentPoster" (and $.IsSigned (eq $.SignedUserID .PosterID))}}
+															{{if (.ShowRole.HasRole "Poster")}}
+																<div class="ui basic label">
+																	{{$.i18n.Tr "repo.issues.poster"}}
+																</div>
+															{{end}}
+															{{if (.ShowRole.HasRole "Writer")}}
+																<div class="ui basic label">
+																	{{$.i18n.Tr "repo.issues.collaborator"}}
+																</div>
+															{{end}}
+															{{if (.ShowRole.HasRole "Owner")}}
+																<div class="ui basic label">
+																	{{$.i18n.Tr "repo.issues.owner"}}
+																</div>
 															{{end}}
+															{{template "repo/issue/view_content/add_reaction" Dict "ctx" $ "ActionURL" (Printf "%s/comments/%d/reactions" $.RepoLink .ID)}}
+															{{template "repo/issue/view_content/context_menu" Dict "ctx" $ "item" . "delete" true "issue" true "diff" true "IsCommentPoster" (and $.IsSigned (eq $.SignedUserID .PosterID))}}
 														</div>
 													</div>
 													<div class="text comment-content">