appview/pulls: show "delete branch" button for merged PRs

Signed-off-by: oppiliappan <[e-mail]>

appview/models/pull.go

···
 
 	return mergeable
 }
+
+type BranchDeleteStatus struct {
+	Repo   *Repo
+	Branch string
+}

appview/pages/pages.go

···
 }
 
 type RepoSinglePullParams struct {
-	LoggedInUser   *oauth.User
-	RepoInfo       repoinfo.RepoInfo
-	Active         string
-	Pull           *models.Pull
-	Stack          models.Stack
-	AbandonedPulls []*models.Pull
-	MergeCheck     types.MergeCheckResponse
-	ResubmitCheck  ResubmitResult
-	Pipelines      map[string]models.Pipeline
+	LoggedInUser       *oauth.User
+	RepoInfo           repoinfo.RepoInfo
+	Active             string
+	Pull               *models.Pull
+	Stack              models.Stack
+	AbandonedPulls     []*models.Pull
+	BranchDeleteStatus *models.BranchDeleteStatus
+	MergeCheck         types.MergeCheckResponse
+	ResubmitCheck      ResubmitResult
+	Pipelines          map[string]models.Pipeline
 
 	OrderedReactionKinds []models.ReactionKind
 	Reactions            map[models.ReactionKind]models.ReactionDisplayData
···
 }
 
 type PullActionsParams struct {
-	LoggedInUser  *oauth.User
-	RepoInfo      repoinfo.RepoInfo
-	Pull          *models.Pull
-	RoundNumber   int
-	MergeCheck    types.MergeCheckResponse
-	ResubmitCheck ResubmitResult
-	Stack         models.Stack
+	LoggedInUser       *oauth.User
+	RepoInfo           repoinfo.RepoInfo
+	Pull               *models.Pull
+	RoundNumber        int
+	MergeCheck         types.MergeCheckResponse
+	ResubmitCheck      ResubmitResult
+	BranchDeleteStatus *models.BranchDeleteStatus
+	Stack              models.Stack
 }
 
 func (p *Pages) PullActionsFragment(w io.Writer, params PullActionsParams) error {

appview/pages/templates/repo/pulls/fragments/pullActions.html

···
             <span>comment</span>
             {{ i "loader-circle" "w-4 h-4 animate-spin hidden group-[.htmx-request]:inline" }}
         </button>
+        {{ if .BranchDeleteStatus }}
+          <button 
+            hx-delete="/{{ .BranchDeleteStatus.Repo.Did }}/{{ .BranchDeleteStatus.Repo.Name }}/branches"
+            hx-vals='{"branch": "{{ .BranchDeleteStatus.Branch }}" }'
+            hx-swap="none"
+            class="btn p-2 flex items-center gap-2 no-underline hover:no-underline group text-red-500 hover:text-red-700 dark:text-red-400 dark:hover:text-red-300">
+              {{ i "git-branch" "w-4 h-4" }}
+              <span>delete branch</span>
+              {{ i "loader-circle" "w-4 h-4 animate-spin hidden group-[.htmx-request]:inline" }}
+          </button>
+        {{ end }}
         {{ if and $isPushAllowed $isOpen $isLastRound }}
           {{ $disabled := "" }}
           {{ if $isConflicted }}

appview/pages/templates/repo/pulls/pull.html

···
           {{ end }}
 
           {{ if $.LoggedInUser }}
-            {{ template "repo/pulls/fragments/pullActions" (dict "LoggedInUser" $.LoggedInUser "Pull" $.Pull "RepoInfo" $.RepoInfo "RoundNumber" .RoundNumber "MergeCheck" $.MergeCheck "ResubmitCheck" $.ResubmitCheck "Stack" $.Stack) }}
+            {{ template "repo/pulls/fragments/pullActions" 
+              (dict 
+                "LoggedInUser" $.LoggedInUser
+                "Pull" $.Pull
+                "RepoInfo" $.RepoInfo
+                "RoundNumber" .RoundNumber
+                "MergeCheck" $.MergeCheck
+                "ResubmitCheck" $.ResubmitCheck
+                "BranchDeleteStatus" $.BranchDeleteStatus
+                "Stack" $.Stack) }}
           {{ else }}
             <div class="bg-amber-50 dark:bg-amber-900 border border-amber-500 rounded drop-shadow-sm p-2 relative flex gap-2 items-center w-fit">
               <a href="/signup" class="btn-create py-0 hover:no-underline hover:text-white flex items-center gap-2">

appview/pulls/pulls.go

···
 		}
 
 		mergeCheckResponse := s.mergeCheck(r, f, pull, stack)
+		branchDeleteStatus := s.branchDeleteStatus(r, f, pull)
 		resubmitResult := pages.Unknown
 		if user.Did == pull.OwnerDid {
 			resubmitResult = s.resubmitCheck(r, f, pull, stack)
 		}
 
 		s.pages.PullActionsFragment(w, pages.PullActionsParams{
-			LoggedInUser:  user,
-			RepoInfo:      f.RepoInfo(user),
-			Pull:          pull,
-			RoundNumber:   roundNumber,
-			MergeCheck:    mergeCheckResponse,
-			ResubmitCheck: resubmitResult,
-			Stack:         stack,
+			LoggedInUser:       user,
+			RepoInfo:           f.RepoInfo(user),
+			Pull:               pull,
+			RoundNumber:        roundNumber,
+			MergeCheck:         mergeCheckResponse,
+			ResubmitCheck:      resubmitResult,
+			BranchDeleteStatus: branchDeleteStatus,
+			Stack:              stack,
 		})
 		return
 	}
···
 	}
 
 	mergeCheckResponse := s.mergeCheck(r, f, pull, stack)
+	branchDeleteStatus := s.branchDeleteStatus(r, f, pull)
 	resubmitResult := pages.Unknown
 	if user != nil && user.Did == pull.OwnerDid {
 		resubmitResult = s.resubmitCheck(r, f, pull, stack)
···
 	}
 
 	s.pages.RepoSinglePull(w, pages.RepoSinglePullParams{
-		LoggedInUser:   user,
-		RepoInfo:       repoInfo,
-		Pull:           pull,
-		Stack:          stack,
-		AbandonedPulls: abandonedPulls,
-		MergeCheck:     mergeCheckResponse,
-		ResubmitCheck:  resubmitResult,
-		Pipelines:      m,
+		LoggedInUser:       user,
+		RepoInfo:           repoInfo,
+		Pull:               pull,
+		Stack:              stack,
+		AbandonedPulls:     abandonedPulls,
+		BranchDeleteStatus: branchDeleteStatus,
+		MergeCheck:         mergeCheckResponse,
+		ResubmitCheck:      resubmitResult,
+		Pipelines:          m,
 
 		OrderedReactionKinds: models.OrderedReactionKinds,
 		Reactions:            reactionMap,
···
 	}
 
 	return result
+}
+
+func (s *Pulls) branchDeleteStatus(r *http.Request, f *reporesolver.ResolvedRepo, pull *models.Pull) *models.BranchDeleteStatus {
+	if pull.State != models.PullMerged {
+		return nil
+	}
+
+	user := s.oauth.GetUser(r)
+	if user == nil {
+		return nil
+	}
+
+	var branch string
+	var repo *models.Repo
+	// check if the branch exists
+	// NOTE: appview could cache branches/tags etc. for every repo by listening for gitRefUpdates
+	if pull.IsBranchBased() {
+		branch = pull.PullSource.Branch
+		repo = &f.Repo
+	} else if pull.IsForkBased() {
+		branch = pull.PullSource.Branch
+		repo = pull.PullSource.Repo
+	} else {
+		return nil
+	}
+
+	scheme := "http"
+	if !s.config.Core.Dev {
+		scheme = "https"
+	}
+	host := fmt.Sprintf("%s://%s", scheme, repo.Knot)
+	xrpcc := &indigoxrpc.Client{
+		Host: host,
+	}
+
+	resp, err := tangled.RepoBranch(r.Context(), xrpcc, branch, fmt.Sprintf("%s/%s", repo.Did, repo.Name))
+	if xrpcerr := xrpcclient.HandleXrpcErr(err); xrpcerr != nil {
+		return nil
+	}
+
+	return &models.BranchDeleteStatus{
+		Repo:   repo,
+		Branch: resp.Name,
+	}
 }
 
 func (s *Pulls) resubmitCheck(r *http.Request, f *reporesolver.ResolvedRepo, pull *models.Pull, stack models.Stack) pages.ResubmitResult {