Load mentionValues asynchronously (#36739)

Eliminate a few database queries on all issue and pull request pages by moving mention autocomplete data to async JSON endpoints fetched on-demand when the user types `@`. See https://github.com/go-gitea/gitea/pull/36739#issuecomment-3963184858 for the full table of affected pages. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
2026-03-17 14:24:07 +00:00 · 2026-03-07 21:37:37 +01:00
parent f250138f57
commit 130e34994f
32 changed files with 363 additions and 161 deletions
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -141,7 +141,7 @@ func NewFuncMap() template.FuncMap {
 		"ReactionToEmoji": reactionToEmoji,

 		// -----------------------------------------------------------------
-		// misc
+		// misc (TODO: move them to MiscUtils to avoid bloating the main func map)
 		"ShortSha":                 base.ShortSha,
 		"ActionContent2Commits":    ActionContent2Commits,
 		"IsMultilineCommitMessage": isMultilineCommitMessage,
--- a/modules/templates/util_misc.go
+++ b/modules/templates/util_misc.go
@@ -14,10 +14,12 @@ import (

 	activities_model "code.gitea.io/gitea/models/activities"
 	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/repository"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/svg"

 	"github.com/editorconfig/editorconfig-core-go/v2"
@@ -185,3 +187,49 @@ func tabSizeClass(ec *editorconfig.Editorconfig, filename string) string {
 	}
 	return "tab-size-4"
 }
+
+type MiscUtils struct {
+	ctx context.Context
+}
+
+func NewMiscUtils(ctx context.Context) *MiscUtils {
+	return &MiscUtils{ctx: ctx}
+}
+
+type MarkdownEditorContext struct {
+	PreviewMode    string // "comment", "wiki", or empty for general
+	PreviewContext string // the path for resolving the links in the preview (repo preview already has default correct value)
+	PreviewLink    string
+	MentionsLink   string
+}
+
+func (m *MiscUtils) MarkdownEditorComment(repo *repo_model.Repository) *MarkdownEditorContext {
+	if repo == nil {
+		return nil
+	}
+	return &MarkdownEditorContext{
+		PreviewMode:  "comment",
+		PreviewLink:  repo.Link() + "/markup",
+		MentionsLink: repo.Link() + "/-/mentions-in-repo",
+	}
+}
+
+func (m *MiscUtils) MarkdownEditorWiki(repo *repo_model.Repository) *MarkdownEditorContext {
+	if repo == nil {
+		return nil
+	}
+	return &MarkdownEditorContext{
+		PreviewMode:  "wiki",
+		PreviewLink:  repo.Link() + "/markup",
+		MentionsLink: repo.Link() + "/-/mentions-in-repo",
+	}
+}
+
+func (m *MiscUtils) MarkdownEditorGeneral(owner *user_model.User) *MarkdownEditorContext {
+	ret := &MarkdownEditorContext{PreviewLink: setting.AppSubURL + "/-/markup"}
+	if owner != nil {
+		ret.PreviewContext = owner.HomeLink()
+		ret.MentionsLink = owner.HomeLink() + "/-/mentions-in-owner"
+	}
+	return ret
+}
--- a/routers/common/markup.go
+++ b/routers/common/markup.go
@@ -6,14 +6,12 @@ package common

 import (
 	"errors"
-	"fmt"
 	"net/http"
 	"path"
 	"strings"

 	"code.gitea.io/gitea/models/renderhelper"
 	"code.gitea.io/gitea/models/repo"
-	"code.gitea.io/gitea/modules/httplib"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/markup/markdown"
@@ -32,12 +30,9 @@ func RenderMarkup(ctx *context.Base, ctxRepo *context.Repository, mode, text, ur
 	// and the urlPathContext is "/gitea/owner/repo/src/branch/features/feat-123/doc"

 	if mode == "" || mode == "markdown" {
-		// raw Markdown doesn't need any special handling
-		baseLink := urlPathContext
-		if baseLink == "" {
-			baseLink = fmt.Sprintf("%s%s", httplib.GuessCurrentHostURL(ctx), urlPathContext)
-		}
-		rctx := renderhelper.NewRenderContextSimpleDocument(ctx, baseLink).WithUseAbsoluteLink(true).
+		// raw Markdown doesn't do any special handling
+		// TODO: raw markdown doesn't do any link processing, so "urlPathContext" doesn't take effect
+		rctx := renderhelper.NewRenderContextSimpleDocument(ctx, urlPathContext).WithUseAbsoluteLink(true).
 			WithMarkupType(markdown.MarkupName)
 		if err := markdown.RenderRaw(rctx, strings.NewReader(text), ctx.Resp); err != nil {
 			log.Error("RenderMarkupRaw: %v", err)
--- a/routers/web/org/mention.go
+++ b/routers/web/org/mention.go
@@ -0,0 +1,42 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package org
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models/organization"
+	"code.gitea.io/gitea/modules/util"
+	shared_mention "code.gitea.io/gitea/routers/web/shared/mention"
+	"code.gitea.io/gitea/services/context"
+)
+
+// GetMentionsInOwner returns JSON data for mention autocomplete on owner-level pages.
+func GetMentionsInOwner(ctx *context.Context) {
+	// for individual users, we don't have a concept of "mentionable" users or teams, so just return an empty list
+	if !ctx.ContextUser.IsOrganization() {
+		ctx.JSON(http.StatusOK, []shared_mention.Mention{})
+		return
+	}
+
+	// for org, return members and teams
+	c := shared_mention.NewCollector()
+	org := organization.OrgFromUser(ctx.ContextUser)
+
+	// Get org members
+	members, _, err := org.GetMembers(ctx, ctx.Doer)
+	if err != nil {
+		ctx.ServerError("GetMembers", err)
+		return
+	}
+	c.AddUsers(ctx, members)
+
+	// Get mentionable teams
+	if err := c.AddMentionableTeams(ctx, ctx.Doer, ctx.ContextUser); err != nil {
+		ctx.ServerError("AddMentionableTeams", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, util.SliceNilAsEmpty(c.Result))
+}
--- a/routers/web/repo/issue.go
+++ b/routers/web/repo/issue.go
@@ -14,7 +14,6 @@ import (

 	"code.gitea.io/gitea/models/db"
 	issues_model "code.gitea.io/gitea/models/issues"
-	"code.gitea.io/gitea/models/organization"
 	access_model "code.gitea.io/gitea/models/perm/access"
 	project_model "code.gitea.io/gitea/models/project"
 	"code.gitea.io/gitea/models/renderhelper"
@@ -649,47 +648,3 @@ func attachmentsHTML(ctx *context.Context, attachments []*repo_model.Attachment,
 	}
 	return attachHTML
 }
-
-// handleMentionableAssigneesAndTeams gets all teams that current user can mention, and fills the assignee users to the context data
-func handleMentionableAssigneesAndTeams(ctx *context.Context, assignees []*user_model.User) {
-	// TODO: need to figure out how many places this is really used, and rename it to "MentionableAssignees"
-	// at the moment it is used on the issue list page, for the markdown editor mention
-	ctx.Data["Assignees"] = assignees
-
-	if ctx.Doer == nil || !ctx.Repo.Owner.IsOrganization() {
-		return
-	}
-
-	var isAdmin bool
-	var err error
-	var teams []*organization.Team
-	org := organization.OrgFromUser(ctx.Repo.Owner)
-	// Admin has super access.
-	if ctx.Doer.IsAdmin {
-		isAdmin = true
-	} else {
-		isAdmin, err = org.IsOwnedBy(ctx, ctx.Doer.ID)
-		if err != nil {
-			ctx.ServerError("IsOwnedBy", err)
-			return
-		}
-	}
-
-	if isAdmin {
-		teams, err = org.LoadTeams(ctx)
-		if err != nil {
-			ctx.ServerError("LoadTeams", err)
-			return
-		}
-	} else {
-		teams, err = org.GetUserTeams(ctx, ctx.Doer.ID)
-		if err != nil {
-			ctx.ServerError("GetUserTeams", err)
-			return
-		}
-	}
-
-	ctx.Data["MentionableTeams"] = teams
-	ctx.Data["MentionableTeamsOrg"] = ctx.Repo.Owner.Name
-	ctx.Data["MentionableTeamsOrgAvatar"] = ctx.Repo.Owner.AvatarLink(ctx)
-}
--- a/routers/web/repo/issue_list.go
+++ b/routers/web/repo/issue_list.go
@@ -662,10 +662,7 @@ func prepareIssueFilterAndList(ctx *context.Context, milestoneID, projectID int6
 		ctx.ServerError("GetRepoAssignees", err)
 		return
 	}
-	handleMentionableAssigneesAndTeams(ctx, shared_user.MakeSelfOnTop(ctx.Doer, assigneeUsers))
-	if ctx.Written() {
-		return
-	}
+	ctx.Data["Assignees"] = shared_user.MakeSelfOnTop(ctx.Doer, assigneeUsers)

 	ctx.Data["IssueRefEndNames"], ctx.Data["IssueRefURLs"] = issue_service.GetRefEndNamesAndURLs(issues, ctx.Repo.RepoLink)

--- a/routers/web/repo/issue_page_meta.go
+++ b/routers/web/repo/issue_page_meta.go
@@ -155,8 +155,7 @@ func (d *IssuePageMetaData) retrieveAssigneesData(ctx *context.Context) {
 		}
 		d.AssigneesData.SelectedAssigneeIDs = strings.Join(ids, ",")
 	}
-	// FIXME: this is a tricky part which writes ctx.Data["Mentionable*"]
-	handleMentionableAssigneesAndTeams(ctx, d.AssigneesData.CandidateAssignees)
+	ctx.Data["Assignees"] = d.AssigneesData.CandidateAssignees
 }

 func (d *IssuePageMetaData) retrieveProjectsDataForIssueWriter(ctx *context.Context) {
--- a/routers/web/repo/mention.go
+++ b/routers/web/repo/mention.go
@@ -0,0 +1,59 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"errors"
+	"net/http"
+
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/util"
+	shared_mention "code.gitea.io/gitea/routers/web/shared/mention"
+	"code.gitea.io/gitea/services/context"
+)
+
+// GetMentionsInRepo returns JSON data for mention autocomplete (assignees, participants, mentionable teams).
+func GetMentionsInRepo(ctx *context.Context) {
+	c := shared_mention.NewCollector()
+
+	// Get participants if issue_index is provided
+	if issueIndex := ctx.FormInt64("issue_index"); issueIndex > 0 {
+		issue, err := issues_model.GetIssueByIndex(ctx, ctx.Repo.Repository.ID, issueIndex)
+		if err != nil && !errors.Is(err, util.ErrNotExist) {
+			ctx.ServerError("GetIssueByIndex", err)
+			return
+		}
+		if issue != nil {
+			userIDs, err := issue.GetParticipantIDsByIssue(ctx)
+			if err != nil {
+				ctx.ServerError("GetParticipantIDsByIssue", err)
+				return
+			}
+			users, err := user_model.GetUsersByIDs(ctx, userIDs)
+			if err != nil {
+				ctx.ServerError("GetUsersByIDs", err)
+				return
+			}
+			c.AddUsers(ctx, users)
+		}
+	}
+
+	// Get repo assignees
+	assignees, err := repo_model.GetRepoAssignees(ctx, ctx.Repo.Repository)
+	if err != nil {
+		ctx.ServerError("GetRepoAssignees", err)
+		return
+	}
+	c.AddUsers(ctx, assignees)
+
+	// Get mentionable teams for org repos
+	if err := c.AddMentionableTeams(ctx, ctx.Doer, ctx.Repo.Owner); err != nil {
+		ctx.ServerError("AddMentionableTeams", err)
+		return
+	}
+
+	ctx.JSON(http.StatusOK, util.SliceNilAsEmpty(c.Result))
+}
--- a/routers/web/repo/pull.go
+++ b/routers/web/repo/pull.go
@@ -913,10 +913,7 @@ func viewPullFiles(ctx *context.Context, beforeCommitID, afterCommitID string) {
 		ctx.ServerError("GetRepoAssignees", err)
 		return
 	}
-	handleMentionableAssigneesAndTeams(ctx, shared_user.MakeSelfOnTop(ctx.Doer, assigneeUsers))
-	if ctx.Written() {
-		return
-	}
+	ctx.Data["Assignees"] = shared_user.MakeSelfOnTop(ctx.Doer, assigneeUsers)

 	currentReview, err := issues_model.GetCurrentReview(ctx, ctx.Doer, issue)
 	if err != nil && !issues_model.IsErrReviewNotExist(err) {
--- a/routers/web/shared/mention/mention.go
+++ b/routers/web/shared/mention/mention.go
@@ -0,0 +1,89 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package mention
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/models/organization"
+	user_model "code.gitea.io/gitea/models/user"
+)
+
+// Mention is the JSON structure returned by mention autocomplete endpoints.
+type Mention struct {
+	Key      string `json:"key"`
+	Value    string `json:"value"`
+	Name     string `json:"name"`
+	FullName string `json:"fullname"`
+	Avatar   string `json:"avatar"`
+}
+
+// Collector builds a deduplicated list of Mention entries.
+type Collector struct {
+	seen   map[string]bool
+	Result []Mention
+}
+
+// NewCollector creates a new Collector.
+func NewCollector() *Collector {
+	return &Collector{seen: make(map[string]bool)}
+}
+
+// AddUsers adds user mentions, skipping duplicates.
+func (c *Collector) AddUsers(ctx context.Context, users []*user_model.User) {
+	for _, u := range users {
+		if !c.seen[u.Name] {
+			c.seen[u.Name] = true
+			c.Result = append(c.Result, Mention{
+				Key:      u.Name + " " + u.FullName,
+				Value:    u.Name,
+				Name:     u.Name,
+				FullName: u.FullName,
+				Avatar:   u.AvatarLink(ctx),
+			})
+		}
+	}
+}
+
+// AddMentionableTeams loads and adds team mentions for the given owner (if it's an org).
+func (c *Collector) AddMentionableTeams(ctx context.Context, doer, owner *user_model.User) error {
+	if doer == nil || !owner.IsOrganization() {
+		return nil
+	}
+
+	org := organization.OrgFromUser(owner)
+	isAdmin := doer.IsAdmin
+	if !isAdmin {
+		var err error
+		isAdmin, err = org.IsOwnedBy(ctx, doer.ID)
+		if err != nil {
+			return err
+		}
+	}
+
+	var teams []*organization.Team
+	var err error
+	if isAdmin {
+		teams, err = org.LoadTeams(ctx)
+	} else {
+		teams, err = org.GetUserTeams(ctx, doer.ID)
+	}
+	if err != nil {
+		return err
+	}
+
+	for _, team := range teams {
+		key := owner.Name + "/" + team.Name
+		if !c.seen[key] {
+			c.seen[key] = true
+			c.Result = append(c.Result, Mention{
+				Key:    key,
+				Value:  key,
+				Name:   key,
+				Avatar: owner.AvatarLink(ctx),
+			})
+		}
+	}
+	return nil
+}
--- a/routers/web/web.go
+++ b/routers/web/web.go
@@ -835,6 +835,7 @@ func registerWebRoutes(m *web.Router) {

 	// the legacy names "reqRepoXxx" should be renamed to the correct name "reqUnitXxx", these permissions are for units, not repos
 	reqUnitsWithMarkdown := context.RequireUnitReader(unit.TypeCode, unit.TypeIssues, unit.TypePullRequests, unit.TypeReleases, unit.TypeWiki)
+	reqUnitsWithMentions := context.RequireUnitReader(unit.TypeIssues, unit.TypePullRequests, unit.TypeReleases, unit.TypeWiki, unit.TypeProjects)
 	reqUnitCodeReader := context.RequireUnitReader(unit.TypeCode)
 	reqUnitIssuesReader := context.RequireUnitReader(unit.TypeIssues)
 	reqUnitPullsReader := context.RequireUnitReader(unit.TypePullRequests)
@@ -1025,6 +1026,9 @@ func registerWebRoutes(m *web.Router) {
 			}, context.PackageAssignment(), reqPackageAccess(perm.AccessModeRead))
 		}

+		// at the moment, only editing "owner-level projects" need to "mention", maybe in the future we can relax the permission check
+		m.Get("/mentions-in-owner", reqUnitAccess(unit.TypeProjects, perm.AccessModeWrite, true), org.GetMentionsInOwner)
+
 		m.Get("/repositories", org.Repositories)
 		m.Get("/heatmap", user.DashboardHeatmap)

@@ -1074,6 +1078,11 @@ func registerWebRoutes(m *web.Router) {
 	}, optSignIn, context.RepoAssignment, reqUnitCodeReader)
 	// end "/{username}/{reponame}/-": migrate

+	m.Group("/{username}/{reponame}/-", func() {
+		m.Get("/mentions-in-repo", repo.GetMentionsInRepo)
+	}, optSignIn, context.RepoAssignment, reqUnitsWithMentions)
+	// end "/{username}/{reponame}/-": mentions
+
 	m.Group("/{username}/{reponame}/settings", func() {
 		m.Group("", func() {
 			m.Combo("").Get(repo_setting.Settings).
--- a/services/context/context.go
+++ b/services/context/context.go
@@ -105,6 +105,7 @@ func NewTemplateContextForWeb(ctx reqctx.RequestContext, req *http.Request, loca
 	tmplCtx["Locale"] = locale
 	tmplCtx["AvatarUtils"] = templates.NewAvatarUtils(ctx)
 	tmplCtx["RenderUtils"] = templates.NewRenderUtils(ctx)
+	tmplCtx["MiscUtils"] = templates.NewMiscUtils(ctx)
 	tmplCtx["RootData"] = ctx.GetData()
 	tmplCtx["Consts"] = map[string]any{
 		"RepoUnitTypeCode":            unit.TypeCode,
--- a/templates/base/head_script.tmpl
+++ b/templates/base/head_script.tmpl
@@ -16,21 +16,6 @@ If you introduce mistakes in it, Gitea JavaScript code wouldn't run correctly.
 		pageData: {{.PageData}},
 		notificationSettings: {{NotificationSettings}}, {{/*a map provided by NewFuncMap in helper.go*/}}
 		enableTimeTracking: {{EnableTimetracking}},
-		{{if or .Participants .Assignees .MentionableTeams}}
-		mentionValues: Array.from(new Map([
-			{{- range .Participants -}}
-				['{{.Name}}', {key: '{{.Name}} {{.FullName}}', value: '{{.Name}}', name: '{{.Name}}', fullname: '{{.FullName}}', avatar: '{{.AvatarLink ctx}}'}],
-			{{- end -}}
-			{{- range .Assignees -}}
-				['{{.Name}}', {key: '{{.Name}} {{.FullName}}', value: '{{.Name}}', name: '{{.Name}}', fullname: '{{.FullName}}', avatar: '{{.AvatarLink ctx}}'}],
-			{{- end -}}
-			{{- range .MentionableTeams -}}
-				['{{$.MentionableTeamsOrg}}/{{.Name}}', {key: '{{$.MentionableTeamsOrg}}/{{.Name}}', value: '{{$.MentionableTeamsOrg}}/{{.Name}}', name: '{{$.MentionableTeamsOrg}}/{{.Name}}', avatar: '{{$.MentionableTeamsOrgAvatar}}'}],
-			{{- end -}}
-		]).values()),
-		{{else}}
-		mentionValues: [],
-		{{end}}
 		mermaidMaxSourceCharacters: {{MermaidMaxSourceCharacters}},
 		{{/* this global i18n object should only contain general texts. for specialized texts, it should be provided inside the related modules by: (1) API response (2) HTML data-attribute (3) PageData */}}
 		i18n: {
--- a/templates/devtest/gitea-ui.tmpl
+++ b/templates/devtest/gitea-ui.tmpl
@@ -184,7 +184,7 @@

 	<div>
 		<h1>ComboMarkdownEditor</h1>
-		{{template "shared/combomarkdowneditor" dict "MarkdownPreviewContext" "/owner/path"}}
+		{{template "shared/combomarkdowneditor" dict "MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorGeneral nil)}}
 	</div>

 	<h1>Tailwind CSS Demo</h1>
--- a/templates/projects/new.tmpl
+++ b/templates/projects/new.tmpl
@@ -18,11 +18,10 @@
 		<div class="field">
 			<label>{{ctx.Locale.Tr "repo.projects.description"}}</label>
 			{{/* TODO: repo-level project and org-level project have different behaviors to render */}}
-			{{/* the "Repository" is nil when the project is org-level */}}
+			{{/* "Repository" is nil when the project is owner-level, "Org" can be nil when owner is indivdual user */}}
+			{{$markdownEditorContext := or (ctx.MiscUtils.MarkdownEditorComment $.Repository) (ctx.MiscUtils.MarkdownEditorGeneral $.ContextUser)}}
 			{{template "shared/combomarkdowneditor" (dict
-				"MarkdownPreviewInRepo" $.Repository
-				"MarkdownPreviewContext" (Iif $.Repository "" .HomeLink)
-				"MarkdownPreviewMode" (Iif $.Repository "comment")
+				"MarkdownEditorContext" $markdownEditorContext
 				"TextareaName" "content"
 				"TextareaContent" .content
 				"TextareaPlaceholder" (ctx.Locale.Tr "repo.projects.description_placeholder")
--- a/templates/repo/diff/box.tmpl
+++ b/templates/repo/diff/box.tmpl
@@ -227,8 +227,7 @@
 				<div class="field">
 				{{template "shared/combomarkdowneditor" (dict
 					"CustomInit" true
-					"MarkdownPreviewInRepo" $.Repository
-					"MarkdownPreviewMode" "comment"
+					"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 					"TextareaName" "content"
 					"DropzoneParentContainer" ".ui.form"
 				)}}
--- a/templates/repo/diff/comment_form.tmpl
+++ b/templates/repo/diff/comment_form.tmpl
@@ -1,4 +1,4 @@
-{{if and $.root.SignedUserID (not $.Repository.IsArchived)}}
+{{if and ctx.RootData.SignedUserID (not ctx.RootData.Repository.IsArchived)}}
 	<form class="ui form {{if $.hidden}}tw-hidden comment-form{{end}}" action="{{$.root.Issue.Link}}/files/reviews/comments" method="post">
 		<input type="hidden" name="origin" value="{{if $.root.PageIsPullFiles}}diff{{else}}timeline{{end}}">
 		<input type="hidden" name="latest_commit_id" value="{{$.root.AfterCommitID}}">
@@ -11,8 +11,7 @@
 		<div class="field">
 		{{template "shared/combomarkdowneditor" (dict
 			"CustomInit" true
-			"MarkdownPreviewInRepo" $.root.Repository
-			"MarkdownPreviewMode" "comment"
+			"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment ctx.RootData.Repository)
 			"TextareaName" "content"
 			"TextareaPlaceholder" (ctx.Locale.Tr "repo.diff.comment.placeholder")
 			"DropzoneParentContainer" "form"
--- a/templates/repo/diff/new_review.tmpl
+++ b/templates/repo/diff/new_review.tmpl
@@ -19,8 +19,7 @@
 			</div>
 			<div class="field">
 				{{template "shared/combomarkdowneditor" (dict
-					"MarkdownPreviewInRepo" $.Repository
-					"MarkdownPreviewMode" "comment"
+					"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 					"TextareaName" "content"
 					"TextareaPlaceholder" (ctx.Locale.Tr "repo.diff.review.placeholder")
 					"DropzoneParentContainer" "form"
--- a/templates/repo/issue/comment_tab.tmpl
+++ b/templates/repo/issue/comment_tab.tmpl
@@ -6,8 +6,7 @@
 <div class="field">
 	{{template "shared/combomarkdowneditor" (dict
 		"CustomInit" true
-		"MarkdownPreviewInRepo" $.Repository
-		"MarkdownPreviewMode" "comment"
+		"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 		"TextareaName" "content"
 		"TextareaContent" $textareaContent
 		"TextareaPlaceholder" (ctx.Locale.Tr "repo.diff.comment.placeholder")
--- a/templates/repo/issue/fields/textarea.tmpl
+++ b/templates/repo/issue/fields/textarea.tmpl
@@ -9,8 +9,7 @@
 		{{template "shared/combomarkdowneditor" (dict
 			"CustomInit" true
 			"ContainerClasses" "tw-hidden"
-			"MarkdownPreviewInRepo" $.root.Repository
-			"MarkdownPreviewMode" "comment"
+			"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment ctx.RootData.Repository)
 			"TextareaContent" .item.Attributes.value
 			"TextareaPlaceholder" .item.Attributes.placeholder
 			"DropzoneParentContainer" ".combo-editor-dropzone"
--- a/templates/repo/issue/milestone_new.tmpl
+++ b/templates/repo/issue/milestone_new.tmpl
@@ -36,8 +36,7 @@
 				<div class="field">
 					<label>{{ctx.Locale.Tr "repo.milestones.desc"}}</label>
 					{{template "shared/combomarkdowneditor" (dict
-						"MarkdownPreviewInRepo" $.Repository
-						"MarkdownPreviewMode" "comment"
+						"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 						"TextareaName" "content"
 						"TextareaContent" .content
 						"TextareaPlaceholder" (ctx.Locale.Tr "repo.milestones.desc")
--- a/templates/repo/issue/view_content.tmpl
+++ b/templates/repo/issue/view_content.tmpl
@@ -147,8 +147,7 @@
 		<div class="field">
 			{{template "shared/combomarkdowneditor" (dict
 				"CustomInit" true
-				"MarkdownPreviewInRepo" $.Repository
-				"MarkdownPreviewMode" "comment"
+				"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 				"TextareaName" "content"
 				"DropzoneParentContainer" ".ui.form"
 			)}}
--- a/templates/repo/release/new.tmpl
+++ b/templates/repo/release/new.tmpl
@@ -69,8 +69,7 @@
 			</div>
 			<div class="field">
 				{{template "shared/combomarkdowneditor" (dict
-					"MarkdownPreviewInRepo" $.Repository
-					"MarkdownPreviewMode" "comment"
+					"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorComment $.Repository)
 					"TextareaName" "content"
 					"TextareaContent" .content
 					"TextareaPlaceholder" (ctx.Locale.Tr "repo.release.message")
--- a/templates/repo/wiki/new.tmpl
+++ b/templates/repo/wiki/new.tmpl
@@ -23,8 +23,7 @@
 			{{end}}
 			{{template "shared/combomarkdowneditor" (dict
 				"CustomInit" true
-				"MarkdownPreviewInRepo" $.Repository
-				"MarkdownPreviewMode" "wiki"
+				"MarkdownEditorContext" (ctx.MiscUtils.MarkdownEditorWiki $.Repository)
 				"TextareaName" "content"
 				"TextareaContent" $content
 				"TextareaPlaceholder" (ctx.Locale.Tr "repo.wiki.page_content")
--- a/templates/shared/combomarkdowneditor.tmpl
+++ b/templates/shared/combomarkdowneditor.tmpl
@@ -2,9 +2,7 @@
 * CustomInit: do not initialize the editor automatically
 * ContainerId: id attribute for the container element
 * ContainerClasses: additional classes for the container element
-* MarkdownPreviewInRepo: the repo to preview markdown
-* MarkdownPreviewContext: preview context (the related url path when rendering) for the preview tab, eg: repo link or user home link
-* MarkdownPreviewMode: content mode for the editor, eg: wiki, comment or default, can be disabled by "none"
+* MarkdownEditorContext: the context data for the editor, see backend MarkdownEditorContext
 * TextareaName: name attribute for the textarea
 * TextareaContent: content for the textarea
 * TextareaMaxLength: maxlength attribute for the textarea
@@ -14,20 +12,19 @@
 * DisableAutosize: whether to disable automatic height resizing
 */}}
 {{$ariaLabel := or .TextareaAriaLabel .TextareaPlaceholder}}
-{{$repo := .MarkdownPreviewInRepo}}
-{{$previewContext := .MarkdownPreviewContext}}
-{{$previewMode := .MarkdownPreviewMode}}
-{{$previewUrl := print AppSubUrl "/-/markup"}}
-{{if $repo}}
-	{{$previewUrl = print $repo.Link "/markup"}}
-{{end}}
+{{$editorContext := .MarkdownEditorContext}}
+{{$previewMode := or $editorContext.PreviewMode ""}}
+{{$previewContext := or $editorContext.PreviewContext ""}}
+{{$previewLink := or $editorContext.PreviewLink (print AppSubUrl "/-/markup")}}
+{{$mentionsLink := or $editorContext.MentionsLink ""}}
 {{$supportEasyMDE := or (eq $previewMode "comment") (eq $previewMode "wiki")}}
 <div {{if .ContainerId}}id="{{.ContainerId}}"{{end}} class="combo-markdown-editor {{if .CustomInit}}custom-init{{end}} {{.ContainerClasses}}"
 		data-dropzone-parent-container="{{.DropzoneParentContainer}}"
 		data-content-mode="{{$previewMode}}"
 		data-support-easy-mde="{{$supportEasyMDE}}"
-		data-preview-url="{{$previewUrl}}"
+		data-preview-url="{{$previewLink}}"
 		data-preview-context="{{$previewContext}}"
+		{{if $mentionsLink}}data-mentions-url="{{$mentionsLink}}"{{end}}
 >
 	{{if ne $previewMode "none"}}
 	<div class="ui top tabular menu">
@@ -58,7 +55,7 @@
 				<md-task-list class="markdown-toolbar-button" data-tooltip-content="{{ctx.Locale.Tr "editor.buttons.list.task.tooltip"}}">{{svg "octicon-tasklist"}}</md-task-list>
 				<button class="markdown-toolbar-button markdown-button-table-add" data-tooltip-content="{{ctx.Locale.Tr "editor.buttons.table.add.tooltip"}}">{{svg "octicon-table"}}</button>
 			</div>
-			{{if eq $previewMode "comment"}}
+			{{if $mentionsLink}}
 			<div class="markdown-toolbar-group">
 				<md-mention class="markdown-toolbar-button" data-tooltip-content="{{ctx.Locale.Tr "editor.buttons.mention.tooltip"}}">{{svg "octicon-mention"}}</md-mention>
 				<md-ref class="markdown-toolbar-button" data-tooltip-content="{{ctx.Locale.Tr "editor.buttons.ref.tooltip"}}">{{svg "octicon-cross-reference"}}</md-ref>
--- a/web_src/js/features/comp/TextExpander.ts
+++ b/web_src/js/features/comp/TextExpander.ts
@@ -38,6 +38,7 @@ export function initTextExpander(expander: TextExpanderElement) {
  if (!expander) return;

  const textarea = expander.querySelector<HTMLTextAreaElement>('textarea')!;
+  const mentionsUrl = expander.closest('[data-mentions-url]')?.getAttribute('data-mentions-url');

  // help to fix the text-expander "multiword+promise" bug: do not show the popup when there is no "#" before current line
  const shouldShowIssueSuggestions = () => {
@@ -83,36 +84,39 @@ export function initTextExpander(expander: TextExpanderElement) {

      provide({matched: true, fragment: ul});
    } else if (key === '@') {
-      const matches = matchMention(text);
-      if (!matches.length) return provide({matched: false});
+      provide((async (): Promise<TextExpanderResult> => {
+        if (!mentionsUrl) return {matched: false};
+        const matches = await matchMention(mentionsUrl, text);
+        if (!matches.length) return {matched: false};

-      const ul = document.createElement('ul');
-      ul.classList.add('suggestions');
-      for (const {value, name, fullname, avatar} of matches) {
-        const li = document.createElement('li');
-        li.setAttribute('role', 'option');
-        li.setAttribute('data-value', `${key}${value}`);
+        const ul = document.createElement('ul');
+        ul.classList.add('suggestions');
+        for (const {value, name, fullname, avatar} of matches) {
+          const li = document.createElement('li');
+          li.setAttribute('role', 'option');
+          li.setAttribute('data-value', `${key}${value}`);

-        const img = document.createElement('img');
-        img.src = avatar;
-        li.append(img);
+          const img = document.createElement('img');
+          img.src = avatar;
+          li.append(img);

-        const nameSpan = document.createElement('span');
-        nameSpan.classList.add('name');
-        nameSpan.textContent = name;
-        li.append(nameSpan);
+          const nameSpan = document.createElement('span');
+          nameSpan.classList.add('name');
+          nameSpan.textContent = name;
+          li.append(nameSpan);

-        if (fullname && fullname.toLowerCase() !== name) {
-          const fullnameSpan = document.createElement('span');
-          fullnameSpan.classList.add('fullname');
-          fullnameSpan.textContent = fullname;
-          li.append(fullnameSpan);
+          if (fullname && fullname.toLowerCase() !== name) {
+            const fullnameSpan = document.createElement('span');
+            fullnameSpan.classList.add('fullname');
+            fullnameSpan.textContent = fullname;
+            li.append(fullnameSpan);
+          }
+
+          ul.append(li);
        }

-        ul.append(li);
-      }
-
-      provide({matched: true, fragment: ul});
+        return {matched: true, fragment: ul};
+      })());
    } else if (key === '#') {
      provide(debouncedIssueSuggestions(key, text));
    }
--- a/web_src/js/features/tribute.ts
+++ b/web_src/js/features/tribute.ts
@@ -1,10 +1,12 @@
 import {emojiKeys, emojiHTML, emojiString} from './emoji.ts';
 import {html, htmlRaw} from '../utils/html.ts';
+import {fetchMentions} from '../utils/match.ts';
 import type {TributeCollection} from 'tributejs';
-import type {MentionValue} from '../types.ts';
+import type {Mention} from '../types.ts';

 export async function attachTribute(element: HTMLElement) {
  const {default: Tribute} = await import(/* webpackChunkName: "tribute" */'tributejs');
+  const mentionsUrl = element.closest('[data-mentions-url]')?.getAttribute('data-mentions-url');

  const emojiCollection: TributeCollection<string> = { // emojis
    trigger: ':',
@@ -29,8 +31,10 @@ export async function attachTribute(element: HTMLElement) {
    },
  };

-  const mentionCollection: TributeCollection<MentionValue> = {
-    values: window.config.mentionValues,
+  const mentionCollection: TributeCollection<Mention> = {
+    values: async (_query: string, cb: (matches: Mention[]) => void) => { // eslint-disable-line @typescript-eslint/no-misused-promises
+      cb(mentionsUrl ? await fetchMentions(mentionsUrl) : []);
+    },
    requireLeadingSpace: true,
    menuItemTemplate: (item) => {
      const fullNameHtml = item.original.fullname && item.original.fullname !== '' ? html`<span class="fullname">${item.original.fullname}</span>` : '';
--- a/web_src/js/globals.d.ts
+++ b/web_src/js/globals.d.ts
@@ -29,7 +29,6 @@ interface Window {
    pageData: Record<string, any>,
    notificationSettings: Record<string, any>,
    enableTimeTracking: boolean,
-    mentionValues: Array<import('./types.ts').MentionValue>,
    mermaidMaxSourceCharacters: number,
    i18n: Record<string, string>,
  },
--- a/web_src/js/types.ts
+++ b/web_src/js/types.ts
@@ -2,7 +2,7 @@ export type IntervalId = ReturnType<typeof setInterval>;

 export type Intent = 'error' | 'warning' | 'info';

-export type MentionValue = {
+export type Mention = {
  key: string,
  value: string,
  name: string,
--- a/web_src/js/utils/match.test.ts
+++ b/web_src/js/utils/match.test.ts
@@ -1,5 +1,20 @@
+import {GET} from '../modules/fetch.ts';
 import {matchEmoji, matchMention} from './match.ts';

+vi.mock('../modules/fetch.ts', () => ({
+  GET: vi.fn(),
+}));
+
+const testMentions = [
+  {key: 'user1 User 1', value: 'user1', name: 'user1', fullname: 'User 1', avatar: 'https://avatar1.com'},
+  {key: 'user2 User 2', value: 'user2', name: 'user2', fullname: 'User 2', avatar: 'https://avatar2.com'},
+  {key: 'org3 User 3', value: 'org3', name: 'org3', fullname: 'User 3', avatar: 'https://avatar3.com'},
+  {key: 'user4 User 4', value: 'user4', name: 'user4', fullname: 'User 4', avatar: 'https://avatar4.com'},
+  {key: 'user5 User 5', value: 'user5', name: 'user5', fullname: 'User 5', avatar: 'https://avatar5.com'},
+  {key: 'org6 User 6', value: 'org6', name: 'org6', fullname: 'User 6', avatar: 'https://avatar6.com'},
+  {key: 'org7 User 7', value: 'org7', name: 'org7', fullname: 'User 7', avatar: 'https://avatar7.com'},
+];
+
 test('matchEmoji', () => {
  expect(matchEmoji('')).toMatchInlineSnapshot(`
    [
@@ -56,7 +71,8 @@ test('matchEmoji', () => {
  `);
 });

-test('matchMention', () => {
-  expect(matchMention('')).toEqual(window.config.mentionValues.slice(0, 6));
-  expect(matchMention('user4')).toEqual([window.config.mentionValues[3]]);
+test('matchMention', async () => {
+  vi.mocked(GET).mockResolvedValue({ok: true, json: () => Promise.resolve(testMentions)} as Response);
+  expect(await matchMention('/any-mentions', '')).toEqual(testMentions.slice(0, 6));
+  expect(await matchMention('/any-mentions', 'user4')).toEqual([testMentions[3]]);
 });
--- a/web_src/js/utils/match.ts
+++ b/web_src/js/utils/match.ts
@@ -1,6 +1,8 @@
 import emojis from '../../../assets/emoji.json' with {type: 'json'};
 import {GET} from '../modules/fetch.ts';
-import type {Issue} from '../types.ts';
+import {showErrorToast} from '../modules/toast.ts';
+import {parseIssuePageInfo} from '../utils.ts';
+import type {Issue, Mention} from '../types.ts';

 const maxMatches = 6;

@@ -29,13 +31,36 @@ export function matchEmoji(queryText: string): string[] {
  return sortAndReduce(results);
 }

-type MentionSuggestion = {value: string; name: string; fullname: string; avatar: string};
-export function matchMention(queryText: string): MentionSuggestion[] {
+let cachedMentionsPromise: Promise<Mention[]> | undefined;
+let cachedMentionsUrl: string;
+
+export function fetchMentions(mentionsUrl: string): Promise<Mention[]> {
+  if (cachedMentionsPromise && cachedMentionsUrl === mentionsUrl) {
+    return cachedMentionsPromise;
+  }
+  cachedMentionsUrl = mentionsUrl;
+  cachedMentionsPromise = (async () => {
+    try {
+      const issueIndex = parseIssuePageInfo().issueNumber;
+      const query = issueIndex ? `?issue_index=${issueIndex}` : '';
+      const res = await GET(`${mentionsUrl}${query}`);
+      if (!res.ok) throw new Error(res.statusText);
+      return await res.json() as Mention[];
+    } catch (e) {
+      showErrorToast(`Failed to load mentions: ${e}`);
+      return [];
+    }
+  })();
+  return cachedMentionsPromise;
+}
+
+export async function matchMention(mentionsUrl: string, queryText: string): Promise<Mention[]> {
+  const values = await fetchMentions(mentionsUrl);
  const query = queryText.toLowerCase();

  // results is a map of weights, lower is better
-  const results = new Map<MentionSuggestion, number>();
-  for (const obj of window.config.mentionValues) {
+  const results = new Map<Mention, number>();
+  for (const obj of values) {
    const index = obj.key.toLowerCase().indexOf(query);
    if (index === -1) continue;
    const existing = results.get(obj);
--- a/web_src/js/vitest.setup.ts
+++ b/web_src/js/vitest.setup.ts
@@ -10,15 +10,6 @@ window.config = {
  pageData: {},
  notificationSettings: {},
  enableTimeTracking: true,
-  mentionValues: [
-    {key: 'user1 User 1', value: 'user1', name: 'user1', fullname: 'User 1', avatar: 'https://avatar1.com'},
-    {key: 'user2 User 2', value: 'user2', name: 'user2', fullname: 'User 2', avatar: 'https://avatar2.com'},
-    {key: 'org3 User 3', value: 'org3', name: 'org3', fullname: 'User 3', avatar: 'https://avatar3.com'},
-    {key: 'user4 User 4', value: 'user4', name: 'user4', fullname: 'User 4', avatar: 'https://avatar4.com'},
-    {key: 'user5 User 5', value: 'user5', name: 'user5', fullname: 'User 5', avatar: 'https://avatar5.com'},
-    {key: 'org6 User 6', value: 'org6', name: 'org6', fullname: 'User 6', avatar: 'https://avatar6.com'},
-    {key: 'org7 User 7', value: 'org7', name: 'org7', fullname: 'User 7', avatar: 'https://avatar7.com'},
-  ],
  mermaidMaxSourceCharacters: 5000,
  i18n: {},
 };