Admin page for managing user e-mail activation (#10557)

* Implement mail activation admin panel

* Add export comments

* Fix another export comment

* again...

* And again!

* Apply suggestions by @lunny

* Add UI for user activated emails

* Make new activation UI work

* Fix lint

* Prevent admin from self-deactivate; add modal

Co-authored-by: zeripath <art27@cantab.net>

4 files changed, 232 insertions, 2 deletions

diff --git a/routers/admin/emails.go b/routers/admin/emails.go
new file mode 100644
index 0000000000..f0b14ce5e5
--- /dev/null
+++ b/routers/admin/emails.go
@@ -0,0 +1,157 @@
+// Copyright 2020 The Gitea Authors.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package admin
+
+import (
+	"bytes"
+	"net/url"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+
+	"github.com/unknwon/com"
+)
+
+const (
+	tplEmails base.TplName = "admin/emails/list"
+)
+
+// Emails show all emails
+func Emails(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("admin.emails")
+	ctx.Data["PageIsAdmin"] = true
+	ctx.Data["PageIsAdminEmails"] = true
+
+	opts := &models.SearchEmailOptions{
+		ListOptions: models.ListOptions{
+			PageSize: setting.UI.Admin.UserPagingNum,
+			Page:     ctx.QueryInt("page"),
+		},
+	}
+
+	if opts.Page <= 1 {
+		opts.Page = 1
+	}
+
+	type ActiveEmail struct {
+		models.SearchEmailResult
+		CanChange bool
+	}
+
+	var (
+		baseEmails []*models.SearchEmailResult
+		emails     []ActiveEmail
+		count      int64
+		err        error
+		orderBy    models.SearchEmailOrderBy
+	)
+
+	ctx.Data["SortType"] = ctx.Query("sort")
+	switch ctx.Query("sort") {
+	case "email":
+		orderBy = models.SearchEmailOrderByEmail
+	case "reverseemail":
+		orderBy = models.SearchEmailOrderByEmailReverse
+	case "username":
+		orderBy = models.SearchEmailOrderByName
+	case "reverseusername":
+		orderBy = models.SearchEmailOrderByNameReverse
+	default:
+		ctx.Data["SortType"] = "email"
+		orderBy = models.SearchEmailOrderByEmail
+	}
+
+	opts.Keyword = ctx.QueryTrim("q")
+	opts.SortType = orderBy
+	if len(ctx.Query("is_activated")) != 0 {
+		opts.IsActivated = util.OptionalBoolOf(ctx.QueryBool("activated"))
+	}
+	if len(ctx.Query("is_primary")) != 0 {
+		opts.IsPrimary = util.OptionalBoolOf(ctx.QueryBool("primary"))
+	}
+
+	if len(opts.Keyword) == 0 || isKeywordValid(opts.Keyword) {
+		baseEmails, count, err = models.SearchEmails(opts)
+		if err != nil {
+			ctx.ServerError("SearchEmails", err)
+			return
+		}
+		emails = make([]ActiveEmail, len(baseEmails))
+		for i := range baseEmails {
+			emails[i].SearchEmailResult = *baseEmails[i]
+			// Don't let the admin deactivate its own primary email address
+			// We already know the user is admin
+			emails[i].CanChange = ctx.User.ID != emails[i].UID || !emails[i].IsPrimary
+		}
+	}
+	ctx.Data["Keyword"] = opts.Keyword
+	ctx.Data["Total"] = count
+	ctx.Data["Emails"] = emails
+
+	pager := context.NewPagination(int(count), opts.PageSize, opts.Page, 5)
+	pager.SetDefaultParams(ctx)
+	ctx.Data["Page"] = pager
+
+	ctx.HTML(200, tplEmails)
+}
+
+var (
+	nullByte = []byte{0x00}
+)
+
+func isKeywordValid(keyword string) bool {
+	return !bytes.Contains([]byte(keyword), nullByte)
+}
+
+// ActivateEmail serves a POST request for activating/deactivating a user's email
+func ActivateEmail(ctx *context.Context) {
+
+	truefalse := map[string]bool{"1": true, "0": false}
+
+	uid := com.StrTo(ctx.Query("uid")).MustInt64()
+	email := ctx.Query("email")
+	primary, okp := truefalse[ctx.Query("primary")]
+	activate, oka := truefalse[ctx.Query("activate")]
+
+	if uid == 0 || len(email) == 0 || !okp || !oka {
+		ctx.Error(400)
+		return
+	}
+
+	log.Info("Changing activation for User ID: %d, email: %s, primary: %v to %v", uid, email, primary, activate)
+
+	if err := models.ActivateUserEmail(uid, email, primary, activate); err != nil {
+		log.Error("ActivateUserEmail(%v,%v,%v,%v): %v", uid, email, primary, activate, err)
+		if models.IsErrEmailAlreadyUsed(err) {
+			ctx.Flash.Error(ctx.Tr("admin.emails.duplicate_active"))
+		} else {
+			ctx.Flash.Error(ctx.Tr("admin.emails.not_updated", err))
+		}
+	} else {
+		log.Info("Activation for User ID: %d, email: %s, primary: %v changed to %v", uid, email, primary, activate)
+		ctx.Flash.Info(ctx.Tr("admin.emails.updated"))
+	}
+
+	redirect, _ := url.Parse(setting.AppSubURL + "/admin/emails")
+	q := url.Values{}
+	if val := ctx.QueryTrim("q"); len(val) > 0 {
+		q.Set("q", val)
+	}
+	if val := ctx.QueryTrim("sort"); len(val) > 0 {
+		q.Set("sort", val)
+	}
+	if val := ctx.QueryTrim("is_primary"); len(val) > 0 {
+		q.Set("is_primary", val)
+	}
+	if val := ctx.QueryTrim("is_activated"); len(val) > 0 {
+		q.Set("is_activated", val)
+	}
+	redirect.RawQuery = q.Encode()
+	ctx.Redirect(redirect.String())
+}
diff --git a/routers/routes/routes.go b/routers/routes/routes.go
index 9859ebc539..a8a08c9eca 100644
--- a/routers/routes/routes.go
+++ b/routers/routes/routes.go
@@ -444,6 +444,11 @@ func RegisterRoutes(m *macaron.Macaron) {
 			m.Post("/:userid/delete", admin.DeleteUser)
 		})
 
+		m.Group("/emails", func() {
+			m.Get("", admin.Emails)
+			m.Post("/activate", admin.ActivateEmail)
+		})
+
 		m.Group("/orgs", func() {
 			m.Get("", admin.Organizations)
 		})
diff --git a/routers/user/auth.go b/routers/user/auth.go
index 3a3e3a1a54..6d762a058c 100644
--- a/routers/user/auth.go
+++ b/routers/user/auth.go
@@ -1217,8 +1217,18 @@ func ActivateEmail(ctx *context.Context) {
 
 		log.Trace("Email activated: %s", email.Email)
 		ctx.Flash.Success(ctx.Tr("settings.add_email_success"))
+
+		if u, err := models.GetUserByID(email.UID); err != nil {
+			log.Warn("GetUserByID: %d", email.UID)
+		} else {
+			// Allow user to validate more emails
+			_ = ctx.Cache.Delete("MailResendLimit_" + u.LowerName)
+		}
 	}
 
+	// FIXME: e-mail verification does not require the user to be logged in,
+	// so this could be redirecting to the login page.
+	// Should users be logged in automatically here? (consider 2FA requirements, etc.)
 	ctx.Redirect(setting.AppSubURL + "/user/settings/account")
 }
 
diff --git a/routers/user/setting/account.go b/routers/user/setting/account.go
index a9064b0e15..3c0c64ca27 100644
--- a/routers/user/setting/account.go
+++ b/routers/user/setting/account.go
@@ -88,6 +88,51 @@ func EmailPost(ctx *context.Context, form auth.AddEmailForm) {
 		ctx.Redirect(setting.AppSubURL + "/user/settings/account")
 		return
 	}
+	// Send activation Email
+	if ctx.Query("_method") == "SENDACTIVATION" {
+		var address string
+		if ctx.Cache.IsExist("MailResendLimit_" + ctx.User.LowerName) {
+			log.Error("Send activation: activation still pending")
+			ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+			return
+		}
+		if ctx.Query("id") == "PRIMARY" {
+			if ctx.User.IsActive {
+				log.Error("Send activation: email not set for activation")
+				ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+				return
+			}
+			mailer.SendActivateAccountMail(ctx.Locale, ctx.User)
+			address = ctx.User.Email
+		} else {
+			id := ctx.QueryInt64("id")
+			email, err := models.GetEmailAddressByID(ctx.User.ID, id)
+			if err != nil {
+				log.Error("GetEmailAddressByID(%d,%d) error: %v", ctx.User.ID, id, err)
+				ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+				return
+			}
+			if email == nil {
+				log.Error("Send activation: EmailAddress not found; user:%d, id: %d", ctx.User.ID, id)
+				ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+				return
+			}
+			if email.IsActivated {
+				log.Error("Send activation: email not set for activation")
+				ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+				return
+			}
+			mailer.SendActivateEmailMail(ctx.Locale, ctx.User, email)
+			address = email.Email
+		}
+
+		if err := ctx.Cache.Put("MailResendLimit_"+ctx.User.LowerName, ctx.User.LowerName, 180); err != nil {
+			log.Error("Set cache(MailResendLimit) fail: %v", err)
+		}
+		ctx.Flash.Info(ctx.Tr("settings.add_email_confirmation_sent", address, timeutil.MinutesToFriendly(setting.Service.ActiveCodeLives, ctx.Locale.Language())))
+		ctx.Redirect(setting.AppSubURL + "/user/settings/account")
+		return
+	}
 	// Set Email Notification Preference
 	if ctx.Query("_method") == "NOTIFICATION" {
 		preference := ctx.Query("preference")
@@ -134,7 +179,6 @@ func EmailPost(ctx *context.Context, form auth.AddEmailForm) {
 	// Send confirmation email
 	if setting.Service.RegisterEmailConfirm {
 		mailer.SendActivateEmailMail(ctx.Locale, ctx.User, email)
-
 		if err := ctx.Cache.Put("MailResendLimit_"+ctx.User.LowerName, ctx.User.LowerName, 180); err != nil {
 			log.Error("Set cache(MailResendLimit) fail: %v", err)
 		}
@@ -223,11 +267,25 @@ func UpdateUIThemePost(ctx *context.Context, form auth.UpdateThemeForm) {
 }
 
 func loadAccountData(ctx *context.Context) {
-	emails, err := models.GetEmailAddresses(ctx.User.ID)
+	emlist, err := models.GetEmailAddresses(ctx.User.ID)
 	if err != nil {
 		ctx.ServerError("GetEmailAddresses", err)
 		return
 	}
+	type UserEmail struct {
+		models.EmailAddress
+		CanBePrimary bool
+	}
+	pendingActivation := ctx.Cache.IsExist("MailResendLimit_" + ctx.User.LowerName)
+	emails := make([]*UserEmail, len(emlist))
+	for i, em := range emlist {
+		var email UserEmail
+		email.EmailAddress = *em
+		email.CanBePrimary = em.IsActivated
+		emails[i] = &email
+	}
 	ctx.Data["Emails"] = emails
 	ctx.Data["EmailNotificationsPreference"] = ctx.User.EmailNotifications()
+	ctx.Data["ActivationsPending"] = pendingActivation
+	ctx.Data["CanAddEmails"] = !pendingActivation || !setting.Service.RegisterEmailConfirm
 }