Show visibility status of email in own profile (#23900)

I've heard many reports of users getting scared when they see their own
email address for their own profile, as they believe that the email
field is also visible to other users. Currently, using Incognito mode
or going over the Settings is the only "reasonable" way to verify this
from the perspective of the user.

A locked padlock should be enough to indicate that the email is not
visible to anyone apart from the user and the admins. An unlocked
padlock is used if the email address is only shown to authenticated
users.

Some additional string-related changes in the Settings were introduced
as well to ensure consistency, and the comments in the relevant tests
were improved so as to allow for easier modifications in the future.

---

#### Screenshot (EDIT: Scroll down for more up-to-date screenshots)

***Please remove this section before merging.***


![image](https://user-images.githubusercontent.com/30193966/229572425-909894aa-a7d5-4bf3-92d3-23b1921dcc90.png)

This lock should only appear if the email address is explicitly hidden
using the `Hide Email Address` setting. The change was originally tested
on top of and designed for the Forgejo fork, but I don't expect any
problems to arise from this and I don't think that a
documentation-related change is strictly necessary.

---------

Co-authored-by: silverwind <me@silverwind.io>

options/locale/locale_en-US.ini

@@ -548,6 +548,8 @@ unfollow = Unfollow
 heatmap.loading = Loading Heatmap…
 user_bio = Biography
 disabled_public_activity = This user has disabled the public visibility of the activity.
+email_visibility.limited = Your email address is visible to all authenticated users
+email_visibility.private = Your email address is only visible to you and administrators
 
 form.name_reserved = The username '%s' is reserved.
 form.name_pattern_not_allowed = The pattern '%s' is not allowed in a username.
@@ -661,7 +663,7 @@ add_email_success = The new email address has been added.
 email_preference_set_success = Email preference has been set successfully.
 add_openid_success = The new OpenID address has been added.
 keep_email_private = Hide Email Address
-keep_email_private_popup = Your email address will be hidden from other users.
+keep_email_private_popup = Your email address will only be visible to you and the administrators
 openid_desc = OpenID lets you delegate authentication to an external provider.
 
 manage_ssh_keys = Manage SSH Keys
@@ -842,9 +844,9 @@ email_notifications.andyourown = And Your Own Notifications
 
 visibility = User visibility
 visibility.public = Public
-visibility.public_tooltip = Visible to all users
+visibility.public_tooltip = Visible to everyone
 visibility.limited = Limited
-visibility.limited_tooltip = Visible to logged in users only
+visibility.limited_tooltip = Visible to authenticated users only
 visibility.private = Private
 visibility.private_tooltip = Visible only to organization members
 
@@ -2421,7 +2423,7 @@ settings.permission = Permissions
 settings.repoadminchangeteam = Repository admin can add and remove access for teams
 settings.visibility = Visibility
 settings.visibility.public = Public
-settings.visibility.limited = Limited (Visible to logged in users only)
+settings.visibility.limited = Limited (Visible to authenticated users only)
 settings.visibility.limited_shortname = Limited
 settings.visibility.private = Private (Visible only to organization members)
 settings.visibility.private_shortname = Private

templates/user/profile.tmpl

@@ -30,11 +30,29 @@
 							{{if .Owner.Location}}
 								<li>{{svg "octicon-location"}} {{.Owner.Location}}</li>
 							{{end}}
-							{{if .ShowUserEmail}}
+							{{if (eq .SignedUserName .Owner.Name)}}
 								<li>
 									{{svg "octicon-mail"}}
 									<a href="mailto:{{.Owner.Email}}" rel="nofollow">{{.Owner.Email}}</a>
+									<a href="{{AppSubUrl}}/user/settings#keep-email-private">
+										{{if .ShowUserEmail}}
+											<i class="ui right" data-tooltip-content="{{.locale.Tr "user.email_visibility.limited"}}">
+												{{svg "octicon-unlock"}}
+											</i>
+										{{else}}
+											<i class="ui right" data-tooltip-content="{{.locale.Tr "user.email_visibility.private"}}">
+												{{svg "octicon-lock"}}
+											</i>
+										{{end}}
+									</a>
 								</li>
+							{{else}}
+								{{if .ShowUserEmail}}
+									<li>
+										{{svg "octicon-mail"}}
+										<a href="mailto:{{.Owner.Email}}" rel="nofollow">{{.Owner.Email}}</a>
+									</li>
+								{{end}}
 							{{end}}
 							{{if .Owner.Website}}
 								<li>

tests/integration/setting_test.go

@@ -50,42 +50,42 @@ func TestSettingShowUserEmailProfile(t *testing.T) {
 
 	setting.UI.ShowUserEmail = true
 
-	// user1 can see self
+	// user1 can see own visible email
 	session := loginUser(t, "user1")
 	req := NewRequest(t, "GET", "/user1")
 	resp := session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc := NewHTMLParser(t, resp.Body)
 	assert.Contains(t, htmlDoc.doc.Find(".user.profile").Text(), "user1@example.com")
 
-	// user1 can not see user2
+	// user1 can not see user2's hidden email
 	req = NewRequest(t, "GET", "/user2")
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc = NewHTMLParser(t, resp.Body)
-	// Should not contain even if the user visits their own profile page
+	// Should only contain if the user visits their own profile page
 	assert.NotContains(t, htmlDoc.doc.Find(".user.profile").Text(), "user2@example.com")
 
-	// user2 can see user1
+	// user2 can see user1's visible email
 	session = loginUser(t, "user2")
 	req = NewRequest(t, "GET", "/user1")
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc = NewHTMLParser(t, resp.Body)
 	assert.Contains(t, htmlDoc.doc.Find(".user.profile").Text(), "user1@example.com")
 
-	// user2 can not see self
+	// user2 can see own hidden email
 	session = loginUser(t, "user2")
 	req = NewRequest(t, "GET", "/user2")
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc = NewHTMLParser(t, resp.Body)
-	assert.NotContains(t, htmlDoc.doc.Find(".user.profile").Text(), "user2@example.com")
+	assert.Contains(t, htmlDoc.doc.Find(".user.profile").Text(), "user2@example.com")
 
 	setting.UI.ShowUserEmail = false
 
-	// user1 can not see self
+	// user1 can see own (now hidden) email
 	session = loginUser(t, "user1")
 	req = NewRequest(t, "GET", "/user1")
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	htmlDoc = NewHTMLParser(t, resp.Body)
-	assert.NotContains(t, htmlDoc.doc.Find(".user.profile").Text(), "user1@example.com")
+	assert.Contains(t, htmlDoc.doc.Find(".user.profile").Text(), "user1@example.com")
 
 	setting.UI.ShowUserEmail = showUserEmail
 }