Fix broken following organization (go-gitea#29005)

- following organization is broken from go-gitea#28908
- add login check for the follow button in organization profile page

routers/web/user/profile.go

@@ -29,6 +29,7 @@ import (
 
 const (
 	tplProfileBigAvatar base.TplName = "shared/user/profile_big_avatar"
+	tplFollowUnfollow   base.TplName = "shared/user/follow_unfollow"
 )
 
 // OwnerProfile render profile page for a user or a organization (aka, repo owner)
@@ -318,6 +319,15 @@ func Action(ctx *context.Context) {
 		return
 	}
 
-	shared_user.PrepareContextForProfileBigAvatar(ctx)
-	ctx.HTML(http.StatusOK, tplProfileBigAvatar)
+	if ctx.ContextUser.IsIndividual() {
+		shared_user.PrepareContextForProfileBigAvatar(ctx)
+		ctx.HTML(http.StatusOK, tplProfileBigAvatar)
+		return
+	} else if ctx.ContextUser.IsOrganization() {
+		ctx.Data["IsFollowing"] = ctx.Doer != nil && user_model.IsFollowing(ctx, ctx.Doer.ID, ctx.ContextUser.ID)
+		ctx.HTML(http.StatusOK, tplFollowUnfollow)
+		return
+	}
+	log.Error("Failed to apply action %q: unsupport context user type: %s", ctx.FormString("action"), ctx.ContextUser.Type)
+	ctx.Error(http.StatusBadRequest, fmt.Sprintf("Action %q failed", ctx.FormString("action")))
 }

templates/org/home.tmpl

@@ -25,13 +25,15 @@
 				{{svg "octicon-rss" 24}}
 			</a>
 			{{end}}
-			<button class="link-action ui basic button gt-mr-0" data-url="{{.Org.HomeLink}}?action={{if $.IsFollowing}}unfollow{{else}}follow{{end}}">
-				{{if $.IsFollowing}}
-					{{ctx.Locale.Tr "user.unfollow"}}
-				{{else}}
-					{{ctx.Locale.Tr "user.follow"}}
-				{{end}}
-			</button>
+			{{if .IsSigned}}
+				<button class="ui basic button gt-mr-0" hx-post="{{.Org.HomeLink}}?action={{if $.IsFollowing}}unfollow{{else}}follow{{end}}">
+					{{if $.IsFollowing}}
+						{{ctx.Locale.Tr "user.unfollow"}}
+					{{else}}
+						{{ctx.Locale.Tr "user.follow"}}
+					{{end}}
+				</button>
+			{{end}}
 		</div>
 	</div>