Optimize user dashboard loading (#33686)

Fix #33582
Fix #31698

When a user login, the dashboard should load all feed belongs to him
with no any conditions. The complicated conditions should be applied
only for another user view this user's profile.

models/activities/action.go

@@ -454,6 +454,24 @@ func ActivityReadable(user, doer *user_model.User) bool {
 		doer != nil && (doer.IsAdmin || user.ID == doer.ID)
 }
 
+func FeedDateCond(opts GetFeedsOptions) builder.Cond {
+	cond := builder.NewCond()
+	if opts.Date == "" {
+		return cond
+	}
+
+	dateLow, err := time.ParseInLocation("2006-01-02", opts.Date, setting.DefaultUILocation)
+	if err != nil {
+		log.Warn("Unable to parse %s, filter not applied: %v", opts.Date, err)
+	} else {
+		dateHigh := dateLow.Add(86399000000000) // 23h59m59s
+
+		cond = cond.And(builder.Gte{"`action`.created_unix": dateLow.Unix()})
+		cond = cond.And(builder.Lte{"`action`.created_unix": dateHigh.Unix()})
+	}
+	return cond
+}
+
 func ActivityQueryCondition(ctx context.Context, opts GetFeedsOptions) (builder.Cond, error) {
 	cond := builder.NewCond()
 
@@ -534,17 +552,7 @@ func ActivityQueryCondition(ctx context.Context, opts GetFeedsOptions) (builder.
 		cond = cond.And(builder.Eq{"is_deleted": false})
 	}
 
-	if opts.Date != "" {
-		dateLow, err := time.ParseInLocation("2006-01-02", opts.Date, setting.DefaultUILocation)
-		if err != nil {
-			log.Warn("Unable to parse %s, filter not applied: %v", opts.Date, err)
-		} else {
-			dateHigh := dateLow.Add(86399000000000) // 23h59m59s
-
-			cond = cond.And(builder.Gte{"`action`.created_unix": dateLow.Unix()})
-			cond = cond.And(builder.Lte{"`action`.created_unix": dateHigh.Unix()})
-		}
-	}
+	cond = cond.And(FeedDateCond(opts))
 
 	return cond, nil
 }

models/activities/action_list.go

@@ -208,9 +208,31 @@ func GetFeeds(ctx context.Context, opts GetFeedsOptions) (ActionList, int64, err
 		return nil, 0, fmt.Errorf("need at least one of these filters: RequestedUser, RequestedTeam, RequestedRepo")
 	}
 
-	cond, err := ActivityQueryCondition(ctx, opts)
-	if err != nil {
-		return nil, 0, err
+	var err error
+	var cond builder.Cond
+	// if the actor is the requested user or is an administrator, we can skip the ActivityQueryCondition
+	if opts.Actor != nil && opts.RequestedUser != nil && (opts.Actor.IsAdmin || opts.Actor.ID == opts.RequestedUser.ID) {
+		cond = builder.Eq{
+			"user_id": opts.RequestedUser.ID,
+		}.And(
+			FeedDateCond(opts),
+		)
+
+		if !opts.IncludeDeleted {
+			cond = cond.And(builder.Eq{"is_deleted": false})
+		}
+
+		if !opts.IncludePrivate {
+			cond = cond.And(builder.Eq{"is_private": false})
+		}
+		if opts.OnlyPerformedBy {
+			cond = cond.And(builder.Eq{"act_user_id": opts.RequestedUser.ID})
+		}
+	} else {
+		cond, err = ActivityQueryCondition(ctx, opts)
+		if err != nil {
+			return nil, 0, err
+		}
 	}
 
 	actions := make([]*Action, 0, opts.PageSize)