chore: initial commit of ai site platform

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/internal/logic/applogic/aggregate.go

@@ -0,0 +1,91 @@
+package applogic
+
+import (
+	"fmt"
+	"strconv"
+
+	"aijianzhan/platform/internal/authx"
+	"aijianzhan/platform/internal/types"
+)
+
+func (l *CrudLogic) Aggregate(slug, resource, groupBy, sumField string) (*types.AggregateResp, error) {
+	tenantID := authx.TenantID(l.ctx)
+	ref, err := l.svcCtx.Meta.ResolveResource(l.ctx, tenantID, slug, resource)
+	if err != nil {
+		return nil, err
+	}
+	if groupBy != "" {
+		ok := false
+		if ref.Resource.List != nil {
+			for _, f := range ref.Resource.List.AllowedFilters {
+				if f == groupBy {
+					ok = true
+					break
+				}
+			}
+		}
+		for _, f := range ref.Entity.Fields {
+			if f.Name == groupBy {
+				ok = true
+				break
+			}
+		}
+		if !ok {
+			return nil, fmt.Errorf("group_by not allowed: %s", groupBy)
+		}
+	}
+	items, total, err := l.svcCtx.CRUD.List(l.ctx, ref, tenantID, 1, 5000, nil, "")
+	if err != nil {
+		return nil, err
+	}
+	resp := &types.AggregateResp{Total: total, GroupBy: groupBy, SumField: sumField}
+	if groupBy == "" {
+		if sumField != "" {
+			for _, it := range items {
+				resp.Sum += toFloat(it[sumField])
+			}
+		}
+		return resp, nil
+	}
+	buckets := map[string]*types.AggregateBucket{}
+	order := []string{}
+	for _, it := range items {
+		key := fmt.Sprint(it[groupBy])
+		if key == "" || key == "<nil>" {
+			key = "(空)"
+		}
+		b, ok := buckets[key]
+		if !ok {
+			b = &types.AggregateBucket{Key: key}
+			buckets[key] = b
+			order = append(order, key)
+		}
+		b.Count++
+		if sumField != "" {
+			b.Sum += toFloat(it[sumField])
+			resp.Sum += toFloat(it[sumField])
+		}
+	}
+	for _, k := range order {
+		resp.Buckets = append(resp.Buckets, *buckets[k])
+	}
+	return resp, nil
+}
+
+func toFloat(v any) float64 {
+	switch t := v.(type) {
+	case float64:
+		return t
+	case float32:
+		return float64(t)
+	case int:
+		return float64(t)
+	case int64:
+		return float64(t)
+	case string:
+		n, _ := strconv.ParseFloat(t, 64)
+		return n
+	default:
+		return 0
+	}
+}