init: 初始化 AssetX 项目仓库

包含 webapp（Next.js 用户端）、webapp-back（Go 后端）、
antdesign（管理后台）、landingpage（营销落地页）、
数据库 SQL 和配置文件。

webapp-back/admin/common.go

@@ -0,0 +1,131 @@
+package admin
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/gothinkster/golang-gin-realworld-example-app/common"
+	"github.com/gothinkster/golang-gin-realworld-example-app/middleware"
+	"github.com/gothinkster/golang-gin-realworld-example-app/models"
+)
+
+// PaginationParams holds parsed ProTable pagination query params
+type PaginationParams struct {
+	Current  int
+	PageSize int
+}
+
+// ParsePagination reads ?current=N&pageSize=M from the request
+func ParsePagination(c *gin.Context) PaginationParams {
+	current, _ := strconv.Atoi(c.DefaultQuery("current", "1"))
+	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "20"))
+	if current < 1 {
+		current = 1
+	}
+	if pageSize < 1 {
+		pageSize = 20
+	}
+	if pageSize > 100 {
+		pageSize = 100
+	}
+	return PaginationParams{Current: current, PageSize: pageSize}
+}
+
+// Offset returns the DB offset for GORM queries
+func (p PaginationParams) Offset() int {
+	return (p.Current - 1) * p.PageSize
+}
+
+// OK responds with {success: true, data: ...}
+func OK(c *gin.Context, data interface{}) {
+	c.JSON(http.StatusOK, gin.H{"success": true, "data": data})
+}
+
+// OKList responds with {success: true, data: [...], total: N} — used by ProTable
+func OKList(c *gin.Context, data interface{}, total int64) {
+	c.JSON(http.StatusOK, gin.H{"success": true, "data": data, "total": total})
+}
+
+// Fail responds with {success: false, message: ...}
+func Fail(c *gin.Context, status int, msg string) {
+	c.JSON(status, gin.H{"success": false, "message": msg})
+}
+
+// flexTimeLayouts is the set of time formats accepted from the frontend.
+var flexTimeLayouts = []string{
+	"2006-01-02T15:04:05",
+	"2006-01-02 15:04:05",
+	"2006-01-02T15:04",
+	"2006-01-02 15:04",
+	"2006-01-02",
+}
+
+// BindJSONFlexTime works like c.ShouldBindJSON but also accepts non-RFC3339
+// time strings such as "2026-02-28 00:00:00" that Ant Design's DatePicker sends.
+// It reads the raw body, converts any date-like strings to RFC3339, then unmarshals.
+func BindJSONFlexTime(c *gin.Context, obj interface{}) error {
+	body, err := io.ReadAll(c.Request.Body)
+	if err != nil {
+		return err
+	}
+
+	var raw map[string]json.RawMessage
+	if err := json.Unmarshal(body, &raw); err != nil {
+		return json.Unmarshal(body, obj) // fallback: let normal errors surface
+	}
+
+	for key, val := range raw {
+		var s string
+		if err := json.Unmarshal(val, &s); err != nil {
+			continue // not a string, skip
+		}
+		for _, layout := range flexTimeLayouts {
+			if t, err := time.Parse(layout, s); err == nil {
+				converted, _ := json.Marshal(t) // produces RFC3339
+				raw[key] = converted
+				break
+			}
+		}
+	}
+
+	fixed, err := json.Marshal(raw)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(fixed, obj)
+}
+
+// LogOp writes a record to operation_logs table
+func LogOp(c *gin.Context, opType, targetType, action string, targetID *uint, payload interface{}) {
+	db := common.GetDB()
+	user, _ := middleware.GetCurrentUser(c)
+
+	var userID *uint
+	if user != nil {
+		uid := uint(user.UserID)
+		userID = &uid
+	}
+
+	var changesStr string
+	if payload != nil {
+		b, _ := json.Marshal(payload)
+		changesStr = string(b)
+	}
+
+	db.Create(&models.OperationLog{
+		UserID:        userID,
+		OperationType: opType,
+		TargetType:    targetType,
+		Action:        action,
+		TargetID:      targetID,
+		Changes:       changesStr,
+		IPAddress:     c.ClientIP(),
+		UserAgent:     c.GetHeader("User-Agent"),
+		Status:        "success",
+		CreatedAt:     time.Now(),
+	})
+}