Refactor WeChat integration to support multiple mini programs, removing hardcoded WeChat credentials and updating user model and authentication flow accordingly.

internal/model/mini_program.go

@@ -0,0 +1,23 @@
+package model
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type MiniProgram struct {
+	ID        uint           `gorm:"primarykey" json:"id"`
+	CreatedAt time.Time      `json:"created_at"`
+	UpdatedAt time.Time      `json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
+
+	Name        string `gorm:"size:100;not null" json:"name"`
+	AppID       string `gorm:"size:100;uniqueIndex" json:"app_id"`
+	AppSecret   string `gorm:"size:200;not null" json:"-"`
+	Description string `gorm:"size:255" json:"description"`
+}
+
+func (MiniProgram) TableName() string {
+	return "mini_programs"
+}

internal/model/user.go

@@ -12,12 +12,14 @@ type User struct {
 	UpdatedAt time.Time      `json:"updated_at"`
 	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
 
-	OpenID    string `gorm:"uniqueIndex;size:100" json:"open_id"`
-	UnionID   string `gorm:"size:100" json:"union_id,omitempty"`
-	NickName  string `gorm:"size:100" json:"nickname"`
-	AvatarURL string `gorm:"size:500" json:"avatar_url"`
-	Gender    int    `gorm:"default:0" json:"gender"`
-	Phone     string `gorm:"size:20" json:"phone,omitempty"`
+	MiniProgramID uint        `gorm:"index:idx_mini_open,priority:1" json:"mini_program_id"`
+	MiniProgram   MiniProgram `gorm:"foreignKey:MiniProgramID" json:"mini_program,omitempty"`
+	OpenID        string      `gorm:"size:100;index:idx_mini_open,priority:2" json:"open_id"`
+	UnionID       string      `gorm:"size:100" json:"union_id,omitempty"`
+	NickName      string      `gorm:"size:100" json:"nickname"`
+	AvatarURL     string      `gorm:"size:500" json:"avatar_url"`
+	Gender        int         `gorm:"default:0" json:"gender"`
+	Phone         string      `gorm:"size:20" json:"phone,omitempty"`
 
 	SessionKey string `gorm:"size:100" json:"-"`
 }