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@@ -0,0 +1,378 @@
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package logic
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// ============================================================================
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// logic 共享能力层:跨模块复用的运行时横切能力(组合式,非继承)
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//
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// 【架构约定 · 企业级纪律】
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// 1. 本文件按能力分区:文件字段 / 富文本 / 枚举文本 / 唯一校验 / 事务 / 分块查询 / 树
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// 2. 依赖方向单向:base 只允许依赖 dao / utility / 内部 consts,禁止引用任何模块文件
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// 3. 导出函数上限 15 个:超出即按能力拆为 internal/logic/base/ 子包(防"万能工具箱"腐化)
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// 4. CheckUnique 仅为 UX 快速报错(先查后插存在 TOCTOU 竞态),并发唯一性以数据库
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// 唯一索引(uk_*)为准,调用点必须保证对应 uk 索引存在,冲突时以错误1062翻译提示
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// 5. 富文本占位符 [IMG_URL] 是持久化契约(见 architecture.md),还原只能走 ExpandContentFields
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// ============================================================================
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"reflect"
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"regexp"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/gogf/gf/v2/database/gdb"
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"github.com/gogf/gf/v2/errors/gerror"
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"github.com/gogf/gf/v2/frame/g"
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"easygoadmin/internal/consts"
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"easygoadmin/internal/dao"
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"easygoadmin/utility/upload"
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)
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// ===========================================================================
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// 一、文件字段(保存前:临时文件转正式目录)
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// 声明式用法(ModuleSpec 逃生舱手写 Add/Update 内联场景):
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// FileFields: []string{"avatar"}, FileSaveDir: "user" // 字段名单 + 模块统一目录
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// SaveFileFields(ctx, data, spec.FileFields, spec.FileSaveDir) // 临时 → 正式,原地更新
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// ===========================================================================
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// SaveFileFields 单文件字段批量处理
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// 值为临时文件URL时移动到正式目录,其余原样保留
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func SaveFileFields(ctx context.Context, data map[string]any, fields []string, saveDir string) {
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for _, field := range fields {
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if v, ok := data[field]; ok {
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if s, ok2 := v.(string); ok2 && s != "" {
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data[field] = upload.SaveFromTemp(ctx, s, saveDir)
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}
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}
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}
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}
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// SaveMultiFileFields 多文件字段(逗号分隔)批量处理
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// 各文件为临时文件URL时移动到正式目录,其余原样保留
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func SaveMultiFileFields(ctx context.Context, data map[string]any, fields []string, saveDir string) {
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for _, field := range fields {
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if v, ok := data[field]; ok {
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if s, ok2 := v.(string); ok2 && s != "" {
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data[field] = upload.SaveFromTempMulti(ctx, s, saveDir)
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}
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}
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}
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}
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// SaveFileField 单值便捷版
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// 供模块内联场景使用,临时文件URL转正式目录
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func SaveFileField(ctx context.Context, fileUrl, saveDir string) string {
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return upload.SaveFromTemp(ctx, fileUrl, saveDir)
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}
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// SaveMultiFileField 逗号分隔多文件串便捷版
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// 供模块内联场景使用,临时文件URL批量转正式目录
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func SaveMultiFileField(ctx context.Context, fileUrls, saveDir string) string {
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return upload.SaveFromTempMulti(ctx, fileUrls, saveDir)
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}
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// ===========================================================================
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// 二、富文本(存库占位符化 / 读取还原)
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// 存库契约:正文内本站文件引用统一写为 [IMG_URL]/{相对uploadDir路径} 占位符
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// - temp 文件URL → 移动转正后写占位符
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// - 本站正式文件 → 剥离域名/静态前缀写占位符
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// - 外站 URL → 不处理(规避 SSRF)
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// 读取契约:ExpandContentFields 是唯一还原出口(占位符 → 静态访问基址拼接)
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// ===========================================================================
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var (
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contentSrcRe = regexp.MustCompile(`(?i)<(?:img|video|source|embed)[^>]+src=["']?([^"'>\s]+)`)
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contentHrefRe = regexp.MustCompile(`(?i)<a[^>]+href=["']?([^"'>\s]+\.\w{2,5})["']?`)
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)
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// LocalizeContentFields 富文本存库前本地化
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// 临时文件转正,并将本站URL统一写为 [IMG_URL] 占位符
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func LocalizeContentFields(ctx context.Context, content, saveDir string) string {
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if content == "" {
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return content
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}
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urlMap := map[string]string{}
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collect := func(re *regexp.Regexp) {
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for _, m := range re.FindAllStringSubmatch(content, -1) {
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if len(m) < 2 {
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continue
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}
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url := m[1]
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if _, seen := urlMap[url]; seen {
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continue
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}
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if newURL := localizeOne(ctx, url, saveDir); newURL != "" {
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urlMap[url] = newURL
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}
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}
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}
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collect(contentSrcRe)
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collect(contentHrefRe)
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for old, newV := range urlMap {
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content = strings.ReplaceAll(content, old, newV)
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}
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return content
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}
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// localizeOne 单个URL本地化处理
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// 临时文件转正为相对路径写占位符;本站正式文件剥离访问基址写占位符;其他返回空表示跳过
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func localizeOne(ctx context.Context, url, saveDir string) string {
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if strings.Contains(url, "/temp/") {
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newURL := upload.SaveFromTemp(ctx, url, saveDir)
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if newURL == "" || strings.HasPrefix(newURL, "http://") || strings.HasPrefix(newURL, "https://") {
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return ""
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}
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return "[IMG_URL]/" + strings.TrimLeft(newURL, "/")
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}
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// 本站正式文件:剥离访问基址(domainUrl)后剩余的 "/" 开头路径即相对路径;
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// 未剥离成功的(仍含协议头或未匹配基址)视为外站URL,跳过
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rest := strings.TrimPrefix(url, upload.GetAccessBase(ctx))
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if strings.HasPrefix(rest, "/") && !strings.Contains(rest, "://") {
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return "[IMG_URL]" + rest
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}
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return ""
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}
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// ExpandContentFields 富文本读取侧还原
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// 将 [IMG_URL]/{相对路径} 拼接访问基址,是唯一的还原出口
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func ExpandContentFields(ctx context.Context, content string) string {
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if content == "" {
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return content
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}
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return strings.ReplaceAll(content, "[IMG_URL]", upload.GetAccessBase(ctx))
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}
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// ===========================================================================
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// 三、枚举文本(字典值 → 显示名,详情/列表补 {field}Text)
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// ===========================================================================
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// dictTextCache 进程内字典文本缓存
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// 读多写少,TTL 300 秒,修改字典后最迟 5 分钟生效
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var dictTextCache sync.Map // key: {code}:{value} → dictTextEntry
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// dictTextEntry 字典文本缓存条目
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type dictTextEntry struct {
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text string // 显示名
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expires time.Time // 过期时间
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}
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// DictGetText 按字典编码与值获取显示名
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// dict_item 查询为唯一真相,未命中时返回原值文本
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func DictGetText(ctx context.Context, dictCode string, value any) string {
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val := strings.TrimSpace(fmt.Sprintf("%v", value))
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if dictCode == "" || val == "" {
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return val
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}
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key := dictCode + ":" + val
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if e, ok := dictTextCache.Load(key); ok {
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ent := e.(dictTextEntry)
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if time.Now().Before(ent.expires) {
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return ent.text
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}
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}
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dict, err := dao.Dict.Ctx(ctx).Where("code", dictCode).One()
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if err != nil || len(dict) == 0 {
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return val
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}
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item, err := dao.DictItem.Ctx(ctx).Where("dict_id", dict["id"].Int64()).Where("value", val).One()
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if err != nil || len(item) == 0 {
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return val
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}
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text := item["name"].String()
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dictTextCache.Store(key, dictTextEntry{text: text, expires: time.Now().Add(300 * time.Second)})
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return text
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}
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// SerializeMapOnRead 详情/列表读取后补 {field}Text 显示名
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// 直接在传入的 map 上原地更新
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func SerializeMapOnRead(ctx context.Context, data map[string]any, fieldDict map[string]string) {
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for field, dictCode := range fieldDict {
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if v, ok := data[field]; ok {
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data[field+"Text"] = DictGetText(ctx, dictCode, v)
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}
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}
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}
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// LogTypeText 操作日志类型转中文名
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//
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// 该字段存储的是注解常量值(1=新增…40=解绑),与字典编码体系不一致,
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// 故使用静态映射表而非字典;未知值回退原数字。
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func LogTypeText(v int) string {
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if n, ok := consts.LogTypeNames[v]; ok {
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return n
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}
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return fmt.Sprintf("%d", v)
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}
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// ===========================================================================
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// 四、唯一校验(TOCTOU 说明见文件头纪律4)
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// m 传入 dao.X.Ctx(ctx)(自带 del_flag/租户过滤)
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// ===========================================================================
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// CheckUnique 唯一性快速校验
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// label 为字段中文名,例如"角色编码"
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func CheckUnique(ctx context.Context, m *gdb.Model, column string, value any, excludeId int64, label string) error {
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mm := m.Where(column, value)
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if excludeId > 0 {
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mm = mm.WhereNot("id", excludeId)
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}
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n, err := mm.Count()
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if err != nil {
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return err
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}
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if n > 0 {
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return gerror.NewCodef(consts.CodeRecordExists, "%s已存在", label)
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}
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return nil
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}
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// ===========================================================================
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// 五、事务(gdb.WithTX 注入上下文,dao.Ctx(ctx) 自动走事务连接)
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// 纪律:事务内不做 HTTP/文件IO(保持短事务)
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// ===========================================================================
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// WithTrans 事务包裹
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// fn 返回错误时自动回滚
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func WithTrans(ctx context.Context, fn func(ctx context.Context) error) error {
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tx, err := g.DB().Begin(ctx)
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if err != nil {
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return err
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}
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if err = fn(gdb.WithTX(ctx, tx)); err != nil {
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_ = tx.Rollback()
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return err
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}
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return tx.Commit()
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}
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// ===========================================================================
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// 六、分块查询(导出防OOM)
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// build 每页重建查询(gdb Model 不可复用执行),快照语义:并发写入可能翻页漂移
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// ===========================================================================
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// ChunkQuery 分块遍历
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// build(page, size) 返回当页模型,fn 处理每页结果
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func ChunkQuery(ctx context.Context, build func(page, size int) *gdb.Model, size int, fn func(gdb.Result) error) error {
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if size <= 0 {
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size = 500
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}
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for page := 1; ; page++ {
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rows, err := build(page, size).All()
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if err != nil {
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return err
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}
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if len(rows) == 0 {
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return nil
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}
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if err = fn(rows); err != nil {
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return err
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}
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if len(rows) < size {
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return nil
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}
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}
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}
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// fillUserCount 按 user 表外键列统计引用数
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// 批量填充 DTO 的 UserCount 字段,供 level、position 等带 userCount 展示的模块复用;
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// list 元素需包含 Id 与 UserCount 字段
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func fillUserCount(ctx context.Context, column string, list any) {
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rv := reflect.ValueOf(list)
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if rv.Kind() != reflect.Ptr || rv.Elem().Kind() != reflect.Slice {
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return
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}
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slice := rv.Elem()
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counts := make(map[int64]int)
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rows, err := dao.User.Ctx(ctx).Fields("id, " + column).All()
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if err == nil {
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for _, r := range rows {
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if v := r[column].Int64(); v > 0 {
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counts[v]++
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}
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}
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}
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for i := 0; i < slice.Len(); i++ {
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item := slice.Index(i)
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for item.Kind() == reflect.Ptr {
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item = item.Elem()
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}
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if item.Kind() != reflect.Struct {
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continue
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}
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idField := item.FieldByName("Id")
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cntField := item.FieldByName("UserCount")
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if idField.IsValid() && cntField.IsValid() && cntField.CanSet() && cntField.Kind() == reflect.Int {
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cntField.SetInt(int64(counts[idField.Int()]))
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}
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}
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}
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// ===========================================================================
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// 七、树构建(泛型,供 menu/dept/category 等复用)
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// ===========================================================================
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// BuildTree 平铺列表转树
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// 父节点不在集合内则挂根;childrenOf 返回子级切片指针;less 排序,为 nil 时保持原序
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func BuildTree[T any](rows []T, idOf func(T) int64, pidOf func(T) int,
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childrenOf func(*T) *[]*T, less func(a, b T) bool) []*T {
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nodes := make(map[int64]*T, len(rows))
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ids := make([]int64, 0, len(rows))
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for _, r := range rows {
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item := r
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nodes[idOf(item)] = &item
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ids = append(ids, idOf(item))
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}
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roots := make([]*T, 0, len(ids))
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for _, idv := range ids {
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node := nodes[idv]
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if pid := pidOf(*node); pid != 0 {
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if parent, ok := nodes[int64(pid)]; ok {
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pc := childrenOf(parent)
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*pc = append(*pc, node)
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continue
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}
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}
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roots = append(roots, node)
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}
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if less != nil {
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sort.SliceStable(roots, func(i, j int) bool { return less(*roots[i], *roots[j]) })
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}
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return roots
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}
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// ===========================================================================
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// 临时目录清理(企业级运营闭环:避免 temp 孤儿文件堆积)
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// ===========================================================================
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// CleanTemp 清理上传临时目录
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// 删除 upload/temp 下超过 expireDays 天的日期子目录或散文件,返回删除数量
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func CleanTemp(ctx context.Context, expireDays int) int {
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if expireDays <= 0 {
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expireDays = 7
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}
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base := upload.TempBaseDir(ctx)
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entries, err := os.ReadDir(base)
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if err != nil {
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return 0
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}
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deadline := time.Now().AddDate(0, 0, -expireDays)
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removed := 0
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for _, e := range entries {
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if !e.IsDir() {
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continue
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}
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// 目录名即日期(Yyyymmdd)
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if day, e2 := time.Parse("20060102", e.Name()); e2 == nil && day.Before(deadline) {
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if os.RemoveAll(filepath.Join(base, e.Name())) == nil {
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removed++
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}
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}
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}
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return removed
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}
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