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Copy pathnode.go
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executable file
·312 lines (242 loc) · 6.01 KB
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package query
import (
"context"
"fmt"
"path/filepath"
"strings"
"time"
"github.com/glennliao/apijson-go/config"
"github.com/glennliao/apijson-go/consts"
"github.com/glennliao/apijson-go/model"
"github.com/glennliao/apijson-go/util"
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/util/gconv"
"github.com/samber/lo"
)
const (
NodeTypeStruct = iota // 结构节点
NodeTypeQuery // 查询节点
NodeTypeRef // 引用节点
NodeTypeFunc // functions 节点
)
type nodeHandler interface {
parse()
fetch()
result()
nodeType() int
}
type Page struct {
Count int
Page int
}
type Node struct {
ctx context.Context
queryContext *Query
// 当前节点key Todos, 如果Todo[], 保存为Todo
Key string
// 当前节点path -> []/Todos
Path string
// 节点类型
Type int
// 字段映射
Column map[string]string
// 是否为列表节点
isList bool
page *Page // 分页参数
// 访问当前节点的角色
role string
// 节点的请求数据
req model.Map
simpleReqVal string // 非对象结构
// 节点数据执行器
executor QueryExecutor
startAt time.Time
endAt time.Time
// 执行完毕
finish bool
later bool // 后续执行
ret any
err error
children map[string]*Node
refKeyMap map[string]NodeRef // 关联字段
primaryTableKey string // 主查询表
total int64 // 数据总条数
needTotal bool
nodeHandler nodeHandler
executorConfig *config.ExecutorConfig
}
// NodeRef 节点依赖引用
type NodeRef struct {
column string
node *Node
}
/**
node 生命周期
new -> buildChild -> parse -> fetch -> result
*/
func newNode(query *Query, key string, path string, nodeReq any) *Node {
if query.PrintProcessLog {
g.Log().Debugf(query.ctx, "【node】(%s) <new> ", path)
}
node := &Node{
ctx: query.ctx,
queryContext: query,
Key: key,
Path: path,
startAt: time.Now(),
finish: false,
}
node.Key, node.isList = parseNodeKey(key, path)
// 节点类型判断
if util.IsFirstUp(node.Key) { // 大写开头, 为查询节点(对应数据库)
node.Type = NodeTypeQuery
} else if strings.HasSuffix(node.Key, consts.RefKeySuffix) {
node.Type = NodeTypeRef
} else if strings.HasSuffix(node.Key, consts.FunctionsKeySuffix) {
node.Type = NodeTypeFunc
} else {
node.Type = NodeTypeStruct // 结构节点下应该必须存在查询节点
if query.NoAccessVerify == false {
if lo.Contains(query.DbMeta.GetTableNameList(), node.Key) {
node.Type = NodeTypeQuery
}
}
}
switch node.Type {
case NodeTypeQuery:
node.nodeHandler = newQueryNode(node)
case NodeTypeRef:
node.nodeHandler = newRefNode(node)
case NodeTypeStruct:
node.nodeHandler = newStructNode(node)
case NodeTypeFunc:
node.nodeHandler = newFuncNode(node)
}
switch nodeReq.(type) {
case map[string]any:
node.req = nodeReq.(map[string]any)
case model.Map:
node.req = nodeReq.(model.Map)
default:
node.simpleReqVal = gconv.String(nodeReq)
}
node.Column = map[string]string{}
return node
}
func parseNodeKey(inK string, path string) (k string, isList bool) {
k = inK
if strings.HasSuffix(k, consts.ListKeySuffix) {
isList = true
k = k[0 : len(k)-len(consts.ListKeySuffix)]
} else {
if strings.HasSuffix(filepath.Dir(path), consts.ListKeySuffix) { // parent is []
isList = true
}
}
return
}
func (n *Node) buildChild() error {
if n.Type == NodeTypeQuery && !util.HasFirstUpKey(n.req) { // 查询节点嵌套查询节点, 目前不支持
return nil
}
// 最大深度检查
maxDeep := n.queryContext.queryConfig.MaxTreeDeep()
if len(strings.Split(n.Path, "/")) > maxDeep {
return consts.NewValidReqErr(fmt.Sprintf("deep(%s) > %d", n.Path, maxDeep))
}
children := make(map[string]*Node)
for key, v := range n.req {
if strings.HasPrefix(key, consts.RefKeySuffix) {
continue
}
if n.Type == NodeTypeQuery && !util.IsFirstUp(key) { // 查询节点嵌套查询节点, 目前不支持
continue
}
if n.isList {
if lo.Contains([]string{consts.Total, consts.Page}, key) {
continue
}
}
path := n.Path
if path != "" { // 根节点时不带/
path += "/"
}
node := newNode(n.queryContext, key, path+key, v)
if n.Type != NodeTypeQuery { // 非查询节点role主要的功能是传递角色(设置该节点下子节点的角色)
setNodeRole(node, "", n.role)
}
err := node.buildChild()
if err != nil {
return err
}
children[key] = node
}
if len(children) > 0 {
// 最大宽度检查, 为当前节点的子节点数
maxWidth := n.queryContext.queryConfig.MaxTreeWidth()
if len(children) > maxWidth {
path := n.Path
if path == "" {
path = "root"
}
return consts.NewValidReqErr(fmt.Sprintf("width(%s) > %d", path, maxWidth))
}
n.children = children
for _, node := range children {
n.queryContext.pathNodes[node.Path] = node
}
}
return nil
}
func (n *Node) parse() {
if n.queryContext.PrintProcessLog {
g.Log().Debugf(n.ctx, "【node】(%s) <parse> ", n.Path)
}
if n.isList {
page := &Page{}
if v, exists := n.req[consts.Page]; exists {
page.Page = gconv.Int(v)
}
if v, exists := n.req[consts.Count]; exists {
page.Count = gconv.Int(v)
}
if v, exists := n.req[consts.Query]; exists {
switch gconv.String(v) {
case "1", "2":
n.needTotal = true
}
}
n.page = page
}
n.nodeHandler.parse()
if n.queryContext.PrintProcessLog {
g.Log().Debugf(n.ctx, "【node】(%s) <parse-endAt> ", n.Path)
}
}
func (n *Node) fetch() {
defer func() {
n.finish = true
n.endAt = time.Now()
if n.queryContext.PrintProcessLog {
g.Log().Debugf(n.ctx, "【node】(%s) <fetch-endAt> ", n.Path)
}
}()
if n.queryContext.PrintProcessLog {
g.Log().Debugf(n.ctx, "【node】(%s) <fetch> hasFinish: 【%v】", n.Path, n.finish)
}
if n.finish {
g.Log().Error(n.ctx, "再次执行", n.Path)
return
}
if n.err != nil {
return
}
n.nodeHandler.fetch()
}
func (n *Node) Result() (any, error) {
if n.err != nil {
return nil, n.err
}
n.nodeHandler.result()
return n.ret, n.err
}