Add annotated filter, support @Import, @Filter.

Signed-off-by: Colstuwjx <Colstuwjx@gmail.com>

controller.go

@@ -47,10 +47,37 @@ var (
 	GlobalControllerRouter = make(map[string][]ControllerComments)
 )
 
+// ControllerFilter store the filter for controller
+type ControllerFilter struct {
+	Pattern        string
+	Pos            int
+	Filter         FilterFunc
+	ReturnOnOutput bool
+	ResetParams    bool
+}
+
+// ControllerFilterComments store the comment for controller level filter
+type ControllerFilterComments struct {
+	Pattern        string
+	Pos            int
+	Filter         string // NOQA
+	ReturnOnOutput bool
+	ResetParams    bool
+}
+
+// ControllerImportComments store the import comment for controller needed
+type ControllerImportComments struct {
+	ImportPath  string
+	ImportAlias string
+}
+
 // ControllerComments store the comment for the controller method
 type ControllerComments struct {
 	Method           string
 	Router           string
+	Filters          []*ControllerFilter
+	ImportComments   []*ControllerImportComments
+	FilterComments   []*ControllerFilterComments
 	AllowHTTPMethods []string
 	Params           []map[string]string
 	MethodParams     []*param.MethodParam

parser.go

@@ -39,7 +39,7 @@ var globalRouterTemplate = `package routers
 
 import (
 	"github.com/astaxie/beego"
-	"github.com/astaxie/beego/context/param"
+	"github.com/astaxie/beego/context/param"{{.globalimport}}
 )
 
 func init() {
@@ -52,6 +52,22 @@ var (
 	commentFilename    string
 	pkgLastupdate      map[string]int64
 	genInfoList        map[string][]ControllerComments
+
+	routerHooks = map[string]int{
+		"beego.BeforeStatic": BeforeStatic,
+		"beego.BeforeRouter": BeforeRouter,
+		"beego.BeforeExec":   BeforeExec,
+		"beego.AfterExec":    AfterExec,
+		"beego.FinishRouter": FinishRouter,
+	}
+
+	routerHooksMapping = map[int]string{
+		BeforeStatic: "beego.BeforeStatic",
+		BeforeRouter: "beego.BeforeRouter",
+		BeforeExec:   "beego.BeforeExec",
+		AfterExec:    "beego.AfterExec",
+		FinishRouter: "beego.FinishRouter",
+	}
 )
 
 const commentPrefix = "commentsRouter_"
@@ -102,6 +118,20 @@ type parsedComment struct {
 	routerPath string
 	methods    []string
 	params     map[string]parsedParam
+	filters    []parsedFilter
+	imports    []parsedImport
+}
+
+type parsedImport struct {
+	importPath  string
+	importAlias string
+}
+
+type parsedFilter struct {
+	pattern string
+	pos     int
+	filter  string
+	params  []bool
 }
 
 type parsedParam struct {
@@ -126,6 +156,8 @@ func parserComments(f *ast.FuncDecl, controllerName, pkgpath string) error {
 				cc.Router = parsedComment.routerPath
 				cc.AllowHTTPMethods = parsedComment.methods
 				cc.MethodParams = buildMethodParams(f.Type.Params.List, parsedComment)
+				cc.FilterComments = buildFilters(parsedComment.filters)
+				cc.ImportComments = buildImports(parsedComment.imports)
 				genInfoList[key] = append(genInfoList[key], cc)
 			}
 		}
@@ -133,6 +165,48 @@ func parserComments(f *ast.FuncDecl, controllerName, pkgpath string) error {
 	return nil
 }
 
+func buildImports(pis []parsedImport) []*ControllerImportComments {
+	var importComments []*ControllerImportComments
+
+	for _, pi := range pis {
+		importComments = append(importComments, &ControllerImportComments{
+			ImportPath:  pi.importPath,
+			ImportAlias: pi.importAlias,
+		})
+	}
+
+	return importComments
+}
+
+func buildFilters(pfs []parsedFilter) []*ControllerFilterComments {
+	var filterComments []*ControllerFilterComments
+
+	for _, pf := range pfs {
+		var (
+			returnOnOutput bool
+			resetParams    bool
+		)
+
+		if len(pf.params) >= 1 {
+			returnOnOutput = pf.params[0]
+		}
+
+		if len(pf.params) >= 2 {
+			resetParams = pf.params[1]
+		}
+
+		filterComments = append(filterComments, &ControllerFilterComments{
+			Filter:         pf.filter,
+			Pattern:        pf.pattern,
+			Pos:            pf.pos,
+			ReturnOnOutput: returnOnOutput,
+			ResetParams:    resetParams,
+		})
+	}
+
+	return filterComments
+}
+
 func buildMethodParams(funcParams []*ast.Field, pc *parsedComment) []*param.MethodParam {
 	result := make([]*param.MethodParam, 0, len(funcParams))
 	for _, fparam := range funcParams {
@@ -181,6 +255,8 @@ var routeRegex = regexp.MustCompile(`@router\s+(\S+)(?:\s+\[(\S+)\])?`)
 func parseComment(lines []*ast.Comment) (pcs []*parsedComment, err error) {
 	pcs = []*parsedComment{}
 	params := map[string]parsedParam{}
+	filters := []parsedFilter{}
+	imports := []parsedImport{}
 
 	for _, c := range lines {
 		t := strings.TrimSpace(strings.TrimLeft(c.Text, "//"))
@@ -209,9 +285,69 @@ func parseComment(lines []*ast.Comment) (pcs []*parsedComment, err error) {
 		}
 	}
 
+	for _, c := range lines {
+		t := strings.TrimSpace(strings.TrimLeft(c.Text, "//"))
+		if strings.HasPrefix(t, "@Import") {
+			iv := getparams(strings.TrimSpace(strings.TrimLeft(t, "@Import")))
+			if len(iv) == 0 || len(iv) > 2 {
+				logs.Error("Invalid @Import format. Only accepts 1 or 2 parameters")
+				continue
+			}
+
+			p := parsedImport{}
+			p.importPath = iv[0]
+
+			if len(iv) == 2 {
+				p.importAlias = iv[1]
+			}
+
+			imports = append(imports, p)
+		}
+	}
+
+filterLoop:
+	for _, c := range lines {
+		t := strings.TrimSpace(strings.TrimLeft(c.Text, "//"))
+		if strings.HasPrefix(t, "@Filter") {
+			fv := getparams(strings.TrimSpace(strings.TrimLeft(t, "@Filter")))
+			if len(fv) < 3 {
+				logs.Error("Invalid @Filter format. Needs at least 3 parameters")
+				continue filterLoop
+			}
+
+			p := parsedFilter{}
+			p.pattern = fv[0]
+			posName := fv[1]
+			if pos, exists := routerHooks[posName]; exists {
+				p.pos = pos
+			} else {
+				logs.Error("Invalid @Filter pos: ", posName)
+				continue filterLoop
+			}
+
+			p.filter = fv[2]
+			fvParams := fv[3:]
+			for _, fvParam := range fvParams {
+				switch fvParam {
+				case "true":
+					p.params = append(p.params, true)
+				case "false":
+					p.params = append(p.params, false)
+				default:
+					logs.Error("Invalid @Filter param: ", fvParam)
+					continue filterLoop
+				}
+			}
+
+			filters = append(filters, p)
+		}
+	}
+
 	for _, c := range lines {
 		var pc = &parsedComment{}
 		pc.params = params
+		pc.filters = filters
+		pc.imports = imports
 
 		t := strings.TrimSpace(strings.TrimLeft(c.Text, "//"))
 		if strings.HasPrefix(t, "@router") {
@@ -277,6 +413,7 @@ func genRouterCode(pkgRealpath string) {
 	logs.Info("generate router from comments")
 	var (
 		globalinfo   string
+		globalimport string
 		sortKey      []string
 	)
 	for k := range genInfoList {
@@ -295,6 +432,7 @@ func genRouterCode(pkgRealpath string) {
 				}
 				allmethod = strings.TrimRight(allmethod, ",") + "}"
 			}
+
 			params := "nil"
 			if len(c.Params) > 0 {
 				params = "[]map[string]string{"
@@ -305,6 +443,7 @@ func genRouterCode(pkgRealpath string) {
 				}
 				params = strings.TrimRight(params, ",") + "}"
 			}
+
 			methodParams := "param.Make("
 			if len(c.MethodParams) > 0 {
 				lines := make([]string, 0, len(c.MethodParams))
@@ -316,6 +455,43 @@ func genRouterCode(pkgRealpath string) {
 					",\n			"
 			}
 			methodParams += ")"
+
+			imports := ""
+			if len(c.ImportComments) > 0 {
+				for _, i := range c.ImportComments {
+					if i.ImportAlias != "" {
+						imports += fmt.Sprintf(`
+	%s "%s"`, i.ImportAlias, i.ImportPath)
+					} else {
+						imports += fmt.Sprintf(`
+	"%s"`, i.ImportPath)
+					}
+				}
+			}
+
+			filters := ""
+			if len(c.FilterComments) > 0 {
+				for _, f := range c.FilterComments {
+					filters += fmt.Sprintf(`                &beego.ControllerFilter{
+                    Pattern: "%s",
+                    Pos: %s,
+                    Filter: %s,
+                    ReturnOnOutput: %v,
+                    ResetParams: %v,
+                },`, f.Pattern, routerHooksMapping[f.Pos], f.Filter, f.ReturnOnOutput, f.ResetParams)
+				}
+			}
+
+			if filters == "" {
+				filters = "nil"
+			} else {
+				filters = fmt.Sprintf(`[]*beego.ControllerFilter{
+%s
+            }`, filters)
+			}
+
+			globalimport = imports
+
 			globalinfo = globalinfo + `
     beego.GlobalControllerRouter["` + k + `"] = append(beego.GlobalControllerRouter["` + k + `"],
         beego.ControllerComments{
@@ -323,17 +499,22 @@ func genRouterCode(pkgRealpath string) {
             ` + "Router: `" + c.Router + "`" + `,
             AllowHTTPMethods: ` + allmethod + `,
             MethodParams: ` + methodParams + `,
+            Filters: ` + filters + `,
             Params: ` + params + `})
 `
 		}
 	}
+
 	if globalinfo != "" {
 		f, err := os.Create(filepath.Join(getRouterDir(pkgRealpath), commentFilename))
 		if err != nil {
 			panic(err)
 		}
 		defer f.Close()
-		f.WriteString(strings.Replace(globalRouterTemplate, "{{.globalinfo}}", globalinfo, -1))
+
+		content := strings.Replace(globalRouterTemplate, "{{.globalinfo}}", globalinfo, -1)
+		content = strings.Replace(content, "{{.globalimport}}", globalimport, -1)
+		f.WriteString(content)
 	}
 }
 

router.go

@@ -277,6 +277,10 @@ func (p *ControllerRegister) Include(cList ...ControllerInterface) {
 		key := t.PkgPath() + ":" + t.Name()
 		if comm, ok := GlobalControllerRouter[key]; ok {
 			for _, a := range comm {
+				for _, f := range a.Filters {
+					p.InsertFilter(f.Pattern, f.Pos, f.Filter, f.ReturnOnOutput, f.ResetParams)
+				}
+
 				p.addWithMethodParams(a.Router, c, a.MethodParams, strings.Join(a.AllowHTTPMethods, ",")+":"+a.Method)
 			}
 		}