add backend tpl

backend/providers/swagger/swagger.go

@@ -0,0 +1,83 @@
+package swagger
+
+import (
+	"fmt"
+	"strings"
+
+	"backend/providers/http"
+
+	"git.ipao.vip/rogeecn/atom/container"
+	"git.ipao.vip/rogeecn/atom/utils/opt"
+	jsonpatch "github.com/evanphx/json-patch"
+	"github.com/gofiber/fiber/v2"
+	fiberSwagger "github.com/swaggo/fiber-swagger"
+	"github.com/swaggo/swag"
+)
+
+type Swagger struct {
+	config *Config
+	http   http.Service
+}
+
+const infoTpl = `{"schemes": "__ marshal .Schemes __",
+"swagger": "2.0",
+"info": {
+	"description": "{{escape .Description}}",
+	"title": "{{.Title}}",
+	"contact": {},
+	"version": "{{.Version}}"
+},
+"host": "{{.Host}}",
+"basePath": "{{.BasePath}}"}`
+
+func (swagger *Swagger) Load(spec string) error {
+	original := []byte(spec)
+	target := []byte(infoTpl)
+	patch, err := jsonpatch.MergeMergePatches(original, target)
+	if err != nil {
+		return err
+	}
+
+	merged, err := jsonpatch.MergePatch(original, patch)
+	if err != nil {
+		return err
+	}
+
+	spec = strings.NewReplacer(`"__`, "{{", `__"`, "}}").Replace(string(merged))
+
+	swaggerInfo := &swag.Spec{
+		Version:          swagger.config.Version,
+		Host:             swagger.config.Host,
+		BasePath:         swagger.config.BasePath,
+		Schemes:          []string{},
+		Title:            swagger.config.Title,
+		Description:      swagger.config.Description,
+		InfoInstanceName: "swagger",
+		SwaggerTemplate:  spec,
+		LeftDelim:        "{{",
+		RightDelim:       "}}",
+	}
+	swag.Register(swaggerInfo.InstanceName(), swaggerInfo)
+	engine := swagger.http.GetEngine().(*fiber.App)
+
+	engine.Get(fmt.Sprintf("/%s/*", swagger.config.BaseRoute), fiberSwagger.WrapHandler)
+	return nil
+}
+
+func Provide(opts ...opt.Option) error {
+	o := opt.New(opts...)
+	var config Config
+	if err := o.UnmarshalConfig(&config); err != nil {
+		return err
+	}
+
+	return container.Container.Provide(func(http http.Service) *Swagger {
+		if config.BaseRoute == "" {
+			config.BaseRoute = "swagger"
+		}
+		return &Swagger{
+			config: &config,
+			http:   http,
+		}
+	}, o.DiOptions()...)
+}