goext/ginext/routes.go

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package ginext
import (
"github.com/gin-gonic/gin"
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"gogs.mikescher.com/BlackForestBytes/goext/langext"
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"net/http"
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"path"
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"reflect"
"runtime"
"strings"
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)
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var anyMethods = []string{
http.MethodGet, http.MethodPost, http.MethodPut, http.MethodPatch,
http.MethodHead, http.MethodOptions, http.MethodDelete, http.MethodConnect,
http.MethodTrace,
}
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type GinRoutesWrapper struct {
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wrapper *GinWrapper
routes gin.IRouter
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absPath string
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defaultHandler []gin.HandlerFunc
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}
type GinRouteBuilder struct {
routes *GinRoutesWrapper
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method string
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relPath string
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absPath string
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handlers []gin.HandlerFunc
}
func (w *GinWrapper) Routes() *GinRoutesWrapper {
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return &GinRoutesWrapper{
wrapper: w,
routes: w.engine,
absPath: "",
defaultHandler: make([]gin.HandlerFunc, 0),
}
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}
func (w *GinRoutesWrapper) Group(relativePath string) *GinRoutesWrapper {
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return &GinRoutesWrapper{
wrapper: w.wrapper,
routes: w.routes.Group(relativePath),
defaultHandler: langext.ArrCopy(w.defaultHandler),
absPath: joinPaths(w.absPath, relativePath),
}
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}
func (w *GinRoutesWrapper) Use(middleware ...gin.HandlerFunc) *GinRoutesWrapper {
defHandler := langext.ArrCopy(w.defaultHandler)
defHandler = append(defHandler, middleware...)
return &GinRoutesWrapper{wrapper: w.wrapper, routes: w.routes, defaultHandler: defHandler, absPath: w.absPath}
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}
func (w *GinRoutesWrapper) WithJSONFilter(filter string) *GinRoutesWrapper {
return w.Use(func(g *gin.Context) { g.Set("goext.jsonfilter", filter) })
}
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func (w *GinRoutesWrapper) GET(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodGet, relativePath)
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}
func (w *GinRoutesWrapper) POST(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodPost, relativePath)
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}
func (w *GinRoutesWrapper) DELETE(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodDelete, relativePath)
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}
func (w *GinRoutesWrapper) PATCH(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodPatch, relativePath)
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}
func (w *GinRoutesWrapper) PUT(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodPut, relativePath)
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}
func (w *GinRoutesWrapper) OPTIONS(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodOptions, relativePath)
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}
func (w *GinRoutesWrapper) HEAD(relativePath string) *GinRouteBuilder {
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return w._route(http.MethodHead, relativePath)
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}
func (w *GinRoutesWrapper) COUNT(relativePath string) *GinRouteBuilder {
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return w._route("COUNT", relativePath)
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}
func (w *GinRoutesWrapper) Any(relativePath string) *GinRouteBuilder {
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return w._route("*", relativePath)
}
func (w *GinRoutesWrapper) _route(method string, relativePath string) *GinRouteBuilder {
return &GinRouteBuilder{
routes: w,
method: method,
relPath: relativePath,
absPath: joinPaths(w.absPath, relativePath),
handlers: langext.ArrCopy(w.defaultHandler),
}
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}
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func (w *GinRouteBuilder) Use(middleware ...gin.HandlerFunc) *GinRouteBuilder {
w.handlers = append(w.handlers, middleware...)
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return w
}
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func (w *GinRouteBuilder) WithJSONFilter(filter string) *GinRouteBuilder {
return w.Use(func(g *gin.Context) { g.Set("goext.jsonfilter", filter) })
}
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func (w *GinRouteBuilder) Handle(handler WHandlerFunc) {
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if w.routes.wrapper.bufferBody {
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arr := make([]gin.HandlerFunc, 0, len(w.handlers)+1)
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arr = append(arr, BodyBuffer)
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arr = append(arr, w.handlers...)
w.handlers = arr
}
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middlewareNames := langext.ArrMap(w.handlers, func(v gin.HandlerFunc) string { return nameOfFunction(v) })
handlerName := nameOfFunction(handler)
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w.handlers = append(w.handlers, Wrap(w.routes.wrapper, handler))
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methodName := w.method
if w.method == "*" {
methodName = "ANY"
for _, method := range anyMethods {
w.routes.routes.Handle(method, w.relPath, w.handlers...)
}
} else {
w.routes.routes.Handle(w.method, w.relPath, w.handlers...)
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}
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w.routes.wrapper.routeSpecs = append(w.routes.wrapper.routeSpecs, ginRouteSpec{
Method: methodName,
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URL: w.absPath,
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Middlewares: middlewareNames,
Handler: handlerName,
})
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}
func (w *GinWrapper) NoRoute(handler WHandlerFunc) {
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handlers := make([]gin.HandlerFunc, 0)
if w.bufferBody {
handlers = append(handlers, BodyBuffer)
}
middlewareNames := langext.ArrMap(handlers, func(v gin.HandlerFunc) string { return nameOfFunction(v) })
handlerName := nameOfFunction(handler)
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handlers = append(handlers, Wrap(w, handler))
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w.engine.NoRoute(handlers...)
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w.routeSpecs = append(w.routeSpecs, ginRouteSpec{
Method: "ANY",
URL: "[NO_ROUTE]",
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Middlewares: middlewareNames,
Handler: handlerName,
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})
}
func nameOfFunction(f any) string {
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fname := runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
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split := strings.Split(fname, "/")
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if len(split) == 0 {
return ""
}
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fname = split[len(split)-1]
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// https://stackoverflow.com/a/32925345/1761622
if strings.HasSuffix(fname, "-fm") {
fname = fname[:len(fname)-len("-fm")]
}
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return fname
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}
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// joinPaths is copied verbatim from gin@v1.9.1/gin.go
func joinPaths(absolutePath, relativePath string) string {
if relativePath == "" {
return absolutePath
}
finalPath := path.Join(absolutePath, relativePath)
if lastChar(relativePath) == '/' && lastChar(finalPath) != '/' {
return finalPath + "/"
}
return finalPath
}
func lastChar(str string) uint8 {
if str == "" {
panic("The length of the string can't be 0")
}
return str[len(str)-1]
}