100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
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package mux
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import (
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"fmt"
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"net/http"
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"strings"
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)
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// Resource is a resourceful route provides a mapping between HTTP verbs and URLs and controller actions.
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// By convention, each action also maps to particular CRUD operations in a database.
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// A single entry in the routing file, such as
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// Index route
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//
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// GET /resource-name # index route
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//
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// GET /resource-name/new # create resource page
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//
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// POST /resource-name # create resource post
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//
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// GET /resource-name/:id # view resource
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//
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// GET /resource-name/:id/edit # edit resource
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//
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// PUT /resource-name/:id # update resource
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//
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// DELETE /resource-name/:id # delete resource
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type Resource struct {
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mux *http.ServeMux
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pattern string
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middlewares []func(http.Handler) http.Handler
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}
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func sufixIt(str, sufix string) string {
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var p strings.Builder
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p.WriteString(str)
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if !strings.HasSuffix(str, "/") {
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p.WriteString("/")
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}
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p.WriteString(sufix)
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return p.String()
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}
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// Index is GET /resource-name
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func (r *Resource) Index(h http.HandlerFunc) {
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r.handlerFunc(http.MethodGet, r.pattern, h)
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}
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// Create is GET /resource-name/new
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func (r *Resource) New(h http.HandlerFunc) {
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r.handlerFunc(http.MethodGet, sufixIt(r.pattern, "new"), h)
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}
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// Create is POST /resource-name
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func (r *Resource) Create(h http.HandlerFunc) {
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r.handlerFunc(http.MethodPost, r.pattern, h)
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}
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// Show is GET /resource-name/:id
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func (r *Resource) Show(h http.HandlerFunc) {
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r.handlerFunc(http.MethodGet, sufixIt(r.pattern, "{id}"), h)
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}
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// Update is PUT /resource-name/:id
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func (r *Resource) Update(h http.HandlerFunc) {
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r.handlerFunc(http.MethodPut, sufixIt(r.pattern, "{id}"), h)
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}
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// Update is PATCH /resource-name/:id
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func (r *Resource) PartialUpdate(h http.HandlerFunc) {
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r.handlerFunc(http.MethodPatch, sufixIt(r.pattern, "{id}"), h)
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}
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func (r *Resource) Destroy(h http.HandlerFunc) {
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r.handlerFunc(http.MethodDelete, sufixIt(r.pattern, "{id}"), h)
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}
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// HandleFunc registers the handler function for the given pattern.
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// If the given pattern conflicts, with one that is already registered, HandleFunc
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// panics.
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func (r *Resource) handlerFunc(method, pattern string, h http.HandlerFunc) {
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if r == nil {
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panic("serve: func handlerFunc() was called on nil")
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}
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if r.mux == nil {
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panic("serve: router mux is nil")
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}
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path := fmt.Sprintf("%s %s", method, pattern)
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r.mux.Handle(path, stack(r.middlewares, h))
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}
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// Use appends one or more middlewares onto the Router stack.
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func (r *Resource) Use(middlewares ...func(http.Handler) http.Handler) {
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if r == nil {
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panic("serve: func Use was called on nil")
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}
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r.middlewares = append(r.middlewares, middlewares...)
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}
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