feat: page manipulation in projects

router/editor.go

@@ -0,0 +1,107 @@
+package router
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+
+	"forge.capytal.company/capytalcode/project-comicverse/service"
+	"forge.capytal.company/loreddev/x/smalltrip/exception"
+)
+
+func (router *router) pages(w http.ResponseWriter, r *http.Request) {
+	router.assert.NotNil(w)
+	router.assert.NotNil(r)
+
+	id := r.PathValue("ID")
+	if id == "" {
+		exception.
+			BadRequest(fmt.Errorf(`a valid path value of "ID" must be provided`)).
+			ServeHTTP(w, r)
+		return
+	}
+
+	switch getMethod(r) {
+	case http.MethodGet, http.MethodHead:
+		imgID := r.PathValue("PageID")
+		if imgID == "" {
+			exception.
+				BadRequest(fmt.Errorf(`a valid path value of "PageID" must be provided`)).
+				ServeHTTP(w, r)
+			return
+		}
+
+		router.getPage(w, r)
+
+	case http.MethodPost:
+		router.addPage(w, r)
+
+	default:
+		exception.
+			MethodNotAllowed([]string{
+				http.MethodGet,
+				http.MethodHead,
+				http.MethodPost,
+			}).
+			ServeHTTP(w, r)
+	}
+}
+
+func (router *router) addPage(w http.ResponseWriter, r *http.Request) {
+	router.assert.NotNil(w)
+	router.assert.NotNil(r)
+	router.assert.NotNil(router.service)
+
+	id := r.PathValue("ID")
+	router.assert.NotZero(id, "This method should be used after the path values are checked")
+
+	img, _, err := r.FormFile("image")
+	if err != nil {
+		// TODO: Handle if the file is bigger than allowed by ParseForm (10mb)
+		exception.InternalServerError(err).ServeHTTP(w, r)
+		return
+	}
+
+	err = router.service.AddPage(id, img)
+	if err != nil {
+		exception.InternalServerError(err).ServeHTTP(w, r)
+		return
+	}
+
+	http.Redirect(w, r, fmt.Sprintf("/projects/%s/", id), http.StatusSeeOther)
+}
+
+func (router *router) getPage(w http.ResponseWriter, r *http.Request) {
+	router.assert.NotNil(w)
+	router.assert.NotNil(r)
+	router.assert.NotNil(router.service)
+
+	id := r.PathValue("ID")
+	router.assert.NotZero(id, "This method should be used after the path values are checked")
+
+	imgID := r.PathValue("PageID")
+	router.assert.NotZero(imgID, "This method should be used after the path values are checked")
+
+	img, err := router.service.GetPage(id, imgID)
+	if errors.Is(err, service.ErrPageNotExists) {
+		exception.NotFound(exception.WithError(err)).ServeHTTP(w, r)
+		return
+	}
+	if err != nil {
+		exception.InternalServerError(err).ServeHTTP(w, r)
+		return
+	}
+
+	if i, ok := img.(io.WriterTo); ok {
+		_, err = i.WriteTo(w)
+	} else {
+		_, err = io.Copy(w, img)
+	}
+
+	if err != nil {
+		exception.InternalServerError(err).ServeHTTP(w, r)
+		return
+	}
+}
+

router/router.go

@@ -97,6 +97,8 @@ func (router *router) setup() http.Handler {
 
 	r.HandleFunc("/projects/{$}", router.projects)
 	r.HandleFunc("/projects/{ID}/", router.projects)
+	r.HandleFunc("/projects/{ID}/pages/{$}", router.pages)
+	r.HandleFunc("/projects/{ID}/pages/{PageID}", router.pages)
 
 	return r
 }