Add auth, rest api, svelte frontend, build structure

internal/api/rest.go

@@ -0,0 +1,131 @@
+package api
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"strconv"
+
+	"git.clustercockpit.org/moebiusband/go-http-skeleton/internal/repository"
+)
+
+type ErrorResponse struct {
+	// Statustext of Errorcode
+	Status string `json:"status"`
+	Error  string `json:"error"` // Error Message
+}
+
+func MountApiEndpoints(r *http.ServeMux) {
+	r.HandleFunc("POST /api/news/", createNewsItem)
+	r.HandleFunc("GET /api/news/", readNewsItems)
+	r.HandleFunc("GET /api/news/{id}", readNewsItem)
+	r.HandleFunc("PATCH /api/news/", updateNewsItem)
+	r.HandleFunc("DELETE /api/news/{id}", deleteNewsItem)
+}
+
+func handleError(err error, statusCode int, rw http.ResponseWriter) {
+	slog.Warn("rest error", "error", err)
+	rw.Header().Add("Content-Type", "application/json")
+	rw.WriteHeader(statusCode)
+	json.NewEncoder(rw).Encode(ErrorResponse{
+		Status: http.StatusText(statusCode),
+		Error:  err.Error(),
+	})
+}
+
+func decode(r io.Reader, val any) error {
+	dec := json.NewDecoder(r)
+	dec.DisallowUnknownFields()
+	return dec.Decode(val)
+}
+
+func createNewsItem(rw http.ResponseWriter, r *http.Request) {
+	req := repository.CreateNewsEntryParams{}
+	if err := decode(r.Body, &req); err != nil {
+		handleError(fmt.Errorf("parsing request body failed: %w", err), http.StatusBadRequest, rw)
+		return
+	}
+
+	repo := repository.GetRepository()
+	err := repo.CreateNewsEntry(r.Context(), req)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+}
+
+func readNewsItems(rw http.ResponseWriter, r *http.Request) {
+	repo := repository.GetRepository()
+	items, err := repo.ListNews(r.Context())
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+
+	slog.Debug("/api/news returned", "newscount", len(items))
+	rw.Header().Add("Content-Type", "application/json")
+	bw := bufio.NewWriter(rw)
+	defer bw.Flush()
+
+	if err := json.NewEncoder(bw).Encode(items); err != nil {
+		handleError(err, http.StatusInternalServerError, rw)
+		return
+	}
+}
+
+func readNewsItem(rw http.ResponseWriter, r *http.Request) {
+	repo := repository.GetRepository()
+	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+
+	item, err := repo.GetNewsEntry(r.Context(), id)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+
+	rw.Header().Add("Content-Type", "application/json")
+	bw := bufio.NewWriter(rw)
+	defer bw.Flush()
+
+	if err := json.NewEncoder(bw).Encode(item); err != nil {
+		handleError(err, http.StatusInternalServerError, rw)
+		return
+	}
+}
+
+func updateNewsItem(rw http.ResponseWriter, r *http.Request) {
+	req := repository.UpdateNewsEntryParams{}
+	if err := decode(r.Body, &req); err != nil {
+		handleError(fmt.Errorf("parsing request body failed: %w", err), http.StatusBadRequest, rw)
+		return
+	}
+
+	repo := repository.GetRepository()
+	err := repo.UpdateNewsEntry(r.Context(), req)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+}
+
+func deleteNewsItem(rw http.ResponseWriter, r *http.Request) {
+	repo := repository.GetRepository()
+	id, err := strconv.ParseInt(r.PathValue("id"), 10, 64)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+
+	err = repo.DeleteNewsEntry(r.Context(), id)
+	if err != nil {
+		handleError(err, http.StatusBadRequest, rw)
+		return
+	}
+}