chore(tfstated): refactor backend code to a dedicated package

pkg/backend/post.go

@@ -0,0 +1,40 @@
+package backend
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+
+	"git.adyxax.org/adyxax/tfstated/pkg/database"
+	"git.adyxax.org/adyxax/tfstated/pkg/helpers"
+	"git.adyxax.org/adyxax/tfstated/pkg/model"
+)
+
+func handlePost(db *database.DB) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path == "/" {
+			helpers.ErrorResponse(w, http.StatusBadRequest,
+				fmt.Errorf("no state path provided, cannot POST /"),
+			)
+			return
+		}
+
+		id := r.URL.Query().Get("ID")
+
+		data, err := io.ReadAll(r.Body)
+		if err != nil || len(data) == 0 {
+			helpers.ErrorResponse(w, http.StatusBadRequest, err)
+			return
+		}
+		account := r.Context().Value(model.AccountContextKey{}).(*model.Account)
+		if idMismatch, err := db.SetState(r.URL.Path, account.Id, data, id); err != nil {
+			if idMismatch {
+				helpers.ErrorResponse(w, http.StatusConflict, err)
+			} else {
+				helpers.ErrorResponse(w, http.StatusInternalServerError, err)
+			}
+		} else {
+			w.WriteHeader(http.StatusOK)
+		}
+	})
+}