162 lines
3.4 KiB
Go
162 lines
3.4 KiB
Go
package api
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import (
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"context"
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"encoding/json"
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"net/http"
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"strconv"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/render"
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"github.com/google/uuid"
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"time"
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)
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func MessageCtx(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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var message *Message
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var err error
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if messageID := chi.URLParam(r, "messageID"); messageID != "" {
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message, err = dbGetMessage(messageID)
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} else {
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render.Render(w, r, ErrNotFound)
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return
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}
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if err != nil {
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render.Render(w, r, ErrNotFound)
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return
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}
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ctx := context.WithValue(r.Context(), messageKey{}, message)
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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}
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func GetMessage(w http.ResponseWriter, r *http.Request) {
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message, ok := r.Context().Value(messageKey{}).(*Message)
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if !ok || message == nil {
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render.Render(w, r, ErrNotFound)
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return
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}
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if err := render.Render(w, r, NewMessageResponse(message)); err != nil {
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render.Render(w, r, ErrRender(err))
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return
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}
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}
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func DeleteMessage(w http.ResponseWriter, r *http.Request) {
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message, ok := r.Context().Value(messageKey{}).(*Message)
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if !ok || message == nil {
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render.Render(w, r, ErrNotFound)
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return
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}
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dbDeleteMessage(message.ID)
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if err := render.Render(w, r, NewMessageResponse(message)); err != nil {
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render.Render(w, r, ErrRender(err))
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return
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}
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}
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func ListMessages(w http.ResponseWriter, r *http.Request) {
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dbMessages, err := dbGetAllMessages()
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if err != nil {
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render.Render(w, r, ErrRender(err))
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return
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}
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if err := render.RenderList(w, r, NewMessageListResponse(dbMessages)); err != nil {
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render.Render(w, r, ErrRender(err))
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return
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}
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}
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func newMessageID() string {
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return "msg_" + uuid.New().String()
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}
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func NewMessage(w http.ResponseWriter, r *http.Request) {
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err := r.ParseMultipartForm(32 << 20)
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if err != nil {
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http.Error(w, "Unable to parse form", http.StatusBadRequest)
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return
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}
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userIDStr := r.FormValue("user_id")
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userID, err := strconv.ParseInt(userIDStr, 10, 64)
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if err != nil {
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http.Error(w, "Invalid user ID", http.StatusBadRequest)
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return
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}
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body := r.FormValue("body")
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if body == "" {
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http.Error(w, "Invalid body", http.StatusBadRequest)
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return
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}
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msg := Message{
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ID: newMessageID(),
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UserID: userID,
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Body: body,
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Timestamp: time.Now(),
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}
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err = dbAddMessage(&msg)
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if err != nil {
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render.Render(w, r, ErrRender(err))
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return
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}
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render.Render(w, r, NewMessageResponse(&msg))
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}
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type messageKey struct{}
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type Message struct {
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ID string `json:"id"`
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UserID int64 `json:"user_id"`
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Body string `json:"body"`
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Timestamp time.Time `json:"timestamp"`
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}
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type MessageRequest struct {
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*Message
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User *UserPayload `json:"user"`
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ProtectedID string `json:"id"`
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}
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type MessageResponse struct {
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*Message
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User *UserPayload `json:"user,omitempty"`
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Elapsed int64 `json:"elapsed"`
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}
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func (m MessageResponse) MarshalJSON() ([]byte, error) {
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type OrderedMessageResponse struct {
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ID string `json:"id"`
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UserID int64 `json:"user_id"`
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Body string `json:"body"`
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Timestamp string `json:"timestamp"`
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User *UserPayload `json:"user,omitempty"`
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Elapsed int64 `json:"elapsed"`
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}
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ordered := OrderedMessageResponse{
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ID: m.Message.ID,
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UserID: m.Message.UserID,
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Body: m.Message.Body,
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Timestamp: m.Message.Timestamp.Format(time.RFC3339),
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User: m.User,
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Elapsed: m.Elapsed,
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}
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return json.Marshal(ordered)
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}
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