86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
package http
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import (
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"encoding/json"
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"log/slog"
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"net/http"
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"github.com/emil28092005/SciMesh/users/internal/usecase"
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)
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// Handlers holds the use cases each endpoint drives.
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type Handlers struct {
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register *usecase.Register
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login *usecase.Login
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users usecase.UserRepository
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log *slog.Logger
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}
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// handleHealth is an unauthenticated liveness probe for the container and load
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// balancer.
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func (h *Handlers) handleHealth(w http.ResponseWriter, _ *http.Request) {
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writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
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}
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// handleRegister creates an account. It returns 201 with the public user view,
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// 409 if the email is taken, or 400 on a malformed body / weak password.
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func (h *Handlers) handleRegister(w http.ResponseWriter, r *http.Request) {
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var req registerRequest
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if !decodeJSON(w, r, &req) {
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return
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}
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u, err := h.register.Execute(r.Context(), req.Email, req.Password)
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if err != nil {
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writeError(w, r, h.log, err)
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return
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}
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writeJSON(w, http.StatusCreated, toUserResponse(u))
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}
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// handleLogin verifies credentials and returns a signed token plus the user.
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func (h *Handlers) handleLogin(w http.ResponseWriter, r *http.Request) {
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var req loginRequest
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if !decodeJSON(w, r, &req) {
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return
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}
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token, u, err := h.login.Execute(r.Context(), req.Email, req.Password)
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if err != nil {
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writeError(w, r, h.log, err)
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return
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}
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writeJSON(w, http.StatusOK, loginResponse{Token: token, User: toUserResponse(u)})
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}
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// handleMe returns the caller's own account, proving the token works end to end.
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// It reads the user id the JWT middleware stashed in the context.
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func (h *Handlers) handleMe(w http.ResponseWriter, r *http.Request) {
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id, ok := userIDFrom(r.Context())
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if !ok {
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unauthorized(w, r)
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return
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}
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u, err := h.users.GetByID(r.Context(), id)
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if err != nil {
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writeError(w, r, h.log, err)
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return
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}
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writeJSON(w, http.StatusOK, toUserResponse(u))
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}
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// decodeJSON reads a size-capped JSON body into dst, rejecting unknown fields.
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// It writes a 400 and returns false on any problem, so callers can `if
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// !decodeJSON(...) { return }`.
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func decodeJSON(w http.ResponseWriter, r *http.Request, dst any) bool {
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r.Body = http.MaxBytesReader(w, r.Body, maxJSONBody)
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dec := json.NewDecoder(r.Body)
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dec.DisallowUnknownFields()
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if err := dec.Decode(dst); err != nil {
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writeJSON(w, http.StatusBadRequest, errorResponse{
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Error: "invalid JSON body",
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RequestID: requestIDFrom(r.Context()),
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})
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return false
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}
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return true
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}
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