76 lines
2.6 KiB
Go
76 lines
2.6 KiB
Go
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package httpapi
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import (
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"net/http"
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"github.com/urpi/go-bananas/internal/domain"
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"github.com/urpi/go-bananas/internal/store"
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)
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// PreferenceHandlers serves the caller's own interface preferences.
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//
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// A preference belongs to the account rather than to a browser, so it is stored
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// against the identity subject and travels with the person to another device. It
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// is deliberately not part of the session token: the token is issued by the
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// identity provider and this service does not control its claims, so a choice made
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// here has to be read back from this API.
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type PreferenceHandlers struct {
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store *store.Store
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log Logger
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}
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// NewPreferenceHandlers builds the preference handler set.
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func NewPreferenceHandlers(st *store.Store, log Logger) *PreferenceHandlers {
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return &PreferenceHandlers{store: st, log: log}
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}
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// Get returns the caller's preferences, or the empty preference when they have
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// chosen nothing yet.
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func (h *PreferenceHandlers) Get(w http.ResponseWriter, r *http.Request) {
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identity := mustIdentity(r.Context())
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prefs, err := h.store.Preferences(r.Context(), identity.Subject)
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if err != nil {
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h.log.Error("read preferences", "subject", identity.Subject, "error", err)
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writeProblem(w, r, err)
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return
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}
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writeJSON(w, r, http.StatusOK, prefs)
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}
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// Update records the caller's preferences and echoes back what was stored, so the
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// client renders the server's decision rather than its own input.
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//
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// An empty selectedTheme clears the choice. Clearing through the same endpoint
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// rather than a second route keeps the write surface to one path, which matters
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// because this endpoint is the only thing that writes the row.
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func (h *PreferenceHandlers) Update(w http.ResponseWriter, r *http.Request) {
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identity := mustIdentity(r.Context())
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var request domain.UserPreferences
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if err := decodeJSON(r, &request); err != nil {
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writeProblem(w, r, err)
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return
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}
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stored, err := h.store.SetPreferences(r.Context(), identity.Subject, request)
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if err != nil {
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h.log.Warn("update preferences", "subject", identity.Subject, "error", err)
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writeProblem(w, r, err)
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return
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}
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writeJSON(w, r, http.StatusOK, stored)
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}
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// Reset forgets the caller's preferences and returns them to their defaults.
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func (h *PreferenceHandlers) Reset(w http.ResponseWriter, r *http.Request) {
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identity := mustIdentity(r.Context())
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if _, err := h.store.ClearPreferences(r.Context(), identity.Subject); err != nil {
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h.log.Error("clear preferences", "subject", identity.Subject, "error", err)
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writeProblem(w, r, err)
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return
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}
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writeJSON(w, r, http.StatusOK, domain.UserPreferences{})
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}
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