Jānis Kacēns
54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package handlers
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import (
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"html/template"
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"log/slog"
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"net/http"
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"path/filepath"
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"qbank/internal/auth"
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)
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var tmplFuncs = template.FuncMap{
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"inc": func(i int) int { return i + 1 },
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}
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// Renderer parses and executes HTML templates from a directory.
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type Renderer struct {
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dir string
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}
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func NewRenderer(dir string) *Renderer { return &Renderer{dir: dir} }
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// Render executes layout.html + <name>.html, passing data to the "layout" template.
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func (r *Renderer) Render(w http.ResponseWriter, status int, name string, data any) {
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t, err := template.New("").Funcs(tmplFuncs).ParseFiles(
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filepath.Join(r.dir, "layout.html"),
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filepath.Join(r.dir, name+".html"),
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)
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if err != nil {
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slog.Error("parse template", "name", name, "err", err)
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http.Error(w, "internal error", http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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w.WriteHeader(status)
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if err := t.ExecuteTemplate(w, "layout", data); err != nil {
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slog.Error("execute template", "name", name, "err", err)
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}
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}
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// HTTPError writes a plain-text HTTP error.
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func HTTPError(w http.ResponseWriter, status int) {
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http.Error(w, http.StatusText(status), status)
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}
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// BaseData builds the common template map (User, CSRFToken, Flash).
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func BaseData(a *auth.Manager, r *http.Request) map[string]any {
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return map[string]any{
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"User": auth.UserFromCtx(r.Context()),
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"CSRFToken": a.CSRFToken(r),
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"Flash": a.PopFlash(r),
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}
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}
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