feat: add chat for backend

internal/admin/admin.go

@@ -51,6 +51,11 @@ func (h *Handler) Routes(user, pass string) http.Handler {
 	r.Post("/users/coins", h.adjustCoins)
 	r.Post("/users/grant", h.grantToUser)
 	r.Post("/season/reset", h.resetSeason)
+	r.Get("/chat", h.chatAdmin)
+	r.Post("/chat/pack/add", h.chatPackAdd)
+	r.Post("/chat/pack/delete", h.chatPackDelete)
+	r.Post("/chat/message/add", h.chatMessageAdd)
+	r.Post("/chat/message/delete", h.chatMessageDelete)
 	return r
 }
 
@@ -438,6 +443,103 @@ func (h *Handler) grantToUser(w http.ResponseWriter, r *http.Request) {
 }
 
 // rows یک کوئری را به []map[string]any تبدیل می‌کند (برای رندرِ عمومیِ جدول‌ها).
+// --- مدیریتِ بسته‌های چت و پیام‌ها ---
+
+func (h *Handler) chatAdmin(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	packs := h.rows(ctx,
+		`SELECT id,title,kind,price_coins,vip,sort,enabled FROM chat_packs ORDER BY sort`,
+		"id", "title", "kind", "price_coins", "vip", "sort", "enabled")
+	// پیام‌های هر بسته را زیرِ همان بسته قرار می‌دهیم.
+	for _, p := range packs {
+		id, _ := p["id"].(string)
+		p["messages"] = h.messagesOf(ctx, id)
+	}
+	h.render(w, "chat.html", map[string]any{
+		"Nav":   "chat",
+		"Packs": packs,
+		"Saved": r.URL.Query().Get("saved") == "1",
+	})
+}
+
+func (h *Handler) messagesOf(ctx context.Context, packID string) []map[string]any {
+	rs, err := h.db.QueryContext(ctx,
+		`SELECT id,body,sort FROM chat_messages WHERE pack_id=? ORDER BY sort,id`, packID)
+	if err != nil {
+		return nil
+	}
+	defer rs.Close()
+	var out []map[string]any
+	for rs.Next() {
+		var id, sort int
+		var body string
+		if err := rs.Scan(&id, &body, &sort); err != nil {
+			return out
+		}
+		out = append(out, map[string]any{"id": id, "body": body, "sort": sort})
+	}
+	return out
+}
+
+func (h *Handler) chatPackAdd(w http.ResponseWriter, r *http.Request) {
+	_ = r.ParseForm()
+	id := r.FormValue("id")
+	if id == "" {
+		http.Error(w, "id required", http.StatusBadRequest)
+		return
+	}
+	num := func(k string) int { v, _ := strconv.Atoi(r.FormValue(k)); return v }
+	vip := 0
+	if r.FormValue("vip") == "on" {
+		vip = 1
+	}
+	kind := r.FormValue("kind")
+	if kind != "emoji" {
+		kind = "text"
+	}
+	_, err := h.db.ExecContext(r.Context(),
+		`INSERT OR REPLACE INTO chat_packs (id,title,kind,price_coins,vip,sort,enabled) VALUES (?,?,?,?,?,?,1)`,
+		id, r.FormValue("title"), kind, num("price_coins"), vip, num("sort"))
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, "/admin/chat?saved=1", http.StatusSeeOther)
+}
+
+func (h *Handler) chatPackDelete(w http.ResponseWriter, r *http.Request) {
+	_ = r.ParseForm()
+	id := r.FormValue("id")
+	_, _ = h.db.ExecContext(r.Context(), `DELETE FROM chat_messages WHERE pack_id=?`, id)
+	_, _ = h.db.ExecContext(r.Context(), `DELETE FROM chat_packs WHERE id=?`, id)
+	http.Redirect(w, r, "/admin/chat?saved=1", http.StatusSeeOther)
+}
+
+func (h *Handler) chatMessageAdd(w http.ResponseWriter, r *http.Request) {
+	_ = r.ParseForm()
+	pack := r.FormValue("pack_id")
+	body := r.FormValue("body")
+	if pack == "" || body == "" {
+		http.Redirect(w, r, "/admin/chat", http.StatusSeeOther)
+		return
+	}
+	sort, _ := strconv.Atoi(r.FormValue("sort"))
+	_, err := h.db.ExecContext(r.Context(),
+		`INSERT INTO chat_messages (pack_id,body,sort) VALUES (?,?,?)`, pack, body, sort)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, "/admin/chat?saved=1", http.StatusSeeOther)
+}
+
+func (h *Handler) chatMessageDelete(w http.ResponseWriter, r *http.Request) {
+	_ = r.ParseForm()
+	id, _ := strconv.Atoi(r.FormValue("id"))
+	_, _ = h.db.ExecContext(r.Context(), `DELETE FROM chat_messages WHERE id=?`, id)
+	http.Redirect(w, r, "/admin/chat?saved=1", http.StatusSeeOther)
+}
+
 func (h *Handler) rows(ctx context.Context, query string, cols ...string) []map[string]any {
 	rs, err := h.db.QueryContext(ctx, query)
 	if err != nil {