refactor: 重构项目结构

- 将server端相关依赖单独防止在server中

interval/server/api/handler/doc.go

@@ -0,0 +1,2 @@
+// Package handler contains HTTP request handlers for the REST API.
+package handler

interval/server/api/handler/health.go

@@ -0,0 +1,10 @@
+package handler
+
+import "net/http"
+
+func Health(w http.ResponseWriter, _ *http.Request) {
+	w.WriteHeader(http.StatusOK)
+	if _, err := w.Write([]byte("OK")); err != nil {
+		http.Error(w, "failed to write response", http.StatusInternalServerError)
+	}
+}

interval/server/api/handler/push.go

@@ -0,0 +1,47 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"git.jinshen.cn/remilia/push-server/interval/server/api/dto"
+	"git.jinshen.cn/remilia/push-server/interval/server/model"
+	"git.jinshen.cn/remilia/push-server/interval/server/ws"
+	"github.com/go-chi/chi/v5"
+)
+
+func PushHandler(hub *ws.Hub) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		topicStr := chi.URLParam(r, "topic")
+		topic := model.Topic(topicStr)
+		if !topic.Valid() {
+			http.Error(w, "invalid topic", http.StatusBadRequest)
+			return
+		}
+
+		var req dto.PublishRequest
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			http.Error(w, "invalid request body", http.StatusBadRequest)
+			return
+		}
+		if req.Content == "" {
+			http.Error(w, "content cannot be empty", http.StatusBadRequest)
+			return
+		}
+
+		msg := model.Message{
+			Topic:     topic,
+			Content:   []byte(req.Content),
+			Timestamp: time.Now().Unix(),
+		}
+
+		if err := hub.BroadcastMessage(r.Context(), msg); err != nil {
+			http.Error(w, "request cancelled", http.StatusRequestTimeout)
+			return
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusAccepted)
+	}
+}