feat(handlers): /api/healthz, posts, comments, authors, channels

handler.go

@@ -0,0 +1,158 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+)
+
+func writeJSON(w http.ResponseWriter, code int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	_ = json.NewEncoder(w).Encode(v)
+}
+
+func jsonError(w http.ResponseWriter, code int, msg string) {
+	writeJSON(w, code, map[string]string{"error": msg})
+}
+
+func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
+	count, errors := s.store.FlushStats()
+	mem := s.store.MemUsage()
+	writeJSON(w, 200, map[string]any{
+		"status":      "ok",
+		"flushes":     count,
+		"flush_errors": errors,
+		"mem":         mem,
+	})
+}
+
+func (s *Server) handleListPosts(w http.ResponseWriter, r *http.Request) {
+	channel := r.URL.Query().Get("channel")
+	posts := s.store.ListPosts(channel, 20)
+	if posts == nil {
+		posts = []*Post{}
+	}
+	writeJSON(w, 200, map[string]any{"posts": posts})
+}
+
+func (s *Server) handleGetPost(w http.ResponseWriter, r *http.Request) {
+	id := strings.TrimPrefix(r.URL.Path, "/api/posts/")
+	if id == "" || strings.Contains(id, "/") {
+		jsonError(w, 400, "bad id")
+		return
+	}
+	post, ok := s.store.GetPost(id)
+	if !ok {
+		jsonError(w, 404, "not found")
+		return
+	}
+	comments := s.store.ListComments(id)
+	if comments == nil {
+		comments = []*Comment{}
+	}
+	writeJSON(w, 200, PostWithComments{Post: *post, Comments: comments})
+}
+
+func (s *Server) handleCreatePost(w http.ResponseWriter, r *http.Request) {
+	author := r.Header.Get("X-Posts-Author")
+	if author == "" {
+		jsonError(w, 401, "X-Posts-Author required")
+		return
+	}
+	var req CreatePostRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonError(w, 400, "bad json")
+		return
+	}
+	m := &CreatePost{
+		AuthorID: author,
+		Title:    req.Title,
+		Body:     req.Body,
+		Channels: req.Channels,
+	}
+	if err := Submit(r.Context(), s.store, m); err != nil {
+		jsonError(w, 400, err.Error())
+		return
+	}
+	post, _ := s.store.GetPost(m.ResolvedPostID())
+	writeJSON(w, 201, post)
+}
+
+func (s *Server) handleCreateComment(w http.ResponseWriter, r *http.Request) {
+	author := r.Header.Get("X-Posts-Author")
+	if author == "" {
+		jsonError(w, 401, "X-Posts-Author required")
+		return
+	}
+	parts := strings.Split(strings.Trim(r.URL.Path, "/"), "/")
+	if len(parts) != 4 || parts[0] != "api" || parts[1] != "posts" || parts[3] != "comments" {
+		jsonError(w, 400, "bad path")
+		return
+	}
+	postID := parts[2]
+	var req CreateCommentRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonError(w, 400, "bad json")
+		return
+	}
+	m := &AddComment{
+		PostID:   postID,
+		ParentID: req.ParentID,
+		AuthorID: author,
+		Body:     req.Body,
+	}
+	if err := Submit(r.Context(), s.store, m); err != nil {
+		jsonError(w, 400, err.Error())
+		return
+	}
+	comments := s.store.ListComments(postID)
+	var created *Comment
+	for _, c := range comments {
+		if c.ID == m.ResolvedCommentID() {
+			created = c
+			break
+		}
+	}
+	writeJSON(w, 201, created)
+}
+
+
+func (s *Server) handleUpsertAuthor(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		ID          string `json:"id"`
+		Kind        string `json:"kind"`
+		DisplayName string `json:"display_name"`
+		AvatarURL   string `json:"avatar_url,omitempty"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonError(w, 400, "bad json")
+		return
+	}
+	m := &UpsertAuthor{ID: req.ID, AuthorKind: req.Kind, DisplayName: req.DisplayName, AvatarURL: req.AvatarURL}
+	if err := Submit(r.Context(), s.store, m); err != nil {
+		jsonError(w, 400, err.Error())
+		return
+	}
+	a, _ := s.store.GetAuthor(m.ID)
+	writeJSON(w, 200, a)
+}
+
+func (s *Server) handleUpsertChannel(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		Slug        string `json:"slug"`
+		Name        string `json:"name"`
+		Description string `json:"description,omitempty"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		jsonError(w, 400, "bad json")
+		return
+	}
+	m := &UpsertChannel{Slug: req.Slug, Name: req.Name, Description: req.Description}
+	if err := Submit(r.Context(), s.store, m); err != nil {
+		jsonError(w, 400, err.Error())
+		return
+	}
+	c, _ := s.store.GetChannel(m.Slug)
+	writeJSON(w, 200, c)
+}