Add /posts handler to api

1 files changed, 46 insertions, 0 deletions

diff --git a/srv/src/api/posts.go b/srv/src/api/posts.go
new file mode 100644
index 0000000..995f2fb
--- /dev/null
+++ b/srv/src/api/posts.go
@@ -0,0 +1,46 @@
+package api
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/api/apiutils"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
+)
+
+func (a *api) postHandler() http.Handler {
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html")
+
+		storedPost, err := a.params.PostStore.GetByID(id)
+
+		if errors.Is(err, post.ErrPostNotFound) {
+			http.Error(rw, "Post not found", 404)
+			return
+		} else if err != nil {
+			apiutils.InternalServerError(
+				rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
+			)
+			return
+		}
+
+		renderablePost, err := post.NewRenderablePost(a.params.PostStore, storedPost)
+		if err != nil {
+			apiutils.InternalServerError(
+				rw, r, fmt.Errorf("constructing renderable post with id %q: %w", id, err),
+			)
+			return
+		}
+
+		if err := a.params.PostHTTPRenderer.Render(rw, renderablePost); err != nil {
+			apiutils.InternalServerError(
+				rw, r, fmt.Errorf("rendering post with id %q: %w", id, err),
+			)
+			return
+		}
+	})
+}