Initial implementation of admin assets page

srv/src/api/api.go

@@ -200,6 +200,8 @@ func (a *api) handler() http.Handler {
 
 	mux.Handle("/v2/assets/", a.servePostAssetHandler())
 
+	mux.Handle("/v2/admin/assets.html", a.renderAdminAssets())
+
 	var globalHandler http.Handler = mux
 	globalHandler = setLoggerMiddleware(a.params.Logger, globalHandler)
 

srv/src/api/render.go

@@ -39,6 +39,10 @@ func (a *api) mustParseTpl(name string) *template.Template {
 
 	tpl := template.New("").Funcs(template.FuncMap{
 		"BlogURL": blogURL,
+		"AssetURL": func(path string) string {
+			path = filepath.Join("assets", path)
+			return blogURL(path)
+		},
 	})
 
 	tpl = template.Must(tpl.Parse(mustRead(name)))
@@ -192,3 +196,33 @@ func (a *api) renderDumbHandler(tplName string) http.Handler {
 		}
 	})
 }
+
+func (a *api) renderAdminAssets() http.Handler {
+
+	tpl := a.mustParseTpl("admin/assets.html")
+
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		ids, err := a.params.PostAssetStore.List()
+
+		if err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf("getting list of asset ids: %w", err),
+			)
+			return
+		}
+
+		tplData := struct {
+			IDs []string
+		}{
+			IDs: ids,
+		}
+
+		if err := tpl.Execute(rw, tplData); err != nil {
+			apiutil.InternalServerError(
+				rw, r, fmt.Errorf("rendering: %w", err),
+			)
+			return
+		}
+	})
+}

srv/src/api/tpl/admin/assets.html

@@ -0,0 +1,18 @@
+{{ define "body" }}
+
+<table>
+
+  {{ range .IDs }}
+    <tr>
+      <td><a href="{{ AssetURL . }}" target="_blank">{{ . }}</a></td>
+      <td>
+        Delete (TODO)
+      </td>
+    </tr>
+  {{ end }}
+
+</table>
+
+{{ end }}
+
+{{ template "base.html" . }}

srv/src/post/asset.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"sync"
 )
 
 var (
@@ -28,6 +27,9 @@ type AssetStore interface {
 
 	// Delete's the body stored for the id, if any.
 	Delete(id string) error
+
+	// List returns all ids which are currently stored.
+	List() ([]string, error)
 }
 
 type assetStore struct {
@@ -86,68 +88,27 @@ func (s *assetStore) Delete(id string) error {
 	return err
 }
 
-////////////////////////////////////////////////////////////////////////////////
-
-type cachedAssetStore struct {
-	inner AssetStore
-	m     sync.Map
-}
-
-// NewCachedAssetStore wraps an AssetStore in an in-memory cache.
-func NewCachedAssetStore(assetStore AssetStore) AssetStore {
-	return &cachedAssetStore{
-		inner: assetStore,
-	}
-}
-
-func (s *cachedAssetStore) Set(id string, from io.Reader) error {
+func (s *assetStore) List() ([]string, error) {
 
-	buf := new(bytes.Buffer)
-	from = io.TeeReader(from, buf)
+	rows, err := s.db.Query(`SELECT id FROM assets ORDER BY id ASC`)
 
-	if err := s.inner.Set(id, from); err != nil {
-		return err
+	if err != nil {
+		return nil, fmt.Errorf("querying: %w", err)
 	}
 
-	s.m.Store(id, buf.Bytes())
-	return nil
-}
-
-func (s *cachedAssetStore) Get(id string, into io.Writer) error {
+	defer rows.Close()
 
-	if bodyI, ok := s.m.Load(id); ok {
+	var ids []string
 
-		if err, ok := bodyI.(error); ok {
-			return err
-		}
+	for rows.Next() {
 
-		if _, err := io.Copy(into, bytes.NewReader(bodyI.([]byte))); err != nil {
-			return fmt.Errorf("writing body to io.Writer: %w", err)
+		var id string
+		if err := rows.Scan(&id); err != nil {
+			return nil, fmt.Errorf("scanning row: %w", err)
 		}
 
-		return nil
+		ids = append(ids, id)
 	}
 
-	buf := new(bytes.Buffer)
-	into = io.MultiWriter(into, buf)
-
-	if err := s.inner.Get(id, into); errors.Is(err, ErrAssetNotFound) {
-		s.m.Store(id, err)
-		return err
-	} else if err != nil {
-		return err
-	}
-
-	s.m.Store(id, buf.Bytes())
-	return nil
-}
-
-func (s *cachedAssetStore) Delete(id string) error {
-
-	if err := s.inner.Delete(id); err != nil {
-		return err
-	}
-
-	s.m.Delete(id)
-	return nil
+	return ids, nil
 }

srv/src/post/asset_test.go

@@ -65,16 +65,27 @@ func TestAssetStore(t *testing.T) {
 		assert.NoError(t, h.store.Delete("bar"))
 		h.assertNotFound(t, "foo")
 		h.assertNotFound(t, "bar")
+
+		// test list
+
+		ids, err := h.store.List()
+		assert.NoError(t, err)
+		assert.Empty(t, ids)
+
+		err = h.store.Set("foo", bytes.NewBufferString("FOOFOO"))
+		assert.NoError(t, err)
+		err = h.store.Set("foo", bytes.NewBufferString("FOOFOO"))
+		assert.NoError(t, err)
+		err = h.store.Set("bar", bytes.NewBufferString("FOOFOO"))
+		assert.NoError(t, err)
+
+		ids, err = h.store.List()
+		assert.NoError(t, err)
+		assert.Equal(t, []string{"bar", "foo"}, ids)
 	}
 
 	t.Run("sql", func(t *testing.T) {
 		h := newAssetTestHarness(t)
 		testAssetStore(t, h)
 	})
-
-	t.Run("mem", func(t *testing.T) {
-		h := newAssetTestHarness(t)
-		h.store = NewCachedAssetStore(h.store)
-		testAssetStore(t, h)
-	})
 }