From dd442ab9e90462d14e31fcc401577de826314879 Mon Sep 17 00:00:00 2001
From: Michael Mayer <michael@liquidbytes.net>
Date: Sat, 30 May 2020 01:41:47 +0200
Subject: [PATCH] Add moments #154

Signed-off-by: Michael Mayer <michael@liquidbytes.net>
---
 cmd/photoprism/photoprism.go                 |   1 +
 frontend/src/common/config.js                |  17 +--
 frontend/src/component/p-navigation.vue      |  18 ++-
 frontend/src/dialog/p-photo-album-dialog.vue |   1 +
 frontend/src/pages/album/photos.vue          |   2 +
 frontend/src/pages/albums.vue                |   9 +-
 frontend/src/routes.js                       |   6 +
 go.mod                                       |   1 +
 go.sum                                       |   4 +
 internal/api/album.go                        |  95 +++++++++------
 internal/api/album_test.go                   |   2 +-
 internal/api/folder.go                       |  31 +++--
 internal/api/index.go                        |   6 +
 internal/api/label.go                        |  70 +++++++----
 internal/api/photo_thumbnail.go              |  23 +++-
 internal/commands/moments.go                 |  51 ++++++++
 internal/config/client.go                    |  37 +++---
 internal/config/config.go                    |  11 --
 internal/entity/album.go                     |  84 ++++++++++++-
 internal/entity/const.go                     |   1 +
 internal/entity/photo_album.go               |   5 +
 internal/entity/photo_maintain.go            |   2 +-
 internal/form/photo_search.go                |  13 +-
 internal/form/search.go                      |  96 +--------------
 internal/form/serialize.go                   |  90 ++++++++++++++
 internal/maps/places/cache.go                |  14 ++-
 internal/maps/places/location.go             |  22 +++-
 internal/photoprism/moments.go               | 118 ++++++++++++++++++-
 internal/photoprism/moments_test.go          |  18 +++
 internal/query/albums.go                     |  24 +++-
 internal/query/albums_test.go                |   4 +-
 internal/query/counts.go                     |  74 ++++++++++++
 internal/query/moments.go                    |  16 +--
 internal/query/moments_test.go               |   6 +-
 internal/query/photo_search.go               |  12 +-
 internal/service/cache.go                    |  12 +-
 internal/service/service.go                  |   6 +-
 37 files changed, 755 insertions(+), 247 deletions(-)
 create mode 100644 internal/commands/moments.go
 create mode 100644 internal/photoprism/moments_test.go
 create mode 100644 internal/query/counts.go

diff --git a/cmd/photoprism/photoprism.go b/cmd/photoprism/photoprism.go
index 61616ccf4..9df659845 100644
--- a/cmd/photoprism/photoprism.go
+++ b/cmd/photoprism/photoprism.go
@@ -26,6 +26,7 @@ func main() {
 		commands.StopCommand,
 		commands.IndexCommand,
 		commands.ImportCommand,
+		commands.MomentsCommand,
 		commands.PurgeCommand,
 		commands.CopyCommand,
 		commands.ConvertCommand,
diff --git a/frontend/src/common/config.js b/frontend/src/common/config.js
index 84564f159..1e51a9e8a 100644
--- a/frontend/src/common/config.js
+++ b/frontend/src/common/config.js
@@ -86,14 +86,20 @@ class Config {
             case "videos":
                 this.values.count.videos += data.count;
                 break;
-            case "files":
-                this.values.count.files += data.count;
+            case "albums":
+                this.values.count.albums += data.count;
+                break;
+            case "moments":
+                this.values.count.moments += data.count;
+                break;
+            case "months":
+                this.values.count.months += data.count;
                 break;
             case "folders":
                 this.values.count.folders += data.count;
                 break;
-            case "moments":
-                this.values.count.moments += data.count;
+            case "files":
+                this.values.count.files += data.count;
                 break;
             case "favorites":
                 this.values.count.favorites += data.count;
@@ -104,9 +110,6 @@ class Config {
             case "private":
                 this.values.count.private += data.count;
                 break;
-            case "albums":
-                this.values.count.albums += data.count;
-                break;
             case "photos":
                 this.values.count.photos += data.count;
                 break;
diff --git a/frontend/src/component/p-navigation.vue b/frontend/src/component/p-navigation.vue
index dcd393f2d..1aef0ece4 100644
--- a/frontend/src/component/p-navigation.vue
+++ b/frontend/src/component/p-navigation.vue
@@ -142,7 +142,7 @@
                     </v-list-tile-content>
                 </v-list-tile>
 
-                <v-list-group v-if="!mini" prepend-icon="folder" no-action :append-icon="albumExpandIcon">
+                <v-list-group v-if="!mini" prepend-icon="folder" no-action>
                     <v-list-tile slot="activator" to="/albums" @click.stop="">
                         <v-list-tile-content>
                             <v-list-tile-title>
@@ -152,6 +152,22 @@
                         </v-list-tile-content>
                     </v-list-tile>
 
+                    <v-list-tile>
+                        <v-list-tile-content>
+                            <v-list-tile-title><translate key="Folders">Folders</translate>
+                                <span v-show="config.count.folders > 0"
+                                      class="p-navigation-count">{{ config.count.folders }}</span></v-list-tile-title>
+                        </v-list-tile-content>
+                    </v-list-tile>
+
+                    <v-list-tile>
+                        <v-list-tile-content>
+                            <v-list-tile-title><translate key="Months">Months</translate>
+                                <span v-show="config.count.months > 0"
+                                      class="p-navigation-count">{{ config.count.months }}</span></v-list-tile-title>
+                        </v-list-tile-content>
+                    </v-list-tile>
+
                     <v-list-tile v-for="(album, index) in config.albums"
                                  :key="index"
                                  :to="{ name: 'album', params: { uid: album.UID, slug: album.Slug } }">
diff --git a/frontend/src/dialog/p-photo-album-dialog.vue b/frontend/src/dialog/p-photo-album-dialog.vue
index 97b454e09..e9d02fe07 100644
--- a/frontend/src/dialog/p-photo-album-dialog.vue
+++ b/frontend/src/dialog/p-photo-album-dialog.vue
@@ -90,6 +90,7 @@
                     q: q,
                     count: 1000,
                     offset: 0,
+                    type: "album"
                 };
 
                 Album.search(params).then(response => {
diff --git a/frontend/src/pages/album/photos.vue b/frontend/src/pages/album/photos.vue
index 0525217c4..f32a2c02f 100644
--- a/frontend/src/pages/album/photos.vue
+++ b/frontend/src/pages/album/photos.vue
@@ -171,6 +171,7 @@
                     count: count,
                     offset: offset,
                     album: this.uid,
+                    filter: this.model.Filter ? this.model.Filter : "",
                     merged: true,
                 };
 
@@ -227,6 +228,7 @@
                     count: this.pageSize,
                     offset: this.offset,
                     album: this.uid,
+                    filter: this.model.Filter ? this.model.Filter : "",
                     merged: true,
                 };
 
diff --git a/frontend/src/pages/albums.vue b/frontend/src/pages/albums.vue
index c2e74c565..ec7d46c2e 100644
--- a/frontend/src/pages/albums.vue
+++ b/frontend/src/pages/albums.vue
@@ -76,7 +76,7 @@
                                     @contextmenu="onContextMenu($event, index)"
                                     :dark="selection.includes(album.UID)"
                                     :class="selection.includes(album.UID) ? 'elevation-10 ma-0 accent darken-1 white--text' : 'elevation-0 ma-1 accent lighten-3'"
-                                    :to="{name: 'album', params: {uid: album.UID, slug: album.Slug}}"
+                                    :to="{name: albumRoute(), params: {uid: album.UID, slug: album.Slug}}"
                             >
                                 <v-img
                                         :src="album.thumbnailUrl('tile_500')"
@@ -203,6 +203,13 @@
             };
         },
         methods: {
+            albumRoute() {
+                if(this.routeName === "moments") {
+                    return "moment";
+                }
+
+                return "album";
+            },
             selectRange(rangeEnd, models) {
                 if (!models || !models[rangeEnd] || !(models[rangeEnd] instanceof RestModel)) {
                     console.warn("selectRange() - invalid arguments:", rangeEnd, models);
diff --git a/frontend/src/routes.js b/frontend/src/routes.js
index c1e039676..78e7467d3 100644
--- a/frontend/src/routes.js
+++ b/frontend/src/routes.js
@@ -40,6 +40,12 @@ export default [
         meta: {title: "Moments", auth: true},
         props: {staticFilter: {type: "moment"}},
     },
+    {
+        name: "moment",
+        path: "/moment/:uid",
+        component: AlbumPhotos,
+        meta: {title: "Moment", auth: true},
+    },
     {
         name: "albums",
         path: "/albums",
diff --git a/go.mod b/go.mod
index e0682fc01..5dc50ea04 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,7 @@
 module github.com/photoprism/photoprism
 
 require (
+	github.com/allegro/bigcache v1.2.1
 	github.com/araddon/dateparse v0.0.0-20200409225146-d820a6159ab1
 	github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd // indirect
 	github.com/coreos/etcd v3.3.10+incompatible // indirect
diff --git a/go.sum b/go.sum
index 929fb9d10..5a9c391fd 100644
--- a/go.sum
+++ b/go.sum
@@ -5,6 +5,8 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5Vpd
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZqLG4oE62mJzwPIB8+Tee4RNCL9ulrY=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/allegro/bigcache v1.2.1 h1:hg1sY1raCwic3Vnsvje6TT7/pnZba83LeFck5NrFKSc=
+github.com/allegro/bigcache v1.2.1/go.mod h1:Cb/ax3seSYIx7SuZdm2G2xzfwmv3TPSk2ucNfQESPXM=
 github.com/apache/thrift v0.0.0-20161221203622-b2a4d4ae21c7 h1:Fv9bK1Q+ly/ROk4aJsVMeuIwPel4bEnD8EPiI91nZMg=
 github.com/apache/thrift v0.0.0-20161221203622-b2a4d4ae21c7/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/araddon/dateparse v0.0.0-20200409225146-d820a6159ab1 h1:TEBmxO80TM04L8IuMWk77SGL1HomBmKTdzdJLLWznxI=
@@ -84,6 +86,8 @@ github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.6.2 h1:88crIK23zO6TqlQBt+f9FrPJNKm9ZEr7qjp9vl/d5TM=
+github.com/gin-gonic/gin v1.6.2/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/gin-gonic/gin v1.6.3 h1:ahKqKTFpO5KTPHxWZjEdPScmYaGtLo8Y4DMHoEsnp14=
 github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/go-errors/errors v1.0.1 h1:LUHzmkK3GUKUrL/1gfBUxAHzcev3apQlezX/+O7ma6w=
diff --git a/internal/api/album.go b/internal/api/album.go
index c8367596a..0a532f9d8 100644
--- a/internal/api/album.go
+++ b/internal/api/album.go
@@ -2,11 +2,12 @@ package api
 
 import (
 	"archive/zip"
+	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -271,13 +272,15 @@ func AddPhotosToAlbum(router *gin.RouterGroup, conf *config.Config) {
 			return
 		}
 
-		var added []*entity.PhotoAlbum
+		var added []entity.PhotoAlbum
 
 		for _, p := range photos {
-			val := entity.FirstOrCreatePhotoAlbum(entity.NewPhotoAlbum(p.PhotoUID, a.AlbumUID))
+			pa := entity.PhotoAlbum{AlbumUID: a.AlbumUID, PhotoUID: p.PhotoUID, Hidden: false}
 
-			if val != nil {
-				added = append(added, val)
+			if err := pa.Save(); err != nil {
+				log.Errorf("album: %s", err.Error())
+			} else {
+				added = append(added, pa)
 			}
 		}
 
@@ -321,13 +324,18 @@ func RemovePhotosFromAlbum(router *gin.RouterGroup, conf *config.Config) {
 			return
 		}
 
-		entity.Db().Where("album_uid = ? AND photo_uid IN (?)", a.AlbumUID, f.Photos).Delete(&entity.PhotoAlbum{})
+		for _, photoUID := range f.Photos {
+			pa := entity.PhotoAlbum{AlbumUID: a.AlbumUID, PhotoUID: photoUID, Hidden: true}
+			logError("album", pa.Save())
+		}
 
-		event.Success(fmt.Sprintf("photos removed from %s", a.AlbumTitle))
+		// affected := entity.Db().Model(entity.PhotoAlbum{}).Where("album_uid = ? AND photo_uid IN (?)", a.AlbumUID, f.Photos).UpdateColumn("Hidden", true).RowsAffected
+
+		event.Success(fmt.Sprintf("entries removed from %s", a.AlbumTitle))
 
 		PublishAlbumEvent(EntityUpdated, a.AlbumUID, c)
 
-		c.JSON(http.StatusOK, gin.H{"message": "photos removed from album", "album": a, "photos": f.Photos})
+		c.JSON(http.StatusOK, gin.H{"message": "entries removed from album", "album": a, "photos": f.Photos})
 	})
 }
 
@@ -427,7 +435,7 @@ func DownloadAlbum(router *gin.RouterGroup, conf *config.Config) {
 func AlbumThumbnail(router *gin.RouterGroup, conf *config.Config) {
 	router.GET("/albums/:uid/t/:token/:type", func(c *gin.Context) {
 		if InvalidToken(c, conf) {
-			c.Data(http.StatusForbidden, "image/svg+xml", brokenIconSvg)
+			c.Data(http.StatusForbidden, "image/svg+xml", albumIconSvg)
 			return
 		}
 
@@ -438,24 +446,44 @@ func AlbumThumbnail(router *gin.RouterGroup, conf *config.Config) {
 		thumbType, ok := thumb.Types[typeName]
 
 		if !ok {
-			log.Errorf("album: invalid thumb type %s", typeName)
-			c.Data(http.StatusOK, "image/svg+xml", photoIconSvg)
+			log.Errorf("album-thumbnail: invalid type %s", typeName)
+			c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
 			return
 		}
 
-		gc := service.Cache()
+		cache := service.Cache()
 		cacheKey := fmt.Sprintf("album-thumbnail:%s:%s", uid, typeName)
 
-		if cacheData, ok := gc.Get(cacheKey); ok {
+		if cacheData, err := cache.Get(cacheKey); err == nil {
 			log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start))
-			c.Data(http.StatusOK, "image/jpeg", cacheData.([]byte))
+
+			var cached ThumbCache
+
+			if err := json.Unmarshal(cacheData, &cached); err != nil {
+				log.Errorf("album-thumbnail: %s not found", uid)
+				c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
+				return
+			}
+
+			if !fs.FileExists(cached.FileName) {
+				log.Errorf("album-thumbnail: %s not found", uid)
+				c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
+				return
+			}
+
+			if c.Query("download") != "" {
+				c.FileAttachment(cached.FileName, cached.ShareName)
+			} else {
+				c.File(cached.FileName)
+			}
+
 			return
 		}
 
-		f, err := query.AlbumThumbByUID(uid)
+		f, err := query.AlbumCoverByUID(uid)
 
 		if err != nil {
-			log.Debugf("album: no photos yet, using generic image for %s", uid)
+			log.Debugf("album-thumbnail: no photos yet, using generic image for %s", uid)
 			c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
 			return
 		}
@@ -463,18 +491,18 @@ func AlbumThumbnail(router *gin.RouterGroup, conf *config.Config) {
 		fileName := path.Join(conf.OriginalsPath(), f.FileName)
 
 		if !fs.FileExists(fileName) {
-			log.Errorf("album: could not find original for %s", fileName)
-			c.Data(http.StatusOK, "image/svg+xml", photoIconSvg)
+			log.Errorf("album-thumbnail: could not find original for %s", fileName)
+			c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
 
 			// Set missing flag so that the file doesn't show up in search results anymore.
-			log.Warnf("album: %s is missing", txt.Quote(f.FileName))
-			logError("album", f.Update("FileMissing", true))
+			log.Warnf("album-thumbnail: %s is missing", txt.Quote(f.FileName))
+			logError("album-thumbnail", f.Update("FileMissing", true))
 			return
 		}
 
 		// Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157
 		if thumbType.ExceedsLimit() && c.Query("download") == "" {
-			log.Debugf("album: using original, thumbnail size exceeds limit (width %d, height %d)", thumbType.Width, thumbType.Height)
+			log.Debugf("album-thumbnail: using original, size exceeds limit (width %d, height %d)", thumbType.Width, thumbType.Height)
 			c.File(fileName)
 			return
 		}
@@ -491,24 +519,21 @@ func AlbumThumbnail(router *gin.RouterGroup, conf *config.Config) {
 			log.Errorf("album: %s", err)
 			c.Data(http.StatusOK, "image/svg+xml", photoIconSvg)
 			return
-		}
-
-		if c.Query("download") != "" {
-			c.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", f.ShareFileName()))
-		}
-
-		thumbData, err := ioutil.ReadFile(thumbnail)
-
-		if err != nil {
-			log.Errorf("album: %s", err)
+		} else if thumbnail == "" {
+			log.Errorf("album-thumbnail: %s has empty thumb name - bug?", filepath.Base(fileName))
 			c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
 			return
 		}
 
-		gc.Set(cacheKey, thumbData, time.Hour)
+		if cached, err := json.Marshal(ThumbCache{thumbnail, f.ShareFileName()}); err == nil {
+			logError("album-thumbnail", cache.Set(cacheKey, cached))
+			log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
+		}
 
-		log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
-
-		c.Data(http.StatusOK, "image/jpeg", thumbData)
+		if c.Query("download") != "" {
+			c.FileAttachment(thumbnail, f.ShareFileName())
+		} else {
+			c.File(thumbnail)
+		}
 	})
 }
diff --git a/internal/api/album_test.go b/internal/api/album_test.go
index 2f19b5316..5ce055d09 100644
--- a/internal/api/album_test.go
+++ b/internal/api/album_test.go
@@ -222,7 +222,7 @@ func TestRemovePhotosFromAlbum(t *testing.T) {
 		RemovePhotosFromAlbum(router, conf)
 		r := PerformRequestWithBody(app, "DELETE", "/api/v1/albums/"+uid+"/photos", `{"photos": ["pt9jtdre2lvl0y12", "pt9jtdre2lvl0y11"]}`)
 		val := gjson.Get(r.Body.String(), "message")
-		assert.Equal(t, "photos removed from album", val.String())
+		assert.Equal(t, "entries removed from album", val.String())
 		assert.Equal(t, http.StatusOK, r.Code)
 	})
 	t.Run("no photos selected", func(t *testing.T) {
diff --git a/internal/api/folder.go b/internal/api/folder.go
index 276c63989..2e249ef3c 100644
--- a/internal/api/folder.go
+++ b/internal/api/folder.go
@@ -1,6 +1,7 @@
 package api
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/http"
 	"path/filepath"
@@ -31,20 +32,26 @@ func GetFolders(router *gin.RouterGroup, conf *config.Config, urlPath, rootName,
 		}
 
 		start := time.Now()
-		gc := service.Cache()
+		cache := service.Cache()
 		recursive := c.Query("recursive") != ""
 		listFiles := c.Query("files") != ""
-		cached := !listFiles && c.Query("uncached") == ""
-		resp := FoldersResponse{Root: rootName, Recursive: recursive, Cached: cached}
+		uncached := listFiles || c.Query("uncached") != ""
+		resp := FoldersResponse{Root: rootName, Recursive: recursive, Cached: !uncached}
 		path := c.Param("path")
 
 		cacheKey := fmt.Sprintf("folders:%s:%t:%t", filepath.Join(rootPath, path), recursive, listFiles)
 
-		if cached {
-			if cacheData, ok := gc.Get(cacheKey); ok {
-				log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start))
-				c.JSON(http.StatusOK, cacheData.(*FoldersResponse))
-				return
+		if !uncached {
+			if cacheData, err := cache.Get(cacheKey); err == nil {
+				var cached FoldersResponse
+
+				if err := json.Unmarshal(cacheData, &cached); err != nil {
+					log.Errorf("folders: %s", err)
+				} else {
+					log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start))
+					c.JSON(http.StatusOK, cached)
+					return
+				}
 			}
 		}
 
@@ -64,9 +71,11 @@ func GetFolders(router *gin.RouterGroup, conf *config.Config, urlPath, rootName,
 			}
 		}
 
-		if cached {
-			gc.Set(cacheKey, &resp, time.Minute*5)
-			log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
+		if !uncached {
+			if c, err := json.Marshal(resp); err == nil {
+				logError("folders", cache.Set(cacheKey, c))
+				log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
+			}
 		}
 
 		c.Header("X-Count", strconv.Itoa(len(resp.Files)+len(resp.Folders)))
diff --git a/internal/api/index.go b/internal/api/index.go
index f966656a3..3c23eeb45 100644
--- a/internal/api/index.go
+++ b/internal/api/index.go
@@ -64,6 +64,12 @@ func StartIndexing(router *gin.RouterGroup, conf *config.Config) {
 			event.Info(fmt.Sprintf("removed %d files and %d photos", len(files), len(photos)))
 		}
 
+		moments := service.Moments()
+
+		if err := moments.Start(); err != nil {
+			log.Error(err)
+		}
+
 		elapsed := int(time.Since(start).Seconds())
 
 		event.Success(fmt.Sprintf("indexing completed in %d s", elapsed))
diff --git a/internal/api/label.go b/internal/api/label.go
index 7679c82c7..8a4c10d91 100644
--- a/internal/api/label.go
+++ b/internal/api/label.go
@@ -1,10 +1,11 @@
 package api
 
 import (
+	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"path"
+	"path/filepath"
 	"strconv"
 	"time"
 
@@ -163,32 +164,52 @@ func DislikeLabel(router *gin.RouterGroup, conf *config.Config) {
 func LabelThumbnail(router *gin.RouterGroup, conf *config.Config) {
 	router.GET("/labels/:uid/t/:token/:type", func(c *gin.Context) {
 		if InvalidToken(c, conf) {
-			c.Data(http.StatusForbidden, "image/svg+xml", brokenIconSvg)
+			c.Data(http.StatusForbidden, "image/svg+xml", labelIconSvg)
 			return
 		}
 
 		start := time.Now()
 		typeName := c.Param("type")
-		labelUID := c.Param("uid")
+		uid := c.Param("uid")
 
 		thumbType, ok := thumb.Types[typeName]
 
 		if !ok {
-			log.Errorf("label: invalid thumb type %s", txt.Quote(typeName))
+			log.Errorf("label-thumbnail: invalid type %s", txt.Quote(typeName))
 			c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
 			return
 		}
 
-		gc := service.Cache()
-		cacheKey := fmt.Sprintf("label-thumbnail:%s:%s", labelUID, typeName)
+		cache := service.Cache()
+		cacheKey := fmt.Sprintf("label-thumbnail:%s:%s", uid, typeName)
 
-		if cacheData, ok := gc.Get(cacheKey); ok {
+		if cacheData, err := cache.Get(cacheKey); err == nil {
 			log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start))
-			c.Data(http.StatusOK, "image/jpeg", cacheData.([]byte))
+
+			var cached ThumbCache
+
+			if err := json.Unmarshal(cacheData, &cached); err != nil {
+				log.Errorf("label-thumbnail: %s not found", uid)
+				c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
+				return
+			}
+
+			if !fs.FileExists(cached.FileName) {
+				log.Errorf("label-thumbnail: %s not found", uid)
+				c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
+				return
+			}
+
+			if c.Query("download") != "" {
+				c.FileAttachment(cached.FileName, cached.ShareName)
+			} else {
+				c.File(cached.FileName)
+			}
+
 			return
 		}
 
-		f, err := query.LabelThumbByUID(labelUID)
+		f, err := query.LabelThumbByUID(uid)
 
 		if err != nil {
 			log.Errorf(err.Error())
@@ -199,18 +220,18 @@ func LabelThumbnail(router *gin.RouterGroup, conf *config.Config) {
 		fileName := path.Join(conf.OriginalsPath(), f.FileName)
 
 		if !fs.FileExists(fileName) {
-			log.Errorf("label: file %s is missing", txt.Quote(f.FileName))
+			log.Errorf("label-thumbnail: file %s is missing", txt.Quote(f.FileName))
 			c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
 
 			// Set missing flag so that the file doesn't show up in search results anymore.
-			logError("label", f.Update("FileMissing", true))
+			logError("label-thumbnail", f.Update("FileMissing", true))
 
 			return
 		}
 
 		// Use original file if thumb size exceeds limit, see https://github.com/photoprism/photoprism/issues/157
 		if thumbType.ExceedsLimit() {
-			log.Debugf("label: using original, thumbnail size exceeds limit (width %d, height %d)", thumbType.Width, thumbType.Height)
+			log.Debugf("label-thumbnail: using original, size exceeds limit (width %d, height %d)", thumbType.Width, thumbType.Height)
 
 			c.File(fileName)
 
@@ -226,23 +247,24 @@ func LabelThumbnail(router *gin.RouterGroup, conf *config.Config) {
 		}
 
 		if err != nil {
-			log.Errorf("label: %s", err)
+			log.Errorf("label-thumbnail: %s", err)
+			c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
+			return
+		} else if thumbnail == "" {
+			log.Errorf("label-thumbnail: %s has empty thumb name - bug?", filepath.Base(fileName))
 			c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
 			return
 		}
 
-		thumbData, err := ioutil.ReadFile(thumbnail)
-
-		if err != nil {
-			log.Errorf("label: %s", err)
-			c.Data(http.StatusOK, "image/svg+xml", labelIconSvg)
-			return
+		if cached, err := json.Marshal(ThumbCache{thumbnail, f.ShareFileName()}); err == nil {
+			logError("label-thumbnail", cache.Set(cacheKey, cached))
+			log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
 		}
 
-		gc.Set(cacheKey, thumbData, time.Hour*4)
-
-		log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
-
-		c.Data(http.StatusOK, "image/jpeg", thumbData)
+		if c.Query("download") != "" {
+			c.FileAttachment(thumbnail, f.ShareFileName())
+		} else {
+			c.File(thumbnail)
+		}
 	})
 }
diff --git a/internal/api/photo_thumbnail.go b/internal/api/photo_thumbnail.go
index c4bb4ce82..e17974b00 100644
--- a/internal/api/photo_thumbnail.go
+++ b/internal/api/photo_thumbnail.go
@@ -1,6 +1,7 @@
 package api
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/http"
 	"path"
@@ -21,6 +22,10 @@ type ThumbCache struct {
 	ShareName string
 }
 
+type ByteCache struct {
+	Data  []byte
+}
+
 // GET /api/v1/t/:hash/:token/:type
 //
 // Parameters:
@@ -45,13 +50,19 @@ func GetThumbnail(router *gin.RouterGroup, conf *config.Config) {
 			return
 		}
 
-		gc := service.Cache()
+		cache := service.Cache()
 		cacheKey := fmt.Sprintf("thumbnail:%s:%s", fileHash, typeName)
 
-		if cacheData, ok := gc.Get(cacheKey); ok {
+		if cacheData, err := cache.Get(cacheKey); err == nil {
 			log.Debugf("cache hit for %s [%s]", cacheKey, time.Since(start))
 
-			cached := cacheData.(*ThumbCache)
+			var cached ThumbCache
+
+			if err := json.Unmarshal(cacheData, &cached); err != nil {
+				log.Errorf("thumbnail: %s not found", fileHash)
+				c.Data(http.StatusOK, "image/svg+xml", albumIconSvg)
+				return
+			}
 
 			if !fs.FileExists(cached.FileName) {
 				log.Errorf("thumbnail: %s not found", fileHash)
@@ -137,8 +148,10 @@ func GetThumbnail(router *gin.RouterGroup, conf *config.Config) {
 		}
 
 		// Cache thumbnail filename.
-		gc.Set(cacheKey, &ThumbCache{thumbnail, f.ShareFileName()}, time.Hour*24)
-		log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
+		if cached, err := json.Marshal(ThumbCache{thumbnail, f.ShareFileName()}); err == nil {
+			logError("thumbnail", cache.Set(cacheKey, cached))
+			log.Debugf("cached %s [%s]", cacheKey, time.Since(start))
+		}
 
 		if c.Query("download") != "" {
 			c.FileAttachment(thumbnail, f.ShareFileName())
diff --git a/internal/commands/moments.go b/internal/commands/moments.go
new file mode 100644
index 000000000..c7bfeb137
--- /dev/null
+++ b/internal/commands/moments.go
@@ -0,0 +1,51 @@
+package commands
+
+import (
+	"context"
+	"time"
+
+	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/service"
+	"github.com/urfave/cli"
+)
+
+// MomentsCommand is used to register the index cli command
+var MomentsCommand = cli.Command{
+	Name:   "moments",
+	Usage:  "Creates albums based on popular locations, dates and labels",
+	Action: momentsAction,
+}
+
+// momentsAction creates albums based on popular locations, dates and labels.
+func momentsAction(ctx *cli.Context) error {
+	start := time.Now()
+
+	conf := config.NewConfig(ctx)
+	service.SetConfig(conf)
+
+	cctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	if err := conf.Init(cctx); err != nil {
+		return err
+	}
+
+	conf.InitDb()
+
+	if conf.ReadOnly() {
+		log.Infof("read-only mode enabled")
+	}
+
+	moments := service.Moments()
+
+	if err := moments.Start(); err != nil {
+		return err
+	} else {
+		elapsed := time.Since(start)
+
+		log.Infof("completed in %s", elapsed)
+	}
+
+	conf.Shutdown()
+
+	return nil
+}
diff --git a/internal/config/client.go b/internal/config/client.go
index 3e9f20a96..f434330be 100644
--- a/internal/config/client.go
+++ b/internal/config/client.go
@@ -48,23 +48,24 @@ type ClientConfig struct {
 }
 
 type ClientCounts struct {
-	Cameras        uint `json:"cameras"`
-	Lenses         uint `json:"lenses"`
-	Countries      uint `json:"countries"`
-	Photos         uint `json:"photos"`
-	Videos         uint `json:"videos"`
-	Hidden         uint `json:"hidden"`
-	Favorites      uint `json:"favorites"`
-	Private        uint `json:"private"`
-	Review         uint `json:"review"`
-	Stories        uint `json:"stories"`
-	Albums         uint `json:"albums"`
-	Folders        uint `json:"folders"`
-	Files          uint `json:"files"`
-	Moments        uint `json:"moments"`
-	Places         uint `json:"places"`
-	Labels         uint `json:"labels"`
-	LabelMaxPhotos uint `json:"labelMaxPhotos"`
+	Cameras        int `json:"cameras"`
+	Lenses         int `json:"lenses"`
+	Countries      int `json:"countries"`
+	Photos         int `json:"photos"`
+	Videos         int `json:"videos"`
+	Hidden         int `json:"hidden"`
+	Favorites      int `json:"favorites"`
+	Private        int `json:"private"`
+	Review         int `json:"review"`
+	Stories        int `json:"stories"`
+	Albums         int `json:"albums"`
+	Moments        int `json:"moments"`
+	Months         int `json:"months"`
+	Folders        int `json:"folders"`
+	Files          int `json:"files"`
+	Places         int `json:"places"`
+	Labels         int `json:"labels"`
+	LabelMaxPhotos int `json:"labelMaxPhotos"`
 }
 
 type CategoryLabel struct {
@@ -205,7 +206,7 @@ func (c *Config) ClientConfig() ClientConfig {
 		Take(&result.Count)
 
 	db.Table("albums").
-		Select("SUM(album_type = ?) AS albums, SUM(album_type = ?) AS moments, SUM(album_type = ?) AS folders", entity.TypeAlbum, entity.TypeMoment, entity.TypeFolder).
+		Select("SUM(album_type = ?) AS albums, SUM(album_type = ?) AS moments, SUM(album_type = ?) AS months, SUM(album_type = ?) AS folders", entity.TypeAlbum, entity.TypeMoment, entity.TypeMonth, entity.TypeFolder).
 		Where("deleted_at IS NULL").
 		Take(&result.Count)
 
diff --git a/internal/config/config.go b/internal/config/config.go
index 98ec2e317..90e59d009 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -9,7 +9,6 @@ import (
 	"github.com/jinzhu/gorm"
 	_ "github.com/jinzhu/gorm/dialects/mysql"
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
-	gc "github.com/patrickmn/go-cache"
 	"github.com/photoprism/photoprism/internal/event"
 	"github.com/photoprism/photoprism/internal/mutex"
 	"github.com/photoprism/photoprism/internal/thumb"
@@ -25,7 +24,6 @@ var once sync.Once
 type Config struct {
 	once     sync.Once
 	db       *gorm.DB
-	cache    *gc.Cache
 	params   *Params
 	settings *Settings
 	token    string
@@ -193,15 +191,6 @@ func (c *Config) LogLevel() logrus.Level {
 	}
 }
 
-// Cache returns the in-memory cache.
-func (c *Config) Cache() *gc.Cache {
-	if c.cache == nil {
-		c.cache = gc.New(336*time.Hour, 30*time.Minute)
-	}
-
-	return c.cache
-}
-
 // Shutdown services and workers.
 func (c *Config) Shutdown() {
 	mutex.MainWorker.Cancel()
diff --git a/internal/entity/album.go b/internal/entity/album.go
index f47009c50..92496f670 100644
--- a/internal/entity/album.go
+++ b/internal/entity/album.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/gosimple/slug"
 	"github.com/jinzhu/gorm"
+	"github.com/photoprism/photoprism/internal/event"
 	"github.com/photoprism/photoprism/internal/form"
 	"github.com/photoprism/photoprism/pkg/rnd"
 	"github.com/photoprism/photoprism/pkg/txt"
@@ -69,6 +70,62 @@ func NewAlbum(albumTitle, albumType string) *Album {
 	return result
 }
 
+// NewMoment creates a new moment.
+func NewMoment(albumTitle, albumSlug, albumFilter string) *Album {
+	if albumTitle == "" || albumSlug == "" || albumFilter == "" {
+		return nil
+	}
+
+	now := time.Now().UTC()
+
+	result := &Album{
+		AlbumUID:    rnd.PPID('a'),
+		AlbumOrder:  SortOrderOldest,
+		AlbumType:   TypeMoment,
+		AlbumTitle:  albumTitle,
+		AlbumSlug:   albumSlug,
+		AlbumFilter: albumFilter,
+		CreatedAt:   now,
+		UpdatedAt:   now,
+	}
+
+	return result
+}
+
+// NewMonth creates a new month album.
+func NewMonth(albumTitle, albumSlug string, year, month int) *Album {
+	if albumTitle == "" || albumSlug == "" || year == 0 || month == 0 {
+		return nil
+	}
+
+	f := form.PhotoSearch{
+		Year:  year,
+		Month: month,
+	}
+
+	now := time.Now().UTC()
+
+	result := &Album{
+		AlbumUID:    rnd.PPID('a'),
+		AlbumOrder:  SortOrderOldest,
+		AlbumType:   TypeMonth,
+		AlbumTitle:  albumTitle,
+		AlbumSlug:   albumSlug,
+		AlbumFilter: f.Serialize(),
+		AlbumYear:   year,
+		AlbumMonth:  month,
+		CreatedAt:   now,
+		UpdatedAt:   now,
+	}
+
+	return result
+}
+
+// Checks if the album is of type moment.
+func (m *Album) IsMoment() bool {
+	return m.AlbumType == TypeMoment
+}
+
 // SetTitle changes the album name.
 func (m *Album) SetTitle(title string) {
 	title = strings.TrimSpace(title)
@@ -111,5 +168,30 @@ func (m *Album) Save() error {
 
 // Create inserts a new row to the database.
 func (m *Album) Create() error {
-	return Db().Create(m).Error
+	if err := Db().Create(m).Error; err != nil {
+		return err
+	}
+
+	switch m.AlbumType {
+	case TypeAlbum:
+		event.Publish("count.albums", event.Data{"count": 1})
+	case TypeMoment:
+		event.Publish("count.moments", event.Data{"count": 1})
+	case TypeMonth:
+		event.Publish("count.months", event.Data{"count": 1})
+	case TypeFolder:
+		event.Publish("count.folders", event.Data{"count": 1})
+	}
+	return nil
+}
+
+// FindAlbum finds a matching album or returns nil.
+func FindAlbum(slug string) *Album {
+	result := Album{}
+
+	if err := Db().Where("album_slug = ?", slug).First(&result).Error; err != nil {
+		return nil
+	}
+
+	return &result
 }
diff --git a/internal/entity/const.go b/internal/entity/const.go
index 68063e121..13e9ec5fb 100644
--- a/internal/entity/const.go
+++ b/internal/entity/const.go
@@ -31,6 +31,7 @@ const (
 	TypeAlbum   = "album"
 	TypeFolder  = "folder"
 	TypeMoment  = "moment"
+	TypeMonth   = "month"
 	TypeImage   = "image"
 	TypeLive    = "live"
 	TypeVideo   = "video"
diff --git a/internal/entity/photo_album.go b/internal/entity/photo_album.go
index 4ec0686e0..41e91fb48 100644
--- a/internal/entity/photo_album.go
+++ b/internal/entity/photo_album.go
@@ -36,6 +36,11 @@ func (m *PhotoAlbum) Create() error {
 	return Db().Create(m).Error
 }
 
+// Save updates or inserts a row.
+func (m *PhotoAlbum) Save() error {
+	return Db().Save(m).Error
+}
+
 // FirstOrCreatePhotoAlbum returns the existing row, inserts a new row or nil in case of errors.
 func FirstOrCreatePhotoAlbum(m *PhotoAlbum) *PhotoAlbum {
 	result := PhotoAlbum{}
diff --git a/internal/entity/photo_maintain.go b/internal/entity/photo_maintain.go
index 76780af7e..2698347ad 100644
--- a/internal/entity/photo_maintain.go
+++ b/internal/entity/photo_maintain.go
@@ -14,7 +14,7 @@ func (m *Photo) EstimatePosition() {
 	var recentPhoto Photo
 
 	if result := UnscopedDb().
-		Where("place_id <> '' AND place_id <> 'zz'").
+		Where("place_id <> '' AND place_id <> 'zz' AND loc_src <> '' AND loc_src <> ?", SrcEstimate).
 		Order(gorm.Expr("ABS(DATEDIFF(taken_at, ?)) ASC", m.TakenAt)).
 		Preload("Place").First(&recentPhoto); result.Error == nil {
 		if recentPhoto.HasPlace() {
diff --git a/internal/form/photo_search.go b/internal/form/photo_search.go
index 8b24c0603..87ad93b42 100644
--- a/internal/form/photo_search.go
+++ b/internal/form/photo_search.go
@@ -7,6 +7,7 @@ import (
 // PhotoSearch represents search form fields for "/api/v1/photos".
 type PhotoSearch struct {
 	Query     string    `form:"q"`
+	Filter    string    `form:"filter"`
 	ID        string    `form:"id"`
 	Type      string    `form:"type"`
 	Path      string    `form:"path"`
@@ -62,13 +63,21 @@ func (f *PhotoSearch) SetQuery(q string) {
 }
 
 func (f *PhotoSearch) ParseQueryString() error {
-	err := ParseQueryString(f)
+	if err := ParseQueryString(f); err != nil {
+		return err
+	}
 
 	if f.Path == "" && f.Folder != "" {
 		f.Path = f.Folder
 	}
 
-	return err
+	if f.Filter != "" {
+		if err := Unserialize(f, f.Filter); err != nil {
+			return err
+		}
+	}
+
+	return nil
 }
 
 // Serialize returns a string containing non-empty fields and values of a struct.
diff --git a/internal/form/search.go b/internal/form/search.go
index 9af3c184b..5628aa29c 100644
--- a/internal/form/search.go
+++ b/internal/form/search.go
@@ -1,106 +1,12 @@
 package form
 
-import (
-	"fmt"
-	"reflect"
-	"strconv"
-	"strings"
-	"time"
-	"unicode"
-
-	"github.com/photoprism/photoprism/pkg/txt"
-
-	"github.com/araddon/dateparse"
-)
-
 type SearchForm interface {
 	GetQuery() string
 	SetQuery(q string)
 }
 
 func ParseQueryString(f SearchForm) (result error) {
-	var key, value []rune
-	var escaped, isKeyValue bool
-
 	q := f.GetQuery()
 
-	f.SetQuery("")
-
-	formValues := reflect.ValueOf(f).Elem()
-
-	q = strings.TrimSpace(q) + "\n"
-
-	var queryStrings []string
-
-	for _, char := range q {
-		if unicode.IsSpace(char) && !escaped {
-			if isKeyValue {
-				fieldName := strings.Title(string(key))
-				field := formValues.FieldByName(fieldName)
-				stringValue := string(value)
-
-				if field.CanSet() {
-					switch field.Interface().(type) {
-					case time.Time:
-						if timeValue, err := dateparse.ParseAny(stringValue); err != nil {
-							result = err
-						} else {
-							field.Set(reflect.ValueOf(timeValue))
-						}
-					case float32, float64:
-						if floatValue, err := strconv.ParseFloat(stringValue, 64); err != nil {
-							result = err
-						} else {
-							field.SetFloat(floatValue)
-						}
-					case int, int8, int16, int32, int64:
-						if intValue, err := strconv.Atoi(stringValue); err != nil {
-							result = err
-						} else {
-							field.SetInt(int64(intValue))
-						}
-					case uint, uint8, uint16, uint32, uint64:
-						if intValue, err := strconv.Atoi(stringValue); err != nil {
-							result = err
-						} else {
-							field.SetUint(uint64(intValue))
-						}
-					case string:
-						field.SetString(stringValue)
-					case bool:
-						field.SetBool(txt.Bool(stringValue))
-					default:
-						result = fmt.Errorf("unsupported type: %s", fieldName)
-					}
-				} else {
-					result = fmt.Errorf("unknown filter: %s", fieldName)
-				}
-			} else if len(strings.TrimSpace(string(key))) > 0 {
-				queryStrings = append(queryStrings, strings.TrimSpace(string(key)))
-			}
-
-			escaped = false
-			isKeyValue = false
-			key = key[:0]
-			value = value[:0]
-		} else if char == ':' {
-			isKeyValue = true
-		} else if char == '"' {
-			escaped = !escaped
-		} else if isKeyValue {
-			value = append(value, char)
-		} else {
-			key = append(key, unicode.ToLower(char))
-		}
-	}
-
-	if len(queryStrings) > 0 {
-		f.SetQuery(strings.Join(queryStrings, " "))
-	}
-
-	if result != nil {
-		log.Errorf("error while parsing search form: %s", result)
-	}
-
-	return result
+	return Unserialize(f, q)
 }
diff --git a/internal/form/serialize.go b/internal/form/serialize.go
index 2a3c56464..6b60434d4 100644
--- a/internal/form/serialize.go
+++ b/internal/form/serialize.go
@@ -3,8 +3,13 @@ package form
 import (
 	"fmt"
 	"reflect"
+	"strconv"
 	"strings"
 	"time"
+	"unicode"
+
+	"github.com/araddon/dateparse"
+	"github.com/photoprism/photoprism/pkg/txt"
 )
 
 // Serialize returns a string containing all non-empty fields and values of a struct.
@@ -70,3 +75,88 @@ func Serialize(f interface{}, all bool) string {
 
 	return strings.Join(q, " ")
 }
+
+func Unserialize(f SearchForm, q string)  (result error){
+	var key, value []rune
+	var escaped, isKeyValue bool
+
+	f.SetQuery("")
+
+	formValues := reflect.ValueOf(f).Elem()
+
+	q = strings.TrimSpace(q) + "\n"
+
+	var queryStrings []string
+
+	for _, char := range q {
+		if unicode.IsSpace(char) && !escaped {
+			if isKeyValue {
+				fieldName := strings.Title(string(key))
+				field := formValues.FieldByName(fieldName)
+				stringValue := string(value)
+
+				if field.CanSet() {
+					switch field.Interface().(type) {
+					case time.Time:
+						if timeValue, err := dateparse.ParseAny(stringValue); err != nil {
+							result = err
+						} else {
+							field.Set(reflect.ValueOf(timeValue))
+						}
+					case float32, float64:
+						if floatValue, err := strconv.ParseFloat(stringValue, 64); err != nil {
+							result = err
+						} else {
+							field.SetFloat(floatValue)
+						}
+					case int, int8, int16, int32, int64:
+						if intValue, err := strconv.Atoi(stringValue); err != nil {
+							result = err
+						} else {
+							field.SetInt(int64(intValue))
+						}
+					case uint, uint8, uint16, uint32, uint64:
+						if intValue, err := strconv.Atoi(stringValue); err != nil {
+							result = err
+						} else {
+							field.SetUint(uint64(intValue))
+						}
+					case string:
+						field.SetString(stringValue)
+					case bool:
+						field.SetBool(txt.Bool(stringValue))
+					default:
+						result = fmt.Errorf("unsupported type: %s", fieldName)
+					}
+				} else {
+					result = fmt.Errorf("unknown filter: %s", fieldName)
+				}
+			} else if len(strings.TrimSpace(string(key))) > 0 {
+				queryStrings = append(queryStrings, strings.TrimSpace(string(key)))
+			}
+
+			escaped = false
+			isKeyValue = false
+			key = key[:0]
+			value = value[:0]
+		} else if char == ':' {
+			isKeyValue = true
+		} else if char == '"' {
+			escaped = !escaped
+		} else if isKeyValue {
+			value = append(value, char)
+		} else {
+			key = append(key, unicode.ToLower(char))
+		}
+	}
+
+	if len(queryStrings) > 0 {
+		f.SetQuery(strings.Join(queryStrings, " "))
+	}
+
+	if result != nil {
+		log.Errorf("error while parsing form values: %s", result)
+	}
+
+	return result
+}
diff --git a/internal/maps/places/cache.go b/internal/maps/places/cache.go
index 0b457e042..0bccb5522 100644
--- a/internal/maps/places/cache.go
+++ b/internal/maps/places/cache.go
@@ -3,7 +3,17 @@ package places
 import (
 	"time"
 
-	gc "github.com/patrickmn/go-cache"
+	"github.com/allegro/bigcache"
 )
 
-var cache = gc.New(15*time.Minute, 5*time.Minute)
+var cache *bigcache.BigCache
+
+func init() {
+	var err error
+
+	cache, err = bigcache.NewBigCache(bigcache.DefaultConfig(time.Hour))
+
+	if err != nil {
+		log.Errorf("")
+	}
+}
diff --git a/internal/maps/places/location.go b/internal/maps/places/location.go
index 12a7f8e80..839948e2a 100644
--- a/internal/maps/places/location.go
+++ b/internal/maps/places/location.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	gc "github.com/patrickmn/go-cache"
 	"github.com/photoprism/photoprism/pkg/s2"
 	"github.com/photoprism/photoprism/pkg/txt"
 )
@@ -46,17 +45,22 @@ func FindLocation(id string) (result Location, err error) {
 		return result, fmt.Errorf("api: invalid location id %s (%s)", id, ApiName)
 	}
 
+	start := time.Now()
 	lat, lng := s2.LatLng(id)
 
 	if lat == 0.0 || lng == 0.0 {
 		return result, fmt.Errorf("api: skipping lat %f, lng %f (%s)", lat, lng, ApiName)
 	}
 
-	if hit, ok := cache.Get(id); ok {
+	if hit, err := cache.Get(id); err == nil {
 		log.Debugf("api: cache hit for lat %f, lng %f (%s)", lat, lng, ApiName)
-		cached := hit.(*Location)
-		cached.Cached = true
-		return *cached, nil
+		var cached Location
+		if err := json.Unmarshal(hit, &cached); err != nil {
+			log.Errorf("api: %s (%s)", err.Error(), ApiName)
+		} else {
+			cached.Cached = true
+			return cached, nil
+		}
 	}
 
 	url := fmt.Sprintf(ReverseLookupURL, id)
@@ -101,7 +105,13 @@ func FindLocation(id string) (result Location, err error) {
 		return result, fmt.Errorf("api: no result for %s (%s)", id, ApiName)
 	}
 
-	cache.Set(id, &result, gc.DefaultExpiration)
+	if cached, err := json.Marshal(result); err == nil {
+		if err := cache.Set(id, cached); err != nil {
+			log.Errorf("api: %s (%s)", id, ApiName)
+		} else {
+			log.Debugf("cached %s [%s]", id, time.Since(start))
+		}
+	}
 
 	result.Cached = false
 
diff --git a/internal/photoprism/moments.go b/internal/photoprism/moments.go
index 37ccc75ba..614004d63 100644
--- a/internal/photoprism/moments.go
+++ b/internal/photoprism/moments.go
@@ -2,14 +2,20 @@ package photoprism
 
 import (
 	"fmt"
+	"math"
 	"runtime"
+	"strings"
 
 	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/entity"
 	"github.com/photoprism/photoprism/internal/event"
+	"github.com/photoprism/photoprism/internal/form"
 	"github.com/photoprism/photoprism/internal/mutex"
+	"github.com/photoprism/photoprism/internal/query"
+	"github.com/photoprism/photoprism/pkg/txt"
 )
 
-// Moments represents a worker that creates albums based on popular locations, dates and categories.
+// Moments represents a worker that creates albums based on popular locations, dates and labels.
 type Moments struct {
 	conf *config.Config
 }
@@ -47,6 +53,116 @@ func (m *Moments) Start() (err error) {
 		}
 	}()
 
+	counts := query.Counts{}
+	counts.Refresh()
+
+	threshold := int(math.Log2(float64(counts.Photos))) + 1
+
+	log.Infof("moments: threshold %d / %d", threshold, counts.Photos)
+
+	// Important years and months.
+	if results, err := query.MomentsTime(threshold); err != nil {
+		log.Errorf("moments: %s", err.Error())
+	} else {
+		for _, mom := range results {
+			if a := entity.FindAlbum(mom.Slug()); a != nil {
+				log.Infof("moments: %s already exists (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+			} else if a := entity.NewMonth(mom.Title(), mom.Slug(), mom.Year, mom.Month); a != nil {
+				if err := a.Create(); err != nil {
+					log.Errorf("moments: %s", err)
+				} else {
+					log.Infof("moments: added %s (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+				}
+			}
+		}
+	}
+
+	// Countries by year.
+	if results, err := query.MomentsCountries(threshold); err != nil {
+		log.Errorf("moments: %s", err.Error())
+	} else {
+		for _, mom := range results {
+			f := form.PhotoSearch{
+				Country: mom.Country,
+				Year:    mom.Year,
+			}
+
+			if a := entity.FindAlbum(mom.Slug()); a != nil {
+				log.Infof("moments: %s already exists (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+			} else if a := entity.NewMoment(mom.Title(), mom.Slug(), f.Serialize()); a != nil {
+				a.AlbumYear = mom.Year
+				a.AlbumCountry = mom.Country
+
+				if err := a.Create(); err != nil {
+					log.Errorf("moments: %s", err)
+				} else {
+					log.Infof("moments: added %s (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+				}
+			}
+		}
+	}
+
+	// States and countries.
+	if results, err := query.MomentsStates(threshold); err != nil {
+		log.Errorf("moments: %s", err.Error())
+	} else {
+		for _, mom := range results {
+			f := form.PhotoSearch{
+				Country: mom.Country,
+				State:   mom.State,
+			}
+
+			if a := entity.FindAlbum(mom.Slug()); a != nil {
+				log.Infof("moments: %s already exists (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+			} else if a := entity.NewMoment(mom.Title(), mom.Slug(), f.Serialize()); a != nil {
+				a.AlbumCountry = mom.Country
+
+				if err := a.Create(); err != nil {
+					log.Errorf("moments: %s", err)
+				} else {
+					log.Infof("moments: added %s (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+				}
+			}
+		}
+	}
+
+	// Popular labels.
+	if results, err := query.MomentsLabels(threshold); err != nil {
+		log.Errorf("moments: %s", err.Error())
+	} else {
+		for _, mom := range results {
+			f := form.PhotoSearch{
+				Label: mom.Label,
+			}
+
+			if a := entity.FindAlbum(mom.Slug()); a != nil {
+				log.Infof("moments: %s already exists (%s)", txt.Quote(mom.Title()), f.Serialize())
+
+				if err := form.ParseQueryString(&f); err != nil {
+					log.Errorf("moments: %s", err.Error())
+				} else {
+					w := txt.Words(f.Label)
+					w = append(w, mom.Label)
+					f.Label = strings.Join(txt.UniqueWords(w), ",")
+				}
+
+				if err := a.Update("AlbumFilter", f.Serialize()); err != nil {
+					log.Errorf("moments: %s", err.Error())
+				} else {
+					log.Infof("moments: updated %s (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+				}
+			} else if a := entity.NewMoment(mom.Title(), mom.Slug(), f.Serialize()); a != nil {
+				if err := a.Create(); err != nil {
+					log.Errorf("moments: %s", err.Error())
+				} else {
+					log.Infof("moments: added %s (%s)", txt.Quote(a.AlbumTitle), a.AlbumFilter)
+				}
+			} else {
+				log.Errorf("moments: failed to create new moment %s (%s)", mom.Title(), f.Serialize())
+			}
+		}
+	}
+
 	return nil
 }
 
diff --git a/internal/photoprism/moments_test.go b/internal/photoprism/moments_test.go
new file mode 100644
index 000000000..43a50584e
--- /dev/null
+++ b/internal/photoprism/moments_test.go
@@ -0,0 +1,18 @@
+package photoprism
+
+import (
+	"testing"
+
+	"github.com/photoprism/photoprism/internal/config"
+)
+
+func TestMoments_Start(t *testing.T) {
+	conf := config.TestConfig()
+
+	m := NewMoments(conf)
+	err := m.Start()
+
+	if err != nil {
+		t.Fatal(err)
+	}
+}
diff --git a/internal/query/albums.go b/internal/query/albums.go
index f094d6fc9..c56c30996 100644
--- a/internal/query/albums.go
+++ b/internal/query/albums.go
@@ -47,8 +47,26 @@ func AlbumByUID(albumUID string) (album entity.Album, err error) {
 	return album, nil
 }
 
-// AlbumThumbByUID returns a album preview file based on the uid.
-func AlbumThumbByUID(albumUID string) (file entity.File, err error) {
+// AlbumCoverByUID returns a album preview file based on the uid.
+func AlbumCoverByUID(albumUID string) (file entity.File, err error) {
+	a := entity.Album{}
+
+	if err := Db().Where("album_uid = ?", albumUID).First(&a).Error; err != nil {
+		return file, err
+	} else if a.IsMoment() { // TODO: Optimize
+		f := form.PhotoSearch{Album: a.AlbumUID, Filter: a.AlbumFilter, Order: entity.SortOrderRelevance, Count: 1, Offset: 0, Merged: true}
+
+		if photos, _, err := PhotoSearch(f); err != nil {
+			return file, err
+		} else if len(photos) > 0 {
+			for _, photo := range photos {
+				return FileByPhotoUID(photo.PhotoUID)
+			}
+		}
+
+		return file, fmt.Errorf("found no cover for moment")
+	}
+
 	if err := Db().
 		Where("files.file_primary = 1 AND files.file_missing = 0 AND files.file_type = 'jpg' AND files.deleted_at IS NULL").
 		Joins("JOIN albums ON albums.album_uid = ?", albumUID).
@@ -112,7 +130,7 @@ func AlbumSearch(f form.AlbumSearch) (results []AlbumResult, err error) {
 	case "slug":
 		s = s.Order("albums.album_favorite DESC, album_slug ASC")
 	default:
-		s = s.Order("albums.album_favorite DESC, photo_count DESC, albums.created_at DESC")
+		s = s.Order("albums.album_favorite DESC, albums.album_year DESC, albums.album_month DESC, albums.album_title, albums.created_at DESC")
 	}
 
 	if f.Count > 0 && f.Count <= 1000 {
diff --git a/internal/query/albums_test.go b/internal/query/albums_test.go
index b32b00f9e..c187794ac 100644
--- a/internal/query/albums_test.go
+++ b/internal/query/albums_test.go
@@ -27,7 +27,7 @@ func TestAlbumByUID(t *testing.T) {
 
 func TestAlbumThumbByUID(t *testing.T) {
 	t.Run("existing uid", func(t *testing.T) {
-		file, err := AlbumThumbByUID("at9lxuqxpogaaba8")
+		file, err := AlbumCoverByUID("at9lxuqxpogaaba8")
 
 		if err != nil {
 			t.Fatal(err)
@@ -37,7 +37,7 @@ func TestAlbumThumbByUID(t *testing.T) {
 	})
 
 	t.Run("not existing uid", func(t *testing.T) {
-		file, err := AlbumThumbByUID("3765")
+		file, err := AlbumCoverByUID("3765")
 		assert.Error(t, err, "record not found")
 		t.Log(file)
 	})
diff --git a/internal/query/counts.go b/internal/query/counts.go
new file mode 100644
index 000000000..7bc46677f
--- /dev/null
+++ b/internal/query/counts.go
@@ -0,0 +1,74 @@
+package query
+
+import "github.com/photoprism/photoprism/internal/entity"
+
+type Counts struct {
+	Cameras        int `json:"cameras"`
+	Lenses         int `json:"lenses"`
+	Countries      int `json:"countries"`
+	Photos         int `json:"photos"`
+	Videos         int `json:"videos"`
+	Hidden         int `json:"hidden"`
+	Favorites      int `json:"favorites"`
+	Private        int `json:"private"`
+	Review         int `json:"review"`
+	Stories        int `json:"stories"`
+	Albums         int `json:"albums"`
+	Folders        int `json:"folders"`
+	Files          int `json:"files"`
+	Moments        int `json:"moments"`
+	Places         int `json:"places"`
+	Labels         int `json:"labels"`
+	LabelMaxPhotos int `json:"labelMaxPhotos"`
+}
+
+func (c *Counts) Refresh() {
+	Db().Table("cameras").
+		Where("camera_slug <> 'zz' AND camera_slug <> ''").
+		Select("COUNT(*) AS cameras").
+		Take(c)
+
+	Db().Table("lenses").
+		Where("lens_slug <> 'zz' AND lens_slug <> ''").
+		Select("COUNT(*) AS lenses").
+		Take(c)
+
+	Db().Table("photos").
+		Select("SUM(photo_type = 'video' AND photo_quality >= 0 AND photo_private = 0) AS videos, SUM(photo_type IN ('image','raw','live') AND photo_quality < 3 AND photo_quality >= 0 AND photo_private = 0) AS review, SUM(photo_quality = -1) AS hidden, SUM(photo_type IN ('image','raw','live') AND photo_private = 0 AND photo_quality >= 0) AS photos, SUM(photo_favorite = 1 AND photo_quality >= 0) AS favorites, SUM(photo_private = 1 AND photo_quality >= 0) AS private").
+		Where("photos.id NOT IN (SELECT photo_id FROM files WHERE file_primary = 1 AND (file_missing = 1 OR file_error <> ''))").
+		Where("deleted_at IS NULL").
+		Take(c)
+
+	Db().Table("labels").
+		Select("MAX(photo_count) as label_max_photos, COUNT(*) AS labels").
+		Where("photo_count > 0").
+		Where("deleted_at IS NULL").
+		Where("(label_priority >= 0 || label_favorite = 1)").
+		Take(c)
+
+	Db().Table("albums").
+		Select("SUM(album_type = ?) AS albums, SUM(album_type = ?) AS moments, SUM(album_type = ?) AS folders", entity.TypeAlbum, entity.TypeMoment, entity.TypeFolder).
+		Where("deleted_at IS NULL").
+		Take(c)
+
+	Db().Table("files").
+		Select("COUNT(*) AS files").
+		Where("file_missing = 0").
+		Where("deleted_at IS NULL").
+		Take(c)
+
+	Db().Table("countries").
+		Select("(COUNT(*) - 1) AS countries").
+		Take(c)
+
+	Db().Table("places").
+		Select("SUM(photo_count > 0) AS places").
+		Where("id != 'zz'").
+		Take(c)
+
+	Db().Table("photos").
+		Select("SUM(photo_type = 'video' AND photo_quality >= 0 AND photo_private = 0) AS videos, SUM(photo_type IN ('image','raw','live') AND photo_quality < 3 AND photo_quality >= 0 AND photo_private = 0) AS review, SUM(photo_quality = -1) AS hidden, SUM(photo_type IN ('image','raw','live') AND photo_private = 0 AND photo_quality >= 0) AS photos, SUM(photo_favorite = 1 AND photo_quality >= 0) AS favorites, SUM(photo_private = 1 AND photo_quality >= 0) AS private").
+		Where("photos.id NOT IN (SELECT photo_id FROM files WHERE file_primary = 1 AND (file_missing = 1 OR file_error <> ''))").
+		Where("deleted_at IS NULL").
+		Take(c)
+}
diff --git a/internal/query/moments.go b/internal/query/moments.go
index d1b16ebfc..8d8db11f9 100644
--- a/internal/query/moments.go
+++ b/internal/query/moments.go
@@ -11,7 +11,7 @@ import (
 
 // Moment contains photo counts per month and year
 type Moment struct {
-	Category   string `json:"Category"`
+	Label      string `json:"Label"`
 	Country    string `json:"Country"`
 	State      string `json:"State"`
 	Year       int    `json:"Year"`
@@ -19,7 +19,7 @@ type Moment struct {
 	PhotoCount int    `json:"PhotoCount"`
 }
 
-var MomentCategory = map[string]string{
+var MomentLabels = map[string]string{
 	"botanical-garden": "Botanical Gardens",
 	"nature-reserve":   "Nature & Landscape",
 	"landscape":        "Nature & Landscape",
@@ -37,8 +37,8 @@ func (m Moment) Slug() string {
 // Title returns an english title for the moment.
 func (m Moment) Title() string {
 	if m.Year == 0 && m.Month == 0 {
-		if m.Category != "" {
-			return MomentCategory[m.Category]
+		if m.Label != "" {
+			return MomentLabels[m.Label]
 		}
 
 		country := maps.CountryName(m.Country)
@@ -129,16 +129,16 @@ func MomentsStates(threshold int) (results Moments, err error) {
 	return results, nil
 }
 
-// MomentsCategories returns the most popular photo categories.
-func MomentsCategories(threshold int) (results Moments, err error) {
+// MomentsLabels returns the most popular photo labels.
+func MomentsLabels(threshold int) (results Moments, err error) {
 	var cats []string
 
-	for cat, _ := range MomentCategory {
+	for cat, _ := range MomentLabels {
 		cats = append(cats, cat)
 	}
 
 	db := UnscopedDb().Table("photos").
-		Select("l.label_slug AS category, COUNT(*) AS photo_count").
+		Select("l.label_slug AS label, COUNT(*) AS photo_count").
 		Joins("JOIN photos_labels pl ON pl.photo_id = photos.id AND pl.uncertainty < 100").
 		Joins("JOIN labels l ON l.id = pl.label_id").
 		Where("photos.photo_quality >= 3 AND photos.deleted_at IS NULL AND l.label_slug IN (?)", cats).
diff --git a/internal/query/moments_test.go b/internal/query/moments_test.go
index 246b89fb6..ce24297f8 100644
--- a/internal/query/moments_test.go
+++ b/internal/query/moments_test.go
@@ -86,20 +86,20 @@ func TestMomentsStates(t *testing.T) {
 
 func TestMomentsCategories(t *testing.T) {
 	t.Run("result found", func(t *testing.T) {
-		results, err := MomentsCategories(1)
+		results, err := MomentsLabels(1)
 
 		if err != nil {
 			t.Fatal(err)
 		}
 
-		t.Logf("MomentsCategories %+v", results)
+		t.Logf("MomentsLabels %+v", results)
 
 		if len(results) < 1 {
 			t.Error("at least one result expected")
 		}
 
 		for _, moment := range results {
-			assert.NotEmpty(t, moment.Category)
+			assert.NotEmpty(t, moment.Label)
 			assert.Empty(t, moment.Country)
 			assert.Empty(t, moment.State)
 			assert.Equal(t, moment.Year, 0)
diff --git a/internal/query/photo_search.go b/internal/query/photo_search.go
index 43828cbb6..f9b8f050a 100644
--- a/internal/query/photo_search.go
+++ b/internal/query/photo_search.go
@@ -151,10 +151,6 @@ func PhotoSearch(f form.PhotoSearch) (results PhotoResults, count int, err error
 		s = s.Where("files.file_error = ''")
 	}
 
-	if f.Album != "" {
-		s = s.Joins("JOIN photos_albums ON photos_albums.photo_uid = photos.photo_uid").Where("photos_albums.hidden = 0 AND photos_albums.album_uid = ?", f.Album)
-	}
-
 	if f.Camera > 0 {
 		s = s.Where("photos.camera_id = ?", f.Camera)
 	}
@@ -286,6 +282,14 @@ func PhotoSearch(f form.PhotoSearch) (results PhotoResults, count int, err error
 		s = s.Where("photos.taken_at >= ?", f.After.Format("2006-01-02"))
 	}
 
+	if f.Album != "" {
+		if f.Filter != "" {
+			s = s.Where("photos.photo_uid NOT IN (SELECT photo_uid FROM photos_albums pa WHERE pa.hidden = 1 AND pa.album_uid = ?)", f.Album)
+		} else {
+			s = s.Joins("JOIN photos_albums ON photos_albums.photo_uid = photos.photo_uid").Where("photos_albums.hidden = 0 AND photos_albums.album_uid = ?", f.Album)
+		}
+	}
+
 	// Set sort order for results.
 	switch f.Order {
 	case entity.SortOrderRelevance:
diff --git a/internal/service/cache.go b/internal/service/cache.go
index 0571ca274..e4cf43923 100644
--- a/internal/service/cache.go
+++ b/internal/service/cache.go
@@ -4,16 +4,22 @@ import (
 	"sync"
 	"time"
 
-	gc "github.com/patrickmn/go-cache"
+	"github.com/allegro/bigcache"
 )
 
 var onceCache sync.Once
 
 func initCache() {
-	services.Cache = gc.New(336*time.Hour, 30*time.Minute)
+	var err error
+
+	services.Cache, err = bigcache.NewBigCache(bigcache.DefaultConfig(time.Hour))
+
+	if err != nil {
+		log.Errorf("")
+	}
 }
 
-func Cache() *gc.Cache {
+func Cache() *bigcache.BigCache {
 	onceCache.Do(initCache)
 
 	return services.Cache
diff --git a/internal/service/service.go b/internal/service/service.go
index 901b717f9..8db3d69fc 100644
--- a/internal/service/service.go
+++ b/internal/service/service.go
@@ -1,19 +1,21 @@
 package service
 
 import (
-	gc "github.com/patrickmn/go-cache"
+	"github.com/allegro/bigcache"
 	"github.com/photoprism/photoprism/internal/classify"
 	"github.com/photoprism/photoprism/internal/config"
+	"github.com/photoprism/photoprism/internal/event"
 	"github.com/photoprism/photoprism/internal/nsfw"
 	"github.com/photoprism/photoprism/internal/photoprism"
 	"github.com/photoprism/photoprism/internal/query"
 	"github.com/photoprism/photoprism/internal/session"
 )
 
+var log = event.Log
 var conf *config.Config
 
 var services struct {
-	Cache    *gc.Cache
+	Cache    *bigcache.BigCache
 	Classify *classify.TensorFlow
 	Convert  *photoprism.Convert
 	Import   *photoprism.Import