Show number of Likes on posts and Stats pages

Ref T906

database.go

@@ -115,6 +115,7 @@ type writestore interface {
 	DispersePosts(userID int64, postIDs []string) (*[]ClaimPostResult, error)
 	ClaimPosts(cfg *config.Config, userID int64, collAlias string, posts *[]ClaimPostRequest) (*[]ClaimPostResult, error)
 
+	GetPostLikeCounts(postID string) (int64, error)
 	GetPostsCount(c *CollectionObj, includeFuture bool)
 	GetPosts(cfg *config.Config, c *Collection, page int, includeFuture, forceRecentFirst, includePinned bool) (*[]PublicPost, error)
 	GetAllPostsTaggedIDs(c *Collection, tag string, includeFuture bool) ([]string, error)
@@ -1174,6 +1175,12 @@ func (db *datastore) GetPost(id string, collectionID int64) (*PublicPost, error)
 		return nil, ErrPostUnpublished
 	}
 
+	// Get additional information needed before processing post data
+	p.LikeCount, err = db.GetPostLikeCounts(p.ID)
+	if err != nil {
+		return nil, err
+	}
+
 	res := p.processPost()
 	if ownerName.Valid {
 		res.Owner = &PublicUser{Username: ownerName.String}
@@ -1236,6 +1243,18 @@ func (db *datastore) GetPostProperty(id string, collectionID int64, property str
 	return res, nil
 }
 
+func (db *datastore) GetPostLikeCounts(postID string) (int64, error) {
+	var count int64
+	err := db.QueryRow("SELECT COUNT(*) FROM remote_likes WHERE post_id = ?", postID).Scan(&count)
+	switch {
+	case err == sql.ErrNoRows:
+		count = 0
+	case err != nil:
+		return 0, err
+	}
+	return count, nil
+}
+
 // GetPostsCount modifies the CollectionObj to include the correct number of
 // standard (non-pinned) posts. It will return future posts if `includeFuture`
 // is true.

posts.go

@@ -105,6 +105,7 @@ type (
 		Created        time.Time     `db:"created" json:"created"`
 		Updated        time.Time     `db:"updated" json:"updated"`
 		ViewCount      int64         `db:"view_count" json:"-"`
+		LikeCount      int64         `db:"like_count" json:"likes"`
 		Title          zero.String   `db:"title" json:"title"`
 		HTMLTitle      template.HTML `db:"title" json:"-"`
 		Content        string        `db:"content" json:"body"`
@@ -127,6 +128,7 @@ type (
 		IsTopLevel  bool           `json:"-"`
 		DisplayDate string         `json:"-"`
 		Views       int64          `json:"views"`
+		Likes       int64          `json:"likes"`
 		Owner       *PublicUser    `json:"-"`
 		IsOwner     bool           `json:"-"`
 		URL         string         `json:"url,omitempty"`
@@ -1184,6 +1186,7 @@ func fetchPostProperty(app *App, w http.ResponseWriter, r *http.Request) error {
 func (p *Post) processPost() PublicPost {
 	res := &PublicPost{Post: p, Views: 0}
 	res.Views = p.ViewCount
+	res.Likes = p.LikeCount
 	// TODO: move to own function
 	loc := monday.FuzzyLocale(p.Language.String)
 	res.DisplayDate = monday.Format(p.Created, monday.LongFormatsByLocale[loc], loc)

templates/collection-post.tmpl

@@ -55,6 +55,7 @@
 				{{range .PinnedPosts}}<a class="pinned{{if eq .Slug.String $.Slug.String}} selected{{end}}" href="{{if not $.SingleUser}}/{{$.Collection.Alias}}/{{.Slug.String}}{{else}}{{.CanonicalURL $.Host}}{{end}}">{{.PlainDisplayTitle}}</a>{{end}}
 				{{end}}
 				{{ if and .IsOwner .IsFound }}<span class="views" dir="ltr"><strong>{{largeNumFmt .Views}}</strong> {{pluralize "view" "views" .Views}}</span>
+                {{if .Likes}}<span class="views" dir="ltr"><strong>{{largeNumFmt .Likes}}</strong> {{pluralize "like" "likes" .Likes}}</span>{{end}}
 				<a class="xtra-feature" href="/{{if not .SingleUser}}{{.Collection.Alias}}/{{end}}{{.Slug.String}}/edit" dir="{{.Direction}}">Edit</a>
 				{{if .IsPinned}}<a class="xtra-feature unpin" href="/{{.Collection.Alias}}/{{.Slug.String}}/unpin" dir="{{.Direction}}" onclick="unpinPost(event, '{{.ID}}')">Unpin</a>{{end}}
 				{{ end }}

templates/user/stats.tmpl

@@ -51,11 +51,13 @@ td.none {
 			<th>Post</th>
 			{{if not .Collection}}<th>Blog</th>{{end}}
 			<th class="num">Total Views</th>
+			{{if .Federation}}<th class="num">Likes</th>{{end}}
 		</tr>
 		{{range .TopPosts}}<tr>
 			<td style="word-break: break-all;"><a href="{{if .Collection}}{{.Collection.CanonicalURL}}{{.Slug.String}}{{else}}/{{.ID}}{{end}}">{{if ne .DisplayTitle ""}}{{.DisplayTitle}}{{else}}<em>{{.ID}}</em>{{end}}</a></td>
 			{{ if not $.Collection }}<td>{{if .Collection}}<a href="{{.Collection.CanonicalURL}}">{{.Collection.Title}}</a>{{else}}<em>Draft</em>{{end}}</td>{{ end }}
 			<td class="num">{{.ViewCount}}</td>
+			{{if $.Federation}}<td class="num">{{.LikeCount}}</td>{{end}}
 		</tr>{{end}}
 	</table>