client/posts: provide link for danbooru image search

client/css/post-main-view.styl

@@ -7,8 +7,8 @@
 
     >.sidebar
         margin-right: 1em
-        min-width: 20em
-        max-width: 20em
+        min-width: 21em
+        max-width: 21em
         line-height: 160%
 
         a:active

client/html/post_readonly_sidebar.tpl

@@ -52,6 +52,7 @@
         <section class='search'>
             Search on
             <a href='http://iqdb.org/?url=<%- encodeURIComponent(ctx.post.fullContentUrl) %>'>IQDB</a> &middot;
+            <a href='https://danbooru.donmai.us/posts?tags=md5:<%- ctx.post.checksumMD5 %>'>Danbooru</a> &middot;
             <a href='https://www.google.com/searchbyimage?&image_url=<%- encodeURIComponent(ctx.post.fullContentUrl) %>'>Google Images</a>
         </section>
 

client/js/models/post.js

@@ -38,6 +38,14 @@ class Post extends events.EventTarget {
         return this._mimeType;
     }
 
+    get checksumSHA1() {
+        return this._checksumSHA1;
+    }
+
+    get checksumMD5() {
+        return this._checksumMD5;
+    }
+
     get creationTime() {
         return this._creationTime;
     }
@@ -459,6 +467,8 @@ class Post extends events.EventTarget {
             _id: response.id,
             _type: response.type,
             _mimeType: response.mimeType,
+            _checksumSHA1: response.checksum,
+            _checksumMD5: response.checksumMD5,
             _creationTime: response.creationTime,
             _user: response.user,
             _safety: response.safety,