(refs #34)Link conversion checks existence of accounts and issues.

src/main/scala/view/AvatarImageProvider.scala

@@ -0,0 +1,26 @@
+package view
+
+import service.RequestCache
+import twirl.api.Html
+import util.StringUtil
+
+trait AvatarImageProvider { self: RequestCache =>
+
+  /**
+   * Returns <img> which displays the avatar icon.
+   * Looks up Gravatar if avatar icon has not been configured in user settings.
+   */
+  protected def getAvatarImageHtml(userName: String, size: Int, tooltip: Boolean = false)(implicit context: app.Context): Html = {
+    val src = getAccountByUserName(userName).collect { case account if(account.image.isEmpty) =>
+      s"""http://www.gravatar.com/avatar/${StringUtil.md5(account.mailAddress)}?s=${size}"""
+    } getOrElse {
+      s"""${context.path}/${userName}/_avatar"""
+    }
+    if(tooltip){
+      Html(s"""<img src=${src} class="avatar" style="width: ${size}px; height: ${size}px;" data-toggle="tooltip" title=${userName}/>""")
+    } else {
+      Html(s"""<img src=${src} class="avatar" style="width: ${size}px; height: ${size}px;" />""")
+    }
+  }
+
+}