[#247] Filters conversation by status and paginate conversations (#284)

* [#247] Filters conversation by status

* Fixes conversation finder specs

* [#248] Paginates conversation

* Use method name in description

* Move page to default param, add filters on frontend

* Fix code climate issues

app/finders/conversation_finder.rb

@@ -6,6 +6,8 @@ class ConversationFinder
   ASSIGNEE_TYPES_BY_ID = ASSIGNEE_TYPES.invert
   ASSIGNEE_TYPES_BY_ID.default = :me
 
+  DEFAULT_STATUS = 'open'.freeze
+
   # assumptions
   # inbox_id if not given, take from all conversations, else specific to inbox
   # assignee_type if not given, take 'me'
@@ -15,7 +17,7 @@ class ConversationFinder
   # {conversations: [array of conversations], count: {open: count, resolved: count}}
 
   # params
-  # assignee_type_id, inbox_id, :conversation_status_id,
+  # assignee_type_id, inbox_id, :status
 
   def initialize(current_user, params)
     @current_user = current_user
@@ -27,12 +29,21 @@ class ConversationFinder
     set_inboxes
     set_assignee_type
 
-    find_all_conversations # find all with the inbox
-    filter_by_assignee_type # filter by assignee
-    open_count, resolved_count = set_count_for_all_conversations # fetch count for both before filtering by status
+    find_all_conversations
+    filter_by_status
 
-    { conversations: @conversations.latest,
-      count: { open: open_count, resolved: resolved_count } }
+    mine_count, unassigned_count, all_count = set_count_for_all_conversations
+
+    filter_by_assignee_type
+
+    {
+      conversations: conversations,
+      count: {
+        mine_count: mine_count,
+        unassigned_count: unassigned_count,
+        all_count: all_count
+      }
+    }
   end
 
   private
@@ -69,7 +80,23 @@ class ConversationFinder
     @conversations
   end
 
+  def filter_by_status
+    @conversations = @conversations.where(status: params[:status] || DEFAULT_STATUS)
+  end
+
   def set_count_for_all_conversations
-    [@conversations.open.count, @conversations.resolved.count]
+    [
+      @conversations.assigned_to(current_user).count,
+      @conversations.unassigned.count,
+      @conversations.count
+    ]
+  end
+
+  def current_page
+    params[:page]
+  end
+
+  def conversations
+    current_page ? @conversations.latest.page(current_page) : @conversations.latest
   end
 end