feat: Add filter APIs for Contacts and Conversations (#3264)

app/services/conversations/filter_service.rb

@@ -0,0 +1,59 @@
+class Conversations::FilterService < FilterService
+  def perform
+    @conversations = conversation_query_builder
+    mine_count, unassigned_count, all_count, = set_count_for_all_conversations
+    assigned_count = all_count - unassigned_count
+
+    {
+      conversations: conversations,
+      count: {
+        mine_count: mine_count,
+        assigned_count: assigned_count,
+        unassigned_count: unassigned_count,
+        all_count: all_count
+      }
+    }
+  end
+
+  def conversation_query_builder
+    conversation_filters = @filters['conversations']
+    @params[:payload].each_with_index do |query_hash, current_index|
+      current_filter = conversation_filters[query_hash['attribute_key']]
+      @query_string += conversation_query_string(current_filter, query_hash, current_index)
+    end
+
+    base_relation.where(@query_string, @filter_values.with_indifferent_access)
+  end
+
+  def conversation_query_string(current_filter, query_hash, current_index)
+    attribute_key = query_hash[:attribute_key]
+    query_operator = query_hash[:query_operator]
+    filter_operator_value = filter_operation(query_hash, current_index)
+
+    case current_filter['attribute_type']
+    when 'additional_attributes'
+      " conversations.additional_attributes ->> '#{attribute_key}' #{filter_operator_value} #{query_operator} "
+    when 'standard'
+      if attribute_key == 'labels'
+        " tags.id #{filter_operator_value} #{query_operator} "
+      else
+        " conversations.#{attribute_key} #{filter_operator_value} #{query_operator} "
+      end
+    end
+  end
+
+  def base_relation
+    Current.account.conversations.left_outer_joins(:labels)
+  end
+
+  def current_page
+    @params[:page] || 1
+  end
+
+  def conversations
+    @conversations = @conversations.includes(
+      :taggings, :inbox, { assignee: { avatar_attachment: [:blob] } }, { contact: { avatar_attachment: [:blob] } }, :team
+    )
+    @conversations.latest.page(current_page)
+  end
+end