init project

app/services/users/course_service.rb

@@ -0,0 +1,52 @@
+class Users::CourseService
+  include CustomSortable
+
+  sort_columns :created_at, :updated_at, default_by: :updated_at, default_direction: :desc
+
+  attr_reader :user, :params
+
+  def initialize(user, params)
+    @user   = user
+    @params = params
+  end
+
+  def call
+    courses = category_scope_courses.not_deleted.not_excellent
+
+    courses = status_filter(courses)
+
+    custom_sort(courses, params[:sort_by], params[:sort_direction])
+  end
+
+  private
+
+  def category_scope_courses
+    case params[:category]
+    when 'study' then
+      user.as_student_courses.started
+    when 'manage' then
+      user.manage_courses
+    else
+      ids = user.as_student_courses.started.pluck(:id) + user.manage_courses.pluck(:id)
+      Course.where(id: ids)
+    end
+  end
+
+  def status_filter(relations)
+    # 只有自己查看才有过滤
+    return relations unless observed_logged_user?
+
+    case params[:status]
+    when 'processing' then
+      relations.processing
+    when 'end' then
+      relations.ended
+    else
+      relations
+    end
+  end
+
+  def observed_logged_user?
+    User.current.id == user.id
+  end
+end